SU1640722A1 - Device for sensing and counting of objects image number - Google Patents

Abstract

The invention relates to the field of automation, in particular to a device for reading and counting images of objects. The purpose of the invention is to increase the reliability of the device. The goal is achieved by eliminating situations of simultaneous arrival of pulses at the inputs of a reversible counter, which is ensured by the introduction of three single vibrators and the OR element. 1 il.

Description

The invention relates to automation, in particular, to a device for reading and counting the number of images of objects.

The purpose of the invention is to increase the reliability of the device.

The drawing shows the block diagram of the device.

The device contains a scanning unit 1, made in the form of a television sensor 2 and a sweep generator 3, comparator 4, element AND 5, first 6., second 7 and third 8 one-shot, reversible counter 9, element OR 10, first 11 and second 12 delay elements .

The device works as follows.

The generator 2 of the sweep unit 1 generates a sync pulse Starting a frame that is fed to the input of the one-shot 6. forming a short pulse with parameters that ensure reliable operation of the reversible counter, which through the element OR 10 is fed to the addition input

reversible counter 9. Thus, at the start of the scan, 1 is recorded in the counter.

Television sensor 2 converts the light image of the observed objects into a video signal, which enters the Comparator Prokvantovznny input into two values 1 and O, the unit level corresponds to the background and the zero level corresponds to the object in the image, the video signal enters And 5 and one-shot input 8, which forms a short pulse with parameters that ensure reliable operation of the reversible counter, corresponding to the pulse of the video chords of the background image, which is fed to you the read input of the reversible counter 9. The delay element 11 has a delay time equal to the length of the scanning line, so the background video hord pulses arrive at the inputs of the And 5 element simultaneously. If the chords of adjacent lines overlap

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(have a common area), then the output of the element And 5 is a signal arriving at the input of the one-shot 7, forming a short pulse with parameters that ensure reliable operation of the reversible counter, which is fed to the input of the delay element 12, where it is delayed by the time corresponding to switching counter 9. This is necessary in order to eliminate the simultaneous appearance of pulses at both inputs of the reversing counter 9,

From the output of delay element 12, a pulse is applied through the element OR 10 to the summing input of counter 9, at the output of which the number of images of objects is formed.

Claims (1)

The invention of the device for reading and counting the number of images of objects containing a scanning unit, the first output of which is connected to the information input of the comparator, the output of which is connected to the input of the first delay element, the OR element, one input of which is connected to the output of the second delay element, and the output connected to A summing input of a reversible counter, the output of which is an information output of the device, characterized in that, in order to increase the reliability of the device, it contains the first one-shot, the input of which is connected to the second output of the scanning unit, and the output is connected to another input of the OR element, the second one-shot, the output of which is connected to the input of the second the delay element, the element And, the inputs of which are connected to the outputs of the first delay element and the comparator, and the output. is connected to the output of the second one-shot, and the third one-shot, whose input connected to the output of the comparator, and the output is connected to the subtractive input of the reversible counter.