SU1208533A1 - Programmed control vedice with self-check - Google Patents

Abstract

The invention relates to devices for the automatic metering of reagents and can be used in the automation of technological processes in non-ferrous metallurgy. The purpose of the invention is to increase the reliability of the device. The device contains the first triggers, the first elements AND, the pulse generator, the first pulse counter, the second element OR, the second element AND, the first element OR, the third element AND, the pulse shaper, the power amplifier, the element NOT, the differentiator, the multivibrator, the second pulse counter, - second trigger. The introduction of the multivibrator, the second pulse counter, the second trigger, the differentiator and the element does NOT allow to achieve the goal. 1 il. a (L

Description

The invention relates to devices for the automatic metering of reagents and can be used in the automation of technological processes in non-ferrous metallurgy.

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

The drawing is given a functional diagram of the device.

The device contains the first trigger - 10 ry 1 - 1d, the first elements, the generator 3 pulses, the first counter 4 pulses, the second element OR 5, the second element And 6, the first element OR 7, the third element And 8, the former 9 pulses , power amplifier 10, element 11, differentiator 12, multivibrator 13, second counter 14 pulses, second trigger 15, information inputs 1b - 16f,; 20 devices, second 17, third 18 and first 19 control inputs of the device, control outputs 20ts devices, first 21 and second 22

device outputs. The counter 4 impulses - 25 sov. Consists of triggers 23,.

The device works as follows.

Information inputs 16 /, - 16, devices with a digital computer are supplied with a digital Q code of the form 2 -M, where M is the code of the period of control pulse following, n is the number of bits of the device.

To the control input 17 of the trigger recording 1 - 1) with the CIR, a command to write information to the triggers is sent, to the control input (write permission) 18 of the counter 4 with a digital computer via the element OR 5, a command to write information to the counter 4.

In triggers 1 - 1, the code is recorded by the information recording command, and the output signal from the triggers 1 ,, - 1. is recorded in the counter 4 by the information recording command into the counter, and from this moment the time interval begins. From the generator of 3 pulses to the input of the counter 4, clock pulses arrive, each of which adds one to the content, until it assumes state 2, i.e. until all its outputs are not in ts signals with level 1. At the same time, at the output of the element I 6 there is a signal, the front of which is the end of the cycle of testing a given interval. From the output of the element AND 6 element OR 5, the signal goes to the control

40

45

50

55

50

five

Q

0

five

0

five

the input (write enable) of counter 4 and again writes code 2 to them, i.e. the cycle repeats.

In order to eliminate false alarms in the absence of information in the triggers 1, the device is equipped with an OR 7 element that supplies the inhibitory potential to the AND 8 element, which controls the pulses from which, through the driver 9, connected to the power amplifier 10, arrive at the device output 21.

To control the accuracy of the information transmitted by the digital computer and recorded in the triggers 1-1, there are elements And 2 that are triggered when the signal (permission) is applied to the control input. 19 with a digital computer. Outputs 20j are connected to a digital computer. In addition to performing control functions, elements 2 inform the digital computers of the contents of the triggers during remote input of information.

The element HE 11, differentiator 12, multivibrator 13, counter 14, and trigger 15 are introduced into the device to control the output signal parameters and the protection from the appearance of a continuous signal device.

The frequency of the pulses produced by the multivibrator 13 is chosen such that the time interval worked by the counter 14 when it is filled with the pulses of the multi-vibrator 13 is equal to

2-1

 T,

f

where f is the pulse frequency of the generator of 3 pulses; T is the total time-delay pulses in the imaging unit 9 pulses and the amplifier 10 power; K is a constant coefficient,

causing the exclusion of signal generation to fail in the event that the counter fulfills the maximum possible time interval,

 2-1, is equal to -,,

n is the number of bits of the device.

During normal operation, the device 14 periodically resets the counter 14, a signal does not appear at the output 22. The reset pulse is generated by the element NOT 11,

differentiator 12 according to the decay of the control pulse at the output of the amplifier 10 -POWER. In order to reset the signal of failure when the device is restored to serviceability, a reset pulse is also supplied to the zero input of the tri1-ger 15.

If on the power amplifier 10, control pulses are absent, i.e. Any device node (triggers 1;, - 1n, generator 3 pulses, elements 6 and 8, driver 9 pulses, power amplifier 10) functions abnormally, then counter 14 overflows and starts trigger 15, at output 22 A tragio appears as a single signal indicating a malfunction of the device.

F o rmula of the invention

A device for software control with self-control, containing the first triggers connected by the first inputs to the corresponding information inputs of the device, and the direct outputs to the inputs of the first OR element and to the first inputs corresponding to the first I. elements connected by the second inputs to the first control input. devices, and the outputs - with the control outputs of the device, the first pulse counter, connected by a counting input to the output of the pulse generator, is WTO.

Sh

208533

The third element AND, the third element connected by the first input to the output of the first element OR, and the output to the input of the pulse former connected by the output through the power amplifier to the first output of the device, the second element OR, characterized in that devices, a multivibrator, a second pulse counter, a second trigger, a differentiator and a NO element connected to the output of the power amplifier and an output to the differentiator input connected to the output with a zero input of the second trigger L in The second zero pulse counter, connected by a counting input to the output of the multivibrator, and the overflow output are connected to the single input of the second trigger connected to the second output of the device, the synchronization inputs of the first trigger are connected to the second control input of the device, the third control input of the device is with the first input of the second element OR, connected by the second input to the output of the second element AND and to the second input of the third element AND, and the output to the control input of the first counter 1 | mplusov, nnogo installation leaves the respective outputs of the first flip-flops and discharge dnymi outputs - to the inputs of the second element I.

20

25

behind

g /

Compiled by N.Gorbunova. L. Veselovska Editor. Tehred T. Dubinchak Korrektor.i, Muska

Order 287/57 Circulation 837 Subscription

VNIIPI USSR State Committee

for inventions and. Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP Patent

Claims (1)

Claim A device for programmed control with self-control, containing the first triggers connected by the first inputs to the corresponding information inputs of the device, and direct outputs to the inputs of the first OR element and to the first inputs corresponding to the first elements AND connected by the second inputs to the first control input of the device, and the outputs with control outputs of the device, the first pulse counter connected to the output of the pulse generator by the counting input, the second element And, the third element And, connected by the first input to the output the first OR element, and the output with the input of the pulse shaper, 5 connected by the output through the power amplifier to the first output of the device, the second OR element, characterized in that, in order to increase the reliability of the device, a multivibrator, a second pulse counter, and a second trigger are introduced into it, a differentiator and an element NOT connected by an input to the output of the power amplifier, and by an output to the input of a differentiator15 connected to the output with the zero input of the second trigger and the zeroing input of the second pulse counter connected to the counter towards the output of the multivibrator, and overflow output to the single input of the second trigger connected by the output to the second output of the device, the synchronizing inputs of the first triggers connected to the second control input of the device, the third control input of the device to the first input of the second OR connected to the second the input to the output of the second element And to the second input 3Q of the third element And, and the output to the control input of the first pulse counter associated with the installation inputs with the outputs of the corresponding first rigger, and the bit outputs - to the inputs of the second element I.