SU1697275A2 - Device for detecting moving objects - Google Patents

Abstract

The invention relates to a television tec and can be used to detect moving small objects on a fixed background. The purpose of the invention is to determine the time of detection of the object and its coordinates. The device comprises a transmitting television camera 1, a launch input 2, a threshold unit 3, elements AND 4 and 5, a memory unit 6, an element OR 7, D-flip-flops 8-10. 11 pulse generator, shaper 12 lowercase and personnel pulses, dividers 13 and 14 frequencies, counters 15-1S. memory unit 20 and delay element 21. When searching through a scan, its coordinates and the time of detection are recorded in the RAM block 20. 1 il.

Description

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The invention relates to a television technique, can be used to detect moving small objects on a fixed background and is an improvement to the device by author. No. 1385331.

The purpose of the invention is to determine the time of detection of the object and its coordinates.

The drawing shows an electrical block diagram of a device for detecting moving objects.

A device for detecting moving objects contains a transmitting television camera (PTC) 1, start input 2, threshold unit 3, first 4 and second 5 elements AND, memory block 6, element OR 7, first 8, second 9 and third 10 D-triggers , pulse generator 11, shaper 12 lowercase and personnel pulses, first 13 and second 14 frequency dividers, first 15, c) rear 16, third 17, fourth 18 and fifth fifth 19 counters, main storage unit 20, delay element 21,

A device for detecting moving objects operates as follows.

In the initial state, the first 8, second 9 and third 10 D-flip-flops that form the shift register are in the zero state, the first 15, the second 16, the third 17, the fourth 18 and the fifth 19 counters are cleared, the generator 11 is off, block 20 is in the initial state.

When switched on, a generator 11 is started, from the output of which sampling pulses with frequency f0 are fed to the input of the imaging unit 12 horizontal and personnel pulses, to the input of the second frequency divider 14 and to the input C of memory block 6. Lower pulses from the first output of the imaging unit 12 are fed to the input of the first frequency 13 frequency, to the input R (setting) of the second lock 16, to the first input of the PTC 1 and to the input zeroing of the fourth counter 18, it has encircled it. The frame pulses from the second output of the imaging unit 12 are fed to the zeroing input of the third counter 17, wrapped it, to the input R (setting) of the first counter 15, to the second input of the PTC 1, to the counting input of the fifth counter 19, to the clock inputs of the first 8, second 9 and third 10 D-flip-flops. The pulses from the output of the first divider 13 frequency go to the counting input of the third counter 17, and to the counting input of the first counter 15. The pulses from the output of the second divide 14 frequency go to the counting input of the second counter 16 and to the counting input of the fourth counter 18.

When the PTC beam 1 moves along the row, the sampling pulses, coming through the second frequency divider 14 to the second counter 16, change the state of the latter every K2 pulses, where Ka is the division factor of the second divider 14. The string is thus divided into sections, each of which corresponds to a certain state of the second counter 16. The same happens when the beam moves during a vertical scan. The frame is divided into horizontal stripes using the first frequency divider 13, which has a division factor Ki, and the first counter 15. As a result, the entire raster is divided into rectangular sections, each of which corresponds to a certain state of the first 15 and second 16 counters and a certain cell 6 memory block. Moreover, during the sweep by sweep of the sweep of each such section, the address of the cell corresponding to this section is set at the address inputs of the memory block 6. The current value j (line number of the raster) from the output of the third pulse counter 17 is fed to the second input of block 20. The current value I (element number in the raster line) from the output of the fourth counter 18 is fed to the first input of block 20. The current value of g (frame number) from the output of the fifth counter 19 is fed to the third input of the block 20. The output signal of the PTC 1 is fed through the threshold block 3 to the second input of the first element 4 and to the first input of the second element 5.

The Start signal goes to the setup (S-input) of the first 0-flip-flop 8, sets it to the one state, and through the delay element 21 to enter the zeroing of the first counter 19, has wrapped it. The signal from the output of the first D-flip-flop 8 is fed to the information (D-input) of the second D-flip-flop 9. The next (first) frame sync pulse sets the second D-flip-flop 9 to one state and resets the first D-flip-flop to zero state 8, wrapped the third counter 17 and incrementing the current value of the fifth counter 19 by one. The high level signal from the output of the second D-flip-flop 9 passes through the OR element 7 to the recording control input and holds the memory block 6 in recording mode. At the same time, the information input of the memory block 6 is supplied with a logical O signal from the inverse output of the second D-flip-flop 9. This same potential blocks the operation of the second element 5, arriving at its fourth input. Therefore, the memory block b is cleared.

After the next (second) frame sync pulse arrives, the third D-flip-flop 10 switches to one state, and the second D-flip-flop 9 goes to zero. Simultaneously, the current value of the fifth counter 19 is incremented by one, and the third counter 17 is zeroed. The high level signal from the output of the third D-flip-flop 10 is fed to the first input of the first element AND 4 and permits the passage of pulses from the output of the threshold unit 3 through the first element 4 to the first input of the element OR 7 and then to the recording control input of the memory block 6. At the same time, the fourth input of the second element I 5 and the information input of the block b pee are supplied with a logical 1 signal from the inverse output of the second D-tr of the gage 9. Therefore, the logical 1 signal is recorded only in those cells of the memory block 6, which correspond to the raster sections containing an image of objects. Moreover, the second element (L 5 is blocked by a low-level signal from the inverse output of the third D-flip-flop 10.

After the next third frame sync pulse arrives, the third D-flip-flop 10 switches to the zero state and enables operation of the second element AND 5, since from the inverse output of the third D-trigger 10 a high level signal is supplied to the third input of the second element 5. At the same time at the input to the write control of the memory block 6, a low level signal is output from the element OR 7 and the memory block 6 operates in the read mode. At the same time, the current value of the fifth counter 19 is incremented by one, and the third counter 17 is zeroed.

After some time, from the output of the delay element 21, the reset input of the fifth counter 19 receives a delayed Start signal. and embraced him. Subsequent (starting from the fourth) frame pulses from the output of the former 12 lowercase and frame pulses do not change the state of the first 8, second 9 and third 10 D-triggers. Therefore, if in the field of view of the PTC 1 there is a small-sized moving object, after some sight, the value of which depends on the speed of movement of the object and the size of the raster dividing areas, the object moves from the section corresponding to logical 1 in the memory cell of memory 6 to the area with level zero. At this point, the high signal

from the inverse output of the memory block 6 is fed to the second input of the second element And 5 and permits the passage of pulses from the output of the threshold block 3 to the output of the second element 5 and further to the control input of the block 20, thereby writing to the block 20 the current values of g , j, i, characterizing the time and coordinates of the detection of a small sized moving object in the field of view of the PTC 1.

At the same time, the object detection time is

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Thus, in the proposed device, after a signal is triggered, if there is a moving small object in the field of vision of the PTC, it is detected and recorded in the block of coordinates and object detection time.

Claims (1)

Apparatus of the Invention A device for detecting moving objects is co-ed. No. 1385331, characterized in that, in order to determine the time of detection of the object and its coordinates, the third, fourth and fifth counters, the delay element and the flea of the main memory are added, the output of the first frequency divider connected to the counting input of the first counter, output which is connected to the first information input of the first memory block, the control input of which is connected to the output of the second element I, the output of the second frequency divider is connected to the input of the fourth counter, the output of which is connected to the second information the input of the RAM, the third information input of which is connected to the output of the fifth counter, the installation input of which is connected to the output of the delay element, the first output of the horizontal and frame pulses connected to the installation input of the fourth counter, the second output of the horizontal and frame pulses are connected to the installation input to the third counter and to the counting input of the fifth counter, and the input of the delay element is connected to the installation input to the unit state of the first D-flip-flop.