SU949335A1 - Device for measuring non-transparent flat figure area - Google Patents

Description

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

one

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

A device for measuring the area of opaque flat figures is known, comprising a conveyor, a source of light and optical lines, a switch of light lines consisting of a stator, a rotor and an alternate signal reception sensor, a square photo sensor, a row sensor and a square counter.

In this case, the switch is connected to the measuring shaft of the high-speed mechanical overdrive device, thereby achieving synchronization of reading the scan line by the optical switch and moving the measured skin to the line width p.

The disadvantage of the device is the presence of high-speed overdrive transmission with a large gear ratio, which leads to measurement errors due to backlash in the transmission links, the value of which is proportional to the gear ratio. The error is especially large at the moment the measured skin enters the feed rollers when it is braked.

To form counting pulses, a set of light lines is used, equal in number to the main set of measuring light lines. In addition, since the location of the optical switch in the device is determined by the layout and design of the overdrive, this leads to an increase in the length of the optical conduits and a decrease in the level of the useful signal, i.e. to reduce the accuracy of measurements.

The purpose of the invention is to improve the measurement accuracy. The goal is achieved by the fact that the device is equipped with an estimated sensor of light wires in a row, a light guide meter in a row, a decoder, a first electronic key and an output register connected in series by the second and third electronic keys, the output of the latter connected to the square counter input, the output of which is connected to the second input of the output register, the first and second trigger, the first input of the first trigger is connected to the output of the line sensor, and the second input - to the output of the second electronic cell The second electronic key, the third electronic key and the light guide counter in the row are connected to each other, the inputs of the second electronic key are connected respectively to the area photosensor and the light guide count sensor in the line, the decoder output is connected to the second input of the first trigger, the row sensor is connected to the driven shaft of the conveyor, and the light switch is made with an independent rotor drive. The drawing shows the block diagram of the device. The device consists of a conveyor 1 moving the measured figures, for example skin 2, towards the feed rollers 3, the sensor k of the row connected to the flexible shaft 5 of the conveyor 1, the light source 6 installed above the conveyor 1, the light guides 7 mounted under the conveyor 1, the ends of which are arranged in the form of a ruler perpendicular to the direction of movement of the measured skin 2, the switch 8 of the wires, consisting of a stator, a rotor I1 sensor of alternate reception of signals, an independent drive 9 of the rotor switch 8 light lines, area photosensors 10, connected by a sensor Hdv sensor - 11 counting light lines in a row, counter 12 light lines in a row, decoder 13, first electronic key 14 and register 15, output, connected in turn to the second and third electronic keys 16 and 17 and a counter 18 square, the output of which is connected to the second input of the register. 15 of the output of the first and second triggers 19 and 20. The output of the first trigger 19 and the inputs of the counter 12 light lines in the row, the third electronic key 17 and the second trigger 20 are interconnected, and the inputs of the second electronic key 16 are connected respectively to the area photosensitive sensor 10 and sensor 11 light lines in a row. The device works as follows. The string conveyor 1 transfers the skin to be measured 2 to the feed rollers 3, which feed the leveled skin 2 into the measurement zone to the installation site of the line of light guides 7 forming the area scanning line. When skin 2 moves, part of the light guide 7 is shaded by the skin. The switch 8 of the light guide with the actuator 9 sequentially interrogates the light guide 7 by means of an alternate signal reception sensor mounted in it in the form of a rotating central light guide, against the axial end of which a photosensor 10 is installed. scheme The sensor 4 lines, mechanically connected with the conveyor 1, generates pulses with a frequency equal to the time of movement of the measured skin 2 to the width of one line. The autonomous drive 9 of the optical switch 8 is selected so that the polling time of the light lines 7 of the area sweep line is shorter) and the movement of the measured skin 2 by the width of the line. Due to this, an asynchronous interrogation of the light lines 7 in the area sweep line is achieved when the measured skin 2 is transported synchronously with the conveyor 1 line-by-line scanning of the area. According to the signal from the sensor k, the string trigger account control 19 is set-. It is set to a single position, at which the setting signal from the counter of 12 light lines per line is removed and the key 17 is disabled from the key 17 of the square counter 18, and the trigger 20 is set to the single position. The pulses from sensor 11 of the pipelines fill the counter 12 pipelines in a row and through the keys 16–17 enter the counter input of the area counter 18. With this impulses

8, the area counter 18 arrives only when the switch 8 polls the 2 light lines 7 shaded by the skin being measured. in the absence of signals from the photo sensor 10. The activation of the sensor 11 of the count of the light lines is synchronized with the interrogation of the light lines 7 by the switch 8.

When 12 light lines in a row are formed in the counter, equal to the total number of light lines 7, the output of the decoder 13 light lines in the line receives a signal at the zero input of the account control trigger 19. The signal from the trigger control trigger output 19 sets the light conduit counter 12 in the row to the zero position and closes the key 17 of the area counter 18 - the row is read, and in the area counter 18 there is a code of the number of shaded light conduits 7 in the read row.

After moving the measured skin 2 to a distance equal to the width of the line, the sensor A of the line outputs the next pulse to the account control trigger 19 and the line reading process is repeated, etc., and in the area counter 18 the results of skin area are summed up 2

After each pulse of the sensor C in the row of the account control trigger, the trigger 20 sets to the unit position at which the key 14 is opened, but the first received counting pulse from the key 16, the trigger 20 returns to the zero position. Only after the passage of the entire measured skin 2 above the installation line of the light lines 7, the output trigger 20, which is installed in a single position, remains in this state, since the counting pulses — from the key 16 — do not arrive during the counting time of 12 light lines in the row, i.e. before the decoder outputs 13 the number of light lines in the pulse string to the control input of key 1. When a pulse is received from the decoder 13, the number of light lines in the string, the code of the number of the measured skin area 2 is copied to the output register 15 to control the operation of the indicator 1 and print the skin area.

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Thus, the absence in the device of a complex high-speed upward transmission to the switch of the optical lines, the use of the described 5 signal processing scheme and the supply of the switch with an autonomous drive increase the accuracy of measurements. The economic effect of using one machine is 10 11.5 thousand rubles. in year.

Claims (1)

Invention Formula Area measuring device , 5 opaque flat figures containing a conveyor, a light source and light lines, a light line switch consisting of a stator, a rotor and an I sensor alternately 2Q NO; signal reception, photo sensor 1, optically coupled to the light conductor switch, a row sensor and an area counter, characterized in that, in order to improve the measurement accuracy, it equipped with a series-connected sensor for counting light lines in a row, a light meter counter in a line, a decoder, the first electronic switch and output register connected in series by the second and third electronic keys, the output of the latter is connected to the input of an area counter, the output of which is connected to the second; The first input of the output register, the first and second trigger, the first input of the first trigger is connected to the output of the row sensor, and the second - with the output of the second electronic key and the input of the third electronic key, the second inputs of the second trigger, the third electronic key and the light conductor counter in the line are interconnected , the inputs of the second electronic key are connected respectively to the photo sensor of the area and the counting sensor of the light lines in the row, the output of the decoder is connected to the second input of the first trigger, the co-op sensor of the string. dinen with a driven shaft conveyor 5 and the switch of the optical lines is made with an autonomous drive of the rotor. Sources of information taken into account in the examination 1. Patent Czechoslovakia Vf 26S6, 55 cl. G 01 -19/30 1971 (prototype). / (i cmpotJcmSv indie / (ania u / 7 € va / nu