CN101673460A - Traffic information quality evaluation method, device and system therefor - Google Patents
Traffic information quality evaluation method, device and system therefor Download PDFInfo
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- CN101673460A CN101673460A CN200910091796A CN200910091796A CN101673460A CN 101673460 A CN101673460 A CN 101673460A CN 200910091796 A CN200910091796 A CN 200910091796A CN 200910091796 A CN200910091796 A CN 200910091796A CN 101673460 A CN101673460 A CN 101673460A
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Abstract
The embodiment of the invention discloses a traffic information quality evaluation method, a device and a system therefor, and relates to the communication field. In order to ensure the user to obtaina traffic information service with reliable quality, the technical scheme comprises the steps: acquiring road unit data of a specified area; acquiring track point data measured by a vehicle positioning device within the specified period of time; acquiring evaluation criterion data according to the acquired road unit data and the track point data; and evaluating the quality of the traffic information data provided by a traffic information service system according to the evaluation criterion data. The invention is applicable to process the traffic information.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of quality evaluating method, Apparatus and system of transport information.
Background technology
By obtaining the method for Real-time Traffic Information, estimation OD required time is induced the public path of going on a journey, and makes full use of the time null resource of traffic system, and the utilization rate of disperseing major trunk roads in the road network is one of transport solution main method of blocking up.ATIS (Advanced Traffic Information System, advanced transportation information service systems) be to apply in whole traffic administration and the service technological means such as magnanimity information processing, data communication, electronic sensor and Electronic Control are integrated, provide a kind of on a large scale in, comprehensive playing a role, in real time, comprehensive traffic information service accurately and efficiently.
In actual conditions, ATIS tends to real-time Traffic Information (comprising the running speed of road, the OD running time of road and the congestion status on the road etc.) is provided to the user by various information published methods (comprising internet, WAP, note, automatic navigator etc.), is presented in the traffic congestion state that is whole city's road network in user's eye.The user selects line mode and trip route according to current traffic behavior, avoids the traffic congestion location.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: can't realize accurate and effective transport information quality evaluating method at present, the quality of coming transportation information service systems is released news detects, the error that the order of accuarcy of evaluating system traffic information, quantization system produce can obtain the traffic-information service of reliable quality to ensure the user.
Summary of the invention
Embodiments of the invention provide a kind of quality evaluating method, Apparatus and system of transport information, can ensure that the user can obtain the traffic-information service of reliable quality.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of quality evaluating method of transport information comprises:
Obtain the roadway element data of appointed area;
Obtain the tracing point data of vehicle positioning device measuring in the fixed time section;
According to roadway element data of obtaining and the tracing point data of obtaining, obtain the evaluation criterion data;
According to described evaluation criterion data, the traffic information data that is provided by transportation information service systems is carried out quality assessment.
A kind of quality assessment device of transport information comprises:
The road data acquiring unit is used to obtain the roadway element data of appointed area;
The track data acquiring unit is used to obtain the tracing point data of vehicle positioning device measuring in the fixed time section;
The normal data acquiring unit is used for the tracing point data that the roadway element data obtained according to described road data acquiring unit and described track data acquiring unit obtain, and obtains the evaluation criterion data;
The quality assessment unit is used for the evaluation criterion data obtained according to described normal data acquiring unit, and the traffic information data that is provided by transportation information service systems is carried out quality assessment.
A kind of QA system of transport information comprises the quality assessment device of vehicle positioning equipment and vehicular communication equipment and transportation information service systems and transport information;
Wherein, described vehicle positioning equipment is used to measure the tracing point data of drive test car, and sends described tracing point data to described vehicular communication equipment;
Described vehicular communication equipment, be used to receive described tracing point data after, send described tracing point data to the quality assessment device of described transport information;
Described transportation information service systems is used for sending traffic information data to the quality assessment device of described transport information;
The quality assessment device of described transport information is used to obtain the roadway element data of appointed area; Obtain the tracing point data of vehicle positioning device measuring in the fixed time section; According to roadway element data of obtaining and the tracing point data of obtaining, obtain the evaluation criterion data; And, the traffic information data that is provided by transportation information service systems is carried out quality assessment according to described evaluation criterion data.
The quality evaluating method of the transport information that the embodiment of the invention provides, Apparatus and system, obtain the evaluation criterion data according to the roadway element data of appointed area and the tracing point data in the fixed time section, and the traffic information data that is provided by transportation information service systems is carried out quality assessment according to described evaluation criterion data.Therefore, with the traffic information of real road accurately that obtains as evaluation criterion, the traffic information data that need issue transportation information service systems carries out quality testing accurately and efficiently, issue this transport information to the user again after reaching higher level detecting information quality, thereby the guarantee user can access the traffic-information service of reliable quality.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done an introduction simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The schematic flow sheet of the quality evaluating method of a kind of transport information that Fig. 1 provides for the embodiment of the invention;
Fig. 2 is the road net data structural representation of the embodiment of the invention;
The system architecture diagram of a kind of transport information quality evaluation that Fig. 3 provides for the embodiment of the invention;
A kind of method flow synoptic diagram that quality assessment according to the evaluation criterion data traffic information data that is provided by transportation information service systems is provided that Fig. 4 provides for the embodiment of the invention;
The formation synoptic diagram of the quality assessment device of a kind of transport information that Fig. 5 provides for the embodiment of the invention;
The formation synoptic diagram of the QA system of a kind of transport information that Fig. 6 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
In order to ensure that the user can obtain the traffic-information service of reliable quality, the embodiment of the invention provides a kind of quality evaluating method of transport information, and as shown in Figure 1, its step comprises:
101, central terminal server is obtained the roadway element data of appointed area;
In the present embodiment, need obtain the road geographic information data in test area (as certain city, certain district etc.), these road geographic information data comprise path space data and road attribute data.For example, read the coordinate points data and the road attribute data of the electronic chart of vector coding mode.
And, also need to set up the road net data structure, and the road net data structure is path space data and the Storage Format of road attribute data in computing machine that it is the basic data that path culculating calculates.Foundation to the road net data structure describes below, and it comprises the foundation of node and roadway element.
A. the foundation of node
In the road network digital map database of general vector coding mode, road is stored in the mode of line or broken line object, is expressed as the ordered set of a series of coordinate points.By connecting these coordinate points, the road network in city just can form, and these coordinate points are defined as node, and node is divided into two kinds: the node that meets following feature is called connective node, 1) road usual friendship crossing, 2) the road starting point, 3) the road terminal point; The node that does not meet connective node diagnostic is called ordinary node.
The data member that each node object comprises is as follows:
Node ID: the sequence number of each node in the road network identifies a unique node.
Node longitude: the longitude of node.
Node latitude: the latitude value of node.
So, can be after reading the road geographic information data, according to the feature of node in the feature of the ordinary node of above-mentioned definition and connective node and this road geographic information data, determine ordinary node and connective node in these road geographic information data.Then, read the data message (node ID, node longitude, node latitude) of these ordinary nodes and connective node.
B. the foundation of roadway element
If have road between the connective node of two direct neighbors, this part road is as a roadway element so.Roadway element is represented directive road, in some electronic charts, the single road line represented can two way road, such road should be divided into the opposite unit, two road of direction according to the difference of direction.
So, can be at the road geographic information data that read, after having obtained the data message of corresponding ordinary node and connective node,, obtain testing the roadway element data in area according to definition and the ordinary node of acquisition and the data message of connective node of above-mentioned roadway element.For example, as shown in Figure 2, be expressed as the road net data structural representation of the embodiment of the invention.
If the traffic information data of testing all regional roads is carried out quality testing, then workload is undoubtedly hugely, therefore, can select the some areas in test area, only the traffic information data to these some areas carries out quality testing, and testing result is regional as whole test.Therefore, in step 101, can from the roadway element data of testing the area, only obtain the roadway element data of appointed area.And the roadway element quantity of this appointed area is generally the 5%-10% of the roadway element quantity in whole test area.
102, central terminal server is obtained the tracing point data of vehicle positioning device measuring in the fixed time section;
At this, to the notion that needs in embodiments of the present invention the to use explanation that makes an explanation, wherein, " drive test car " be meant and be mounted with positioning equipment and communication facilities, and gather in the process of moving and the vehicle of registration of vehicle driving trace." vehicle positioning equipment " is meant the positioning equipment of installing on the drive test car, as GPS (NavigationSatellite Time and Ranging/Global Positioning System, range-finding navigation/GPS when satellite is surveyed) equipment." vehicular communication equipment " is meant the Wireless Telecom Equipment of installing on the drive test car.
Carry out in the process of quality assessment at traffic information data transportation information service systems, the drive test car need be in the time range of appointment (as early 6 to late 8 points), in transportation information service systems provides the region of traffic-information service, travel on main road according to normal travel speed.
In the process of moving, vehicle positioning equipment (as vehicle GPS equipment) needs to gather highdensity drive test wheel paths point data, and sampling rate need reach 1s once, and each tracing point data all comprises longitude and latitude, timestamp, instantaneous velocity, information such as travel direction.
For example, as shown in Figure 3, carry out the system architecture diagram of transport information quality evaluation for central terminal server.Because the GPS equipment that the drive test car is adopted generally has the circumference error more than 5 meters, therefore the initial trace point that collects spatially shows as a series of location points of the periphery that is distributed in drive test car institute travel.
Vehicular communication equipment passes through mobile radio network (as GPRS (General Packet Radio Service, the general packet radio service technology)/and CDMA (Code Division Multiple Access, CDMA)) tracing point data upload that vehicle positioning equipment is gathered is to central terminal server.Tracing point data in the central terminal server buffer memory fixed time section are for example carried out buffer memory to 5 minutes tracing point data of up-to-date reception.
103, central terminal server is obtained the evaluation criterion data according to roadway element data of obtaining and the tracing point data of obtaining;
Central terminal server is carried out the map match processing to the tracing point data of buffer memory, obtains the position data of drive test car on roadway element.Wherein, map match is meant by comparing current drive test car location point and numerical map, determines the accurate position of vehicle in the map road network.For example, the original gps data that input drive test car is gathered, output drive test car is in the accurate position of roadway element.
After finishing map match processing to the tracing point data, can know the accurate position of each tracing point on roadway element, thereby find the most approachingly to enter roadway element and the tracing point of unit of leaving the road, and respectively with these two tracing points as the tracing point that enters this roadway element with leave the tracing point of this roadway element.
From the tracing point data, read the timestamp of these two tracing points, wherein, the timestamp that enters the tracing point of this roadway element is existed constantly as the traffic information of this roadway element correspondence.And, with the difference of the timestamp of these two tracing points as the running time of vehicle on this roadway element.And, calculate the average velocity of vehicle on this roadway element according to the length and the running time of vehicle on this roadway element of this roadway element.
The evaluation criterion data are by many roadway elements, and the traffic information of roadway element (comprising that traffic information exists the moment, running time, average velocity) constitutes.
104, central terminal server is carried out quality assessment according to described evaluation criterion data to the traffic information data that is provided by transportation information service systems.
In step 104, as shown in Figure 4, its concrete steps can for:
401, there is the traffic information data of selecting the transportation information service systems issue constantly according to the traffic information in the evaluation criterion data.
The Real-time Traffic Information of transportation information service systems issue has the room and time attribute, thereby need exist according to the traffic information of the roadway element in the evaluation criterion data and this roadway element constantly, from the traffic information data of transportation information service systems issue, extract this roadway element and have traffic information data constantly at this traffic information.Be specifically as follows: a1, extract the corresponding traffic information data of road section that road and roadway element are showed; A2, from the traffic information data that step a1 is extracted, there is immediate traffic information data of the moment in the traffic information time of extracting the transportation information service systems issue with the traffic information of this roadway element.
402,, obtain the assessment result of running time according to the running time of each roadway element correspondence in traffic information data of choosing and the evaluation criterion data.
At first, the corresponding running time in same link unit in the traffic information data of relatively choosing and the evaluation criterion data obtains the running time error rate of this roadway element correspondence.Wherein, the computing formula of running time error rate is as follows:
Secondly, statistics distributes and cumulative distribution in the interval of each percentage range, as the assessment result of running time.For example, the interval of setting statistics is three kinds: the 1) ratio that accounts in the roadway element of all being estimated less than 10% roadway element of running time error rate; 2) ratio that in the roadway element of all being estimated, accounts for less than 20% roadway element of running time error rate; 3) ratio that in the roadway element of all being estimated, accounts for less than 30% roadway element of running time error rate.
403,, obtain the assessment result of average velocity according to the average velocity of each roadway element correspondence in traffic information data of choosing and the evaluation criterion data.
At first, the average velocity of same link unit in traffic information data of relatively choosing and the evaluation criterion data obtains the average velocity error rate of this roadway element correspondence.Wherein, average velocity error rate computing formula is as follows:
Secondly, the interval of adding up each percentage range distributes and cumulative distribution, as the assessment result of average velocity.For example, the interval of setting statistics is three kinds: the 1) ratio that accounts in the roadway element of all being estimated less than 10% roadway element of average velocity error rate; 2) ratio that in the roadway element of all being estimated, accounts for less than 20% roadway element of average velocity error rate; 3) ratio that in the roadway element of all being estimated, accounts for less than 30% roadway element of average velocity error rate.
404,, obtain the assessment result of congestion level according to the average velocity and the jam level standard of each roadway element correspondence in traffic information data of choosing and the evaluation criterion data.
At first, be respectively roadway element distribution jam level in traffic information data and the evaluation criterion data according to the jam level standard.For example, jam level standard definition table is as follows:
| Velocity range | Jam level | Coding |
| 40km/h＜=speed | Unimpeded | ??4 |
| 20km/h＜=speed＜40km/h | Slowly | ??2 |
| Speed＜20km/h | Block up | ??1 |
Secondly, the jam level coding of roadway element in contrast traffic information data and the evaluation criterion data obtains the roadway element quantity that identical jam level is encoded in traffic information data and the evaluation criterion data.And the total quantity of roadway element in roadway element quantity that obtains according to contrast and the evaluation criterion data is calculated the jam level accuracy rate.Wherein, jam level accuracy rate computing formula is as follows:
The jam level accuracy rate that will calculate according to above-mentioned formula is as the assessment result of congestion level.
The quality evaluating method of the transport information that the embodiment of the invention provides, obtain the evaluation criterion data according to the roadway element data of appointed area and the tracing point data in the fixed time section, and the traffic information data that is provided by transportation information service systems is carried out quality assessment according to described evaluation criterion data.Therefore, with the traffic information of real road accurately that obtains as evaluation criterion, the traffic information data that need issue transportation information service systems carries out quality testing accurately and efficiently, issue this transport information to the user again after reaching higher level detecting information quality, thereby the guarantee user can access the traffic-information service of reliable quality.
With said method accordingly, the embodiment of the invention also provides a kind of quality assessment device of transport information, as shown in Figure 5, this device comprises:
Road data acquiring unit 501 is used to obtain the roadway element data of appointed area;
Track data acquiring unit 502 is used to obtain the tracing point data of vehicle positioning device measuring in the fixed time section;
Normal data acquiring unit 503 is used for the tracing point data that the roadway element data obtained according to described road data acquiring unit 501 and described track data acquiring unit 502 obtain, and obtains the evaluation criterion data;
Further, described road data acquiring unit 501 specifically comprises:
Geography information is obtained subelement, is used to obtain the road geographic information data in test area, and described road geographic information data comprise path space data and road attribute data;
Nodal information obtains subelement, is used for obtaining the road geographic information data that subelement obtains according to described geography information, obtains the data message of ordinary node and connective node;
The test road obtains subelement, is used for obtaining the ordinary node that subelement obtains and the data message of connective node according to described nodal information, obtains the roadway element data in described test area;
Particular link is obtained subelement, is used for obtaining from described test road the roadway element data in the test area that subelement obtains, and obtains the roadway element data of appointed area.
Further, described track data acquiring unit 502 specifically comprises:
Track data receives subelement, is used to receive the tracing point data of the described vehicle positioning device measuring that is sent by vehicular communication equipment;
Track data buffer memory subelement is used for the tracing point data in the buffer memory fixed time section.
Further, described normal data acquiring unit 503 specifically comprises:
Position data is obtained subelement, is used for roadway element data of obtaining and the tracing point data of obtaining are mated, and obtains the position data of drive test car on roadway element;
Tracing point is determined subelement, is used for obtaining the position data of drive test car on described roadway element that subelement obtains according to described position data, the tracing point of determining to enter the tracing point of described roadway element and leaving described roadway element;
Exist and obtain subelement constantly, be used for obtaining the timestamp of the tracing point that enters described roadway element and leaving the timestamp of described roadway element, and the timestamp that will enter the tracing point of described roadway element exists constantly as the traffic information of described roadway element correspondence from described tracing point data;
Running time obtains subelement, is used for timestamp and the timestamp that leaves described roadway element according to the tracing point that enters described roadway element, obtains the running time of described roadway element correspondence;
Average velocity obtains subelement, is used for the running time according to the length and the described roadway element correspondence of described roadway element, obtains the average velocity of described roadway element correspondence;
The normal data storing sub-units, be used for roadway element data that described road data acquiring unit is obtained, the described traffic information that obtains the roadway element correspondence that subelement obtains constantly that exists exists constantly, described running time obtains the running time of the described roadway element correspondence that subelement obtains, obtain the average velocity of the described roadway element correspondence that subelement obtains with described average velocity, as described evaluation criterion data storage.
Further, described quality assessment unit 504 specifically comprises:
Traffic data obtains subelement, is used for existing constantly according to the roadway element data of described evaluation criterion data and the traffic information of roadway element correspondence, obtains corresponding traffic information data from the traffic information data that transportation information service systems provides;
Running time assessment subelement is used for the traffic information data that obtains according to the road data acquiring unit and the running time of described evaluation criterion data roadway element correspondence, obtains the assessment result of running time;
Average velocity assessment subelement is used for the traffic information data that obtains according to described road data acquiring unit and the average velocity of described evaluation criterion data roadway element correspondence, obtains the assessment result of average velocity;
Congestion level assessment subelement is used for the traffic information data that obtains according to described road data acquiring unit and the average velocity and the jam level standard of described evaluation criterion data roadway element correspondence, obtains the assessment result of congestion level.
Further, described running time assessment subelement specifically comprises:
The time error acquisition module, the running time of traffic information data that is used for relatively obtaining and described evaluation criterion data same link unit correspondence obtains the running time error rate of described roadway element correspondence;
The running time evaluation module is used for the running time error rate that obtains is carried out statistical computation, obtains the assessment result of running time;
Further, described average velocity assessment subelement specifically comprises:
The rate error acquisition module is used for the average velocity of more described traffic information data and described evaluation criterion data same link unit correspondence, obtains the average velocity error rate of described roadway element correspondence;
The average velocity evaluation module is used for the average velocity error rate that obtains is carried out statistical computation, obtains the assessment result of average velocity;
Further, described congestion level assessment subelement specifically comprises:
Transport information grade distribution module is used for the average velocity according to jam level standard and described traffic information data roadway element correspondence, for the roadway element in the described traffic information data distributes corresponding jam level:
Normal data grade distribution module is used for the average velocity according to jam level standard and described evaluation criterion data roadway element correspondence, for the roadway element in the described evaluation criterion data distributes corresponding jam level;
Road quantity acquisition module is used for obtaining the roadway element quantity that described traffic information data is identical with described evaluation criterion data roadway element and jam level is identical;
The congestion level evaluation module is used for obtaining the jam level accuracy rate, with the assessment result of described jam level accuracy rate as congestion level according to the roadway element quantity of obtaining and the total quantity of described evaluation criterion data roadway element.
The quality assessment device of the transport information that the embodiment of the invention provides, obtain the evaluation criterion data according to the roadway element data of appointed area and the tracing point data in the fixed time section, and the traffic information data that is provided by transportation information service systems is carried out quality assessment according to described evaluation criterion data.Therefore, with the traffic information of real road accurately that obtains as evaluation criterion, the traffic information data that need issue transportation information service systems carries out quality testing accurately and efficiently, issue this transport information to the user again after reaching higher level detecting information quality, thereby the guarantee user can access the traffic-information service of reliable quality.
With said method, the device accordingly, the embodiment of the invention also provides a kind of QA system of transport information, as shown in Figure 6, this system comprises the quality assessment device 604 of vehicle positioning equipment 601 and vehicular communication equipment 602 and transportation information service systems 603 and transport information;
Wherein, described vehicle positioning equipment 601 is used to measure the tracing point data of drive test car, and sends described tracing point data to described vehicular communication equipment 602;
Described vehicular communication equipment 602, be used to receive described tracing point data after, send described tracing point data to the quality assessment device 604 of described transport information;
Described transportation information service systems 603 is used for sending traffic information data to the quality assessment device 604 of described transport information;
The quality assessment device 604 of described transport information is used to obtain the roadway element data of appointed area; Obtain the tracing point data of vehicle positioning device measuring in the fixed time section; According to roadway element data of obtaining and the tracing point data of obtaining, obtain the evaluation criterion data; And, the traffic information data that is provided by transportation information service systems 603 is carried out quality assessment according to described evaluation criterion data.
Further, the quality assessment device 604 of described transport information also is used to obtain the road geographic information data in test area, and described road geographic information data comprise path space data and road attribute data; According to described road geographic information data, obtain the data message of ordinary node and connective node; And, obtain the roadway element data in described test area according to the data message of described ordinary node and connective node; From the roadway element data in described test area, obtain the roadway element data of appointed area.
Further, the quality assessment device 604 of described transport information also is used to receive the tracing point data by the vehicle positioning device measuring of vehicular communication equipment transmission; And the tracing point data in the buffer memory fixed time section.
Further, the quality assessment device 604 of described transport information also is used for roadway element data of obtaining and the tracing point data of obtaining are mated, and obtains the position data of drive test car on roadway element; According to the position data of drive test car on described roadway element, the tracing point of determining to enter the tracing point of described roadway element and leaving described roadway element; From described tracing point data, obtain the timestamp of the tracing point that enters described roadway element and leave the timestamp of described roadway element, and the timestamp that will enter the tracing point of described roadway element exists constantly as the traffic information of described roadway element correspondence; According to the timestamp and the timestamp that leaves described roadway element of the tracing point that enters described roadway element, obtain the running time of described roadway element correspondence; According to the running time of the length and the described roadway element correspondence of described roadway element, obtain the average velocity of described roadway element correspondence; With the roadway element data of obtaining, the traffic information of described roadway element correspondence exists constantly, and running time and average velocity are as described evaluation criterion data.
Further, the quality assessment device 604 of described transport information, also be used for existing constantly, from the traffic information data that transportation information service systems provides, obtain corresponding traffic information data according to the roadway element data of described evaluation criterion data and the traffic information of roadway element correspondence; According to the running time of roadway element correspondence in traffic information data that obtains and the described evaluation criterion data, obtain the assessment result of running time; According to the average velocity of roadway element correspondence in traffic information data that obtains and the described evaluation criterion data, obtain the assessment result of average velocity; According to the average velocity and the jam level standard of roadway element correspondence in traffic information data that obtains and the described evaluation criterion data, obtain the assessment result of congestion level.
The QA system of the transport information that the embodiment of the invention provides, obtain the evaluation criterion data according to the roadway element data of appointed area and the tracing point data in the fixed time section, and the traffic information data that is provided by transportation information service systems is carried out quality assessment according to described evaluation criterion data.Therefore, with the traffic information of real road accurately that obtains as evaluation criterion, the traffic information data that need issue transportation information service systems carries out quality testing accurately and efficiently, issue this transport information to the user again after reaching higher level detecting information quality, thereby the guarantee user can access the traffic-information service of reliable quality.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (13)
1, a kind of quality evaluating method of transport information is characterized in that, comprising:
Obtain the roadway element data of appointed area;
Obtain the tracing point data of vehicle positioning device measuring in the fixed time section;
According to roadway element data of obtaining and the tracing point data of obtaining, obtain the evaluation criterion data;
According to described evaluation criterion data, the traffic information data that is provided by transportation information service systems is carried out quality assessment.
2, the quality evaluating method of transport information according to claim 1 is characterized in that, the described roadway element data of obtaining the appointed area comprise:
Obtain the road geographic information data in test area, described road geographic information data comprise path space data and road attribute data;
According to described road geographic information data, obtain the data message of ordinary node and connective node;
According to the data message of described ordinary node and connective node, obtain the roadway element data in described test area;
From the roadway element data in described test area, obtain the roadway element data of appointed area.
3, the quality evaluating method of transport information according to claim 1 is characterized in that, the described tracing point data that measuring car measures of satisfying the need of positioning equipment in the fixed time section of obtaining comprise:
Reception is by the tracing point data of the vehicle positioning device measuring of vehicular communication equipment transmission;
Tracing point data in the buffer memory fixed time section.
According to the quality evaluating method of claim 1 or 2 or 3 described transport information, it is characterized in that 4, roadway element data that described basis is obtained and the tracing point data of obtaining are obtained the evaluation criterion data and comprised:
Roadway element data of obtaining and the tracing point data of obtaining are mated, obtain the position data of drive test car on roadway element;
According to the position data of drive test car on described roadway element, the tracing point of determining to enter the tracing point of described roadway element and leaving described roadway element;
From described tracing point data, obtain the timestamp of the tracing point that enters described roadway element and leave the timestamp of described roadway element, and the timestamp that will enter the tracing point of described roadway element exists constantly as the traffic information of described roadway element correspondence;
According to the timestamp and the timestamp that leaves described roadway element of the tracing point that enters described roadway element, obtain the running time of described roadway element correspondence;
According to the running time of the length and the described roadway element correspondence of described roadway element, obtain the average velocity of described roadway element correspondence;
With the roadway element data of obtaining, the traffic information of described roadway element correspondence exists constantly, and running time and average velocity are as described evaluation criterion data.
5, the quality evaluating method of transport information according to claim 4 is characterized in that, and is described according to described evaluation criterion data, the traffic information data that is provided by transportation information service systems carried out quality assessment comprise:
Traffic information according to roadway element data in the described evaluation criterion data and roadway element correspondence exists constantly, obtains corresponding traffic information data from the traffic information data that transportation information service systems provides;
According to the running time of roadway element correspondence in traffic information data that obtains and the described evaluation criterion data, obtain the assessment result of running time;
According to the average velocity of roadway element correspondence in traffic information data that obtains and the described evaluation criterion data, obtain the assessment result of average velocity;
According to the average velocity and the jam level standard of roadway element correspondence in traffic information data that obtains and the described evaluation criterion data, obtain the assessment result of congestion level.
6, the quality evaluating method of transport information according to claim 5 is characterized in that, the running time of roadway element correspondence in traffic information data that described basis is obtained and the described evaluation criterion data, and the assessment result of obtaining running time comprises:
The running time of same link unit correspondence in traffic information data that relatively obtains and the described evaluation criterion data obtains the running time error rate of described roadway element correspondence;
The running time error rate that obtains is carried out statistical computation, obtain the assessment result of running time;
The average velocity of roadway element correspondence in traffic information data that described basis is obtained and the described evaluation criterion data, the assessment result of obtaining average velocity comprises:
The average velocity of same link unit correspondence in more described traffic information data and the described evaluation criterion data obtains the average velocity error rate of described roadway element correspondence;
The average velocity error rate that obtains is carried out statistical computation, obtain the assessment result of average velocity;
The average velocity and the jam level standard of roadway element correspondence in traffic information data that described basis is obtained and the described evaluation criterion data, the assessment result of obtaining congestion level comprises:
According to the average velocity of roadway element correspondence in jam level standard and the described traffic information data, for the roadway element in the described traffic information data distributes corresponding jam level;
According to the average velocity of roadway element correspondence in jam level standard and the described evaluation criterion data, for the roadway element in the described evaluation criterion data distributes corresponding jam level;
Obtain the roadway element quantity that roadway element is identical and jam level is identical in described traffic information data and the described evaluation criterion data;
According to the total quantity of roadway element in roadway element quantity of obtaining and the described evaluation criterion data, obtain the jam level accuracy rate, with the assessment result of described jam level accuracy rate as congestion level.
7, a kind of quality assessment device of transport information is characterized in that, comprising:
The road data acquiring unit is used to obtain the roadway element data of appointed area;
The track data acquiring unit is used to obtain the tracing point data of vehicle positioning device measuring in the fixed time section;
The normal data acquiring unit is used for the tracing point data that the roadway element data obtained according to described road data acquiring unit and described track data acquiring unit obtain, and obtains the evaluation criterion data;
The quality assessment unit is used for the evaluation criterion data obtained according to described normal data acquiring unit, and the traffic information data that is provided by transportation information service systems is carried out quality assessment.
8, the quality assessment device of transport information according to claim 7 is characterized in that, described road data acquiring unit comprises:
Geography information is obtained subelement, is used to obtain the road geographic information data in test area, and described road geographic information data comprise path space data and road attribute data;
Nodal information obtains subelement, is used for obtaining the road geographic information data that subelement obtains according to described geography information, obtains the data message of ordinary node and connective node;
The test road obtains subelement, is used for obtaining the ordinary node that subelement obtains and the data message of connective node according to described nodal information, obtains the roadway element data in described test area;
Particular link is obtained subelement, is used for obtaining from described test road the roadway element data in the test area that subelement obtains, and obtains the roadway element data of appointed area.
9, the quality assessment device of transport information according to claim 7 is characterized in that, described track data acquiring unit comprises:
Track data receives subelement, is used to receive the tracing point data of the described vehicle positioning device measuring that is sent by vehicular communication equipment;
Track data buffer memory subelement is used for the tracing point data in the buffer memory fixed time section.
According to the quality assessment device of claim 7 or 8 or 9 described transport information, it is characterized in that 10, described normal data acquiring unit comprises:
Position data is obtained subelement, is used for roadway element data of obtaining and the tracing point data of obtaining are mated, and obtains the position data of drive test car on roadway element;
Tracing point is determined subelement, is used for obtaining the position data of drive test car on described roadway element that subelement obtains according to described position data, the tracing point of determining to enter the tracing point of described roadway element and leaving described roadway element;
Exist and obtain subelement constantly, be used for obtaining the timestamp of the tracing point that enters described roadway element and leaving the timestamp of described roadway element, and the timestamp that will enter the tracing point of described roadway element exists constantly as the traffic information of described roadway element correspondence from described tracing point data;
Running time obtains subelement, is used for timestamp and the timestamp that leaves described roadway element according to the tracing point that enters described roadway element, obtains the running time of described roadway element correspondence;
Average velocity obtains subelement, is used for the running time according to the length and the described roadway element correspondence of described roadway element, obtains the average velocity of described roadway element correspondence;
The normal data storing sub-units, be used for roadway element data that described road data acquiring unit is obtained, the described traffic information that obtains the roadway element correspondence that subelement obtains constantly that exists exists constantly, described running time obtains the running time of the described roadway element correspondence that subelement obtains, obtain the average velocity of the described roadway element correspondence that subelement obtains with described average velocity, as described evaluation criterion data storage.
11, the quality assessment device of transport information according to claim 10 is characterized in that, described quality assessment unit comprises:
Traffic data obtains subelement, is used for existing constantly according to the roadway element data of described evaluation criterion data and the traffic information of roadway element correspondence, obtains corresponding traffic information data from the traffic information data that transportation information service systems provides;
Running time assessment subelement is used for the traffic information data that obtains according to the road data acquiring unit and the running time of described evaluation criterion data roadway element correspondence, obtains the assessment result of running time;
Average velocity assessment subelement is used for the traffic information data that obtains according to described road data acquiring unit and the average velocity of described evaluation criterion data roadway element correspondence, obtains the assessment result of average velocity;
Congestion level assessment subelement is used for the traffic information data that obtains according to described road data acquiring unit and the average velocity and the jam level standard of described evaluation criterion data roadway element correspondence, obtains the assessment result of congestion level.
12, the quality assessment device of transport information according to claim 10 is characterized in that, described running time assessment subelement comprises:
The time error acquisition module, the running time of traffic information data that is used for relatively obtaining and described evaluation criterion data same link unit correspondence obtains the running time error rate of described roadway element correspondence;
The running time evaluation module is used for the running time error rate that obtains is carried out statistical computation, obtains the assessment result of running time;
Described average velocity assessment subelement comprises:
The rate error acquisition module is used for the average velocity of more described traffic information data and described evaluation criterion data same link unit correspondence, obtains the average velocity error rate of described roadway element correspondence;
The average velocity evaluation module is used for the average velocity error rate that obtains is carried out statistical computation, obtains the assessment result of average velocity;
Described congestion level assessment subelement comprises:
Transport information grade distribution module is used for the average velocity according to jam level standard and described traffic information data roadway element correspondence, for the roadway element in the described traffic information data distributes corresponding jam level;
Normal data grade distribution module is used for the average velocity according to jam level standard and described evaluation criterion data roadway element correspondence, for the roadway element in the described evaluation criterion data distributes corresponding jam level;
Road quantity acquisition module is used for obtaining the roadway element quantity that described traffic information data is identical with described evaluation criterion data roadway element and jam level is identical;
The congestion level evaluation module is used for obtaining the jam level accuracy rate, with the assessment result of described jam level accuracy rate as congestion level according to the roadway element quantity of obtaining and the total quantity of described evaluation criterion data roadway element.
13, a kind of QA system of transport information is characterized in that, comprises vehicle positioning equipment and vehicular communication equipment and transportation information service systems and as the quality assessment device of any described transport information of claim 7 to 12;
Wherein, described vehicle positioning equipment is used to measure the tracing point data of drive test car, and sends described tracing point data to described vehicular communication equipment;
Described vehicular communication equipment, be used to receive described tracing point data after, send described tracing point data to the quality assessment device of described transport information;
Described transportation information service systems is used for sending traffic information data to the quality assessment device of described transport information.
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