CN101968927A - Detection system for acquiring traffic flow by using high-definition video and microwave detection selectively - Google Patents
Detection system for acquiring traffic flow by using high-definition video and microwave detection selectively Download PDFInfo
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Abstract
The invention discloses a system for detecting urban road traffic flow by using high-definition video and microwave detection selectively. The system comprises a terminal acquisition unit and a control unit, wherein the terminal acquisition unit comprises a high-definition video acquisition module and a microwave data acquisition module; and the control unit comprises an interruption threshold value storage module, a traffic flow value comparison module, and an interruption control module. In the normal state of the system, only high-definition video acquisition module is started, so that the control unit processes and judges video information sent by the high-definition video acquisition module to acquire traffic flow data; and when the traffic flow data is abnormal, the microwave data acquisition module is automatically started. The system overcomes the disadvantages of the use of a single detector, can acquire accurate real-time data information of traffic flow in a severe environment of extremely low visibility, and lays a solid foundation for controlling and managing urban traffic by using modern technology.
Description
Technical field
The present invention relates to intelligent transportation control field, be specifically related to a kind of detection system that obtains the road automobile flow of traffic flow data based on the testing result of HD video and two kinds of different data acquisition modules of Microwave Measurement.
Background technology
Handle the technology that transport information is gathered based on video image, become a kind of important detection technique and be subjected to extensive attention both domestic and external, Chinese patent literature CN 2553460Y, CN1186750C and CN2720742Y disclose above-mentioned transport information checkout equipment based on the video image acquired information.The principle of above-mentioned Video Detection is after the traffic video detecting sensor obtains the traffic scene image by the video camera that is positioned at the road top, image is transferred to control center, and the processing unit that utilizes control center analyzes automatically the image that receives and further handles scene image information, thereby obtains corresponding traffic flow data.
But in above-mentioned prior art, the video system of using is ordinary video, the ubiquitous problem of Video Detection sensor wherein is: the image that sensor obtains by video camera is subjected to the influence of several factors, and first, the outward appearance of vehicle depends on that vehicle is provided with the angle of position with respect to video camera in the video that captures of video camera; The second, blocking mutually between the vehicle; Three, illumination also can affect to the outward appearance of vehicle with the change of weather in time; Four, the influence that instantaneous variation produced of vehicle on position, direction, the vehicle that for example comes into view has different speed, and aspects such as the shape of vehicle, size, color all can change in the video that captures; Five, the body color of vehicle is subject to the influence of perimeter lights light color and the interference of background.
Development along with technology, the development of HD video video camera and use have solved the technical matters of an above-mentioned part to a great extent, and raising, the development of network service bandwidth and the reduction of HD video video camera manufacturing cost of computer picture Video processing ability in addition, the HD video detection technique has become the main flow direction of magnitude of traffic flow video detection technology development at present.Utilize the HD video video camera can obtain video pictures more clearly, and can monitor a plurality of tracks simultaneously so that obtain the information of the whole section magnitude of traffic flow more accurately.In the prior art, 2008 the 8th volumes the 6th of periodical " traffic and transportation system engineering and information " are interim, are entitled as to disclose in " based on the Beijing Olympic through street traffic comprehensive detection system of HD video " to use HD video that comprehensive detection, telecommunication flow information collection and the multi-service of gateway, through street are used.
At present, adopt the HD video video camera to carry out video capture also further obtains the magnitude of traffic flow by technical finesse information, be widely used, especially in the domestic intelligent transportation system of China, all be to use above-mentioned monitoring means, but above-mentioned employing HD video video camera obtains traffic video and further obtains the means of relevant traffic information data, can be because blocking mutually between the vehicle, perhaps vehicle color and the shape in the video pictures that causes catching in the vehicle fast running process changes, and the problem that can't react information of vehicles in the video pictures that captures in the low-down environment of visibility, the video pictures information that causes control center to obtain can't be reacted vehicle condition truly, information of vehicle flowrate also just can't obtain instant road information.
In the prior art, Chinese patent literature CN2929859Y discloses a kind of microwave vehicular traffic information detector, it comprises and is used to launch chirped microwave signal circuit, receives the microwave part that the signal circuit that reflects and microwave antenna are formed, mainly by analog to digital conversion, be used for the real-time FFT conversion process, go out the DSP part of information of vehicles according to difference signal characteristic calculation of parameter constantly, and the digital circuit processing section formed of relevant data storage and control interface partial circuit.This technology has realized vehicle flowrate, the speed of a motor vehicle, car are monitored to the all-weather real-time of occupation rate and vehicle by described microwave traffic detecting device.The influence that is not subjected to weather condition, light intensity and car speed is obtained and caught to above-mentioned microwave technology for information, can obtain immediately and traffic information data accurately.But important information acquisition terminal as the traffic intelligent control module, need carry out the real-time video picture when calling for the shift position of some traffic hazard or suspected vehicles, the microwave traffic information system can't realize that then the means of single like this dependence Microwave Measurement can't really realize intelligent transportation.
But so far also not with above-mentioned two kinds of means and be used for realizing the technology that intelligent transportation detects, and when realizing accurately monitoring, guarantee minimum detection cost, the application has just realized the problems referred to above by rational technological means setting.
Summary of the invention
Technical matters to be solved by this invention is all to be that single use HD video or Microwave Measurement data realize the problem of analysis, statistics and the storage of the same section multilane of road motor vehicle flow in the prior art, but all has respectively such as the technical matters in the aforementioned background art.The invention provides for this reason a kind of based on alternative use HD video and Microwave Measurement obtain the magnitude of traffic flow the urban road traffic flow amount detection systems.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of urban road traffic flow amount detection systems of selecting to use HD video and Microwave Measurement is made up of terminal collecting unit and control module;
Described terminal collecting unit is made up of high definition video collecting module and microwave data acquisition module;
Described control module comprises data processing module, and described data processing module is connected with described high definition video collecting module, described microwave data acquisition module respectively;
Described control module comprises that also the magnitude of traffic flow detects data management module, and the described magnitude of traffic flow detects data management module and is connected with described data processing module;
Described control module also comprises outage threshold memory module, vehicle flowrate numerical value comparing module and interrupt control module, the data message of two variablees of storage in the described outage threshold memory module, one of them variable is the time period variable, and another variable is and the corresponding standard vehicle flowrate of described time period variable data variable;
Described vehicle flowrate numerical value comparing module detects data management module with the described outage threshold memory module and the described magnitude of traffic flow respectively and is connected, described vehicle flowrate numerical value comparing module receives the real-time traffic flow amount data that the described magnitude of traffic flow detects the data management module transmission, described vehicle flowrate numerical value comparing module by with described outage threshold memory module to be connected being stored in its inner threshold value be that standard vehicle flowrate data are called comparison;
Described interrupt control module is connected with described vehicle flowrate numerical value comparing module, receive the comparison result that described numerical value comparing module sends, and send corresponding interrupt control instruction to the described high definition video collecting module and the microwave data acquisition module that are connected with described interrupt control module respectively.
Described outage threshold memory module detects data management module with the described magnitude of traffic flow and is connected, receive the described magnitude of traffic flow and detect the data message that data management module sends, described data message comprises two variablees, a variable is the time period variable, and another variable is and the corresponding vehicle flowrate data variable of described time period variable; The standard vehicle flowrate data that described outage threshold memory module is averaged and is set at each time period correspondence the traffic flow data of certain historical time section.
The bidirectional transfer of information that is connected in described data processing module, the magnitude of traffic flow detection data management module, vehicle flowrate numerical value comparing module and four modules of described interrupt control module between per two adjacent blocks connects.
Described control module also comprises the traffic flow data memory module that is connected with described magnitude of traffic flow detection data management module.
Described control module also comprises the video display module that is connected with described high definition video collecting module, described high definition video collecting to video pictures be delivered to described video display module and show.
Described high definition video collecting module and described microwave data acquisition module are arranged on the same section of road.
The method that described traffic flow detection system detects the magnitude of traffic flow, it comprises the steps:
(1) opens described traffic flow detection system, and connect described high definition video collecting module by described interrupt control module;
(2) described high definition video collecting module sends to data processing module with the video pictures that captures, described data processing module is analyzed and computing the video pictures by described high definition video collecting module transmission that receives, and video information is converted into the real-time traffic flow amount data message of the current mensuration section of road;
(3) described data processing module is sent to real-time traffic flow amount data message after treatment in the described magnitude of traffic flow detection data management module of described control module, and the above-mentioned data message that obtains is in real time stored; The described magnitude of traffic flow detects data management module and simultaneously real-time traffic flow amount data message after treatment is sent in the described vehicle flowrate numerical value comparing module, and described vehicle flowrate numeric ratio is compared to standard vehicle flowrate data and real-time traffic flow amount data that should pairing time period correspondence of time in the described outage threshold memory module of module invokes;
If the numerical value of above-mentioned real-time traffic flow amount data is greater than or equal at 90% o'clock of standard vehicle flowrate value data, described interrupt control module is not carried out any instruction;
If the numerical value of above-mentioned real-time traffic flow amount data was less than 90% o'clock of described standard vehicle flowrate value data, described vehicle flowrate numerical value comparing module is sent to described interrupt control module with comparison result, described interrupt control module sending controling instruction is to described microwave data acquisition module, the interruption that is connected with described microwave data acquisition module is connected in control, use the microwave data acquisition module that vehicle flowrate is detected, and the vehicle flowrate data information transfer that detection is obtained is to described data processing module;
(4) the real-time traffic flow amount data that after data processing, obtain when the video that obtains by described high definition video collecting module return to once more be greater than or equal to pairing standard vehicle flowrate value data of pairing time period of this time 90% the time, described interrupt control module controls disconnects the interruption that is connected with described microwave data acquisition module, only adopts the high definition video collecting module that data message is gathered.
In described step (1), described interrupt control module transfer instruction is opened described data processing module to described data processing module.
The described magnitude of traffic flow detects the traffic flow data unloading on the non-same day after data management module will be stored in described traffic flow data memory module.
The video display module of described control module shows the HD video picture that described high definition video collecting module is gathered, and manually controls the interrupt control module according to the actual traffic situation of described HD video picture reaction and assigns instruction.
The invention has the advantages that:
The urban road traffic flow amount detection systems of selecting to use HD video and Microwave Measurement of the present invention, be provided with high definition video collecting module and microwave data acquisition module at acquisition terminal, generally only use described high definition video collecting module, and can be according to the processing acquisition accurate data information of described video pictures by described data processing module; When since weather limited, such as dense fog or heavy rain weather, can make the vehicle flowrate data reduction at ordinary times occur differing from, if generalized case be lower than identical period vehicle flowrate data 90% be considered as traffic current and measure existing fluctuation, traffic flow detection system of the present invention is provided with pairing standard vehicle flowrate data in each time period, and set the threshold value that above-mentioned data are different time sections, comparison by described vehicle flowrate numerical value comparing module, when described real-time traffic flow amount data less than corresponding time period threshold value 90% the time, explanation may be because the problems affect of visibility has arrived the minimizing of vehicle flowrate data, opens described microwave data acquisition module so control described interrupt control module controls; When real-time traffic flow amount data return to be greater than or equal to corresponding time period threshold value 90% the time, promptly can close described microwave data acquisition module by the interrupt control module controls once more; Realized like this descending also to obtain the instant data message of vehicle flowrate accurately at inclement weather environment such as the very low rain of visibility, snow, wind, mists, for adopt control of up to date technics means and management urban transportation, in time relieve traffic congestion stream, avoid road traffic to block up and reduce traffic hazard and lay a solid foundation.In addition, detection system among the present invention also is provided with video display module, described video display module is convenient to the staff on the one hand traffic scene is monitored in real time, evidence obtaining when helping the traffic hazard generation, the high-definition image that described video display module can be shown is as supplementary means on the other hand, judge the work quality of described high definition video collecting module more intuitively, to determine whether to open described microwave data acquisition module.
Description of drawings
For technical solutions according to the invention are described better, the present invention will describe technique scheme in further detail in conjunction with following accompanying drawing.
Fig. 1 is the structural drawing of urban road traffic flow amount detection systems of the present invention;
Fig. 2 is the structural drawing of the convertible embodiment of urban road traffic flow amount detection systems of the present invention.
Embodiment
Embodiment 1
Be the structural drawing of selecting to use the urban road traffic flow amount detection systems of HD video and Microwave Measurement of the present invention as shown in Figure 1, described as we can see from the figure traffic flow detection system comprises terminal collecting unit and control module, described control module can be arranged in the Control Room, and described terminal collecting unit is made up of high definition video collecting module and microwave data acquisition module.Wherein, what described high definition video collecting module adopted is 5,000,000 pixel high-definition digital video camera and camera lens corresponding with it, 2/3 type IT CCD, valid pixel several 2456 (H) x 2058 (V), Pixel Dimensions 3.45x3.45 μ m, adopt progressive scan mode, frame frequency is 15fps, the C lens mount, electronic shutter 1/15～1/10, have the external trigger function 000 (second), digital 8/10/12bit GigE Vision; In the present embodiment, described high definition video collecting module is provided with 2 optical fiber interfaces, is used for the transmission of video information, and it can realize gathering in real time the vehicle HD video data by road section.Microwave data acquisition module in the present embodiment can use any commercially available microwave vehicle information detector, generally by the chirped microwave signal circuit of emission, receive that the circuit reflect signal and microwave antenna form; Be connected with 2 standard RS485 interfaces on the microwave data acquisition module described in the present embodiment, described microwave data acquisition module can carry out Microwave Measurement to the vehicle that is greater than or equal to 8 track to be measured simultaneously, thereby certainly also can be by changing the classification (such as the zero-time that detects data message and sense cycle) that the region quantity, scope and the detecting device output information that change Microwave Measurement are set in described microwave data acquisition module.
Described control module comprises that the data processing module and the magnitude of traffic flow detect data management module, described data processing module is connected with described microwave data acquisition module with described high definition video collecting module respectively, and the described magnitude of traffic flow detects data management module and is connected with described data processing module.Select in the present embodiment industrial computer mainboard that described data processing module is AMD LX700 433MHz CPU is set, have 1 gigabit network interface, 1 optical fiber interface, 1 plate carries the RS485 interface.Wherein, described optical fiber interface is connected extremely described data processing module inside of the Optical Fiber Transmission that realizes after video pictures that high-definition camera is captured is by described connection by the optical fiber interface with described high definition video collecting module; Described gigabit network interface is connected by the network interface with described magnitude of traffic flow detection data management module, realizes that by Ethernet magnitude of traffic flow testing result is by the data transmission of communication front-end equipment to centre management equipment; Described plate carries the RS485 interface in order to realize being connected of the two with the microwave data acquisition module, the data transmission of the magnitude of traffic flow that the microwave data acquisition module is collected is to described data processing module, and transfers to the described magnitude of traffic flow through described data processing module and detect in the data management module.
The magnitude of traffic flow described in the present embodiment detects data management module and is made up of server and machine box for server, server adopts two CPU, and CPU frequency is greater than 3.6GHz, and buffer memory is greater than 2M, support EM64T, support RAID, the DDR2 internal memory, internal memory is greater than 8G, its inner hard disk is no less than two, every hard-disk capacity is greater than 1TB, and has the hot-plug redundant power supply, supports several operation systems such as Linux Windows and supports telemanagement; Described machine box for server adopts two back plate design of full redundancy, network, SAN switch, administration module, power supply, fan are redundant configuration, power supply, fan are all supported hot plug and are built in the cabinet, the light-path diagnosis of server, processor, internal memory, power supply, fan, Switching Module, administration module, hard disk and all kinds of expansion cards is provided, has multipart failure prediction analysis ability such as hard disk, processor, fan and internal memory; The described machine box for server that the described magnitude of traffic flow detects data management module is provided with external-connected port, and described external-connected port can carry out data transmission by Ethernet.
Control module described in the present embodiment also comprises the vehicle flowrate numerical value comparing module that is connected with magnitude of traffic flow detection data management module, the outage threshold memory module and the interrupt control module that are connected with described vehicle flowrate numerical value comparing module, after averaging to the traffic flow data of certain historical time section, described outage threshold memory module draws the standard vehicle flowrate data of each time period correspondence, be set and be threshold value, described threshold value also can manually be imported.Described interrupt control module is connected with described high definition video collecting module and microwave data acquisition module respectively, the opening and closing of described high definition video collecting module of described interrupt control module controls and described microwave data acquisition module.
In the present embodiment, realize connecting by optical fiber interface between described interrupt control module and the described high definition video collecting module, realize connecting by standard RS485 interface between described interrupt control module and the described microwave data acquisition module; The described vehicle flowrate numerical value comparing module and the described magnitude of traffic flow detect data management module and carry out data transmission by Ethernet, and described vehicle flowrate numerical value comparing module realizes being connected by standard RS485 interface with described interrupt control module with described outage threshold memory module, described vehicle flowrate numerical value comparing module.
The course of work of the urban road traffic flow amount detection systems described in the present embodiment is as follows:
(1) opens described traffic flow detection system, and connect described high definition video collecting module by described interrupt control module;
(2) described high definition video collecting module sends to data processing module with it by the video pictures that the HD video video camera captures, described data processing module is analyzed and computing the video pictures by described high definition video collecting module transmission that receives, and video information is converted into the real-time traffic flow amount data message of the current mensuration section of road;
(3) described data processing module is sent to real-time traffic flow amount data message after treatment in the described magnitude of traffic flow detection data management module of described control module, and the above-mentioned data message that obtains is in real time stored; The described magnitude of traffic flow detects data management module and simultaneously real-time traffic flow amount data message after treatment is sent in the described vehicle flowrate numerical value comparing module, and described vehicle flowrate numeric ratio is compared to standard vehicle flowrate data and real-time traffic flow amount data that should pairing time period correspondence of time in the described outage threshold memory module of module invokes;
If the numerical value of above-mentioned real-time traffic flow amount data is greater than or equal at 90% o'clock of standard vehicle flowrate value data, described interrupt control module is not carried out any instruction;
If the numerical value of above-mentioned real-time traffic flow amount data was less than 90% o'clock of described standard vehicle flowrate value data, described numerical value comparing module is sent to described interrupt control module with comparison result, described interrupt control module sending controling instruction is to described microwave data acquisition module, the interruption that is connected with described microwave data acquisition module is connected in control, use the microwave data acquisition module that vehicle flowrate is detected, and the vehicle flowrate data information transfer that detection is obtained is to described data processing module;
(4) the real-time traffic flow amount data that after data processing, obtain when the video that obtains by described high definition video collecting module return to once more be greater than or equal to pairing standard vehicle flowrate value data of pairing time period of this time 90% the time, described interrupt control module controls disconnects the interruption that is connected with described microwave data acquisition module, only adopts the high definition video collecting module that data message is gathered.
Embodiment 2
Be the another embodiment that selects to use the urban road traffic flow amount detection systems of HD video and microwave detector of the present invention as shown in Figure 2, module of high definition video collecting described in the present embodiment and described microwave data acquisition module are arranged on the same section of road.Than embodiment 1, the described detection system of present embodiment has increased traffic flow data memory module and video display module, described traffic flow data memory module detects data management module with the described magnitude of traffic flow and is connected, and the described magnitude of traffic flow detects the traffic flow data unloading on the non-same day after data management module will be stored and carry out data backup in described traffic flow data memory module.Described traffic flow data memory module is made up of the disk array storer, and the disk array storer has the 3TB useful capacity at least, and the single-deck capacity is 300GB, and rotating speed is 10K/rpm, supports logical volume to divide, and supports online expansion or changes hard disk; Adopt two RAID controllers, support RAID 0+1, RAID 0,1, and 3,5; The 512MB high-speed cache can expand to 2GB; Main frame has 4 optical-fibre channels (FC) exchange and FC arbitrated loop (FC-AL), is used to connect the magnitude of traffic flow and detects data management module.
Video display module described in the present embodiment is connected by optical fiber interface with described high definition video collecting module, and the video pictures that described high definition video collecting module is collected is delivered to described video display module and shows.
In addition, also select to increase to be provided with the data interface in the data processing module of this embodiment, described data interface is USB and MiniIDE interface, but carry DOM electronic hard disc and CF card come memory system data.
The bidirectional transfer of information that is connected to that the data processing module described in the present embodiment and the described magnitude of traffic flow detect between the data management module connects, and described connected mode is for to be connected by the mode of network interface with Ethernet.It is that bidirectional transfer of information is connected with described magnitude of traffic flow detection data management module that described outage threshold memory module also is set, and described connected mode is also for to be connected by the mode of network interface with Ethernet.
Its course of work is:
(1) opens described traffic flow detection system, and connect described high definition video collecting module by described interrupt control module.
(2) described high definition video collecting module sends to data processing module with it by the video pictures that the HD video video camera captures, simultaneously also send to described video display module by optical fiber, described data processing module is analyzed and computing the video pictures by described high definition video collecting module transmission that receives, and video information is converted into the real-time traffic flow amount data message of the current mensuration section of road;
(3) described data processing module is sent to real-time traffic flow amount data message after treatment in the described magnitude of traffic flow detection data management module of described control module, and the above-mentioned data message that obtains is in real time stored; The described magnitude of traffic flow detects data management module and simultaneously real-time traffic flow amount data message after treatment is sent in the described vehicle flowrate numerical value comparing module, in addition, the described magnitude of traffic flow detects data management module and sends to described outage threshold memory module with the time period of proxima luce (prox. luc) and with pairing vehicle flowrate data of this time period, as standard vehicle flowrate data;
Described vehicle flowrate numeric ratio is compared to standard vehicle flowrate data and real-time traffic flow amount data that should pairing time period correspondence of time in the described outage threshold memory module of module invokes;
If the numerical value of above-mentioned real-time traffic flow amount data is greater than or equal at 90% o'clock of standard vehicle flowrate value data, described interrupt control module is not carried out any instruction;
If the numerical value of above-mentioned real-time traffic flow amount data was less than 90% o'clock of described standard vehicle flowrate value data, described numerical value comparing module is sent to described interrupt control module with comparison result, described interrupt control module sending controling instruction is to described microwave data acquisition module, the interruption that is connected with described microwave data acquisition module is connected in control, use the microwave data acquisition module that vehicle flowrate is detected, and the vehicle flowrate data information transfer that detection is obtained is to described data processing module;
(4) the real-time traffic flow amount data that after data processing, obtain when the video that obtains by described high definition video collecting module return to once more be greater than or equal to pairing standard vehicle flowrate value data of pairing time period of this time 90% the time, described interrupt control module controls disconnects the interruption that is connected with described microwave data acquisition module, only adopts the high definition video collecting module that data message is gathered.
In the course of work of described detection system, the staff can carry out auxiliary judgment to the duty of described high definition video collecting module according to the real-time HD video that described video display system shows, manually controls the interrupt control module according to described judged result and assigns the instruction of opening or closing the microwave data acquisition module.
Also can select to be provided with described data processing module, the magnitude of traffic flow in the foregoing description and detect that the bidirectional transfer of information that is connected between per two adjacent blocks connects in data management module, vehicle flowrate numerical value comparing module and four modules of described interrupt control module, the instruction that the described data processing module of control is opened is set in described interrupt control module, and in described step (1) with described instruction issuing to described data processing module, control the unlatching of described data processing module.
Obviously; the foregoing description only is for example clearly is described; and be not qualification to embodiment; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here need not also can't give to all embodiments exhaustive, and the conspicuous variation of being extended out thus or the change still be among the protection domain of the invention.
Claims (10)
1. the urban road traffic flow amount detection systems that can select to use HD video and Microwave Measurement is made up of terminal collecting unit and control module;
Described terminal collecting unit is made up of high definition video collecting module and microwave data acquisition module;
Described control module comprises data processing module, and described data processing module is connected with described high definition video collecting module, described microwave data acquisition module respectively;
Described control module comprises that also the magnitude of traffic flow detects data management module, and the described magnitude of traffic flow detects data management module and is connected with described data processing module;
It is characterized in that:
Described control module also comprises outage threshold memory module, vehicle flowrate numerical value comparing module and interrupt control module, the data message of two variablees of storage in the described outage threshold memory module, one of them variable is the time period variable, and another variable is and the corresponding standard vehicle flowrate of described time period variable data variable;
Described vehicle flowrate numerical value comparing module detects data management module with the described outage threshold memory module and the described magnitude of traffic flow respectively and is connected, described vehicle flowrate numerical value comparing module receives the real-time traffic flow amount data that the described magnitude of traffic flow detects the data management module transmission, described vehicle flowrate numerical value comparing module by with described outage threshold memory module to be connected being stored in its inner threshold value be that standard vehicle flowrate data are called comparison;
Described interrupt control module is connected with described vehicle flowrate numerical value comparing module, receive the comparison result that described numerical value comparing module sends, and send corresponding interrupt control instruction to the described high definition video collecting module and the microwave data acquisition module that are connected with described interrupt control module respectively.
2. traffic flow detection system according to claim 1, it is characterized in that: described outage threshold memory module detects data management module with the described magnitude of traffic flow and is connected, receive the described magnitude of traffic flow and detect the data message that data management module sends, described data message comprises two variablees, a variable is the time period variable, and another variable is and the corresponding vehicle flowrate data variable of described time period variable; The standard vehicle flowrate data that described outage threshold memory module is averaged and is set at each time period correspondence the traffic flow data of certain historical time section.
3. traffic flow detection system according to claim 1 and 2 is characterized in that: the bidirectional transfer of information that is connected in described data processing module, the magnitude of traffic flow detection data management module, vehicle flowrate numerical value comparing module and four modules of described interrupt control module between per two adjacent blocks connects.
4. traffic flow detection system according to claim 1 and 2 is characterized in that: described control module also comprises the traffic flow data memory module that is connected with described magnitude of traffic flow detection data management module.
5. traffic flow detection system according to claim 1, it is characterized in that: described control module also comprises the video display module that is connected with described high definition video collecting module, described high definition video collecting to video pictures be delivered to described video display module and show.
6. according to claim 1 or 2 or 5 described traffic flow detection systems, it is characterized in that: described high definition video collecting module and described microwave data acquisition module are arranged on the same section of road.
7. the method that adopts the arbitrary described traffic flow detection system of claim 1 to 6 that the magnitude of traffic flow is detected, it comprises the steps:
(1) opens described traffic flow detection system, and connect described high definition video collecting module by described interrupt control module;
(2) described high definition video collecting module sends to data processing module with the video pictures that captures, described data processing module is analyzed and computing the video pictures by described high definition video collecting module transmission that receives, and video information is converted into the real-time traffic flow amount data message of the current mensuration section of road;
(3) described data processing module is sent to real-time traffic flow amount data message after treatment in the described magnitude of traffic flow detection data management module of described control module, and the above-mentioned data message that obtains is in real time stored; The described magnitude of traffic flow detects data management module and simultaneously real-time traffic flow amount data message after treatment is sent in the described vehicle flowrate numerical value comparing module, and described vehicle flowrate numeric ratio is compared to standard vehicle flowrate data and real-time traffic flow amount data that should pairing time period correspondence of time in the described outage threshold memory module of module invokes;
If the numerical value of above-mentioned real-time traffic flow amount data is greater than or equal at 90% o'clock of standard vehicle flowrate value data, described interrupt control module is not carried out any instruction;
If the numerical value of above-mentioned real-time traffic flow amount data was less than 90% o'clock of described standard vehicle flowrate value data, described vehicle flowrate numerical value comparing module is sent to described interrupt control module with comparison result, described interrupt control module sending controling instruction is to described microwave data acquisition module, the interruption that is connected with described microwave data acquisition module is connected in control, use the microwave data acquisition module that vehicle flowrate is detected, and the vehicle flowrate data information transfer that detection is obtained is to described data processing module;
(4) the real-time traffic flow amount data that after data processing, obtain when the video that obtains by described high definition video collecting module return to once more be greater than or equal to pairing standard vehicle flowrate value data of pairing time period of this time 90% the time, described interrupt control module controls disconnects the interruption that is connected with described microwave data acquisition module, only adopts the high definition video collecting module that data message is gathered.
8. the method that the magnitude of traffic flow is detected according to claim 7 is characterized in that: in described step (1), described interrupt control module transfer instruction is opened described data processing module to described data processing module.
9. the method that the magnitude of traffic flow is detected according to claim 8 is characterized in that: the described magnitude of traffic flow detects the traffic flow data unloading on the non-same day after data management module will be stored in described traffic flow data memory module.
10. the method that the magnitude of traffic flow is detected according to claim 7, it is characterized in that: the video display module of described control module shows the HD video picture that described high definition video collecting module is gathered, and manually controls the interrupt control module according to the actual traffic situation of described HD video picture reaction and assigns instruction.
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| CN104200657A (en) * | 2014-07-22 | 2014-12-10 | 杭州智诚惠通科技有限公司 | Traffic flow parameter acquisition method based on video and sensor |
| CN106781541A (en) * | 2016-12-16 | 2017-05-31 | 合肥寰景信息技术有限公司 | A kind of vehicle flow detection system based on video analysis |
| CN111127901A (en) * | 2020-02-28 | 2020-05-08 | 江苏航天大为科技股份有限公司 | Expressway emergency lane snapshot linkage control system |
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