CN105678852A - Multi-lane free flow (MLFF) electronic toll collection (ETC) lane system and license plate identification method thereof - Google Patents
Multi-lane free flow (MLFF) electronic toll collection (ETC) lane system and license plate identification method thereof Download PDFInfo
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- 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
- G07B15/063—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems using wireless information transmission between the vehicle and a fixed station
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Abstract
The application relates to an ETC lane system under an MLFF scene and a license plate identification method of the system. The system comprises a road side unit , a video intelligent identification subsystem possessing a vehicle detector and a camera, and an industrial control subsystem. The industrial control subsystem combines the coordinate information of a vehicle-mounted unit reported by the road side unit and a vehicle detection triggering signal reported by the vehicle detector to judge, after the situation that a vehicle is located in a shooting area, is determined, the corresponding camera is controlled to capture and identify the image of the vehicle. According to the present invention, the camera is triggered to shoot by a method of combining the positioning information of the vehicle and the triggering signal of the vehicle detector, thereby reducing the spurious triggering situation, and improving the system efficiency. In one embodiment, by the positioning information of the vehicle, and by combining the triggering area of the vehicle detector, the camera is controlled to shoot the vehicle entering the triggering area later, thereby reducing the omissive shooting situation, and further improving the license plate identification success rate of the system.
Description
Technical field
The application relates to technical field of intelligent traffic, particularly relate to a kind of multilane and freely flow (MLFF, Multi-LaneFreeFlow) electric non-stop toll (ETC, ElectronicTollCollection) lane system and licence plate recognition method thereof.
Background technology
When vehicle is charged by the traffic infrastructure such as urban road, bridge, tunnel, if the fairness of card charge method is better, but have that efficiency is low, impact is passed through, block up, the defect such as contaminate environment; Although and annual ticket charge method efficiency is higher, but lacking fairness because vehicle walk more few walk, the payment walking or do not walk the same. So usually adopting now the mode charged in due order under scene, it can solve charge efficiency and fair problem simultaneously. And MLFF electronic charging system without parking refers to, track isolation facility is not had at toll station, toll facility is erected on the portalframe above track, with the board units (OBU installed on the vehicle that misses the stop, OnBoardUnit, also known as electronic tag) by the mode of radio communication complete charge transaction, vehicle can according to the normal speed of a motor vehicle in any way (comprise by track, standdle carrier road and become track) pass through toll station.
In MLFF system, it is desired to OBU location, coordinate vehicle cab recognition and video capture system, jointly complete vehicle auditing and capture violation vehicle car plate etc. Specifically, it usually needs transaction record, vehicle locating information, vehicle image and license plate recognition result are uploaded to track computer, and the information these uploaded by track computer is comprehensively analyzed, complete car transaction record excessively is formed with foundation as a result. Such as, also automatically generate serial number (it should be identical with transaction serial number) while capturing image, if track computer judges that capturing image serial number mates with transaction serial number, automatically preservation is proceeded to, image that can not be corresponding with transaction serial number, then it is judged to violation vehicle, as the foundation that expense is demanded.
In the Car license recognition of ETC system, the ETC system run at present adopts laser triggering candid photograph to carry out Car license recognition more mostly, or carries out Car license recognition by the video flowing of camera. These schemes come with some shortcomings part. Capturing adopting laser triggering carries out in the scheme of Car license recognition again, and the optical signal sent due to laser is easily subject to the impact of environmental factors, and when encountering the weather such as dense fog, heavy snow, heavy rain, or time Air quality is not good, the function of equipment will be had a greatly reduced quality. Because in inclement weather; there is a lot of particulate or the snow material such as grain, raindrop in the air; these materials being reflected after hitting laser, reflects, stop and the phenomenon such as energy absorption, these phenomenons will cause the false triggering of equipment, it is possible to cause Car license recognition to be made mistakes. And, if camera is undertaken taking pictures by false triggering and car plate is analyzed, it is possible to causing when really there being vehicle to come, previous taking pictures is carried out data processing by camera, and cause leakage to be clapped. Or, when a car does not leave in the toggle area of laser apparatus always, and when another vehicle also enters this toggle area, laser apparatus only triggers once photo taking when a front car enters, and no longer takes pictures when then a car enters, and so also causes occurring that car plate is clapped in leakage. And in the scheme adopting video flowing to carry out Car license recognition, because the data volume of process is big so that the time that camera carries out a Car license recognition is longer, there is the situation leaked because efficiency is not high and clap car plate.
Summary of the invention
The application provides a kind of false triggering camera candid photograph image that can reduce freely to flow Electronic Toll Collection for Lane System and licence plate recognition method thereof to improve the multilane of Car license recognition.
First aspect according to the application, the application provides a kind of multilane freely to flow Electronic Toll Collection for Lane System, comprises based on road side unit, the video intelligent recognition subsystem with vehicle detection device and pick up camera and the industry control subsystem being connected with described road side unit and described video intelligent recognition subsystem signal respectively that special short distance communication realizes;
Described road side unit comprises antenna, and the board units searched, by described antenna searching vehicle carrier unit in antenna coverage areas, is carried out wireless location by described road side unit, and location gained coordinate information is reported described industry control subsystem;
Described vehicle detection device is used for when vehicle residing for described board units sails vehicle detection toggle area into, produces vehicle detection triggering signal, and described vehicle detection triggering signal is uploaded described industry control subsystem;
The vehicle detection triggering signal that described industry control subsystem is used for the coordinate information that reports according to described road side unit and described vehicle detection device is uploaded, judge whether described vehicle is in the shooting area of described pick up camera, if described vehicle is in described shooting area, then described vehicle taken by the described corresponding pick up camera of industry control subsystem controls, obtains vehicle image;
Described video intelligent recognition subsystem carries out Car license recognition according to described vehicle image.
In one embodiment, the coordinate information of each new definition is uploaded described industry control subsystem by described road side unit, and described industry control subsystem forms the running orbit of described vehicle according to the coordinate information uploaded; Described industry control subsystem, while judging the shooting area whether described vehicle is in described pick up camera, determines that according to described running orbit controlling corresponding pick up camera takes.
In another embodiment, the location coordinate that described industry control subsystem is uploaded according to described road side unit, judge whether same vehicle detection toggle area exists at least two vehicles, at least two vehicles is there is if it is determined that go out in described same vehicle detection toggle area, then according to after enter the locating information of vehicle of same vehicle detection toggle area, control corresponding pick up camera and take to obtain vehicle image to the vehicle entering same vehicle detection toggle area after described.
In an embodiment again, each track in multilane is respectively provided to a few road side unit, at least one pick up camera and at least one vehicle detection device, the antenna coverage areas of the antenna of the described road side unit in adjacent two tracks is in the two mutual superpositions in critical zone, track, the shooting area of the described pick up camera in adjacent two tracks is in the two mutual superpositions in critical zone, track, and the vehicle detection toggle area of the described vehicle detection device in adjacent two tracks is in the two mutual superpositions in critical zone, track.
Further, the locating information of the same board units that described industry control subsystem reports according to the described road side unit on each track, taking the center of the antenna of each road side unit point perpendicular to the ground as true origin, calculate the coordinate of described board units, the coordinate conversion calculated is become the coordinate in same plane, coordinate in described same plane is that the point of crossing of the position set up taking track, the leftmost side or track, the rightmost side and described road side unit is as initial point, the judgement that many groups changed same planimetric coordinatess carry out valid data is to reject error-value, obtain virtual value, mean value is calculated according to virtual value, described mean value is the coordinate position of described board units.
In another embodiment, antenna cover is the longitudinal distance of the longitudinal Distance geometry vehicle identification of distance covering vehicle detection triggering longitudinally, the longitudinal distance of described antenna cover is that described antenna coverage areas is along the distance on described vehicle traveling direction, it be described vehicle detection toggle area along the distance on described vehicle traveling direction that described vehicle detection triggers longitudinally distance, and described vehicle identification is longitudinally apart from being that described shooting area is along the distance on described vehicle traveling direction.
In an embodiment again, described system also comprises remote monitoring subsystem, it is connected with described road side unit, described video intelligent recognition subsystem and described industry control subsystem signals respectively, for monitoring the running status of described road side unit, described video intelligent recognition subsystem and described industry control subsystem respectively, store the result of described road side unit, described video intelligent recognition subsystem and described industry control subsystem respectively.
Second aspect according to the application, the application provides a kind of multilane described above freely to flow the licence plate recognition method in Electronic Toll Collection for Lane System, and described method comprises the steps:
Industry control subsystem receives the locating information of the board units that road side unit reports, and also receives the vehicle detection triggering signal that vehicle detection device is uploaded;
Described industry control subsystem is according to described locating information and described vehicle detection triggering signal, judge residing for described board units, whether vehicle is in shooting area, if described vehicle is in described shooting area, then control corresponding pick up camera and take described vehicle, obtaining vehicle image, described vehicle image is used for carrying out Car license recognition for described video intelligent recognition subsystem.
In one embodiment, described method also comprises the steps:
The described locating information that described industry control subsystem reports according to described road side unit every time, forms the running orbit of described vehicle;
Described industry control subsystem, while judging the shooting area whether described vehicle is in described pick up camera, determines that according to described running orbit controlling corresponding pick up camera takes.
In another embodiment, described method also comprises the steps:
The location coordinate that described industry control subsystem is uploaded according to described road side unit, judge whether same vehicle detection toggle area exists at least two vehicles, at least two vehicles is there is if it is determined that go out in described same vehicle detection toggle area, then according to after enter the locating information of vehicle of same vehicle detection toggle area, control corresponding pick up camera and take to obtain vehicle image to the vehicle entering same vehicle detection toggle area after described.
The useful effect of the application is: the method combined by the triggering signal of the locating information of vehicle and vehicle detection device is triggered camera and takes pictures, thus can reduce the situation of false triggering, it is to increase the efficiency of system.
In one embodiment, by the locating information of vehicle, and the toggle area in conjunction with vehicle detection device, control camera to after enter toggle area vehicle take pictures, thus reduce the situation that leakage is clapped, the recognition success rate of further raising system car plate.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present application, use required during embodiment is described belowAccompanying drawingBeing briefly described, wherein same reference numerals represents same section.
Fig. 1For the multilane of the application one embodiment freely flows the road area signal of electronic charging system without parkingFigure;
Fig. 2ForFig. 1Shown road area is in the signal of same planimetric coordinatesFigure;
Fig. 3ForFig. 1Longitudinal control area signal of shown road areaFigure;
Fig. 4For the ETC of the application one embodiment freely flows charge system compositionFigure;
Fig. 5The many cars freely flowed in electronic charging system without parking for the multilane of the application one embodiment enter the situation signal in laser triggering regionFigure;
Fig. 6For the flow process signal freely flowing the car plate snapshot recognition method in Electronic Toll Collection for Lane System based on multilane of the application one embodimentFigure。
Embodiment
For overcome existing laser triggering capture go forward side by side driving board identifying schemes and by video flowing carry out in Car license recognition scheme exist deficiency, the embodiment of the present application proposes the Car license recognition scheme triggered and laser triggering combines based on wireless location, it triggers camera by the mode that the triggering signal of the locating information of vehicle and laser apparatus combines and takes pictures, false triggering is reduced with this, system resource is reasonably utilized, thus improves the efficiency of system; And when many cars are entered toggle area, trigger Car license recognition by wireless location simultaneously, thus reduce the situation that leakage is clapped, it is to increase the success ratio of Car license recognition.
Under the ETC lane system of the embodiment of the present application is applied to MLFF scene, namely road toll facility is not set on the road of vehicle pass-through, vehicle can be sentenced the state freely flowed and travel at toll station, and the facility of toll station (such as road side unit RSU) is erected on the portalframe above trackSuch as Fig. 1Shown in, and on the vehicle that misses the stop install OBU by the mode of radio communication complete charge transaction, vehicle can according to the normal speed of a motor vehicle in any way (comprise by track, standdle carrier road and become track) pass through toll station.
Owing to the antenna coverage areas of RSU is limited, the toggle area of laser apparatus also has certain limit, in order to cover whole road to realize ETC, need to lay multiple antenna and multiple laser apparatus according to road width, and identify car plate to capture better, it is generally a track and lays a laser apparatus, the transmitting antenna of a RSU and a pick up cameraSuch as Fig. 1Shown in.
In the MLFFETC lane system of the embodiment of the present application, in order to make ETC system not conclude the business blind area, the transverse direction of the antenna of RSU is (namelyFig. 1Shown in horizontal direction) the critical zone mutual superposition of region of concluding the business in adjacent two tracks; With reason, the shot region of pick up camera and the toggle area of laser apparatus be also superposition mutually in the critical zone of adjacent lane. So when vehicle is entered antenna rf region and concluded the business by OBU and antenna, it is possible to the multiple stage antenna on different track can both receive the data that same OBU returns. Based on this, the MLFFETC lane system of the embodiment of the present application provides a kind of method of accurate location OBU. Specifically, data according to the same OBU that each antenna receives, calculate the coordinate (method of calculation can realize) of this OBU with reference to existing correlation technique, the coordinate now calculated is all taking each center of antenna point perpendicular to the ground as initial point, then, utilize plane geometry knowledge, the coordinate conversion calculated become the coordinate in same plane, such as with Far Left track (Fig. 1Shown in track 1) be initial point with the point of crossing of portalframe,Such as Fig. 2Shown in, effectively judge by many groups changed same planimetric coordinatess are carried out data, get rid of error-value, then calculate mean value according to all virtual values, such that it is able to accurately calculate the position of label.
In addition, in order to make RSU and OBU have the enough transaction time, DSRC longitudinal direction (Fig. 1The vehicle movement direction that shown arrow characterizes,Fig. 2Vehicle movement direction) control area needs long because the coordinate information of sky line computation vehicle and complete transaction and need the regular hour, so the zero position in Car license recognition region is less than the zero position in transaction region; And, during in order to make laser apparatus be triggered, vehicle is in shot region, so the zero position of the longitudinal region triggered to be slightly less than the zero position of shot region,Such as Fig. 3Shown in.
Combine below by embodimentAccompanying drawingThe application is described in further detail.
In the application one embodiment, whole multilane freely flows the system composition of ETC charge systemSuch as Fig. 4Shown in, it mainly includes industry control subsystem, special short distance communication (DSRC, DedicatedShortRangeCommunications) subsystem, video intelligent recognition subsystem, in another embodiment, this system can also comprise remote monitoring subsystem. Obviously, it is that the OBU that will be contained in DSRC subsystem partly removes that multilane freely flows ETC the lane in which the drivers should pay fees system, for convenience of describing, lane system combines the OBU being installed on vehicle here, forms whole multilane and freely flows ETC charge system.
Multilane freely flows the charge working process of system of ETC: when being provided with the control area of vehicle through ETC system of OBU, the OBU in RSU and car completes information interaction after safety certification, formation transaction record; And roadside device completes the location of vehicle; Laser apparatus triggering vehicle image candid photograph equipment in video intelligent recognition subsystem is captured simultaneously, identifies the number-plate number; Then, transaction record, vehicle locating information, vehicle image and license plate recognition result are uploaded to industry control subsystem. Information is carried out comprehensive matching by industry control subsystem, according to matching result, forms complete car transaction record foundation as a result excessively, or carries out artificial illegal vehicle payment and force law enforcement.
The equipment that industry control subsystem generally includes is industrial computer (also claiming driveway controller, track computer), industry router, industrial switch and 3G module etc., in order to realize the functions such as transaction record storage, vehicle/car plate picture-storage, camera/laser apparatus communication interface, DSRC subsystem communication interface, remote monitoring channel interface, inspection coupling automatically and track logic control.
DSRC subsystem realizes based on dedicated short-range communication, generally includes the equipment such as OBU, RSU array, deducts fees the functions such as flow process, transaction record are uploaded, wireless location in order to realize congestion-pricing. RSU can comprise the parts such as antenna controller, read-write antenna, positioning antenna. These parts can all be arranged on portalframe, it is also possible to antenna controller is separated setting with antenna, and such as antenna controller is arranged on roadside, and read-write antenna and positioning antenna are erected on portalframe. Antenna controller can be made up of the industrial computer of industry control subsystem in the present embodiment, in another realization, it is possible to adopts embedded technology that antenna controller function is embedded into antenna itself. DSRC subsystem can realize the communication between road, car, completes the data exchange charged and conclude the business, also possesses the accurate positioning function to OBU, as previously indicated simultaneously. In addition, again in a realization, by the communication of RSU and OBU, RSU can obtain its type of vehicle information stored from OBU.
The major equipment of video intelligent recognition subsystem relates to pick up camera, mends light lamp and vehicle detection device (such as adopting laser, echelette grating etc. to carry out vehicle), and the function of specific implementation comprises track following, Car license recognition, vehicle pictures candid photograph and vehicle cab recognition etc. In the present embodiment, the function unit of this subsystem can be the industrial computer formation of industry control subsystem, in another realization, it is possible to adopt embedded technology that corresponding controlling functions is embedded into vehicle detection device and/or camera itself.
In a kind of realization, vehicle detection device adopts scanning type laser sensor. First laser signal ceaselessly launched continuously by laser apparatus to ground, and the laser signal returned in ground or vehicle reflection is sent into relevant function unit and processes, when there is no the toggle area that vehicle enters laser apparatus, the laser signal that reflection is returned is all by land return, and when having the toggle area that vehicle enters laser apparatus, in this for some time that vehicle front enters, rear end is left, land return is different with the energy of the laser signal that vehicle reflects, by analyzing the energy variation of laser signal, it may be determined that go out and have vehicle to sail toggle area into. Laser apparatus can produce laser trigger signal accordingly, and reports industry control subsystem. In another realization, if having vehicle by laser triggering region, in this for some time that vehicle front enters, rear end is left, according to the laser signal that reflection is returned, be converted into photoelectricity signal and carry out the process such as filtering, amplification, analog to digital conversion, carry out energy spectrum analysis by the information of frequency domain, it is possible to calculate vehicle length, highly, width coordinate, thus draw the appearance profile of vehicle, and can thus automatically identify type of vehicle.
For pick up camera, it mainly carries out the operation such as video capture and Car license recognition, and relevant function unit can be made up of the industrial computer of industry control subsystem, it is also possible to adopts embedded technology will capture controlling functions and embeds pick up camera such as high-definition camera itself. For realizing Car license recognition, pick up camera or its function unit can be provided with image procossing software and character recognition software.
The location coordinate information (i.e. vehicle position information) that industry control subsystem reports according to DSRC subsystem, and the laser trigger signal that laser apparatus is uploaded, judging whether the shooting area of pick up camera exists vehicle, if existed, control pick up camera carries out video capture. Capture the image obtained after image procossing and character recognition, it is possible to obtain the information such as car plate color, number.
Remote monitoring subsystem can be the server adopted in existing correlation technique, it is possible to for monitor by the equipment running status of above each subsystem, the information of various result stores, big data analysis, artificial inspection is than reciprocity.In one implementation, the driveway controller of industry control subsystem is responsible for the input information that collection processes above-mentioned correlation subsystem, and to complete on-the-spot charge transaction process, transaction results is transferred to remote monitoring subsystem by network, or hind computation machine charge system.
In another embodiment, it adopts the mode of vehicle operating track to carry out the candid photograph control of Car license recognition. Specifically, at vehicle to, in portalframe driving process, DSRC subsystem can send industry control subsystem to the coordinate information of each new definition, industry control subsystem forms the running orbit of vehicle according to the coordinate information uploaded. When vehicle enters the toggle area of laser apparatus, laser apparatus uploads triggering signal to industry control subsystem, whether industry control subsystem uploads triggering signal according to the ordinate zou of the location coordinate information uploaded and laser apparatus judges whether shot region exists vehicle, and the running orbit mark that combined with positioning information is formed simultaneously determines by which camera to take pictures. When vehicle is positioned at mid-way, track, then only this track laser apparatus is triggered, and industry control subsystem is according to locating information, is taken pictures by the camera only controlling this track. When track travels across road, although the laser apparatus in adjacent two tracks all can be triggered, but industry control subsystem can determine according to the running orbit of vehicle to need several cameras to take pictures. It can be appreciated that the judgement across road can be the X-coordinate according to location coordinate judges the horizontal particular location of vehicle at whole road section, in conjunction with the width in Mei Tiao road, can judge that whether vehicle is across road. Here there is following situation:
1), vehicle is straight when travelling across road, and the ratio in two tracks occupied by vehicle body determines to take pictures by the camera on which track, if a greater part of vehicle body falls into track B, then the camera controlled above the B of track on portalframe is captured. 2), vehicle is when being inclined cross, according to headstock towards, determine that the camera in that track is taken pictures. For headstock towards judgement, it can be: according in vehicle movement process, antenna constantly can pass to industry control subsystem locating information, such industry control subsystem just can depict the running orbit of vehicle according to the coordinate information of difference, thus can judge that headstock is honest traveling, or tiltedly travel to the left or to the right.
The method combined by locating information and laser trigger signal, it is possible to effectively prevent camera by the situation of false triggering. In addition, when vehicle travels across road, determine that the camera in which bar road is taken pictures according to the running orbit of vehicle, thus improve the efficiency of system Car license recognition.
In an embodiment again, when vehicle A enters the toggle area of laser apparatus, laser apparatus can upload a triggering signal to industry control subsystem, and when vehicle A does not also leave the toggle area of laser apparatus, now vehicle B also enters the toggle area of laser apparatus, owing to vehicle A does not also leave the toggle area of laser apparatus, in traditional technical scheme, laser apparatus in order to prevent false triggering, when vehicle B enters toggle area again, laser apparatus can not produce triggering signal, scene againSuch as Fig. 5Shown in. Like this, just there is the situation causing and Lou clapping vehicle B. And in the embodiment of the present application, in this case, industry control subsystem according to the known vehicle A of the running orbit information of vehicle A also in the toggle area of laser apparatus, when vehicle B sails the toggle area of laser apparatus again into, although laser apparatus does not produce triggering signal, but industrial computer is according to the locating information of vehicle B, triggers camera and take pictures.Effective like this vehicle B is prevented to be leaked the situation of bat. Thus improve the Car license recognition success ratio of system.
Known based on above embodiment, the multilane that the embodiment of the present application proposes freely flows Electronic Toll Collection for Lane System and combines based on the triggering of wireless location information and vehicle detection device, control video capture and Car license recognition, thus solve and freely flow laser apparatus false triggering problem existing when surrounding environment is severe in ETC charge system existing and solve the leakage bat phenomenon carrying out Car license recognition based on video flowing, the embodiment of the present application can reduce the number of times of false triggering, it is to increase the success ratio of identification; When many cars enter toggle area simultaneously, triggered candid photograph and the identification of license plate image by wireless location, thus reduce the situation that leakage is clapped.
Correspondingly, the embodiment of the present application also proposes a kind of car plate snapshot recognition method freely flowing in Electronic Toll Collection for Lane System based on multilane. In the method,Such as Fig. 6Shown in, the vehicle detection triggering signal that the coordinate information of the board units that industry control subsystem reports in conjunction with road side unit and vehicle detection device are uploaded judges, after determining that vehicle is in shooting area, control video capture and identification that corresponding pick up camera carries out vehicle.
In an embodiment of the present invention, Electronic Toll Collection for Lane System is freely flowed by applying above-mentioned multilane, it is possible to realizing charge and car plate candid photograph identification that multilane freely flows electronic non-parking, its methods involving flow process is described below:
RSU is by the downgoing signal of antenna (such as read-write antenna) to antenna coverage areas emit periodic, if entered, the vehicle of antenna coverage areas is provided with OBU, then OBU is waken up by downgoing signal, RSU and OBU communicates, and pass through the upward signal that antenna (such as positioning antenna) receives OBU and returns, the legitimacy of OBU is verified by RSU, if OBU is legal OBU, then read-write antenna continues to carry out with OBU having communicated charge transaction. No matter whether OBU is legal, positioning antenna all detects the intensity of the upward signal that OBU returns, RSU is according to this uplink signal strength, orienting OBU position, transaction results of then charging, OBU locate gained coordinate information (such as comprising position and setting time) etc. and report industry control subsystem.
While RSU and OBU communicates, whether the detection of vehicle detection device has vehicle to enter its toggle area, toggle area is entered when there being vehicle, vehicle detection device generates vehicle detection triggering signal, this signal can carry the information such as vehicle location, triggering time, and this vehicle detection triggering signal is uploaded industry control subsystem. In one implementation, vehicle detection device can also detect out vehicle profile, with determine type of vehicle (such as large-scale car, medium-sized car, compact car) and type of vehicle information is uploaded industry control subsystem. Certain type of vehicle can also be by, in RSU and OBU communication process, RSU reads type of vehicle from the OBU storing type of vehicle information, and type of vehicle is uploaded industry control subsystem.
The relevant way that industry control subsystem relates to according to embodiment as previously is (such as in conjunction with locating information and the vehicle detection triggering signal of RSU, or in conjunction with the vehicle driving trace generated according to RSU locating information and vehicle detection triggering signal, etc.), triggering video capture vehicle image and control video intelligent recognition subsystem and the image captured is carried out Car license recognition, video intelligent recognition subsystem is by license plate recognition result and corresponding candid photograph image uploading industry control subsystem.
Vehicle locating information that RSU is uploaded by industry control subsystem and the information of vehicles (comprising the number-plate number, vehicle etc.) that RSU reads from OBU and the license plate recognition result that video intelligent recognition subsystem is uploaded, candid photograph time and capture image, judge whether the number-plate number of the two mates, if coupling, then generate the car record excessively having transaction information and the information of candid photograph, if do not mated, it is possible to the information uploaded is transferred to remote monitoring subsystem and carries out subsequent disposal.
Under the MLFF scene that the embodiment of the present application proposes, ETC system can be applicable to such as urban congestion charge, city toll on the road and bridge etc. The scheme proposed by the embodiment of the present application can reduce the situation of system false triggering, reduces the situation that leakage is clapped, thus improves the success ratio of Car license recognition.
It will be appreciated by those skilled in the art that, in above-mentioned enforcement mode, all or part of step of various method can be carried out instruction related hardware by program and completes, this program can be stored in a computer-readable recording medium, and storage media can comprise: read-only storage, random access memory, disk or CD etc.
Above content is further description the application done in conjunction with concrete enforcement mode, can not assert that the concrete enforcement of the application is confined to these explanations. For the application person of an ordinary skill in the technical field, under the prerequisite not departing from the application's design, it is also possible to make some simple deduction or replace.
Claims (10)
1. a multilane freely flows Electronic Toll Collection for Lane System, it is characterized in that, comprise based on road side unit, the video intelligent recognition subsystem with vehicle detection device and pick up camera and the industry control subsystem being connected with described road side unit and described video intelligent recognition subsystem signal respectively that special short distance communication realizes;
Described road side unit comprises antenna, and the board units searched, by described antenna searching vehicle carrier unit in antenna coverage areas, is carried out wireless location by described road side unit, and location gained coordinate information is reported described industry control subsystem;
Described vehicle detection device is used for when vehicle residing for described board units sails vehicle detection toggle area into, produces vehicle detection triggering signal, and described vehicle detection triggering signal is uploaded described industry control subsystem;
The vehicle detection triggering signal that described industry control subsystem is used for the coordinate information that reports according to described road side unit and described vehicle detection device is uploaded, judge whether described vehicle is in the shooting area of described pick up camera, if described vehicle is in described shooting area, then described vehicle taken by the described corresponding pick up camera of industry control subsystem controls, obtains vehicle image;
Described video intelligent recognition subsystem carries out Car license recognition according to described vehicle image.
2. the system as claimed in claim 1, it is characterised in that, the coordinate information of each new definition is uploaded described industry control subsystem by described road side unit, and described industry control subsystem forms the running orbit of described vehicle according to the coordinate information uploaded; Described industry control subsystem, while judging the shooting area whether described vehicle is in described pick up camera, determines that according to described running orbit controlling corresponding pick up camera takes.
3. the system as claimed in claim 1, it is characterized in that, the location coordinate that described industry control subsystem is uploaded according to described road side unit, judge whether same vehicle detection toggle area exists at least two vehicles, at least two vehicles is there is if it is determined that go out in described same vehicle detection toggle area, then according to after enter the locating information of vehicle of same vehicle detection toggle area, control corresponding pick up camera and take to obtain vehicle image to the vehicle entering same vehicle detection toggle area after described.
4. the system as claimed in claim 1, it is characterized in that, each track in multilane is respectively provided to a few road side unit, at least one pick up camera and at least one vehicle detection device, the antenna coverage areas of the antenna of the described road side unit in adjacent two tracks is in the two mutual superpositions in critical zone, track, the shooting area of the described pick up camera in adjacent two tracks is in the two mutual superpositions in critical zone, track, and the vehicle detection toggle area of the described vehicle detection device in adjacent two tracks is in the two mutual superpositions in critical zone, track.
5. system as claimed in claim 4, it is characterized in that, the locating information of the same board units that described industry control subsystem reports according to the described road side unit on each track, taking the center of the antenna of each road side unit point perpendicular to the ground as true origin, calculate the coordinate of described board units, the coordinate conversion calculated is become the coordinate in same plane, coordinate in described same plane is that the point of crossing of the position set up taking track, the leftmost side or track, the rightmost side and described road side unit is as initial point, the judgement that many groups changed same planimetric coordinatess carry out valid data is to reject error-value, obtain virtual value, mean value is calculated according to virtual value, described mean value is the coordinate position of described board units.
6. the system as claimed in claim 1, it is characterized in that, antenna cover is the longitudinal distance of the longitudinal Distance geometry vehicle identification of distance covering vehicle detection triggering longitudinally, the longitudinal distance of described antenna cover is that described antenna coverage areas is along the distance on described vehicle traveling direction, it be described vehicle detection toggle area along the distance on described vehicle traveling direction that described vehicle detection triggers longitudinally distance, and described vehicle identification is longitudinally apart from being that described shooting area is along the distance on described vehicle traveling direction.
7. the system as claimed in claim 1, it is characterized in that, also comprise remote monitoring subsystem, it is connected with described road side unit, described video intelligent recognition subsystem and described industry control subsystem signals respectively, for monitoring the running status of described road side unit, described video intelligent recognition subsystem and described industry control subsystem respectively, store the result of described road side unit, described video intelligent recognition subsystem and described industry control subsystem respectively.
8. multilane as described in item as arbitrary in claim 1-7 freely flows the licence plate recognition method in Electronic Toll Collection for Lane System, and described method comprises the steps:
Industry control subsystem receives the locating information of the board units that road side unit reports, and also receives the vehicle detection triggering signal that vehicle detection device is uploaded;
Described industry control subsystem is according to described locating information and described vehicle detection triggering signal, judge residing for described board units, whether vehicle is in shooting area, if described vehicle is in described shooting area, then control corresponding pick up camera and take described vehicle, obtaining vehicle image, described vehicle image is used for carrying out Car license recognition for described video intelligent recognition subsystem.
9. method as claimed in claim 8, it is characterised in that, described method also comprises the steps:
The described locating information that described industry control subsystem reports according to described road side unit every time, forms the running orbit of described vehicle;
Described industry control subsystem, while judging the shooting area whether described vehicle is in described pick up camera, determines that according to described running orbit controlling corresponding pick up camera takes.
10. method as claimed in claim 8, it is characterised in that, described method also comprises the steps:
The location coordinate that described industry control subsystem is uploaded according to described road side unit, judge whether same vehicle detection toggle area exists at least two vehicles, at least two vehicles is there is if it is determined that go out in described same vehicle detection toggle area, then according to after enter the locating information of vehicle of same vehicle detection toggle area, control corresponding pick up camera and take to obtain vehicle image to the vehicle entering same vehicle detection toggle area after described.
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