CN103824457A - Inquiry system and inquiry method for highway driving safety information based on VANET (Vehicular Ad-hoc Network) - Google Patents
Inquiry system and inquiry method for highway driving safety information based on VANET (Vehicular Ad-hoc Network) Download PDFInfo
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Abstract
The invention provides an inquiry system and an inquiry method for highway driving safety information based on a VANET (Vehicular Ad-hoc Network) and relates to the inquiry system and the inquiry method for the highway driving safety information, aiming to effectively obtain information of driving vehicles on a highway in real time. The invention provides an auxiliary driving system which is used for obtaining vehicle information in a certain range based on a vehicular ad-hoc network and providing a direct promotion to a driver through a display screen. The system comprises an information acquisition subsystem, a vehicular ad-hoc network module and a display module. The information acquisition subsystem has the main function of acquiring data related to a current operation state of the vehicle; the vehicular ad-hoc network module is used for establishing a movable ad-hoc network with the vehicles in a certain range, and obtaining the information of the periphery vehicles by carrying out a query. The display module is used for matching the acquired related information of the vehicle and the information of the periphery vehicles obtained by the VANET through an electronic map and directly displaying to the driver. The inquiry system and the inquiry method for the highway driving safety information based on the VANET are applicable to a highway driving process.
Description
Technical field
The present invention relates to a kind of express way driving safety information query system and querying method.
Background technology
China is in expressway construction fast development period, and the volume of traffic is large, road speed height is the distinguishing feature of highway, once therefore there are major traffic accidents, will bring huge loss to people's lives and properties.Grasp in time traffic and road environment, be conducive to driver and adjust at any time driving condition, take the corresponding strategy of driving, improve traffic safety.The research of present stage is started with from the relation of car and people, car and road environment often, inquires about corresponding information.As: the typing by driver information obtains driver's relevant information, obtains the position at vehicle place by GPS, according to the road conditions and the weather condition etc. that obtain current location of being connected of INTERNET.But in the system of people-Che-Lu, the relation between car and car is same very important, and also relatively less for the system of this respect exploitation.
Car self-organization network (VANET) is a kind of movable self-organization network technology being applied between vehicle, and this technology can effectively address the above problem.It is by set up Ad Hoc network between the vehicle travelling, and in conjunction with GPS, electronic chart and the technology such as INTERNET communicates by letter, can efficiently inquire accurately abundant external information.Thereby the turnpike driving inquiry system of exploitation based on VANET, contributes to obtain timely and effectively the information on highway, thereby improve security and the smoothness of freeway traffic operation.
Summary of the invention
The present invention obtains the information on highway in real time effectively in order to realize operating vehicle, thereby a kind of express way driving safety information query system and querying method based on VANET is provided.
Express way driving safety information query system based on VANET, it comprises M vehicle-carrying communication unit and remote information searching platform, M is greater than 1 integer;
Between M vehicle-carrying communication unit, can carry out radio communication;
Each vehicle-carrying communication unit includes control module 1, inter-vehicle communication module 2, GPS locating module 3, Internet communication module 4, supply module 5 and display screen 6;
The workshop signal of described inter-vehicle communication module 2 inputs or outputs end and is connected with workshop signal output or the input end of control module 1; The gps signal output terminal of described GPS locating module 3 is connected with the gps signal input end of control module 1; Control module 1 accesses remote information searching platform by Internet communication module 4; Supply module 5 is for providing working power to control module 1, inter-vehicle communication module 2, GPS locating module 3, Internet communication module 4 and display screen 6; The display input end of display screen 6 is connected with the display output terminal of control module 1;
Remote information searching platform comprises data storage server 21, database module 22, data processing module 23 and electronic map data module 24 and display module 25;
Electronic map data module 24 is for providing electronic map data to data processing module 23;
It also comprises vehicle-mounted data source 7, and the vehicle-mounted data signal output part in described vehicle-mounted data source 7 is connected with the vehicle-mounted data signal input part of control module 1.
Control module 1 is embedded microprocessor.
Based on the express way driving safety information query method based on VANET of said system, it is realized by following steps: within a time cycle,
Step 1, requesting query vehicle are broadcasted a requesting query packet by the inter-vehicle communication module 2 of self in presetting range, and this packet comprises ID, request time, the requesting query vehicle position information of inquiry mark, requesting query vehicle, speed and the requesting query vehicle heading of requesting query vehicle;
Complete after this time cycle,
Same vehicle is only processed once the id information of same vehicle within a time cycle.
When each vehicle carries out data broadcast or data retransmission, request data package or response data packet are forwarded in the data storage service module of remote information searching platform simultaneously.
The information of vehicles of the vehicle in response data packet comprises natural information, the speed of a motor vehicle and the relative position of vehicle; Wherein, the natural information of vehicle comprises: vehicle, the total milimeter number of Vehicle Driving Cycle and vehicle working condition; The speed of a motor vehicle comprises the actual vehicle speed of surrounding vehicles, and the relative speed of a motor vehicle of center car and surrounding vehicles; Relative position is the relative position of central vehicle and surrounding vehicles.
The driver information of the vehicle in response data packet comprises driver's age, sex and the driving age.
Driver information in response data packet obtains by vehicle-mounted bar code scanning device scan driver's driver's license; The driving duration of vehicle obtains by vehicle-mounted counter.
The fatigue strength data that also comprise driver in response data packet, the preparation method of described fatigue strength data is:
Adopt camera collection eye image, then according to image recognition technology, obtain eyes closed degree, time and frequency, as fatigue strength data.
The present invention is based on car self-organization network (VANET) technology, effectively obtain the information on highway in real time.Improve security and the smoothness of freeway traffic operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of vehicle-carrying communication of the present invention unit;
Fig. 2 is the Principle of Communication schematic diagram of the express way driving safety information query system based on VANET of the present invention;
Fig. 3 is the demonstration schematic diagram of middle Query Result of the present invention;
Embodiment
Embodiment one, in conjunction with Fig. 1 and Fig. 2, this embodiment is described, the express way driving safety information query system based on VANET, it comprises M vehicle-carrying communication unit and remote information searching platform, M is greater than 1 integer;
Between M vehicle-carrying communication unit, can carry out radio communication;
Each vehicle-carrying communication unit includes control module 1, inter-vehicle communication module 2, GPS locating module 3, Internet communication module 4, supply module 5 and display screen 6;
The workshop signal of described inter-vehicle communication module 2 inputs or outputs end and is connected with workshop signal output or the input end of control module 1; The gps signal output terminal of described GPS locating module 3 is connected with the gps signal input end of control module 1; Control module 1 accesses remote information searching platform by Internet communication module 4; Supply module 5 is for providing working power to control module 1, inter-vehicle communication module 2, GPS locating module 3, Internet communication module 4 and display screen 6; The display input end of display screen 6 is connected with the display output terminal of control module 1;
Remote information searching platform comprises data storage server 21, database module 22, data processing module 23 and electronic map data module 24 and display module 25;
Electronic map data module 24 is for providing electronic map data to data processing module 23;
The difference of the express way driving safety information query system based on VANET described in embodiment two, this embodiment and embodiment one is, it also comprises vehicle-mounted data source, and the vehicle-mounted data signal output part in described vehicle-mounted data source is connected with the vehicle-mounted data signal input part of control module 1.
The difference of the express way driving safety information query system based on VANET described in embodiment three, this embodiment and embodiment one is, control module 1 is embedded microprocessor.
The difference of the express way driving safety information query system based on VANET described in embodiment four, this embodiment and embodiment one is, data storage server 21 receives road conditions and the weather data that the real time traffic data sending from each vehicle-carrying communication comprises coordinate in electronic chart of driver information, vehicle condition, vehicle, the speed of a motor vehicle, vehicle headway, this car region.
Principle of work: (1) general frame
This system is to obtain the information of vehicles in certain limit based on car self-organization network, and provides the DAS (Driver Assistant System) of prompting directly perceived by display screen for driver.System composition comprises: information acquisition subsystem, car self-organization network (VANET) module and display module.The function of information acquisition module is mainly to gather and the relevant data of the current running status of vehicle, comprises positional information, velocity information etc., also comprises weather and road information; Also gather the relevant driver's of same driving behavior relevant information, as age, sex, driving age, driving duration etc. simultaneously.Car self-organization network module be with certain limit in vehicle set up mobile ad hoc network, inquire about the information of Real-time Obtaining nearby vehicle by initiation.Display module is that this car relevant information collecting and the information exchange of the nearby vehicle obtaining by VANET are crossed to electronic map match, after suitable processing, is shown to intuitively driver.
At hardware aspect, as shown in Figure 1, information acquisition subsystem comprises GPS locating module, Internet communication module, vehicle-mounted data source etc., car self-organization network is realized by wireless communication module, display device mainly comprises the liquid crystal display of the input media of having arranged in pairs or groups, and above various devices are connected to an embedded microprocessor and form the Expressway Information inquiry system based on car self-organization network.
(2) workflow of system
The workflow of this system as shown in Figure 2.Wherein mark V is car-mounted device; First system gathers driver's data by information acquisition subsystem, driving vehicle data (comprise travel speed, relative position, the information such as real time position), make Frame via microprocessor, receiving after the inquiry request that surrounding vehicles sends, give request vehicle by car networking share, simultaneously also send inquiry request to every other vehicle in net, and by the data that receive with its data combination, coupling electronic chart, finally by display device by the information display after integrating to driver.Driver can understand vehicle distribution situation and travel situations around intuitively by the image of display screen, and these information can help driver ready in advance to all kinds of emergency case effectively.Especially not good in weather conditions, in the situation of poor visibility, the function that this system provides can be assisted driving, greatly reduces the generation of burst accident and secondary accident.
Below the function of system each several part is described respectively.
(3) data acquisition
For the information inquiry of highway, can collect active data be vital.Freeway facility is a closed system being made up of people, Che He road, if thereby the information of information spinner driver, vehicle and the road environment that need to gather.
1., driver's information.Driver's information comprises driver's personal information and driving condition.Wherein, in driver's personal information, contain: age of driver, sex, driving age etc.; In driving condition, comprise: drive the duration, whether tired etc.
Driver carries out authentication by the bar code on scanning driver's license after getting on the bus, and system is obtained the information such as driver's age, sex and driving age from corresponding database by 3G Mobile Communication Service.In the time of running car, the counter that system carries starts counting, obtains corresponding driving the duration.When exercising after certain hour, according to image recognition technology, utilize camera collection eye image, judge whether fatigue by analyzing eyes closed degree, time and frequency.
2., the information of vehicle.The information of vehicle comprises the natural information of vehicle, the speed of a motor vehicle and relative position.Wherein, the natural information of vehicle comprises vehicle, the total milimeter number of Vehicle Driving Cycle and vehicle working condition etc.; The speed of a motor vehicle comprises the actual vehicle speed of surrounding vehicles, and the relative speed of a motor vehicle of center car and surrounding vehicles; Relative position is the relative position of central vehicle and surrounding vehicles.
Before vehicle uses first, need to be by the Data Enter such as vehicle, performance condition in database, after each annual test or when vehicle maintenance, synchronously upgrade the information such as the total milimeter number of Vehicle Driving Cycle, vehicle working condition.System, by 3G Mobile Service interchange data storehouse, therefrom obtains the natural information of required vehicle.
In the driving process of vehicle, system can be extracted relevant date, time according to the NEMA0183 standard in GPS module, longitude and latitude, speed, the information such as travel direction, thereby the actual vehicle speed that obtains vehicle, by by overlapping to gps signal and electronic chart, can obtain the position of vehicle intuitively.Recycling VANET technology realizes the information sharing between vehicle, thereby draws relative velocity and the relative position of central vehicle and surrounding vehicles.
3., pavement behavior and weather condition.The location information that system is extracted according to gps data, utilizes 3G mobile communication, by the application programming interfaces of corresponding road conditions and weather website, captures in real time the information of site pavement behavior and weather condition.
Embodiment five, the express way driving safety information query method based on VANET based on embodiment one, it is realized by following steps: within a time cycle,
Step 1, requesting query vehicle are broadcasted a requesting query packet by the inter-vehicle communication module 2 of self in presetting range, and this packet comprises ID, request time, the requesting query vehicle position information of inquiry mark, requesting query vehicle, speed and the requesting query vehicle heading of requesting query vehicle;
Complete after this time cycle,
Same vehicle is only processed once the id information of same vehicle within a time cycle.
When each car two carries out data broadcast or data retransmission, request data package or response data packet are forwarded in the data storage service module of remote information searching platform simultaneously.
The information of vehicles of the vehicle in response data packet comprises natural information, the speed of a motor vehicle and the relative position of vehicle; Wherein, the natural information of vehicle comprises: vehicle, the total milimeter number of Vehicle Driving Cycle and vehicle working condition; The speed of a motor vehicle comprises the actual vehicle speed of surrounding vehicles, and the relative speed of a motor vehicle of center car and surrounding vehicles; Relative position is the relative position of central vehicle and surrounding vehicles.
The driver information of the vehicle in response data packet comprises driver's age, sex and the driving age.
Driver information in response data packet obtains by vehicle-mounted bar code scanning device scan driver's driver's license; The driving duration of vehicle obtains by vehicle-mounted counter.
The fatigue strength data that also comprise driver in response data packet, the preparation method of described fatigue strength data is:
Adopt camera collection eye image, then according to image recognition technology, obtain eyes closed degree, time and frequency, as fatigue strength data.
The information that system obtains is presented on display screen after treatment, and display screen requires under the control of microprocessor, effectively to suppress flating, realizes stable output, meets the demonstration requirement of system.
As shown in Figure 3, the Query Information schematic diagram for showing in system display.The relative position of each vehicle within the scope of car self-organization network is illustrated in to the centre of display screen, circle represents the automobile in MANET, black circle represents central vehicle, give car number around (as shown in FIG. 1 by order from top to bottom, 2,3,4,), what the rightmost of display screen showed is the relevant information of central vehicle.In the time that click is numbered the vehicle of N, can be in the perimeter query of road to the relevant information of this car, and and then judge corresponding traffic safety grade.
Claims (10)
1. the express way driving safety information query system based on VANET, is characterized in that: it comprises M vehicle-carrying communication unit and remote information searching platform, and M is greater than 1 integer;
Between M vehicle-carrying communication unit, can carry out radio communication;
Each vehicle-carrying communication unit includes control module (1), inter-vehicle communication module (2), GPS locating module (3), Internet communication module (4), supply module (5) and display screen (6);
The workshop signal of described inter-vehicle communication module (2) inputs or outputs end and is connected with workshop signal output or the input end of control module (1); The gps signal output terminal of described GPS locating module (3) is connected with the gps signal input end of control module (1); Control module (1) is by Internet communication module (4) access remote information searching platform; Supply module (5) is for providing working power to control module (1), inter-vehicle communication module (2), GPS locating module (3), Internet communication module (4) and display screen (6); The display input end of display screen (6) is connected with the display output terminal of control module (1);
Remote information searching platform comprises data storage server (21), database module (22), data processing module (23) and electronic map data module (24) and display module (25);
Data storage server (21) is for receiving the real time traffic data sending from each vehicle-carrying communication; And deposit these data in database module (22);
Database module (22) is for storing the real time traffic data sending from each vehicle-carrying communication, and these data are sent to data processing module (23);
Electronic map data module (24) is for providing electronic map data to data processing module (23);
Data processing module (23), and shows by display module (25) for providing electronic map data to carry out matching treatment for data that database module (22) is sent and electronic map data module (24).
2. the express way driving safety information query system based on VANET according to claim 1, it is characterized in that it also comprises vehicle-mounted data source (7), the vehicle-mounted data signal output part in described vehicle-mounted data source (7) is connected with the vehicle-mounted data signal input part of control module (1).
3. the express way driving safety information query system based on VANET according to claim 1, is characterized in that control module (1) is for embedded microprocessor.
4. the express way driving safety information query system based on VANET according to claim 1, is characterized in that data storage server (21) receives road conditions and weather data that the real time traffic data sending from each vehicle-carrying communication comprises coordinate in electronic chart of driver information, vehicle condition, vehicle, the speed of a motor vehicle, vehicle headway, this car region.
5. the express way driving safety information query method based on VANET based on claim 1, is characterized in that: it is realized by following steps: within a time cycle,
Step 1, requesting query vehicle are broadcasted a requesting query packet by the inter-vehicle communication module (2) of self in presetting range, and this packet comprises ID, request time, the requesting query vehicle position information of inquiry mark, requesting query vehicle, speed and the requesting query vehicle heading of requesting query vehicle;
Step 2, i jump vehicle and judge whether to exceed presetting range, and the initial value of i is 1; If judged result is yes, finish this communication; If judged result is no, perform step 21;
Step 2 one, this i jump vehicle and judge that whether the requesting query vehicle heading in request data package is identical with the vehicle heading of self, if judged result is yes, perform step two or two; If judged result is no, finish this communication;
Step 2 two, this i jump vehicle and judges in request data package, whether the spacing of i-1 jumping vehicle position information and the vehicle position information of self is greater than preset value D, wherein the 0th jumping vehicle position information is requesting query vehicle position information, if judged result is yes, finish this communication; If judged result is no, i jumps vehicle Forward-reques information and performs step two or three;
Step 2 three, this i jump vehicle and send response data packet, oppositely forward until be forwarded to requesting query vehicle according to the route that receives request data package; Described response data packet comprises the ID of vehicle, the information of vehicles of vehicle, the driver information of vehicle, the driving duration of vehicle, the position of vehicle, the speed of vehicle, the travel direction information of vehicle, records feedback path simultaneously;
Step 2 four, make i=i+1, and return to execution step two;
Complete after this time cycle,
Step 3, requesting query vehicle carry out data processing by all response data packet that receive, and show on display screen; Complete an express way driving safety information inquiry;
Same vehicle is only processed once the id information of same vehicle within a time cycle.
6. the express way driving safety information query method based on VANET according to claim 5, it is characterized in that when each vehicle carries out data broadcast or data retransmission, request data package or response data packet are forwarded in the data storage service module of remote information searching platform simultaneously.
7. the express way driving safety information query method based on VANET according to claim 5, is characterized in that the information of vehicles of the vehicle in response data packet comprises natural information, the speed of a motor vehicle and the relative position of vehicle; Wherein, the natural information of vehicle comprises: vehicle, the total milimeter number of Vehicle Driving Cycle and vehicle working condition; The speed of a motor vehicle comprises the actual vehicle speed of surrounding vehicles, and the relative speed of a motor vehicle of center car and surrounding vehicles; Relative position is the relative position of central vehicle and surrounding vehicles.
8. the express way driving safety information query method based on VANET according to claim 5, is characterized in that the driver information of the vehicle in response data packet comprises driver's age, sex and the driving age.
9. the express way driving safety information query method based on VANET according to claim 6, is characterized in that the driver information in response data packet obtains by vehicle-mounted bar code scanning device scan driver's driver's license; The driving duration of vehicle obtains by vehicle-mounted counter.
10. the express way driving safety information query method based on VANET according to claim 5, is characterized in that also comprising in response data packet driver's fatigue strength data, and the preparation method of described fatigue strength data is:
Adopt camera collection eye image, then according to image recognition technology, obtain eyes closed degree, time and frequency, as fatigue strength data.
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