CN103185592A - Vehicle navigation method and vehicle navigation system - Google Patents
Vehicle navigation method and vehicle navigation system Download PDFInfo
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Abstract
The invention provides a vehicle navigation method and a vehicle navigation system, wherein the vehicle navigation method comprises: performing path programming, to form a path form an origin to a destination, wherein the path comprises at least one grade of road; obtaining a pre-estimated vehicle speed corresponding to the road grade; after a vehicle starts, based on the vehicle position change and the time corresponding to the vehicle position change, obtaining an actual vehicle speed corresponding to the grade of the road where the vehicle is; based on the pre-estimated vehicle speed and the actual vehicle speed, obtaining a correction vehicle speed corresponding to the grade of the road where the vehicle is; by the correction vehicle speed, calculating spending time on a road of same grade in a remaining road, to obtain spending time of the vehicle from the current position to the destination; supplying information corresponding to the spending time from the current position to the destination for the vehicle user. The vehicle navigation method and the vehicle navigation system can raise using sensitivity of the user.
Description
Technical field
The present invention relates to technical field of information processing, relate in particular to a kind of automobile navigation method, Vehicular navigation system.
Background technology
Along with the raising day by day of people's living standard, automobile is the more and more important role of performer in people's work and life, and the continuous development of auto industry, the vehicle mounted guidance technology becomes development one of technical field the most fast.
Disclose a kind of guider in publication number is the Chinese patent application of CN101622515A, described guider comprises position detection component, interface, touch panel and computing machine.Wherein,
Computing machine comprises the time set for the timing current time, also comprises the calculation element for Estimated Time of Arrival, and the calculation element of described Estimated Time of Arrival is used for by the described Estimated Time of Arrival of touch panel displays; Described computing machine comprises that also mail generates indicating device and mail sends indicating member, wherein, mail generates indicating device and is used for making portable phone generate mail by interface, described mail comprises the text of notifying Estimated Time of Arrival, described computing machine comprises that also mail sends indicating device, is used for making portable phone to send described mail and generates the mail that indicating device generates.The mode that can need not the driver's operation portable phone is like this shared described Estimated Time of Arrival to other vehicle-mounted ends.
Yet described guider is not analyzed in conjunction with factors such as road conditions in the vehicle driving process when described Estimated Time of Arrival is provided, and such Estimated Time of Arrival is not accurate enough.Especially for long-distance route, because route is long, the road conditions more complicated, Estimated Time of Arrival and actual time of arrival deviation are bigger, and this can reduce user's use susceptibility.
Summary of the invention
The problem that the present invention solves provides automobile navigation method, the Vehicular navigation system that a kind of user of raising uses susceptibility.
For addressing the above problem, the invention provides a kind of automobile navigation method, comprising: carry out path planning, form path from origin to destination, described path comprises the road of at least a grade; Obtain the estimate speed of a motor vehicle corresponding with the grade of road; After vehicle sets out, based on the variation of described vehicle location and the time corresponding with described vehicle location variation, obtain the actual vehicle speed corresponding with the category of roads of vehicle position; Based on the described speed of a motor vehicle, the described actual vehicle speed acquisition correction speed of a motor vehicle corresponding with the category of roads of vehicle position estimated; Calculate the time that the road of same link grade in the driving path not spends by the described correction speed of a motor vehicle, to obtain the time that vehicle spends from the current location to the destination; The information of the time correlation that spends from the current location to the destination with described vehicle is provided to vehicle user.
Alternatively, after described vehicle sets out, based on the variation of described vehicle location and the time corresponding with described vehicle location variation, the step that obtains the actual vehicle speed corresponding with the category of roads of vehicle position comprises: after vehicle sets out, every vehicle location of very first time interval acquiring; Based on each very first time at interval in the corresponding distance of change in location and the very first time ratio at interval of vehicle, obtain the instant speed of a motor vehicle corresponding with the category of roads of vehicle position, with the described instant speed of a motor vehicle as actual vehicle speed.
Alternatively, after described vehicle sets out, based on the variation of described vehicle location and the time corresponding with described vehicle location variation, the step that obtains the actual vehicle speed corresponding with the category of roads of vehicle position comprises: after vehicle sets out, every vehicle location of very first time interval acquiring; Based on a plurality of very first times at interval in vehicle the corresponding distance of change in location and with the ratio of corresponding T.T. at interval of described a plurality of very first times, obtain the average speed corresponding with the category of roads of vehicle position, with described average speed as actual vehicle speed.
Alternatively, after described vehicle sets out, based on the variation of described vehicle location and the time corresponding with described vehicle location variation, the step that obtains the actual vehicle speed corresponding with the category of roads of vehicle position comprises: after vehicle sets out, every vehicle location of very first time interval acquiring; The corresponding distance of change in location and very first time ratio at interval based at interval interior vehicle of each very first time obtain the instant speed of a motor vehicle corresponding with the category of roads of vehicle position; Based on a plurality of very first times instant speed of a motor vehicle at interval and with the very first time at interval the ratio of quantity obtain with vehicle in described a plurality of very first times the average speed at interval, with described average speed as actual vehicle speed.
Alternatively, describedly estimate the step that the speed of a motor vehicle, described actual vehicle speed obtain the correction speed of a motor vehicle corresponding with the category of roads of vehicle position and comprise based on described: obtain the correction speed of a motor vehicle according to the mean value of estimating the speed of a motor vehicle and actual vehicle speed.
Alternatively, describedly estimate the step that the speed of a motor vehicle, described actual vehicle speed obtain the correction speed of a motor vehicle corresponding with the category of roads of vehicle position and comprise based on described: every second time interval, obtain the correction speed of a motor vehicle corresponding with the category of roads of vehicle position based on the described speed of a motor vehicle, described actual vehicle speed estimated, described second interval greater than or equal described very first time interval.
Alternatively, described second time interval is integral multiple at interval of the described very first time.
Alternatively, obtain corresponding with the grade of road estimate the speed of a motor vehicle after, also comprise before vehicle sets out: obtain the time that each grade road spends according to the distance of each grade road and the ratio of estimating the speed of a motor vehicle of each grade road; The time that spends according to each grade road with obtain the vehicle distance time from origin to destination; Provide the described distance time to vehicle user.
Alternatively, describedly provide the step of the information of the time correlation that from the current location to the destination, spends with described vehicle to comprise to vehicle user: to the time that vehicle user provides vehicle to spend from the current location to the destination.
Alternatively, describedly provide the step of the information of the time correlation that from the current location to the destination, spends with described vehicle to comprise to vehicle user: the time that from the current location to the destination, spends based on current time and vehicle and obtain the time that vehicle arrives the destination; Provide described vehicle to arrive the time of destination to vehicle user.
Correspondingly, the present invention also provides a kind of Vehicular navigation system, comprising: guider, be used for carrying out path planning, and form path from origin to destination, described path comprises the road of at least a grade; Estimate the unit, link to each other with described guider, be used for obtaining the estimate speed of a motor vehicle corresponding with the grade of road; The unit tests the speed, link to each other with described guider, be used for obtaining vehicle location from described guider, also be used for changing the corresponding time based on the variation of described vehicle location with described vehicle location, obtain the actual vehicle speed corresponding with the category of roads of vehicle position; Amending unit links to each other with the described unit of estimating with the described unit that tests the speed, and is used for based on the described speed of a motor vehicle, the described actual vehicle speed acquisition correction speed of a motor vehicle corresponding with the category of roads of vehicle position estimated; Time calculating unit links to each other with described amending unit with described guider, is used for calculating the time that the road of driving path same link grade not spends by the described correction speed of a motor vehicle, to obtain the time that vehicle spends from the current location to the destination; Tip element links to each other with described time calculating unit, is used for providing to vehicle user the information of the time correlation that spends from the current location to the destination with described vehicle.
Alternatively, the unit that tests the speed comprises collecting unit and speed computing unit, and wherein, described collecting unit links to each other with described guider, be used for after described vehicle sets out, every between the very first time from described guider every obtaining vehicle location one time; The speed computing unit, link to each other with described collecting unit, be used for the corresponding distance of change in location and very first time ratio at interval based at interval interior vehicle of each very first time, obtain the instant speed of a motor vehicle corresponding with the category of roads of vehicle position, the described instant speed of a motor vehicle is actual vehicle speed.
Alternatively, the unit that tests the speed comprises collecting unit and speed computing unit, and wherein, described collecting unit links to each other with described guider, be used for after described vehicle sets out, every between the very first time from described guider every obtaining vehicle location one time; Described speed computing unit, link to each other with described collecting unit, be used for based on a plurality of very first times at interval in vehicle the corresponding distance of change in location and with the ratio of corresponding T.T. at interval of described a plurality of very first times, obtain the average speed corresponding with the category of roads of vehicle position, with described average speed as actual vehicle speed.
Alternatively, the unit that tests the speed comprises collecting unit and speed computing unit, and wherein, described collecting unit links to each other with described guider, be used for after described vehicle sets out, every between the very first time from described guider every obtaining vehicle location one time; Described speed computing unit links to each other with described collecting unit, is used for the corresponding distance of change in location and very first time interval ratio based at interval interior vehicle of each very first time, obtains the instant speed of a motor vehicle corresponding with the category of roads of vehicle position; Also be used for based on the instant speed of a motor vehicle at interval of a plurality of very first times and with the very first time at interval the ratio of quantity obtain with vehicle in described a plurality of very first times the average speed at interval, with described average speed as actual vehicle speed.
Alternatively, described amending unit is used for obtaining to revise the speed of a motor vehicle according to the described mean value of estimating the speed of a motor vehicle and actual vehicle speed.
Alternatively, described amending unit also comprises the unit that enables that links to each other with described speed computing unit, the described unit that enables is used for triggering described corrected Calculation unit revising the calculating of the speed of a motor vehicle every second time interval, described second interval greater than or equal the described very first time at interval.
Alternatively, described second time interval is integral multiple at interval of the described very first time.
Alternatively, described Vehicular navigation system comprises that also the time estimates the unit, wherein, time is estimated the unit, with described guider with estimate the unit and link to each other, be used for obtaining the time that each grade road spends according to the distance of each grade road and the ratio of estimating the speed of a motor vehicle of each grade road, also be used for time of spending according to each grade road with obtain the vehicle distance time from origin to destination; Tip element is estimated the unit with the described time and is linked to each other, and also is used for providing the described distance time to vehicle user.
Alternatively, described Tip element is used for the time that spends to the vehicle that vehicle user provides time calculating unit to obtain from the current location to the destination.
Alternatively, described time calculating unit also be used for time of from the current location to the destination, spending according to current time and vehicle and obtain the time that vehicle arrives the destination; Described Tip element is used for providing described vehicle to arrive the time of destination to vehicle user.
Compared with prior art, the present invention has the following advantages: according to the speed of a motor vehicle of estimating of category of roads estimation the speed of a motor vehicle is revised before setting out in conjunction with actual vehicle speed, vehicle after setting out, can provide comparatively accurately temporal information to vehicle user, to improve user's use susceptibility.
Description of drawings
Fig. 1 is the schematic flow sheet of automobile navigation method one embodiment of the present invention;
Fig. 2 is the synoptic diagram of Vehicular navigation system one embodiment of the present invention;
Fig. 3 is the synoptic diagram of Vehicular navigation system one embodiment of the present invention;
Fig. 4 is the synoptic diagram of another embodiment of Vehicular navigation system of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Set forth a lot of details in the following description so that fully understand the present invention, implement but the present invention can also adopt other to be different from alternate manner described here, so the present invention has not been subjected to the restriction of following public specific embodiment.
Defective at described in the background technology the invention provides a kind of automobile navigation method, with reference to figure 1, shows the schematic flow sheet of automobile navigation method one embodiment of the present invention, and described automobile navigation method comprises:
Step S1 carries out path planning, forms path from origin to destination, and described path comprises the road of at least a grade;
Step S2 obtains the estimate speed of a motor vehicle corresponding with the grade of road;
Step S3 after vehicle sets out, based on the variation of described vehicle location and the time corresponding with described vehicle location variation, obtains the actual vehicle speed corresponding with the category of roads of vehicle position;
Step S4 is based on the described speed of a motor vehicle, the described actual vehicle speed acquisition correction speed of a motor vehicle corresponding with the category of roads of vehicle position estimated;
Step S5 calculates the time that the road of same link grade in the driving path not spends by the described correction speed of a motor vehicle, to obtain the time that vehicle spends from the current location to the destination;
Step S6 provides the information of the time correlation that spends with described vehicle from the current location to the destination to vehicle user.
According to the speed of a motor vehicle of estimating of category of roads estimation the speed of a motor vehicle is revised before actual vehicle speed, vehicle after combination is set out in the automobile navigation method of the present invention sets out, can be provided comparatively accurately temporal information to vehicle user, to improve user's use susceptibility.
Below each step is elaborated to further describe technical solution of the present invention.
Execution in step S1 carries out path planning, forms path from origin to destination, and described path comprises the road of at least a grade;
Particularly, user wizard boat device provides departure place and destination, and guider carries out path planning, forms path from origin to destination.
Described path is made up of at least one road, road has specific category of roads usually, different categories of roads have specific travel speed, and for example city's category of roads is divided into four classes: through street (travel speed be 60～80 kms/hour), trunk roads (travel speed be 40～60 kms/hour), secondary distributor road (travel speed be 40 kms/hour), branch road (travel speed be 30 kms/hour).Described path comprises a kind of road of category of roads at least.
Execution in step S2 obtains the estimate speed of a motor vehicle corresponding with the grade of road; Particularly, obtain the category of roads of each road in the described path of composition, obtain the travel speed corresponding with category of roads as estimating the speed of a motor vehicle.
For example, described path comprises from A ground to B ground length and is the road a of 10 kms, is 500 meters road b, is the road c of 5 kms from C ground to D ground length that from B ground to C ground length wherein road a and road c are the through street that road b is trunk roads.
Correspondingly, obtain travel speed 60～80 kms of through street/hour as the speed of a motor vehicle of estimating of road a and road c, obtain travel speed 40～60 kms of trunk roads/hour as the speed of a motor vehicle of estimating of road b.
Step S3 after vehicle sets out, based on the corresponding distance of the variation of described vehicle location and the time corresponding with described vehicle location variation, obtains the actual vehicle speed corresponding with the category of roads of vehicle position;
First embodiment of described step S3 can comprise step by step following:
After vehicle sets out, every vehicle location of very first time interval acquiring;
Based on each very first time at interval in the corresponding distance of change in location and the very first time ratio at interval of vehicle, obtain the instant speed of a motor vehicle corresponding with the category of roads of vehicle position, with the described instant speed of a motor vehicle as actual vehicle speed.
Particularly, after vehicle sets out, the car-mounted device of vehicle is (for example 5 minutes) position of obtaining a vehicle at set intervals, formation has the vehicle position data of time attribute, can embody the road conditions problem of its travel in the change in location (travel speed of vehicle in this time interval in other words) of this time interval vehicle.
For example: in 5 minutes, vehicle moves to the F point from the E point of trunk roads, and the distance that the E point is ordered to F is for only being 500 meters, the average overall travel speed of vehicle (6 kms/hour) lower, illustrate that vehicle road conditions just under steam is bad.
And if in 5 minutes, vehicle moves to the G point from the E point of trunk roads, the E point is 5000m to the distance on G point ground, and the average overall travel speed of vehicle (60 kms/hour) is not low, illustrates that the road conditions that vehicle travels is pretty good.
Preferably, the described very first time can be adjusted based on the length in path at interval: the length in path is more long, and the very first time is more long at interval, and the length in path is more short, and the very first time is more short at interval.
The corresponding distance of change in location and very first time ratio at interval by at interval interior vehicle of each very first time, can obtain the instant speed of a motor vehicle corresponding with the category of roads of vehicle position, because the described instant speed of a motor vehicle can embody the road conditions of the road that vehicle travelling, as actual vehicle speed, prepare against follow-up be used to the correction of carrying out Vehicle Speed the described instant speed of a motor vehicle.
Second embodiment of described step S3 can also comprise step by step following:
After vehicle sets out, every vehicle location of very first time interval acquiring;
Based on a plurality of very first times at interval in vehicle the corresponding distance of change in location and with the ratio of corresponding T.T. at interval of described a plurality of very first times, obtain the average speed corresponding with the category of roads of vehicle position, with described average speed as actual vehicle speed.
The difference part of present embodiment and first embodiment is: be based on when present embodiment obtains actual vehicle speed that a plurality of very first times vehicle position data at interval obtains, a plurality of like this very first times at interval in vehicle the corresponding distance of change in location and with described a plurality of very first times at interval the ratio of corresponding T.T. combine interior vehicle travel situations at interval of a plurality of very first times.Can prevent like this that indivedual very first times vehicle travel situations at interval is special and actual vehicle speed that cause can not reflect the problem of the true travel situations of vehicle.
The 3rd embodiment of described step S3 can also comprise step by step following:
After vehicle sets out, every vehicle location of very first time interval acquiring;
The corresponding distance of change in location and very first time ratio at interval based at interval interior vehicle of each very first time obtain the instant speed of a motor vehicle corresponding with the category of roads of vehicle position;
Based on a plurality of very first times instant speed of a motor vehicle at interval and with the very first time at interval the ratio of quantity obtain with vehicle in described a plurality of very first times the average speed at interval, with described average speed as actual vehicle speed.
Present embodiment also is that comprehensive data at interval of a plurality of very first time are analyzed, and actual vehicle speed that cause can not reflect the problem of the true travel situations of vehicle so that the vehicle travel situations that prevents indivedual very first times intervals is special.
Present embodiment is that with the difference part of second embodiment account form of average speed is different, particularly, when having obtained the vehicle position data at very first time interval, calculate the instant speed of a motor vehicle, after obtaining a plurality of instant speed of a motor vehicle, obtain average speed as actual vehicle speed based on the mean value of a plurality of instant speed of a motor vehicle.
Execution in step S4 is based on the described speed of a motor vehicle, the described actual vehicle speed acquisition correction speed of a motor vehicle corresponding with the category of roads of vehicle position estimated.
Because described actual vehicle speed only represents the current road conditions of travelling of vehicle, estimate the speed of a motor vehicle and then represented Vehicle Speed generally, can carry out comprehensively vehicle current driving situation and vehicle travel conditions generally based on described actual vehicle speed and the described erection rate of estimating speed of a motor vehicle acquisition, so that reflect the travel situations of vehicle more realistically.
Particularly, can obtain to revise the speed of a motor vehicle according to the mean value of estimating the speed of a motor vehicle and actual vehicle speed, that is to say that the described correction speed of a motor vehicle equals to estimate half of the speed of a motor vehicle and actual vehicle speed sum.
Need to prove, in other embodiments can also be according to estimating the speed of a motor vehicle and the actual vehicle speed various computing correction speed of a motor vehicle of weight separately, the present invention does not limit this.
Particularly, every second time interval, based on the described speed of a motor vehicle, the described actual vehicle speed acquisition correction speed of a motor vehicle corresponding with the category of roads of vehicle position estimated, the speed of a motor vehicle is revised in (every second time interval) calculating so constantly, with the true travel situations in conjunction with vehicle vehicle is estimated through the time of described path cost.
In order to obtain actual vehicle speed earlier before calculating revising the speed of a motor vehicle, preferably, described second interval greater than or equal the described very first time at interval.For example, described second time interval (10 minutes) is the integral multiple at described very first time interval (5 minutes).
Execution in step S5 calculates the time that the road of same link grade in the driving path not spends by the described correction speed of a motor vehicle, to obtain the time that vehicle spends from the current location to the destination.
Herein, the road of same link grade refers in the described not driving path, from the vehicle current location to the destination, the road identical with the category of roads of vehicle current driving.Because the correction speed of a motor vehicle is based on the actual vehicle speed acquisition of estimating the speed of a motor vehicle and vehicle corresponding with category of roads, the described correction speed of a motor vehicle has the meaning of correction for the road identical with the category of roads of vehicle current driving.
Particularly, obtain the distance sum from the vehicle current location to road identical with the category of roads of vehicle current driving the destination, the ratio by described distance sum and the described correction speed of a motor vehicle obtains the very first time that the road of same link grade in the driving path not spends.
By from the vehicle current location to the ratio of estimating the speed of a motor vehicle corresponding with the distance of the category of roads of vehicle current driving road inequality and its category of roads the destination, obtain second time of other roads costs.
The described very first time and time described second time and that spend from the current location to the destination for vehicle.
Step S6 provides the information of the time correlation that spends with described vehicle from the current location to the destination to vehicle user.
Particularly, to time that vehicle user provides vehicle to spend from the current location to the destination.For example, the time that spends from the current location to the destination is 2 hours.
The time that can also from the current location to the destination, spend based on current time and vehicle and obtain the time that vehicle arrives the destination; Provide described vehicle to arrive the time of destination to vehicle user.For example: the time that spends from the current location to the destination is 2 hours, and the current time is 12 noon, and the information that provides to vehicle user is: the time that vehicle arrives the destination is 2 pm.
Above-described embodiment is in the vehicle driving process, constantly based on actual vehicle speed with estimate the speed of a motor vehicle and revise revising the speed of a motor vehicle, so that the information of the time correlation that spends from the current location to the destination with described vehicle to be provided to vehicle user.
Need to prove that automobile navigation method of the present invention can also obtain the time that each grade road spends according to the distance of each grade road and the ratio of estimating the speed of a motor vehicle of each grade road before vehicle sets out; The time that spends according to each grade road with obtain the vehicle distance time from origin to destination; Provide the described distance time to vehicle user.Can make the user before setting out, just obtain information correlation time like this, the reference frame of departure time can be provided for the user.
Correspondingly, the present invention also provides a kind of vehicle navigation apparatus, with reference to figure 2, shows the synoptic diagram of vehicle navigation apparatus one embodiment of the present invention.Vehicular navigation system of the present invention comprises guider 10, estimates unit 11, the unit 12 that tests the speed, time calculating unit 13, amending unit 14 and Tip element 15, wherein,
Amending unit 14 links to each other with the described unit 11 of estimating with the described unit 12 that tests the speed, and is used for based on the described speed of a motor vehicle, the described actual vehicle speed acquisition correction speed of a motor vehicle corresponding with the category of roads of vehicle position estimated;
In the vehicle navigation apparatus of the present invention, amending unit 14 is revised the speed of a motor vehicle according to the speed of a motor vehicle of estimating of category of roads estimation before setting out in conjunction with actual vehicle speed, vehicle after setting out, can provide comparatively accurately temporal information to vehicle user, to improve user's use susceptibility.
Below in conjunction with specific embodiment technical solution of the present invention is described further.
With reference to figure 3, show the synoptic diagram of Vehicular navigation system one embodiment of the present invention.Vehicular navigation system of the present invention comprises guider 10, estimates unit 11, the unit 12 that tests the speed, time calculating unit 13, amending unit 14 and Tip element 15, wherein,
The unit 12 that tests the speed is used for obtaining actual vehicle speed, and particularly, the described unit 12 that tests the speed comprises collecting unit 121 and speed computing unit 122, wherein,
Collecting unit 121 links to each other with described guider 10, be used for after described vehicle sets out, every the very first time at interval from described guider 10 every obtaining vehicle location one time; For example, the described very first time can be 5 minutes at interval.The described very first time can be adjusted based on the length in path at interval, and particularly, the length in path is more long, and the very first time is more long at interval, and the length in path is more short, and the very first time is more short at interval.
Described speed computing unit 122 can also based on a plurality of very first times at interval in vehicle the corresponding distance of change in location and with the ratio of corresponding T.T. at interval of described a plurality of very first times, obtain the average speed corresponding with the category of roads of vehicle position, with described average speed as actual vehicle speed.
Described speed computing unit 122 can also obtain the instant speed of a motor vehicle corresponding with the category of roads of vehicle position based on the corresponding distance of change in location and the very first time interval ratio of at interval interior vehicle of each very first time; Again based on a plurality of very first times instant speed of a motor vehicle at interval and with the very first time at interval the ratio of quantity obtain with vehicle in described a plurality of very first times the average speed at interval, with described average speed as actual vehicle speed.
Described average speed can prevent that indivedual very first times vehicle travel situations at interval is special and actual vehicle speed that cause can not reflect the problem of the true travel situations of vehicle.
As shown in Figure 3, amending unit 14 comprises corrected Calculation unit 142, be used for comprehensively estimating the speed of a motor vehicle and actual vehicle speed and obtain to revise the speed of a motor vehicle, because described actual vehicle speed only represents the current road conditions of travelling of vehicle, estimate the speed of a motor vehicle and then represented Vehicle Speed generally, amending unit 14 can carry out comprehensively can reflecting the travel situations of vehicle more realistically based on described actual vehicle speed and the described erection rate of estimating speed of a motor vehicle acquisition to vehicle current driving situation and vehicle travel conditions generally.
Particularly, described corrected Calculation unit 142 obtains to revise the speed of a motor vehicle according to the described mean value of estimating the speed of a motor vehicle and actual vehicle speed.In other embodiments can also be according to estimating the speed of a motor vehicle and the actual vehicle speed various computing correction speed of a motor vehicle of weight separately, the present invention does not limit this.
Described amending unit 14 also comprise link to each other with described corrected Calculation unit 142 enable unit 141, the described unit 141 of enabling is used for triggering described corrected Calculation unit 142 revising the calculating of the speed of a motor vehicle every second time interval, described second interval greater than or equal the described very first time at interval.Particularly, described second time interval is integral multiple at interval of the described very first time.
Particularly, described time calculating unit 13 obtains not the road identical with the category of roads of vehicle current driving in the driving path from described guider 10, and obtain its distance, by the ratio of distance and described erection rate, obtain the very first time of road cost identical with the category of roads of vehicle current driving in the driving path not.
Described time calculating unit 13 also is used for obtaining not the road inequality with the category of roads of vehicle current driving the driving path from described guider 10, and obtain its distance, by the distance ratio of estimating the speed of a motor vehicle corresponding with its category of roads, obtain in the driving path not second time with the road cost inequality of the category of roads of vehicle current driving.
Described time calculating unit 13 by the described very first time and second time with obtain the time that vehicle spends from the current location to the destination.
In other embodiments, described time calculating unit 13 also be used for time of from the current location to the destination, spending according to current time and vehicle and obtain the time that vehicle arrives the destination.For example: the time that spends from the current location to the destination is 2 hours, and the current time is 12 noon, and the information that provides to vehicle user is: the time that vehicle arrives the destination is 2 pm.
With reference to figure 4, show the schematic flow sheet of another embodiment of Vehicular navigation system of the present invention, the difference of present embodiment and embodiment shown in Figure 2 is: described Vehicular navigation system comprises that also the time estimates unit 16, the described time is estimated unit 16, with described guider 10 with estimate unit 11 and link to each other, be used for obtaining the time that each grade road spends according to the distance of each grade road and the ratio of estimating the speed of a motor vehicle of each grade road, also be used for time of spending according to each grade road with obtain the vehicle distance time from origin to destination.
Described Tip element 15 also connects the described time and estimates unit 16, is used for to the described distance time from origin to destination of user prompt.
Can make the user before setting out, just obtain information correlation time by present embodiment, the reference frame of departure time can be provided for the user.
Though the present invention discloses as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art without departing from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (20)
1. an automobile navigation method is characterized in that, comprising:
Carry out path planning, form path from origin to destination, described path comprises the road of at least a grade;
Obtain the estimate speed of a motor vehicle corresponding with the grade of road;
After vehicle sets out, based on the variation of described vehicle location and the time corresponding with described vehicle location variation, obtain the actual vehicle speed corresponding with the category of roads of vehicle position;
Based on the described speed of a motor vehicle, the described actual vehicle speed acquisition correction speed of a motor vehicle corresponding with the category of roads of vehicle position estimated;
Calculate the time that the road of same link grade in the driving path not spends by the described correction speed of a motor vehicle, to obtain the time that vehicle spends from the current location to the destination;
The information of the time correlation that spends from the current location to the destination with described vehicle is provided to vehicle user.
2. automobile navigation method as claimed in claim 1 is characterized in that,
After described vehicle set out, based on the variation of described vehicle location and the time corresponding with described vehicle location variation, the step that obtains the actual vehicle speed corresponding with the category of roads of vehicle position comprised:
After vehicle sets out, every vehicle location of very first time interval acquiring;
Based on each very first time at interval in the corresponding distance of change in location and the very first time ratio at interval of vehicle, obtain the instant speed of a motor vehicle corresponding with the category of roads of vehicle position, with the described instant speed of a motor vehicle as actual vehicle speed.
3. automobile navigation method as claimed in claim 1 is characterized in that,
After described vehicle set out, based on the variation of described vehicle location and the time corresponding with described vehicle location variation, the step that obtains the actual vehicle speed corresponding with the category of roads of vehicle position comprised:
After vehicle sets out, every vehicle location of very first time interval acquiring;
Based on a plurality of very first times at interval in vehicle the corresponding distance of change in location and with the ratio of corresponding T.T. at interval of described a plurality of very first times, obtain the average speed corresponding with the category of roads of vehicle position, with described average speed as actual vehicle speed.
4. automobile navigation method as claimed in claim 1 is characterized in that,
After described vehicle set out, based on the variation of described vehicle location and the time corresponding with described vehicle location variation, the step that obtains the actual vehicle speed corresponding with the category of roads of vehicle position comprised:
After vehicle sets out, every vehicle location of very first time interval acquiring;
The corresponding distance of change in location and very first time ratio at interval based at interval interior vehicle of each very first time obtain the instant speed of a motor vehicle corresponding with the category of roads of vehicle position;
Based on a plurality of very first times instant speed of a motor vehicle at interval and with the very first time at interval the ratio of quantity obtain with vehicle in described a plurality of very first times the average speed at interval, with described average speed as actual vehicle speed.
5. automobile navigation method as claimed in claim 1 is characterized in that,
Describedly estimate the step that the speed of a motor vehicle, described actual vehicle speed obtain the correction speed of a motor vehicle corresponding with the category of roads of vehicle position and comprise based on described:
Obtain to revise the speed of a motor vehicle according to the mean value of estimating the speed of a motor vehicle and actual vehicle speed.
6. as claim 2,3 or 4 described automobile navigation methods, it is characterized in that,
Describedly estimate the step that the speed of a motor vehicle, described actual vehicle speed obtain the correction speed of a motor vehicle corresponding with the category of roads of vehicle position and comprise based on described:
Every second time interval, obtain the correction speed of a motor vehicle corresponding with the category of roads of vehicle position based on the described speed of a motor vehicle, described actual vehicle speed estimated, described second interval greater than or equal described very first time interval.
7. automobile navigation method as claimed in claim 6 is characterized in that, described second time interval is integral multiple at interval of the described very first time.
8. automobile navigation method as claimed in claim 1 is characterized in that,
Obtain corresponding with the grade of road estimate the speed of a motor vehicle after, vehicle sets out and also comprises before:
Obtain the time that each grade road spends according to the distance of each grade road and the ratio of estimating the speed of a motor vehicle of each grade road;
The time that spends according to each grade road with obtain the vehicle distance time from origin to destination;
Provide the described distance time to vehicle user.
9. automobile navigation method as claimed in claim 1 is characterized in that,
Describedly provide the step of the information of the time correlation that from the current location to the destination, spends with described vehicle to comprise to vehicle user:
To the time that vehicle user provides vehicle to spend from the current location to the destination.
10. automobile navigation method as claimed in claim 1 is characterized in that,
Describedly provide the step of the information of the time correlation that from the current location to the destination, spends with described vehicle to comprise to vehicle user:
The time that from the current location to the destination, spends based on current time and vehicle and obtain the time that vehicle arrives the destination;
Provide described vehicle to arrive the time of destination to vehicle user.
11. a Vehicular navigation system is characterized in that, comprising:
Guider is used for carrying out path planning, forms path from origin to destination, and described path comprises the road of at least a grade;
Estimate the unit, link to each other with described guider, be used for obtaining the estimate speed of a motor vehicle corresponding with the grade of road;
The unit tests the speed, link to each other with described guider, be used for obtaining vehicle location from described guider, also be used for changing the corresponding time based on the variation of described vehicle location with described vehicle location, obtain the actual vehicle speed corresponding with the category of roads of vehicle position;
Amending unit links to each other with the described unit of estimating with the described unit that tests the speed, and is used for based on the described speed of a motor vehicle, the described actual vehicle speed acquisition correction speed of a motor vehicle corresponding with the category of roads of vehicle position estimated;
Time calculating unit links to each other with described amending unit with described guider, is used for calculating the time that the road of driving path same link grade not spends by the described correction speed of a motor vehicle, to obtain the time that vehicle spends from the current location to the destination;
Tip element links to each other with described time calculating unit, is used for providing to vehicle user the information of the time correlation that spends from the current location to the destination with described vehicle.
12. Vehicular navigation system as claimed in claim 11 is characterized in that,
The described unit that tests the speed comprises collecting unit and speed computing unit, wherein,
Described collecting unit links to each other with described guider, be used for after described vehicle sets out, every the very first time at interval from described guider every obtaining vehicle location one time;
The speed computing unit, link to each other with described collecting unit, be used for the corresponding distance of change in location and very first time ratio at interval based at interval interior vehicle of each very first time, obtain the instant speed of a motor vehicle corresponding with the category of roads of vehicle position, the described instant speed of a motor vehicle is actual vehicle speed.
13. Vehicular navigation system as claimed in claim 11 is characterized in that,
The described unit that tests the speed comprises collecting unit and speed computing unit, wherein,
Described collecting unit links to each other with described guider, be used for after described vehicle sets out, every between the very first time from described guider every obtaining vehicle location one time;
Described speed computing unit, link to each other with described collecting unit, be used for based on a plurality of very first times at interval in vehicle the corresponding distance of change in location and with the ratio of corresponding T.T. at interval of described a plurality of very first times, obtain the average speed corresponding with the category of roads of vehicle position, with described average speed as actual vehicle speed.
14. Vehicular navigation system as claimed in claim 11 is characterized in that,
The described unit that tests the speed comprises collecting unit and speed computing unit, wherein,
Described collecting unit links to each other with described guider, be used for after described vehicle sets out, every between the very first time from described guider every obtaining vehicle location one time;
Described speed computing unit links to each other with described collecting unit, is used for the corresponding distance of change in location and very first time interval ratio based at interval interior vehicle of each very first time, obtains the instant speed of a motor vehicle corresponding with the category of roads of vehicle position; Also be used for based on the instant speed of a motor vehicle at interval of a plurality of very first times and with the very first time at interval the ratio of quantity obtain with vehicle in described a plurality of very first times the average speed at interval, with described average speed as actual vehicle speed.
15. Vehicular navigation system as claimed in claim 11 is characterized in that,
Described amending unit is used for obtaining to revise the speed of a motor vehicle according to the described mean value of estimating the speed of a motor vehicle and actual vehicle speed.
16. as claim 12,13 or 14 described Vehicular navigation systems, it is characterized in that, described amending unit also comprises the unit that enables that links to each other with described corrected Calculation unit, the described unit that enables is used for triggering described corrected Calculation unit revising the calculating of the speed of a motor vehicle every second time interval, described second interval greater than or equal the described very first time at interval.
17. Vehicular navigation system as claimed in claim 16 is characterized in that, described second time interval is integral multiple at interval of the described very first time.
18. Vehicular navigation system as claimed in claim 16 is characterized in that,
Described Vehicular navigation system comprises that also the time estimates the unit, wherein,
Time is estimated the unit, with described guider with estimate the unit and link to each other, be used for obtaining the time that each grade road spends according to the distance of each grade road and the ratio of estimating the speed of a motor vehicle of each grade road, also be used for time of spending according to each grade road with obtain the vehicle distance time from origin to destination;
Tip element is estimated the unit with the described time and is linked to each other, and also is used for providing the described distance time to vehicle user.
19. Vehicular navigation system as claimed in claim 11 is characterized in that, described Tip element is used for the time that spends to the vehicle that vehicle user provides time calculating unit to obtain from the current location to the destination.
20. Vehicular navigation system as claimed in claim 11 is characterized in that,
Described time calculating unit also is used for time of spending according to current time and vehicle from the current location to the destination and obtain the time that vehicle arrives the destination;
Described Tip element is used for providing described vehicle to arrive the time of destination to vehicle user.
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