RU2461070C1 - Security television system - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: system is equipped with two memory modules, two analysis and recognition units, one having a function for analysing and comparing records from the first frame to the last, and the other having a function for analysing and comparing records from the last frame to the first, and a second video monitor, where each television camera is connected through a data network to the corresponding analysis and recognition unit which is connected to the corresponding memory module and the video monitor. Television cameras are arranged such that they can be simultaneously rotated in the horizontal plane by a rotary drive. Optical axes of the television cameras lies on a straight line and are directed oppositely. Motion detectors lie on the security perimeter. The output of each motion detector is connected to the corresponding pulse former, whose output is connected to the input of an OR element, whose output is connected to control inputs of the television cameras and the rotary drive. Efficiency of the security television system lies in elimination of blind spots inside the perimeter of the secured object, which prevents intrusion of the facility.

EFFECT: high efficiency of inspecting a secure territory on the perimeter and avoiding intrusion, achieved due to that the security television system comprises two television cameras connected through a data network to a video monitor and motion detectors connected to a signalling unit.

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Description

The invention relates to security means of open perimeters of objects in railway transport and can be used, in particular, for the protection of traction substations.

A television security and surveillance system is known, comprising television sets installed at observation points and a video surveillance unit installed in at least one guarded object, including a video camera, microphone, video signal converter and amplifier connected to a supply cable, cable distributors, matching unit are inserted into it a television signal installed between the collective television antenna and the first cable distributor; a supply cable amplifier mounted at the end of the a cable, while a modulator connected to the video camera and microphone, a control filter connecting the output of the modulator to the input of the video signal converter, a controlled filter, the output of which is connected to the amplifier, a local oscillator connected to the inputs of the video signal converter and the controlled filter are introduced into the video surveillance unit, and the unit coordination of the television signal contains a frequency-independent attenuator, an amplitude equalizer and a signal mixing unit, the input of which is connected to the collective ante cable us, and output - with a first cable distributor, wherein the frequency-independent attenuator connected to the amplifier supply cable and amplitude equalizer, the output of which is connected to the input of the mixing television signal (RU 2149460, G08B 13/196, 2000).

A disadvantage of the known system is the limited use of video intercoms and it cannot be used to protect railway facilities.

A security television system is known, comprising a first lens, a first television signal sensor, a clock selector and a frame signal shaper, as well as a motion detector and a video control unit, a beam splitter, a second television signal sensor, and a guidance unit for spatial positioning of the second television sensor are introduced signal, and consisting of a first drive kinematically coupled to a first position sensor and a second drive to connected to the second position sensor, the output of the first position sensor being the first output of the guidance unit, and the output of the second position sensor the second output of the guidance unit, as well as a switching unit, the first lens being optically connected to the input of the beam splitter, the first output of which is the normal optical image "and is optically connected to the photo target of the first sensor of the television signal, and the second output of the beam splitter is the output of the enlarged optical image" and optically is connected with the photo target of the second television signal sensor, the output of which is connected to the first information input of the switching unit, the control input of which is connected to the second output of the motion detector, the second information input of the switching unit is connected to the output of the first sensor of the television signal, the third information input of the switching unit is connected to the first output frame signal shaper, the first control input of which is connected to the first output of the guidance unit, and the second control input of the shaper signal frame - to the second output of the guidance unit, and the second output of the motion detector is the output of the alarm signal, and the second input of the motion detector is the input of the alarm reset signal of the television system, while the first input of the motion detector is connected to the output of the switching unit, and the video control input unit to the first output of the motion detector, or alternatively, the first input of the detector is connected to the output of the second sensor of the television signal, and the input of the video control unit to the output of the switching unit (RU 2231123, G08B 13/196, 2002).

A disadvantage of the known television system is the limited ability of the operator in terms of visual control of the situation in the violation zone after the automatic registration of moving small objects.

The closest in technical essence and the achieved result is a security and surveillance system containing modems and an information and display processing unit, the first modem being connected via a collective communication line and the second modem to an information and display processing unit, as well as containing a sensor unit on each protected object , an alarm unit, a video surveillance unit, and an actuator unit, a switching unit has been introduced into the system, configured to select free telephone lines for online transmitting information through the first modem, and each protected object contains a block for combining video information and a display unit for recording, analyzing, processing information, comparing it with information from a data bank and creating a database with its subsequent update, while the sensor unit is connected to the unit alarm system designed to issue an alarm, to control the response time of the block of actuators and their transition to standby mode when simulating the presence of the owner in the apartment, the output of the unit with Ignalization is connected to the actuator unit and to the switching unit connected to the first modem and video information alignment units, the outputs of which are connected to the corresponding display units, and the inputs are connected to certain video surveillance units (RU 2120139, G08B 13/196, 2000).

The security and surveillance system has insufficient visibility of cameras and an insufficiently high degree of recognition of an extraneous object on a video monitoring device.

The technical result of the invention is to increase the efficiency of inspection of the protected area around the perimeter and to exclude the admission of unauthorized persons.

The technical result is achieved by the fact that the security television system, comprising two television cameras, a data transmission network, a video monitoring device, motion detectors and an alarm unit, is equipped with two memory modules, two analysis and recognition units and a second video monitoring device, while each television camera is connected via data transmission network to the corresponding analysis and recognition unit, connected to the corresponding memory module and video monitoring device, television cameras arranged with the possibility of simultaneous rotation in a horizontal plane by a rotation drive, the optical axes of the television cameras are located on one straight line and directed in opposite directions, the motion detectors are located around the perimeter of the protected area, the corresponding pulse shaper is connected to the output of each motion detector, the output of which is connected to the input of the element OR, the output of which is connected to the control inputs of television cameras and a rotation drive, the outputs of the analysis and recognition unit neny with the inputs of the alarm unit.

Figure 1 shows a General view of the protection of the object; figure 2 - security system traction substation; figure 3 is a structural diagram of a television system; figure 4 is a diagram of the rotation of television cameras; 5 is a recognition algorithm; figure 6 - image on two video monitoring devices and figure 7 - scan circular panoramas.

The security television system contains two television cameras 1 and 2, a data transmission network 3, a video monitoring device 4, motion detectors 5 and an alarm unit 6. The system is equipped with two memory modules 7 and 8, two analysis and recognition units 9 and 10, and a second video monitoring device 11 In this case, each television camera 1 (2) is connected via a data transmission network 3 to a corresponding analysis and recognition unit 9 (10) connected to the corresponding memory module 7 (8) and video monitoring device 4 (11).

Television cameras 1 and 2 are arranged to simultaneously rotate in a horizontal plane by a rotation drive 12. Moreover, the optical axis of the television cameras 1 and 2 are located on one straight line and are directed in opposite directions. Motion detectors 5 are located around the perimeter of the protected area. The output of each motion detector 5 is connected to a corresponding pulse shaper 13, the output of which is connected to the input of the OR element 14, the output of which is connected to the control inputs of the television cameras 1 and 2 and the rotation drive 12. The outputs of the analysis and recognition unit 9 and 10 are connected to the inputs of the signaling unit 6.

As an example, the protection of the power supply object of the contact network is considered, on which the main 15 and backup 16 traction substations are installed, turned on and off by the switch 17.

Security television system operates as follows.

The system designed to ensure the safety of railway power supply facilities includes:

- two rotating television cameras 1 and 2 installed on a controlled object, on which motion detectors 5 are located around the perimeter;

- two monitors of video monitoring devices 4 and 11 at the operator’s workplace;

- a program for analyzing visual images at the operator's workplace;

- a database of visual objects on the connected disk array to the operator's workplace program;

- speakers of the alarm unit 6 for reproducing an alarm.

From the television camera 1, the obtained image is transmitted to the monitor of the video monitoring device 4, then in real time the image is processed using the object analysis program, and the operator views these actions.

The program performs the following operations:

- image analysis based on a database of visual objects;

- visual determination of the nature of the object.

Further, the received visual data in the form of a “storyboard” is stored on the hard disk of the operator’s workplace.

From the television camera 2, the resulting image is transmitted to the monitor by the video monitoring device 11, then the image is processed in a similar way using the object analysis program.

After saving the “storyboards” from television cameras 1 and 2, the next step in the program is the analysis and comparison of the recordings. From a television camera 1, analysis is performed from the first frame to the last frame. From a television camera 2, analysis is performed from the last to the first frame.

After the analysis, in case of recognition of hazardous objects on any of the received frames, the system plays an alarm, locks the power supply system and switches to the backup power supply system.

The main 15 and reserve 16 traction substations located near the railway have fences on the guarded perimeters. On the territory of the main 15 traction substation, television cameras 1 and 2 are discreetly located, each of which is separately connected via a data transmission network 3 to video monitoring devices 4 and 11. Images received from television cameras 1 and 2 are respectively transmitted to the monitors of video monitoring devices 4 and 11 and visually are controlled by the operator in real time. The television cameras 1 and 2 fastened together on a support are rotated by a rotation drive 12 clockwise to an angle of 360 ° in the horizontal plane and take a certain number of i-frames (where i = 1,2, 3 ... n). The first television camera 1 takes a circular panorama of the area around the protected object, in which the frame numbers increase from No. 1 to n. The second television camera 2 removes the back space behind the television camera 1. It turns out the same panorama with the same frames in reverse order from n to No. 1.

Further, these frames are analyzed and processed by a special program. The program algorithm is shown in figure 5.

If there are differences on the monitors of video monitoring devices 4 and 11, for example, an intruder appears in the third frame, the alarm unit 6 is automatically turned on and an alarm is issued. The main 15 traction substation is automatically turned off by a switch 17, which switches the power supply of the contact network from the backup 16 traction substation.

The images on the third frame are recognized by comparing the received image with the terrain image on this frame of the corresponding memory module 7 or 8 in blocks 9 or 10 of the analysis and recognition.

The images and geometric parameters of non-hazardous objects (birds, animals, etc.) are preliminarily recorded in memory modules 7 and 8. Images of the terrain at a certain angle of rotation of television cameras 1 and 2 are also preliminarily recorded in memory modules 7 and 8. For example, removing a circular six frames panorama, the necessary fixation of television cameras 1 and 2 and shooting frames will be through 60 °. At twenty frames, shooting with television cameras 1 and 2 will be made through 18 °.

Thus, each panorama frame is automatically read and analyzed. Images of hazardous objects are absent in memory modules 7 and 8, when they are detected, alarm unit 6 is automatically triggered.

For example, the rotation speed of television cameras 1 and 2 with a rotation drive 12 is 30 rpm. A television camera 2 with a wide-angle lens (a viewing angle of 120 °) should take the place of a television camera 1 after it is rotated through 180. The viewing angle located on the same line of television cameras 1 and 2 is 240 °. It takes 1 sec. 180 × 60/30 × 360 = 1 s.

At a speed of 10 rpm, the time for overlapping a dangerous place of the television camera 2 and the corresponding on the other side of the television camera 1 will be 3 seconds 180 × 60/10 × 360 = 3 s.

We select a speed of 20 rpm, t = 180 × 60/20 × 360 = 1.5 s.

The full panorama of the surrounding area will be shot twice by television cameras 1 and 2 in 3 seconds.

The rotation of the television cameras 1 and 2 and their inclusion in the work is carried out automatically according to the commands received from the motion detectors 5 through the pulse shaper 13 and the OR element 14. Servos for turning and turning on the television cameras 1 and 2 and the knife switch 17 are not shown. The power of motion detectors 5 at the facility is carried out continuously. In the event of a threat of attack, television cameras 1 and 2 are switched on by the operator in a continuous inspection mode. Remote control of the rotation drive 12 will allow you to rotate counterclockwise and stop rotation for better inspection of the terrain and the object by the operator.

The facility provides for the inclusion of lighting in the dark. An all-round view by television cameras 1 and 2 can be carried out periodically over a period of time.

The alarm unit 6 responds to all failures of the television cameras 1 and 2 of the motion detectors 5 and issues a message to the operator.

Motion detectors 5 are installed inside the guarded perimeter so that their areas of action overlap the internal border of the guarded object. If the border is violated or destroyed, one of the motion detectors 5 is triggered and the pulse shaper 13 generates control pulses, which are transmitted through the OR element 14 to the control inputs of the television cameras 1 and 2 and the rotation drive 12.

If the operator does not notice any changes and violations on the monitors of video monitoring devices 4 and 11, and the program does not give an alarm signal for images of dangerous objects and violators, then the rotation drive 12 and the television cameras 1 and 2 are turned off.

The effectiveness of a security television system is to exclude unplayable places within the perimeter of a guarded object, which will exclude the possibility of unauthorized persons passing to the object.

Claims (1)

A security television system comprising two television cameras, a data transmission network, a video monitoring device, motion detectors and an alarm unit, characterized in that it is equipped with two memory modules, two analysis and recognition units and a second video monitoring device, with each television camera connected via a transmission network data to the corresponding analysis and recognition unit, connected to the corresponding memory module and video monitoring device, television cameras are located with possibly by simultaneous rotation in the horizontal plane by a rotation drive, the optical axes of the television cameras being located on one straight line and directed in opposite directions, the motion detectors are located around the perimeter of the protected area, the corresponding pulse shaper is connected to the output of each motion detector, the output of which is connected to the input of the OR element, the output of which is connected to the control inputs of the television cameras and the rotation drive, the outputs of the analysis and recognition units, one of which with the function Analysis and comparison of records from the first frame to the last, and the other records with the analysis and comparison function of the last frame to the first, connected to inputs of the alarm unit.

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