SU1631750A1 - Device for spot center coordinates measurement - Google Patents

Abstract

The invention relates to a television measuring technique and can be used in television automatic systems for measuring the coordinates of the center of the image of objects on a television raster. The purpose of the invention is to expand the functionality of the device by determining the coordinates of the contour figure. The device contains counters 1-3 pulses, multiplexers 4 and 5, a generator of 6 pulses, a threshold unit 7, T-flip-flops 8 and 9, D-flip-flop 10, And 11, 12 and 15 elements, RS-flip-flop 13 and delay element 14. This embodiment of the device provides for the determination of the vertical and horizontal coordinates of the center of the image of a spot on a television raster within one half-frame. 1 il. but

Description

The invention relates to a television measuring technique and can be used in television automatic systems for measuring the coordinates of the center of an image of an object on a television raster.

The aim of the invention is to enhance the functionality of the device by determining the coordinates of the contour figure.

The drawing shows the electrical structure of the device for measuring the coordinates of the center of the spot.

The device for measuring the coordinates of the center of the spot contains the first, second and third counters 1-3 of pulses, the first and second multiplexers 4 and 5, the generator 6 of pulses, the threshold unit 7, the first and second T-triggers 8 and 9, D- the trigger 10, the first and second elements And 11, 12. RS-trigger 13, the delay element 14 and the third element And 15.

The device works as follows.

The Bonar decomposition of the video signal received at the first input of the device from the output of the television camera is performed using threshold element 7, and synchronization is performed using the D flip-flop 10, the C-input signal receives the pulse signal of the clock frequency from the generator output 6 pulses, and on the D-input - a pulse signal from the output of the threshold element.

At the second input of the device, the pulse of the initial installation arrives at the beginning of each half-frame and zeroes the counters 2, 3. The third entrance of the device receives a pulse at the beginning of each line. To the second and third inputs of the device, respectively, frame and line damping pulses can be applied.

From the beginning of the half-frame until the appearance of the video pulse at the output of the D-flip-flop 10, the first output of counter 2 sets the level of the logical unit corresponding to the contents of counter 2 equal to zero.

If there is a high level at the first output of the counter 2, the pulses from the third input of the device, through the element 11, arrive at the R input of counter 1 and zero it at the beginning of each line. At the C-input of the counter 1 through the multiplexer 4 receives a pulse signal of the clock frequency

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from the generator output 6 pulses, and to the C input of the counter 3 via multiplexer 5 - pulses from the third input of the device.

As a result, counter 1 counts the clock pulses in each row again, and counter 3 counts the rows in the current half frame.

Upon receipt of the first video pulse (corresponding to the upper contour boundary of the figure) formed at the output of the D-flip-flop 10, the C input of the counter 2, which counts the video pulses in the current half-frame, at the first output of the counter 2 sets the level of logical zero, and at the second output - the level of the logical unit corresponding to the contents of counter 2, equal to one.

As a result, the C input of the counter 1, in the presence of the first video impulse at the output of the D-flip-flop 10, through the element 12 and multiplexer 4, receives a pulse signal from the output of the t-flip-flop 8, which divides into two the number of pulses generated at the generator output 6 pulses .

At the end of the first video impulse, the zero-level signal from the output of D-flip-flop 10 prohibits the passage of pulses from the output of D-flip-flop 8 through element 12 before the second video signal arrives. When the second and subsequent video pulses arrive at the C-input of the counter 2, a logic zero level is established at its second output and remains. In this case, the And 12 element does not let the signal from the output of the T-flip-flop 8 to the C input of counter 1, but the Element 11 does not pass pulses from the third input of the device to the R input of counter 1 after the first video impulse arrives.

Thus, at the output of the first counter 1, a clock counting result code is generated to generate the first video pulse and one after the first video pulse in the line in which the first video pulse (horizontal coordinate of the image center of the spot on the television raster) appears.

The vertical coordinate is determined as follows.

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Until the first video pulse appears, the C input of the counter 3 enters each pulse from the third input of the device, passing through multiplexer 5 is provided by the unit level supplied to its control input from the first output of the counter 2.

The first video impulse arrives at the first input of an AND 15 element, which is allowed by the second input by a signal from the zero output of the RS flip-flop 13, which is set to the initial zero state by each pulse arriving from the third input of the device. Delayed by element 14 of the delay at a time equal to the duration of the clock pulse, the first video impulse arrives at the S input of the RS flip-flop 13, sets it to the one state and thereby prohibits further passage of the video impulse through the element 15. the first video impulse on the line generates a pulse of clock duration, which is fed to the input of the T-flip-flop 9. Element And 15 remains prohibited until the next pulse arrives from the third input of the device, therefore for the first as for the following The x lines included in the formation of the outline of the figure, at the output of the element 15 will form a single impulse. The sequence of these pulses arrives at the T input of trigger 9, dividing their number by two. The pulses from the output of the T-flip-flop 9 through multiplexer 5, on the control inputs of which, after the arrival of the first video impulse, the zero-level signal from the output of counter 2, are fed to the C input of counter 3.

Thus, at the output of the counter 3, a result code of counting all the lines is formed to the occurrence of the first video pulse in the line and one after the presence of video pulses in the lines (vertical coordinate; the center of the image of the spot on the television raster).

Measurement of the coordinates of the center of the image of the contour figure on the television

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The common raster is performed within one half frame.

Claims (1)

Invention Formula A device for measuring the coordinates of the center of the spot, containing a series-connected threshold unit whose input is the first input of the device for measuring the coordinates of the center of the spot, D-flip-flop, the first pulse counter, the first And element and the second pulse counter, the outputs of which are the output of the device for measuring the coordinates of the center of the spot, a pulse generator connected in series, the first T-flip-flop, the second element AND, to the second and third inputs of which the first input and the second output of the first the counter and the first multiplexer, to the second input of which the second input of the D-flip-flop and the output of the pulse generator are connected, and the output is connected to the counting input of the second pulse counter, and the second T-flip-flop connected in series, the second multiplexer and the third pulse counter, the outputs of which are the second the output of the device for measuring the coordinates of the center of the spot, while the combined second inputs of the first and third counters are the second input of the device for measuring the coordinates of the center of the spot, the third input of which is It is the second input of the second multiplexer and the second input of the first AND gate, and the control inputs of the first and second multiplexers coupled to the first output of the first pulse counter, characterized in that, in order to expand functional device capabilities, by determining the coordinates of the contour figure, a serially connected delay element, an RS flip-flop and a third AND element, the output of which is connected to the input of the second T-flip-flop, and a second input connected to the input of the delay element and the first output of the D-flip-flop, the second input of the RS flip-flop is connected to the third input of the device for measuring the coordinates of the center of the spot.