Utility model content
Main purpose of the present utility model is to provide a kind of electric toothbrush with new brush-head pressure detection structure.
The utility model proposes a kind of electric toothbrush, including passive main body rack, it is arranged in the driving means on this main body rack, it is arranged in described main body rack one end the brush with this driving means assembly connection, described main body rack arranges a support shaft, described driving means is assemblied on described main body rack by described support shaft, and described driving means forms the lever construction with described support shaft as fulcrum with brush, described main body rack is provided with because of described brush by the difference that exerts a force make described driving means around described support shaft rotational angle is different and sensor that detected value is different.
By upper, described driving means forms the lever construction with described support shaft as fulcrum with brush, when described brush is applied in different pressures, according to lever principle, described driving means will produce different rotational angles around described support shaft, described sensor is thus made to produce different detected values, the pressure size judged suffered by brush is gone by the size of detected value produced by described sensor, this brush-head pressure detection structure feeds back the size of brush-head pressure by the change of described driving means displacement, it provide a kind of new brush-head pressure detection structure, its compact conformation, stability is high, cost of manufacture can also be substantially reduced simultaneously.
Preferably, described driving means is microseism motor.
Preferably, it is provided with metallic conductor in described driving means away from the side of described support shaft；
Described sensor is oppositely arranged with described metallic conductor, and it induces different electrical signals as different detected values from described metallic conductor different distance.
By upper, when described brush is applied in different pressures, according to lever principle, described metallic conductor will produce different rotational angles around described support shaft, and then change the distance between described metallic conductor and described sensor, on described sensor, different electrical signals is induced by the distance between described metallic conductor from described sensor is different, this different electrical signals is the different detected values that described sensor produces, the pressure size judged suffered by brush is gone by the size of detected value produced by described sensor, it provide a kind of new brush-head pressure detection structure, its compact conformation, stability is high, cost of manufacture can also be substantially reduced simultaneously.
Preferably, described sensor is inductance sensor.
By upper, when described brush is applied in different pressures, according to lever principle, described metallic conductor will produce different rotational angles around described support shaft, the most described metallic conductor moves relative to described inductance sensor, and according to electromagnetic induction principle, described inductance sensor will induce different electrical signals, this different electrical signals is the different detected values that described inductance sensor produces, and is gone the pressure size judged suffered by brush by the size of detected value produced by described inductance sensor.
Preferably, described inductance sensor includes that this inductance coil planographic is on the circuit main board of described electric toothbrush with described metallic conductor just to the inductance coil arranged.
Preferably, being provided with metal framework in the outside of described driving means, described metallic conductor is wholely set with this metal framework.
By upper, owing to described metallic conductor is wholely set with this metal framework, it is possible to simplify the structure of electric toothbrush so that it is structure is compacter.
Preferably, described circuit main board is arranged on the side in contrast to described driving means of described main body rack, offers a through hole being oppositely arranged with described inductance coil on described main body rack.
By upper, described through hole predominantly inductance coil is stepped down, it is to avoid the induced signal between described metal framework and inductance coil is blocked and disturbs, and then guarantees the Detection results of inductance sensor.
Preferably, described main body rack is provided with to limit the up/down stopping means of the rotational angle range of described driving means.
Preferably, described main body rack is provided with an opening up stopper slot, it is provided with bottom in the side away from described brush of described driving means and there is the limiting section of flange, in described limiting section stretches into described stopper slot and it is locked on the opening part of described stopper slot by described flange, described stopper slot and limiting section constitutes described position limit device.
By upper, when described metal framework is moved upwardly by under driving means drives, when described flange is locked on the opening part of stopper slot, stopping is moved up by described metal framework, thus limit the moving range of described metal framework, and then limit the moving range of described brush to guarantee that described brush moves the most in the reasonable scope.
Preferably, receive in described stopper slot equipped with the spring abutted against with described flange, described spring constitute described lower caging device.
By upper, first, described spring can limit the downward range of motion of limiting section as lower caging device, and then is limited in the reasonable scope by limiting section；Second, when limiting section moves to lower position, spring applies a restoring force to this limiting section, and limiting section can be easier to reset under this restoring force effect；3rd, it is applied to the deformation power of the lever construction being made up of microseism motor when regulation brush is placed in following dead-center position by the rubber ring at brush, makes aforesaid lever structure be in stress balance position.
Preferably, described limiting section is integrally formed below described flange the projection axially extended down along described flange, and described projection stretches in described spring.
By upper, owing to described projection stretches in described spring, described spring preferably can be positioned by described projection, it is ensured that described spring and the connective stability of limiting section.
Preferably, described main body rack is provided with to limit described limiting section and is directed away from the metal framework stopping means of described stopper slot one side shifting.
By upper, when described brush is in this dead-center position, described metal framework stopping means can stop described metal framework the most mobile, makes described metal framework be maintained at dead-center position.
Preferably, in being provided with sealing block near the side of described brush on described main body rack, the power transmission shaft of described microseism motor run through after this sealing block with described brush assembly connection.
By upper, described sealing block prevents from electric toothbrush from use intaking causing described microseism motor damage.
Detailed description of the invention
Referring to Fig. 1～Figure 17, electric toothbrush described in the utility model is described in detail.
As shown in FIG. 1 to 3, electric toothbrush generally includes brush holder 1 and the brush 2 of split type setting.Brush holder 1 has a housing 11, the axially arranged main body rack 12 along brush holder 1 it is provided with in this housing 11, this main body rack 12 is integrally formed multiple separating part, these multiple separating parts is divided into the battery case 111 of battery to be installed and in order to receive the driving means of dress brush 2 and to provide the cavity 112 of activity space for this driving means by the space that housing 11 is surrounded.The circuit main board 14 of electric toothbrush is installed in the side in contrast to battery case 111 and cavity 112 of main body rack 12, described circuit main board 14 is provided with the main control unit 711 of electric toothbrush, and the most connected drive part, pressure detecting part, PH detection part, on-off circuit and communication unit grade, physical circuit will be described in detail later.It is packaged with, in aforementioned battery case 111, the supply line electrically connected with this circuit main board 14；The charging base 113 being charged with the battery thinking in battery case 111 it is provided with in the end away from brush 2 of housing 11.Multiple buttons 114 of the on/off state and mode of operation that are provided with to control electric toothbrush on the lower surface of housing 11 form described on-off circuit 715, the button one_to_one corresponding that these multiple buttons 114 and circuit main board 14 are arranged.
In the present embodiment, drive part includes electric-motor drive unit 720, and connected microseism motor 13 is constituted.As shown in Figure 8, described electric-motor drive unit 720 uses and includes that the motor drive ic that model is DRV8XXX series realizes, the signal input port (nSLEEP, IN1, IN2) of this chip is connected with described main control unit 711, output port (OUT1, OUT2) connects described microseism motor 13, in figure, two interfaces of J6, J7 are the interface knowing in motor 13 by force, electric-motor drive unit 720 is for driving microseism motor 13 to work according to the control instruction of main control unit 711, and described control instruction includes rotary speed instruction and dormancy instruction.It is separately installed with the metal framework 131 paralleled in the both sides up and down with microseism motor 13 in the both sides up and down of this microseism motor 13.Fix a support shaft 121 in the front end (i.e. near one end of brush 2) of main body rack 12, this support shaft 121 with through the length direction of brush holder 1 and the plane at its above-below direction place perpendicular (i.e. support shaft 121 is along the left and right directions setting shown in Fig. 3).Aforementioned metal framework 131 is rotationally connected with this support shaft 121, makes the rotation that the microseism motor 13 being fixed on this metal framework 131 can produce in small angle range relative to main body rack 12.It is close to support shaft 121 in the front end of main body rack 12 and is fixed with sealing block 122, the power transmission shaft 132 of microseism motor 13 sequentially passes through sealing block 122, housing 11 front side from this housing 11 along its length and stretches out, and brush 2 is generally inserted on the aforementioned extension of power transmission shaft 132.Generally offer the hole stretched out for power transmission shaft 132 in the front side of housing 11, sealing block 122 is main in order to seal this hole, prevents electric toothbrush from use intaking and causes microseism motor 13 to damage.Describe in conjunction with aforementioned structure and with reference to Fig. 3 and Fig. 4 it can be seen that microseism motor 13 and brush 2 define the lever construction with support shaft 121 as fulcrum.
Main body rack 12 is provided with an opening up stopper slot 123 near its rear end in abovementioned cavity 112, receives in this stopper slot 123 and fill a spring 124.As shown in Figure 3 and Figure 4, metal framework 131 is mainly made up of the U-frame frame that two openings are opposite, at the open rearward end of the two U-frame frame, it is integrally formed the length direction along brush holder 1 respectively extend backwards and be close to the connecting portion 131a being set together, in order to the U-shaped metal framework that conveniently will be located in downside described below is defined as lower metal framework 131b.Arranging an entirety in the rear end (i.e. away from the side of brush 2) of connecting portion 131a is column the limiting section 133 arranged down, is integrally formed a flange 133a in the bottom of this limiting section 133 and is positioned at the protruding 133b extended the most down below this flange 133a and along it.The bottom of limiting section 133 is stretched in stopper slot 123, wherein, in flange 133a is placed in stopper slot 123 and abuts against with spring 124, and protruding 133b stretches in spring 124.When metal framework 131 is moved upwardly by under microseism motor 13 drives, when flange 133a is locked on the opening part of stopper slot 123, metal framework 131 stops moving up.Position limit device described in the utility model is constituted by aforementioned stopper slot 123 and limiting section 133, lower caging device described in the utility model is constituted by spring 124, this spring 124 mainly has the effect that first, the downward range of motion of limiting section 133 can be limited as lower caging device, and then limiting section 133 is limited in the reasonable scope；Second, when user applies different pressures to brush 2, according to lever principle, limiting section 133 will move downwardly to diverse location, then spring 124 will apply a restoring force to this limiting section 133, it can be ensured that limiting section 133 can be reset at following defined dead-center position every time smoothly, so, ensure that the mobile route of metal framework 131, make the displacement of limiting section 133 and user pressure applied form a linear relationship；3rd, it is applied to the deformation power of the lever construction being made up of microseism motor when regulation brush 2 is placed in following dead-center position by the rubber ring at brush, makes aforesaid lever structure be in stress balance position.
It addition, the rear upper side in abovementioned cavity 112 arranges a planar portions 125 on main body rack 12, this planar portions 125 just to setting, is constituted described in the utility model metal framework stopping means by this planar portions 125 with aforementioned stopper slot 123.In this utility model, as shown in Figure 3 and Figure 4, jointly and brush 2 defines the lever construction with support shaft 121 as fulcrum for metal framework 131, the microseism motor 13 being arranged on this metal framework 131 and aforementioned limiting section 133, when brush 2 up/down moves, according to lever principle, metal framework 131, the microseism motor 13 being arranged on this metal framework 131 and aforementioned limiting section 133 then downwards/move up.Metal framework 131 when electric toothbrush is in this utility model unused state, the microseism motor 13 being arranged on this metal framework 131 and the natural place residing for aforementioned limiting section 133 are defined as dead-center position, when brush 2 is in this dead-center position, metal framework 131 will pop up under spring 124 deformation force effect, aforesaid plane portion 125 can stop metal framework 131 the most mobile, makes metal framework 131 be maintained at dead-center position by the restriction of this planar portions 125.
In this utility model, pressure detecting portion demultiplexing is in detecting relative to the displacement of inductance coil 719 above-mentioned metal framework 131b, to determine the dynamics of brushing teeth.The detailed description of the invention of pressure detecting part is as follows: be provided with inductance coil 719 as shown in Figure 7 and connected faradism inductance value digital converter 718 on circuit main board 14, wherein, inductance coil 719 be located on circuit main board 14 and with aforementioned lower metal framework 131b be positioned at the part below microseism motor 13 just to setting, a diameter of 0.3mm of inductance coil 719, the number of turn is 40.Being shown by the experimental data in the design phase, when using the inductance coil 719 of above-mentioned diameter and the number of turn, its data gathered are most sensitive, and data variation amount is maximum.Shown in table 1 specific as follows, transverse axis represents that the dynamics of brushing teeth, vertical coordinate represent five kinds of brushing mode.
Table 1
As shown in Fig. 3～Fig. 5, main body rack 12 offers the through hole 126 being oppositely arranged with inductance coil 719, this through hole 126 predominantly inductance coil 719 is stepped down, avoid the induced signal between lower metal framework 131b and inductance coil 719 blocked and interference, and then guarantee the Detection results of inductance sensor.In this utility model, metallic conductor is constituted by lower metal framework 131b, inductance coil 719 mainly senses because of the change in value of the inductive sensor caused by the change in displacement of lower metal framework 131b, owing to inductance coil 719 is used for detecting the change in displacement of the lower metal framework 131b arranged near downside rather than change in displacement at limiting section 133 or connecting portion 131a, the displacement range that inductance coil 719 is detected can be shortened, so can reduce the parameter to inductance coil 719 (including the number of turn and the number of plies) requirement, and then reduce the size of required inductance coil 719.Lower metal framework 131b microseism motor 13 drive under along close/away from the direction reciprocating movement of inductance coil 719, distance between this lower metal framework 131b and inductance coil 719 changes, the change in value of inductive sensor will be produced on inductance coil 719 because the distance between both changes, after this change in value is identified conversion by faradism inductance value digital converter 718, send to main control unit 711, as different detected values, received data is reflected that electric toothbrush user is applied to the pressure of brush 2 by main control unit 711, and then reflect dynamics size of brushing teeth.As it is shown in figure 9, the chip that described faradism inductance value digital converter 718 uses model to be LDC1000 realizes,
The present embodiment use inductance sensor realize being applied to the detection of brush 2 pressure for electric toothbrush user, it addition, may be used without other modes.Such as inductance sensor being replaced with infrared sensor, launch infrared ray by infrared sensor, the infra-red intensity reflected by lower metal framework 131b according to infrared ray judges distance, thus realizes the detection of dynamics of brushing teeth.When using infrared sensor, being not limited to metal framework, any material that can hinder infrared ray all can realize.
Or, capacitance sensor also can be used to realize, such as, inductance coil 719 is replaced with capacitance sensor fixed polar plate, lower metal framework 131b is replaced with capacitance sensor movable polar plate.Two pieces of pole plates electrically connect a signal processing chip jointly, when the relative position of two-plate changes, its interelectrode capacity changes and forms differential capacitor, and signal processing chip detects this capacitance variations and the change in voltage that causes, thus detects distance therebetween.
As it is shown on figure 3, form a recess on the upper surface of housing 11, in this recess, it is configured with PH detection part.As shown in Fig. 3 and Fig. 6 (A) and Fig. 6 (B), PH test section divides the PH probe 712 including the base 115 being arranged on recess front end and this base 115 and removably connecting, the shift knob 116 being arranged on recess rear end and this shift knob 116 to be formed at the switch enforcement division 117 of one.Wherein, base 115 is rotationally connected with housing 11 by rotating shaft 115a；PH pops one's head in the strip that 712 entirety are arranged in the length direction along brush holder 1, and its front end is removably connected by the formation of connect-disconnect structure and base 115, and its rear end abuts against with shift knob 116.The appearance of base 115, PH probe 712 and shift knob 116 is identical with housing 11.
The left and right sides of base 115 are formed side respectively approximate in inverted U-shaped locating slot 118, the switch enforcement division 117 also overall strip arranged in the length direction along brush holder 1, a pair linking arm 119 towards front upper place projection it is symmetrically formed, in the front end of this pair linking arm 119 is placed in aforementioned a pair locating slot 118 and both formation are rotationally connected in the front end of this switch enforcement division 117.The left and right sides wall of recess is also symmetrically formed a pair first screens and the second screens, and both are along the orientated lengthwise setting of brush holder 1, wherein, the first screens is positioned at the second screens rear, the positions of the first screens correspondence PH probe 712 Guan Bi, the second screens correspondence PH is popped one's head in 712 open positions.Being integrally formed in the left and right sides of switch enforcement division 117 can be with aforementioned first screens and the fitting portion of the second screens tabling.Open PH pop one's head in 712 time, user pull switch button 116 forward makes switch enforcement division 117 move forward, until aforementioned fitting portion embeds in the second screens, in this process, linking arm 119 promotes base 115 and makes it be rotated up around rotating shaft 115a, makes PH probe 712 by jack-up and be rotated up opening.Close PH pop one's head in 712 time, user pulls back shift knob 116, switch enforcement division 117 is made to be moved rearwards by, until aforementioned fitting portion embeds in the first screens, in this process, linking arm 119 pulls base 115 and makes it rotate down around rotating shaft 115a, makes PH probe 712 rotate down, until the rear end of PH probe 712 contacts with shift knob 116 and together with being connected to.
It addition, be additionally provided with pair of contact 115b in the front end of base 115, being provided with the supporting contact of a pair matched with this pair of contact 115b on sealing block 122 shown in Fig. 3 and Fig. 5, this pair supporting contact electrically connects with aforementioned circuit mainboard 14.It is additionally provided with a Magnet, in just place being encapsulated a Hall switch with this Magnet in aforementioned recess in the bottom of shift knob 116.When PH probe 712 is opened, shift knob 116 moves forward, make to be fixed on the Magnet bottom shift knob 116 to misplace with Hall switch, thus produce potential difference, then Hall switch will send a signal of telecommunication corresponding with PH probe 712 startup to the main control unit 711 of electric toothbrush.When PH probe 712 fully opens, PH pair of contact 115b of 712 front ends of popping one's head in electrically connect with the supporting contact on sealing block 122, then PH pops one's head in and 712 electrically connects with circuit main board 14 formation.Otherwise, during PH probe 712 closedown, PH probe 712 disconnects with the electrical connection of circuit main board 14；Meanwhile, shift knob 116 is moved rearwards by, and makes to be fixed on the Magnet bottom shift knob 116 and is directed at Hall switch, then Hall switch will send a signal of telecommunication corresponding with PH probe 712 closedown to the main control unit 711 of electric toothbrush.
Figure 10 show the circuit diagram of PH detection part in the present embodiment.Including the PH probe 712, amplifier unit 713 and the boosting unit 714 that are sequentially connected with.
In the present embodiment, described PH probe 712 includes an indicating electrode port and a reference electrode port.Its dead-center position of indicating electrode port is PH7, and its electrode potential is linear with the ionic activity in saliva, thus detects intraoral acid-base value.
Based on this, amplifier unit 713 includes the first discharge circuit and the second discharge circuit, and a port with PH probe is connected respectively, for providing high resistant environment to two ports of PH probe, constitutes double high impedance input circuit.Owing to PH probe internal resistance is the highest, therefore it is required that preamplifier has higher input impedance, thus strengthen capacity of resisting disturbance, it is to avoid other the signal of telecommunication produces impact to it.
Concrete, the first discharge circuit includes the circuit that model is TLV221 chip, and the reference electrode port that its positive input mouth IN+ and described PH pops one's head in is connected, and after reverse input end mouth IN-is connected with output port OUT, exports reference electrode data as outfan.
Second discharge circuit includes the circuit that model is TLV22541 chip, and after its first reverse input end mouth 3IN-and the first output port 3OUT connects, the indicating electrode port popped one's head in described PH is connected,
The outfan of the second positive input mouth 1IN+ and the first discharge circuit connects, and receives reference electrode data.
In the present embodiment circuit, on the circuit that two ports popped one's head in PH at first, second discharge circuit are connected, it is additionally provided with the electric capacity for filtering.
TLV22541 chip calculates the potential difference of indicating electrode and reference electrode, i.e. represent oral cavity acid-base value data, exported to main control unit 711 by output port, after the second reverse input end mouth 1IN-of i.e. TLV22541 chip described in Figure 10 and the second output port OUT connects, as outfan, output indicating electrode and the potential difference of reference electrode, represent that the data of oral cavity acid-base value are to main control unit 711.
Further, the voltage range gathered due to PH probe 712 is-500mv～500mv, and the voltage range that the master chip in main control unit 711 can read is at-500mv～657mv.Therefore, need to after the first positive input mouth connects and has two groups of RC circuit in parallel ground connection.The purpose that foregoing circuit connects is, as boosting unit 714, by this port " virtual earth ", in order to the potential difference of indicating electrode Yu reference electrode is carried out boosting process, in order to the master chip in main control unit 711 can read.
It addition, described first discharge circuit and the second discharge circuit also include the circuit being connected with power pack, because it belongs to common linking techniques, repeat no more.
Fig. 7 is the circuit theory diagrams of electric toothbrush, as shown in Figure 7, what the electric-control system of electric toothbrush had been addressed before mainly including is arranged on the main control unit 711 of circuit main board 14, and the pressure detecting part being connected with main control unit 711 respectively, the PH being sequentially connected with the most as mentioned above probe 712, amplifier unit 713 and boosting unit 714；PH detects part, the inductance coil 719 being sequentially connected with the most as mentioned above and faradism inductance value digital converter 718；Drive part, interconnective electric-motor drive unit 720 the most described above and microseism motor 13；On-off circuit 715.It addition, also include power supply unit 722, LED array 716 and the communication unit 717 being connected with main control unit 711.As shown in figure 11, the chip that the main control unit 711 in the present embodiment uses model to be N51822 realizes.
As shown in figure 12, power supply unit 722 includes that the charging being sequentially connected with receives circuit, and connected bleeder circuit and charging detecting circuit respectively.
The 7V voltage that described bleeder circuit is received for charging receives circuit transfers the 3V voltage needed for electric toothbrush inside and 5V voltage to.Described charging detecting circuit is used for judging when charging reception circuit is charged, export the notification being charged to main control unit 711, after main control unit 711 receives above-mentioned information, learn that electric toothbrush is charged, thus output order controls to close all functions, in case leak-stopping is electric.
As shown in figure 13, described charging receives the charging receptor realization that circuit includes that model is BQ5105xB.
As shown in figure 14, the output port that charging detecting circuit receives circuit with charging is connected, and when there being the signal of telecommunication to input, exports to main control unit 711 after the signal of telecommunication enters dividing potential drop.
As shown in figure 15,5V bleeder circuit includes that the chip that model is APW7137 realizes；As shown in figure 16,3V bleeder circuit includes that the chip that model is TPS7XX series realizes.
As shown in figure 17, communication unit 717 uses Bluetooth technology, after above-mentioned detected brushing pressure degrees of data and/or oral cavity acid-base value data are carried out Bluetooth modulation, exports to the intelligent mobile phone terminal of user, in order to user checks.
It addition, also include memory element (not shown), it is connected with described main control unit 711, for storing brushing pressure degrees of data and the oral cavity acid-base value data that main control unit 711 is received.
Describe the operation principle to electric toothbrush described in the utility model below in conjunction with said structure and circuit theory to easily describe.
When utilizing electric toothbrush to brush teeth, first user presses the start button on housing 11 surface makes microseism motor 13 start, and is applied to 2 one pressure of brush the most again, and this pressure contacts dynamics by control brush bristle and user dental surface.Aforementioned pressure causes brush 2 up/down to move, lower metal framework 131b up/down certainly will be made to move according to lever drive principle, the movement of this lower metal framework 131b makes the distance between itself and inductance coil change, and then produces different induction value on inductance coil 719.Aforementioned different induction value is identified by faradism inductance value digital converter 718 and changes into the receptible signal of main control unit 711 and transmit the signal to main control unit 711.Aforementioned signal is analyzed judging by main control unit 711, reminds user to adjust dynamics of brushing teeth if brush 2 pressure is improper.Alerting pattern can include voice or light flash etc., and corresponding also includes speaker or LED group, specifically repeat no more.
When the PH test section go-on-go utilizing electric toothbrush surveys intraoral acid-base value, user pull switch button 116 forward, then PH probe 712 is rotated up opening；When PH probe 712 fully opens, pair of contact 115b of PH probe 712 electrically connects with the supporting contact on sealing block 122, then PH probe 712 electrically connects with circuit main board 14 formation.Meanwhile, be fixed on the Magnet bottom shift knob 116 and misplace with Hall switch, then Hall switch will send a signal of telecommunication corresponding with PH probe 712 startup to the main control unit 711 of electric toothbrush.The information that PH probe 712 is detected passes sequentially through the analyzing and processing of amplifier unit 713 and boosting unit 714 and is eventually sent on main control unit 711, and this information is analyzed and provides related guidance according to this information to the mouth care of user by main control unit 711.It addition, main control unit 711 is additionally operable to control communication unit 717 by the intelligent terminal of the wireless output of data of described detection to user.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Such as, in the above-described embodiments, brush for electric toothbrush is operated by vibration under microseism motor 13 drives, it is oscillating mode electric toothbrush, but it being not limited to this, electric toothbrush can be also that rotation electric toothbrush, i.e. brush are operated by rotation.
The most such as, in the above-described embodiments, sensor is the inductance sensor including inductance coil, but is not limited to this, and described sensor can also be the one in pressure sensor/electrical distance sensor/range sensor etc..