CN102426778A - Road traffic condition representing system and method based on vehicle positions - Google Patents
Road traffic condition representing system and method based on vehicle positions Download PDFInfo
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- CN102426778A CN102426778A CN2011103452897A CN201110345289A CN102426778A CN 102426778 A CN102426778 A CN 102426778A CN 2011103452897 A CN2011103452897 A CN 2011103452897A CN 201110345289 A CN201110345289 A CN 201110345289A CN 102426778 A CN102426778 A CN 102426778A
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Abstract
The invention relates to a road traffic condition representing system and method based on vehicle positions. The representing system mainly comprises a user terminal, a transmission network and a server, wherein the user terminal is any one terminal of a navigation terminal, a mobile phone and a computer and is mainly responsible for collecting vehicle operating position information and representing a point diagram of the road traffic condition; the user terminal comprises a user data memory, an information receiving module, an information transmitting module, a navigation management system module, an electronic map management module, a GPS (Global Positioning System) module, an operating position collecting module and a point diagram data drawing module; the transmission network is any one of WiMax (Worldwide Interoperability for Microwave Access), WiFi (Wireless Fidelity) and GPRS (General Packet Radio Service) wireless transmission network; the server of a traffic information service centre generally comprises a point diagram database, an information receiving module, an information transmitting module and a point diagram data management module.
Description
Technical field
What the present invention relates to is a kind of road traffic condition method for expressing and expression system based on vehicle location, belongs to collection and the expression system and the method for expressing of Traffic Information.
Background technology
Along with deepening continuously of urbanization development, increasing people moves towards the city from the rural area, and the road in city also seems more and more crowded along with the increase of urban population, has become " first stifled " like Beijing by the capital, has to carry out " restricted driving " of family car; The vehicle " restricted driving " in rush hour has sooner or later also been had to take in the Hangzhou recently.Therefore, people drive total hope can be on not stifled urban road, and in case on urban road, block up, just people's mood can ruin, not only as watch, also can influence honest jump, studying and living.Along with the use of traffic navigation appearance, drive to provide a lot of convenience to the vehicle driver, especially the driver in other places arrives a new city; Utilize the traffic navigation appearance; Just can look for the destination like a cork, but existing navigating instrument also only is a kind of navigation function, but is at a complete loss as to what to do for the road is stifled; In case it is stifled that the road takes place; The driver also can only wait for the current of road patiently, and therefore, present driver is badly in need of a kind of can resemble the navigating instrument can represent instrument to the road traffic condition that the jam situation of urban road is carried out information gathering and issue.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists; And provide a kind of road traffic condition to represent system and method for expressing based on vehicle location; It is a point diagram information of utilizing road traffic condition; The user can according to the magnitude of traffic flow, traffic flow speed and traffic flow density and between incidence relation, carry out whether traffic block up artificial or judge automatically.
The objective of the invention is to accomplish through following technical scheme, the road traffic condition based on vehicle location of the present invention is represented system, and it mainly is made up of user terminal, transmission network and server three parts, wherein:
Described user terminal is any one terminal of navigation terminal, mobile phone, computer, mainly is responsible for the collection of vehicle operating positional information and the point diagram of road traffic condition and representes; In user terminal, comprise: user data internal memory, information receiving module, information sending module, Navigation Management System module, electronic chart administration module, GPS module, run location acquisition module and some diagram data drafting module;
Described transmission network is any in WiMax, WiFi, the GPRS wireless-transmission network;
Generally comprise in the server at described traffic-information service center: some chart database, information receiving module, information sending module and point diagram data management module.
In the user terminal of the present invention, said user data internal memory is used to store map datum, navigation route information, the some diagram data of user terminal, and the necessary memory source of running software space is provided;
Said information receiving module is responsible for listening port, and from the packet of server acceptance point diagram data;
Said information sending module can connect the distribution port resource for the user, and SOCKET connection status on the detection port is closed choke-out and connected, and sends the packet of the run location information of user terminal collection to server;
Said GPS module functions is to read gps data, and data are carried out efficiency analysis, extracts longitude and latitude, the velocity information of vehicle then, satellite information etc., and terrible interface to last GPS positional information is provided;
Said run location information acquisition module is responsible for administering and maintaining of information acquisition strategy, and obtains run location information from the GPS module at interval according to the traffic acquisition time of setting;
The electronic chart administration module is the basis of GIS engine; The management of main charge map data; Carry out mapping and demonstration, the point-line-surface information when mapping being provided and showing, difference is corresponding facility in the map datum (comprising common elements such as hotel, market); Road (all roads in city), and zone (comprising massif, lake surface etc.); In addition, the road information when navigation is provided comprises road section information, direction information and intersection information;
The Navigation Management System module can be according to electronic map data; And the user sets information such as starting point, terminal point, transit point and carries out the planning of guidance path; And operations such as dynamically change in the path in the responsible navigation procedure, map convergent-divergent, also be responsible for coordinating the electronic chart administration module and put the mutual of diagram data drafting module.
Traffic-information service of the present invention center, some chart database wherein are used to store the run location information of the user terminal uploads of each vehicle, and gather the back and become a some diagram data;
Said information receiving module is responsible for listening port, and receives the packet of run location information from user terminal;
Said information sending module connects the distribution port resource for the user, and SOCKET connection status on the detection port is closed choke-out and connected, and sends the packet of some diagram data to user terminal;
Said point diagram data management module has been accomplished the parsing of the packet of the run location information of the user terminal uploads of each vehicle and has been gathered, and forms the packet of point diagram data message.
Described road traffic condition method for expressing based on vehicle location, it comprises the steps:
Step 1; Be utilized in the user terminal that is provided with on the travels down vehicle; Run location information acquisition module through wherein and the run location information of obtaining the GPS of vehicle on road through the GPS module in real time; The run location information of vehicle on road comprises the longitude information and the latitude information at vehicle place, and velocity information;
Step 2; The information sending module of the user terminal of each vehicle encapsulates the packet that forms run location information with the real time execution positional information that is collected with the traffic of setting update time at interval, and packet is transferred to the server at traffic-information service center through transmission network;
The packet of the real time execution positional information of each vehicle that step 3, the information receiving module of the server at traffic-information service center will receive on road sends to the point diagram data management module of the server at traffic-information service center; Point diagram data management module by the server at traffic-information service center is resolved the run location information that obtains vehicle according to the message definition of packet; Gather then and form real-time road traffic condition point diagram data, and the packet that the information sending module of the server through the traffic-information service center will real-time road traffic condition point diagram data passes through Network Transmission and arrives user terminal;
Step 4, the information receiving module of user terminal sends to a diagram data drafting module with the road traffic condition point diagram data that receives; Point diagram data drafting module is according to the current path planning information of Navigation Management System module; And the map datum of the peripheral path of electronic chart administration module; Extraction needs the point diagram data message of drafting, and is illustrated on the electronic chart of user terminal with the point diagram mode; When representing road traffic condition, represent the position of a car with at least one point, or use the position of representing a vehicle with the vehicle similar sign, be described on the electronic chart of user terminal with the point diagram mode.
The acquisition process of run location information according to the invention is:
At first, the run location information acquisition module calls the GPS module, and carries out the initialization of GPS module; During initialization, the GPS module generates the instance objects of a CAppSystem_GPS, comes initialization to read the GPS serial ports through calling member function Init (), and starts new process circulation and read and resolve gps data information;
Then; Reading perhaps from file, serial ports reads GPS information; And resolve; Be stored in the static structure variable, and send the window information of validity that includes Current GPS information and the satellite number that receives to registered window, circulation is as above operated up to wrong generation (not comprising overtime reason) or other reasons and is withdrawed from circulation.
Traffic of the present invention is defaulted as per renewal in 5 seconds once update time at interval, also can upgrade according to the time interval that the run location information acquisition module of user terminal is set.
The information sending module of user terminal of the present invention is following through the process that wireless-transmission network sends run location information: the information sending module of user terminal is carried out port assignment; Message format according to the run location information packet carries out data encapsulation; And the information transmission process of startup user terminal, carry out packet and send.Sending packet, the transmission worker thread number of acquiescence is 2, and carries out overtime detection, and generally surpassing 100 seconds with duration serves as that transmission is overtime.
The point diagram data management module of the server at traffic-information service of the present invention center gathers the run location information of each vehicle of each vehicle in the corresponding time period on road according to spacing parameter update time of set point diagram data, forms the packet of real-time road traffic condition point diagram data;
The point diagram data management module whenever receives the run location packet of a vehicle, updating real-time road traffic condition point diagram data; The road traffic condition point diagram is the sub-grid point diagram by grid dividing; The point diagram data that sends to user terminal is to carry out piecemeal according to grid.When the position of operational vehicle changes, need to upgrade point diagram, inquire the pointer address of user's point diagram mid point according to Customs Assigned Number, directly the cloud atlas point is done and upgraded operation.
The concrete grammar of step 4 is: at first, the information sending module of the server at traffic-information service center arrives real-time road traffic condition point diagram data the information receiving module of user terminal through Network Transmission; Secondly, the information receiving module of user terminal navigates to position corresponding on the road-map according to the longitude and the latitude information of the GPS that receives the current run location of each vehicle in the real-time road traffic condition point diagram data; At last, user terminal is designated as the operational vehicle point with at least one point or other similar symbols of vehicle at the corresponding position subscript of above-mentioned electronic chart, and being illustrated in has vehicle going on this position.
The present invention is a point diagram information of utilizing road traffic condition, the user can according to the magnitude of traffic flow, traffic flow speed and traffic flow density and between incidence relation, carry out whether traffic block up artificial or judge automatically; It is convenient and reliable, practical that it has system's composition, can obtain and react road traffic state apace, and the distribute traffic path resource is practiced thrift social cost preferably, reduces society and consume, and satisfies the characteristics such as needs that people are developed urbanization process.
Description of drawings
Fig. 1 is a system architecture synoptic diagram of the present invention.
Fig. 2 is a vehicle operating positional information acquisition process schematic block diagram of the present invention.
Fig. 3 is the active thread schematic block diagram of point diagram data management module according to the invention.
Embodiment
To combine accompanying drawing and embodiment that the present invention is done detailed introduction below: shown in Figure 1; Road traffic condition based on vehicle location of the present invention is represented system; It mainly is made up of user terminal 1, transmission network 2 and server 3 three parts; Wherein: described user terminal 1 is any one terminal of navigation terminal, mobile phone, computer, mainly is responsible for the collection of vehicle operating positional information and the point diagram of road traffic condition and representes; In user terminal, comprise: user data internal memory 8, information receiving module 4, information sending module 7, Navigation Management System module 5, electronic chart administration module 6, GPS module 9, run location acquisition module 10 and some diagram data drafting module 11;
Described transmission network 2 is any in WiMax, WiFi, the GPRS wireless-transmission network;
Generally comprise in the server 3 at described traffic-information service center: some chart database 12, information receiving module 13, information sending module 15 and point diagram data management module 14.
In the user terminal of the present invention, said user data internal memory 8 is used to store map datum, navigation route information, the some diagram data of user terminal 1, and the necessary memory source of running software space is provided;
Said information receiving module 4 is responsible for listening ports, and from the packet of server 3 acceptance point diagram datas;
Said information sending module 7 can connect the distribution port resource for the user, and SOCKET connection status on the detection port is closed choke-out and connected, and sends the packet of the run location information of user terminal collection to server 3;
The major function of said GPS module 9 is to read gps data, and data are carried out efficiency analysis, extracts longitude and latitude, the velocity information of vehicle then, satellite information etc., and terrible interface to last GPS positional information is provided;
Said run location information acquisition module 10 is responsible for administering and maintaining of information acquisition strategy, and obtains run location information from GPS module 9 at interval according to the traffic acquisition time of setting;
Electronic chart administration module 6 is bases of GIS engine; The management of main charge map data; Carry out mapping and demonstration, the point-line-surface information when mapping being provided and showing, difference is corresponding facility in the map datum (comprising common elements such as hotel, market); Road (all roads in city), and zone (comprising massif, lake surface etc.); In addition, the road information when navigation is provided comprises road section information, direction information and intersection information;
Navigation Management System module 5 can be according to electronic map data; And the user sets information such as starting point, terminal point, transit point and carries out the planning of guidance path; And operations such as dynamically change in the path in the responsible navigation procedure, map convergent-divergent, also be responsible for coordinating electronic chart administration module 6 and put the mutual of diagram data drafting module 11.
The server 3 at traffic-information service of the present invention center, some chart database 12 wherein are used to store the run location information of the user terminal uploads of each vehicle, and gather the back and become a some diagram data;
Said information receiving module 13 is responsible for listening port, and receives the packet of run location information from user terminal;
Said information sending module 15 connects the distribution port resource for the user, and SOCKET connection status on the detection port is closed choke-out and connected, and sends the packet of some diagram data to user terminal 1 through wireless-transmission network 2;
Said point diagram data management module 14 accomplished the run location information that the user terminal 1 of each vehicle is uploaded packet parsing and gather, and form the packet of point diagram data message.
Described road traffic condition method for expressing based on vehicle location, it comprises the steps:
Step 1; Be utilized in the user terminal 1 that is provided with on the travels down vehicle; Run location information acquisition module 10 through wherein and the run location information of obtaining the GPS of vehicle on road through GPS module 9 in real time; The run location information of vehicle on road comprises the longitude information and the latitude information at vehicle place, and velocity information;
Step 2; The information sending module 7 of the user terminal 1 of each vehicle encapsulates the packet that forms run location information with the real time execution positional information that is collected with the traffic of setting update time at interval, and packet is transferred to the server 3 at traffic-information service center through transmission network 2;
Step 3, the packet of the real time execution positional information of each vehicle that the information receiving module 13 of the server 3 at traffic-information service center will receive on road sends to the point diagram data management module 14 of the server 3 at traffic-information service center; Point diagram data management module 14 by the server 3 at traffic-information service center is resolved the run location information that obtains vehicle according to the message definition of packet; Gather then and form real-time road traffic condition point diagram data, and the information sending module 15 of the server 3 through the traffic-information service center is transferred to user terminal with the packet of real-time road traffic condition point diagram data through transmission network 2;
Step 4, the information receiving module 4 of user terminal 1 sends to a diagram data drafting module 11 with the road traffic condition point diagram data that receives; Point diagram data drafting module 11 is according to the current path planning information of Navigation Management System module 5; And the map datum of the peripheral path of electronic chart administration module 6; Extraction needs the point diagram data message of drafting, and is illustrated on the electronic chart of user terminal with the point diagram mode; When representing road traffic condition, represent the position of a car with at least one point, or use the position of representing a vehicle with the vehicle similar sign, be described on the electronic chart of user terminal with the point diagram mode.
As shown in Figure 2, the acquisition process of run location information according to the invention is: at first, run location information acquisition module 10 calls the GPS module, and carries out the initialization of GPS module 9; During initialization, GPS module 9 generates the instance objects of a CAppSystem_GPS, comes initialization to read the GPS serial ports through calling member function Init (), and starts new process circulation and prepare to read gps data information;
Then; Reading perhaps from file, serial ports reads GPS information; And resolve; Be stored in the static structure variable, and send the window information of validity that includes Current GPS information and the satellite number that receives to registered window, circulation is as above operated up to wrong generation (not comprising overtime reason) or other reasons and is withdrawed from circulation.
Traffic of the present invention is defaulted as per renewal in 5 seconds once update time at interval, also can upgrade according to the time interval that the run location information acquisition module 10 of user terminal 1 is set.
The information sending module 7 of user terminal 1 of the present invention is following through the process that transmission network 2 sends run location information: the information sending module 7 of user terminal is carried out port assignment; Message format according to the run location information packet carries out data encapsulation; And the information transmission process of startup user terminal 1, carry out packet and send.Sending packet, the transmission worker thread number of acquiescence is 2, and carries out overtime detection, and generally surpassing 100 seconds with duration serves as that transmission is overtime.
The point diagram data management module 14 of the server 3 at traffic-information service of the present invention center gathers the run location information of each vehicle of each vehicle in the corresponding time period on road according to spacing parameter update time of set point diagram data, forms the packet of real-time road traffic condition point diagram data;
Point diagram data management module 14 whenever receives the run location packet of a vehicle, updating real-time road traffic condition point diagram data; The road traffic condition point diagram is the sub-grid point diagram by grid dividing; The point diagram data that sends to user terminal 1 is to carry out piecemeal according to grid.When the position of operational vehicle changes, need to upgrade point diagram, inquire the pointer address of user's point diagram mid point according to Customs Assigned Number, the cloud atlas point is done upgraded operation.
The active thread of point diagram data management module 14 is as shown in Figure 3, comprising: run location receiving thread 23, point diagram more new thread 24, point diagram send thread 25 and main thread 28, and point diagram address lookup table 26 and point diagram tables of data 27.
Main thread 28 is responsible for run location receiving thread 23, point diagram more new thread 24, point diagram transmission thread 25, and the scheduling and the management of point diagram address lookup table 26 and point diagram tables of data 27.Run location receiving thread 23 is acquisition point diagram data information from the receipts dique 21 of the information receiving module 13 of the server 3 at traffic-information service center; In point diagram address lookup table 26, inquire the pointer address of user's point diagram mid point according to Customs Assigned Number, and point diagram tables of data 27 is done renewal operate.Point diagram send thread 25 be responsible for the information sending module 15 of the server that sends to the traffic-information service center 3 of up-to-date some diagram data send out dique 22, send to user terminal 1 by the information sending module 15 of server 3.
The concrete grammar of step 4 is: at first, the information sending module 15 of the server 3 at traffic-information service center is transferred to real-time road traffic condition point diagram data the information receiving module 4 of user terminal through transmission network 2; Secondly, the information receiving module 4 of user terminal 1 navigates to position corresponding on the road-map according to the longitude and the latitude information of the GPS that receives the current run location of each vehicle in the real-time road traffic condition point diagram data; At last, other similar symbols of at least one point of user terminal 1 usefulness or vehicle are designated as the operational vehicle point at the corresponding position subscript of above-mentioned electronic chart, and being illustrated in has vehicle going on this position.
The traffic of point diagram mode representes that synoptic diagram is as shown in Figure 3.The position and the density information of the operational vehicle point that from the electronic chart of user terminal, is marked can embody real-time traffic information intuitively.When in map, representing operational vehicle, can use one or more symbols such as round dot, rectangle, car icon to represent.
Generally speaking, map datum is a unit with each city, divides city data description file and the concrete data file in city.
L is the city data description file wherein: naming method is the mode that (10 bit digital) adds " .cmf " suffix, the essential information in record city in description document.Each city has an ID, is 1022 like Hangzhou, and then its city data description file is by name: 4000001022.Cmf
L and the concrete data file in city is divided into 7 corresponding files: naming method is (10 bit digital, corresponding corresponding city)+(20 bit digital, corresponding corresponding data)+" .cmf ".These 7 concrete data files have been deposited different data message (comprising: point, line, face, road, highway section, crossing and direction information) respectively
As follows like the concrete data message in the city in Hangzhou:
| Filename | Title | Explanation |
| 400000102200411000000000000000 | RoadElement | The highway section |
| 400000102202000300000000000000 | RawArea | The zone |
| 400000102201417000000000000000 | AggregaredRoad | Road |
| 400000102202000100000000000000 | RawPoint | The point |
| 400000102202000200000000000000 | RAWLINE need not | Line |
| 400000102200411051010000000000 | Manoeuvre | Direction information |
| 400000102200412000000000000000 | Junction | The crossing |
When carrying out the point diagram drafting; The information receiving module 4 of user terminal 1 navigates to the map datum point midway according to the longitude of the GPS that receives the current run location of each vehicle in the real-time road traffic condition point diagram data and latitude information and matees; And on electronic chart administration module 6 bases, add point diagram information.Electronic chart administration module 6 has encapsulated and has shown the significant data that drafting is required; Like DC, bitmap handle, current up-sizing, draw the magnitude of traffic flow point of pel etc.; Adopt the method for layering to organize data, will have same meaning, the things of attribute is organized on one deck; Make every layer to pay close attention to different focuses, also help the more coherent demonstration of drawing engine simultaneously.Geography information during electronic chart is drawn extracts different levels according to the difference of attribute, is divided into the soil and utilizes situation (greenery patches, desert), sea level elevation, street, magnitude of traffic flow point etc.
In the map delamination process, can define many levels, and be the relevant drawing attribute of each layer definition, like the color of this layer fill area, road color, character script, observability threshold value etc.Every layer every attribute needs to take the circumstances into consideration according to actual needs to select, and is unlikely to seem disorderly and unsystematic so that on narrow and small embedded screen, draw the map that comes out, and lacks the branch of primary and secondary.
The user checks the traffic that the point diagram mode is showed through any one user terminals 1 such as navigation terminal, mobile phone, computers; Thereby understand vehicle fleet size, the vehicle density degree of road; And the travel speed situation of vehicle; And pass through the traffic that the autonomous method of judging is judged road, to obtain judgement to traffic.
When judging the traffic of road, the user can be according to trip zone, trip period, and daily traffic, judges the congestion of road traffic according to the subjective desire of self; Also can be the road traffic condition judged result that the wish by the user terminal anthropomorphic dummy obtains, or the judged result of the road traffic condition that obtains by certain congestion in road recognizer etc.
Generally can carry out traffic flow through the magnitude of traffic flow, traffic flow speed and traffic flow density is quantitatively described.The magnitude of traffic flow is claimed the volume of traffic again, and the vehicle fleet size of section is specified in the expression traffic flow through road in the unit interval, and unit is/hour or/day; Traffic flow speed is called for short flow velocity, the speed that the expression traffic flow is flowed, unit be meter per second or kilometer/hour; Traffic flow density, the density degree of expression traffic flow promptly contains the quantity of vehicle on the unit road length, and unit is/kilometer.Relation between 3 parameters of traffic flow is: the magnitude of traffic flow is the product of traffic flow speed and traffic flow density.
Utilize the point diagram information of road traffic condition, the user can according to the magnitude of traffic flow, traffic flow speed and traffic flow density and between incidence relation, carry out whether traffic block up artificial or judge automatically.
Claims (9)
1. the road traffic condition based on vehicle location is represented system, and it mainly is made up of user terminal, transmission network and server three parts, it is characterized in that wherein:
Described user terminal is any one terminal of navigation terminal, mobile phone, computer, mainly is responsible for the collection of vehicle operating positional information and the point diagram of road traffic condition and representes; In user terminal, comprise: user data internal memory, information receiving module, information sending module, Navigation Management System module, electronic chart administration module, GPS module, run location acquisition module and some diagram data drafting module;
Described transmission network is any in WiMax, WiFi, the GPRS wireless-transmission network;
Generally comprise in the server at described traffic-information service center: some chart database, information receiving module, information sending module and point diagram data management module.
2. the road traffic condition based on vehicle location according to claim 1 is represented system; It is characterized in that in the described user terminal; Said user data internal memory is used to store map datum, navigation route information, the some diagram data of user terminal, and the necessary memory source of running software space is provided;
Said information receiving module is responsible for listening port, and from the packet of server acceptance point diagram data;
Said information sending module can connect the distribution port resource for the user, and SOCKET connection status on the detection port is closed choke-out and connected, and sends the packet of the run location information of user terminal collection to server;
Said GPS module functions is to read gps data, and data are carried out efficiency analysis, extracts longitude and latitude, the velocity information of vehicle then, satellite information etc., and terrible interface to last GPS positional information is provided;
Said run location information acquisition module is responsible for administering and maintaining of information acquisition strategy, and obtains run location information from the GPS module at interval according to the traffic acquisition time of setting;
The electronic chart administration module is the basis of GIS engine; The management of main charge map data; Carry out mapping and demonstration, the point-line-surface information when mapping being provided and showing, difference is corresponding facility in the map datum (comprising common elements such as hotel, market); Road (all roads in city), and zone (comprising massif, lake surface etc.); In addition, the road information when navigation is provided comprises road section information, direction information and intersection information;
The Navigation Management System module can be according to electronic map data; And the user sets information such as starting point, terminal point, transit point and carries out the planning of guidance path; And operations such as dynamically change in the path in the responsible navigation procedure, map convergent-divergent, also be responsible for coordinating the electronic chart administration module and put the mutual of diagram data drafting module.
3. the road traffic condition based on vehicle location according to claim 1 is represented system; It is characterized in that traffic-information service of the present invention center; Point chart database wherein is used to store the run location information of the user terminal uploads of each vehicle, and gathers the back and become a some diagram data;
Said information receiving module is responsible for listening port, and receives the packet of run location information from user terminal;
Said information sending module connects the distribution port resource for the user, and SOCKET connection status on the detection port is closed choke-out and connected, and sends the packet of some diagram data to user terminal;
Said point diagram data management module has been accomplished the parsing of the packet of the run location information of the user terminal uploads of each vehicle and has been gathered, and forms the packet of point diagram data message.
4. utilization such as claim 1 or 2 or 3 described road traffic conditions based on vehicle location are represented the method for expressing of system, it is characterized in that it comprises the steps:
Step 1; Be utilized in the user terminal that is provided with on the travels down vehicle; Run location information acquisition module through wherein and the run location information of obtaining the GPS of vehicle on road through the GPS module in real time; The run location information of vehicle on road comprises the longitude information and the latitude information at vehicle place, and velocity information;
Step 2; The information sending module of the user terminal of each vehicle encapsulates the packet that forms run location information with the real time execution positional information that is collected with the traffic of setting update time at interval, and packet is transferred to the server at traffic-information service center through transmission network;
The packet of the real time execution positional information of each vehicle that step 3, the information receiving module of the server at traffic-information service center will receive on road sends to the point diagram data management module of the server at traffic-information service center; Point diagram data management module by the server at traffic-information service center is resolved the run location information that obtains vehicle according to the message definition of packet; Gather then and form real-time road traffic condition point diagram data, and the packet that the information sending module of the server through the traffic-information service center will real-time road traffic condition point diagram data passes through Network Transmission and arrives user terminal;
Step 4, the information receiving module of user terminal sends to a diagram data drafting module with the road traffic condition point diagram data that receives; Point diagram data drafting module is according to the current path planning information of Navigation Management System module; And the map datum of the peripheral path of electronic chart administration module; Extraction needs the point diagram data message of drafting, and is illustrated on the electronic chart of user terminal with the point diagram mode; When representing road traffic condition, represent the position of a car with at least one point, or use the position of representing a vehicle with the vehicle similar sign, be described on the electronic chart of user terminal with the point diagram mode.
5. the road traffic condition method for expressing based on vehicle location according to claim 4 is characterized in that the acquisition process of said run location information is:
At first, the run location information acquisition module calls the GPS module, and carries out the initialization of GPS module; During initialization, the GPS module generates the instance objects of a CAppSystem_GPS, comes initialization to read the GPS serial ports through calling member function Init (), and starts new process circulation and read and resolve gps data information;
Then; Reading perhaps from file, serial ports reads GPS information; And resolve; Be stored in the static structure variable, and send the window information of validity that includes Current GPS information and the satellite number that receives to registered window, circulation is as above operated up to wrong generation (not comprising overtime reason) or other reasons and is withdrawed from circulation.
6. the road traffic condition method for expressing based on vehicle location according to claim 4; It is characterized in that described traffic is defaulted as per renewal in 5 seconds once update time at interval, also can upgrade according to the time interval that the run location information acquisition module of user terminal is set.
7. the road traffic condition method for expressing based on vehicle location according to claim 4; The information sending module that it is characterized in that described user terminal is following through the process that wireless-transmission network sends run location information: the information sending module of user terminal is carried out port assignment; Message format according to the run location information packet carries out data encapsulation; And the information transmission process of startup user terminal, carry out packet and send; Sending packet, the transmission worker thread number of acquiescence is 2, and carries out overtime detection, and generally surpassing 100 seconds with duration serves as that transmission is overtime.
8. the road traffic condition method for expressing based on vehicle location according to claim 4; The point diagram data management module that it is characterized in that the server at described traffic-information service center gathers the run location information of each vehicle of each vehicle in the corresponding time period on road according to spacing parameter update time of set point diagram data, forms the packet of real-time road traffic condition point diagram data;
The point diagram data management module whenever receives the run location packet of a vehicle, updating real-time road traffic condition point diagram data; The road traffic condition point diagram is the sub-grid point diagram by grid dividing; The point diagram data that sends to user terminal is to carry out piecemeal according to grid; When the position of operational vehicle changes, need to upgrade point diagram, inquire the pointer address of user's point diagram mid point according to Customs Assigned Number, directly the cloud atlas point is done and upgraded operation.
9. the road traffic condition based on vehicle location according to claim 4 is represented system; The concrete grammar that it is characterized in that step 4 is: at first, the information sending module of the server at traffic-information service center arrives real-time road traffic condition point diagram data the information receiving module of user terminal through Network Transmission; Secondly, the information receiving module of user terminal navigates to position corresponding on the road-map according to the longitude and the latitude information of the GPS that receives the current run location of each vehicle in the real-time road traffic condition point diagram data; At last, user terminal is designated as the operational vehicle point with at least one point or other similar symbols of vehicle at the corresponding position subscript of above-mentioned electronic chart, and being illustrated in has vehicle going on this position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110345289.7A CN102426778B (en) | 2011-11-04 | 2011-11-04 | Road traffic condition representing system and method based on vehicle positions |
Applications Claiming Priority (1)
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| CN106233353A (en) * | 2014-05-29 | 2016-12-14 | 英派尔科技开发有限公司 | Remotely drive auxiliary |
| CN104680820A (en) * | 2015-02-12 | 2015-06-03 | 浙江大学 | Traffic flow car networking system and traffic flow control method based on gradient field |
| CN105931457A (en) * | 2015-02-26 | 2016-09-07 | 福特全球技术公司 | Methods and systems to determine and communicate driver performance |
| CN107851396A (en) * | 2015-07-31 | 2018-03-27 | 罗伯特·博世有限公司 | The distribution of transport information |
| CN105160717A (en) * | 2015-08-21 | 2015-12-16 | 深圳市金溢科技股份有限公司 | Traffic cloud service method, system, subsystem, vehicle-mounted unit and network terminal |
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| CN108171968A (en) * | 2017-11-29 | 2018-06-15 | 江苏速度信息科技股份有限公司 | The road condition analyzing system and method for position data based on mobile terminal device signaling |
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