CN101546481B - Navigation and display method based on real time traffic information - Google Patents
Navigation and display method based on real time traffic information Download PDFInfo
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- CN101546481B CN101546481B CN2009103020044A CN200910302004A CN101546481B CN 101546481 B CN101546481 B CN 101546481B CN 2009103020044 A CN2009103020044 A CN 2009103020044A CN 200910302004 A CN200910302004 A CN 200910302004A CN 101546481 B CN101546481 B CN 101546481B
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Abstract
The invention relates to a navigation apparatus and a navigation and display method based on real time traffic information. The invention comprises: navigation apparatus drawing based on the received real time traffic information, wherein the red lines represent jam-up section, yellow lines represent jog-on section and green lines represent passage clear section; computing a plurality of directing paths after considering real time traffic information, taking the path with the lowest traffic expense as a new optimum directing paths for navigation and drawing the directing paths on the navigation map with thick bright lines; finally covering the thin red lines, yellow lines and green lines on the thick bright lines to start directing path prompt.
Description
Technical field
The present invention relates to the method that a kind of guider navigates and shows according to Real-time Traffic Information.
Background technology
TMC is the abbreviation of Traffic Message Channel (TrafficMessage Channel), is the assistant GPS navigation function system in Europe.The whole world mainly contains the TravTek system of three kinds of these type systematic U.S., the VICS system of Japan and the RDS-TMC system in Europe.TMC is a kind of application of FM wireless frequency modulation system (RDS) in reporting real-time traffic and Weather information, and data message is received and decoding by onboard wireless receiving terminal that is equipped with TMC or navigator, conveys to the driver with the whole bag of tricks.
Chinese patent literature CN201069361 discloses a kind of guider that transport information is provided, and it comprises: CPU element, gps receiver, map data base, program data base, touch-screen are controlled the unit and are used for TMC receiver module with the wireless mode receiving traffic information.The CPU element of guider is controlled the unit demonstration by TMC receiver module receiving traffic information and by touch-screen, for the user provides in real time Traffic Information accurately, guider can design or revise existing route according to this transport information, can avoid the highway section of stopping up or avoid inclement weather, realize that navigation is intelligent.
Above-mentioned the deficiencies in the prior art part is: the problem of traffic jam is not that simply to only limit to calculate the navigation Service of an optimal path just soluble in the reality, when meeting with obstruction on the best road that calculates, the user more wishes to walk around this road and continues to move ahead.And find a road that does not block fully in the reality is the comparison difficulty, for example in peak period on and off duty, each bar road in city often all is in blocked state, how to allow user's time and driving path of waiting for well of overall arrangement better, guaranteeing the navigation Service quality of guider, is the technical matters that those skilled in the art will solve.
Summary of the invention
Technical matters to be solved by this invention provides the method that a kind of guider navigates and shows according to Real-time Traffic Information, so that when road meets with obstruction, make the user can obtain the comparatively ideal path of detouring, the time of again can overall arrangement waiting for well, guarantee the navigation Service quality.
For solving the problems of the technologies described above, the method that guider of the present invention navigates and shows according to Real-time Traffic Information comprises:
1., the CPU element of guider receives Real-time Traffic Information by the TMC receiver, and in the map image of the current demonstration of display device, depict corresponding Real-time Traffic Information, it comprises: describe congested link with redness, describe the highway section of walking or drive slowly with yellow, green is described unimpeded highway section;
2., CPU element calculates many path of navigation that are made of a plurality of highway sections by starting point, destination and the described Real-time Traffic Information of user's input, and the current cost in each highway section in each bar path of navigation, draw total current cost of each bar path of navigation at last, and be best path of navigation with a total current minimum path of navigation of cost;
3., guider is according to described best path of navigation generation guiding interface, to carry out the real-time route guiding; Wherein, draw described best path of navigation with thicker highlighted line drawing, and on described thicker high bright line, be coated with the congested link of representing with thinner red lines, the jogging highway section of representing with thinner yellow line, the unimpeded highway section of representing with thinner green lines;
4., CPU element judges whether there is de novo obstacle in the 10Km of the place ahead on current path of navigation according to Real-time Traffic Information; If there is an obstacle, then CPU element is obtained the data of description of this obstacle place road by map data base, generates the expanded view of described obstacle place road and the Real-time Traffic Information on the drawing path by preset ratio; When described obstacle was road closed or accident obstruction, then CPU element calculated many new path of navigation that are made of a plurality of highway sections that are suitable for walking around described obstacle; CPU element will always be passed through the lower new path of navigation of 1-3 bar of cost by showing or the user is informed in voice suggestion, and by the new path of navigation access path guiding of last of selecting of user interface; Or CPU element will always be passed through the minimum new path of navigation of cost automatically as new best path of navigation, and access path guiding interface, simultaneously draw described new best path of navigation with thicker highlighted line drawing, and on this thicker high bright line, be coated with the congested link of representing with thinner red lines, the jogging highway section of representing with thinner yellow line, the unimpeded highway section of representing with thinner green lines.
The present invention has positive effect with respect to prior art: the method that (1) guider of the present invention navigates and shows according to Real-time Traffic Information, at first the path computing guiding user of consideration adding TMC avoids stopping up and arrives the destination faster, secondly when there is obstruction in the Lu Jingzhong prediction of recommending, can remind user group to arrange the stand-by period, at last new recommendation paths and block information are reflected in this route map, point out the user more intuitively.Be that the present invention has finished path computing, processes such as prediction intelligence and path contrast.(2) after receiving TMC information (Real-time Traffic Information), navigating instrument is at first depicted traffic information in map, represents to block with redness, represents jogging with yellow, green expression unimpeded (model realizes by setting up); Calculate and consider to add the later recommendation paths of TMC information, expressing recommendation paths with thicker high bright line; Owing to painted recommendation paths, so just covered the traffic information of original drafting, so recommending to draw traffic information again one time on the road with highlighted line drawing; The user can see that traffic information can see recommendation paths again like this, and whether he can clearerly judge recommendation paths reasonable.
Description of drawings
Fig. 1 is the circuit structure block diagram of guider among the embodiment 1;
Fig. 2 is the program flow diagram that guider shows the Real-time Traffic Information on obstacle place road and the drawing path among the embodiment 1 with expanded view;
Fig. 3 is the path computing process flow diagram of guider among the embodiment 1;
Fig. 4 is the process flow diagram that guider is estimated traffic jam among the embodiment 1 according to Real-time Traffic Information;
Fig. 5 is the path contrast process flow diagram of guider among the embodiment 1;
Fig. 6 adopts red, the yellow and green program flow diagram that shows the road that blocks up, jogging road and unimpeded road respectively for guider according to Real-time Traffic Information.
Embodiment
(embodiment 1)
See Fig. 1, the guider of present embodiment comprises: CPU element 1, being used for of linking to each other with CPU element 1 determine from the GPS unit 5 in path, car end place, the display control circuit 8 and the map generative circuit 9 of the TMC receiver 2 that is used to receive Real-time Traffic Information road conditions on the described path with real-time judge that links to each other with CPU element 1, the map data base 4 that is used to provide the road description data that links to each other with CPU element 1, the confession display device that is used to generate the Real-time Traffic Information on expanded view and the drawing path 3 demonstrations that link to each other with CPU element 1; Also comprise: by running distance sensor, angular-rate sensor and the vehicle speed sensor that interface circuit links to each other with CPU element 1, ROM, RAM that links to each other with CPU element 1 and voice loudspeaker 6.
The method that the guider of present embodiment navigates and shows according to Real-time Traffic Information comprises:
1., the CPU element 1 of guider receives Real-time Traffic Information by TMC receiver 2, and in the map image of the current demonstration of display device 3, depict corresponding Real-time Traffic Information, it comprises: describe congested link with redness, describe the highway section of walking or drive slowly with yellow, green is described unimpeded highway section;
2., CPU element 1 calculates many path of navigation that are made of a plurality of highway sections by starting point, destination and the described Real-time Traffic Information of user's input, and the current cost in each highway section in each bar path of navigation, draw total current cost (being the current cost sum in each highway section) of each bar path of navigation at last, and be best path of navigation with a total current minimum path of navigation of cost;
3., guider is according to described best path of navigation generation guiding interface, to carry out the real-time route guiding; Wherein, draw described best path of navigation with thicker highlighted line drawing, and on described thicker high bright line, be coated with the congested link of representing with thinner red lines, the jogging highway section of representing with thinner yellow line, the unimpeded highway section of representing with thinner green lines;
4., CPU element 1 judges whether there is de novo obstacle (being the Link incident) in the place ahead 10Km (also can be 15Km or 5Km, also can be set up on their own by the user) on current path of navigation according to Real-time Traffic Information; If there is an obstacle, then CPU element 1 is obtained the data of description of this obstacle place road by map data base 4, generates the expanded view of described obstacle place road and the Real-time Traffic Information on the drawing path by preset ratio; When described obstacle was road closed or accident obstruction, then CPU element 1 calculated many new path of navigation that are made of a plurality of highway sections that are suitable for walking around described obstacle; CPU element 1 will always be passed through the lower new path of navigation of 1-3 bar of cost by showing or the user is informed in voice suggestion, and by the new path of navigation access path guiding of last of selecting of user interface; Or CPU element 1 will always be passed through the minimum new path of navigation of cost automatically as new best path of navigation, and access path guiding interface, simultaneously draw described new best path of navigation with thicker highlighted line drawing, and on this thicker high bright line, be coated with the congested link of representing with thinner red lines, the jogging highway section of representing with thinner yellow line, the unimpeded highway section of representing with thinner green lines.
Above-mentioned steps 4. in, if not having the new path of navigation and the described obstacle that are suitable for walking around described obstacle is that accident is blocked or jogging, then CPU element 1 estimates the time that described accident is blocked or the jogging obstacle is disengaged according to described Real-time Traffic Information, calculate simultaneously under unimpeded state by the place ahead accident and block or the jogging required time of highway section, and the form contrast with little frame shows in the upper right corner of display device 3; The map data base 4 that while CPU element 1 basis links to each other with CPU element 1 retrieves a plurality of points of interest or the leisure place that is adjacent to current location and shows, so that the user goes to described point of interest, lie fallow field or service area, and the time that its overall arrangement is waited for well.Therefore, the present invention can make the user obtain the comparatively ideal path of detouring, and again the time that its overall arrangement is waited for well, has guaranteed the navigation Service quality.
Above-mentioned steps 4. in, if described obstacle is jogging, then CPU element 1 estimates by the required time of described jogging highway section according to described Real-time Traffic Information, calculate simultaneously under unimpeded state by the required time of this jogging highway section, and in the upper right corner of display device 3 with the form contrast demonstration of little frame; In addition, CPU element 1 calculates a plurality of corrigendum path of navigation that are suitable for walking around described jogging highway section, and calculates total current cost of respectively correcting path of navigation, and CPU element 1 will always be passed through the minimum corrigendum path of navigation of cost automatically as current path of navigation.
Form with little frame contrasts the recommendation road that is presented at the recommendation road after considering transport information and does not consider transport information on the navigation interface that display device 3 shows simultaneously, thereby the prompting user is in the superiority of the recommendation paths of considering to calculate after the transport information.
The factor that described total current cost is calculated comprises: the current cost sum of the current cost of road and incident; The related factor of current cost of described road comprises: category of roads attribute, road width attribute, road section length attribute, speed limiting attribute and paying attribute (referring to whether exist factors such as charge station); The related factor of current cost of described incident comprises: road closed, accident are blocked and jogging.For example, on a certain road, exist some to be in track in the construction, thereby cause this highway section to be in the jogging state.Can estimate by the required time of this jogging highway section according to factors such as the category of roads in the track quantity of the construction state that is in the unit distance or density, length and this highway section, total number of track-lines, width.
When in map image, describing Real-time Traffic Information,, then adopt corresponding road closed symbol and accident to block symbol and be presented on the corresponding highway section for the highway section that road closed, accident are blocked.
There is map datum in the memory device of vehicle navigator, these data presentation form map image on display screen, above-mentioned map datum also comprises some point of interest address informations, it usually is the major address of internal ratio, the higher or certain region of relevant frequency of utilization, these point of interest address informations are called point of interest, they can be identified out on map image, and can be by the user in the enterprising row-column list of omniselector, inquiry, when the user need can carry out setting operation when wherein certain point of interest address is as navigation destination easily.
See Fig. 3,, be set at different value, thereby when path computing, avoid the highway section that traffic events takes place for those fully by the difference of transport information to the influence of road driving.
Concrete implementation procedure is:
(1) at first judges and whether load TMC Link data message the Real-time Traffic Information of TMC receiver 2 (promptly from);
(2) analyze the current cost of road then, wherein the current cost of normal road mainly calculates by attributes such as category of roads, road width, speed limits; The current cost of incident road is determined by the medium different factors of road closed and road construction.The current cost (Const) of road closed (Ramp Closed) is infinitely great.A passage is blocked up comprises that accident is blocked and jogging.Wherein the Const of accident obstruction mainly is a calculating treatmenting time, and the Const of jogging mainly is the estimation traffic capacity.Two kinds of infeasible and jogging are arranged, the infeasible road closed that promptly can be regarded as in the road construction.
Utilize dijkstra's algorithm to calculate from the car end optimal path to the destination end, more whether there are two different recommendation paths, if existing and just need comparing that paths is optimal path, method relatively mainly is to wait comprehensively by mileage, time and expense to compare.Wherein mileage be meant from from the car end to the destination end shortest path that travels, time be from from the car end to the required shortest time of destination end, expense comprises two aspects: charge expense and oil consumption expense, the charge expense comprises the extra cost that the road has more through charge station and expressway mileage increase etc., and the oil consumption expense is by road passage capability and mileage decision.
See Fig. 4, can find according to the daily life rule, peak period on and off duty at ordinary times, road is in not too unimpeded state basically, is especially running into rainy day, and traffic is not smooth especially.Under the situation that can not find a clog-free road, people have only wait.Yet people can select reasonably to go to arrange the stand-by period of this section.For example, can when running into obstruction, remove supermarket shopping, rather than on road, wait for.
See Fig. 5, the path computing that adds TMC obtains new recommendation paths, just needs to determine that new path of recommending is more excellent than original recommendation paths, and will point out the user to use new recommendation paths.At first judge and whether have new recommendation paths.Secondly in order to make the user obtain the information that traffic jam is taken a devious route more intuitively, the twice different recommendation paths in front and back can be drawn different colors, and, need detour, thereby realization is to the intelligent navigation of vehicle with voice and captions prompting user road ahead obstruction.See Fig. 6, after CPU element 1 receives TMC information (being Real-time Traffic Information),, represent to block up with redness according to the computation model of blocking up of setting up in advance, jogging, unimpeded road, yellow expression jogging, green expression is unimpeded; Information analysis goes out the situation in each highway section to CPU element 1 according to TMC, and describes corresponding highway section with above-mentioned three kinds of colors, with the traffic in each path of demonstration directly perceived.And for traffic hazard etc., if vehicle is impassable, then need come out with the symbolic representation of a traffic hazard in this position.Immediately draw out the color of line segment and indicate traffic hazard point position.Road information on the through street direction board that blocks up is exactly a drafting the simplest, also can adopt the LED lamp to send different colors according to the road form, represents unimpeded, information such as walk or drive slowly, block up, and still adopts red, yellow and green expression.
Claims (4)
1. the method for navigating and showing according to Real-time Traffic Information comprises the steps:
1., the CPU element of guider (1) receives Real-time Traffic Information by TMC receiver (2), and in the map image of the current demonstration of display device (3), depict corresponding Real-time Traffic Information, it comprises: describe congested link with redness, describe the highway section of walking or drive slowly with yellow, green is described unimpeded highway section;
2., CPU element (1) calculates many path of navigation that are made of a plurality of highway sections by starting point, destination and the described Real-time Traffic Information of user's input, and the current cost in each highway section in each bar path of navigation, draw total current cost of each bar path of navigation at last, and be best path of navigation with a total current minimum path of navigation of cost;
3., guider is according to described best path of navigation generation guiding interface, to carry out the real-time route guiding; Wherein, draw described best path of navigation with thicker highlighted line drawing, and on described thicker high bright line, be coated with the congested link of representing with thinner red lines, the jogging highway section of representing with thinner yellow line, the unimpeded highway section of representing with thinner green lines;
4., CPU element (1) judges whether there is de novo obstacle in the 10Km of the place ahead on current path of navigation according to Real-time Traffic Information; If there is an obstacle, then CPU element (1) is obtained the data of description of this obstacle place road by map data base (4), generates the expanded view of described obstacle place road and the Real-time Traffic Information on the drawing path by preset ratio; When described obstacle was road closed or accident obstruction, then CPU element (1) calculated many new path of navigation that are made of a plurality of highway sections that are suitable for walking around described obstacle; CPU element (1) will always be passed through the lower new path of navigation of 1-3 bar of cost by showing or the user is informed in voice suggestion, and by the new path of navigation access path guiding of last of selecting of user interface; Or CPU element (1) will always be passed through the minimum new path of navigation of cost automatically as new best path of navigation, and access path guiding interface, simultaneously draw described new best path of navigation with thicker highlighted line drawing, and on this thicker high bright line, be coated with the congested link of representing with thinner red lines, the jogging highway section of representing with thinner yellow line, the unimpeded highway section of representing with thinner green lines; Above-mentioned steps 4. in, if not having the new path of navigation and the described obstacle that are suitable for walking around described obstacle is that accident is blocked or jogging, then CPU element (1) estimates the time that described accident is blocked or the jogging obstacle is disengaged according to described Real-time Traffic Information, calculate simultaneously under unimpeded state by the place ahead accident and block or the jogging required time of highway section, and the form contrast with little frame shows in the upper right corner of display device (3); CPU element (1) retrieves a plurality of points of interest or the leisure place that is adjacent to current location according to the map data base (4) that links to each other with CPU element (1) and shows simultaneously.
2. the method for navigating and showing according to claim 1 according to Real-time Traffic Information, it is characterized in that: above-mentioned steps 4. in, if described obstacle is jogging, then CPU element (1) estimates by the required time of described jogging highway section according to described Real-time Traffic Information, calculate simultaneously under unimpeded state by the required time of this jogging highway section, and in the upper right corner of display device (3) with the form contrast demonstration of little frame; In addition, CPU element (1) calculates a plurality of corrigendum path of navigation that are suitable for walking around described jogging highway section, and calculating total current cost of respectively correcting path of navigation, CPU element (1) will always be passed through the minimum corrigendum path of navigation of cost automatically as current path of navigation.
3. the method for navigating and showing according to Real-time Traffic Information according to claim 1 is characterized in that: the factor that described total current cost is calculated comprises: the current cost sum of the current cost of road and incident; The related factor of current cost of described road comprises: category of roads attribute, road width attribute, road section length attribute, speed limiting attribute and paying attribute; The related factor of current cost of described incident comprises: road closed, accident are blocked and jogging.
4. the method for navigating and showing according to claim 1 according to Real-time Traffic Information, it is characterized in that: when in map image, describing Real-time Traffic Information, for the highway section that road closed, accident are blocked, then adopt corresponding road closed symbol and accident to block symbol and be presented on the corresponding highway section.
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