CN102592446B - Method for computing intercity road travel time by using floating car locating data - Google Patents
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- 238000005188 flotation Methods 0.000 claims description 18
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- 238000013480 data collection Methods 0.000 claims description 4
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Abstract
The invention discloses a method for computing intercity road travel time by using floating car locating data, which relates to the application field of road traffic incident information and is invented for computing intercity road travel time. The method comprises the steps of setting at least two speed threshold values which divide intercity road links into at least three types of road sections; collecting locating data of the floating car at each data collecting moment, and the locating data package comprises running speeds and longitude and latitude coordinates; dividing the intercity road links into sections according to the locating data of the floating car and the speed threshold values; and computing the travel time on each type of the road sections according to the locating data of the floating car and the speed threshold values. The method is mainly applied to collecting and releasing road information.
Description
Technical field
The present invention relates to the application of road traffic accident information, relate in particular to a kind of method of utilizing Floating Car locator data to calculate the intercity road travel time.
Background technology
The locator data of Floating Car is intelligent transportation system (Intelligent Transportation System, ITS) one of important sources of data, the locator data of utilizing Floating Car to gather, calculate the hourage of road, for traveler, traffic administration personnel inquire about and various decision-making.Road travel temporal information can be advanced Traveler Information system (Advanced Technical InformationIntelligent System accurately in real time, ATIS) and advanced traffic control system (Advanced Transportation Management System, ATMS) realizing route induction provides effective information, thereby reduces traffic congestion.
The technology of existing calculating hourage, is to gather GPS (Global Positioning System, GPS) data from taxi or bus, and usings these data and calculate the hourage of road chain as locator data.
State in realization in the process of calculating hourage, inventor finds that prior art carries out the calculating of hourage mainly for Zhong road, city chain, and the scheme of not carrying out calculating hourage for intercity Jian road chain cannot provide for traveler the trip information of intercity road.
Summary of the invention
Embodiments of the invention provide a kind of method of utilizing Floating Car locator data to calculate the intercity road travel time, and the trip information of intercity road can be provided for traveler.
The invention provides a kind of method of utilizing Floating Car locator data to calculate the method for intercity road travel time, comprising:
At least two threshold speeds are set, and described at least two threshold speeds are divided at least three kinds of road segment classification by intercity road chain;
In each data acquisition, constantly gather the locator data of described Floating Car, described locator data comprises road speed and latitude and longitude coordinates;
According to the locator data of described Floating Car and described threshold speed, described intercity road chain is carried out to segmentation;
According to the locator data of described Floating Car and described threshold speed, calculate the hourage on every kind of section.
The Floating Car locator data of utilizing that the embodiment of the present invention provides is calculated the method for intercity road travel time, the locator data that can provide according to Floating Car and threshold speed carry out segmentation by intercity road chain, and the locator data providing according to Floating Car and threshold speed calculate the hourage on each section.Filled up in prior art and for intercity road chain, do not carried out the blank of segmentation and section calculating hourage, for traveler provides careful trip information more comprehensively.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 utilizes Floating Car locator data to calculate the process flow diagram of the method for intercity road travel time in the embodiment of the present invention;
Fig. 2 utilizes Floating Car locator data to calculate the process flow diagram of the method for intercity road travel time in another embodiment of the present invention;
Fig. 3 calculates the schematic diagram of road section length in application scenarios of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of method of utilizing Floating Car locator data to calculate the intercity road travel time, and as shown in Figure 1, described method comprises the steps:
101, at least two threshold speeds are set.
Described at least two threshold speeds are divided at least three kinds of road segment classification by intercity road chain.The embodiment of the present invention does not limit the number of described threshold speed and size.
102, in each data acquisition, constantly gather the locator data of Floating Car.
The described locator data that constantly gathers Floating Car in each data acquisition comprises by data source provider and periodically gathers the gps data that Floating Car is uploaded, according to pre-determined host-host protocol, receive the gps data that data source provider sends, in described locator data, at least comprise road speed and the latitude and longitude coordinates of Floating Car.The cycle length of the content of locator data and data acquisition can need to arrange according to actual operation, and the embodiment of the present invention does not limit this.
103, according to the locator data of Floating Car and threshold speed, intercity road chain is carried out to segmentation.
It is example that gentle logical two threshold speeds of threshold value of slow threshold value are gathered around in the setting of take, gathering around slow threshold value is 40 kilometers/hour, 80 kilometers/hour of slow logical threshold values, gather around the gentle logical threshold value of slow threshold value intercity road chain is divided into three kinds of sections, Floating Car reaches 40 kilometers/hour of formed sections of the displacement of advancing by starting (speed is zero) to road speed, Floating Car road speed surpasses 40 kilometers/hour and reaches 80 kilometers/hour of formed sections of the displacement of advancing and Floating Car road speed drops to 80 kilometers/hour of formed sections of the displacement of advancing over 80 kilometers/hour again to road speed to road speed.For example, can obtain latitude and longitude coordinates, Floating Car road speed in locator data that Floating Car Startup time reports reaches 40 kilometers/hour and reports latitude and longitude coordinates, Floating Car road speed in locator data to reach 80 kilometers/hour to report latitude and longitude coordinates and Floating Car road speed in locator data again to drop to 80 kilometers/hour of latitude and longitude coordinates that report in locator data.By two latitude and longitude coordinates obtaining can calculate Floating Car by starting (speed is zero) to road speed reach 40 kilometers/hour of formed road section length of the displacement of advancing, Floating Car by vehicle speed reach 40 kilometers/hour to road speed reach 80 kilometers/hour of formed road section length of the displacement of advancing, Floating Car reaches 80 kilometers/hour by vehicle speed and again drops to 80 kilometers/hour of formed road section length of the displacement of advancing to road speed.
It should be noted that, described road section length is not to divide according to the length of intercity road chain, and whether but reached by Floating Car, threshold speed determines.Because the driver's of every table flotation motor-car driving habits and the road conditions faced can be not in full accord, so every table flotation motor-car by start to road speed reach the displacement that threshold speed advances can be strictly not identical, be that the road section length that every table flotation Motor Car Institute calculates can be strictly not identical, this has also reflected the driving situation on section more comprehensively really.
104, according to the locator data of Floating Car and threshold speed, calculate the hourage on every kind of section.
Calculate Floating Car in each section up train time, described running time can obtain according to the mistiming that periodically receives locator data.For example, take and when Floating Car road speed reaches 40 kilometers/hour, report moment of locator data to deduct the running time that moment that Floating Car road speed reports locator data as zero time is this section.
The Floating Car locator data of utilizing that the embodiment of the present invention provides is calculated the method for intercity road travel time, the locator data that can provide according to Floating Car and threshold speed carry out segmentation by intercity road chain, and the locator data providing according to Floating Car and threshold speed calculate the hourage on each section.Filled up in prior art and for intercity road chain, do not carried out the blank of segmentation and section calculating hourage, for traveler provides careful trip information more comprehensively.
Further, the embodiment of the present invention also provides a kind of method of utilizing Floating Car locator data to calculate the intercity road travel time, and described method is the expansion to method shown in Fig. 1, and as shown in Figure 2, described method comprises the steps:
201, two threshold speeds are set.
Described two threshold speeds are divided into three kinds of road segment classification by intercity road chain.An application scenarios of the embodiment of the present invention is: arrange and gather around gentle logical two threshold speeds of threshold value of slow threshold value, it is described that to gather around slow threshold value be 40 kilometers/hour, described slow logical threshold value is 80 kilometers/hour, and described two threshold speeds are divided into the section that blocks up, jogging section and three kinds, unimpeded section road segment classification by intercity road chain.
It should be noted that, described two threshold speeds are divided into three kinds of road segment classification by intercity road chain and do not represent that described intercity road chain is only comprised of these three sections.Due to during real road travels, Floating Car speed has to increase to have and subtracts, and likely Floating Car reaches speed after the speed in unobstructed section and drops to again even the block up speed in section of slow forehearth section, then rises to again the speed in slow forehearth section or unimpeded section.The meeting of variation repeatedly of speed is divided into intercity road chain more than three sections, and the type in these sections can not exceed the section that blocks up, jogging section and these three kinds of road segment classification of unimpeded section.
202, periodically gather the locator data of Floating Car.
The locator data that described periodicity gathers Floating Car comprises by data source provider and periodically gathers the gps data that Floating Car is uploaded, according to pre-determined host-host protocol, receive the gps data that data source provider sends, in described locator data, at least comprise the road speed of Floating Car.The cycle length of the content of locator data and data acquisition can need to arrange according to actual operation, and the embodiment of the present invention does not limit this.
203, locator data is mated with intercity road chain.
Because intercity road mostly is highway, equidirectional road chain negligible amounts and road chain are longer, so the matching algorithm of prior art can match the positional information of Floating Car on correct intercity road chain more exactly, repeat no more herein.
204, according to locator data and threshold speed, determine the road section length in each section.
To set, gather around gentle logical two threshold speeds of threshold value of slow threshold value, and described in to gather around slow threshold value be that to be 80 kilometers/hour be example to 40 kilometers/hour of described slow logical threshold values: gather around the gentle logical threshold value of slow threshold value intercity road chain be divided into at least three sections, Floating Car is by start (speed is zero) the formed section that blocks up of displacement of advancing when road speed reaches 40 kilometers/hour, Floating Car road speed reaches 40 kilometers/hour of formed slow forehearth sections of displacement of advancing when road speed reaches 80 kilometers/hour, the formed unimpeded section of displacement of advancing when Floating Car road speed drops to 80 kilometers/hour once again after Floating Car road speed reaches 80 kilometers/hour.Take to calculate and block up road section length as example, positional information and the Floating Car road speed that can obtain in locator data that Floating Car Startup time reports reach 40 kilometers/hour of positional informations that report in locator data, by two positional informations obtaining, can calculate Floating Car by the road section length that starts (speed the is zero) section that displacement forms of advancing when road speed reaches 40 kilometers/hour.Described positional information includes but are not limited to latitude and longitude coordinates locating information, and the embodiment of the present invention does not limit this.
It should be noted that, due to during real road travels, Floating Car speed increases and decreases repeatedly, so described slow forehearth section also comprises Floating Car road speed and reach 80 kilometers/hour of formed sections of displacement of advancing when road speed drops to 40 kilometers/hour, described in the section that blocks up also comprise the formed section of displacement of advancing after Floating Car road speed reaches 40 kilometers/hour when road speed drops to zero.
Because intercity road chain is long and branch road is less, the section of dividing with threshold speed is in addition very short for the chain of the intercity road of whole piece, so the approximate lineal measure that represents section of air line distance that can be calculated by the positional information reporting for twice.
Should be noted that in addition, described road section length is not to divide according to the length of intercity road chain, and whether but reached by Floating Car, threshold speed determines.Take to calculate and block up road section length as example, because the driver's of every table flotation motor-car driving habits and the road conditions faced can be not in full accord, so every table flotation motor-car is by starting to road speed, to reach 40 kilometers/hour of displacements of advancing strictly not identical, and the road section length that every table flotation Motor Car Institute calculates can be strictly not identical.Can calculate a plurality of road section length of blocking up according to the locator data of many table flotations motor-car, then a plurality of road section length data of blocking up be added up, to obtain blocking up really road section length more comprehensively.In addition, can also adopt the mode that abandons extremely block up individually road section length data or enlarged sample space to guarantee that the road section length of blocking up counting is truly comprehensive, this embodiment of the present invention is not limited.
Further it should be noted that, the locator data of Floating Car gathered according to the cycle, in practical application, there will be data acquisition velocity amplitude constantly strictly not equal the situation of threshold speed, for example, collection period is 60 seconds, the Floating Car speed that 10:00 gathers certain table flotation motor-car in the morning is 35 kilometers/hour, now for Floating Car speed reaches, does not gather around slow threshold value, so the calculating of the road section length of not blocking up.At next collection period, be that the speed that the morning, 10:01 gathered this Floating Car is 42 kilometers/hour, this speed reaches gathers around slow threshold value, needs to calculate the road section length of blocking up.In addition, can guarantee that data acquisition velocity amplitude constantly equals the probability of the situation generation of threshold speed by shortening the mode in collection period or enlarged sample space as far as possible.This embodiment of the present invention is not limited.
205, add up the hourage on each section.
Calculate Floating Car in each section up train time, described running time can obtain according to the mistiming that periodically receives locator data.For example, take and when Floating Car road speed reaches 40 kilometers/hour, report moment of locator data to deduct the running time that moment that Floating Car road speed reports locator data as zero time is this section.
As described in step 204, because the road section length calculating according to every table flotation Motor Car Institute can be strictly not identical, so the running time of every table flotation motor-car on same section can be strictly not identical yet, this just need to carry out class statistic to the travelling data of many table flotations motor-car, to obtain objective comprehensive hourage on this section.The mode that can take steps equally the enlarged sample space described in 204 or abandon indivedual Outliers when carrying out class statistic guarantees data hourage objective comprehensively.
206, shown the hourage on each section respectively in the road section length in each section.
Optionally, the intercity road chain described in the embodiment of the present invention is not for belonging to intercity road of arbitrary city-level administrative division.Owing to can calculating city road chain hourage in prior art, so the embodiment of the present invention has made up, calculate the intercity road chain blank of hourage, and road chain in intercity road chain and administrative division is distinguished to the double counting that can also avoid hourage on the chain of same road.
Preferably, the Floating Car described in the embodiment of the present invention preferably adopts intercity the logistic car travelling.Because logistic car is higher and stable intercity frequency of travelling, so preferably gather locator data from logistic car, can provide abundant and stable Data Source hourage for calculating intercity road chain.
In the Another application scene of the embodiment of the present invention, can be using the latitude and longitude coordinates point of the reference position of described intercity road chain and final position respectively as the starting point and ending point of described intercity road chain.Or the latitude and longitude coordinates point gathering for the first time after Floating Car enters intercity road chain is as starting point, before Floating Car is rolled described intercity road chain away from, the last latitude and longitude coordinates point gathering is as terminating point.When calculating certain road section length, Floating Car distance between every adjacent two latitude and longitude coordinates points on this section can be added up, draw thus the road section length in this section.Concrete Floating Car has surpassed and has gathered around slow threshold value in N secondary data collection road speed constantly as shown in Figure 3, enters jogging section; In N+5 secondary data collection road speed constantly, surpass slow logical threshold value, entered unimpeded section.When calculating jogging road section length, using the difference of the distance of the latitude and longitude coordinates point of N and twice acquisition of N+1 as sub-road section length 1, using the difference of the distance of the latitude and longitude coordinates point of N+1 and twice acquisition of N+2 as sub-road section length 2, by that analogy, calculate 5 sub-road section length.Then these 5 sub-road section length values are cumulative, draw the length in jogging section.Because intercity road chain is not strict linear, so calculate the length that the implementation of road section length can accurately calculate non-linear section more in this application scene.Can infer, the shortening position data collecting cycle can increase latitude and longitude coordinates point, the length in the non-linear section of the more calculating of latitude and longitude coordinates point is just more accurate, if continuous acquisition latitude and longitude coordinates point under extreme conditions, all latitude and longitude coordinates are named a person for a particular job and are formed a smooth curve, and this curve is road section length.
Further, in the Another application scene of the embodiment of the present invention, according to the locator data counting statistics road section length of many table flotations motor-car and statistics during hourage, can adopt the mode of class statistic, the concrete latitude and longitude coordinates point by the section division points of many table flotations motor-car carries out class statistic, draws the latitude and longitude coordinates of statistics section division points.The difference of the latitude and longitude coordinates point of every adjacent two statistics section division points be the length in the section of these two the latitude and longitude coordinates point formation of adding up section division points.Then by many table flotations motor-car, carry out class statistic the hourage on same section, draws the statistics hourage in this section.In addition, when counting statistics road section length, every sub-road section length of many table flotations motor-car can also be carried out respectively to class statistic, then that the word road section length after class statistic is cumulative, draw the road section length after statistics.
When class statistic, the Outliers of sample space can be rejected.The implementation of concrete judgement extremum can be to set in advance extremum threshold value by keeper, and all sample datas that are greater than this extremum threshold value are all regarded as extremum and eliminate sample space.
Utilizing of having adopted the at present gps data that taxi or bus upload is as the method in locator data source, be subject to the restriction of Floating Car range of operation more, generally, taxi and bus can cover metropolitan district Nei road chain preferably, but the operation of carrying out intercity is less, and operation frequency is unstable.The Floating Car locator data of utilizing that the embodiment of the present invention provides is calculated the method for intercity road travel time, the locator data that can provide according to Floating Car is by relatively long intercity road chain segmentation, the running time on each section respectively of many table flotations motor-car is added up, drawn the hourage on each section.Filled up the blank of not carrying out calculating hourage for intercity road chain in prior art, for traveler provides more comprehensively trip information.
In addition, the Floating Car locator data of utilizing that the embodiment of the present invention provides is calculated the method for intercity road travel time, relatively long intercity road chain can also be carried out to segmentation, and segmentation hourage of intercity road chain is represented, for traveler provides refinement trip information service more.
Finally, the Floating Car locator data of utilizing that the embodiment of the present invention provides is calculated the method for intercity road travel time, for the feature of intercity road chain with intercity logistic car the collection source as locator data, for the calculating of intercity road chain hourage provides more stable data basis, guaranteed intercity hourage accurately.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential common hardware by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better embodiment.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium can read, as the floppy disk of computing machine, hard disk or CD etc., comprise some instructions with so that computer equipment (can be personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by the described protection domain with claim.
Claims (8)
1. utilize Floating Car locator data to calculate the method for intercity road travel time, it is characterized in that, comprising:
At least two threshold speeds are set, and described at least two threshold speeds are divided at least three kinds of road segment classification by intercity road chain;
In each data acquisition, constantly gather the locator data of described Floating Car, described locator data comprises road speed and latitude and longitude coordinates;
According to the locator data of described Floating Car and described threshold speed, described intercity road chain is carried out to segmentation;
According to the locator data of described Floating Car and described threshold speed, calculate the hourage on every kind of section;
Describedly according to the locator data of described Floating Car and described threshold speed, described intercity road chain is carried out to segmentation, comprising:
Road speed and threshold speed that described Floating Car is engraved when each data acquisition compare, when the road speed engraving when a certain data acquisition surpasses described threshold speed first, the latitude and longitude coordinates point engraving during using data acquisition corresponding to this road speed is as section division points, and at least two section division points that relatively draw with at least two threshold speeds are at least divided into three kinds of sections by described intercity road chain;
The distance of adjacent latitude and longitude coordinates point between two between two section division points is cumulative, draw the road section length in section.
2. method according to claim 1, is characterized in that, at least two threshold speeds of described setting, comprising:
The gentle logical threshold value of slow threshold value is gathered around in setting, described in gather around slow threshold value and be less than described slow logical threshold value, described in gather around slow threshold value and described slow logical threshold value described intercity road chain is divided into block up, jogging and unimpeded three kinds of road segment classification.
3. method according to claim 2, is characterized in that, described method also comprises:
Described locator data is mated with described intercity road chain.
4. method according to claim 3, is characterized in that, the described locator data that constantly gathers described Floating Car in each data acquisition, comprising:
According to default data collection cycle, gather the locator data of described Floating Car, described data acquisition is expiring constantly for data collection cycle constantly.
5. method according to claim 4, is characterized in that, using the reference position of described intercity road chain as starting point, to calculate road section length with described section division points;
Using end stopping of chain position, described intercity road as terminating point, to calculate road section length with described section division points; Or,
The latitude and longitude coordinates gathering for the first time after described Floating Car enters described intercity road chain is as starting point, to calculate road section length with described section division points;
Described Floating Car is gone out from the last latitude and longitude coordinates gathering before the chain of described intercity road as terminating point, to calculate road section length with described section division points.
6. method according to claim 5, is characterized in that, described according to the hourage on the locator data of described Floating Car and every kind of section of described threshold speed calculating, comprising:
The hourage of the data acquisition of two corresponding section division points difference constantly on this section using each section.
7. method according to claim 4, is characterized in that, described road speed and the threshold speed that described Floating Car is engraved when each data acquisition compares, and comprising:
At least two of at least two table flotation motor-cars section division points corresponding to same threshold speed are carried out to class statistic, draw the statistics section division points corresponding to this threshold speed;
Described that the distance of adjacent latitude and longitude coordinates point between two between two section division points is cumulative, draw the road section length in section, comprising:
Road section length using the distance of the latitude and longitude coordinates point of every two adjacent statistics section division points as every kind of section;
Described according to the hourage on the locator data of described Floating Car and every kind of section of described threshold speed calculating, comprising:
At least two table flotation motor-cars are carried out to class statistic the hourage on same section, draw the statistics hourage in this section.
8. according to the method described in any one in claim 1 to 7, it is characterized in that, described Floating Car comprises the logistic car travelling on the chain of intercity road.
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| JP5655831B2 (en) * | 2012-09-13 | 2015-01-21 | トヨタ自動車株式会社 | Driving environment estimation apparatus and method |
| CN102881060B (en) * | 2012-10-17 | 2015-03-11 | 潍柴动力股份有限公司 | Method and system for acquiring vehicle typical working condition |
| CN104637313B (en) * | 2013-11-11 | 2016-09-21 | 阿里巴巴集团控股有限公司 | Road travel method for determining speed and device |
| CN104680785B (en) * | 2013-11-28 | 2017-02-22 | ***通信集团公司 | Method and device for determining traffic condition of road section |
| CN104952243B (en) * | 2014-03-25 | 2019-05-07 | 高德软件有限公司 | Current duration distribution method and device |
| CN105117595B (en) * | 2015-08-19 | 2018-04-10 | 大连理工大学 | A kind of private car trip data integrated approach based on floating car data |
| CN107578624A (en) * | 2017-09-15 | 2018-01-12 | 杭州分数科技有限公司 | Urban transportation management-control method, apparatus and system |
| CN113947903B (en) * | 2021-10-18 | 2022-09-09 | 沈阳世纪高通科技有限公司 | Method for calculating free flow and road congestion and buffer interval based on floating car data |
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| CN101270997B (en) * | 2007-03-21 | 2010-07-28 | 北京交通发展研究中心 | Floating car dynamic real-time traffic information processing method based on GPS data |
| US8340718B2 (en) * | 2007-12-20 | 2012-12-25 | Telecom Italia S.P.A. | Method and system for estimating road traffic |
| CN101604478B (en) * | 2009-06-18 | 2011-05-04 | 北京九州联宇信息技术有限公司 | Method and system for processing dynamic traffic information |
| CN101673466A (en) * | 2009-09-25 | 2010-03-17 | 北京航空航天大学 | Information processing method of float car under control of traffic signals |
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