A kind of Precise Position System based on super-broadband techTechnical field
The utility model relates to placement technology, refers to a kind of Precise Position System based on super-broadband tech especially.
Background technology
Along with the development of wireless communication technology, emerging radio network technique, such as WiFi, ZigBee, bluetooth and ultra broadband etc., be widely applied in office, family, factory etc.
Bluetooth technology is positioned by measure signal intensity, it is a kind of Radio Transmission Technology of short distance low-power consumption, at the bluetooth local area network access point that indoor location is suitable, network configuration is become the basic network connection mode based on multi-user, just can obtain the positional information of user, Bluetooth technology is mainly used in locates among a small circle, such as individual layer hall or warehouse.The advantage of bluetooth indoor positioning technologies is that equipment volume is little, be therefore easy to popularize, but the stability of Bluetooth system is slightly poor, is subject to noise jamming.
Wi-Fi technology and WLAN (WLAN), it is a kind of brand-new information acquisition platform, can realize complicated location on a large scale, monitoring and tracking task in application widely, and network node self poisoning is basis and the prerequisite of great majority application.Current popular Wi-Fi location is a kind of location solution of the IEEE802.11 of WLAN series standard, the mode that this system adopts experience test and signal propagation model to combine, be easy to install, need little base station, can adopt identical bottom wireless network architecture, system overall accuracy is high.But the cost of WI-FI technology is higher, and positioning precision is poor.
ZigBee is a kind of emerging short distance, low rate radio network technique, and it also may be used for indoor positioning between radio-frequency (RF) identification and bluetooth.It has oneself radio standard, can between thousands of small transducer mutual coordinating communication to realize location.These transducers only need little energy, and by radio wave, data are passed to another transducer from a transducer in the mode of relay, therefore their communication efficiency is very high.The most significant technical characterstic of ZigBee is its low-power consumption and low cost.But shortcoming is that positioning precision is poor.
Super-broadband tech a kind ofly completely newly, with conventional communication techniques has the New Communication Technology of huge difference.It does not need to use the carrier wave in traditional communication system, but transmits data by sending and receive the ultra-narrow pulse with below nanosecond or nanosecond, thus has the bandwidth of GHz magnitude.Ultra broadband can be used for indoor accurate position, and the position of such as battlefield soldier finds, robot motion follows the tracks of.
Relative to other several wireless location technologies, super-broadband tech has that penetration power is strong, low in energy consumption, anti-multipath is effective, fail safe is high, system complexity is low, can provide the advantages such as accurate positioning precision.Therefore, super-broadband tech is applicable to the locating and tracking being applied to stationary indoors or mobile object and people very much, and can provide very accurate positioning precision.
In view of this, a kind of navigation system based on super-broadband tech is provided to necessitate.
Utility model content
The utility model proposes a kind of Precise Position System based on super-broadband tech, the technical problems such as solve navigation system penetration power in prior art poor, power consumption is high, anti-footpath weak effect.
The technical solution of the utility model is achieved in that a kind of Precise Position System based on super-broadband tech, based on TDOA location and super-broadband tech basis, comprise CPU module, wake the wake module of CPU module through trigger event up, ultra-broadband signal is changed into digital signal and sends to the ultra-wide band radio-frequency module of CPU module, receive the Anneta module of the modulation signal that ultra-wide band radio-frequency module sends over
CPU module is in resting state, through wake module or ultra-wide band radio-frequency data bits reprocessing logic and event,
Anneta module receives Ultra-Wideband modulation signal, Ultra-Wideband modulation signal is sent to ultra-wide band radio-frequency module, ultra-wide band radio-frequency module converts modulation signal to digital signal and sends to CPU module, CPU module sends after digital signal is communicated to ultra-wide band radio-frequency module, ultra-wide band radio-frequency module converts digital signal to modulation signal and is sent to Anneta module, and Anneta module amplifies and sends modulation signal.
Further, wake module includes initiatively wake module, ultra-wide signal wake module and RTC wake module, initiatively wake module, ultra-wide signal wake module and RTC wake module respectively with CPU module communication.
Further, RTC wake module is that a constant time unit wakes a CPU module up.
Further, RTC wake module is connected by I2CI2C universal serial bus with CPU module.
Further, ultra-wide radio-frequency module is connected by SPI data/address bus with CPU module.
Further, Anneta module is connected by radio frequency line with ultra-wide band radio-frequency module.
Further, the power supply of power module management CPU module, ultra-wide radio-frequency module, RTC module and active wake module.
Compared with prior art, the wireless location system that the utility model provides, super-broadband tech has that penetration power is strong, low in energy consumption, anti-multipath is effective, fail safe is high, system complexity is low, can provide the advantages such as accurate positioning precision.Therefore, super-broadband tech is applicable to the locating and tracking being applied to stationary indoors or mobile object and people very much, and can provide very accurate positioning precision.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The TDOA location structure schematic diagram that Fig. 1 provides for the utility model;
Fig. 2 is the structural representation of the Precise Position System based on super-broadband tech.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
A kind of Precise Position System based on super-broadband tech that the utility model provides, is suitable for, in TDOA location technology, being combined with super-broadband tech by TDOA system, formed a kind of completely newly, have the New Communication Technology of huge difference with conventional communication techniques.It does not need to use the carrier wave in traditional communication system, but transmits data by sending and receive the ultra-narrow pulse with below nanosecond or nanosecond, thus has the bandwidth of GHz magnitude.TDOA location (Time Difference of Arrival is poor for the time of advent) addressed is a kind of method utilizing the time difference to position, and the signal sent by measurement and positioning label arrives the time of locating base station, can determine the distance in arriving signal source.As shown in Figure 1, TDOA navigation system utilizes signal source to arrive the distance of each locating base station, just can determine the position of signal.Arrived the time difference of each locating base station by comparison signal, just can make with locating base station is focus, and range difference is the hyperbola of major axis, and hyp intersection point is exactly the position of signal source.
As shown in Figure 2, based on a Precise Position System for super-broadband tech, comprise CPU module 3, wake the wake module of CPU module 3 through trigger event up, ultra-broadband signal is changed into digital signal and sends to the ultra-wide band radio-frequency module 2 of CPU module 3, receive the Anneta module 1 of the modulation signal that ultra-wide band radio-frequency module 2 sends over.CPU module 3 is in resting state, wakes reprocessing logic and event up through wake module or ultra-wide band radio-frequency module 2.Anneta module 1 receives, sends modulation signal, Anneta module 1 receives Ultra-Wideband modulation signal, Ultra-Wideband modulation signal is sent to ultra-wide band radio-frequency module 2, and ultra-wide band radio-frequency module 2 converts modulation signal to digital signal and sends to CPU module 3.
As a kind of embodiment, power management module 5 is by powered battery, and battery powered voltage is 3.6 volts.Battery powered Power convert becomes 3.3 volts to power to CPU module 3, RTC module 4 and active wake module by power management module 5.Battery powered Power convert becomes 1.8 volts to power to ultra-wide band radio-frequency module 2 by power management module 5.Battery powered Power convert becomes 5 volts to power to Anneta module 1 by power management module 5.Supply power voltage requires the utilization voltage for each functional module, and with energy-conservation and maintenance battery mentality of designing longer service time.
Initiatively wake module wakes CPU module 3 up, CPU module 3 receives wake request, according to the behavior of urgent trigger event, generate different emergency event message, be sent in the air by ultra-wide band radio-frequency module 2 and Anneta module 1, receive the laggard row of emergency event message by receiving station and further process.Initiatively wake module adopts the form of key-press matrix to be connected with central processing unit.
Wake module includes initiatively wake module, ultra-wide signal wake module and RTC wake module, initiatively wake module, ultra-wide signal wake module and RTC wake module respectively with CPU module 3 communication.
RTC wake module is that a constant time unit wakes a CPU module 3 up.RTC wake module is connected by I2C universal serial bus with CPU module 3.Usual native system is battery-powered, and power consumption must be little as much as possible, You Jiadi, after CPU module 3 processes event, and penetration depth resting state immediately.As a kind of embodiment, RTC module 4 will periodically wake CPU module 3 up every 3 seconds or special time, central processing unit is waken up reprocessing logic and event, generates framing signal message, is sent by ultra-wide band radio-frequency module 2 and Anneta module 1.Receive the laggard row of framing signal message by receiving station further to process.
Ultra-wide radio-frequency module is connected by SPI data/address bus with CPU module 3.Anneta module 1 is connected by radio frequency line with ultra-wide band radio-frequency module 2.Ultra-wide band radio-frequency module 2 receives ultra-broadband signal from Anneta module 1, through modulation /demodulation, changes into digital signal and sends to central processing unit process.Because ultra-wide band radio-frequency module 2 is in deep sleep, before sending to CPU module 3 message, ultra-wide band radio-frequency module 2 wakes CPU module 3 up by interruption.Ultra-wide band radio-frequency module 2, from CPU module 3 Received signal strength message, changes into wireless modulated signals through modulation /demodulation, sends to Anneta module 1 to process.
The power supply of power module management CPU module 3, ultra-wide band radio-frequency module 2, RTC module 4 and active wake module.Anneta module 1 receives the modulation signal that ultra-wide band radio-frequency module 2 sends, and is sent to aerial, receives the laggard row of modulation signal further process by receiving station by power amplifier after being amplified.
Anneta module 1 receives the aerial Ultra-Wideband modulation signal having other cell sites to send, and after the LNA of Anneta module 1 is amplified, gives ultra-wide band radio-frequency module 2 and processes.Anneta module 1 is connected by 50 Ohm radio frequency lines with ultra-wide band radio-frequency module 2.
CPU module 3 is nucleus modules of navigation system, and all logics and event are all processed by CPU module 3, are in deep sleep state in an idle state, can be energy-conservation.CPU module 3 can be waken up by interruption by active wake module, RTC module 4 and ultra-wide band radio-frequency module 2, and above-mentioned active wake module can be touched or key device, as the input part of operational order for hand.
In sum, the wireless location system that the utility model provides, navigation system periodically sends framing signal, and RTC module 4 shot timers wakes CPU module 3 up, as preferably, CPU module 3 judges the reason waken up, if RTC module 4 is waken up, then generates framing signal message, sent by ultra-wide band radio-frequency module 2, after being sent completely, penetration depth resting state immediately, and wait wakes up next time.If initiatively wake module wakes CPU module 3 immediately up, judge it is initiatively wake up through CPU module 3, CPU module 3 is immediately according to wake request, generate different emergency event message, be sent in the air by ultra-wide band radio-frequency module 2 and Anneta module 1, receive the laggard row of emergency event message by receiving station and further process.After being sent completely, penetration depth resting state immediately, waits for and waking up next time.Ultra-wide band radio-frequency module 2 receives the ultra-broadband signal message sended in the air, wakes CPU module 3 up, and CPU module 3 processes signal message.CPU module 3 is connected with RTC module 4, and CPU module 3 is connected by I2C universal serial bus with RTC module 4.CPU module 3 is connected by SPI data/address bus with ultra-wide band radio-frequency module 2.Based on the above-mentioned functions module of TDOA technology, have in conjunction with super-broadband tech that penetration power is strong, low in energy consumption, anti-multipath is effective, fail safe is high, system complexity is low, can provide the characteristics such as accurate positioning precision, the wireless location system that the utility model provides is that the development of the locating and tracking technology of stationary indoors or mobile object and people plays an important role.
These are only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.