CN108765959A - A kind of highway rear-end collision prevention guiding system and method based on wireless location velocity measuring technique - Google Patents
A kind of highway rear-end collision prevention guiding system and method based on wireless location velocity measuring technique Download PDFInfo
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- CN108765959A CN108765959A CN201810797741.5A CN201810797741A CN108765959A CN 108765959 A CN108765959 A CN 108765959A CN 201810797741 A CN201810797741 A CN 201810797741A CN 108765959 A CN108765959 A CN 108765959A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
- G08G1/012—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from other sources than vehicle or roadside beacons, e.g. mobile networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
- G01S5/22—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
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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
- G08G1/127—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 to a central station ; Indicators in a central station
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Multimedia (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention discloses a kind of, and the highway rear-end collision prevention based on wireless location velocity measuring technique guides system and method, belong to traffic safety management or guiding field, system includes position location satellite and the positioning-speed-measuring interactive terminal with position location satellite communication connection, further includes the Bluetooth base. station being arranged at intervals on highway track and the Core server with the communication connection of all Bluetooth base. stations；Positioning-speed-measuring interactive terminal is issued to the vehicle into highway in the form of hair fastener, and Bluetooth base. station sends out broadcast frame, the ID of itself is carried in broadcast frame in real time, and positioning-speed-measuring interactive terminal receives the location information and broadcast frame of position location satellite；Core server positions vehicle according to the location information and broadcast frame of position location satellite, simultaneously according to the speed of spacing and vehicle between the vehicle in the same track of location Calculation, judge whether in safety traffic range, and driver is reminded after transmitting a signal to positioning-speed-measuring interactive terminal.
Description
Technical field
The present invention relates to traffic safety management or guiding fields, specifically, being related to a kind of testing the speed skill based on wireless location
The highway rear-end collision prevention of art guides system and method.
Background technology
With the economic development and improvement of people's living standards, land communications development is getting faster, and vehicle population is more
It is expansion development, urban transportation and highway communication congestion phenomenon happen occasionally, and rear-end collision occurs continuous on highway.
Since the vehicle flowrate on highway is very big, it is easy to accident occur, major accident is to knock into the back.And cause the problem
The main reason for be front vehicle can not real-time perception front vehicles speed.Location and navigation technology makes rapid progress, based on GPS or
The satellite positioning precision of the technologies such as person's Big Dipper is higher and higher, be thus derived based on GPS or big-dipper satellite location technology
The applications such as test the speed and navigate also make rapid progress.But positioning accuracy can not be also accurate to decimeter grade by current location technology
Not.And existing location navigation application can only be handled the position and speed of equipment, not accomplish all vehicles
Situation Awareness.Part of the application software can collect navigation information and speed to remind driver's congestion in road state, but these are not
It is real-time.It is extremely difficult to remind in real time in the case of highway is this fast changing.
Chinese patent literature if publication No. is CN179733A discloses a kind of traffic dynamic and static management and function prison
Control warning command system, it is by vehicle detection attention device or vehicle detector, front controller or several controller/center calculations
Machine system and fieldbus transmission medium are constituted.It can be used as the anti-rear-end collision warning commander of mass rapid highway, railway monitoring
System, urban transportation intelligent monitoring Command Management System or parking lot monitoring guide management system etc., it is also possible to make large, medium and small rule
The red green wave band traffic guidance of mould, electronic police, gate inhibition, monitoring anti-theft, Bus- Speed Monitoring, vehicle Flow Detection and vehicle toll station system
System.
Another notification number is that the Chinese patent literature of CN102810257A discloses a kind of express highway intelligent monitoring system
It unites, includes mainly：Express highway intelligent password card, the driving situation and road conditions of complete monitoring vehicle on expressway；Without line number
According to transmission module, the communication connection between express highway intelligent communication card and remote management center is realized；Remote management center connects
The information for receiving road conditions and vehicle that intelligent password card obtains will be prompted to letter after the information of reception is recorded, analyzed and calculated
Breath passes to express highway intelligent password card by wireless data transfer module；Base of the patent in original highway passing card
Intelligent management system is increased on plinth, is suitable for this closed section of highway, without installing equipment on vehicle.
But two above system cannot achieve the state of perception surrounding vehicles, and reaches detection in real time and remind work(
Energy.
Invention content
The purpose of the present invention is to provide a kind of highway rear-end collision prevention guiding system based on wireless location velocity measuring technique, can
The vehicle for realizing more accurate positioning traveling, perceives the state of vehicle, and can with the transport condition of real-time perception surrounding vehicles,
Driver is set to avoid knock into the back Deng traffic accidents as far as possible.
Another object of the present invention is to provide a kind of highway rear-end collision prevention guiding side based on wireless location velocity measuring technique
Method, this method are based on above highway rear-end collision prevention guiding system and realize.
To achieve the goals above, the highway rear-end collision prevention guiding provided by the invention based on wireless location velocity measuring technique
System includes position location satellite and the positioning-speed-measuring interactive terminal with position location satellite communication connection, further includes being arranged at intervals on high speed public affairs
Bluetooth base. station on road car road and the Core server with the communication connection of all positioning-speed-measuring interactive terminals；Positioning-speed-measuring interacts
Terminal is issued to the vehicle into highway in the form of hair fastener, and Bluetooth base. station sends out the broadcast with self ID in real time
Frame, positioning-speed-measuring interactive terminal receive the location information and broadcast frame of position location satellite；Core server is determined according to position location satellite
The ID and signal strength of position information and broadcast frame position vehicle, while according to the vehicle in the same track of location Calculation
Between spacing and vehicle speed, judge whether in safety traffic range, and transmit a signal to positioning-speed-measuring interaction eventually
Driver is reminded behind end.
In above-mentioned technical proposal, by position location satellite to vehicle carry out coarse localization, and using Bluetooth base. station to vehicle into
Row is accurately positioned, and Bluetooth base. station uses low-power consumption bluetooth (BLE), and what positioning utilized is " announcement frame " entitled in BLE
(Advertising) broadcast frame reaches the power of the signal of received signal terminal to be positioned according to different base station.By
The low-power consumption bluetooth positioning network of low-power consumption bluetooth (BLE) equipment composition has many advantages, such as to stablize, and is affected by the external environment small.Base
In low-power consumption bluetooth (BLE) positioning real-time high-precision positioning-speed-measuring is realized as auxiliary positioning.The form that the program passes through hair fastener
Issue each driver into high speed.Positioning-speed-measuring interactive terminal provides interactive voice mode of operation, and it is aobvious to avoid driver's viewing
Display screen curtain, the risk for operation of bowing.Positioning-speed-measuring interactive terminal can receive the broadcast frame of Bluetooth base. station transmission, pass through wireless network
The coarse localization information that the ID of broadcast frame and signal strength and position location satellite carry out is sent to Core server by network.Core takes
Business accurately positions positioning-speed-measuring interactive terminal according to information above.
Core server is the core of the system.Core server receives the number that positioning-speed-measuring interactive terminal is sent
According to, positioning-speed-measuring interactive terminal is accurately positioned, calculate the positioning-speed-measuring interactive terminal interacted with other positioning-speed-measurings eventually
The distance at end, the information such as speed send prompting message to positioning-speed-measuring interactive terminal.If positioning-speed-measuring interactive terminal and other
When hypotelorism, that is, spacing of positioning-speed-measuring interactive terminal unit is excessively close, Core server will be sent out to positioning-speed-measuring interactive terminal
Send prompting message.Meanwhile the vehicle hypervelocity where positioning-speed-measuring interactive terminal, positioning-speed-measuring interactive terminal also receives prompting message.
When the traveling behavior of vehicle violation, Core server can remind driver in time, and the unlawful practice is sent to neighbouring vehicle, allow attached
Close vehicle evades the vehicle of traveling in violation of rules and regulations as possible.If the vehicle has illegal running behavior, Core server can also be by illegal running row
For data be sent to relevant departments.
Specific scheme is to be equipped in positioning-speed-measuring interactive terminal：
Satellite positioning module carries out the coarse localization information that communication obtains vehicle with position location satellite；
Bluetooth receiving module, the broadcast frame for receiving Bluetooth base. station transmission；
The ID and signal strength of the coarse localization information and broadcast frame are sent to kernel service by wireless communication module
Device, and receive the information that Core server is fed back；
Voice module sends out phonetic warning according to the information that Core server is fed back to driver；
Kernel control module, the above each module of control complete specific function；
Power module, output successively with satellite positioning module, bluetooth receiving module, wireless communication module, voice module
And kernel control module connection.
More specific scheme is that bluetooth receiving module and kernel control module are integrated in same low-power consumption bluetooth intelligence SoC cores
On the EFR32BG12P332F1024GM48-B main control chips of piece EFR32BG12 series；Satellite positioning module and wireless telecommunications mould
Block is integrated on same U8300W-V2R LTE-TDD/LTE-FDD wireless communication modules；Voice module uses Si3000-C-GS
Speech chip coordinates the microphone and loudspeaker composition of periphery；Si3000-C-GS speech chips by SPI communication modes with
EFR32BG12P332F1024GM48-B main control chips communicate, and the transmitting voice signal of acquisition is arrived
In the DSP core of EFR32BG12P332F1024GM48-B main control chips, voice signal is identified by kernel control module,
It is converted into text information；EFR32BG12P332F1024GM48-B main control chips pass through UART communication interfaces and U8300W-V2R
LTE-T DD/LTE-FDD wireless communication modules connect.
EFR32BG12P332F1024GM48-B main control chips are integrated with high-performance 32-bit 40MHz ARM
Kernel, with DSP instructions and floating point calculating unit, it can be achieved that efficient signal processing.It supports simultaneouslyLow energy consumption
(Bluetooth5) communication protocol, it is only necessary to which Bluetooth broadcast frame reception purpose can be reached by drawing onboard Bluetooth antenna both.
U8300W-V2R LTE-TDD/LTE-FDD wireless communication modules can be operated in LTE-TDD/LTE-FDD/TD-SCDMA/
Under the multiple types such as UMTS/EDGE/GPRS/GSM/GPS, may be used also in addition to satellite positioning effect and high-speed data access function
The functions such as short message, multimedia message, telephone directory, voice communication are provided.
Another specific scheme is that Bluetooth base. station is the disc-shaped with thickness, a diameter of 30~60mm, and with embedding
The mode of conjunction is arranged on carriageway surfacing.Conveniently and traffic will not be impacted.It is preferred that a diameter of 50mm of Bluetooth base. station.
Another specific scheme be Bluetooth base. station be arranged on the center line in track, and between adjacent two Bluetooth base. station away from
From for 2.5~3.5m.Convenient preferably fixation and recognition.
Another specific scheme is that Bluetooth base. station includes that power supply and the bluetooth being connected with power output end send part, blue
Tooth sends part for being sent out the broadcast frame with self ID.
More specific scheme is that bluetooth sends part using low-power consumption bluetooth intelligence SoC chip EFR32BG12 series
EFR32BG12P332F1024GM48-B main control chips.
In order to realize above-mentioned another object, the highway rear-end collision prevention provided by the invention based on wireless location velocity measuring technique
Bootstrap technique based on above-mentioned highway knock into the back guiding system complete comprising following steps：
1) the interval setting Bluetooth base. station on each track of highway, stores the wide of each Bluetooth base. station in Core server
Frame ID is broadcast, and establishes the relational model of distance and broadcast frame signal strength；
2) it is separated by scheduled time interval to be once pre-positioned the vehicle in traveling using position location satellite, obtains vehicle
Position Approximate；
3) positioning-speed-measuring interactive terminal in vehicle receives the broadcast frame of Bluetooth base. station, by broadcast frame ID and signal strength with
And the predetermined bit information of satellite positioning is sent to Core server, Core server is according to broadcast frame ID and distance and broadcast frame
The relational model of signal strength is accurately positioned vehicle, and identifies the vehicle in same track；
4) according to the adjacent speed being accurately positioned twice with scheduled time interval calculating vehicle of vehicle, while according to same
The spacing of each vehicle being accurately positioned between two vehicles of calculating in track, and judge that the spacing of adjacent two vehicle is with spacing according to speed
It is no to be less than safety traffic distance；
If 5) judge, the spacing of adjacent two vehicle is less than safety traffic distance, and driver is reminded by way of voice reminder
Member.
Specifically scheme includes for the relational model for establishing distance and broadcast frame signal strength in step 1)：Broadcast frame is believed
Number intensity is divided into three grades, and the corresponding distance of level-one, two level and three-level, wherein level-one is 0~0.1m, the corresponding distance of two level
For 0.1~1m, the corresponding distance of three-level is more than 1m.
Another specific scheme is in step 3) according to broadcast frame ID and the relationship of distance and broadcast frame signal strength
It is triangulation location calculating method that model carries out pinpoint method to vehicle.
Compared with prior art, beneficial effects of the present invention are：
The present invention is based on the highway rear-end collision prevention of wireless location velocity measuring technique guiding system and methods can be more accurate
Be located in the vehicle of running on expressway, perceive the state of vehicle, and can allow vehicle perception surrounding vehicles traveling shape
State makes driver avoid knock into the back Deng traffic accidents as far as possible.Meanwhile positioning-speed-measuring interactive terminal is also used as high speed and receives
Take the function of card and navigator.
Description of the drawings
Fig. 1 is that the highway rear-end collision prevention of the embodiment of the present invention guides the overall schematic of system；
Fig. 2 is composition schematic diagram inside the positioning-speed-measuring interactive terminal of the embodiment of the present invention；
Fig. 3 is each module connection diagram inside the positioning-speed-measuring interactive terminal of the embodiment of the present invention；
Fig. 4 is the arrangement schematic diagram of the Bluetooth base. station of the embodiment of the present invention on a highway；
Fig. 5 is the internal circuit diagram of the positioning-speed-measuring interactive terminal of the embodiment of the present invention；
Fig. 6 is the internal circuit diagram of the Bluetooth base. station of the embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, with reference to embodiments and its attached drawing is to this hair
It is bright to be described further.
Embodiment 1
Referring to Fig. 1 to Fig. 6, the highway rear-end collision prevention guiding system provided in this embodiment based on wireless location velocity measuring technique
System includes Core server 100, Bluetooth base. station 200, position location satellite 300 and positioning-speed-measuring interactive terminal 400.Bluetooth base. station 200
It is arranged at intervals on highway track, positioning-speed-measuring interactive terminal 400 is issued in the form of hair fastener into highway
Vehicle is communicated with position location satellite 300 and is connected.Bluetooth base. station 200 sends out broadcast frame, positioning-speed-measuring interactive terminal in real time
The broadcast frame that the location information and Bluetooth base. station 200 of 400 reception position location satellites are sent out.Core server 100 is according to positioning-speed-measuring
The location information and broadcast frame ID and broadcast frame signal strength for the position location satellite that 400 communication transfer of interactive terminal comes to vehicle into
Row positioning, while according to the speed of spacing and vehicle between the vehicle in the same track of location Calculation, judging whether in peace
Full driving range, and remind driver after transmitting a signal to positioning-speed-measuring interactive terminal 400.
Satellite positioning module 002, bluetooth receiving module 005, wireless is equipped in the positioning-speed-measuring interactive terminal of the present embodiment
Communication module 004, voice module 003, kernel control module 001 and power module 006.
Bluetooth receiving module 005 is used to receive the broadcast frame of the transmission of Bluetooth base. station 200, bluetooth receiving module 005 and core
Control module 001 is integrated in same low-power consumption bluetooth intelligence SoC chip EFR32BG12 series
On EFR32BG12P332F1024GM48-B main control chips, integrated chip high-performance 32-bit 40MHz ARMKernel, with DSP instructions and floating point calculating unit, it can be achieved that efficient signal processing.It supports simultaneouslyLow energy consumption (Bluetooth5) communication protocol, it is only necessary to which drawing onboard Bluetooth antenna, can both to have reached bluetooth wide
It broadcasts frame and receives purpose.
Satellite positioning module 002 carries out the coarse localization information that communication obtains vehicle, wireless telecommunications mould with position location satellite 300
The broadcast frame that coarse localization information and Bluetooth base. station 200 are sent out is sent to Core server 100 by block 004, and receives core clothes
The information that business device 100 is fed back.Satellite positioning module 002 and wireless communication module 004 are integrated in same U8300W-V2R
On LTE-TDD/LTE-FDD wireless communication modules, which can be operated in LTE-TDD/LTE-FDD/TD-SCDMA/
Under the multiple types such as UMTS/EDGE/GPRS/GSM/GPS.It is also carried in addition to satellite positioning effect and high-speed data access function
For functions such as short message, multimedia message, telephone directory, voice communications.
Voice module 003 sends out phonetic warning according to the information that Core server is fed back to driver, uses
Si3000-C-GS speech chips coordinate the microphone and loudspeaker composition of periphery.Si3000-C-GS speech chips are logical by SPI
News pattern is communicated with EFR32BG12P332F1024GM48-B main control chips, and the transmitting voice signal of acquisition is arrived
In the DSP core of EFR32BG12P332F1024GM48-B main control chips, voice signal is identified by kernel control module,
It is converted into text information；
EFR32BG12P332F1024GM48-B main control chips pass through UART communication interfaces and U8300W-V2R LTE-TDD/
LTE-FDD wireless communication modules connect.
The Bluetooth base. station 200 of the present embodiment is the disc-shaped with thickness, and a diameter of 50mm is arranged in a manner of chimeric
On carriageway surfacing, and on the center line of track, the distance between adjacent two Bluetooth base. station 200 is 3m.
Part is sent equipped with power supply and the bluetooth being connected with power output end in Bluetooth base. station 200, bluetooth sends part and is used for
It is sent out broadcast frame.It is blue using low-power consumption identical with bluetooth receiving module 005 and kernel control module 001 that bluetooth sends part
Tooth intelligence SoC chip EFR32BG12 series
EFR32BG12P332F1024GM48-B main control chips.The module completes the control task that broadcast frame is sent.
The course of work of the above-mentioned highway rear-end collision prevention guiding system based on wireless location velocity measuring technique is as follows：
Positioning-speed-measuring interactive terminal 400 is issued to the vehicle into highway by highway personnel in the form of hair fastener
?.
Positioning-speed-measuring interactive terminal 400 obtains the coarse localization of vehicle by satellite positioning module 002 and position location satellite 200
Information.Positioning-speed-measuring interactive terminal 400 carries oneself ID's by what the reception Bluetooth base. station 200 of bluetooth receiving module 005 was broadcasted
Bluetooth broadcast frame, while also obtaining when collecting Bluetooth broadcast frame the signal strength of broadcast frame.According to the signal of Bluetooth broadcast frame
Intensity is divided into three ranks, very closely, closely, far." very close " corresponding distance is within 10 centimetres of distance；" close " it is corresponding away from
Within for a distance from 1 meter；" remote " corresponding distance is other than 1 meter of distance.
In synchronization, positioning-speed-measuring interactive terminal 400 can receive the broadcast frame of the transmission of multiple Bluetooth base. stations 200.It is fixed
Interactive terminal 400 test the speed by the signal of coarse localization information and the Bluetooth broadcast frame ID and broadcast frame that receive in synchronization in position
Intensity is sent to Core server 100 by wireless communication module 004.
Core server 100 according to receiving the rough and careless location information of satellite that positioning-speed-measuring interactive terminal 400 sends over, with
And the ID of Bluetooth broadcast frame and the signal strength of broadcast frame carry out high-precision positioning.Core server 100 is according to broadcast frame
ID and signal strength compare ID and the position of the Bluetooth base. station stored in Core server, by triangle polyester fibre algorithm to positioning
Interactive terminal 400 of testing the speed carries out high-precision positioning.Such as：The intensity for receiving the Bluetooth broadcast frame of Bluetooth base. station A is " close ", is received
Intensity to the Bluetooth broadcast frame of Bluetooth base. station B is " close ", and the intensity for receiving Bluetooth base. station C is " close ", receives Bluetooth base. station D's
Signal is " remote ", then can be concluded that positioning-speed-measuring interactive terminal 400 in the overlay region in Bluetooth base. station A, B, C, 1 meter of distance
In domain.Or it is " very close " to receive the intensity of the Bluetooth broadcast frame of Bluetooth base. station E, then can be concluded that positioning-speed-measuring interactive terminal
400 apart from Bluetooth base. station E less than 10 centimetres in the range of.Under the precision, the parallel vehicles on different tracks can be positioned.
Core server 100 can be high-precision according to the variation of the location information of positioning-speed-measuring interactive terminal 400 and time difference
The speed for calculating 400 place vehicle of positioning-speed-measuring interactive terminal of degree.
Core server 100 is collected simultaneously the location information and speed of multiple positioning-speed-measuring interactive terminals 400, and traveling
Direction.
If the spacing between two positioning-speed-measuring interactive terminals 400 is less than safe space between motorcars, kernel service 100 can lead to
It crosses wireless network and sends prompting message to positioning-speed-measuring interactive terminal 400.Positioning-speed-measuring interactive terminal 400 passes through voice module
003 prompting driver maintains safe distance.
Core server 100 is before the 400 positive fast approaching of place vehicle of positioning-speed-measuring interactive terminal for finding same track
400 place vehicle of square positioning-speed-measuring interactive terminal, and the distance between 400 place vehicle of positioning-speed-measuring interactive terminal is less than safety
Running distance.Core server 100 can remind the driver positioned at front to pay attention to accelerating by positioning-speed-measuring interactive terminal 400,
It can will be sent to simultaneously positioned at the speed of the 400 place vehicle of positioning-speed-measuring interactive terminal in front and be located behind positioning-speed-measuring interaction eventually
The driver of 400 place vehicles is held, rear driver is reminded to pay attention to Reduced Speed Now.
The speed that Core server 100 is calculated according to the variation and interval time of positioning finds positioning-speed-measuring interaction
400 place vehicle of terminal has reversing, hypervelocity, and when the illegal activities such as illegal parking, Core server 100 can hand over the positioning-speed-measuring
The information of mutual terminal 400 is sent to relevant departments' processing.Meanwhile it can also remind the positioning-speed-measuring interactive terminal 400 vehicle nearby
Driver, remind driver make reply in advance, avoid the traffic accident occurred because of not discovering.
Since positioning-speed-measuring interactive terminal 400 need not carry out communication interaction with Bluetooth base. station, it is only necessary to receive bluetooth base
Stand send information, so positioning-speed-measuring interactive terminal 400 can quickly parse the ID and signal strength of Bluetooth base. station.It can
With by the high-precision position for orienting positioning-speed-measuring interactive terminal of Core server, speed higher than traditional satellite positioning
It is fast.When vehicle travels on a highway, driver can be by way of voice on positioning-speed-measuring interactive terminal 400
Setting traveling destination, is navigated by positioning-speed-measuring interactive terminal 400, the high accuracy positioning of positioning-speed-measuring interactive terminal 400
The lag that navigation information pushes can be effectively avoided with quick positioning, while can also be according to the speed of place vehicle-surroundings vehicle
Degree and density, the accurate opportunity for reminding driver to be driven out to highway.Such as：If 400 periphery of positioning-speed-measuring interactive terminal has greatly
The positioning-speed-measuring interactive terminal 400 of amount is being run at high speed, and positioning-speed-measuring interactive terminal 400 can remind driver to shift to an earlier date lane change, carry
Preceding preparation travels out highway.If there is the positioning-speed-measuring interactive terminal 400 of continuous high speed travels beside it, then suggest driving
The person of sailing reduces speed, waits for suitable opportunity lane change, avoids missing outlet.
Embodiment 2
Highway rear-end collision prevention provided in this embodiment based on wireless location velocity measuring technique is guided based in embodiment 1
Highway rear-end collision prevention guides system to realize comprising following steps：
S1 is spaced setting Bluetooth base. station on each track of highway, and the wide of each Bluetooth base. station is stored in Core server
Frame ID is broadcast, and establishes the relational model of distance and broadcast frame signal strength；
The relational model for establishing distance and broadcast frame signal strength includes：
Broadcast frame signal strength is divided into three grades, the corresponding distance of level-one, two level and three-level, wherein level-one is 0~
0.1m, the corresponding distance of two level are 0.1~1m, and the corresponding distance of three-level is more than 1m.
S2 is separated by scheduled time interval and is once pre-positioned to the vehicle in traveling using position location satellite, and vehicle is obtained
Position Approximate.
Positioning-speed-measuring interactive terminal in S3 vehicles receives the broadcast frame of Bluetooth base. station, and according to broadcast frame ID and distance
Vehicle is accurately positioned with the relational model of broadcast frame signal strength, pinpoint method is triangulation location calculating method,
And identify the vehicle in same track.
S4 calculates the speed of vehicle with scheduled time interval according to adjacent be accurately positioned twice of vehicle, while according to same
The spacing of each vehicle being accurately positioned between two vehicles of calculating in track, and judge that the spacing of adjacent two vehicle is with spacing according to speed
It is no to be less than safety traffic distance.
If S5 judges that the spacing of adjacent two vehicle is less than safety traffic distance, driver is reminded by way of voice reminder
Member.
Claims (10)
1. a kind of highway rear-end collision prevention based on wireless location velocity measuring technique guides system, including position location satellite and with it is described fixed
The positioning-speed-measuring interactive terminal of position satellite communication connection, it is characterised in that：
Further include the Bluetooth base. station being arranged at intervals on highway track and communicates company with the positioning-speed-measuring interactive terminal
The Core server connect；
The positioning-speed-measuring interactive terminal is issued to the vehicle into highway in the form of hair fastener, and the Bluetooth base. station is real-time
Broadcast frame is sent out, carries the ID of itself in broadcast frame, the positioning-speed-measuring interactive terminal receives determining for the position location satellite
Position information and the broadcast frame；
The Core server according to positioning-speed-measuring interactive terminal communication transfer come position location satellite location information and
The ID and signal strength of the broadcast frame position vehicle, while according between the vehicle in the same track of location Calculation
The speed of spacing and vehicle judges whether in safety traffic range, and transmits a signal to the positioning-speed-measuring interactive terminal
After remind driver.
2. highway rear-end collision prevention according to claim 1 guides system, which is characterized in that the positioning-speed-measuring interaction
It is equipped in terminal：
Satellite positioning module carries out the coarse localization information that communication obtains vehicle with the position location satellite；
Bluetooth receiving module, the broadcast frame sent for receiving the Bluetooth base. station；
The ID and signal strength of the coarse localization information and broadcast frame are sent to the kernel service by wireless communication module
Device, and receive the information that the Core server is fed back；
Voice module sends out phonetic warning according to the information that Core server is fed back to driver；
Kernel control module, the above each module of control complete specific function；
Power module, output successively with the satellite positioning module, bluetooth receiving module, wireless communication module, voice module
And kernel control module connection.
3. highway rear-end collision prevention according to claim 2 guides system, it is characterised in that：
The bluetooth receiving module and the kernel control module are integrated in same low-power consumption bluetooth intelligence SoC chip
On the EFR32BG12P332F1024GM48-B main control chips of EFR32BG12 series；
The satellite positioning module and the wireless communication module are integrated in same U8300W-V2RLTE-TDD/LTE-FDD
On wireless communication module；
The voice module uses Si3000-C-GS speech chips, coordinates the microphone and loudspeaker composition of periphery；
Si3000-C-GS speech chips are communicated by SPI communication modes and EFR32BG12P332F1024GM48-B main control chips, will be adopted
In the transmitting voice signal of collection to the DSP core of EFR32BG12P332F1024GM48-B main control chips, by kernel control module
Voice signal is identified, text information is converted into；
EFR32BG12P332F1024GM48-B main control chips pass through UART communication interfaces and U8300W-V2R LTE-TDD/LTE-
FDD wireless communication modules connect.
4. highway rear-end collision prevention according to claim 1 guides system, it is characterised in that：
The Bluetooth base. station is the disc-shaped with thickness, a diameter of 30~60mm, and is arranged in vehicle in a manner of chimeric
In road surface.
5. highway rear-end collision prevention according to claim 1 guides system, it is characterised in that：
The Bluetooth base. station is arranged on the center line in track, and the distance between adjacent two Bluetooth base. station is 2.5~3.5m.
6. highway rear-end collision prevention according to claim 1 guides system, it is characterised in that：
The Bluetooth base. station includes power supply and the bluetooth being connected with power output end sends part, and the bluetooth sends part and is used for
It is sent out the broadcast frame.
7. highway rear-end collision prevention according to claim 6 guides system, it is characterised in that：
The bluetooth sends part using low-power consumption bluetooth intelligence SoC chip EFR32BG12 series
EFR32BG12P332F1024GM48-B main control chips.
8. a kind of highway rear-end collision prevention bootstrap technique based on wireless location velocity measuring technique, which is characterized in that including following step
Suddenly：
1) the interval setting Bluetooth base. station on each track of highway, stores the broadcast frame of each Bluetooth base. station in Core server
ID, and establish the relational model of distance and broadcast frame signal strength；
2) it is separated by scheduled time interval to be once pre-positioned the vehicle in traveling using position location satellite, obtains the big of vehicle
Position approximate is set；
3) positioning-speed-measuring interactive terminal in vehicle receives the broadcast frame of Bluetooth base. station, and according to broadcast frame ID and distance with it is wide
The relational model for broadcasting frame signal intensity is accurately positioned vehicle, and identifies the vehicle in same track；
4) according to the adjacent speed being accurately positioned twice with scheduled time interval calculating vehicle of vehicle, while according to same track
Interior each vehicle is accurately positioned the spacing calculated between two vehicles, and judges whether the spacing of adjacent two vehicle is small with spacing according to speed
In safety traffic distance；
If 5) judge, the spacing of adjacent two vehicle is less than safety traffic distance, and driver is reminded by way of voice reminder.
9. highway rear-end collision prevention according to claim 8 guides system, which is characterized in that established in step 1) distance with
The relational model of broadcast frame signal strength includes：
Broadcast frame signal strength is divided into three grades, the corresponding distance of level-one, two level and three-level, wherein level-one is 0~0.1m,
The corresponding distance of two level is 0.1~1m, and the corresponding distance of three-level is more than 1m.
10. according to claim 8 tell highway the anti-guiding system that knocks into the back, it is characterised in that：
Vehicle is accurately positioned according to the relational model of broadcast frame ID and distance and broadcast frame signal strength in step 3)
Method be triangulation location calculating method.
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