CN105654561B - Multilane free-flow vehicle matching process - Google Patents

Multilane free-flow vehicle matching process Download PDF

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CN105654561B
CN105654561B CN201510971379.5A CN201510971379A CN105654561B CN 105654561 B CN105654561 B CN 105654561B CN 201510971379 A CN201510971379 A CN 201510971379A CN 105654561 B CN105654561 B CN 105654561B
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location data
time location
vehicle
obu
link
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CN105654561A (en
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胡攀攀
李智
房颜明
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Beijing Wanji Technology Co Ltd
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Beijing Wanji Technology Co Ltd
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
    • G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/40—Scenes; Scene-specific elements in video content
    • G06V20/46—Extracting features or characteristics from the video content, e.g. video fingerprints, representative shots or key frames
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/60—Type of objects
    • G06V20/62—Text, e.g. of license plates, overlay texts or captions on TV images
    • G06V20/625—License plates

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Finance (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Traffic Control Systems (AREA)

Abstract

The present invention provides multilane free-flow vehicle matching process, including：Vehicle detection subsystem is obtained in TiVehicle time position data (the T of detectioni, Xi, Yi)；According to Yi, vehicle enter and leave free flow transaction scene ordinate YinAnd Yout, it is determined that as chain head data creation time location Data-Link or being filled with the time location Data-Link created using the time location data；Obtain every OBU time location data (T that business subsystem obtains when every OBU and RSU merchandisej, Xj, Yj)；In TjWith TiDifference, XjWith XiDifference and YjWith YiDifference when being respectively smaller than default first, second and third threshold value, it is determined that (Tj, Xj, Yj) belonging to OBU and (Ti, Xi, Yi) belonging to time location Data-Link complete vehicle match.This method can precisely match the information of vehicles of the free streaming system different sub-systems collection of multilane, ensure the accuracy of current information of vehicles.

Description

Multilane free-flow vehicle matching process
Technical field
The present invention relates to technical field of intelligent traffic, more particularly to a kind of multilane free-flow vehicle matching process.
Background technology
The free Flow Technique of multilane is in existing electronic charging system without parking (Electronic Toll Collection, abbreviation ETC) technically develop, it is the one kind not limited by driving conditions such as speed, track, obstructions Electric non-stop toll technology.At present, with reference to China's actual conditions, the electronic charging DSRC based on national standard 5.8GHz The free Flow Technique of multilane of technology is the most feasible.
In the free streaming system of multilane, roadside unit (Road Side Unit, abbreviation RSU) and car should can be completed The transaction of carrier unit (On Board Unit, abbreviation OBU) (i.e. vehicle carried electronic label), provided accurately for follow-up inspection again Evidence, therefore the free streaming system of multilane generally also comprising vehicle detection subsystem, is merchandised in addition to comprising track master control system Multiple subsystems such as subsystem and candid photograph subsystem, vehicle detection subsystem obtain vehicle location detected in detection time etc. Information of vehicles, business subsystem obtain communication position, call duration time and the car plate that OBU during ETC transaction occurs for each OBU and RSU The information of vehicles such as information, capture subsystem and predeterminable area is captured, candid photograph time when capturing image and vehicle can be obtained The information of vehicles such as position.Vehicle match in the existing free streaming system of multilane is all by judging the period in setting Vehicle location interior, that vehicle detection detects with positioning subsystem, and bus or train route communication detect with electronic tag positioning subsystem Vehicle carried electronic label position central point transverse and longitudinal coordinate difference whether be less than setting value come carry out legal vehicle, illegal vehicle with And the judgement of OBU vehicles is not installed.This matching process has two：When by setting regular time section, next Many situations about unmatching occur in the position coordinates gathered with different sub-systems in the period, and cause whole system Matching rate is relatively low；Second, simple passage time location matches can be because various positioning antennas (such as phased array antenna based on DBF) Reflected, blocked under the ambient conditions that is actually open to traffic, being easy to positioning failure or Wrong localization occur under the influence of the condition such as low electricity Phenomenon, that is, the more vehicle that it fails to match occurs.
In consideration of it, how precisely to be matched the information of vehicles that the different sub-systems of the free streaming system of multilane gather, To ensure that the accuracy of the information of vehicles of each current vehicle turns into the current technical issues that need to address.
The content of the invention
To solve above-mentioned technical problem, the present invention provides a kind of multilane free-flow vehicle matching process, can will be more The information of vehicles of the different sub-systems collection of the free streaming system in track is precisely matched, to ensure the vehicle of each current vehicle The accuracy of information.
In a first aspect, the present invention provides a kind of multilane free-flow vehicle matching process, including：
Vehicle detection subsystem is obtained in detection time TiTime location data (the T of the vehicle detectedi, Xi, Yi), its In, XiFor the abscissa of the position of the vehicle, YiFor the ordinate of the position of the vehicle；
According to Yi, vehicle freedom of entry stream transaction scene ordinate YinThe vertical seat of free flow transaction scene is left with vehicle Mark Yout, it is determined that the time location data (T with the vehiclei, Xi, Yi) chain head data creation time location Data-Link is used as, or By (Ti, Xi, Yi) fill to the time location Data-Link created；
Obtain time location data of the business subsystem in every OBU and RSU every OBU for occurring to obtain during ETC transaction (Tj, Xj, Yj), wherein, TjFor the call duration time of this transaction, XjFor the abscissa of this transaction communications position, YjHanded over for this The ordinate of easy communication position；
In TjWith TiDifference be less than preset first threshold value and XjWith XiDifference be less than default Second Threshold and YjWith Yi Difference when being less than default three threshold value, it is determined that (Tj, Xj, Yj) belonging to OBU and (Ti, Xi, Yi) belonging to time location Data-Link it is complete Into vehicle match.
Alternatively, the YinAnd YoutIt is the projection side according to multilane free flow trading range on road direction Boundary's difference is set in advance.
Alternatively, it is described according to Yi, vehicle freedom of entry stream transaction scene longitudinal coordinate YinFree flow is left with vehicle The longitudinal coordinate Y for scene of merchandisingout, it is determined that the time location data (T with the vehiclei, Xi, Yi) it is used as the chain head data creation time Position data chain, or by (Ti, Xi, Yi) fill to the time location Data-Link created, including：
If YiWith YinDifference be less than or equal to default 4th threshold value, it is determined that the vehicle has just enter into the free flow trading floor Scape, with the time location data (T of the vehiclei, Xi, Yi) it is used as chain head data creation time location Data-Link；
If YiWith YoutDifference be less than or equal to default 5th threshold value, it is determined that the vehicle will leave the free flow and hand over Easy scene, judges XiAnd whether the difference of the abscissa of mantissa's evidence meets default first in each time location Data-Link not finished up Scope, judge YiAnd whether the difference of the ordinate of mantissa's evidence meets default second model in each time location Data-Link not finished up Enclose and judge TiAnd whether the difference of the detection time of mantissa's evidence meets default the in each time location Data-Link not finished up Three scopes, if above-mentioned in a certain time location Data-Link not finished up judge while meet three times, it is determined that the time of the vehicle Position data (Ti, Xi, Yi) belong to the time location Data-Link not finished up, by (Ti, Xi, Yi) filled as last-of-chain data to it The afterbody of affiliated time location Data-Link；
If YiWith YinDifference be more than default 4th threshold value and YiWith YoutDifference be more than default 5th threshold value, it is determined that The vehicle is had been located in the free flow transaction scene, judges XiWith mantissa's evidence in each time location Data-Link for not finishing up Whether the difference of abscissa meets preset first range, judges YiWith in each time location Data-Link for not finishing up mantissa's evidence it is vertical Whether the difference of coordinate meets preset second range and judges TiWith mantissa's evidence in each time location Data-Link for not finishing up Whether the difference of detection time meets default 3rd scope, if above-mentioned in a certain time location Data-Link not finished up judge together three times When meet, it is determined that the time location data (T of the vehiclei, Xi, Yi) belong to the time location Data-Link not finished up, by (Ti, Xi, Yi) filled as intermediate data to the afterbody of its affiliated time location Data-Link.
Alternatively, when the OBU is matched with time location Data-Link, preferable method is matched using multiframe, often obtained A certain OBU time location data are taken once, are just once matched the OBU with time location Data-Link；
Selection and the OBU the match is successful most time location Data-Links of number, as what finally the match is successful with the OBU Time location Data-Link.
Alternatively, it is described obtain business subsystem every OBU and the RSU every OBU for occurring to obtain during ETC transaction when Between position data (Tj, Xj, Yj), including：
Using the method for multiframe Optimum Matching, obtain business subsystem and obtained when ETC transaction occurs for an every OBU and RSU Every OBU time location data；
Select every OBU confidence level highest time location data (Tj, Xj, Yj) as with (Ti, Xi, Yi) belonging to the time Position data chain carries out the time location data of vehicle match.
Alternatively, described according to Yi, vehicle freedom of entry stream transaction scene ordinate YinFree flow is left with vehicle The ordinate Y for scene of merchandisingout, it is determined that the time location data (T with the vehiclei, Xi, Yi) meta when being used as chain head data creation Put Data-Link, or by (Ti, Xi, Yi) fill to the time location Data-Link created, methods described also includes：
Obtain the time location data (T for capturing the vehicle obtained when subsystem is captured to predeterminable areak, Xk, Yk), Wherein, TkTo capture time, XkThe abscissa of the position of vehicle or car plate for candid photograph, YkThe position of vehicle or car plate for candid photograph The ordinate put；
In TkWith TiDifference be less than default 6th threshold value and XkWith XiDifference be less than default 7th threshold value and YkWith Yi Difference when being less than default eight threshold value, it is determined that (Tk, Xk, Yk) belonging to capture picture and (Ti, Xi, Yi) belonging to time location data Chain completes vehicle match.
Alternatively, in the acquisition business subsystem every OBU and RSU every OBU's for occurring to obtain during ETC transaction Time location data (Tj, Xj, Yj) after, methods described also includes：
Obtain the time location data (T for capturing the vehicle obtained when subsystem is captured to predeterminable areak, Xk, Yk), Wherein, TkTo capture time, XkThe abscissa of the position of vehicle or car plate for candid photograph, YkThe position of vehicle or car plate for candid photograph The ordinate put；
In TkWith TjDifference be less than default 9th threshold value and XkWith XjDifference be less than default tenth threshold value and YkWith Yj Difference when being less than default 11 threshold value, it is determined that (Tk, Xk, Yk) belonging to capture picture and (Tj, Xj, Yj) belonging to OBU complete car Matching.
Alternatively, when the OBU is matched with capturing picture, preferable method is matched using multiframe, often obtained once OBU time location data, just the OBU is once matched with capturing picture；
Selection and the OBU the match is successful most candid photograph pictures of number, as finally with the OBU candid photograph figures that the match is successful Piece.
Alternatively, it is described obtain business subsystem every OBU and the RSU every OBU for occurring to obtain during ETC transaction when Between position data (Tj, Xj, Yj), including：
Using the method for multiframe Optimum Matching, obtain business subsystem and obtained when ETC transaction occurs for an every OBU and RSU Every OBU time location data；
Select every OBU confidence level highest time location data (Tj, Xj, Yj) as with (Tk, Xk, Yk) belonging to capture Picture carries out the time location data of vehicle match.
Alternatively, methods described also includes：
Obtain the candid photograph picture captured and obtained when subsystem is captured to predeterminable area；
Car license recognition is carried out to the candid photograph picture, obtains license plate recognition result；
Obtain license board information of the business subsystem in every OBU and RSU every OBU for occurring to obtain during ETC transaction；
Obtain the similarity of the license plate recognition result and the license board information of every OBU；
When the similarity is less than or equal to default 12 threshold value, the candid photograph picture is determined and its when the match is successful Between position Data-Link and the OBU complete vehicle match.
As shown from the above technical solution, multilane free-flow vehicle matching process of the invention, can be free by multilane Streaming system different sub-systems collection information of vehicles precisely matched, ensure each pass through vehicle information of vehicles it is accurate Property, reduce the follow-up workload collected evidence and checked.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet for multilane free-flow vehicle matching process that one embodiment of the invention provides.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only Only it is part of the embodiment of the present invention, rather than whole embodiments.Based on embodiments of the invention, ordinary skill people The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 shows the schematic flow sheet for the multilane free-flow vehicle matching process that one embodiment of the invention provides, such as Shown in Fig. 1, the multilane free-flow vehicle matching process of the present embodiment is as described below.
101st, vehicle detection subsystem is obtained in detection time TiTime location data (the T of the vehicle detectedi, Xi, Yi), wherein, XiFor the abscissa of the position of the vehicle, YiFor the ordinate of the position of the vehicle.
It should be noted that the ordinate (being represented with Y) in the present embodiment refers to along the coordinate on road direction, horizontal seat Mark (being represented with X) refers to along the coordinate on road direction.
It will be appreciated that the position coordinates of vehicle is (X in step 101i, Yi), refer to that the detection of vehicle detection subsystem obtains The position coordinates of headstock central point or the position coordinates of certain point on the vehicle body that is calculated according to detection data.
102nd, according to Yi, vehicle freedom of entry stream transaction scene ordinate YinFree flow transaction scene is left with vehicle Ordinate Yout, it is determined that the time location data (T with the vehiclei, Xi, Yi) chain head data creation time location Data-Link is used as, Or by (Ti, Xi, Yi) fill to the time location Data-Link created.
In a particular application, the step 102, it may include：
If YiWith YinDifference be less than or equal to default 4th threshold value, it is determined that the vehicle has just enter into the free flow trading floor Scape, with the time location data (T of the vehiclei, Xi, Yi) it is used as chain head data creation time location Data-Link；
If YiWith YoutDifference be less than or equal to default 5th threshold value, it is determined that the vehicle will leave the free flow and hand over Easy scene, judges XiAnd whether the difference of the abscissa of mantissa's evidence meets default first in each time location Data-Link not finished up Scope, judge YiAnd whether the difference of the ordinate of mantissa's evidence meets default second model in each time location Data-Link not finished up Enclose and judge TiAnd whether the difference of the detection time of mantissa's evidence meets default the in each time location Data-Link not finished up Three scopes, if above-mentioned in a certain time location Data-Link not finished up judge while meet three times, it is determined that the time of the vehicle Position data (Ti, Xi, Yi) belong to the time location Data-Link not finished up, by (Ti, Xi, Yi) filled as last-of-chain data to it The afterbody of affiliated time location Data-Link；
If YiWith YinDifference be more than default 4th threshold value and YiWith YoutDifference be more than default 5th threshold value, it is determined that The vehicle is had been located in the free flow transaction scene, judges XiWith mantissa's evidence in each time location Data-Link for not finishing up Whether the difference of abscissa meets preset first range, judges YiWith in each time location Data-Link for not finishing up mantissa's evidence it is vertical Whether the difference of coordinate meets preset second range and judges TiWith mantissa's evidence in each time location Data-Link for not finishing up Whether the difference of detection time meets default 3rd scope, if above-mentioned in a certain time location Data-Link not finished up judge together three times When meet, it is determined that the time location data (T of the vehiclei, Xi, Yi) belong to the time location Data-Link not finished up, by (Ti, Xi, Yi) filled as intermediate data to the afterbody of its affiliated time location Data-Link.
Wherein, Y described in step 102inAnd YoutBe according to multilane free flow trading range on road direction Projected boundary difference is set in advance.
It will be appreciated that after step 102, the time location Data-Link of acquisition can be with [(T0, X0, Y0)…(Ti, Xi, Yi)…(TE, XE, YE)] represent.
103rd, time location of the business subsystem in every OBU and RSU every OBU for occurring to obtain during ETC transaction is obtained Data (Tj, Xj, Yj), wherein, TjFor the call duration time of this transaction, XjFor the abscissa of this transaction communications position, YjFor this The ordinate of secondary transaction communications position.
In a particular application, during being traded of RSU and OBU, RSU can communicate repeatedly with OBU, RSU The upward signal for often receiving once the OBU just obtains a time location data (comprising call duration time and positional information coordinate), So multiple time location data that same OBU can be obtained in the step 103 (include multiple call duration times and position Information coordinate), but due to environment and block, the influence of condition such as reflect, it is possible to RSU positioning occur unsuccessfully or Wrong localization Situation.So in the step 103, business subsystem can be obtained each using the method for multiframe Optimum Matching The every OBU obtained during ETC transaction time location data occur for OBU and RSU；When selecting every OBU confidence level highest Between position data (Tj, Xj, Yj) (as preferred site coordinate is located in the range of trading floor scape, or give up positioning failure time and Positional information etc.) as with (Ti, Xi, Yi) belonging to time location Data-Link carry out vehicle match time location data.
104th, in TjWith TiDifference be less than preset first threshold value A1(i.e. | Tj-Ti|<A1) and XjWith XiDifference be less than it is pre- If Second Threshold B1(i.e. | Xj-Xi|<B1) and YjWith YiDifference be less than default 3rd threshold value C1(i.e. | Yj-Yi|<C1) when, it is determined that (Tj, Xj, Yj) belonging to OBU and (Ti, Xi, Yi) belonging to time location Data-Link complete vehicle match.
In a particular application, for example, when the OBU is matched with time location Data-Link, multiframe can be used With preferable method, a certain OBU time location data are often obtained once, the OBU and time location Data-Link are just carried out one Secondary matching；
Selection and the OBU the match is successful most time location Data-Links of number, as what finally the match is successful with the OBU Time location Data-Link.
It will be appreciated that step 104 can be carried out all OBU not matched with all time location Data-Links not matched Matching.
It will be appreciated that by presetting A1、B1And C1, the mistake of the vehicle match of OBU and time location Data-Link can be limited Poor allowed band.
The multilane free-flow vehicle matching process of the present embodiment, can be by vehicle detection of the free streaming system of multilane System is precisely matched with the information of vehicles that business subsystem gathers, to ensure the accurate of the information of vehicles of each current vehicle Property, the follow-up workload collected evidence and checked can be reduced.
In a concrete application, after above-mentioned steps 102, the present embodiment methods described can also be included not shown in figure Step S1 and S2：
S1, obtain the time location data (T for capturing the vehicle obtained when subsystem is captured to predeterminable areak, Xk, Yk), wherein, TkTo capture time, XkThe abscissa of the position of vehicle or car plate for candid photograph, YkFor the vehicle or car plate of candid photograph Position ordinate.
S2, in TkWith TiDifference be less than default 6th threshold value A2(i.e. | Tk-Ti|<A2) and XkWith XiDifference be less than it is default 7th threshold value B2(i.e. | Xk-Xi|<B2) and YkWith YiDifference be less than default 8th threshold value C2(i.e. | Yk-Yi|<C2) when, it is determined that (Tk, Xk, Yk) belonging to capture picture and (Ti, Xi, Yi) belonging to time location Data-Link complete vehicle match.
It will be appreciated that step S2 can be by all candid photograph pictures not matched and all time location Data-Links not matched Matched.
It will be appreciated that by presetting A2、B2And C2, the vehicle for capturing picture and time location Data-Link can be limited The error allowed band matched somebody with somebody.
It will be appreciated that the position coordinates of the vehicle or car plate in above-mentioned candid photograph picture, can be by capturing camera to capturing Acquisition is identified in picture, (in most cases, can also be captured by carrying out matching acquisition with vehicle detection subsystem in subsystem The trigger signal of candid photograph camera sent by vehicle detection subsystem, the matching logic of the two is relatively simple, can be by touching Hair time and trigger position directly give).
Pass through above-mentioned steps S1 and S2, the multilane free-flow vehicle matching process of the present embodiment, additionally it is possible to by multilane The candid photograph subsystem of free streaming system is precisely matched with the information of vehicles that vehicle detection subsystem gathers, and ensures that each is current The accuracy of the information of vehicles of vehicle, reduce the follow-up workload collected evidence and checked.
In a concrete application, after above-mentioned steps 103, the present embodiment methods described can also be included not shown in figure Step T1 and T2：
T1, obtain the time location data (T for capturing the vehicle obtained when subsystem is captured to predeterminable areak, Xk, Yk), wherein, TkTo capture time, XkThe abscissa of the position of vehicle or car plate for candid photograph, YkFor the vehicle or car plate of candid photograph Position ordinate.
T2, in TkWith TjDifference be less than default 9th threshold value A3(i.e. | Tk-Tj|<A3) and XkWith XjDifference be less than it is default Tenth threshold value B3(i.e. | Xk-Xj|<B3) and YkWith YjDifference be less than default 11st threshold value C3(i.e. | Yk-Yj|<C3) when, it is determined that (Tk, Xk, Yk) belonging to capture picture and (Tj, Xj, Yj) belonging to OBU complete vehicle match.
In a particular application, during being traded of RSU and OBU, RSU can communicate repeatedly with OBU, RSU The upward signal for often receiving once the OBU just obtains a time location data (comprising call duration time and positional information coordinate), So multiple time location data that same OBU can be obtained in the step 103 (include multiple call duration times and position Information coordinate), but due to environment and block, the influence of condition such as reflect, it is possible to RSU positioning occur unsuccessfully or Wrong localization Situation.So in the step 103, business subsystem can be obtained in every OBU using the method for multiframe Optimum Matching With the every OBU obtained during RSU generation ETC transaction time location data；Meta when selecting every OBU confidence level highest Put data (Tj, Xj, Yj) (as preferred site coordinate is located in the range of trading floor scape, or give up time and the position of positioning failure Information etc.) as with (Tk, Xk, Yk) belonging to capture picture carry out vehicle match time location data.
In a particular application, for example, when the OBU is matched with capturing picture, multiframe matching can be used preferred Method, often obtain an OBU time location data, just by the OBU with candid photograph picture once matched；
Selection and the OBU the match is successful most candid photograph pictures of number, as finally with the OBU candid photograph figures that the match is successful Piece.
It will be appreciated that step T2 can be matched all OBU not matched with all candid photograph pictures not matched.
It will be appreciated that by presetting A3、B3And C3, can limit the error of vehicle match of the OBU with capturing picture allows Scope.
Pass through above-mentioned steps T1 and T2, the multilane free-flow vehicle matching process of the present embodiment, additionally it is possible to by multilane The business subsystem of free streaming system is precisely matched with capturing the information of vehicles of subsystem collection, ensures each current vehicle Information of vehicles accuracy, reduce follow-up collect evidence and the workload of inspection.
In another concrete application, the present embodiment methods described can also include the step P1-P5 not shown in figure：
P1, obtain the candid photograph picture captured and obtained when subsystem is captured to predeterminable area；
P2, Car license recognition is carried out to the candid photograph picture, obtain license plate recognition result；
P3, obtain license board information of the business subsystem in every OBU and RSU every OBU for occurring to obtain during ETC transaction；
P4, the similarity for obtaining the license plate recognition result and the license board information of every OBU；
P5, when the similarity is less than or equal to default 12 threshold value, determine the candid photograph picture and its match is successful Time location Data-Link and the OBU complete vehicle match.
It will be appreciated that because license plate recognition result is often easy gibberish symbol or identified because of the influence of ambient light The phenomenon of mistake, so, predeterminable 12nd threshold value in step P5, to determine the candid photograph picture and its when the match is successful Between position Data-Link and the OBU complete vehicle match.
Pass through above-mentioned steps P1-P5, the multilane free-flow vehicle matching process of the present embodiment, additionally it is possible to by multilane certainly Precisely matched by the business subsystem of streaming system with capturing the information of vehicles of subsystem collection, OBU positioning failures can be reduced Or influence of the mistake to vehicle match, ensure the accuracy of the information of vehicles of each current vehicle, reduce follow-up evidence obtaining and inspection Workload.
It should be noted that the vehicle match between each subsystem of the free streaming system of the above-mentioned multilane of the present embodiment does not have Sequencing, each subsystem obtain time location data or the number that a time location data have then obtained with other subsystems Once matched according to chain, wait other subsystems to obtain new time location data if the match is successful and matched.
It should be noted that the vehicle that the present embodiment detects according to vehicle detection subsystem enters and leaves free flow transaction The time of scene, and the vehicle location coordinate detected within this period are each freedom of entry stream transaction scene (a complete time location Data-Link includes vehicle settling time position data chain：Vehicle leaves scene process from entering Each position coordinates for the vehicle that middle vehicle detection subsystem obtains and corresponding time), then it will be merchandised in process of exchange (the including the time) positional informations of OBU caused by subsystem or candid photograph information are matched with above-mentioned time location Data-Link, The rule matched somebody with somebody mainly has：
1st, the detection time (moment) of vehicle detection subsystem, the call duration time (moment) of business subsystem, candid photograph subsystem The candid photograph time (moment) of system is all entered and left in the time range of scene what vehicle detecting system detected, this time It is not a fixed value set, but with the change of actual train-passing through conditions；
2nd, time principle when each subsystem carries out time location matching be detection time, call duration time and capture the time it Difference is all in respective preset threshold range.
Compared with prior art, the present embodiment does not set regular time matching range, but free according to vehicles while passing The call duration time of stream transaction scene time and OBU upward signal sets time match rule, solves because of OBU exchange hours not Vehicle match failure or wrong phenomenon caused by it is determined that, in addition, what the present embodiment was also matched using repeatedly matching and car plate Method solves the problems, such as the vehicle match mistake caused by RSU positions failure or Wrong localization to vehicle-mounted OBU, improves more cars Information of vehicles matching degree under road free flow between business subsystem, vehicle detection subsystem and candid photograph subsystem.
" first " and " second " etc. are not that regulation is made to sequencing in embodiments of the present invention, simply to title Difference is made, in embodiments of the present invention, does not make any restriction.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey Sequence upon execution, execution the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology The scope of scheme.

Claims (9)

  1. A kind of 1. multilane free-flow vehicle matching process, it is characterised in that including：
    Vehicle detection subsystem is obtained in detection time TiTime location data (the T of the vehicle detectedi, Xi, Yi), wherein, Xi For the abscissa of the position of the vehicle, YiFor the ordinate of the position of the vehicle；
    According to Yi, vehicle freedom of entry stream transaction scene ordinate YinThe ordinate of free flow transaction scene is left with vehicle Yout, it is determined that the time location data (T with the vehiclei, Xi, Yi) chain head data creation time location Data-Link is used as, or will (Ti, Xi, Yi) fill to the time location Data-Link created；
    Using the method for multiframe Optimum Matching, acquisition business subsystem obtains every when ETC transaction occurs for an every OBU and RSU One OBU time location data, select every OBU confidence level highest time location data (Tj, Xj, Yj) as with (Ti, Xi, Yi) belonging to time location Data-Link carry out vehicle match time location data, wherein, TjFor this transaction communication when Between, XjFor the abscissa of this transaction communications position, YjFor the ordinate of this transaction communications position；
    In TjWith TiDifference be less than preset first threshold value and XjWith XiDifference be less than default Second Threshold and YjWith YiDifference When value is less than default three threshold value, it is determined that (Tj, Xj, Yj) belonging to OBU and (Ti, Xi, Yi) belonging to time location Data-Link complete car Matching.
  2. 2. according to the method for claim 1, it is characterised in that the YinAnd YoutIt is according to multilane free flow transaction model The projected boundary difference being trapped among on road direction is set in advance.
  3. 3. according to the method for claim 1, it is characterised in that described according to Yi, vehicle freedom of entry stream transaction scene it is vertical To coordinate YinThe longitudinal coordinate Y of free flow transaction scene is left with vehicleout, it is determined that the time location data (T with the vehiclei, Xi, Yi) it is used as chain head data creation time location Data-Link, or by (Ti, Xi, Yi) fill to the time location data created Chain, including：
    If YiWith YinDifference be less than or equal to default 4th threshold value, it is determined that the vehicle has just enter into the free flow transaction scene, With the time location data (T of the vehiclei, Xi, Yi) it is used as chain head data creation time location Data-Link；
    If YiWith YoutDifference be less than or equal to default 5th threshold value, it is determined that the vehicle will leave the free flow trading floor Scape, judge XiAnd whether the difference of the abscissa of mantissa's evidence meets default first model in each time location Data-Link not finished up Enclose, judge YiAnd whether the difference of the ordinate of mantissa's evidence meets default second model in each time location Data-Link not finished up Enclose and judge TiAnd whether the difference of the detection time of mantissa's evidence meets default the in each time location Data-Link not finished up Three scopes, if above-mentioned in a certain time location Data-Link not finished up judge while meet three times, it is determined that the time of the vehicle Position data (Ti, Xi, Yi) belong to the time location Data-Link not finished up, by (Ti, Xi, Yi) filled as last-of-chain data to it The afterbody of affiliated time location Data-Link；
    If YiWith YinDifference be more than default 4th threshold value and YiWith YoutDifference be more than default 5th threshold value, it is determined that the car Have been located in the free flow transaction scene, judge XiWith the horizontal seat of mantissa's evidence in each time location Data-Link for not finishing up Whether the difference of mark meets preset first range, judges YiWith the ordinate of mantissa's evidence in each time location Data-Link for not finishing up Difference whether meet preset second range and judge TiWith the detection of mantissa's evidence in each time location Data-Link for not finishing up Whether the difference of time meets default 3rd scope, if above-mentioned in a certain time location Data-Link not finished up judge while expire three times Foot, it is determined that the time location data (T of the vehiclei, Xi, Yi) belong to the time location Data-Link not finished up, by (Ti, Xi, Yi) filled as intermediate data to the afterbody of its affiliated time location Data-Link.
  4. 4. according to the method for claim 1, it is characterised in that when the OBU is matched with time location Data-Link, adopt Preferable method is matched with multiframe, a certain OBU time location data are often obtained once, just by the OBU and time location data Chain is once matched；
    Selection and the OBU the match is successful most time location Data-Links of number, as finally with the OBU times that the match is successful Position data chain.
  5. 5. according to the method for claim 1, it is characterised in that described according to Yi, vehicle freedom of entry stream transaction scene Ordinate YinThe ordinate Y of free flow transaction scene is left with vehicleout, it is determined that the time location data (T with the vehiclei, Xi, Yi) it is used as chain head data creation time location Data-Link, or by (Ti, Xi, Yi) fill to the time location Data-Link created Afterwards, methods described also includes：
    Obtain the time location data (T for capturing the vehicle obtained when subsystem is captured to predeterminable areak, Xk, Yk), wherein, TkTo capture time, XkThe abscissa of the position of vehicle or car plate for candid photograph, YkIndulge the position of vehicle or car plate for candid photograph Coordinate；
    In TkWith TiDifference be less than default 6th threshold value and XkWith XiDifference be less than default 7th threshold value and YkWith YiDifference When value is less than default eight threshold value, it is determined that (Tk, Xk, Yk) belonging to capture picture and (Ti, Xi, Yi) belonging to time location Data-Link it is complete Into vehicle match.
  6. 6. according to the method for claim 1, it is characterised in that sent out in the acquisition business subsystem in every OBU and RSU The every OBU obtained during raw ETC transaction time location data (Tj, Xj, Yj) after, methods described also includes：
    Obtain the time location data (T for capturing the vehicle obtained when subsystem is captured to predeterminable areak, Xk, Yk), wherein, TkTo capture time, XkThe abscissa of the position of vehicle or car plate for candid photograph, YkIndulge the position of vehicle or car plate for candid photograph Coordinate；
    In TkWith TjDifference be less than default 9th threshold value and XkWith XjDifference be less than default tenth threshold value and YkWith YjDifference When value is less than default 11 threshold value, it is determined that (Tk, Xk, Yk) belonging to capture picture and (Tj, Xj, Yj) belonging to OBU complete vehicle Match somebody with somebody.
  7. 7. according to the method for claim 6, it is characterised in that when the OBU is matched with capturing picture, using multiframe Preferable method is matched, often obtains OBU time location data, is just once matched the OBU with capturing picture；
    Selection and the OBU the match is successful most candid photograph pictures of number, as finally with the OBU candid photograph pictures that the match is successful.
  8. 8. according to the method for claim 6, it is characterised in that the acquisition business subsystem occurs in every OBU and RSU Time location data (the T for every OBU that ETC is obtained when merchandisingj, Xj, Yj), including：
    Using the method for multiframe Optimum Matching, acquisition business subsystem obtains every when ETC transaction occurs for an every OBU and RSU One OBU time location data；
    Select every OBU confidence level highest time location data (Tj, Xj, Yj) as with (Tk, Xk, Yk) belonging to capture picture Carry out the time location data of vehicle match.
  9. 9. according to the method for claim 1, it is characterised in that methods described also includes：
    Obtain the candid photograph picture captured and obtained when subsystem is captured to predeterminable area；
    Car license recognition is carried out to the candid photograph picture, obtains license plate recognition result；
    Obtain license board information of the business subsystem in every OBU and RSU every OBU for occurring to obtain during ETC transaction；
    Obtain the similarity of the license plate recognition result and the license board information of every OBU；
    When the similarity is less than or equal to default 12 threshold value, the candid photograph picture and its when meta that the match is successful are determined Put Data-Link and complete vehicle match with the OBU.
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