Closed-circuit television system

 

The invention relates to a television technique and can be used in control systems, surveillance and detection of dynamic objects, as well as other devices TV automation. The technical result consists in extending the functionality of closed-circuit television system by presenting the operator image zone violations on an enlarged scale with a minimum delay of response to the alarm event. The television system includes a beam splitter, sensors television signal, the power generation and switching unit, connected between themselves and with motion detector and visual display unit in such a way as to ensure the formation of the enlarged image zone violations in instant response to the alarm message. 2 C.p. f-crystals, 3 ill.

The invention relates to a television technique and can mainly be used in control systems, surveillance and detection of dynamic objects, as well as in other devices the TV automatics.

The closest to the technical nature of the proposed solution is a closed-circuit television system /1/ containing successively the market and visual display device (ICD). The circuit composition of an automatic alarm system includes a generator strobe moved by the operator on the screen internals in the area of increased interest. The video signals of two consecutive frames allocated using the strobe, wind up in the appropriate storage device (memory) and compared by the comparator. When the difference exceeds the threshold, are included alarm indicator and a recorder for recording a television signal. A TV camera is a tool of the same purposes as the sensor of a television signal, the circuit of the automatic alarm system is equivalent to the set of blocks that includes the selector pulses shaper signal frame and the motion detector; internals equivalent visual display unit.

The disadvantage of the prototype television systems is the limited capability operator in visual monitoring of the situation in the zone of disturbance after the automatic registration of moving small objects.

The invention aims to expand the functionality of closed-circuit television system by presenting the operator image zone violations on an enlarged scale with a minimum time delay response to alarming own the images zone violations in almost an instant reaction to a disturbing event.

This technical result is achieved by the fact that in the known device, containing the first lens, connected in series, the first sensor of a television signal, the clock selector and driver signal frame, and the motion detector and visual display unit, entered the beam splitter, the second sensor of a television signal, the power controller designed for spatial positioning a second sensor of a television signal and comprising a first actuator, kinematically associated with the first position sensor, and the second drive kinematically associated with the second position sensor, and the output of the first position sensor is the first output block controller and the output of the second position sensor, the second output unit controller and the switching unit, and the first lens optically connected to the input of the beam splitter, a first output which is the output of a normal optical image and optically connected with photomixing first sensor of the television signal and the second output of the beam splitter is output increased optical image and optically connected with photomixing second sensor of a television signal; wihak 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 a television signal, the third information input of the switching unit connected to the first output driver signal frame, the first control input of which is connected to the first output block controller and the second control input of the shaper signal frame to the second output of the power controller and the second output of the motion detector is the output of the signal “alarm”, and the second input motion detector input signal “alarm reset” TV system, the first input of the fission detector connected to the output of the switching unit, and the input video block to the first output of the motion detector, or alternatively the first input of the motion detector connected to the output of the second sensor of the television signal and the video input block to the output of the switching unit.

Signs of a television system, expressed alternatively, when the first or second alternative choice in conjunction with other features of the proposed solution provide the same technical result.

In addition, the feature of TV system is that the beam splitter contains pakkala and the second lens, moreover, the input of the beam splitter optically connected with translucent mirror, the first output beam splitter to the second lens and the second output of the beam splitter is formed an enlarged optical image obtained as transmitted light translucent mirror.

Given the lack of sensitivity of the second sensor of a television signal and(or) the lighting of the area to be protected to preserve the technical result in the television system may be a source of light, the pattern of which corresponds to the corners of the field of view of the sensor of the television signal.

Comparative analysis with the prototype shows that the proposed television system characterized by the presence of new units, including the beam splitter, the second sensor of a television signal, block laying and the switching unit, and the presence of new relationships, including alternative, between the newly introduced and the rest of the blocks. It is also proposed closed-circuit television system with connection to a given set of light source and its relations with other units of the system. The combination of all these signs is not known from the prior art, therefore, the claimed solution appropriate the pout sensor of a television signal, using a second sensor of a television signal produces a larger image part. Therefore, small objects are passed by a sensor of the second sensor as the medium and large size due to the increase in area inMtimes, where KM- the multiplicity scaling. As the observation operator zone violations by a signal of the second sensor, the image quality is in part transmitted details (details) will be higher. During this time delay the appearance of enlarged image relative to the moment of automatic registration of the offender is virtually absent, i.e. there is almost instant response to the alarm event. Consequently, the technical result and the methods of its achievement of the proposed solution meets the requirement of inventive step.

In Fig.1 shows a block diagram of the inventive closed-circuit television system, with a conditional switch 12 in position 1-2 and, respectively, in position 1-3 defines an alternative connection between the blocks; Fig.2 shows a possible block diagram of the switching block 10 of Fig.3 shows a screen videocontroller system (see Fig.1) contains the first lens 1, connected in series, the first sensor 2 of a television signal, the clock selector 3 and driver 4 signal frame, and the detector 5 movement, visual display unit 6, a beam splitter 7, the second sensor 8 television signal supplied to movement of the moving unit 9 guidance designed for spatial positioning of the second sensor 8 television signal and comprising a first actuator 9-1, kinematically associated with the first sensor 9-2 position, and second drive 9-3, kinematically associated with the second sensor 9-4 provisions thus the output of the sensor 9-2 position is the first output unit 9 guidance, the output of the sensor 9-4 position, the second output unit 9 guidance, as well as the switching block 10, and the first lens 1 is optically connected to the input of the beam splitter 7, the first output of which is output normal optical image and optically connected with photomixing second sensor 8 television signal, the output of which is connected to the first information input unit 10 of the switching control input of which is connected to the second output of the detector 5 of the motion, the second information input unit 10 switching Podkolzin to the first output of the shaper 4 signal frame, the first control input of which is connected to the first output unit 9 guidance, and the second control input of the shaper 4 signal frame to the second output unit 9 guidance, the first 9-1 and 9-3 second actuators which third and fourth outputs carry out the positioning of photomeson second sensor 8 television signal horizontally and vertically in the image plane of the first lens 1 and the second output of the detector 5 movement is the output of the signal “alarm”, and the second input of the detector 5 motion input signal “alarm reset” the TV system (see switch 12 in Fig.1 in position 1-2) the first input of the detector 5 movement is connected to the output of the switching block 10, and the input of the television monitor unit 6 to the first output of the detector 5 movement, either (see the switch 12 in Fig.1 in position 1-3) the first input of the detector 5 movement is connected to the output of the second sensor 8 television signal, and the input of the television monitor unit 6 to the output unit 10 switching.

A beam splitter 7 (see Fig.1) contains consistently spaced and optically coupled translucent mirror 7-1, a collective lens 7-2 reflecting mirror 7-3 and the second lens 7-4, and the input of the beam splitter optically connected with field formed enlarged optical image, obtained in transmitted light translucent mirror 7-1.

To preserve the technical result of the low sensitivity of the second sensor 8 television signal and(or) the lighting of the protected area system is added to the source 11 of the illumination (see Fig.1), the pattern of which corresponds to the corners of the field of view of the sensor. As sensors 2 and 8 of the television signal can be used module M12-24-5053 /2, S. 9/ firm “EMU” (G. S.-Petersburg), made on a printed circuit Board with dimensions 2424 mm, But for reasons of achieving the required sensitivity, it is preferable to use as the sensor 2 other chamber module of this company, namely M12-40-55IN with "night" mode, which provides a 10-fold gain in sensitivity /2, S. 9/.

The detector 5 movement is intended to register the change in the image signal supplied to its first input. This signal is consistent with a 75 Ohm load, is transmitted to the first output of the detector 5 movement. The second output of the detector 5 movement formed a logical alarm signal is active low, i.e. in the form of the following combinations of levels:

- armenini input video signal and after the termination of these changes.

Restore the original "1" at the second output of the detector 5, the motion is performed by feeding at its second input the command "reset alarm".

The detector 5 can be used in a television image analyzer ATI-9, developed in the research Institute of industrial television Raster /3, s 15/. ATI-9 performs the splitting field image at 1024 elementary zone analysis (32 zones horizontally and 32 zone vertically), each of which will detect changes in the brightness of the image and is the conclusion on the threshold of change. Elementary zone or so-called single control zone consists of eight lines by 16 pixels in row (168 image pixels).

As photodetectors in said chamber models module uses a matrix of charge-coupled devices (CCD) with the target format 1/3 inch and with a number of discrete items, this square 500(H)576(U).

Assume that the first lens 1 used Russian lens Jupiter-37M", as the second lens 7-4 - domestic lens "T-55", and as sensors 2 and 8 above chamber modules.

Objectlibrary format (3624) mm in the plane of photomeson sensor 2. Translucent mirror 7-1 and a reflecting mirror 7-3 provide the necessary direction of the optical transfer, and the collective lens 7-2 eliminates possible distortion during the transfer. As a result, the first output of the beam splitter is formed normal to the optical image of the object of control. On the other hand, in the image plane format (3624) mm, obtained in transmitted light at the output of the semitransparent mirror 7-1, is photomixing sensor 8. Therefore, the sensor 8 registers an optical image of fragment sizes determined by its photomixing (4,83,6) mm Thus, the second output of the beam splitter is formed an enlarged optical image of the inspection object with a magnification scale is equal to the relation

ToM=24/3,6=36/4,8=6,6.

The field of view horizontally 2Gsensor 2 is determined by the relation

where f is the focal length of the lens Jupiter-37M" equal to 135 mm

Therefore, 2G=15,2 hail.

The field of view horizontally 2gsensor 8 definition>admiravel 4 is designed to receive the signal of the rectangular frame of positive polarity with the format (ab)

where a is the size of the frame horizontally,

in - frame size vertically.

The frame dimensions and the dimensions of the raster X and Y are connected by dependency

a=X/Km,

in=Y/Km,

where X is the size of the raster horizontally,

Y - size of the raster vertically.

It is advisable to ensure the formation of a signal frame in block 4 digitally without the use of odnovorov avoid temperature errors. In the inventive solution the frame, having a thickness (1...2) item/line, can move across the raster. The current position within the raster is determined by the values of the constant offset applied to the input of the corresponding analog-to-digital converters (ADC) and regulated separately resistor dividers. The last set in block 9 of the guidance, are the control frame and the position sensors horizontally and vertically.

Block 9 of the guidance is designed to implement the spatial positioning of the second sensor 8 television signal. Unit 9 guidance (see Fig.1) contains the first gear 9-1 horizontal movement, nematicide associated with the second sensor 9-4 provisions.

The position sensors 9-2 and 9-4 can be made on the basis of variable resistors having a linear dependence of the resistance changes of the angle of rotation.

Let the position sensors 9-2 and 9-4 - potentiometers RPHand RPUwhen putting all the provisions of these engines resistor block 9 should provide a position sensor 8 relative to the second output of the beam splitter 7 to projected on photomixing enlarged optical image was centered horizontally and vertically. Note that the spatial guidance of the second sensor 8 television signal can be manual or motor using electric motors. In the second case, the control input unit 9 signal external control (Fig.1 is not shown).

The clock selector 3 is designed to discharge from a complete television signal produced at the output of the sensor 2, the pulses of the horizontal and framerates. The technical solution of the selector is known (see,for example, /4, S. 150-156/).

The switching block 10 (see Fig.2) contains a series-connected first buffer unit 10-1, the mixer 10-2 and the first switch 10-3, and also consistently included the second buffer is the second input to the mixer 10-2 is connected to the output element And 10-6, the first input of which is connected to the control input of the switch 10-5 and, respectively, to the input element And 10-7, the output of which is connected to the control input of the switch 10-3, and the input unit 10-4 is the first information input unit 10, the input unit 10-1 - second information input unit 10, the second input element And 10-6 third information input unit 10, the input element "NOT" 10-7 - managing unit 10, while the output switch 10-3, combined with the output switch 10-5 connected to the input of the buffer unit 10-8, the output which is the output of the block 10.

The switching circuit block 10 is carried out by feeding on control input logic signals:

a) the level of logical "1" in the mode "Select the protected object and situation analysis;

b) the level of logical "0" in mode "Alarm".

Switches 10-3 and 10-5 can be made on the basis of managed keys chip KRKN /5, S. 447/, the inclusion of which is feeding on their control inputs of the logic signal "0".

The source 11 of the light intended for the implementation of the artificial illumination of the area to be protected in the conditions when the natural light is insufficient to provide the necessary sensitivity of the sensor 8.

< to be made on the basis of an infrared emitting diode, the pattern of which corresponds to the corners of the field of view of the sensor 8.

Closed-circuit television system operates as follows. Click to highlight the work of the claimed system two modes:

"The selection of the protected object and situation analysis" (mode 1);

"Alarm" (mode 2).

Regardless of the mode of operation of the television system of the optical image along an optical path: the first lens 1, a semitransparent mirror 7-1, a collective lens 7-2 reflecting mirror 7-3, the second lens 7-4 projected onto photomixing first sensor 2. At the same time increased (in accordance with the ratio scaling ToMthe beam splitter) slice of this image on another optical path: the first lens 1, a semitransparent mirror 7-1 projected onto photomixing second sensor 8.

In the photoelectric conversion of the optical image of each of the sensors triggers the formation of the video. Further, both of these video signals are converted to outputs of the sensors 2 and 8 in parallel to the existing full television signals. The selector 3 selects from the complete television signal generated at the output of the sensor 2, lowercase and personnel sync.

Regardless of the mode of operation �/chr/215.gif">in). Recall that the position of the frame within the active portion of the raster is determined depending on the position of the sliders of potentiometers RPHand RPU(position sensors 9-2 and 9-4) specified in block 9 of the guidance. Simultaneously, the sensor 8 generates a television signal optically enlarged "vnutriramochnym" image.

Suppose that frame notes on the image area of increased interest for the operator, and the detector 5 movement provisioned, i.e., the selected protected area (see the dotted line around the perimeter of Fig.3A). Let then the detector 5 is initialized, i.e. set the analysis mode changes the input video signal in the selected area.

In mode 1 it is assumed that the protected zone is a moving object (s) are missing. Therefore, the second output of the detector 5 movement is a logical "1". Logical "1" is fed to the control input of the switching block 10, and the mixer 10-2 mixes the video signal of the "normal" image supplied to the second information input unit 10, a signal of a rectangular frame supplied to its third information input. The switch 10-3 is set in the closed state, because its control input valid signal logitechvideotray unit 6 reproduces the "normal" image "imposed" on him frame (see Fig.3A).

Let's further say that at some point in the protected zone is the offender. Then the detector 5 movement depending on the alternative connection of the first input register change signal or the output of the sensor 2 or the output of the sensor 8 and the second output of the detector 5 will be a logic level "0". Television system switches to mode 2 operation. When this switch 10-3 is opened and the switch 10-5 closed, because the control input of the latter is set to a logical "0".

As a result, the output of block 10 of the switching signal is formed of the enlarged image of the protected area, which is then either transit through the detector 5, or directly applied to the input of the television monitor unit 6.

On the screen of the television monitor unit 6 is played "open" on the whole raster vnutriramochnym image with a magnification of the zoomM(see Fig.3b). Note that regardless of the alternative connection of the enlarged image appears with minimal delay, i.e. almost instantaneously compared to the time of automatic registration of the offender, which is extremely valuable for closed-circuit television systems.

After acceptance by the operator of the Jena again in mode 1 operation. For this operator by means of exposure to the second input of the detector 5 is forcibly reset the alarm.

If your television system additionally introduced source 11 of the light, her work is absolutely the same, except that with the help of source 11 is artificial illumination of the area to be protected to ensure the required signal-to-noise ratio from the output of the sensor 8.

Perform engineering calculations of the positive effect of the inventive closed-circuit television system.

Let us assume the initial conditions that the minimum size of a human intruder is at a height h=1.5 m, and width l=0,3 m

Let the first input of the detector 5 movement is connected to the output of the switching block 10, i.e., the detector analyzes changes of the video signal from the output of the first sensor 2. Suppose also that the detector 5 contains 1024 single zone control, i.e., 32(N) 32 (). Then the horizontal size In the protected space by a human intruder can be calculated by the ratio of

B=320,3=9,6 m

The distance S from the input lens I to a human intruder define by the formula

where

The size of the observed zone violations B1in mode 2 operation of the television system will be

B1=S2tgG,

whereG- half of the angle to the horizontal of the sensor 8, in our example,G=1 deg.

In the B1=1,25 m

To evaluate the image quality of the offender, playing declare the television system screen television monitor unit 6, we calculate the number of resolution elements mX, which rested on the width of the image of the person on the ratio of

where MX- the number of elements CCD horizontal sensor 8, in our example, MX=500.

Then mX=120 elements.

For the prototype the number of elementsdefined by the ratio of

will be 15 elements.

Therefore, in the inventive solution provides the gain in resolution in the horizontal direction in comparison with the prototype, is

This technical result is ensured for alternative podklyucheno image detector 5 movement may have reduced the number of individual zones of control horizontally and vertically. In our example, the required number of individual zones horizontally will be

Currently, all blocks of the proposed solutions developed or may be developed by the domestic industry, therefore, should be considered the present invention corresponding to the requirement of industrial applicability.

SOURCES of INFORMATION

1. Application of Japan, No. 2162890 MKI5N 04 N 7/18, G 08 In 13/196, author - Dominate Kenji, the applicant is a firm of Mitsubishi Denki K. K. Publ. in Abstract journal 24 "radio", joint volume No. 8, Moscow, 1992, S. 40, abstract UP.

2. Television camera company "EMU" 1999-2000, catalogue, 60 S.

3. Television surveillance and protection of 99, catalog, research Institute of industrial television "RASTER", 62 S.

4. Bulls R. E., signals C. M., Eisenhardt, A. Television, M.: Higher school, 1986

5. Digital and analog integrated circuits: a Handbook / edited by S. C. Jakubowski, Radio and communications, 1990

Claims

1. Closed-circuit television system, containing the first lens, connected in series, the first sensor of a television signal, the clock selector and driver signal frame, and the motion detector and videocodezone, designed for spatial positioning a second sensor of a television signal, and comprising a first actuator, kinematically associated with the first position sensor, and the second drive kinematically associated with the second position sensor, and the output of the first position sensor is the first output unit controller and the output of the second position sensor, the second output unit controller and the switching unit, and the first lens optically connected to the input of the beam splitter, a first output which is the output of a normal optical image and optically connected with photomixing first sensor of a television signal, and the second output of the beam splitter is output increased optical image and optically connected with photomixing second sensor of a television signal, 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 a television signal, the third information input of the switching unit connected to the first output driver signal frame, the first panel is of igala frame - to the second output of the power controller and the second output of the motion detector is the output of the signal “alarm”, and the second input motion detector input signal “alarm reset” TV system, the first input of the motion detector connected to the output of the switching unit, and the input video block to the first output of the motion detector, or alternatively the first input of the detector connected to the output of the second sensor of the television signal and the video input block to the output of the switching unit.

2. The system under item 1, characterized in that the beam splitter includes sequentially arranged and optically coupled semi-transparent mirror, a collective lens, a reflecting mirror and a second lens, and the input of the beam splitter optically connected with translucent mirror, the first output beam splitter to the second lens and the second output of the beam splitter is formed an enlarged optical image obtained as transmitted light translucent mirror.

3. The system under item 1, characterized in that the source of light, intended for realization of artificial illumination of the area to be protected to ensure the required sensitivity of the second sensor television the spine which corresponds to the angles of the specified sensor.

 

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FIELD: video surveillance.

SUBSTANCE: method includes video surveillance of controlled object state, while into television cable main of object high-frequency television modulated signal is sent, while to receive signal concerning state of S objects, each of which includes group of N video surveillance blocks, including camera and microphone, video-audio signals from each group of N video surveillance blocks are combined along low frequency, received complex video signal is converted from each group of N video surveillance blocks into high-frequency television modulated signal and it is synchronized with unified cable main - coaxial television cable, in arbitrary groups combination, via which received independent S signals are sent to input of visualization and/or recording systems.

EFFECT: higher efficiency.

3 cl, 2 dwg

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EFFECT: higher efficiency.

2 cl, 3 dwg

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2 dwg

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6 cl, 6 dwg

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6 cl, 4 dwg

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EFFECT: division of digital video data outputted by several sources.

5 cl, 9 dwg

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