CN103090880A - Car navigation system, method and device - Google Patents
Car navigation system, method and device Download PDFInfo
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- CN103090880A CN103090880A CN201310049236XA CN201310049236A CN103090880A CN 103090880 A CN103090880 A CN 103090880A CN 201310049236X A CN201310049236X A CN 201310049236XA CN 201310049236 A CN201310049236 A CN 201310049236A CN 103090880 A CN103090880 A CN 103090880A
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Abstract
The invention provides a car navigation system, method and device. The car navigation system comprises an information receiving module, a position matching module, a road condition analysis and path planning modifying model and an active path change guiding module, wherein the information receiving module is used for receiving information of current driving position, the car speed, the direction, the longitude and latitude, the current driving road condition, and the like; the position matching module is used for determining whether the current driving position is matched with a navigation path destination; the road condition analysis and path planning modifying model is used for carrying out subsequent interactions and calculation to obtain an analysis result of the forward path condition according to the information received by the information receiving module, and is used for calculating again according to the analysis result so as to submit a path planning modifying conclusion; and the active path change guiding module is used for providing path change selection to a car owner according to the conclusion of the road condition analysis and path planning modifying model. By utilizing the car navigation system, road congestion is avoided for the car owner.
Description
Technical field
The present invention relates to a kind of automobile mounted field, specifically, relate to a kind of onboard navigation system and method and device thereof.
Background technology
The Chinese city especially road traffic of big and medium-sized cities blocks up and becomes now in car owner's daily life very outline.The car owner is in driving procedure, and the modes such as notice, the prompting of congestion in road direction board that broadcast by the radio station are adjusted the vehicle line of oneself, avoid running into the problem of blocking up and can't advance as far as possible.But adjust drive route by these modes, subject matter has following 2 points:
1, input information is fuzzy, for example reports by the radio station, and the direction board prompting can only for the district road situation, can't directly be pointed out for the single information point of car owner;
2, the information real-time is relatively poor, present various prompting mode all adopts wide regional coverage to report substantially, traffic information is longer from the time cycle that information acquisition is delivered to the information issue, and the ageing requirement of driving is very high, and it is inconsistent or deviation arranged in the road conditions of issuing time point to the actual road conditions of region that result has produced actual driving.
Based on this defective, domestic navigator company is by research and development, the real-time road condition information prompt facility has been incorporated in the navigation driving procedure, and the car owner can check the circuit congestion status by the travel route of planning, can check also that in the process of travelling the circuit real-time road adjusts drive route.Market existing procucts based on this technology have the capable navigation of smooth E.The smooth capable navigation of E is superimposed upon real-time road on map, and use the light beam that blocks up that navigates in navigation procedure, and utilize the form of red, yellow, and green to show the traffic behavior on the drive route, make the car owner can select voluntarily to change circuit, navigator recomputates circuit, with quick arrival destination.But there is following problem in this kind technical approach:
1, drive and to exist congestion to keep away starting the navigation circuit planning professional etiquette of advancing on circuit;
2, start navigation procedure after, running into the drive route rear car owner that blocks up can only by checking the light beam state, determine whether the place ahead road conditions block up; Light beam and vehicle line lack corresponding relation, can not check accurately that specifically the existence of which section circuit is blocked up;
3, the car owner finds to block up in navigation, can only switch voluntarily route, and equipment is follow-up to be recomputated.There is certain uncertainty in car owner's circuit switched voluntarily, can not guarantee that the circuit that the car owner selects is rapid line.
Summary of the invention
The technical problem to be solved in the present invention is, can not determine specifically which section circuit blocks up and can not intelligence provide the problems such as circuit switched to the car owner for existing navigation, and a kind of onboard navigation system and method and device thereof are provided.
For achieving the above object, the present invention proposes a kind of onboard navigation system, described onboard navigation system comprises: information receiving module receives current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions information;
The location matches module judges whether the current driving position mates with the guidance path terminal point;
Road condition analyzing and path planning correcting module according to the information that information module receives, carry out follow-up mutual and calculating, draw the analysis result of path, the place ahead road conditions, and again calculate according to analysis result, thereby submit path planning correction conclusion to; And
Initiatively the path change bootstrap module, according to the conclusion of road condition analyzing and path planning correcting module, offer the car owner and carry out the path change selection.
According to embodiments of the invention, wherein said information receiving module receives information by global positioning system signal and data link signal.
For achieving the above object, the invention allows for a kind of method of vehicle mounted guidance, comprising: step 1, start navigation, make each functional module, module initialization;
Step 2, in real time according to global positioning system signal and data link signal, acquisition current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions information, and will obtain current driving road conditions information, as computation model data input basis;
Step 3 judges whether the current driving position mates with the guidance path terminal point; If current driving position and guidance path terminal point coupling, navigation is completed, and enters step 4; If does not mate with the navigation terminal point current driving position, enter step 5;
Step 4 finishes navigation, and each functional module, module are destroyed;
Step 5, real-time road condition information by the nearest timing node that obtains is input, offers road condition analyzing and path planning correcting module and carries out follow-up alternately and calculate, and draws the analysis result of path, the place ahead road conditions, and again calculate according to analysis result, to submit path planning correction conclusion to;
Step 6, if showing, path planning correction conclusion need not to revise the path, rebound step 2 continues in real time according to global positioning system signal and data link signal, obtains current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions information; Need to revise the path if path planning correction conclusion shows, enter step 7;
Step 7 starts initiatively path change guiding or auxiliary with voice, indication ejection layer or the highlighted mode of light beam message segment, initiatively offers the car owner and carries out the path change selection.
According to embodiments of the invention, the cycle of obtaining of wherein said global positioning system signal is the GPS satellite receiving equipment cycle; The cycle of obtaining of described data link signal is 2 ~ 5 minutes.
According to embodiments of the invention, the current location that wherein said road condition analyzing and path planning correcting module obtain by analysis is put the real-time road data of terminal point, in conjunction with current navigation vehicle line, and the highway section road conditions analysis-by-synthesis of navigating, and according to correction algorithm, draw the path modification conclusion.
According to embodiments of the invention, the algorithm of wherein said road condition analyzing and path planning correcting module comprises: according to real-time road data before two minutes, in conjunction with current point in time real-time road data, calculate each minute highway section, first o'clock the place ahead average speed deviation ratio; Calculate average speed and the deviation ratio in whole path, first the place ahead; Calculate whole path road conditions correction benchmark, draw whole path planning correction conclusion.
According to embodiments of the invention, wherein said average speed deviation ratio when whole path greater than the first deviation ratio on the occasion of, or the average speed deviation ratio in whole path less than the first deviation ratio negative value, during less than the second deviation ratio negative value, the conclusion of road condition analyzing and path planning correcting module is that current path planning needs to revise to the average speed deviation ratio that perhaps divides the highway section less than the average speed deviation ratio in the first deviation ratio negative value and whole path; In other situations, the conclusion of road condition analyzing and path planning correcting module is that current path planning need not to revise.
According to embodiments of the invention, wherein said the first deviation ratio is on the occasion of being+50%; Described the first deviation ratio negative value is-50%; Described the second deviation ratio negative value is-30%.
According to embodiments of the invention, the instruction of wherein said reception correction path planning; Obtain alternately with the path planning rear end and revise the path; The voice broadcast prompting; In the highlighted demonstration of navigation displayed page by the path light beam, need to emphasize the highway section, path of change; Perhaps eject the floating layer of dialogue and select whether to support to switch new travel route to the car owner; The car owner is according to above-mentioned prompting correction path.
A kind of device for vehicle mounted guidance comprises: first module, be used for starting navigation, and make each functional module, module initialization;
Second unit, be used in real time according to global positioning system signal and data link signal, acquisition current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions information, and will obtain current driving road conditions information, as computation model data input basis, the cycle of obtaining of described global positioning system signal is the GPS satellite receiving equipment cycle; The cycle of obtaining of described data link signal is 2 ~ 5 minutes;
Unit the 3rd is used for judging whether the current driving position mates with the guidance path terminal point; If current driving position and guidance path terminal point coupling, navigation is completed, and enters Unit the 4th; If does not mate with the navigation terminal point current driving position, enter Unit the 5th;
Unit the 4th is used for finishing navigation, and each functional module, module are destroyed;
Unit the 5th, be used for being input by the real-time road condition information of the nearest timing node that obtains, offer road condition analyzing and path planning correcting module and carry out follow-up mutual and calculating, draw the analysis result of path, the place ahead road conditions, and again calculate according to analysis result, to submit path planning correction conclusion to, wherein said road condition analyzing and path planning correcting module are used for putting by the current location that analysis is obtained the real-time road data of terminal point, and described road condition analyzing and path planning correcting module further comprise:
The first module is used in conjunction with current point in time real-time road data, calculating each minute highway section, vehicle current location the place ahead average speed deviation ratio according to real-time road data before two minutes;
The second module is used for calculating average speed and the average vehicle speed deviation ratio in whole path, vehicle current location the place ahead;
The 3rd module is used for according to whole path road conditions correction benchmark, draws whole path planning correction conclusion, and is wherein said according to whole path road conditions correction benchmark, draws whole path planning correction conclusion and comprises:
When the average speed deviation ratio in whole path greater than the first deviation ratio on the occasion of, or the average speed deviation ratio in whole path less than the first deviation ratio negative value, the average speed deviation ratio that perhaps divides the highway section is less than the average speed deviation ratio in the first deviation ratio negative value and whole path during less than the second deviation ratio negative value, the conclusion of road condition analyzing and path planning correcting module is that current path planning needs to revise, wherein said the first deviation ratio is on the occasion of being+50%, and described the first deviation ratio negative value is-50%; Described the second deviation ratio negative value is-30%;
In other situations, the conclusion of road condition analyzing and path planning correcting module is that current path planning need not to revise;
Unit the 6th, if show for path planning correction conclusion and need not to revise the path, rebound second unit continues in real time according to global positioning system signal and data link signal, obtains current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions information; Need to revise the path if path planning correction conclusion shows, enter Unit the 7th;
Described Unit the 7th, be used for starting initiatively path change guiding, initiatively offer the car owner and carry out the path change selection, wherein in Unit the 7th, initiatively the path change guiding is auxiliary with voice, indication ejection layer or the highlighted mode of light beam message segment, and wherein said Unit the 7th comprises:
Be used for receiving the module of revising the path planning instruction;
Be used for obtaining alternately with the path planning rear end module of revising the path;
The module that is used for the voice broadcast prompting;
Be used for need emphasizing the highway section, path of change in the highlighted demonstration of navigation displayed page by the path light beam; Perhaps eject the floating layer of dialogue and select whether support to switch new travel route to the car owner, select to revise the module in path according to the car owner.
Implement the method for onboard navigation system of the present invention and vehicle mounted guidance, have following beneficial effect: intellectual analysis real-time road in navigation procedure, and positive guide car owner real-time change travel route make the car owner evade the place ahead jam road; Solved navigation light beam and driving line for the clear defective of ambiguity, made the light beam search coverage corresponding one by one with the highway section of travel route; By modes such as assistant voice, Pop-up information indicatings, for providing auxiliary, Intelligent Dynamic change route supports.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in accompanying drawing:
Figure 1A is the schematic diagram of onboard navigation system 50 according to an embodiment of the invention;
Figure 1B is method flow signal Figure 100 of vehicle mounted guidance according to an embodiment of the invention;
Fig. 2 is the method exemplary plot of vehicle mounted guidance according to an embodiment of the invention;
Fig. 3 illustrates according to an embodiment of the invention initiatively path change bootstrap technique process flow diagram 300.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail:
Figure 1A is the schematic diagram of onboard navigation system 50 according to an embodiment of the invention.As shown in Figure 1A, described onboard navigation system 50 comprises: information receiving module 10 receives the information such as current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions; Location matches module 20 judges whether the current driving position mates with the guidance path terminal point; Road condition analyzing and path planning correcting module 30 according to the information that information module 10 receives, carry out follow-up mutual and calculating, draw the analysis result of path, the place ahead road conditions, and again calculate according to analysis result, thereby submit path planning correction conclusion to; And active path change bootstrap module 40, according to the conclusion of road condition analyzing and path planning correcting module 30, offer the car owner and carry out the path change selection.
In one embodiment, information receiving module 10 is by GPS(Global Positioning System, GPS) signal and data link signal reception information.
Figure 1B is method flow signal Figure 100 of vehicle mounted guidance according to an embodiment of the invention.As shown in Figure 1B, described navigation method comprises: step 101, start navigation, and make each functional module, module initialization; Step 102 in real time according to gps signal and data link signal, obtains the information such as current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions, and will obtain current driving road conditions information, and is basic as the input of computation model data; Step 103 judges whether the current driving position mates with the guidance path terminal point; If current driving position and guidance path terminal point coupling, navigation is completed, and enters step 104; If does not mate with the navigation terminal point current driving position, enter step 105; Step 104 finishes navigation, and each functional module, module are destroyed; Step 105, real-time road condition information by the nearest timing node that obtains is input, offer road condition analyzing and path planning correcting module and carry out follow-up mutual and calculating, draw the analysis result of path, the place ahead road conditions, and again calculate according to analysis result, to submit path planning correction conclusion to; Step 106 need not to revise the path if path planning correction conclusion shows, rebound step 102 continues in real time according to gps signal and data link signal, obtains the information such as current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions; Need to revise the path if path planning correction conclusion shows, enter step 107; Step 107 starts initiatively path change guiding, initiatively offers the car owner and carries out the path change selection.
In one embodiment, initiatively the path change guiding is auxiliary in modes such as voice, indication ejection layer or light beam message segment are highlighted.
In one embodiment, the gps signal cycle of obtaining generally is as the criterion with the gps satellite receiving equipment cycle; General 2 ~ 5 minutes of data link signal acquisition cycle.
In one embodiment, the current location that road condition analyzing and path planning correcting module obtain by analysis is put the real-time road data of terminal point, in conjunction with current navigation vehicle line, and the highway section road conditions analysis-by-synthesis of navigating, and according to correction algorithm, draw the path modification conclusion.
In one embodiment, the real-time route road conditions are to take in the highway section as the data iteration intersection of unit, path (whole path) from first o'clock (starting point or current point) to second point (terminal point) exist N minute highway section (first minute highway section, second minute highway section ..., N divides the highway section), each minute, the highway section comprised some traffic informations, and wherein N is natural number.Position code (LocationCode) is passed through as unique identification in the highway section, the position code corresponding road section, the division in highway section is take road traffic or crossing as unit, therefore, the path is comprised of the list (List) of N position code attribute, and each position code is the attribute that the highway section comprises following example:
Position code: XXX; Road name: " XXX road "; , average speed; " the XX km/hour "; Path: " XX rice "; Highway section attribute: " XXX ".
Wherein the highway section attribute comprises through street, trunk roads, secondary distributor road and branch road.
In one embodiment, the real-time road data were upgraded in 2 minutes.Traffic state according to current path planning, the algorithm of road condition analyzing and path planning correcting module comprises: 1, according to real-time road data before 2 minutes, in conjunction with current point in time real-time road data, calculate each minute highway section, first o'clock the place ahead average speed deviation ratio; 2, calculate average speed and the average vehicle speed deviation ratio in whole path, first the place ahead; 3, according to whole path road conditions correction benchmark, draw whole path planning correction conclusion.
Wherein the highway section (is divided as i, the average speed deviation ratio V of 1≤i≤N) in the highway section each minute
Offset_iBy the highway section very first time this minute some t1 average speed V
T1_iWith the second time point t2 average speed V
T2_iDetermine, wherein the time interval of very first time point t1 and the second time point t2 is 2 minutes.Specifically, its formula is
The driving T consuming time that divides the highway section
iPath L by this minute highway section
i, this minute highway section average speed V
iWith this minute highway section Attribute Weight value P
iDetermine.Specifically, its computing formula is:
（2）
Wherein, highway section attribute weights P
iFor: through street P
i=0; Trunk roads P
i=0; Secondary distributor road P
i=0.1; Branch road P
i=0.2.
The average speed V in whole path is by overall path length L and each highway section driving T consuming time
iSummation determines.Specifically, its computing formula is:
（3）
The average speed deviation ratio V in whole path
OffsetAverage speed deviation ratio V with minute highway section
Offset_iThe same, also by whole path very first time point average speed V
t1With whole path the second time point average speed V
t2Determine, wherein the time interval of very first time point t1 and the second time point t2 is 2 minutes.Specifically, its formula is:
The average speed of point t1 may be larger than the average speed of the second time point t2 due to the very first time, also may be less than the average speed of the second time point t2, so the average speed deviation ratio V in above-mentioned minute highway section
Offset_iAverage speed deviation ratio V with whole path
OffsetMight be all on the occasion of or negative value.Average speed deviation ratio V when whole path
OffsetFor on the occasion of the time, represent that the whole road conditions trend of current path is good, the average speed that travels increases; Anyway, as the average speed deviation ratio V in whole path
OffsetDuring for negative value, represent that the whole road conditions trend of current path is abominable, the average velocity that travels reduces.In one embodiment, correction conditions is: the average speed deviation ratio V when whole path
OffsetGreater than the first deviation ratio on the occasion of (as+50%), or the average speed deviation ratio V in whole path
OffsetLess than the first deviation ratio negative value (as-50%), perhaps divide the average speed deviation ratio V in highway section
Offset_iAverage speed deviation ratio V less than the first deviation ratio negative value (as-50%) and whole path
OffsetDuring less than the second deviation ratio negative value (as-30%), the conclusion of road condition analyzing and path planning correcting module is that current path planning needs to revise; In other situations, the conclusion of road condition analyzing and path planning correcting module is that current path planning need not to revise.
Illustrate the principle of work of road condition analyzing and path planning correcting module below in conjunction with Fig. 2.As shown in Figure 2, whole path is for from the A point to the B point, and this integral body path comprises first minute highway section (the A point is to the R1 point), second minute highway section (the R1 point is to the R2 point), the 3rd minute highway section (the R2 point is to the R3 point) and the 4th minute highway section (the R3 point is to the B point).C point in very first time point t1 Vehicle Driving Cycle to the first minute highway section, the D point in the second time point t2 Vehicle Driving Cycle to the second minute highway section.The information of GPS and data link signal acquisition is: the path L in second minute highway section
2Be 0.5 km, highway section attribute P
2Be trunk roads, very first time point t1 average speed V
T1_2Be 40 kms/hour; The path L in the 3rd minute highway section
3Be 2.5 kms, the highway section attribute is P
3Trunk roads, very first time point t1 average speed V
T1_3Be 60 kms/hour, the average speed V of the second time point t2
T2_3Be 10 kms/hour; The path L in the 4th minute highway section
4Be 1.0 kms, highway section attribute P
4Be branch road, the average speed V of very first time point t1
T1_4Be 60 kms/hour, the average speed V of the second time point t2
T2_4Be 70 kms/hour.
According to above-mentioned formula (2), can draw:
1. the very first time is put t1
1) the driving T consuming time in the 3rd minute highway section
T1_3For:
2) the driving T consuming time in the 4th minute highway section
T1_4For:
2. the second time point t2
1) the driving T consuming time in the 3rd minute highway section
T2_3For
2) the driving T consuming time in the 4th minute highway section
T2_4For:
According to formula (3)
A. the very first time is put t1, the average speed V that the R2 point is ordered to B
T1_ R2_BFor:
B. the second time point t2, the average speed V that the R2 point is ordered to B
T2_R2_BFor:
Therefore, can draw each minute highway section in average speed such as the following table 1 of very first time point t1 and the second time point t2:
Table 1
According to formula (4), can draw
The 3rd minute the highway section (the R2 point is to the R3 point) average speed deviation ratio V
Offset_3For
The 4th minute the highway section (the R2 point is to the R3 point) average speed deviation ratio V
Offset_4For
From highway section R2_B(from R2 point to the B point) average speed deviation ratio V
Offset_R2_BFor:
Therefore, can draw the following table 2 of average speed deviation ratio in each minute highway section:
Table 2
According to correction conditions, the average speed deviation ratio V of highway section R2_B
Offset_R2_BBe-77%, less than the first deviation ratio negative value (50%), road condition analyzing and path planning correcting module draw the conclusion that current path planning needs correction.
Fig. 3 illustrates according to an embodiment of the invention initiatively path change bootstrap technique process flow diagram 300.As shown in Figure 3, described active path change bootstrap technique comprises:
Step 301 receives and revises the path planning instruction;
Step 302 is obtained alternately with the path planning rear end and is revised the path;
Step 304 in the highlighted demonstration of navigation displayed page by the path light beam, need to emphasize the highway section, path of change; Perhaps eject the floating layer of dialogue and select whether to support to switch new travel route to the car owner;
Step 305 selects to revise the path according to the car owner.
In one embodiment, described navigation module by the path planning revision directive that gets after, automatically obtain alternately by data link channel and path planning rear end and revise the path.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that do not deviate from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, therefore is intended to be included in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.Any Reference numeral in claim should be considered as limit related claim.In addition, obviously other unit or step do not got rid of in " comprising " word, and odd number is not got rid of plural number.A plurality of unit of stating in system's claim or device also can be realized by software or hardware by a unit or device.
Claims (10)
1. an onboard navigation system, is characterized in that, it comprises:
Information receiving module receives current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions information;
The location matches module judges whether the current driving position mates with the guidance path terminal point;
Road condition analyzing and path planning correcting module according to the information that information module receives, carry out follow-up mutual and calculating, draw the analysis result of path, the place ahead road conditions, and again calculate according to analysis result, thereby submit path planning correction conclusion to; And
Initiatively the path change bootstrap module, according to the conclusion of road condition analyzing and path planning correcting module, offer the car owner and carry out the path change selection.
2. onboard navigation system according to claim 1, is characterized in that, described information receiving module receives information by global positioning system signal and data link signal.
3. the method for a vehicle mounted guidance, is characterized in that, it comprises:
Step 1 starts navigation, makes each functional module, module initialization;
Step 2, in real time according to global positioning system signal and data link signal, acquisition current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions information, and will obtain current driving road conditions information, as computation model data input basis;
Step 3 judges whether the current driving position mates with the guidance path terminal point; If current driving position and guidance path terminal point coupling, navigation is completed, and enters step 4; If does not mate with the navigation terminal point current driving position, enter step 5;
Step 4 finishes navigation, and each functional module, module are destroyed;
Step 5, real-time road condition information by the nearest timing node that obtains is input, offers road condition analyzing and path planning correcting module and carries out follow-up alternately and calculate, and draws the analysis result of path, the place ahead road conditions, and again calculate according to analysis result, to submit path planning correction conclusion to;
Step 6, if showing, path planning correction conclusion need not to revise the path, rebound step 2 continues in real time according to global positioning system signal and data link signal, obtains current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions information; Need to revise the path if path planning correction conclusion shows, enter step 7;
Step 7 starts initiatively path change guiding or auxiliary with voice, indication ejection layer or the highlighted mode of light beam message segment, initiatively offers the car owner and carries out the path change selection.
4. the method for vehicle mounted guidance according to claim 3, is characterized in that, in described step 2, the cycle of obtaining of described global positioning system signal is the GPS satellite receiving equipment cycle; The cycle of obtaining of described data link signal is 2 ~ 5 minutes.
5. the method for vehicle mounted guidance according to claim 3, it is characterized in that, in described step 5, the current location that described road condition analyzing and path planning correcting module obtain by analysis is put the real-time road data of terminal point, in conjunction with current navigation vehicle line, the highway section road conditions analysis-by-synthesis of navigating, and according to modification method, draw the path modification conclusion.
6. the method for vehicle mounted guidance according to claim 5, is characterized in that, the modification method of described road condition analyzing and path planning correcting module comprises:
According to real-time road data before two minutes, in conjunction with current point in time real-time road data, calculate each minute highway section, vehicle current location the place ahead average speed deviation ratio;
Calculate average speed and the average vehicle speed deviation ratio in whole path, vehicle current location the place ahead; According to whole path road conditions correction benchmark, draw whole path planning correction conclusion.
7. the method for vehicle mounted guidance according to claim 6, is characterized in that, according to whole path road conditions correction benchmark, draws whole path planning correction conclusion and comprise:
When the average speed deviation ratio in whole path greater than the first deviation ratio on the occasion of, or the average speed deviation ratio in whole path less than the first deviation ratio negative value, during less than the second deviation ratio negative value, the conclusion of road condition analyzing and path planning correcting module is that current path planning needs to revise to the average speed deviation ratio that perhaps divides the highway section less than the average speed deviation ratio in the first deviation ratio negative value and whole path;
In other situations, the conclusion of road condition analyzing and path planning correcting module is that current path planning need not to revise.
8. the method for vehicle mounted guidance according to claim 7, is characterized in that, wherein said the first deviation ratio is on the occasion of being+50%, and described the first deviation ratio negative value is-50%; Described the second deviation ratio negative value is-30%.
9. the method for vehicle mounted guidance according to claim 3, is characterized in that, described step 7 comprises:
Receive and revise the path planning instruction;
Obtain alternately with the path planning rear end and revise the path;
The voice broadcast prompting;
In the highlighted demonstration of navigation displayed page by the path light beam, need to emphasize the highway section, path of change; Perhaps eject the floating layer of dialogue and select whether support to switch new travel route to the car owner, select to revise the path according to the car owner.
10. a device that is used for vehicle mounted guidance, is characterized in that, it comprises:
First module is used for starting navigation, makes each functional module, module initialization;
Second unit, be used in real time according to global positioning system signal and data link signal, acquisition current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions information, and will obtain current driving road conditions information, as computation model data input basis, the cycle of obtaining of described global positioning system signal is the GPS satellite receiving equipment cycle; The cycle of obtaining of described data link signal is 2 ~ 5 minutes;
Unit the 3rd is used for judging whether the current driving position mates with the guidance path terminal point; If current driving position and guidance path terminal point coupling, navigation is completed, and enters Unit the 4th; If does not mate with the navigation terminal point current driving position, enter Unit the 5th;
Unit the 4th is used for finishing navigation, and each functional module, module are destroyed;
Unit the 5th, be used for being input by the real-time road condition information of the nearest timing node that obtains, offer road condition analyzing and path planning correcting module and carry out follow-up mutual and calculating, draw the analysis result of path, the place ahead road conditions, and again calculate according to analysis result, to submit path planning correction conclusion to, wherein said road condition analyzing and path planning correcting module are used for putting by the current location that analysis is obtained the real-time road data of terminal point, and described road condition analyzing and path planning correcting module further comprise:
The first module is used in conjunction with current point in time real-time road data, calculating each minute highway section, vehicle current location the place ahead average speed deviation ratio according to real-time road data before two minutes;
The second module is used for calculating average speed and the average vehicle speed deviation ratio in whole path, vehicle current location the place ahead;
The 3rd module is used for according to whole path road conditions correction benchmark, draws whole path planning correction conclusion, and is wherein said according to whole path road conditions correction benchmark, draws whole path planning correction conclusion and comprises:
When the average speed deviation ratio in whole path greater than the first deviation ratio on the occasion of, or the average speed deviation ratio in whole path less than the first deviation ratio negative value, the average speed deviation ratio that perhaps divides the highway section is less than the average speed deviation ratio in the first deviation ratio negative value and whole path during less than the second deviation ratio negative value, the conclusion of road condition analyzing and path planning correcting module is that current path planning needs to revise, wherein said the first deviation ratio is on the occasion of being+50%, and described the first deviation ratio negative value is-50%; Described the second deviation ratio negative value is-30%;
In other situations, the conclusion of road condition analyzing and path planning correcting module is that current path planning need not to revise;
Unit the 6th, if show for path planning correction conclusion and need not to revise the path, rebound second unit continues in real time according to global positioning system signal and data link signal, obtains current driving position, the speed of a motor vehicle, direction, longitude and latitude, current driving road conditions information; Need to revise the path if path planning correction conclusion shows, enter Unit the 7th;
Described Unit the 7th, be used for starting initiatively path change guiding, initiatively offer the car owner and carry out the path change selection, wherein in Unit the 7th, initiatively the path change guiding is auxiliary with voice, indication ejection layer or the highlighted mode of light beam message segment, and wherein said Unit the 7th comprises:
Be used for receiving the module of revising the path planning instruction;
Be used for obtaining alternately with the path planning rear end module of revising the path;
The module that is used for the voice broadcast prompting;
Be used for need emphasizing the highway section, path of change in the highlighted demonstration of navigation displayed page by the path light beam; Perhaps eject the floating layer of dialogue and select whether support to switch new travel route to the car owner, select to revise the module in path according to the car owner.
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| CN103090880B (en) | 2016-03-02 |
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