CN101086806A - A system and method for onboard terminal based on traffic information grid platform - Google Patents
A system and method for onboard terminal based on traffic information grid platform Download PDFInfo
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Abstract
A vehicle borne terminal system and method based on traffic information network platform comprises the traffic information network as the back stage to provide timely traffic information, vehicle borne computer from Shenzhou Longxin network computer and touch display, with the processor of No.1 of the LongXin using MIPS instruction collection, linking with the parallel input and output together with the display, connecting the signal collection device and radio modulator through two RS232 serial port and GPS, the vehicle borne terminal communicating with the back traffic information grid timely through the radio communication network to realize all kinds of front and back services. It not only completes all kinds of front services, but also displays the overall timely status of the road based on the dynamic navigating service and moving yellow page.
Description
Technical field
The present invention relates to a kind of system and method for the car-mounted terminal based on traffic information grid platform.
Background technology
In recent years,, begin to come into the market based on the auto navigation product of GPS navigation and map datum matching technique along with the chip manufacturing cost that develops rapidly with GPS of microelectric technique descends rapidly, and rapid growth.Because huge market potential and immeasurable development prospect, nearly all in the world automobile production producer has all participated in this high-tech and has contended the new system that only put goods on the market in recent years and just have more than 30.All developed the vehicle mounted guidance product of oneself as companies such as HTC, Nissan, Honda, Mazda, Mitsubishi and the Panasonic of Japan, pioneer, Alpine, Kenwoods; Other developed country such as the U.S., Germany, Holland are unwilling to be lag behind, and try hard to occupy a tiny space in this market.
This present class onboard navigation system all is an independent navigation, and so-called independent navigation is meant except aided positioning system and local data processing, does not need other extraneous assistance can independently finish navigation task.There is significant limitation from principal mode vehicle mounted guidance product: for the road network of complexity, the calculated amount of path planning task is very big, and the computing power of mobile unit is limited, has to manage to avoid the task of intensive, and what the result obtained often is not optimum solution; Function singleness can only provide static navigation Service, and real-time road condition information can not be provided, dynamic information services such as dynamic optimal trip scheme, and impracticable.
Summary of the invention
The object of the present invention is to provide a kind of system and method for the car-mounted terminal based on traffic information grid platform, solved the intensive that traditional system and method is unable to cope with complicated path planning task, the result who obtains often is not an optimum solution; And function singleness, static navigation Service can only be provided, the problem of dynamic information services such as real-time road condition information, dynamic optimal trip scheme can not be provided.
In order to realize above purpose, the invention provides a kind of system of the car-mounted terminal based on traffic information grid platform, it is characterized in that: comprise
Traffic information grid, as the backstage so that real-time transport information to be provided;
Vehicle-mounted computer and touch display device; Divine Land Godson network computer that vehicle-mounted computer adopts the Beijing Shenzhoutianmai Network Computer Co., Ltd to design and develop, vehicle-mounted computer adopts processor of Godson, processor adopting MIPS instruction set; Be connected with the demonstration touch apparatus by parallel input/output port; By being connected of two RS232 serial ports and gps signal collecting device, radio modem;
Communicate by letter by cordless communication network between the cordless communication network, vehicle-mounted computer and backstage traffic information grid server end.
The present invention also provides a kind of method of the car-mounted terminal based on traffic information grid platform, it is characterized in that: comprise
Local service: in of tissue, request, transmission, the storage of vehicle-mounted computer terminal, to realize the local service request to map vector data;
Backstage service: set up corresponding service routine assembly respectively at vehicle-mounted computer terminal and traffic information grid server end, receive and send data with http protocol; The vehicle-mounted computer terminal realizes real-time Communication for Power, request dynamic transport information by cordless communication network and background server end; Backstage traffic information grid server responds this request, handles and send data; The vehicle-mounted computer terminal receives the dynamic road condition data, and draws the variation map that reflects dynamic road condition according to road condition data, finishes backstage service program request.
Wherein, map datum adopts the mode of highway section and node to define the road data structure: all roads are divided into the highway section according to point of crossing and reference position, each point of crossing and starting point are defined as node; Each highway section and node all have spatial data and attribute data two parts information; The spatial data in highway section comprises: the coordinate position of starting point, terminating point, middle key point and adjacent node information; The spatial data of node comprises: coordinate position and adjacent road section information.
Local service comprises: GPS positioning service and geographic information services; The backstage service comprises: dynamic navigation service, dynamic road condition service, mobile yellow pages service.
Wherein, the flow process of described geographic information services is as follows:
A, user click relevant service type, and for example map amplifies, dwindles, inquiry highway section, crossing;
B, input necessary parameter, for example title at highway section, crossing;
The parameter of c, foundation input and the COS of selection are obtained corresponding map datum from the map data management module;
D, according to screen size, draw corresponding geographical information.
Described GPS positioning service comprises the steps: that the gps signal collecting device sent a vehicle latitude and longitude information every one second to vehicle-mounted terminal system, this information is stored in a data file, system obtains the latitude and longitude information of up-to-date vehicle from data file, then with different colors, with this position display on electronic chart, adjust the displaying ratio and the zone of electronic chart simultaneously, make the position display of current vehicle in the centre position of screen.
The flow process of described dynamic navigation service is as follows:
A, user set required parameter, promptly specify starting point, the terminating point of selecting the path, must be through point and path planning attribute; Described path planning attribute is that distance is the shortest or the time is the shortest;
B, the dynamic shortest path request service of calling background server end correspondence, the required parameter that the user is set passes to server end;
C, receive highway section array as the shortest path service result from server end, the highway section array comprises the road segment number in the highway section of shortest path process;
D, calculate the closure rectangle in these highway sections according to this highway section array;
E, the closure rectangle that obtains according to calculating obtain corresponding map datum;
F, employing designated color are drawn shortest path.
The flow process of described dynamic road condition service is as follows:
A, user select the type of road conditions service, and type comprises whole city's road conditions, regional road conditions, major trunk roads road conditions and prediction road conditions;
B, input COS corresponding parameters, wherein regional road conditions need be imported selected zone, and the prediction road conditions need be imported the time interval of prediction;
C, the dynamic road condition request service of calling background server end correspondence, the required parameter that the user is set passes to server end;
D, receive road condition data, comprise road segment number and corresponding road condition information as the dynamic road condition service result from server end;
E, according to the road segment number that obtains and the traffic information in each highway section, show the traffic of each road respectively with the designated color of representing different road conditions;
F, at regular intervals at interval, request dynamic road conditions service is again cancelled service up to the user.
The flow process of described mobile yellow pages service is as follows:
A, user select the type of mobile yellow pages service, comprise parking lot, refuelling station;
The central point of the scope that b, user's selection will be inquired about;
C, with apart from this central point less than the zone of distance to a declared goal as the region of search, call the dynamic road condition request service of background server end correspondence, COS and region of search center position information that the user is set pass to server end;
D, receive data as the mobile yellow pages service result from server end, data content comprises the address of the communal facility in the region of search and the attribute information of communal facility;
Communal facility that demonstration will be inquired about in e, the region of search scope on map and its attribute information;
The size of f, adjustment viewing area.
Beneficial effect of the present invention is: can provide for the car-mounted terminal user on foreground to comprise that overall real-time road shows, based on the dynamic navigation service of real-time traffic and mobile yellow pages etc. in interior traffic-information service.
Description of drawings
Fig. 1 is a vehicle-mounted computer terminal architecture synoptic diagram of the present invention.
Fig. 2 is the schematic flow sheet of dynamic road condition service.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
A kind of system of the car-mounted terminal based on traffic information grid platform is characterized in that: comprise
Traffic information grid, as the backstage so that real-time transport information to be provided;
Vehicle-mounted computer and touch display device; The gps signal collecting device; Radio modem;
Communicate by letter by cordless communication network between the cordless communication network, vehicle-mounted computer and backstage traffic information grid server end.
Divine Land Godson network computer that vehicle-mounted computer adopts the Beijing Shenzhoutianmai Network Computer Co., Ltd to design and develop, vehicle-mounted computer adopts processor of Godson, processor adopting MIPS instruction set; Be connected with the demonstration touch apparatus by parallel input/output port; By being connected of two RS232 serial ports and gps signal collecting device, radio modem; The gps signal collecting device adopts the product M12 series of products of motorola inc, and its companion chip is the radio frequency line circuit chip MRFTC1504 that MOTOROLA company is good at, and based on 32 RTSC controller MCORE of MMC2003; Radio modem adopts CDMA mode and backstage communication, and modulator-demodular unit adopts the CDMA chip of U.S. Goldman Sachs, and truck-mounted computer adopts AT instruction and its communication; Operating system adopts (SuSE) Linux OS, because application software adopts the Java exploitation, system's operation also needs to install JRE (JavaRuntime Environment).The vehicle-mounted computer terminal architecture as shown in Figure 1.
The present invention also provides a kind of method of the car-mounted terminal based on traffic information grid platform, it is characterized in that: comprise
Local service: in of tissue, request, transmission, the storage of vehicle-mounted computer terminal, to realize the local service request to map vector data;
Backstage service: set up corresponding service routine assembly respectively at vehicle-mounted computer terminal and traffic information grid server end, receive and send data with http protocol; The vehicle-mounted computer terminal realizes real-time Communication for Power, request dynamic transport information by cordless communication network and background server end; Backstage traffic information grid server responds this request, handles and send data; The vehicle-mounted computer terminal receives the dynamic road condition data, and draws the variation map that reflects dynamic road condition according to road condition data, finishes backstage service program request.
Wherein, adopt the mode of " highway section/node " to define the road data structure in the map datum design in this vehicle-mounted terminal system, all roads are divided into highway section (Route) according to point of crossing and reference position, each point of crossing and starting point are defined as node (Vertex).Each highway section and node all have spatial data and attribute data two parts information.Spatial data derives from the initial landform data.The spatial data in highway section comprises: the coordinate position of starting point, terminating point, middle key point and adjacent node information.The spatial data of node comprises: coordinate position and adjacent road section information.
Being based upon on car-mounted terminal hardware design, software support environment and the map data management basis is exactly various application services, comprises local service: GPS positioning service and geographic information services; Need carry out mutual service with the backstage traffic information grid: dynamic navigation service, dynamic road condition service, mobile yellow pages service.
Presentation layer is positioned at the superiors of service system structure, and it is responsible for the result of each service is represented to the user by modes such as image, voice, literal.
Wherein, the flow process of described geographic information services is as follows:
A, user click relevant service type, and for example map amplifies, dwindles, inquiry highway section, crossing etc.;
B, input necessary parameter, for example title at highway section, crossing;
The parameter of c, foundation input and the COS of selection are obtained corresponding map datum from the map data management module;
D, according to screen size, draw corresponding geographical information.
Described GPS positioning service comprises the steps: that the gps signal collecting device sent a vehicle latitude and longitude information every one second to vehicle-mounted terminal system, this information is stored in a data file, system obtains the latitude and longitude information of up-to-date vehicle from data file, then with different colors, with this position display on electronic chart, adjust the displaying ratio and the zone of electronic chart simultaneously, make the position display of current vehicle in the centre position of screen.
The flow process of described dynamic navigation service is as follows:
A, user set required parameter, promptly specify starting point, the terminating point of selecting the path, must be through point and path planning attribute;
Described path planning attribute is that distance is the shortest or the time is the shortest;
Distance is the shortest to be exactly to select one from the starting point to the terminating point, and process must be through the shortest paths of distance of point, and the time shortest path planning is a foundation with the current real-time traffic situation in city, selects the shortest path of running time;
B, the dynamic shortest path request service of calling background server end correspondence, the required parameter that the user is set passes to server end;
C, receive highway section array as the shortest path service result from server end, the highway section array comprises the road segment number in the highway section of shortest path process;
D, calculate the closure rectangle in these highway sections according to this highway section array;
E, the closure rectangle that obtains according to calculating obtain corresponding map datum;
F, employing designated color are drawn shortest path.
The flow process of described dynamic road condition service is as follows: (as shown in Figure 2)
A, user select the type of road conditions service, and type comprises whole city's road conditions, regional road conditions, major trunk roads road conditions and prediction road conditions;
B, input COS corresponding parameters, wherein regional road conditions need be imported selected zone, and the prediction road conditions need be imported the time interval of prediction;
C, the dynamic road condition request service of calling background server end correspondence, the required parameter that the user is set passes to server end;
D, receive road condition data, comprise road segment number and corresponding road condition information as the dynamic road condition service result from server end;
E, according to the road segment number that obtains and the traffic information in each highway section, with the traffic of red (obstructions), yellow (crowding), green (unimpeded) three kinds of colors demonstrations road;
F, at regular intervals at interval, request dynamic road conditions service is again cancelled service up to the user.
The flow process of described mobile yellow pages service is as follows:
A, user select the type of mobile yellow pages service, comprise parking lot, refuelling station;
The central point of the scope that b, user's selection will be inquired about;
C, with around this central point one kilometer as the region of search, call the dynamic road condition request service of background server end correspondence, COS and region of search center position information that the user is set pass to server end;
D, receive data as the mobile yellow pages service result from server end, data content is included in the address of one kilometer communal facility in the hunting zone and the attribute information of communal facility;
Communal facility that demonstration will be inquired about in e, the region of search scope on map and its attribute information;
The size of f, adjustment viewing area.
Claims (9)
1, a kind of system of the car-mounted terminal based on traffic information grid platform is characterized in that: comprise
Traffic information grid, as the backstage so that real-time transport information to be provided;
Vehicle-mounted computer and touch display device;
The gps signal collecting device is connected by serial ports with vehicle-mounted computer;
Radio modem is connected by serial ports with vehicle-mounted computer;
Communicate by letter by cordless communication network between the cordless communication network, vehicle-mounted computer and backstage traffic information grid server end.
2, a kind of method of the car-mounted terminal based on traffic information grid platform is characterized in that: comprise
Local service: in of tissue, request, transmission, the storage of vehicle-mounted computer terminal, to realize the local service request to map vector data;
Backstage service: set up corresponding service routine assembly respectively at vehicle-mounted computer terminal and traffic information grid server end, receive and send data with http protocol; The vehicle-mounted computer terminal realizes real-time Communication for Power, request dynamic transport information by cordless communication network and background server end; Backstage traffic information grid server responds this request, handles and send data; The vehicle-mounted computer terminal receives the dynamic road condition data, and draws the variation map that reflects dynamic road condition according to road condition data, finishes backstage service program request.
3, by the method for the described a kind of car-mounted terminal based on traffic information grid platform of claim 2, it is characterized in that: map datum adopts the mode of highway section and node to define the road data structure: all roads are divided into the highway section according to point of crossing and reference position, each point of crossing and starting point are defined as node;
Each highway section and node all have spatial data and attribute data two parts information;
The spatial data in highway section comprises: the coordinate position of starting point, terminating point, middle key point and adjacent node information; The spatial data of node comprises: coordinate position and adjacent road section information.
4, by the method for the described a kind of car-mounted terminal based on traffic information grid platform of claim 2, it is characterized in that: described local service comprises: GPS positioning service and geographic information services; The backstage service comprises: dynamic navigation service, dynamic road condition service, mobile yellow pages service.
5, by the method for the described a kind of car-mounted terminal based on traffic information grid platform of claim 4, it is characterized in that: the flow process of described geographic information services is as follows:
A, user click relevant service type, and for example map amplifies, dwindles, inquiry highway section, crossing;
B, input necessary parameter, for example title at highway section, crossing;
The parameter of c, foundation input and the COS of selection are obtained corresponding map datum from the map data management module;
D, according to screen size, draw corresponding geographical information.
6, method by the described a kind of car-mounted terminal based on traffic information grid platform of claim 4, it is characterized in that: described GPS positioning service comprises the steps: that the gps signal collecting device sent a vehicle latitude and longitude information every one second to vehicle-mounted terminal system, this information is stored in a data file, system obtains the latitude and longitude information of up-to-date vehicle from data file, then with different colors, with this position display on electronic chart, adjust the displaying ratio and the zone of electronic chart simultaneously, make the position display of current vehicle in the centre position of screen.
7, by the method for the described a kind of car-mounted terminal based on traffic information grid platform of claim 4, it is characterized in that: the flow process of described dynamic navigation service is as follows:
A, user set required parameter, promptly specify starting point, the terminating point of selecting the path, must be through point and path planning attribute; Described path planning attribute is that distance is the shortest or the time is the shortest;
B, the dynamic shortest path request service of calling background server end correspondence, the required parameter that the user is set passes to server end;
C, receive highway section array as the shortest path service result from server end, the highway section array comprises the road segment number in the highway section of shortest path process;
D, calculate the closure rectangle in these highway sections according to this highway section array;
E, the closure rectangle that obtains according to calculating obtain corresponding map datum;
F, employing designated color are drawn shortest path.
8, by the method for the described a kind of car-mounted terminal based on traffic information grid platform of claim 4, it is characterized in that: the flow process of described dynamic road condition service is as follows:
A, user select the type of road conditions service, and type comprises whole city's road conditions, regional road conditions, major trunk roads road conditions and prediction road conditions;
B, input COS corresponding parameters, wherein regional road conditions need be imported selected zone, and the prediction road conditions need be imported the time interval of prediction;
C, the dynamic road condition request service of calling background server end correspondence, the required parameter that the user is set passes to server end;
D, receive road condition data, comprise road segment number and corresponding road condition information as the dynamic road condition service result from server end;
E, according to the road segment number that obtains and the traffic information in each highway section, show the traffic of each road respectively with the designated color of representing different road conditions;
F, at regular intervals at interval, request dynamic road conditions service is again cancelled service up to the user.
9, by the method for the described a kind of car-mounted terminal based on traffic information grid platform of claim 4, it is characterized in that: the flow process of described mobile yellow pages service is as follows:
A, user select the type of mobile yellow pages service, comprise parking lot, refuelling station;
The central point of the scope that b, user's selection will be inquired about;
C, with apart from this central point less than the zone of distance to a declared goal as the region of search, call the dynamic road condition request service of background server end correspondence, COS and region of search center position information that the user is set pass to server end;
D, receive data as the mobile yellow pages service result from server end, data content is included in the address of the communal facility in the region of search and the attribute information of communal facility;
Communal facility that demonstration will be inquired about in e, the region of search scope on map and its attribute information;
The size of f, adjustment viewing area.
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