CN105489046A - Vehicle positioning method based on motion triggering, vehicle terminal, and positioning system - Google Patents
Vehicle positioning method based on motion triggering, vehicle terminal, and positioning system Download PDFInfo
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- CN105489046A CN105489046A CN201511030272.7A CN201511030272A CN105489046A CN 105489046 A CN105489046 A CN 105489046A CN 201511030272 A CN201511030272 A CN 201511030272A CN 105489046 A CN105489046 A CN 105489046A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
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Abstract
The invention provides a vehicle positioning method based on motion triggering, being applied to a vehicle positioning system. The positioning system includes a plurality of positioning base stations and at least one vehicle terminal arranged on the vehicle, The vehicle positioning method includes that after a motion sensor of a vehicle terminal detects that the vehicle carrying the vehicle terminal moves, the motion sensor emits interrupt signals; and the vehicle terminal controls a communication module to emit positioning signals based on the interrupt signals, so that the positioning base stations position the vehicle based on the positioning signals. According to the invention, through the adoption of low-power technology based on the motion sensor and combination with a motion processing, the power consumption is reduced and the application range is enlarged.
Description
Technical field
The invention belongs to intelligent transportation (IntelligentTransportationSystem is called for short ITS) field, be specifically related to a kind of vehicle positioning method based on motion triggers, car-mounted terminal and positioning system.
Background technology
Increasing along with vehicle, and parking lot is limited to soil or other factors, parking difficulty, difficult problem of stopping are more and more obvious.In this case, curb parking, parking stall is searched, and oppositely look into the application such as car and just occurred, these application all need to use wireless location technology.
And the wireless location technology of present stage is most based on car-mounted terminal, the restriction due to car-mounted terminal volume causes electricity lower.And in practical application scene, positioning function non real-time needs, but car-mounted terminal keeps duty to cause electric quantity consumption too fast in real time after locating area of entering, and seriously limits serviceable life, causes system to adapt to plurality of application scenes.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of vehicle positioning method based on motion triggers, the Based Intelligent Control positioning function opening time, decreases the duration, and reduces the power consumption of car-mounted terminal, improve positioning precision.
Based on a vehicle positioning method for motion triggers, be applied to Vehicle positioning system, described positioning system comprises a plurality of locating base station and at least one is arranged at car-mounted terminal on vehicle, and method comprises:
After the motion sensor senses of described car-mounted terminal changes to the state of motion of vehicle carrying described car-mounted terminal, send look-at-me;
Described car-mounted terminal controls communication module according to described look-at-me and sends positioning signal, locates the position of described vehicle to make described locating base station according to described positioning signal.
Further, described car-mounted terminal is board units, and described communication module is UWB module.
Further, after the motion sensor senses of described car-mounted terminal changes to the state of motion of vehicle carrying described car-mounted terminal, before sending look-at-me step, also comprise:
Forbid the receiving function of described communication module.
Further, described car-mounted terminal controls communication module according to described look-at-me and sends positioning signal and be specially:
Judge whether described look-at-me is dither signal, if described look-at-me is dither signal, then abandons described look-at-me; If described look-at-me is not dither signal, then wakes described car-mounted terminal up and enter duty and control communication module and send positioning signal.
Further, judge that whether described look-at-me is the concrete grammar of dither signal and is:
Judge whether described look-at-me is greater than pre-set threshold value, if be more than or equal to described pre-set threshold value, then judge that described look-at-me is not dither signal; If be less than described pre-set threshold value, then judge that described look-at-me is dither signal.
Further, stating motion sensor is acceleration transducer, and state of motion of vehicle changes and refers to that the car speed recorded changes, and described pre-set threshold value is more than or equal to 20mg/LSB, is less than 150mg/LSB.
Further, wake described car-mounted terminal described in up to enter duty and control communication module and send positioning signal and be specially:
Wake described car-mounted terminal up enter duty and maintain Preset Time by preset rules;
The multiple positioning signal of described communication module sequential filming is controlled in Preset Time.
Further, described preset rules is specially:
Again do not receive look-at-me in first Preset Time after signal wakes up if be interrupted, then described first Preset Time is Preset Time;
Again look-at-me is received in first Preset Time after signal wakes up if be interrupted, then maintenance first Preset Time from a look-at-me after receiving, if again receive look-at-me in rear one first Preset Time, then again maintain the first Preset Time until do not receive look-at-me in the first Preset Time from receiving last look-at-me, described Preset Time from receive wake car-mounted terminal up look-at-me, to last first Preset Time terminates.
Further, described in Preset Time, control the multiple positioning signal step of described communication module sequential filming after also comprise:
Close the processor crystal oscillator of described car-mounted terminal, the transmitting of communication close module is correlated with I/O interface.
On the other hand, present invention also offers a kind of car-mounted terminal based on motion triggers, comprise motion sensor and communication module, wherein: described motion sensor for detect carry described car-mounted terminal vehicle movement after, send look-at-me; Described communication module is used for sending positioning signal according to described look-at-me, locates the position of described vehicle to make locating base station according to described positioning signal.
Again on the one hand, present invention also offers a kind of Vehicle positioning system based on motion triggers, comprise at least one car-mounted terminal as above, a plurality of locating base station.
Adopt the above-mentioned Low-power Technology based on motion sensor, in conjunction with motion processing algorithms, reduce power consumption, expanding can range of application.Further communication module adopts UWB module, positioning precision existingly relative to GPS, WIFI etc. can be significantly improved, can reach 10CM.Further, when dormancy, the crystal oscillator of closing process device further can reduce the power consumption of car-mounted terminal.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention 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 of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The process flow diagram of a kind of vehicle positioning method based on motion triggers that Fig. 1 provides for the embodiment of the present invention;
Another process flow diagram based on the vehicle positioning method of motion triggers that Fig. 2 provides for the embodiment of the present invention;
The module diagram of a kind of car-mounted terminal based on motion triggers that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1, a kind of vehicle positioning method based on motion triggers of the present invention as shown in Figure 1, be applied to Vehicle positioning system, described positioning system comprises a plurality of interval and is laid in the locating base station of locating area and at least one is arranged at car-mounted terminal on vehicle, wherein car-mounted terminal comprises motion sensor, communication module and processor, and method comprises:
Step 101: after the motion sensor senses of described car-mounted terminal changes to the state of motion of vehicle carrying described car-mounted terminal, send look-at-me;
Motion sensor in understandable car-mounted terminal is acceleration transducer, car-mounted terminal is arranged on vehicle, when the motion state change of vehicle as vehicle launch, when stopping or turning, acceleration transducer can detect that state of motion of vehicle changes and then produces a look-at-me and send to the processor of car-mounted terminal.
Step 102: described car-mounted terminal controls communication module according to described look-at-me and sends positioning signal, locates the position of described vehicle to make described locating base station according to described positioning signal.
Concrete, the processor of car-mounted terminal judges after receiving this look-at-me whether this look-at-me is dither signal, if look-at-me is dither signal, then abandons this look-at-me as shown in Figure 2; If look-at-me is not dither signal, then wake up process device enters duty and controls communication module and sends positioning signal.
Further judge look-at-me be whether the concrete grammar of dither signal for judge whether described look-at-me is greater than pre-set threshold value, if be more than or equal to described pre-set threshold value, then judge that described look-at-me is not dither signal; If be less than described pre-set threshold value, then judge that described look-at-me is dither signal.Due in actual environment, the pre-set threshold value of acceleration transducer is difficult to the real-time state showing car-mounted terminal: it is too low that pre-set threshold value is arranged, and easy false wake-up, namely also can produce look-at-me to car-mounted terminal under static position; Such as, and if setting is too high, needs very large vibration, tag removal be got off and could produce look-at-me.Obviously too low pre-set threshold value or too high pre-set threshold value all do not meet actual application scenarios.Therefore in the present embodiment, preferred pre-set threshold value is more than or equal to 20mg/LSB, is less than 150mg/LSB, further, the pre-set threshold value adopted in the present embodiment is 46.87mg/LSB.
Needs illustrate, lower in order to ensure the energy consumption of car-mounted terminal, therefore also comprise the receiving function forbidding described communication module before step 1.
Wherein locating base station can adopt TDOA algorithm according to the position of positioning signal positioned vehicle, and TOA algorithm or fingerprint location method, above-mentioned algorithm is prior art, is not specifically limited at this.
Adopt the above-mentioned Low-power Technology based on motion sensor, in conjunction with motion processing algorithms, reduce power consumption, expanding can range of application.
Embodiment 2, on the basis of embodiment 1, wake described car-mounted terminal in the present embodiment up and enter duty and control communication module and send positioning signal and be specially:
Wake described car-mounted terminal up enter duty and maintain Preset Time by preset rules;
The multiple positioning signal of described communication module sequential filming is controlled in Preset Time.
Wherein preset rules is, again do not receive look-at-me in the first Preset Time after signal wakes up if be interrupted, then described first Preset Time is Preset Time.
Illustrate, the first Preset Time is 60S, and does not again receive look-at-me at 60S, then after being interrupted signal and waking up, send multiple positioning signal continuously in 60S.
Again look-at-me is received in first Preset Time after signal wakes up if be interrupted, then maintenance first Preset Time from a look-at-me after receiving, if again receive look-at-me in rear one first Preset Time, then again maintain the first Preset Time until do not receive look-at-me in the first Preset Time from receiving last look-at-me, described Preset Time from receive wake car-mounted terminal up look-at-me, to last first Preset Time terminates.
Illustrate, first Preset Time is 60S, if again receive look-at-me at the 50S of first the first Preset Time, then from the 50S of the first Preset Time, extend 60S, if extend 60S within the 10th second, again receive look-at-me, then light from this time and extend 60S again, if do not receive look-at-me in the 60S again extended, then Preset Time is 50S+10S+60S=120S, and processor controls the multiple positioning signal of described communication module sequential filming in 120S.
In other embodiments, because the time interval between multiple positioning signal is identical, so the calculating of Preset Time can also be completed by the number counting positioning signal, as, additional count information in positioning signal, to arrange count information after signal wakes up be 120 being interrupted, and to launch after positioning signal-1 at every turn, when count information is 0, then illustrate that Preset Time terminates.Certain, when count information not yet returns 0, if again receive look-at-me, then again arranging count information is 120.In this embodiment, launch time namely first Preset Time of 120 positioning signals.
Easy understand, count information is also Preset Time in essence.The length of Preset Time can be arranged according to on-site actual situations, is not specifically limited at this.
Further, after the preset lime, also comprise the processor crystal oscillator of closing described car-mounted terminal, the communication of communication close module is correlated with I/O interface.Now only have motion sensor in running order in car-mounted terminal, the power consumption of whole car-mounted terminal can only have about 5uA.
Embodiment 3, on the basis of embodiment 1 and embodiment 2, car-mounted terminal is electronic tag, and communication module is UWB module.UWB module closes receiving function, and outside preset time range, keep the mode of deep sleep, and the power consumption under UWB module deep sleep mode only has 0.4uA.Effectively can reduce power consumption further.
In the present embodiment, communication module adopts UWB module, positioning precision existingly relative to GPS, WIFI etc. can be significantly improved, can reach 10CM.Further, when dormancy, the crystal oscillator of closing process device further can reduce the power consumption of car-mounted terminal.
Embodiment 4, the invention also discloses a kind of car-mounted terminal 1 based on motion triggers as shown in Figure 3, comprise motion sensor 12, communication module 13 and processor 11, wherein: described motion sensor 12 for detect carry described car-mounted terminal 1 vehicle movement after, send look-at-me; Described communication module 13, under the control of processor 11, sends positioning signal according to described look-at-me, locates the position of described vehicle to make locating base station according to described positioning signal.
Further, car-mounted terminal 1 is specially board units, and communication module 13 is UWB module.
More specifically, described processor 11 comprises judge module and Postponement module, and described judge module is for judging whether described look-at-me is dither signal, if described look-at-me is dither signal, then abandons described look-at-me; If described look-at-me is not dither signal, then wakes described board units up and enter duty and control communication module and send positioning signal.Postponement module is used for waking described board units up and enters duty and maintain Preset Time by preset rules, controls the multiple positioning signal of described communication module 13 sequential filming in Preset Time.Wherein the judgment mode of dither signal, preset rules are identical with embodiment 1-3, do not repeat them here.
Processor 11 also comprises closing module, and closing module is used for the crystal oscillator of processor of closing board units at the end of Preset Time, and the communication of communication close module 13 is correlated with I/O interface.
Embodiment 5, the invention also discloses a kind of Vehicle positioning system based on motion triggers, comprises at least one board units as described in Example 4, a plurality of locating base station.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (11)
1. based on a vehicle positioning method for motion triggers, be applied to Vehicle positioning system, described positioning system comprises a plurality of locating base station and at least one is arranged at car-mounted terminal on vehicle, and it is characterized in that, described method comprises:
After the motion sensor senses of described car-mounted terminal changes to the state of motion of vehicle carrying described car-mounted terminal, send look-at-me;
Described car-mounted terminal controls communication module according to described look-at-me and sends positioning signal, locates the position of described vehicle to make described locating base station according to described positioning signal.
2. vehicle positioning method according to claim 1, is characterized in that, described car-mounted terminal is board units, and described communication module is UWB module.
3. vehicle positioning method according to claim 1, is characterized in that, after the motion sensor senses of described car-mounted terminal changes to the state of motion of vehicle carrying described car-mounted terminal, before sending look-at-me step, also comprises:
Forbid the receiving function of described communication module.
4. the vehicle positioning method according to any one of claim 1-3, is characterized in that, described car-mounted terminal sends positioning signal according to described look-at-me control communication module and is specially:
Judge whether described look-at-me is dither signal, if described look-at-me is dither signal, then abandons described look-at-me; If described look-at-me is not dither signal, then wakes described car-mounted terminal up and enter duty and control communication module and send positioning signal.
5. vehicle positioning method according to claim 3, is characterized in that, judges that whether described look-at-me is the concrete grammar of dither signal and is:
Judge whether described look-at-me is greater than pre-set threshold value, if be more than or equal to described pre-set threshold value, then judge that described look-at-me is not dither signal; If be less than described pre-set threshold value, then judge that described look-at-me is dither signal.
6. vehicle positioning method according to claim 4, it is characterized in that, described motion sensor is acceleration transducer, and state of motion of vehicle changes and refers to that the car speed recorded changes, described pre-set threshold value is more than or equal to 20mg/LSB, is less than 150mg/LSB.
7. vehicle positioning method according to claim 4, is characterized in that, described in wake described car-mounted terminal up and enter duty and control communication module and send positioning signal and be specially:
Wake described car-mounted terminal up enter duty and maintain Preset Time by preset rules;
The multiple positioning signal of described communication module sequential filming is controlled in Preset Time.
8. vehicle positioning method according to claim 6, is characterized in that, described preset rules is specially:
Again do not receive look-at-me in first Preset Time after signal wakes up if be interrupted, then described first Preset Time is Preset Time;
Again look-at-me is received in first Preset Time after signal wakes up if be interrupted, then maintenance first Preset Time from a look-at-me after receiving, if again receive look-at-me in rear one first Preset Time, then again maintain the first Preset Time until do not receive look-at-me in the first Preset Time from receiving last look-at-me, described Preset Time from receive wake car-mounted terminal up look-at-me, to last first Preset Time terminates.
9. vehicle positioning method according to claim 6, is characterized in that, described in Preset Time, control the multiple positioning signal step of described communication module sequential filming after also comprise:
Close the processor crystal oscillator of described car-mounted terminal, the communication of closing described communication module is correlated with I/O interface.
10. based on a car-mounted terminal for motion triggers, it is characterized in that, comprise motion sensor and communication module, wherein: described motion sensor for detect carry described car-mounted terminal vehicle movement after, send look-at-me; Described communication module is used for sending positioning signal according to described look-at-me, locates the position of described vehicle to make locating base station according to described positioning signal.
11. 1 kinds, based on the Vehicle positioning system of motion triggers, is characterized in that, comprise at least one car-mounted terminal as claimed in claim 9, a plurality of locating base station.
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| CN201511030272.7A CN105489046B (en) | 2015-12-31 | 2015-12-31 | A kind of vehicle positioning method based on motion triggers, car-mounted terminal and alignment system |
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| CN201511030272.7A CN105489046B (en) | 2015-12-31 | 2015-12-31 | A kind of vehicle positioning method based on motion triggers, car-mounted terminal and alignment system |
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| CN109559393A (en) * | 2017-09-27 | 2019-04-02 | 中国电信股份有限公司 | On board unit awakening method, device and vehicle carried electronic label device |
| CN114390465A (en) * | 2020-10-19 | 2022-04-22 | 中移物联网有限公司 | Vehicle-mounted positioning terminal control method and device and electronic equipment |
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