SU916978A1 - Device for measuring area of non-transparent flat figures - Google Patents

Description

(54) DEVICE FOR MEASURING THE AREA OF THE NON-TRANSPARENT PLANE FIGURES

The device relates to a measurement technique and be used to measure the area of flat shapes, for example leather goods.

A device used in measuring areas of irregular shapes is known, for example, animal cheek skins containing a conveyor belt, a conveyor pulse generator, an illuminator, a number of photocells, a signal processing circuit, and a pulse counter 1.

The disadvantage of the known device; The reliability of the measurement results is low and the AQCtototal of measurement results associated with false information of photocells in the event of their failure or dusting .;

Closest to the present invention is a device for measuring the area of opaque flat figures, comprising a conveyor, a light source and light lines, a light line switch consisting of a stator, a rotor and an alternate signal reception sensor, a photo area sensor optically coupled to the switch. rum light lines, sweep pulse generator, line sensor, information signal processing unit and display unit 2.

The drawback of the device is the low reliability of operation and the accuracy of measurement associated with the failure of the light-conducting channels due to the contamination of their ends.

The purpose of the invention is to increase the reliability and reliability of measurements.

The goal is achieved by the fact that the device is equipped with a rotor speed sensor of the light conductor switch and a light conduit assessment unit, the inputs of which rotor speed rotor of the light conductor switch, the sweep pulse generator and the area photosensor are connected, the outputs of the latter are also connected to the information signal processing unit.

  - 15

In addition, the unit for evaluating the validity of the light lines is made in the form of two RST-flip-flops, two delay elements, an RS-flip-flop, three AND elements and an UNEMATICAL element, the first delay element, the first And element, the RS-flip-flop and, the second And element are connected in series, R - the inputs of two RS-T-flip-flops are interconnected and with the S-input of the RS-flip-flop, the outputs of the RS-T-flip-flops are connected to the element NEURALITY, the output of which is connected to the first input of the third element And, the output of the latter is connected to the R-input RS -trigger, the second output of the first element for The holder is connected to the R-Trigger, the second delay element is connected between the second input of the third element And and the T-input of the second RS-T flip-flop, which is also connected to the second input of the second element And, the inputs of the delay elements and two RS-T-flip-flops are the corresponding inputs of the evaluation unit of the light conduits, and the first output of the first delay element and the second and third element I are its corresponding outputs.

FIG. 1 shows a block diagram of a device; in fig. 2 is a schematic diagram of the unit for determining the validity of light lines.

A device for measuring the area of opaque flat figures consists of a conveyor I, a source of light 2 located above it, a light conductor 3, installed perpendicular to the plane of the conveyor 1, and a switch 4 of light conduits. The lower ends of the light lines 3 are fixed on the switch 5 of the switch 4 of the light pipes, the latter also contains a rotor 6 and a sensor 7 for alternately receiving signals, a photo area sensor 8, a conveyor drive 9, a switch rotor drive 10, a sweep pulse generator 11, a sensor

12 rotations of the rotor switch sensor

13 lines connected with the conveyor 1, the information signal processing unit 14, the display unit 15. And the unit 16 for evaluating the validity of the light guides. The light conduit evaluation unit 16 includes two delay elements 17 and 18, two R-S-T-flip-flops 19 and 20, an R-S-flip-flop 21, three elements AND 22-24 and element 25 UNIMQUAL. The object to be measured is designated 26.

The device works as follows.

The conveyor 1 moves the measured object 26 to the measurement zone between the illuminator 2 and the light guides 3.

When moving, part of the light lines will be darkened by the measured objects 26. A square photosensor 8, through the sensor 7, receiving signals alternately, when the rotor 6 of the switch 4 rotates, it illuminates the ends of the light. topowers 3, fixed in the stator 5. Simultaneously with the survey of the optical lines 3, the formation of pulses by the generator 11 pulses of the sweep area. These pulses at the moments of interrogation by the photosensor 8 of the area of the darkened light lines 3 are summed up in the information signal processing unit 14. The frequency of reading pulses in this block is set by sensor 13 of the line.

The signal from the sensor 13 starts the summation of pulses from the darkened light lines 3 in one scanning line using the sensor 7 of alternately receiving signals.

The frequency of rotation of the switch rotor drive 10 is chosen such that the interrogation of all light lines 3 installed on the measurement line takes place in a time shorter than the period of signals from sensor 13 of the line. During the passage of the entire measured object 26 above the line of light lines 3

In the information signal processing counter of the unit 14, a measurement result is accumulated, which is fed to the display unit 15, where it is recorded using digital indicators.

The device for measuring the area of flat figures works in two modes: measurement and self-control (in the absence of measurement).

The beginning and end of the measurement mode are determined by the signals generated

d in the information signal processing AND block, the start of the measurement is recorded when there are signals from a certain number (for example, three) of the darkened light lines 3 in one scan line, and the end is due to the absence of signals from the darkened light lines 3 in the scan line.

The operation in the self-monitoring mode is ensured by introducing into the device a unit 16 for evaluating the validity of the light conduits allowing detection and

search for faulty (dusty) light lines 3.

In addition, with the help of the unit 16 for evaluating the validity of the light lines, a malfunction is detected in both the area photosensor 18 and the sweep pulse generator 11.

5 Block 16 evaluation of the validity of the light guide works as follows. For each revolution of the rotor 6, the sensor 12 turns of the rotor of the switch produces one pulse. Due to the time shift between the signals from the sensor 12 rotor turns and from the generator 11 of the sweep pulses, the signals from the sensor 2 follow ahead of the signals from the generator 11 (and, accordingly, the pulses from the area reading 18 of the photosensor).

The pulses from the sensor 12 turns of the rotor of the switch arrive at the delay element 17 and the processing unit 14, which in the self-control mode generates one pulse per rotor 6 turn, arriving at

 one of the inputs of the element And 22 processing the information signal of the block 16, and the duration of this pulse is more than Bpe ftei delay element 17 of the delay on the second output (Q2).

Claims (2)

$. The delay element 17 for the first output (Q1) generates a pulse setting to 0. The R-S flip-flop 21 (at the input R) and the counter of the information signal processing unit 14. The delayed pulse from the second output (Q2) of element 17 goes through element 22 to the installation S-input, RS-flip-flop 21, sets it to state 1. In addition, this pulse goes to the R-inputs of RS-T-flip-flops 19 and 20, set them in "O. Thus, at the beginning of each scan line, as determined by the operation of the sensor 12, is set to "O R-S-T-flip-flops 19 and 20, and." the O-processing counter of the information signal of block 14, as well as setting to "1 RS-flip-flop 21, which during each scan line is set to" 1, except for a short period of time determined by the difference between the delays on the outputs (Q2 and Q1) element 17 delay. If there are no faulty (dusty) optical lines 3 in the device, then the output of element 25 is UNIQUENESS at the moment of arrival of the pulse from delay element 18 is always a signal "O, which is fed through element 24 to the set R input of the RS flip-flop 21. Thus, reset in "O, previously installed (at the beginning of the line) in" 1 through S-BXO of the RS flip-flop 21 does not occur and the counter of block 14 periodically, once per turn of the rotor 6, is reset to "About after counting the number of pulses equal to the number of optical lines 3 from generator 11 through element 2 5. If in the device there appear irregular (dusty) light lines 3, then at the time of polling the dark light guide 3 by the photosensor 8, the RS-T flip-flop 19 is not set to a position equivalent to the position of the RS-T flip-flop 20, the input of which pulses are delivered from the sweep pulse generator 11. Therefore, the UNEQUALITY element 25 at the moment of arrival of the pulse from the delay element will generate the signal “1 applied to the R input of the RS flip-flop 21 through the element 24. This resets the RS flip-flop 21 to“ O and stops the further arrival of pulses from the generator 11 pulse sweep through the element And 23 to the input of the counter of the information signal processing unit 14. Thus, in the counter of the electronic unit 14, the number of the faulty (dusty) light guide 3 is recorded. At the same time, the signal "1 from the key output element 24 And goes to the display unit 15, where the number of the faulty (dusty) light line 3 is displayed. The signal" 1 from the output of the And element 24 also enters block 14, causing the termination of the formation of signals from block 14 to the element AND 22 of the unit 16 for evaluating the validity of the light guides, which is necessary to fix the malfunction that has occurred. A similar malfunction signal is recorded upon exit from the str - of the area sensor 8 or the sweep pulse generator 11. Thus, by supplying the device to the device with an evaluation unit of the light conduit providing continuous automatic monitoring of the optical system status of the device, the reliability of the device was improved, and due to the elimination of errors caused by spurious signals from faulty optical conduits, the reliability of the measurement results increased. Apparatus of the Invention A device for measuring the area of opaque flat figures comprising a conveyor, a source of light and optical lines, a switch of optical lines consisting of a stator, a rotor and an alternate signal reception sensor, an area photo sensor optically coupled to a switch of the optical lines, a sweep pulse generator, a sensor lines, information signal processing unit and display unit, characterized in that, in order to increase the reliability and reliability of measurements, it is equipped with a rotor speed sensor Switch optical fibers and light pipes shelf evaluation unit, which is connected to the inputs of the switch rotor speed sensor optical fibers, the sweep pulse generator and the photocell area past outputs are also connected to the processing unit of the information signal. 2. The device according to claim 1, characterized in that the evaluation unit of the light conduits is made in the form of two RS-T-flip-flops of two delay elements, an RS-flip-flop, three AND elements and an UNEMINABLE element, the first delay element, the first And element, RS- the trigger and the second element And are connected in series, the R-inputs of two RS-T-flip-flops are connected to each other and to the S input of the R, -S-flip-flop, the outputs of the RS-T-flip-flops are connected to the element UNEQUALITY, the output of which is connected to the first input of the third element And, the output of the latter is connected to the R input of RS pnrrepa, the second output G of the first delay element is connected to the RS trigger, the second delay element is connected between the second input of the third element AND and the T input of the second RS-T trigger, which is also connected to the second input of the second element AND, the inputs of the delay elements and two RS-T The triggers are appropriate, the inputs of the evaluation unit of the light conduits, and the first output of the first delay element and the second and third element I are its corresponding outputs. Sources of information taken into account in the examination L Patent of Great Britain No. 1421550, class G 01 B 11/28, 1976. 2. USSR author's certificate No. 168024, cl. G 01 B 9/00, 1964 (prototype). eleven "I 161 P 22 2f 23 I 25 24