SU1620838A1 - Device for measuring the area of opaque flat figures - Google Patents

Abstract

This invention relates to instrumentation technology. The purpose of the invention is to increase the reliability of the device by providing the capability, hardware verification and detection of faulty emitters and photodetectors. A device for measuring the area of opaque flat figures comprises an optically coupled ruler 1 of emitters and a ruler 2 of photodetectors, a sensor 6 lines connected to the conveyor 4, at the command of which the synchronization unit 7 controls the switches of the emitters and photoreceivers. The pulses from the output of the switch 10 photodetectors corresponding to the size of the object 3 on this line are summed up in the counter 11 pulses through the decoder 12 enter the display unit 13. Unit 14 control is designed to search for faulty emitters and photodetectors and their identification. 1 hp f-ly, 2 ill. (L re to about 00 from 00

Description

The invention relates to a control and measuring technique and can be used to measure the area of flat figures.

 The aim of the invention is to improve the reliability of the device by providing the possibility of hardware verification and detection of faulty emitters and photodetectors.

FIG. 1 shows a diagram of the device; in fig. 2 - control unit diagram.

The device comprises an optically coupled line 1 of emitters and a line of 2 photodetectors located on both sides of object 3 in such a way that at least some of the photodetectors are installed each in the path of radiation of several consecutive emitters, including at least one emitter, on the radiation path of which is installed an adjacent photodetector, a conveyor 4, designed to move the object 3 and moving in the direction perpendicular to the rulers 1 and 2 of the emitters and the photoreceptor conveyor drive 5, area sweep line sensor 6, mechanically coupled to conveyor 4, synchronization unit 7, the first input of which is connected to the output of sensor 6, power supply unit 8 to the switch 9 of emitters, the control input of which is connected to the first output of unit 7 synchronization, the outputs are connected to the corresponding inputs of the ruler 1 emitters, the switch 10 photodetectors, the control input of which is connected to the second output of the synchronization unit 7, the pulse counter 11, the decoder 12 and the block 13 in series control unit 14 control, the information inputs of which are connected to the corresponding information inputs of the switch 10 photo-receivers and the corresponding outputs of the line 2 photodetectors, the prohibition input is connected to the output of the switch

10 photo-receivers and the first counting input of the counter 11 pulses, the counting input is connected to the third output of the synchronization unit 7, the first output is connected to the second counting input of the counter

11 impulses, second output connected

and with the control input of the pulse counter 11 and the second input of the synchronization unit 7, the third output connection.

0

five

0

five

0

five

0

five

0

the third input of the synchronization unit 7, the fourth and fifth outputs are connected respectively to the second and third inputs of the display unit 13.

The control unit 14 is made in the form of serially connected OR circuits 15, the inputs of which are the information inputs of the control unit 14, the circuit 16 And, the counter 17 modulo N, where N is the number of photoreceivers in line 2, the trigger 18 of the display and the first key 19, the output which is the fourth output of the control unit 14, the prohibition trigger 20, the first input of which is the prohibition input of the control unit 14, the second key 21, the first input of which is connected to the second inverse output of the display trigger 18, the output is the fifth output of the control unit 14, third class Here, 22, the first input of which is connected to the inverse output of the inhibition trigger 20, the output is the first output of the control unit 14, the second input is connected to the second input of the 16 K circuit and is the counting input of the control unit 14, the mode setting 23, the output of which is connected with the second inputs of the first and second keys 19, 21 and the third input of the third key 22 and is the second output of the control unit 14 of the simulator 24 of the row signal, the output of which is connected to the second inputs of the counter 17 modulo N of the inhibit trigger 20 and the trigger 18 display and third exit bl 14 ka control.

The device works as follows.

The conveyor 4 moves the measured object 3 to the measurement zone between the ruler 1 of the emitters and the ruler 2 of the photodetectors (it is possible to move the rulers 1 and 2 installed on the same moving carriage relative to the object 3 lying on the fixed transparent table, which does not change the essence of the invention ).

When moving, part of the photodetectors will be darkened by the measured object 3.

According to the signal, the sensor 6 of the synchronization line 7 supplies control signals to the switch 9 of emitters and switch 10 of the photodetectors. The switching of the emitters of the ruler 1 and the interrogation of the photodetectors of the ruler 2 takes place. The photodetector signals that form at the output of the switch 10 are receiving and receiving signals — counting area pulses — are fed to the first input

516

counter 11 pulses. When the whole object passes through the measurement line between the rulers 1 and 2 of the emitters and radiation receivers, the counter 11 accumulates the result of measuring the area of the object 3, which through the decoder 12 enters the display unit 13, where it is fixed by digital indicators,

If there are no readings on the digital indicators of block 13 if there are no objects on the measurement line 3 (zero), then all emitters and radiation receivers of lines 1 and 2 are in good condition. If, in the absence of an object 3 measurements on the measurement line on the digital indicators of the display unit 13, the readings change (they differ from zero), then this indicates a malfunction of the measuring system, which is possible both with the failure of one or several emitters and with the failure of one or several radiation receivers. If it is necessary to check the operation of the device in the Search mode, the operator switches the device to the specified mode using the setpoint adjuster 23 modes (Fig. 2) Measurement - Search and includes (using, for example, a button) the string signal simulator 24 (Fig. 2) .

In this case, the operation of the line sensor 6 is blocked, the first counting input of the counter 11 is blocked, and the synchronization unit 7 is fed by one pulse of the scanning line from the line signal simulator 24. At the same time, this impulse arrives at the R-input of trigger 20 of the Prohibition, setting it to the initial position.

When a signal is received from simulator 24. the circuit works as well as from line sensor 6 in Measurement mode: synchronization unit 7 generates clock pulses for switching on emitters and polling radiation receivers, but only during the time of one area sweep line.

If, after a signal to turn on the next emitter, it does not light up, when polling photoreceivers that are in the group of photoreceivers interacting with this emitter, counting pulses occur, as in the measurement of the area in the Measurement mode. These false square counting pulses are formed at the output of the photodetector amplifiers and through the circuit 14 OR and

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circuit 16 And posgupach to the input of the counter

17 mod N (Fig. 2). The number of polling pulses at the output of circuit 16 And when any of the radiators fail, is N, which leads to overflow of counter 17 to nod N and at its output an overflow signal is applied to the first input S of the trigger

18 indications (Fig. 2).

The flip-flop 18 tilts to the position at which, at the output of the first key 19 (Fig. 2), a radiation failure signal is detected, which is fixed in the display unit 13.

In the Search mode, the clock from the synchronization unit 7 via the third key 22 (Fig. 2) is sent to the second counting input of the pulse counter 11, which in this mode is used to fix the number of the faulty emitter or photodetector.

The first false counting square impulse from the output of the switch 10 of the photodetectors enters the trigger 20 is locked (Fig. 2), at the output of which a signal appears that closes the third key 22, blocking the further operation of the counter 11.

At the output of the counter 11, the code of the number of the defective radiator (LED) is recorded, fed through the decoder 12 to the display unit 13, where it is displayed on the digital indicators

If one or several photodetectors malfunction, the circuit operates in the same way, however, overflow of the modulo 17 counter in this case does not occur, since the simultaneous malfunction of N photodetectors of radiation is practically impossible.

Therefore, the trigger 18 of the indication does not overturn, the signal 11 is stored at its inverse output, and through the second key 21 (Fig. 2) a signal of a photodetector is given to the display unit 13.

The code of the number of the faulty photodetector, as in the case of the malfunction of the emitters, is recorded in the counter 11 of area pulses and then the number is displayed on the digital indicators of the display unit 13.

Claims (2)

1. The device tch measuring area is opaque; flat figures, a supporting conveyor, a conveyor drive, an optically coupled line of emitters and a line of photodetectors, located on opposite sides of the conveyor belt, perpendicular to its direction of movement, with the emitters and photoreceivers installed so that at least some of the photoreceivers are installed each on the path of radiation of several consecutive emitters, including at least one radiator, on the path of radiation of which an adjacent photoreceiver is installed, sensors square sweep lines, mechanically connected with the conveyor, synchronization unit, the first input of which is connected to the sensor output of the square sweep line, transmitter of emitters, the control input of which is connected to the first output of the synchronization unit, outputs connected to the corresponding inputs of the radiator line, switch, photodetectors, the control input of which is connected to the second output of the synchronization unit, information inputs are connected to the corresponding inputs of the line of photodetectors, successively connected These pulse counters i the first counting input of which is connected to the output of the photodetector switch, the decoder and the display unit, characterized in that, in order to increase reliability, it is equipped with a control unit, the information inputs of which are connected to the corresponding outputs of the line of photodetectors, the inhibitor is connected to the output of the switch photodetectors, the counting input is connected to the third you Q - n 5 Q five the synchronization unit, the first output is connected to the second counting input of the pulse counter, the second output is connected to the control input of the pulse counter and the second input of the synchronization unit, the third output is connected to the third input of the synchronization unit, the fourth and fifth outputs are connected respectively to the second and the third inputs of the display unit. 2. The device according to claim 1, characterized in that the control unit is made in the form of series-connected OR circuit, whose inputs are used as information inputs of the control unit, AND circuit, counter mod N, where N is the number of photodetectors, display trigger and first key the output of which is the fourth output of the control unit, the prohibition trigger, the first input of which is the prohibition input of the control unit, the second key, the first input of which is connected to the second inverse output of the display trigger, the output is the fifth output of the control unit, t The other key, the first input of which is connected to the inverse output of the inhibit trigger, the output is the first output of the control unit, the second input is connected to the second input of the AND circuit and is the counting input of the control unit, the mode setter, the output of which is connected to the second inputs of the first and second keys and the third input of the third key is the second output of the control unit, the line signal simulator, the output of which is connected to the second inputs, the modulo N counter of the inhibit trigger and the display trigger and is the third output of the counter l №.f