KR19990042217A - Image detector by CSI - Google Patents

Abstract

The present invention relates to an image detector by CCTV, and in the past, a detector such as a loop coil was used to detect a traffic volume / vehicle speed / occupancy rate / vehicle distance, etc. on the road. There were many problems in installation and maintenance / management, such as installing a roof coil by digging the ground, and there was a need to use a separate camera device to take an image on a specific road.

The present invention is installed on the road so as to improve the conventional problems, the image pickup means 11 and the camera signal output unit 12 and the camera signal output unit 12 for shooting a moving vehicle for each lane The road condition detecting unit 13 measures and calculates the traffic volume / speed / non-existence time / share / concentration rate based on the captured video signal from the output and the standard video frequency from the input video signal. Defining 32 detection lines, vehicle status detection unit 15 that detects and counts stop vehicles near intersections, detects standard traffic data from input video signals, and stores 6000 standard traffic data volumes in its own buffer. The road status register section 14 for quickly detecting events and queues, and the data processed therefrom are output to the monitor 22 through the channel selector 17 or video compression. (20) and the alarm communication control unit 18 of the control operation for transmitting to the host computer via the modem 21, or indicating the abnormal state of the detection unit and registers (13 to 15) or to the host computer via the modem. And a channel selector 17 for selectively connecting the outputs of the detectors and registers 13 to 15 to the monitor 22 and the video compressor 20, and through the channel selector 17. The present invention provides a video detector 20 that compresses the provided video data, and a video detector by a sieve including a modem 21 and the like.

Description

Image detector by CSI

The present invention relates to an image detector by means of a sieve, which is a traffic / driving speed / size / vehicle, etc. of a vehicle by means of an image photographing means that is suspended on a road without using a loop type vehicle detector buried in the ground. After acquiring the information, the information is provided to the local traffic control controller or the central traffic control controller so that it can be utilized for variable control of traffic signals, etc. according to the frequency of vehicle traffic on the road, or for control of the display of traffic guidance at any place.

The traffic signal control system is a device that operates 24 hours a day, 7 days a week, and not only is controlled in conjunction with adjacent intersections so that the flow of the vehicle is smooth without traffic jams, and timely, weekly and seasonally appropriate control is performed.

In such a traffic signal control system, a loop detector (loop coil) is conventionally used to acquire the number of occupied hours per hour / vehicle speed information of a vehicle driving on a road, and the information obtained by the loop detector is It was connected to a traffic control system to perform control operations such as displaying information on a signboard by a traffic frequency of a vehicle on a road or adjusting a cycle of turning on and off traffic lights.

However, the conventional means of acquiring information on the loop detector buried road not only prevents traffic on a specific road due to vehicle control during disconnection or installation and repair due to road-based weakness, but also repairs / manages the roof coil embedded in the ground. There was a problem that the cost burden is large.

In addition, such a loop detector can obtain the number of occupied hours per vehicle lane / vehicle speed information of the vehicle on the road, but such a loop detector has a problem in obtaining more detailed information, for example, referring to image data on the road. In parallel, she was taking pictures with a Sisidi camera in a special place.

As such, conventionally, traffic information acquisition using a loop detector and image data acquisition using a CD camera are separately performed, and thus, a high cost burden for operating such a system is disadvantageous for scientific and efficient operation.

An object of the present invention is to take a picture of the situation of the road by means of photographing means and then detect and calculate data such as traffic volume, speed, non-existence time, occupancy rate / concentration rate, etc. This allows the upper level computer to control traffic on the road, taking into account traffic volume, speed, non-existence time, share per lane, and concentration rate on a specific road.

Still another object of the present invention is to provide flexibility in controlling traffic light by allowing the control of traffic lights installed on each road to be controlled in proportion to the amount of traffic on the road.

Still another object of the present invention is to collect and use data such as traffic volume / speed / occupancy rate / car distance / car head spacing / car type / traffic accident and queue length detection of each road, thereby expanding and establishing roads or improving roads. It was designed to make a database of various traffic information to be used as basic data in the construction planning and traffic distribution policy.

In particular, the present invention provides an image capturing means and a camera signal output unit which is installed on the road so as to realize the object of the above example, and photographs a moving vehicle for each lane, and the amount of traffic from the image signal which is taken from the output of the camera signal output unit. Road condition sensor that measures and calculates speed, non-existence time, occupancy / concentration rate, etc., and 32 detection lines are defined by using standard video frequency from input video signal. Vehicle status detector that performs the operation, road traffic register that detects standard traffic data from input video signal, stores about 6000 standard traffic data in its own buffer, and detects events and queues quickly. The processed data from the PC to the monitor through the channel selector or the host computer via the video compressor and modem. Alarm communication control unit for a control operation for transmitting to a computer or displaying an abnormal state of the detecting unit and the register unit or transmitting to a host computer through a modem, and selectively outputting the output of the detecting unit and the register unit to a monitor and a video compression unit. It is characterized by an image detector by a sieve device including a channel selector for connecting, a video compressor for compressing video data provided through the channel selector, and a modem.

DETAILED DESCRIPTION Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings so that the specific features of the present invention will be understood.

1 is a reference perspective view of a road on which an image detector of the present invention is installed

2 is a reference diagram showing the operation of the image detector according to the present invention

3 is a reference diagram showing a road detection status screen by the image detector of the present invention

4 is a system circuit block diagram of an image detector of the present invention.

5 is an embodiment showing a road state detection unit of the present invention in more detail

FIG. 6 is a diagram illustrating the channel selector of FIG. 4 in more detail. FIG.

FIG. 7 is a detailed diagram illustrating a channel selection circuit in FIG. 6.

8 is an embodiment of a state in which the image detector of the present invention is connected to the central traffic control unit

** Explanation of symbols for the main parts of the drawings **

11. Video recording means 12. Camera signal output unit

13. Road condition detector 14. Road condition register

15. Vehicle status detector 16. Vehicle speed detector

17. Channel selector 18. Alarm communication control

19. Central communication controller 20. Video compression unit

21.Modem 22. Monitor

23. Image Detection Controller

1 shows traffic data such as traffic volume / speed / occupancy ratio / vehicle distance / vehicle spacing / car type of each lane using the image capturing means 11 of the present invention and the image data photographed from the image capturing means 11. The image detection controller 11 receiving the control signal from the central traffic control unit and transmitting it to the central traffic control unit as necessary and showing the state installed on the road 31.

The image capturing means 11 is arranged on the support 30 so as to properly photograph the oncoming vehicle 5 on one side of the reciprocating lanes 31 and 32 having the center dividing line 33, and the image detecting controller ( 23 is designed to connect and use a plurality of video recording means (11).

In addition, the system circuit block of the image detection controller 23 is shown in FIG.

In this case, the amount of traffic from the video photographing means 11 and the camera signal output unit 12 installed on the road to photograph the moving vehicle for each lane, and the video signal captured from the output of the camera signal output unit 12 It includes a road condition detection unit 13 for measuring and calculating the speed / non-existence time / occupancy per lane / concentration rate and the like.

In addition, the system defines 32 detection lines using a standard video frequency from an input video signal, and detects and counts a stopped vehicle near an intersection, and a standard traffic from an input video signal. The road condition register section 14 detects data, stores about 6000 standard traffic data in its own buffer, and detects events and queues quickly.

In addition, the system outputs the data processed by these detectors 13 to 15 to the monitor 22 through the channel selector 17 or via the video compressor 20 and the modem 21. It includes an alarm communication control unit 18 of a control operation for transmitting to a computer or displaying an abnormal state of the detection unit and registers 13 to 15 or transmitting to a host computer via a modem. 17) and the alarm communication control unit 18 constitutes a central communication controller 19 as one board.

In addition, through the channel selector 17 and the channel selector 17 for selectively connecting the outputs of the detectors and registers 13 to 15 to the monitor 22, the video compressor 20, and the like. The video compression unit 20, a modem 21, and the like for compressing the video data to be included are included.

In addition, the system is also provided with a vehicle speed detector (16) for performing operations such as point average speed measurement and section occupancy measurement / different types of traffic flow for the four lanes, these detectors and registers (13 to 16) 5 has the same basic configuration as shown in FIG. 5, and is divided into the sensing units and the registers 13 to 16 according to how the input image data is used.

That is, the detectors 13 to 15 include an image amplifier 41 for amplifying an image signal input from the photographing means 11 and the camera signal output unit 12, and an image output from the image amplifier 41. An image separator 42 and a synchronous separator 44 for separating the image signal and the synchronous signal from the signal, an AD converter 43 for converting an analog signal from the output of the image separator 42 into a digital signal, and a data buffer. (46), an image input controller 45 and an address buffer 48 for controlling image input with a signal output from the synchronization separator 44, and this address buffer 48 and a data buffer 46 are connected. Extracting the outline / area of the image from the refresh image memory 47, the image processing control circuit 49 and the image display control circuit 50, and the output of the memory 47, and providing them to the microcomputer 52 Contour / Area Extraction Circuit 51 and Microphone for System Control A computer 52 and the like.

In addition, the road condition register unit 14 is different from that in which the image memory 53 capable of storing at least 6000 standard traffic data is additionally connected to a system circuit such as the road condition detector 13.

In addition, the channel selector 17 shows this in more detail as shown in FIG.

Here, the connector 17d connected to the serial data output terminal of the road condition detecting unit 13, the road condition register unit 14, the vehicle condition detecting unit 15, and the vehicle speed detecting unit 16 is provided. Serial digital data is transmitted / received according to the communication protocol of the multiplexer 17a which selects the analog signal to be selected according to the selection control signal of the alarm communication control unit 18 and provides it to the rear end of the monitor 22 or the like. It includes a communication connector 17c for relaying, an oscillator 17b, a monitor connecting jack 17e, a video input jack 17f, and the like.

In addition, the multiplexer 17a circuit illustrates this in more detail as shown in FIG.

Here, a multiplexer IC (MAX) 455 (17g) including a plurality of video analog signal (AV to AVn) input stages and control stages (C1 to C3) is selected, followed by a rear end of the multiplexer IC (17g). An amplifier 17h circuit for amplifying a video analog video signal is included.

In the present invention of this configuration, as shown in Fig. 1, the image capturing means 11 provided on the road 31 is arranged at an appropriate angle for photographing a vehicle approaching it, such as a CD camera.

In this case, when the photographing location is the two lane road 31 as shown in FIG. 2, the measurement angle MZ is set by adjusting the photographing angle of the image photographing means 11, and the markers of the measurement zone MZ are halved. After giving 1 to 4 in the clockwise direction, the detection area portion Dp is set through the input means of the image detection controller 23 of FIG. 4 and an external monitor connected to the image detection controller 23.

The image detection controller 23 generates an RF image signal photographed from a plurality of image photographing means 11 installed in each lane in the camera signal output unit 12, and then, respectively, the road state detecting unit as shown in FIG. 13), the road condition register unit 14, the vehicle condition detector 15, and the vehicle speed detector 16 measure the traffic volume / speed / non-existence time / share / concentration rate, etc., respectively. Calculate and provide to the video compression unit 20 under the control of the alarm communication control unit 18 through the channel selector 17 to compress the selected video signal and provide it to the host computer through the modem 21 or the monitor 22. The status is displayed through the screen.

For example, the road condition detecting unit 13 displays real-time video and date and time display data and / or counted vehicle number and speed and vehicle model data provided to the monitor 22 and displays data for detecting the detection section. It is generated and provided to the monitor 22 or the video compression unit 20.

That is, as shown in FIG. 5, the real-time video signal provided from the photographing means and the camera signal output unit 12 is digitalized by the path of the image amplifier 41 → image separator 42 → SD converter 43 → data buffer 46. The data address is temporarily stored in the data buffer 46, and the data address is generated in the address buffer 48 while adjusting the signal input from the image input control unit 45 according to the synchronization signal extracted from the synchronization separator 44.

In addition, the data buffer 46 and the address buffer 48 store one field screen in the refresh memory under the control of the image processing control circuit 49 and the microcomputer 52, and display one screen from the memory 47. When the data is drawn to the rear stage, the contour / area extraction circuit 51 extracts the contour and region data on the screen and sends them to the microcomputer 52.

The microcomputer 52 calculates video data of the corresponding area at a predetermined time based on the data sent from the contour / area extracting circuit 51, determines the following types of traffic information, and stores the result in the memory. Save it.

① concentration

② Number of vehicles for time T

③ Average vehicle speed for time T (Km / h)

④ Average gap time between vehicles for time T (sec)

⑤ Average headway between vehicles for time T (m)

⑥ Average length of vehicle for time T (dm)

⑦ Share for time T (%)

Where S: Km / h

g: frame

l: cm

tb: time-base (50 frames / sec)

Therefore, the sensing unit and the register unit 13 to 16 can know the traffic volume / speed / non-existence time / share / concentration rate according to each use in the lane of the corresponding road by the above conditional expression.

On the other hand, the contents output from the detection unit and the registers 13 to 16 as described above, if necessary by the alarm communication control unit 18 of the central communication controller 19 through the monitor 22 in the field. By providing the screen as shown in Fig. 3, the user can know the road conditions such as traffic volume / speed / non-existence time / share / concentration rate on the site.

In addition, the sensing unit and the registers 13 to 16 connected to the channel selector 17 as described above are made in the same kind so that the corresponding channel can be selected or they can be selectively used as a mixed channel.

The channel selector 17 connects the sensing unit and the register units 13 to 16 to the connector 17d in the same type or mixed state, respectively, as shown in FIGS. 6 and 7, and then multiplexes the multiplexer Icy of the multiplexer 17a. 17g) When the alarm communication control unit 18 sends a control signal to the control terminals C0 to C2, one of the AV0 to AVn video inputs is selected and provided to the monitor 22 through the amplifier 17h.

In addition, the communication connection jack of the alarm communication control unit 18 is connected through the communication connection jack 17c to communicate with the video digital data.

In addition, the alarm communication control unit 18 detects an abnormal state of each detection unit and registers 13 to 16 to display an alarm lamp, or to display real-time image digital data of each detection unit and registers 13 to 16 as a modem ( 21) to the host computer.

At this time, the host computer or the central communication controller 19 can perform 1: 1 communication by calling each communication protocol.

In addition, since the central communication controller 19 requires two photographing means and a sensing unit in one two-lane reciprocating road, and eight photographing means and a sensing unit are respectively required at an intersection, they are designed to selectively accommodate them.

In addition, the traffic volume / speed / non-existence time / occupancy rate / concentration rate traffic information measured by the detection unit and the register unit 13 to 16 is the central traffic control unit 51 of the traffic control system 5 of FIG. The transmission data is transmitted through the modem 21, and the transmission data at this time is to transmit traffic volume / speed / occupancy rate / car distance / car head spacing / car model information obtained by the image detection controller 23. In the control room of a personal computer-class facility by a general microcomputer, which is digitally processed and connected to the central traffic control unit 51 or the image detection controller 23, video image information of a corresponding region can be stored as necessary.

In addition, when the traffic information is transmitted from the image detection controller 23 to the central traffic control unit 51, data related to traffic volume / speed / occupancy rate / vehicle distance / car head spacing / car type and image image data through the video compression unit 20. Compression can be performed to increase the efficiency of data transfer.

On the other hand, if the traffic information of each region transmitted by the above system is transmitted to the central traffic control unit 51, the central traffic control unit 51 adjusts the period of the signal, etc. based on the traffic volume of the corresponding area, in this case When the traffic control unit 51 provides the local traffic signal control unit 55 with a traffic light blinking cycle signal such as an intersection traffic light such as red / yellow / blue or a crosswalk, the local traffic signal control unit 55 determines the traffic light 56. It is driven in cycle.

Therefore, when a large number of vehicles are crowded in a specific area, a signal cycle operation such as shortening of a crosswalk or the like and shortening of an intersection traffic light may be performed to promote smoothness of traffic communication.

In addition, the central traffic control unit 51 transmits display information for guiding traffic conditions of a specific area through the traffic information display board 52 and the traffic information vision 54 installed in a specific area, and on the other hand, the traffic status plate 53. ), You can check the traffic conditions in each area and manage and control the traffic in all areas.

The present invention is to obtain the traffic information of a specific area, the traffic information of a specific road in the system for performing the central control and management by using an image detector by a camera photographing means using the traffic volume / vehicle speed / road occupancy / distance between the specific road By acquiring traffic information of real-time video data as well as vehicle head spacing / car type and automatically transmitting it to the central traffic control section, the central traffic control section makes it easy to manage and control data for traffic conditions and control on each local road. Because it can also receive a video image of a conventional solution to a complex problem, such as a separate installation of a camera and a loop coil for on-site shooting.

Claims (3)

Traffic volume / from the image photographing means 11 and the camera signal output unit 12 installed on the road to photograph the moving vehicle for each lane, and from the image signal photographed in succession from the output of the camera signal output unit 12; Road condition detection unit 13 that measures and calculates speed, non-existence time, occupancy / concentration rate, etc., and 32 detection lines using standard video frequency from input video signal and detects stationary vehicles near intersections. And a vehicle state detection unit 15 which performs a counting operation, and a road state register which detects standard traffic data from an input video signal, stores about 6000 standard traffic data in its own buffer, and quickly detects events and queues. The unit 14 and the data processed therefrom are output to the monitor 22 through the channel selector 17, or transmitted to the host computer through the video compression unit 20 and the modem 21. The alarm communication control unit 18 of the control operation for displaying an abnormal state of the detection unit and the register units 13 to 15 or transmitting to the host computer through a modem, and the detection unit and the register units 13 to 15 A channel selector 17 for selectively connecting the output to a monitor 22, a video compressor 20, and the like, a video compressor 20 for compressing video data provided through the channel selector 17, Image detector by means of a sieve characterized by a configuration including a modem 21 and the like 2. The apparatus of claim 1, wherein the detectors and registers 13 to 16 are provided with an image amplifier 41 for amplifying an image signal input from the photographing means 11 and the camera signal output unit 12. 41. A video separator 42 and a synchronous separator 44 for separating the video signal and the synchronous signal from the video signal output from the video signal, and an AD converter for converting an analog signal from the output of the video separator 42 into a digital signal. (43) and data buffer 46, an image input controller 45 and an address buffer 48 for controlling image input with signals output from the synchronous separator 44, and this address buffer 48 and a data buffer. A microcomputer by extracting the outline / area of the image from the refresh image memory 47, the image processing control circuit 49 and the image display control circuit 50, and the output of the memory 47, to which the 46 is connected. Providing configuration / domain extraction society (52) And a microcomputer 52 of a control operation for calculating and storing traffic information data on the basis of real-time data provided from the contour / area extraction circuit 51, and the like. Image detector by 3. The traffic information data calculated by the microcomputer 52 according to claim 2, wherein ① concentration ② Number of vehicles for time T ③ Average vehicle speed for time T (Km / h) ④ Average gap time between vehicles for time T (sec) ⑤ Average headway between vehicles for time T (m) ⑥ Average length of vehicle for time T (dm) ⑦ Share for time T (%) Where S: Km / h g: frame l: cm tb: time-base (50 frames / sec), Image detector by means of