CN102024330A - Intelligent traffic signal control system, method and equipment based on high-definition video technology - Google Patents

Intelligent traffic signal control system, method and equipment based on high-definition video technology Download PDF

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CN102024330A
CN102024330A CN2010105186136A CN201010518613A CN102024330A CN 102024330 A CN102024330 A CN 102024330A CN 2010105186136 A CN2010105186136 A CN 2010105186136A CN 201010518613 A CN201010518613 A CN 201010518613A CN 102024330 A CN102024330 A CN 102024330A
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information
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隋亚刚
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Abstract

The invention discloses an intelligent traffic signal control system based on a high-definition video technology, which comprises external station equipment, a communication network and central system equipment, wherein the external station equipment uses each intersection as a unit, and all directions of each intersection are respectively provided with high-definition cameras; the cameras are connected with a high-definition video detecting host machine and installed in a signal case; a signal lamp is connected into a traffic signal control machine; network equipment in an intersection signal machine is intercommunicated and interconnected with the central system; the communication network comprises three parts, namely the network connection from the intersection signal machine to a signal control communication unit, a communication unit and the internal network connection of the central system equipment; and the central system equipment is divided into traffic signal control system equipment, traffic violation processing system equipment, traffic video monitoring system equipment and an operating terminal according to the function. By utilizing the high-definition video technology, the intelligent traffic signal control system can realize the detection of dynamic traffic flow data, traffic data acquisition and traffic enforcement function.

Description

Intelligent traffic signal control system, method and apparatus based on the HD video technology
Technical field
The present invention relates to road traffic signal control field and HD video detection range.
Background technology
Along with China's steady development of economy, urban highway traffic is in state of saturation substantially, and environmental pollution, the city running efficiency of congestion in road and initiation therefrom is low, traffic hazard etc. become the bottleneck of restriction urban economy development and social development.As the effective means that solves the urban traffic blocking problem, the intelligent traffic signal control system has been introduced in the numerous domestic city, and Britain SCOOT system, Australian SCATS system, American ACT RA system, Spain SANCO system, HSC system of Hisense etc. are typically arranged.Existing traffic signal control system all adopts inductive coil as wagon detector, and deficiency such as coil vehicle detector ubiquity cracky, maintenance cost height, measurement data be limited.Traditional inductive coil of comparing, the HD video detection technique has been expanded the acquisition capability of real-time dynamic traffic data greatly, this technology mainly is to utilize the virtual coil be installed on the track to trigger the HD video video camera record of making a video recording, for the lifting of traffic signal control system control ability provides condition, the present invention attempts adopting the HD video video camera to improve system's control ability for traffic signal control system provides the dynamic traffic data.
Current, high-definition electronic police device and traffic video monitoring system have all been installed in numerous cities in all parts of the country.Wherein, traffic administration functions such as the candid photograph though high-definition electronic police device can be realized making a dash across the red light, overspeed snapping, the candid photograph of driving in the wrong direction can't realize the detection of dynamic traffic flow data; And the ordinary traffic video monitoring system also can't be finished traffic data and obtains and the traffic administration function.
Summary of the invention
The objective of the invention is to utilize at crossing installation HD video and detect video camera, use same video equipment to realize that comprehensive traffic detects, with the traffic monitoring video flowing be sent to traffic guidance system, with traffic flow detect data input to whistle control system, with the traffic administration data transmission to the traffic enforcement system, finally build intelligent traffic whistle control system based on HD video.To solve in the prior art, can't realize the detection of dynamic traffic flow data, and the ordinary traffic video monitoring system also can't be finished traffic data and obtains and the traffic administration function.
For addressing the above problem, the invention discloses a kind of intelligent traffic signal control system general structure, comprise outer station equipment, communication network and centring system equipment three parts, wherein:
Outer station equipment is a unit with single crossing, each crossing all directions is installed high-definition camera respectively, video camera links to each other with HD video detection main frame and is installed in the signal cabinet, and signal lamp inserts traffic signal controlling machine, by the network equipment in the intersection annunciator and centring system interconnection;
Communication network comprises three parts, and promptly intersection annunciator connects to the network of signal controlling communication unit, communication unit, and the internal network of centring system equipment connects.Wherein, the communication unit of traffic signal control system adopts special-purpose communication apparatus; Traffic offence disposal system and video monitoring system adopt the integrated communication access device;
Centring system equipment is divided into four big classes according to function: traffic signal control system equipment, traffic offence disposal system equipment, traffic video monitoring system equipment and operating terminal etc.
Preferably, traffic signal control system is connected the crossing signal controlling machine by network with signal system, and by this a plurality of system implementation signal monitorings and control.
Preferably, the traffic offence disposal system is gathered the illegal recorded information from the HD video detection system, and illegal information is classified, stores, handled.
Preferably, traffic video monitoring system receives the video stream data from the HD video detection system, and video information is stored, transmitted; And video-on-demand service is provided, for point duty facilitates.
Preferably, operating terminal, the point duty managerial personnel carry out manual intervention and command scheduling by operating terminal to system.
The invention also discloses a kind of system software structure, comprise user's operation layer, center control and data analysis layer, three aspect of communications layer, wherein:
The system architecture that software systems adopt C/S (client/server) to combine with B/S (browser/server) pattern, constitute with client, server and Control on Communication three big module groups, can realize monitoring the comprehensive platform of intelligent comprehensive traffic administration according to the different application demand from basic traffic control system.
The invention also discloses a kind of hardware device of intelligent traffic signal control system, comprise the HD video overall checkout equipment, it is characterized in that the HD video overall checkout equipment is made up of monitoring main frame, high-definition camera and camera lens, light filling lamp, red signal acquisition module, energy supply control module, switching value I/O module, web-transporting device etc.
Preferably, the monitoring main frame adopts the high-performance industrial computer.
Preferably, monitoring host computer using I/O module is gathered the red signal data, simultaneously by access to netwoks HD video and video recording in real time, utilize the motion state of high performance video detection technology and car plate recognizer inspection vehicle, adopt the illegal activities and the current record of prior art comprehensive detection vehicle then.Then with detected vehicle pass-through information and illegal information, video information is stored in this locality, when communicating with central site network, illegal record and vehicle pass-through record are uploaded to the corresponding server in center, if the bandwidth of network is enough, real-time video record can be uploaded to the center video server.Also can call the video record and the real-time video at crossing at the center.
The invention also discloses a kind of traffic signal control method, utilize HD video to obtain flow, occupation rate and average velocity, obtain license board information accurately in real time based on the HD video traffic data.
Compared with prior art, the present invention can realize following function:
1, the monitoring function that makes a dash across the red light: by high-definition image being carried out area dividing defining virtual video detector, utilize image background analysis-by-synthesis technology to realize that automobile storage is at basic measuring ability such as detection, vehicle heading detection, adopt three 5,000,000 pixel high definition photo record vehicles running red light information, meet " GA/T496-2009 red-lamp running automatic recording system general conditions " requirement, three clear reflection red signals of the equal cocoa of photo, type of vehicle, body color, roadmarking, and all with the photo opporunity of every photo of time keeping of being accurate to millisecond.Simultaneously, generate automatically: information such as record number, device numbering, red light start time, red light concluding time, the number-plate number, car plate color, vehicle classification.
2, other illegal monitoring functions: adopt virtual coil to detect, the algorithm that moving body track technology and car plate recognizer combine is finished traffic offence and is detected, comprise take that bicycle lane travels, drives in the wrong direction, illegal parking, lanes etc. in accordance with regulations not, to the automatic record of commit unlawful acts system of institute: record number, device numbering, incident start time, thing concluding time, event type, detection site, detection side to.
3, vehicle pass-through information writing function: carry out vehicle detection by virtual detector is set on every track, after finding car plate, take pictures and trigger the car plate recognition function, confirm to find behind the car plate photo and relevant information to be synthesized, and carry out photo storage.Image resolution ratio is that per car road horizontal resolution can reach more than 800 under 2592 * 1936, the three track monitoring situations simultaneously, can clear record license board information, and can accurately discern car plate.Vehicle pass-through information photo form is that two photos are synthetic, prints additional the temporal information, the location information that are accurate to millisecond.
4, number plate recognition function: license plate recognition result comprises brand number, number plate color, type of vehicle, car plate positional information.The license plate recognition technology index meets GA/T 833-2009 " automotive number plate image automatic identification technology standard ", daytime the number plate recognition accuracy more than or equal to 90%, night, the number plate recognition accuracy was more than or equal to 80%.
5, traffic flow measuring ability: carry out analyzing and processing by the detected state to all Virtual Monitoring zones, form the traffic flow testing result, whenever current direction can be provided with 16 detecting devices at most, and testing result can be exported by the multiple interfaces mode.The traffic flow testing result comprises that automobile storage is in information, flow information, occupation rate information.Wherein the measurement period of flow, occupation rate information can be provided with by configuration software, and the minimum period in cycle is 1 second, and maximum cycle is 1 hour.System's traffic flow testing result can be preserved in this locality, and maximum storage time is 1 year.
6, video flowing acquisition function: HD video information is carried out video flowing collection and record, video flowing adopts H264 coded system real-time Transmission to the center traffic video monitoring system, adopt the automatic store video stream information of AVI form, monofile (2 minutes) volume is less than 60M, system is the storage space that video information is reserved 1.5T, the single channel video storage time can reach 30 days, and system's design maximum Video processing ability is 4 the tunnel, and 4 road HD video video times were greater than 7 days under the full load situation.All video files all can be play by Windows Media player, and file number adds the name of start-of-record time with video channel, the video recording of 2 minutes HD video of every single file logging.
7, local storage function: the built-in 2TB hard disk of monitoring main frame, be used for local datastore, can provide 1 month (containing whole recorded informations and illegal photo) make a dash across the red light and other unlawful data, 3 days video records and 1 month (containing whole recorded informations and photo) the vehicle pass-through record.
8, telemanagement and operational monitoring function: can monitor to ruuning situation in real time that the monitoring content comprises information such as video fault, car plate identification fault, cpu system loading condition, internal memory operating position, hard disk operating position.
Description of drawings
Fig. 1 is a kind of structural representation of intelligent traffic signal control system structure of the present invention;
Fig. 2 is the structural representation of intelligent traffic signal control system software configuration;
Fig. 3 is the synoptic diagram of system hardware pie graph;
Fig. 4 is the system software process flow diagram;
Fig. 5 is vehicle agglomerate testing process figure;
Fig. 6 is intelligent traffic signal control block diagram representation;
Fig. 7 obtains signal hourage for the upstream and downstream crossing;
Fig. 8 is a signal controlling subarea Dynamic OD synoptic diagram;
Fig. 9 is information of vehicles list structure figure.
Embodiment
Below in conjunction with accompanying drawing, specify the present invention.
With reference to figure 1, show a kind of structural representation of intelligent traffic signal control system structure of the present invention.It comprises outer station equipment, communication network and centring system equipment three parts.
Outer station equipment is a unit with single crossing, each crossing all directions is installed high-definition camera respectively, video camera links to each other with HD video detection main frame and is installed in the signal cabinet, and signal lamp inserts traffic signal controlling machine, by the network equipment in the intersection annunciator and centring system interconnection;
Centring system comprises traffic signal control system, traffic offence disposal system, traffic video monitoring system and operating terminal; Traffic signal control system is made up of a plurality of signal system servers, can comprise existing urban traffic signal control system, can implement the system of networked traffic signals control as SCOOT system, SCATS system, ACTRA system or other.
Communication network comprises three parts, the internal network that is the intersection annunciator network connection of arriving the signal controlling communication unit, communication unit, centring system equipment connects, wherein, the communication unit of described traffic signal control system adopts special-purpose communication apparatus, and traffic offence disposal system and video monitoring system adopt the integrated communication access device.
With reference to figure 2, show system software structure synoptic diagram of the present invention.It comprises user's operation layer, center control and data analysis layer, three aspect of communications layer, the system architecture that software systems adopt C/S (client/server) to combine with B/S (browser/server) pattern constitutes with client, server and Control on Communication three big module groups.
User's operation layer, the user operates client according to service needed by traffic administration, as signal controlling, data analysis inquiry, traffic offence statistics, equipment control etc.
Center control and data analysis layer comprise the storage and the processing of real time traffic data, are made of a plurality of servers and database.At first, will not be stored to database from the data qualification of crossing; Obtain information needed separately by each functional module by the data of database operation then, and the result is fed back to user's operation layer, is stored to database.Modular division is adopted in the selection of functional module, and different cities can make up as required.
The communication transport layer, the real-time Data Transmission of realization centring system and field apparatus.On the one hand, the data upload that traffic flow data, signal controller state, the HD video comprehensive monitoring equipment of crossing is collected is to the center; On the other hand, will be handed down to signal controller and HD video comprehensive monitoring equipment from the operational order of centring system.
With reference to figure 3, show system hardware pie graph of the present invention.It comprises the HD video overall checkout equipment, and the HD video overall checkout equipment is made up of monitoring main frame, high-definition camera and camera lens, light filling lamp, red signal acquisition module, energy supply control module, switching value I/O module, web-transporting device.
The monitoring main frame adopts the high-performance industrial computer, high-definition camera adopts 5,000,000 video pixel streams, whole hardware device is based on network service, and each is installed on TCP/IP, the File Transfer Protocol of the Ethernet interface communication support main flow at crossing, can realize the network interconnection easily.
Monitoring host computer using I/O module is gathered the red signal data, simultaneously by access to netwoks HD video and video recording in real time, utilize the motion state of high performance video detection technology and car plate recognizer inspection vehicle, then according to the illegal activities and the current record of traffic direction, angle, area and the license board information comprehensive detection vehicle of vehicle.Then with detected vehicle pass-through information and illegal information, video information is stored in this locality, when communicating with central site network, illegal record and vehicle pass-through record are uploaded to the corresponding server in center, if the bandwidth of network is enough, real-time video record can be uploaded to the center video server.Also can call the video record and the real-time video at crossing at the center.
With reference to figure 4, show system software flow process of the present invention.
With reference to figure 5, show vehicle agglomerate testing process figure of the present invention, it may further comprise the steps:
1) imports a two field picture: finish by means of the motion target tracking algorithm among the Open CV vehicle is handled and followed the tracks of.The vehicle tracking algorithm is divided into the foreground detection module, new agglomerate detection module, agglomerate tracking module, track generation module and track post-processing module, by trace flow module (CvBlobTrackerAuto) these five modules are coupled together at last, output agglomerate (ID: identifier, Pos: position, Size: size)
2) judge this agglomerate whether in the track, (x, y), the track rectangle is upper left angle point First (f as if agglomerate center position P x, f y), the bottom right angle point is Second (s x, s y), if judgement can be according to f x<x<s xAnd f y<y<s y, (x is y) in the rectangle track so just to think a P.
3) if whether vehicle in the track, is just judged this car exists in the information of vehicles tabulation,, so only need point of addition just passable if exist; If there is no, need newly-increased ID so, the vehicle count device in the track adds 1 simultaneously, and adds corresponding information.Wherein the structure of information list as shown in Figure 9.
4) in order to realize the divided lane statistical vehicle flowrate, lane occupancy ratio calculates the speed of a motor vehicle, adopts different statistical methods:
Flow: according to the ID of the agglomerate of treatment of picture output, the position, information such as size judge whether it passes through the track (area-of-interest) that we set, thereby carry out the divided lane vehicle flowrate, and for lane occupancy ratio PV, obtain video frame number nFrame according to us and can calculate PV=T*25/nFrame/second easily with the vehicle flowrate T that counts on;
The speed of a motor vehicle: we mainly are according to judging that the time t that vehicle turnover track (area-of-interest) is used and the length l pix in track carry out measuring on the figure for the mensuration of the speed of a motor vehicle, i.e. v=l/t;
Drive in the wrong direction: the location point according to the vehicle that collects is judged, at first judges the direction of traffic flow, has judged that doing poor method with position coordinates after the direction of traffic flow judges whether vehicle is retrograde;
5) according to judging whether vehicle walks out the visual field, use the positional information in the vehicle information list, draw out the track of vehicle process;
6) information of corresponding lane information correlativitys such as (as car Taoist monastic name, the speed of a motor vehicle, lane occupancy ratio, vehicle flowrates) is write realization demonstration on the picture;
7) read a two field picture again and continue to carry out above operation.
With reference to figure 6, show a kind of block diagram of putting the intelligent traffic signal control method of control, it may further comprise the steps:
(1), according to the crossing historical traffic flows canalization is carried out at the crossing, and phase place, stage and clearance order are set according to the crossing traffic engineering design;
(2) utilize the high-definition camera of video detection system, obtain traffic flow data, occupation rate data, average velocity data by virtual coil;
(3) determine the traffic control mode according to the crossing traffic situation:
When the crossing average staturation less than 50% the time, adopt induction VA control model: for each phase place is determined minimum green time T Min, maximum clearance time T MaxWith stepping time T Step, when the green time T of minimum MinDetect automobile storage as if video detector during end and then increased stepping time T StepUntil maximum clearance time T Max, otherwise change new phase place.
When the crossing average staturation greater than 80% the time, adopt multi-period fixed cycle control model: determine the clearance period plannings according to different period crossing all directions flows are different, can be with dividing time-steps usually morning peak time, the morning flat peak time, noon slack hours, afternoon flat peak time, evening peak time, night flat peak time and night slack hours;
When the crossing average staturation greater than 50% less than 80% the time, adopt time in stage adaptive control scheme, promptly phase place, stage and phase sequence are constant, but need longly according to time traffic conditions adjusting stage and cycle, optimization in per 5 minutes is once.Optimization method is as follows:
max . S ( k + 1 ) = Σ i S i ( k ) × t i ( k + 1 ) T ( k + 1 ) = Σ i F i ( k ) F i max × t i ( k + 1 ) T ( k + 1 )
st.S i(k)<0.85
T ( k ) = Σ i t i ( k ) , t i(k+1)=t i(k)+Δt
Wherein, S i(k) be the saturation degree of direction i; F i(k) be the k flow (/ hour) of direction i constantly; F ImaxThe traffic capacity (/ hour) for direction i; t i(k) be the green time of direction i; T (k) is long for the cycle; Δ t is a step value, gets 2 seconds.
With reference to figure 7, show a kind of main line upstream and downstream crossing of detecting based on HD video and obtain synoptic diagram hourage.
The line traffic control mode of existing urban traffic signal control system is determined the phase differential between the upstream and downstream crossing in the main line according to the Floating Car enquiry data between the crossing.Different magnitude of traffic flow difference, average velocity differences constantly on the road, therefore, change in time and change the hourage between the main line crossing.Because traffic study is generally carried out in the sample times such as rush hour, flat peak times, time granularity is bigger, can not fundamentally react the phase differential that the variation of fleet's gait of march is caused on the main line and change.
Car plate identifying information by the HD video detection system in the native system can be known same vehicle concrete time between the different crossings on by main line, and be accurate to millisecond that therefore, can accurately be obtained the hourage on the main line between the different crossings.
According to this data edge, covert potential difference method is carried out main line and is coordinated when adopting based on the traffic signal control system of HD video traffic data, and concrete grammar is as follows:
(1) essential informations such as video camera ID number, crossing detecting device ID number are determined at selected main line crossing;
(2) clearance stage, phase place and phase sequence are set, and guarantee that main line crossing hold period duration is identical or doubling time is long;
(3) the continuous vehicle by the main line adjacent intersection is carried out car plate identification, license plate identification data is packed, comprise license plate number in the packing data at least, by the crossing numbering, by critical datas such as times;
(4) comparison license plate number and by crossing numbering is calculated the mistiming by the upstream and downstream adjacent intersection;
(5) be unit with 5 minutes, calculate the average hourage that vehicle passes through the upstream and downstream crossing;
(6) compared with the phase differential at current upstream and downstream crossing the average hourage at upstream and downstream crossing, if hourage error continuous 3 times greater than 10% of current phase differential, then upgrade phase differential; Otherwise get back to (2) and proceed statistical computation.
With reference to figure 8, show signal controlling subarea Dynamic OD synoptic diagram.The face prosecutor formula of existing urban traffic signal control system is by dividing the traffic signals subarea, selecting key crossing and be that benchmark carries out the subarea signal controlling with the key crossing in each subarea.Wherein, key crossing is determined with the size of indexs such as flow, saturation degree usually, there is no clear theory foundation.
Car plate identifying information by the HD video detection system in the native system can be known same vehicle concrete time between the different crossings on by main line, and be accurate to millisecond, promptly each car the path of process can both accurately be followed the tracks of.Therefore, when determining to know accurately that vehicle passes through the concrete whereabouts in this zone behind the signal face control zone, the Dynamic OD in controlled traffic signals subarea can be known on the one hand, same OD can be calculated to the routing probability in this controlled subarea simultaneously on the other hand.Based on this, can utilize Jie of complex network to count theory and determine this regional key crossing.
Typical, the open complex gigantic system that urban transportation system itself is made up of roadnet, flow system and management system, urban traffic network can be mapped as complicated weighting network, that is: intersection or sub-district can be corresponding to nodes, street or road be corresponding to the limit, the vehicle impedance that the runs into weight corresponding to the limit of travelling on the limit.Transportation network non-homogeneous topological structure has in essence determined that the significance level of each node is different in the network, selects node Jie number as node importance degree evaluation index.
It is the ratio that node accounts for all shortest path numbers in the network to the number of process node i in the shortest path that node Jie counts common definition.Use for convenient, native system is defined as the path that vehicle passes through in the signal controlling zone with " shortest path ", and improvement node Jie number is defined as follows:
Use g St, iThe expression node passes through the number of path that i is ordered, n to s and t path StHave the number of path in all paths between expression node s and the node t, then Jie's number of node i is:
C ( i ) = &Sigma; s < t g st , i / n st
Size by C (i) in the more controlled subarea can be determined key crossing.
Thus, can determine based on the traffic signal control system face control method of HD video traffic data as follows:
(1) essential informations such as video camera ID number, crossing detecting device ID number are determined in selected signal controlling subarea;
(2) the continuous vehicle by the main line adjacent intersection is carried out car plate identification, license plate identification data is packed, comprise license plate number in the packing data at least, by the crossing numbering, by critical datas such as times; Comparison license plate number and by crossing numbering is determined key crossings in the control subareas according to formula 2;
(3) clearance stage, phase place and the phase sequence of key crossing are set, determine the basic cycle duration of this key crossing according to formula 1; And guarantee that regional crossing hold period duration is identical or doubling time is long;
(4) being controlled at 90% with the key crossing saturation degree is target, optimizes the subarea cycle duration according to formula 1, optimizes once in per 5 minutes;
(5) be benchmark with the key crossing, optimize the split of each intersection, the optimization aim position of split makes the maximum saturation of all directions traffic flow as far as possible little; Continue operation (4).
More than disclosed only be several specific embodiment of the present invention, those skilled in the art should understand that it not only is confined to these embodiment, but can realize with multiple other forms.

Claims (10)

1. the intelligent traffic signal control system based on the HD video technology comprises outer station equipment, communication network and centring system equipment, it is characterized in that:
Outer station equipment is a unit with single crossing, each crossing all directions is installed high-definition camera respectively, video camera links to each other with HD video detection main frame and is installed in the signal cabinet, and signal lamp inserts traffic signal controlling machine, by the network equipment in the intersection annunciator and centring system interconnection;
Centring system comprises traffic signal control system, traffic offence disposal system, traffic video monitoring system and operating terminal;
Communication network comprises three parts, and promptly intersection annunciator connects to the internal network of the network connection of signal controlling communication unit, communication unit, centring system equipment, and wherein, traffic offence disposal system and video monitoring system adopt the integrated communication access device.
2. intelligent traffic signal control system according to claim 1 is characterized in that, described traffic signal control system passes through network link road mouth signal controller, and implements signal monitoring and control by centring system.
3. intelligent traffic signal control system according to claim 1 is characterized in that, described traffic offence disposal system is gathered the illegal recorded information from the HD video detection system, and illegal information is classified, stores, handled.
4. intelligent traffic signal control system according to claim 1 is characterized in that, described traffic video monitoring system receives the video stream data from the HD video detection system, and video information is stored, transmitted; And provide video-on-demand service.
5. intelligent traffic signal control system according to claim 1 is characterized in that, described operating terminal point duty managerial personnel carry out manual intervention and command scheduling by operating terminal to system.
6. the hardware device of an intelligent traffic signal control system, comprise the HD video overall checkout equipment, it is characterized in that the HD video overall checkout equipment is made up of monitoring main frame, high-definition camera and camera lens, light filling lamp, red signal acquisition module, energy supply control module, switching value I/O module, web-transporting device.
7. hardware device according to claim 6 is characterized in that, the monitoring main frame adopts the high-performance industrial computer.
8. hardware device according to claim 6, it is characterized in that, monitoring host computer using I/O module is gathered the red signal data, simultaneously by access to netwoks HD video and video recording in real time, utilize the motion state of video detection technology and car plate recognizer inspection vehicle, then according to the illegal activities and the current record of traffic direction, angle, area and the license board information comprehensive detection vehicle of vehicle; With detected vehicle pass-through information and illegal information, video information is stored in this locality then, when communicating with central site network, illegal record and vehicle pass-through record is uploaded to the corresponding server in center.
9. the traffic signal control method based on the HD video traffic data is characterized in that, utilizes HD video to obtain flow, occupation rate and average velocity, obtains license board information in real time.
10. traffic signal control method according to claim 9, it is characterized in that, calculate information and regional Dynamic OD data hourage between the upstream and downstream crossing by license board information, the upstream and downstream crossing can be optimized the system phase difference hourage, the Dynamic OD data are optimized the Region control strategy.
CN2010105186136A 2010-10-26 2010-10-26 Intelligent traffic signal control system, method and equipment based on high-definition video technology Pending CN102024330A (en)

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CN108765950A (en) * 2018-06-07 2018-11-06 武汉鑫科信科技有限公司 A kind of open air traffic real-time high-definition video monitoring evidence-obtaining system
CN110796855A (en) * 2019-09-18 2020-02-14 吴明贵 Regional traffic dispersion system based on Internet of things and block chain
CN115691170A (en) * 2022-11-03 2023-02-03 东南大学 Urban trunk road subregion division method based on number plate data
CN115691170B (en) * 2022-11-03 2023-08-29 东南大学 Urban trunk road subarea division method based on license plate data

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Application publication date: 20110420