CN1862601A - Object sensor and controller - Google Patents

Abstract

A sensor for detecting a specific object (such as a hand) excellent in operation reliability and response, further excellent in mountability (dominance such as in size and design) on a vehicle, and much less in power consumption than conventional impulse radars. The object sensor comprises detecting wave transmitting means and reflected wave receiving means of an impulse radar and a judging circuit part (40) for turning on the detection output when the amplitude level of a signal component, in a frequency range corresponding to the moving speed range of a specific object, of a signal received by the reflected wave receiving means lies in a predetermined range corresponding to the reflection characteristics of the specific object.

Description

Object detection device and control device

The present invention is that application number is 02824591.1, the applying date is that Dec 6, denomination of invention in 2002 are dividing an application of object detection device and control device.

Technical field

For example the present invention relates to be fit to enabling signal (trigger pip), the object detection device of the situation when detecting hand for the vehicle user of carrying out opening door operation etc. and use the control device of this sniffer near door handle for the auto-unlocking action of the passive gate access control system that generates vehicle.

Background technology

In recent years, aspects such as gate control system at vehicle, proposed at the entrained machine that carries of vehicle user and be configured between the main body machine on the vehicle device that carries out two-way communication, carried out realizing on the necessary basis of checking affirmation the auto-action of vehicle mounting, and a part is by practical application.

In the device of such two-way communication formula, for the request signal that is sent by the main body machine (for example, the initiating signal of machine is carried in starting), owing to can send the response signal that includes necessary coding automatically to the main body machine by carrying machine, even thereby the user do not carry out any operation, also can realize the specified action of vehicle mounting.For example, in the gate control system of vehicle, the user who has carried machine only needs near the door that has disposed the specific vehicle of pairing main body machine, just set up above-mentioned two-way communication, can automatically export unlock instruction this moment to the door lock assembly that is in locking state, automatically opens the door of vehicle.In addition, so very convenient gate control system that does not need the conscious operation of user to realize unblanking of vehicle doorn basically or lock action, modified as the gate control system that does not need general key, be called as passive gate access control system (or intelligent access control system) etc., such system has improved the commodity value of vehicle, and the demand in its market improves.

But, for example in this kind passive gate access control system, the request signal of autonomous agent machine only sends where necessary if want as far as possible in the future, saves the battery power of vehicle with this, then needs to be provided with the sniffer of detection near to or in contact with the vehicle (for example door handle part) of vehicle user.

But,,, used the sensor or the mechanical switch (so-called microswitch etc.) of optical profile type or electrostatic capacitive as such sniffer in the past.The output that the sensor of optical profile type is for example incided the photo detector of photo detector by the reflected light that hand reflected of vehicle user for the variation of the output of the photo detector that covers the light that is sent by light-emitting component according to for example hand by vehicle user or the light that will be exported by light-emitting component changes the hand of the surveying vehicle user for example sensor near the situation of door handle.On the other hand, the sensor of electrostatic capacitive is so-called feeler, for example, as the spy open the 2002-295064 communique disclosed, contact according to the hand by vehicle user changes the condenser capacitance in the sensor, surveys for example sensor of the situation of the hand contact door handle of vehicle user.

In addition, as contactless Proximity Sensor, well-known have: for example international disclose No. 00/023762 pamphlet disclosed such, employed pulsed radar in mine detection etc.

But above-mentioned sniffer exists following problem.

(a) under the situation of optical profile type sensing transducer, because dirt and having of foreign matter (for example rainwater and dead leaf etc.) may cause misoperation.

(b) because investigative range is narrow, (detection range is short), thereby be difficult to reach sufficient response, action failure might take place in application system.For example, in the passive gate access control system of vehicle, for the enabling signal that obtains sending request signal and be provided with under the situation of described sensor on the handle at vehicle doorn, since user's hand when not reaching with degree of closeness that sensor contact just detection less than (, can not export request signal), thereby when the user has begun the pulling door handle in order to open door, and also do not carry out auto-unlocking, so exist can not open at once the door unfavorable condition (promptly, want to open the door of executing the lock state even use the passive gate access control system, because the slow movement of auto-unlocking, thereby can not open door at once, make the user feel the sensation of being caught hold of).Particularly, under the situation of static capacity type sensor and mechanical switch, because user's hand just can't detect when not touching sensor fully, thereby can say at least, in the structure that merely sensor is installed on the door handle, owing to carry machine communicate by letter and auto-unlocking will can carry out after the user starts drag door handle in order to open the door, thereby above-mentioned unfavorable condition take place be inevitable.

(c) since sensor element bigger, built-in difficulty need be arranged on to survey object approaching position (for example, the door handle of vehicle) on, thereby shape and the size of surveying the approaching position of object need be carried out sizable change, therefore make the design freedom at this position be very limited.Particularly in order to detect hand by optical sensor or mechanical switch near the user of the door handle of vehicle as far as possible high responsiveness, owing to light-emitting component and photo detector need be arranged on the next door of door handle or the contact head of mechanical switch is arranged on the outstanding position of door handle, thereby will the design of door handle or its peripheral car body be made a big impact.

In addition, can set very big as investigative range, be not subjected to the contactless Proximity Sensor of the influence of dirt etc., as previously described, we know employed pulsed radar in mine detection device etc., and inventors inquire into using this pulsed radar as foregoing sniffer.But, we know because in pulsed radar in the past, used microcomputer (hereinafter referred to as microcomputer), (for example, the waveform of getting a plurality of reflection waves compares, analyzes to carry out complicated judgment processing with it, judge whether to exist the processing of specific object), therefore thereby consumed power is very big, can not be directly it be used as the object detection device that with the battery is the vehicle etc. of power supply.Particularly in front under the situation of the sniffer of the passive gate access control system of described vehicle, in order at any time to detect hand near door handle, even under the out-of-work state of vehicle, also must continue repeatedly (for example periodically) exports the probing wave of radar, receive reflection wave, the detection of implementing to judge is moved, if owing to do not suppress the power consumption of this detection action as far as possible, then can cause the running down of battery of vehicle, thereby require it to compare with mine detection device etc., become order of magnitude ground saves energy, therefore can not directly use pulsed radar in the past.

Summary of the invention

The objective of the invention is to solve the above problems, a kind of technology of utilizing pulsed radar is provided, in reliable in action and response, and to the configuration good object detection devices in aspect such as (superiority) of vehicle etc. at aspects such as size and designs, and make it greatly reduce power consumption, and a kind of control device that uses this object detection device is provided than in the past pulsed radar.

Object detection device of the present invention has: pulsed radar probing wave dispensing device and reflection wave receiving trap for surveying the object detection device of certain objects with the approaching situation of specific velocity range; With decision circuitry portion, be used for the signal that received by described reflection wave receiving trap, when the amplitude level of the signal content in the frequency range of the described velocity range of correspondence is in the specialized range of rerum natura of corresponding described certain objects, the output detectable signal.

Here, so-called " certain objects " for example is people's hand.In addition, so-called " specific velocity range " for example allows velocity range when manually doing usually for the people.In addition, so-called " rerum natura of certain objects ", specifically the character for the reflection characteristic to electric wave exerts an influence, be mainly specific inductive capacity.

In addition, " decision circuitry portion " is for example by from the signal that is received by described reflection wave receiving trap, only output be positioned at described frequency range signal content wave filter and with the output amplitude level of this wave filter and be equivalent to the threshold of the boundary of described specialized range, the comparator circuit of output detectable signal constitutes when the relative described amplitude level of this threshold value is positioned at described specialized range one side, can realize the structure of simple and miniaturization thus.

According to this object detection device, can obtain following effect.

(1) owing to utilizes pulsed radar under contactless state, to survey approaching as the certain objects of detected object, thereby just can not produce because of the caused mistake detection of dirt, in addition, compare with in the past optical sensor etc., also greatly reduced because of existing of foreign matter (for example rainwater and the dead leaf etc.) possibility surveyed of caused mistake.Particularly in this device, because according to receiving intensity (amplitude level) and the frequency both sides of reflection wave, certain objects and the difference of other foreign matter come survey, thereby it is minimum to miss the possibility of the foreign matter of surveying other.

(2) owing to, investigative range can be set at the size of fully big (detection range is decided to be sufficient length) appropriateness, thereby can easily obtain sufficient response by setting the transmission output and the receiving sensitivity of pulsed radar.

(3), thereby just there is no need and all elements (decision circuitry portion etc.) of object detection device must be arranged on the approaching regulation position (for example, the door handle of vehicle) of wanting inspected object owing to utilized pulsed radar.Promptly, as long as be arranged on regulation position or its next door to the antenna of major general's pulsed radar.In addition, in this device, owing to be to survey judgement by the frequency and the amplitude level of reflection wave signal, use microcomputer to carry out the structure of judgment processing so there is no need to constitute, thereby the structure that makes decision circuitry portion becomes extremely simple and volume is little, and the object detection device integral body that for example will comprise decision circuitry portion is built in the door handle and also is relatively easy to.Therefore, there is no need to change the shape and the size on regulation position (or its next door), the degree of freedom of its design can not be very limited yet.

(4) this object detection device is owing to be to have constituted as described above to there is no need to use microcomputer to carry out the structure of judgment processing, thereby compare with the pulsed radar in the past that carries out complicated judgment processing by microcomputer, only consume electric energy seldom, for example, can be configured to without a doubt on the vehicle and (can solve the problem of the running down of battery of vehicle) as the enabling signal generating apparatus of passive gate access control system.

In addition, as the necessary tranmitting data register generative circuit of the key element of described probing wave dispensing device (generating the circuit of so-called reference wave) with as the necessary receive clock generative circuit of the key element of described reflection wave receiving trap (generating the circuit of so-called beating wave), preferably constitute by other oscillatory circuit.In this case, and the pulsed radar in the past of the multistage frequency division of reference wave is compared, can further be reduced power consumption in order to generate beating wave.

In addition, at object detection device of the present invention or use in the system of this device, the action of switching in the short time when the detection output of described decision circuitry portion also can be set (for example, be not variation for the output of approaching short time of the people's of certain objects hand) frequency when reaching the degree of regulation, set the treating apparatus of the invalid prohibited mode of the detection output that makes described decision circuitry portion.And, treating apparatus in this case preferably have set behind the described prohibited mode action judging the detection output that stops described decision circuitry portion and switch at short notice, maybe when the function of when being set to of described prohibited mode passed through official hour, just removing described prohibited mode.

When possessing when this kind treating apparatus is arranged, for example under the situation that generation mistakes time and again such as the contingency raindrop high because of specific inductive capacity are surveyed, the action that stops the system that mistake surveys (for example, the machine that carries to the passive gate access control system sends initiating signal), avoid surveying the unfavorable condition move repeatedly (for example, send repeatedly described initiating signal, waste the unfavorable condition of the electric energy of Vehicular battery in a large number) because of mistake.In addition, have the function of removing prohibited mode, can prevent owing to set above-mentioned prohibited mode, the defective that the action of system can not be carried out always by above-mentioned treating apparatus.

In addition, object detection device of the present invention, be suitable for being arranged on taking advantage of on the carrier of vehicle etc., be used for and (for example survey as certain objects near the hand of the vehicle user of the handle (rotating handles) of the switching portion that takes advantage of carrier (door and automobile tail luggage case etc.), the enabling signal of the passive gate access control system of vehicle generates to be used), or be used near buildings possessed, the user's of the buildings of the handle of the switching portion of buildings (door and switch etc.) hand (is for example surveyed as described certain objects, the enabling signal of the passive gate access control system of buildings generates to be used), but in this case, be preferably and constitute the transmitting antenna of described probing wave dispensing device, be arranged at the inside of described handle with the receiving antenna that constitutes described reflection wave receiving trap, the surface of described handle, the structure on the surface of the inside of described switching portion or described switching portion.Like this, just can the design of handle and switching portion not impacted, can set good bigger investigative range, can under the good state of reliability height and response, survey the people's who wants operating handle hand on the next door of handle.

In addition, above-mentioned transmitting antenna also can be configured on the identical position side by side with receiving antenna, but also a side can be arranged on the inside of described handle or surface, the opposing party is arranged on the inside of described switching portion or surface, is configured to handle one side and switching portion one side (for example in door one side) respectively.Like this, just the investigative range of the area of required irreducible minimum can be set on the good position (position between handle and the switching portion) at an easy rate.

In addition, at enabling signal generating apparatus that the situation that object detection device is arranged on the handle is inferior as the passive gate access control system, the investigative range of this object detection device is more suitable for being set in the inboard of handle compared with outer position.Like this, can prevent from effectively merely to export detectable signal, prevent the invalid transmission of request signal etc. because of near the people's that is positioned at door handle hand.

In addition, above-mentioned investigative range is preferably the side that hand inserted that extends to the user from the inboard of handle, so that want the hand near the user of handle of operating handle to insert before the handle inboard, can be detected by object detection device.Under such state, can be sooner and detect the user's who wants operating handle hand definitely, improve reliability and response more.

In addition, control device of the present invention is the control device that is installed in the passive gate access control system of taking advantage of carrier or buildings or alarming abnormality in tire air-pressure system etc., as the device that will survey as described certain objects near the user's who takes advantage of carrier or buildings of the handle of the switching portion that takes advantage of carrier or buildings hand, have object detection device of the present invention, its detection output with this object detection device utilizes as the enabling signal of the action (auto-unlocking action or and alarming abnormality in tire air-pressure action) of system.

According to this control device, by object detection device of the present invention, can reliability very high and response detect hand well near handle, and with it as enabling signal, by being installed in the main body machine of taking advantage of on carrier or the buildings request signal is sent to the entrained machine that carries of user, when by carrying the response signal (carry machine response signal) when sending to main body machine of machine with regulation, implement the auto-unlocking action (will be in execute the lock state under etc. the action unblanked automatically of switching portion), or further carry out the alarming abnormality in tire air-pressure action and (obtain the tire pressure measurement data, under the situation of judging pressure abnormity, the action of output alarm signal).

Therefore, when giving full play to the convenience of system, can greatly reduce the system that makes that surveys because of mistake that (enabling signal that makes a mistake) produces and carry out the possibility of the unfavorable condition (unnecessarily send request signal, consumption is taken advantage of the battery of carrier, increased the unfavorable condition of the standby electricity consumption of buildings lavishly lavishly) of unnecessary action.In addition, reduced the shape and the big or small necessity of the handle of change switching portion, the degree of freedom of its design also can be very limited.In addition, such as described, with the direct configuration of pulsed radar is compared as the structure of enabling signal generating apparatus in the past, owing to greatly reduced the power consumption of the object detection device of enabling signal generation usefulness, thereby can fully reduce the electricity consumption of buildings, also can remove the problem of the running down of battery of taking advantage of carrier.

In addition, also the receiving antenna (main body machine receiving antenna) and the antenna of described reflection wave receiving trap that constitutes the transmitting antenna of the transmitting antenna (main body machine transmitting antenna) of described main body machine and described probing wave dispensing device and/or constitute described main body machine can be made of shared antenna, but simplified structure thus.

In addition, also the receiving antenna of aforementioned body machine transmitting antenna and/or aforementioned body machine and the receiving antenna that constitutes the transmitting antenna of described probing wave dispensing device and constitute described reflection wave receiving trap can be separately positioned on the inside of the surface of the inside of described handle, described handle, described switching portion or the surface of described switching portion together or with these antenna.

Description of drawings

Fig. 1 is the control device of expression embodiments of the present invention and the unitary construction figure of object detection device.

Fig. 2 is the figure of the main structure of expression object detection device.

Fig. 3 is the action diagram of explanation object detection device.

Fig. 4 is the process flow diagram of the control content of expression control device.

Fig. 5 is the shape of expression antenna and the figure of configuration.

Fig. 6 is the figure of explanation arrangement of antennas and investigative range.

Fig. 7 is the figure of other examples of explanation arrangement of antennas and investigative range.

Fig. 8 is the figure of the other example of explanation arrangement of antennas.

Fig. 9 is the figure of expression with the structure example under the antenna duplexer situation.

Figure 10 is the figure that the embodiment of the door (bar shaped handle) that is applied to buildings is described.

Figure 11 is the figure that the embodiment of the door (knob-shaped handle) that is applied to buildings is described

Embodiment

For the present invention is further detailed, describe in conjunction with the accompanying drawings.

(the 1st embodiment)

At first, the 1st embodiment of the present invention is described.Present embodiment is to use example of the present invention in the control device of the passive gate access control system (or alarming abnormality in tire air-pressure system) at vehicle.This system is to be made of the main body machine 20 and the object detection device 30 that carry machine 10, be configured on the vehicle shown in Fig. 1 (a).

Carrying machine 10 (diagram omit) has: for example receive the antenna of low frequency wave (LF) initiating signal of 100～150kHz degree and receiving circuit, with high frequency waves (for example frequency in the UHF frequency band) the described response signal in back and operation signal (lock operation signal or unlock operation signal) are carried out the transtation mission circuit of wireless transmission and antenna, authenticate the machine that the carries memory storage that coding (be also referred to as ID encode etc.) stores (the control of microcomputer circuit and the internal battery that for example, EEPROM), comprise the information processing of the control of carrying machine integral body and necessity to the major general.

In addition, said here initiating signal is that the signal of the microcomputer of machine 10 is carried in starting according to WAIT pattern (suppress the low power consumption pattern of power consumption, also claim sleep state).In this case, the microcomputer that carries machine 10 is programmed to when according to this initiating signal starting, the response signal (carrying the machine response signal) that will comprise above-mentioned authentication coding is written into high-frequency electric wave and carries out wireless transmission, that is to say that above-mentioned initiating signal promptly is equivalent to request signal of the present invention.

In addition, in this case, carry electric energy that machine 10 needed electric energy (electric energy when starting at least) also can origin autonomous agent machine and send and keep.In this case, because is low frequency by main body machine 20 to the transmission frequency of carrying machine 10, thereby use this electric wave just can carry out electric energy more effectively and transmit, from principle carry machine 10 needed electric energy also all the electric energy of origin autonomous agent machine send and keep, so just do not need the internal battery of the machine that carries.

In addition, also can constitute the structure of the straighforward operation of the common gate control system that does not need key (one-way communication formula) with being the locking with switch and unblank to be arranged on the surface of the machine of carrying 10 of the operating portion of push button with switch (diagram is omitted).Promptly, carry machine 10 also can have receive above-mentioned initiating signal start, with the described request signal function that sends of number of times in accordance with regulations, and have when above-mentioned and lock with switch or just start when unblanking to be operated, will comprise the operation signal or comprise that the unlock operation signal of authentication coding carries out the function of wireless transmission of locking of authentication coding with switch.And, also can constitute these ought be locked operation signal or unlock operation signal and send, when main body machine 20 receives these signals, according to the control function of main body machine 20, carrying out checking on the basis of affirmation, at once the door of vehicle is being implemented to lock or unblank.

In addition, the machine that carries 10 of this example just automatically restores to the WAIT pattern when the necessary operation that is through with (for example sending above-mentioned request signal), then, till reception that initiating signal is arranged etc., continue to be in the state of the inhibition power consumption of WAIT pattern, but might not be limited to this kind state.For example also can for: carry machine 10 and carry out standby as ready mode when the stable state, just move to pattern, receiving circuit is moved, receive action discontinuously in each stipulated time.And, also can be following state, promptly in the reception action of this interruption, (not initiating signal, just require the signal of response signal when receiving by the request signal of the regulation of main body machine 20 wireless transmissions, be not limited to low frequency, high-frequency signal also can) time, just this is responded, number of times will comprise that the response signal of carrying the authentication coding that the pusher side memory storage logined carries out wireless transmission in accordance with regulations.

On the other hand, main body machine 20 has shown in Fig. 1 (a):control circuit 21,transtation mission circuit 22 and transmitting antenna 23 (main body machine transmitting antenna), receiving circuit 24 and receiving antenna 25 (main body machine receiving antenna).Under this situation,transtation mission circuit 22 and transmitting antenna 23 are used for foregoing low-frequency starting signal is sent, and receiving circuit 24 and receivingantenna 25 are used for the response signal and the operation signal of foregoing high frequency are received.Control circuit 21 is equivalent to treating apparatus of the present invention, include the microcomputer of the necessary processing of control of the doorlock driving device 1 of the control of carrying out main body machine integral body and vehicle, in this case, be built-in with the main body pusher side memory storage (for example, EEPROM) of authentication storage coding.

In addition,control circuit 21,transtation mission circuit 22 and receiving circuit 24 are arranged in the control module (ECU) of the door inside etc. that for example is configured to vehicle.In addition, also transmitting antenna 23 and receivingantenna 25 can be arranged in the above-mentioned control module, but also can be set on the position different (for example, room mirror, peephole or door handle etc.) with above-mentioned control module.

Below, object detection device 30 is described.

Object detection device 30 under this situation is the structure shown in Fig. 1 (b) for surveying health (for example hand and finger) near the vehicle user of the door handle of vehicle, generating the door handle sensor of detection output of enabling signal of the auto-unlocking action of door.Promptly, aspect big, divide, constitute bysensor circuit 31 and transmittingantenna 32, receiving antenna 33.Andsensor circuit 31 has tranmitting data register generative circuit 34 and pulse shaping circuit 35, receive clock generative circuit 36, beat frequency generative circuit 37, sampling pulse shaping circuit 38, sampling hold circuit 39 and decision circuitry portion 40.

In addition, tranmitting data register generative circuit 34, pulse shaping circuit 35 and transmittingantenna 32 are the key element that is equivalent to the probing wave dispensing device of pulsed radar, and receive clock generative circuit 36, beat frequency generative circuit 37, sampling pulse shaping circuit 38, sampling hold circuit 39 and receivingantenna 33 are the key element that is equivalent to the reflection wave receiving trap of pulsed radar.

In addition, alsosensor circuit 31 andcontrol circuit 21 etc. can be arranged in the foregoing control module together, but also can be encased in the door handle.

Here, tranmitting data register generative circuit 34 is for the circuit of the reference wave that generates pulsed radar (for example, 455kHz), for example by being constituted with the oscillatory circuit of the crystal oscillator shown in Fig. 2 (a) as oscillation source.In addition, receive clock generative circuit 36 is the circuit of the beating wave that generates pulsed radar (for example, 1kHz), the circuit different with tranmitting data register generative circuit 34 that for example is made of the Colpitts type low-power consumption oscillator shown in Fig. 2 (b).

In addition, employed pulsed radars in the past such as mine detection device, by the frequency dividing circuit that the output of the generative circuit of reference wave is carried out repeatedly frequency division is set, generate beating wave by reference wave, but in the frequency dividing circuit in this case owing to consume a lot of electric currents, pulsed radar that in this will be in the past as object detection device 30 be applied to vehicle also be difficult (have vehicle running down of battery may).But, as this example,, just can solve such problem if generate beating wave by other oscillatory circuit of branch of low current loss type.

Next, pulse shaping circuit 35, beat frequency generative circuit 37, sampling pulse shaping circuit 38 and sampling hold circuit 39 and pulsed radar in the past are same key element, below its summary are described.

Pulse shaping circuit 35 carries out shaping with the waveform that tranmitting data register circuit 34 is generated, and is input to transmittingantenna 32 as the square wave of stipulating (pulse).Like this, transmittingantenna 32 is launched periodically and is not launched, and the transmission ripple of regulation (for the frequency content of the restriction of the frequency band wide cut that is subjected to transmittingantenna 32, comprise high frequency) is launched.

Beat frequency generative circuit 37 is for generating the circuit that changes the sampling pulse (having and the corresponding fluctuation composition of beating wave) of the waveform of reference wave by beating wave.Sampling pulse shaping circuit 38 carries out shaping with the waveform that this beat frequency generative circuit 37 is generated, and is input to sampling hold circuit 39.And, in sampling hold circuit 39, the output of sampling pulse shaping circuit 38 is mixed in the input from receivingantenna 33, takes out at low-frequency component (comprising) from the composition that is detected the reflected by objects ripple from the regulation in the input of receivingantenna 33, and output.In addition, will append to technology in the sampling pulse with the corresponding fluctuation composition of beating wave, in pulsed radar, receiving a kind of method of suitable reflection wave effectively.

Next, decision circuitry portion 40 is by low-frequency range amplifying circuit (AMP) 41 andenvelope detecting circuit 42, bandpass filter (BPF) 43,comparator circuit 44,45 formations of interface (I/F) shown in Fig. 2 (c).

Here, low-frequencyrange amplifying circuit 41 is not the element that necessarily needs on principle for the output of sampling hold circuit 39 being enlarged into the circuit of easy to handle level.In addition, the envelope detection is carried out in the output of 42 pairs of low-frequencyrange amplifying circuits 41 of envelope detecting circuit, removes superfluous components (radio-frequency component beyond the described in the back fluctuation composition) in advance.As the output of thisenvelope detecting circuit 42, for example shown in Fig. 3 (a), the object by hand etc. obtains mainly including the waveform of fluctuation composition nearantenna 32,33.Here, the translational speed of the object of the corresponding hand of the frequency of this fluctuation composition etc. increases and decreases (translational speed is fast more, and then frequency is just high more).In addition, thisenvelope detecting circuit 42 neither necessarily need onprinciple.In bandpass filter 43 thereafter, also can comprise the processing of removing of above-mentioned unnecessary composition.But, if thisenvelope detecting circuit 42 is arranged, owing to removed superfluous components in advance, thereby can carry out signal Processing effectively.

In addition,bandpass filter 43 in the output ofenvelope detecting circuit 42 only output with the corresponding frequency range of velocity range (being 1Hz～number 10Hz in this case) of the certain objects that will survey (be people's hand in this case) in the filter circuit of signal content.Comparator circuit 44 with the amplitude level ofbandpass filter 43 output and be equivalent to this situation under people's the threshold of lower limit of the corresponding specialized range of rerum natura (being mainly specific inductive capacity) of hand, when relative this threshold value, described amplitude level when described specialized range one side (, in this case, when having surpassed threshold value), the output detectable signal.Andinterface 45 is input to the circuit ofcontrol circuit 21 for the conversion of carrying out necessary signal aspect, with the output of the comparator circuit 44 detection output as certain objects.

According to this decision circuitry portion 40, when in the determination range shown in Fig. 3 (b), having the output characteristics value (frequency and amplitude level) ofenvelope detecting circuit 42, as the certain objects that will survey (people's hand) nearantenna 32,33, and output detectable signal.

In addition, the amplitude level here is the parameter that is equivalent to receive the receiving intensity of ripple (reflection wave), if ignore the distance difference with antenna, then mainly according to the specific inductive capacity of approaching object increase and decrease.Therefore, the waveform component of the foreign matter different with the specific inductive capacity of certain objects, even its frequency velocity of approach of foreign matter (promptly) and certain objects is roughly the same, but owing to be lower than described threshold value, thereby can not enter in the determination range, so can not detect.In this case, for example water and paper or plastics etc., because permittivity ratio people's hand is much lower, thereby the relatively judgement by above-mentioned comparator circuit 44, just can get rid of very reliably.Promptly, for example, though paper scrap and dead leaf etc. with the identical speed of the speed that moves with people's hand nearantenna 32,33, also can not export the mistake of detectable signal and survey.

In addition, the frequency in the output characteristics value of envelope detecting circuit 42 (frequency of the composition of reflected by objects) as described like that with the translational speed of approaching object corresponding.Therefore, the waveform component of the foreign matter different with the translational speed of certain objects even its amplitude level specific inductive capacity of foreign matter (promptly) is roughly the same with certain objects, also can be got rid of it outside the characteristic range ofbandpass filter 43, can not enter in the determination range, so can not be detected.In this case, for example, even the object (comprising the object that stops) that falls object and move quite lentamente that also moves soon than people's hand is for having the object (for example metal) with the specific inductive capacity of people's the same degree of hand, by the effect of above-mentionedbandpass filter 43, also can get rid of very reliably.For example,,, also can not think this metal pillar by mistake hand and proceed detection near under the state of metal pillar etc. atantenna 32,33 even when vehicle stops.In addition, even just in case, also can avoid mistake to survey effectively in the high fallen words such as raindrop of specific inductive capacity.

Therefore, according to the object detection device under this situation 30, people's hand near the time just can export detectable signal definitely, under general situation, can not produce mistake because of the variation near reaching environment of other foreign matters and survey (can avoid missing repeatedly the unfavorable condition of surveying at least very reliably).

Next, transmittingantenna 32 and receivingantenna 33 be for example shown in Fig. 5 (a), is the simple bar shaped that matches with the door handle shape, is set to be embedded to side by side or dividually the state (or the state that clings) of the inboard of door handle or door.In addition, the structure (shape, configuration, manufacture method etc.) about these antenna can have various forms, will narrate in the back this.

Below, the function ofcontrol circuit 21 and the action of native system are described.

Above-mentionedcontrol circuit 21 has the function of for example following processing action of execution.On promptly, basic, be under the situation of locking state under (in the situation of doorlock driving device 1 operating state) at the door of vehicle, when having of object detection device 30 surveyed output signal, bytranstation mission circuit 22 and transmitting antenna 23 when number of times sends in accordance with regulations with described initiating signal, allow receiving circuit 24 performance functions, carry out and receive action.And, after sending initiating signal, when when carrying machine 10 and receive response signal, just judge whether the included authentication coding of this response signal is corresponding with the prior authentication coding of logining of main body machine aspect memory storage, if this judged result is for affirming, just think and implemented to check affirmation, control doorlock driving device 1, open the door of the vehicle that is in locking state.

But thisroutine control circuit 21 is for example shown in Fig. 3 (c), when having set frequency when action that the detection of object detection device 30 output is switched at short notice (output that is close to impossible short time with people's hand changes) and having reached the degree of regulation, with the detection output of object detection device 30 as invalid prohibited mode (, not sending the pattern of above-mentioned initiating signal) even the output of detection is arranged yet.Specifically, for example, surveying variation that output is switched to from nothing be stipulated number when above at the appointed time with in, or for example surveys and export at the appointed time with the interior variation that is switched to from nothing at the above consecutive hours of stipulated number, just implements prohibited mode.In addition, Fig. 3 (c) for example survey variation that output is switched to from nothing at the appointed time T1 with interior when being 4 times, just for implementing the state of prohibited mode.

In addition,control circuit 21 is after having set above-mentioned prohibited mode, when action that the detection of judgment object sniffer 30 output has stopped switching at short notice or from setting described prohibited mode when merely passing through the stipulated time, just remove described prohibited mode.For example, shown in Fig. 3 (c), in this prohibited mode,, just remove this prohibited mode when the detection of object detection device 30 is output as more than the stipulated time T2 when output signal is arranged.In addition, the releasing of prohibited mode is not limited to this state, the detection that for example also can work as object detection device 30 is output as that stipulated time T2 is above to be carried out when closing, also can unconditionally remove the state of prohibited mode from setting prohibited mode to the time through the stipulated time (for example several minutes～several 10 minutes).

In addition, Fig. 4 is an example of the process flow diagram of the above-mentioned control and treatment (removing the setting of prohibited mode and the processing of releasing) of realization control circuit 21.In this case,control circuit 21 is for example carried out processing shown in Figure 4 periodically.

At first, in step S1, whether decision gate is in locking state, if not locking state, then finishes the processing of 1 sequencer program.Under the situation that is locking state, judge that at step S2 whether what be detected is hand (promptly, object detection device 30 whether the detection output signal arranged), be detected as under the situation of hand, enter into step S3.

Then, judge whether if be normal mode, then to enter step S4 for normal mode (promptly, whether set prohibited mode) at step S3, controltranstation mission circuit 22, with described initiating signal in accordance with regulations number of times send.

Next,, receive response signal, judge whether the included authentication coding of this response signal is checked and confirm as correct at step S5.Confirmed as correctly if it checks, then enter step S6, control doorlock driving device 1 is opened door lock.

In addition, the judged result of step S2, S3, S5 for the situation of negating under, the just the same processing that finishes 1 sequencer program with step S1.

According to the object detection device 30 of present embodiment discussed above and use the control device of this device, can obtain following effect.

(1) because uses pulsed radar to survey the hand of door handle approaching in non-contacting mode, so can not occur because of dirt produces the situation that mistake is surveyed, compare existence because of foreign matter (for example, rainwater and dead leaf etc.) in addition to produce the possibility that mistake surveys also very little with in the past optical sensor etc.Particularly in this device, because according to the receiving intensity (amplitude level) of reflection wave and two aspects of frequency, people's hand and the difference of other foreign matter come survey, thereby it is very little to survey the possibility of hand foreign matter in addition.Therefore, can greatly reduce the possibility of carrying out the unfavorable condition (unfavorable condition that in this case, described initiating signal unnecessarily will be sent, Vehicular battery is unnecessarily consumed) of unnecessary action because of mistake detection generating means.

(2) owing to, investigative range can be set at the size of the appropriateness of fully big (it is fully long to detect distance), thereby just can obtain sufficient response at an easy rate by setting the transmission output and the receiving sensitivity of pulsed radar.In this case, because can be than the hand of the position of the contact door handle position sensing before fully to the user, thereby, when the user will open the handle that begins to pull, the door that is in the vehicle of locking state can be opened definitely automatically, has given full play to the convenience of passive gate access control system.

(3), thereby surveying whole key elements (beingsensor 31 etc. in this case) that might not need to be provided with object detection device 30 on the approaching regulation position (be the door handle of vehicle in this case) of object owing to used pulsed radar.Promptly, as long as be arranged on regulation position (door handle) or its next door to theantenna 32,33 of major general's pulsed radar.In addition, in this device, owing to be to survey judgement by the frequency and the amplitude level of reflection wave signal, in judgment processing, do not use microcomputer, therebysensor 31 be constructed to extremely simple and miniaturization, object detection device 30 integral body that will comprisesensor circuit 31 are built in the door handle and also are relatively easy to.Therefore, the shape of the door handle at change regulation position (or its next door) and the necessity of size are very little, and the degree of freedom of its design can not be very limited yet.

(4) object detection device 30 is not for using the structure of microcomputer as described above in judgment processing.Specifically, by the simple process of the simple decision circuitry portion 40 that constitutes bybandpass filter 43 and comparator circuit 44, carry out the very high detection of reliability and judge.Therefore, only consume very little electric energy,, can be configured to without a doubt on the vehicle and (can eliminate the problem of the running down of battery of vehicle) as the enabling signal generating apparatus of passive gate access control system than the pulsed radar in the past of the complicated judgment processing of carrying out microcomputer.Particularly under the situation of present embodiment, the tranmitting data register generative circuit 34 and the receive clock generative circuit 36 of pulsed radar are made of other oscillatory circuit, handle so need reference wave not carried out multistage frequency division in order to generate beating wave.Therefore, in this also can saves energy, make the power consumption of object detection device 30 become especially little.

When (5) control circuit 21 (treating apparatus) frequency of setting the action of switching in the short time when the detection output of decision circuitry portion 40 (for not being the conversion of the output of approaching short time of people's hand) reaches the degree of regulation, set the detection of decision circuitry portion 40 is exported as invalid prohibited mode (forbidding sending the pattern of described initiating signal).Therefore, for example, just in case take place again and again at the raindrop high under the situation of mistake detection because of specific inductive capacity, stop the action (in this case for sending described initiating signal) of the system of mistake detection, can avoid surveying the unfavorable condition (in this case for sending described initiating signal repeatedly, the unfavorable condition of wasting the electric energy of Vehicular battery in a large number) of perseveration thus because of mistake.

In addition, in the present embodiment, because the function of foregoingcontrol circuit 21, automatically remove above-mentioned prohibited mode in due course, thus can prevent to have set above-mentioned prohibited mode system's akinesia always, make the auto-unlocking of the passive gate access control system specially prepared move out of use defective.For example, because of even above-mentioned prohibited mode has been set in rainfall, at least this rain stop the back, through after the described stipulated time or the hand that detects the people near the time, owing to automatically terminated above-mentioned prohibited mode, thereby can not take place substantially to make the out of use defective of passive gate access control system because of the setting of prohibited mode.

Below, in conjunction with Fig. 5 to Fig. 9 the various forms of the arrangement of antennas of the control device of above-mentioned vehicle and shape etc. are described.

The transmittingantenna 32 of object detection device 30 and receivingantenna 33 also can be shown in Fig. 5 (a) arranged side by side being configured on the door handle like that, also can shown in Fig. 5 (b), dispose point-blank like that.

In addition, can shown in Fig. 5 (c), (d), be leg-of-mutton shape like that also.Like this, but the frequency band of the electric wave that broadening is received and dispatched can improve and survey degree of accuracy and signal processing efficiency, can in wider scope, (longer detection range) survey.

In addition, transmittingantenna 32 and receivingantenna 33 are for example such shown in Fig. 6 (a), are configured in the inner face of door handle, are preferably in the exterior side configuration wave absorber 50 of door handle.Such structure for example shown in Fig. 6 (b), can easily be set to the investigative range of object detection device 30 and is positioned at inner side from the outer position that is positioned at door handle.When the inner side that investigative range is set in place in the inboard of the outer position of door handle, only can prevent effectively because of near the people's that is positioned at door handle hand near exporting unnecessary detectable signal, cause the unfavorable condition of the invalid transmission of described initiating signal.

In addition, preferably, the investigative range of object detection device 30 is carried out following such configuration by transmittingantenna 32 and the allocation position of receivingantenna 33 or above-mentioned wave absorber 50 and the careful setting of state.Promptly, preferably the investigative range of object detection device 30 is configured to extend to from the inboard of door handle the side that the hand of vehicle user inserts, make that object detection device 30 can detect the hand of above-mentioned vehicle user before the hand near the vehicle user of door handle of wanting the actuating doors handle inserts the inboard of door handle.For example, under the situation that the hand of vehicle user inserts, the state (comprising the above-mentioned state that is displaced to) that extends to the top of the investigative range B of Fig. 6 (b) than the investigative range A of Fig. 6 (b) for good.Under such state, can detect the hand of the vehicle user of wanting the actuating doors handle faster and definitely, further improved reliability and response.

In addition, transmittingantenna 32 and receivingantenna 33 also can separate configuration arrive handle one side and door one side.For example, shown in Fig. 6 (c), transmittingantenna 32 is configured to the inboard of door handle, receivingantenna 33 is configured to surface with the inboard opposed door of door handle, also wave absorber 50 can be configured in outside one side of door handle.If be this structure, shown in Fig. 6 (b), can easily the investigative range that needs minimal area be set on the good position (position between handle and the door).In addition, owing to can suppress definitely the unwanted electric wave of handle outside radiation, thereby also can more easily be fit to the benchmark of electric wave method.

Next, Fig. 7 is the figure of the configuration example of the antenna of expression under the movable door handle situation etc.Door handle under this situation is installed on the recess that is formed on the door, is a kind ofly to be pulled upwardly by from below hand being inserted the type that door is opened again.Even such type also can be arranged on transmittingantenna 32 and receivingantenna 33 on the door handle, but in this case, shown in Fig. 7 (a), the top that transmittingantenna 32 and receivingantenna 33 are arranged in the above-mentioned recess gets final product.Like this, can easily set the good investigative range shown in Fig. 7 (b), can realize easily preventing that mistake from surveying, improving response, the unnecessary electric wave of elimination is launched the effect that this has been narrated.Also have in addition: the door handle of relatively displacement with between do not need to carry out distribution, the advantage easily that becomes of the distribution between eachantenna 32,33 and sensor circuit 31.In addition,sensor circuit 31 in this case can be configured to the bottom surface side of above-mentioned recess as shown in Figure 7.

Next, Fig. 8 is that explanation sends the transmitting antenna 23 of main body machine 20 of usefulness with initiating signal and theantenna 32,33 of object detection device 30 is configured on the door handle together, the figure of the embodiment that article detection device 30 is also used as the enabling signal generating apparatus of tire pressure warning system.

For example shown in Fig. 8 (a),, for example shown in Fig. 8 (b), then can set being arranged on the excellent communications scope of air pressure unit 60 (represented with dot-and-dash line in Fig. 1) the transmission initiating signal on the tire if transmitting antenna 23 is formulated on the door handle.And, also can be with the people's that detected by object detection device 30 hand as enabling signal, transmission is to the initiating signal (being low frequency signal in this case) of air pressure unit 60, will be based on the alarm output of necessity of barometric result by the air pressure alarm device 61 that is connected with control circuit 21 (represented with dot-and-dash line in Fig. 1).

Here, because air pressure unit 60 is started by receiving initiating signal, the response signal (air pressure unit response signal) of the tire pressure metering data in the time of will comprising this sends with wireless, thereby the receivingantenna 25 by this body 20 and receiving circuit 24 receive these response signals, and BeControlled circuit 21 reads.And, incontrol circuit 21, when the included barometric data of the response signal that is received when departing from the suitable scope that sets, then carry out control by the alarm of air pressure alarm device 61 output abnormality in tire air-pressure.Air pressure alarm device 61 is to show by warning and light or literal, or these combination circulates a notice of pressure abnormity to vehicle user, also can show no abnormal and unusual degree simultaneously.In addition, this air pressure alarm device 61 also can be by the panel board in the car etc. the flicker of light wait and report to the police, implement unusual circular, for example have a function of the warning that output just can hear outside car but the user outside car (for example, the actuating doors handle will be taken advantage of into the user in the vehicle) preferably had.

In addition, Fig. 8 (c) is the process flow diagram of the concrete control and treatment example of theexpression control circuit 21 of realizing this embodiment.Because this process flow diagram is that step S7～S9 is appended on the process flow diagram of foregoing Fig. 4, thereby step S1～S6 is identical with Fig. 4 (in Fig. 8 (c), has omitted step S1～S5).The step of being appended is described, step 7 continues the processing of foregoing step S6 (with reference to Fig. 4) and carries out for sending initiating signal to air pressure unit 60, receiving from the response signal of air pressure unit 60, the processing of reading up-to-date barometric data.Next, judge in step S8 whether the barometric data that read have departed from the proper range that sets in advance,, then enter into step S9, export foregoing abnormality alarm,, then finish the processing of a sequencer program if do not depart from if depart from.

According to this contents processing, under the state that door is locked and under normal mode, survey in one's hands by object detection device 30, the establishment of communicating by letter of portable machine 10 and main body machine 20, and check affirmation, carry out communicating by letter of main body machine 10 and air pressure unit 60 then, under the situation of pressure abnormity, carry out abnormal alarm.

Therefore, according to this mode, to open the door of executing the lock state the user who has carried supporting portable machine 10, when from car outside, hand being reached the door handle inboard, when carrying out auto-unlocking immediately, carry out the pressure abnormity of tire and judge, if unusually just carry out abnormal alarm thereafter.

Therefore, include enabling signal and generate the object detection device 30 of usefulness and the main body machine 20 ofcontrol circuit 21, can between passive gate access control system and tire pressure warning system, realize publicization can realizing the multifunction of vehicle with low cost.

In addition, compare, can obtain the sharp point that battery consumption is few, the misoperation of returning of electric wave is few with general tire pressure warning system in the past.This be because, tire pressure warning system in the past be in general the UHF frequency band that sends termly by the main body machine electric wave, air pressure unit 60 is moved, irrespectively regularly carry out pressure abnormity with user's behavior etc. and judge.Therefore,, also have the above-mentioned action of the tire pressure warning system of the transmitting-receiving that includes electric wave repeatedly, exist the problem of battery consumption even merely stop vehicle for a long time.In addition, owing to used the electric wave of the UHF frequency band that is easy to generate echo in the past, thereby might produce the air pressure unit action that makes other adjacent vehicles, mistake and will receive, can not correctly carry out the unfavorable condition that pressure abnormity is judged as the signal of own vehicle from the signal of the air pressure unit 60 of these other vehicles.But, if the structure of present embodiment, since only the user's who has carried machine hand near during near the investigative range the door handle, just will send and carry out pressure abnormity to the electric wave of air pressure unit 60 and judge, thereby the power consumption that pressure abnormity is judged is suppressed in the required Min..In addition, in the present embodiment since to the electric wave of the initiating signal of air pressure unit 60 for being difficult to echogenic LF frequency band, thereby it is very little that the possibility of above-mentioned unfavorable condition takes place.

In addition,, not only need each tire proloculum is carried out distribution, and also exist reliability problems owing to be in rugged environment because the antenna of tire pressure warning system in the past is arranged in the tire proloculum.But, if the structure of present embodiment since with antenna configurations on door handle, thereby just can reduce from being configured to antenna on the door handle to the distribution of the air pressure of the tire that can confirm front and back.And because door handle is better than the environment of tire proloculum, thereby fault is few, can improve the reliability of system.

Next, to be expression receive the figure of embodiment of receivingantenna 25 publicization of the main body machine 20 of usefulness with the receivingantenna 33 of object detection device 30 and response signal to Fig. 9.In Fig. 9 with symbol 70 represented be, with common receiving antenna 33 (25) optionally withsensor circuit 31 or receiving circuit 24 in either party duplexer of being connected, be that electromagnetic relay of being controlled bycontrol circuit 21 etc. constitutes.In addition, with symbol 71 represented be to be used for for different frequency band couplings being carried out the match circuit of conversion of signals.Such structure can be with publicization of receiving antenna, can cut down reducing cost and realizing miniaturization of number of components.

(the 2nd embodiment)

Below, in conjunction with Figure 10 and Figure 11 the 2nd embodiment is described.Present embodiment is the example of control device that applies the present invention to the passive gate access control system of buildings (for example dwelling house and office etc.).Figure 10 (a) and Figure 11 (a) are the front view of the door of buildings, and Figure 10 (b) and Figure 11 (b) are this sectional view, and Figure 11 (c) is this enlarged front view.In addition, use same-sign for the key element identical with the 1st embodiment, the repetitive description thereof will be omitted.

This routine circuit system structure and contents processing thereof also can be identical with the mode of the 1st embodiment of Fig. 1～shown in Figure 4.And the configuration of each key element etc. for example also can be carried out as described below.

At first, under the situation of the door handle of the stripe shape shown in Figure 10 (a), for example, the transmittingantenna 32 of object detection device 30 and receivingantenna 33 as the simple stripe shape corresponding with door handle, are disposed each key element like that shown in Figure 10 (b).Promptly, with the radio-cell 80 of doorlock driving device 1, main body machine 20 andcontrol circuit 21, and thesensor circuit 31 of object detection device 30 be configured in the door handle, the transmittingantenna 32 of object detection device 30 is configured in the inner face of door handle, the receivingantenna 33 of object detection device 30 is configured on the surface location with the opposed door of the inner face of this door handle.Here, radio-cell 80 is the unit of thetranstation mission circuit 22, transmitting antenna 23, receiving circuit 24 and the receivingantenna 25 that comprise main body machine 20.

Next, under the situation of the door handle of the knob-style shown in Figure 11 (a), for example, the transmittingantenna 32 of object detection device 30 and receivingantenna 33 formed the shape of the semicircle shape corresponding with door handle, shown in Figure 11 (b), (c), dispose each key element like that.Promptly, with the radio-cell 80 of doorlock driving device 1, main body machine 20 andcontrol circuit 21, and thesensor circuit 31 of object detection device 30 be configured in the door, the transmittingantenna 32 of object detection device 30 is configured in a surface (along the position of the first half of door handle), the receivingantenna 33 of object detection device 30 is configured in a surface (along the position of the latter half of door handle).

If adopt such structure,, also can obtain the various effects identical with the 1st embodiment even in the passive gate access control system of buildings.In addition,, also can convert source power supply to assigned voltage and use, also can use the internal battery of battery etc. as the power supply of this routine system.In any case, realize saving electric energy, under the situation of using source power supply, can suppress the increase that the awaiting electric energy of family etc. consumes, for example can guarantee to prolong the life-span of changing battery using under the situation of battery etc. by using the present invention.

In addition, the present invention is not limited to the foregoing description, and various distortion and mode can be arranged.

For example, in the above-described embodiments, just to the unlocking action of the door of vehicle and buildings for concrete example, but the present invention is not limited to unblanking etc. of door, and various controlling object and control content can be arranged.For example, the enabling signal generating apparatus that automatically locks and move as the passive gate access control system also can use object detection device of the present invention.In addition, also can be applied to survey switch near the afterbody luggage case of vehicle with the user's of handle hand, open or close automatically the afterbody luggage case etc. of vehicle automatically by object detection device of the present invention.In addition, except vehicle, also can be applied to the auto-unlocking etc. of the door of taking advantage of carrier of for example boats and ships or baby plane etc.

In addition, in described embodiment, illustration survey the situation of people's hand, but the characteristic by change decision circuitry portion (for example, the characteristic of bandpass filter or comparer), the material (for example raindrop) beyond people's the hand can be come as certain objects (detected object), with other materials differences and survey.

In addition, also can make each antenna of object detection device or main body machine as the position of being installed and other article and (for example be fixed on the installation position by metal or electroconductive resin by being pressed into or being screwed into screw etc., inboard or the surface of door handle), form but also can for example insert in resinous door handle and the door.In addition, also can for example will do in resinous door handle and door by so-called 2 kinds of colors antenna that form, that electroconductive resin constituted.In addition, also can be by forming antenna at electrodeposited resin.

In addition, the control content of main body machine is not limited to Fig. 4 and Fig. 8 (c) is illustrated.For example, in the process flow diagram of Fig. 4, also can delete step S1.But, when deletion step S1, even door is a unlocked conditions, also be only limited to common pattern, surveying when in one's hands, all will carry out at every turn and carry communicating by letter of machine, the possibility that just has execution lavishly to unblank to control when the judgment processing of S1 in steps, just can be avoided such unfavorable condition.In addition, the setting that also can not carry out foregoing prohibited mode is handled, the step S3 of the process flow diagram of deletion Fig. 4.This is because the set-up function of prohibited mode, be just in case continuously mistake detect under the situation of raindrop etc. for the sake of security function.

In addition, in the embodiment previously described, make passive gate access control system and common main body machine and object detection device, realize the abnormal alarm function of the air pressure of tire by the processing (Fig. 8 (c)) of handling one with the auto-unlocking of passive gate access control system, but also can also can realize by realizing individually for main body machine or object detection device separately with the passive gate access control system by other processing of branch (with the irrelevant processing of the action of gate control system) of using same main body machine.For example, when just generating, also object detection device of the present invention can be installed in the hand of surveying the user on the door handle for the enabling signal of the abnormal alarm function of tire pressure.In addition, also can be for example for when detecting people's hand, the just contents processing of the step S7 to S9 of execution graph 8 (c) unconditionally.But, when being that Fig. 8 (c) contents processing illustrated, foregoing embodiment is when (with the combined processing of the processing of Fig. 4), door is for by the state locked and in normal mode, only at the user's who has carried the supporting machine that carries hand near during door handle, the abnormal alarm function of tire pressure just begins to start.Therefore, carry out radio communication with air pressure unit with required minimal frequency as far as possible, on the electric energy this point of conserve batteries, the contents processing of foregoing embodiment is favourable.

In addition, request signal of the present invention is not limited to make the initiating signal from sleep state (the WAIT state of microcomputer) starting such as the machine of carrying, also can be for the machine that carries and the air pressure unit that are in starting state (holding state that comprises microcomputer), only require the signal of the response signal that sends regulation.In addition, the wireless frequency of this request signal is not limited to the LF frequency band, also can be other frequency band (for example UHF frequency band).But the LF frequency band has the few advantage of the echo of electric wave, and electric energy transmits and also can carry out more effectively.

In addition, in request signal, also can include some intrinsic coding (, preferably not being the authentication coding that waits in order to unblank) from the viewpoint of delinquency prevention.For example also can be in the gate control system of vehicle, the situation of using under the condition owing near other vehicles that have many gate control systems that disposed same kind probably appearing at simultaneously, under this kind situation, in order to discern other vehicle, also can make the machine of carrying behind the request signal that the main body machine that receives other vehicles is sent, do not send the response signal comprise the authentication coding at once, carrying out basic last time of the complex response signal of checking affirmation of above-mentioned intrinsic coding and make in carrying machine.

In addition, in Fig. 9, represented example, but, can constitute the transmitting antenna of main body machine and the transmitting antenna of object detection device by shared antenna as long as problem can not take place the difference of service band etc. with publicization of receiving antenna.In addition, according to circumstances, also can be with receiving antenna and transmitting antenna both sides sharing.In this case, antenna is two kinds on the whole, can reach suitable simplification.

In addition, in Fig. 8 (a), represented that also transmitting antenna with the main body machine is arranged on the example on the door handle, but also can be arranged on the door handle the receiving antenna of main body machine.

As mentioned above, according to the present invention, can provide a kind of technology of using pulse radar, in action Reliability and response and to the configuration (superiority at aspects such as size and designs) of vehicle etc. Etc. the aspect outstanding, than the object detection device of in the past pulse radar consume little power, and Use the good control device (control device of passive gate access control system etc.) of this device.

As the possibility of utilizing on the industry, object detection device of the present invention for example is fit to join very much Put taking advantage of on the carrier, will approach the opening/closing portion (door and afterbody boot etc.) of taking advantage of carrier at vehicle etc. The purposes (example surveyed as certain objects of the hand of vehicle user of handle (knop) The enabling signal generating apparatus such as passive gate access control system such as vehicle), maybe will possess near building The user's of the building of the handle of building open/close section (door and switch etc.) hand is as described specific (for example the enabling signal of the passive gate access control system of building generates the purposes that object is surveyed With). In addition, also be very suitable for tire pressure monitoring system.

Because be to take advantage of carrier, can be suitable for land, ocean, aviation and no matter be two-wheeled, three-wheel, Four-wheel or multiwheel vehicle are all applicable.

In addition, aspect building, also can be widely applicable for general building, office building, live Residence, villa, restaurant, warehouse, exhibition room, storehouse, air-raid dugout, sanctuary etc.

And control device of the present invention is to be equipped in the passive gate inhibition who takes advantage of on carrier or the building to be The control device of system or alarming abnormality in tire air-pressure system etc. is taken advantage of carrier or building as approaching The user's who takes advantage of carrier or building of the door handle of opening/closing portion hand is surveyed as certain objects Device, have object detection device of the present invention, be fit to very much the spy with this object detection device Survey output as the action (auto-unlocking action or and alarming abnormality in tire air-pressure action) of system Enabling signal be used.

Claims (11)

1. an object detection device is used to survey certain objects with the approaching situation of specific velocity range, it is characterized in that having:

The probing wave dispensing device of pulsed radar and reflection wave receiving trap; With

In the signal that is received by described reflection wave receiving trap, when the amplitude level of the signal content of the frequency range of the translational speed scope that is positioned at corresponding certain objects is positioned at the corresponding specialized range of physical property with certain objects, the decision circuitry portion of output detectable signal;

The hand that described certain objects is behaved, the responsiveness scope of the hand that described specific velocity range is behaved;

Will be with being configured in the handle of taking advantage of carrier switching portion taken advantage of on the carrier approaching user's hand survey as described certain objects.

2. object detection device according to claim 1 is characterized in that,

The inside of surface that the transmitting antenna of described probing wave dispensing device, the receiving antenna that constitutes described reflection wave receiving trap be arranged on the inside of described handle, described handle, described switching portion or the surface of described switching portion will be constituted.

3. object detection device according to claim 1 is characterized in that,

To constitute the transmitting antenna of described probing wave dispensing device and constitute inside or the surface that a side in the receiving antenna of described reflection wave receiving trap is arranged on described handle, the opposing party is arranged on the inside or the surface of described switching portion.

4. according to any described object detection device in the claim 1 to 3, it is characterized in that,

With investigative range be configured in described relatively handle outer position and near inboard position.

5. according to any described object detection device in the claim 1 to 3, it is characterized in that,

Make investigative range extend to the inserting side of user's hand from the inboard of described handle, the user's who makes at the approaching described handle that will operate described handle hand was detected by described object detection device before the inboard of inserting described handle.

6. a kind of control device according to claim 1 is used to control the lock state of executing of the switching portion that takes advantage of carrier, it is characterized in that having:

Any described object detection device in the claim 1 to 5; With

The main body machine, it is configured in takes advantage of on the carrier, when having of described object detection device surveyed output signal, the request signal of the regulation of the machine that carries that the wireless transmission respective user is entrained, reception is to the described machine that carries response signal of carrying machine that should request signal, in the machine that the carries response signal of having confirmed to be received is on the basis of correct signal, carries out being in the control that the switching portion that takes advantage of carrier that executes the lock state unblanks

Described main body facility are useful on the main body machine transmitting antenna of wireless transmission described request signal and are used to receive the described main body machine receiving antenna that carries the response signal of machine.

7. control device according to claim 6 is characterized in that,

Described main body machine transmitting antenna and constitute the transmitting antenna and/or the described main body machine receiving antenna of described probing wave dispensing device and constitute the receiving antenna of described reflection wave receiving trap is made of shared antenna.

8. according to claim 6 or 7 described control device, it is characterized in that,

Described main body machine transmitting antenna and/or described main body machine receiving antenna are arranged on the inside of the surface of the inside of described handle, described handle, described switching portion or the surface of described switching portion.

9. a kind of control device according to claim 1 is used for when the lock state of executing of switching portion of carrier is taken advantage of in control, and the air pressure of taking advantage of the tire that carrier has is monitored control, it is characterized in that having:

Any described object detection device in the claim 1 to 5;

Air pressure unit is set on the described tire, and under the condition of the request signal that receives regulation, wireless transmission comprises the air pressure unit response signal of tire pressure metering data; With

The main body machine, be configured in and take advantage of on the carrier, when having of described object detection device surveyed output signal, the request signal of the regulation of the machine that carries that the wireless transmission respective user is entrained, reception is to the described machine that carries response signal of carrying machine that should request signal, in the machine that the carries response signal of having confirmed to be received is on the basis of correct signal, separate lock control to being in the switching portion that takes advantage of carrier that executes the lock state, the request signal of the corresponding described air pressure unit of while wireless transmission, reception is to described air pressure unit response signal that should request signal, when the included barometric data of the air pressure unit response signal that is received depart from the normal range of regulation, the alarm of control output abnormality in tire air-pressure

Described main body facility are useful on the main body machine transmitting antenna of wireless transmission described request signal and receive the described main body machine receiving antenna that carries the machine response signal or receive described air pressure unit response signal.

10. control device according to claim 9 is characterized in that,

Described main body machine transmitting antenna and constitute the transmitting antenna and/or the described main body machine receiving antenna of described probing wave dispensing device and constitute the receiving antenna of described reflection wave receiving trap is made of shared antenna.

11. according to claim 9 or 10 described control device, it is characterized in that,

Described main body machine transmitting antenna and/or described main body machine receiving antenna are arranged on the inside of the surface of the inside of described handle, described handle, described switching portion or the surface of described switching portion.

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