SU1431061A1 - Redundancy pulse distributor - Google Patents

Abstract

The invention relates to automation, pulsed and computing technology. The purpose of the invention is to increase the reliability of the pulse distributor by eliminating one of the two distributors included in it in case of its incorrect operation. The determination of the fact of the incorrect operation of the distributors (P) 1.1 or 1.2 makes the threshold elements 3.1 or 3.2. When both P 1.1 and 1.2 malfunction, the output signals of the device are blocked by the signal from the NAND 4 element. If one of the P 1.1 or 1.2 fails, the signal from the output of the corresponding threshold element 3.1 or 3.2, entering the inputs of the elements OR 6 or 7, blocks the passage of signals from the faulty distributor through the element 8 of each channel 5.1-5.N. 1il with: $

Description

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The invention relates to automation, pulsed and computing technology.

The aim of the invention is to increase the reliability of the redundant pulse distributor, achieved by eliminating one of the two distributions on the one of the outputs of the signal distributor from its operation.

In the initial state, when there are no signals on either of the outputs of the distributors 1.1 and 1.2, both threshold elements 3.1 and 3.2 generate error signals that are fed to the inputs of the AND-NE element 4, the low level signal

dividers in case of its incorrect operation from the output of which the third inputs of the elements AND 8 in each channel 5 are fed. 1-5.N and blocks the output buses 9.1-9.N.

In the absence of faults grow.

The drawing shows a functional diagram of a redundant pulse distributor.

The reserved distributor im-jj limiters 1.1 and .1.2 under the influence of

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pulses contains the first I.1 and 1.2 second distributors, the inputs of which are combined and connected to bus 2, timing, the first 3.1 and second 3.2 threshold elements, the AND-HE element 4 20 and in each channel 5.1-5.N group of elements, consisting of the first 6 and second 7 OR elements and the AND 8 element, with the output of the AND 8 element in each channel 5.1-5.N connected to the corresponding output bus 9.1-9.N, the first and second inputs of the AND 8 element each channel 5.I-5.N are connected respectively to the outputs of the first 6 and second 7 elements OR, the outputs of the first distributor 1.1 are connected to respectively The first inputs of the first threshold element 3.1 and with the first input of the first elements OR 6 of each channel 5.J-5.N and the outputs of the second distributor 1.2 are connected to the corresponding inputs of the second threshold element 3.2 and the first input of the second elements OR 7 of each channel 5.1 -5.N, the second inputs of the first elements OR 6 of each channel 5.1-5.N are combined and connected to the output of the first threshold element 3.1 and to the first input of the element AND-NOT 4, the second inputs of the second elements OR 7 of each channel 5.1-5.N combined and connected to the output of the second threshold element 3.2-coagulant and a second input of AND-NO element 4, whose output is connected to the third input of the AND 8 cal 5.1-5.N th channel.

The redundant pulse distributor operates as follows.

The error signal at the output of the threshold element 3.1 or 3.2 appears in the event of a malfunction or failure of the corresponding distributor 1.1 or 1.2 in cases when their outputs present at the same time have more than one output level signal or when

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clock pulses arriving at their combined inputs from the clocking bus 2, successively generate pulses (output level signals) at their same outputs at the same time. The presence of the first pulse and the output of the distributors 1.1 and 1.2 leads to the disappearance of signals of errors at the outputs of the threshold elements 3.1 and 3.2 and to the appearance of a high level at the output of the AND-HE element 4.

The pulses from the same outputs of the first 1.1 and second 1.2 valves, respectively, through the first 6 and second 7 elements OR in each channel 5,1-5.N go to the first and second inputs of elements AND 8, and the signal is high level from the output of the NAND element 4 does not prevent the passage of pulses from the distributors through the corresponding AND elements 8 to the output buses 9.1-9.N.

In the event of malfunctions or failures in one of the valves, which lead to the triggering of the corresponding threshold element during normal operation of the other distributor, the device works as follows.

The high level error signal from the output of the corresponding threshold element 3.1 or 3.2 is fed to the second inputs of the corresponding elements OR 6 and 7 of each channel 5.1-5, N, the first inputs of which are connected to the corresponding outputs of the faulty distributor. Thus, regardless of the condition in which the outputs of the faulty distributor are located, the outputs of the corresponding OR elements of each channel have high logic level signals that are fed to the corresponding inputs of the AND 8 elements. So

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clock pulses arriving at their combined inputs from a clocking bus 2, successively generate pulses (output level signals) at their respective outputs. The presence of the first pulse at the output of the distributors 1.1 and 1.2 leads to the disappearance of the error signals at the outputs of the threshold elements 3.1 and 3.2 and to the appearance of a high level at the output of the AND-HE element 4.

Pulses from the same outputs of the first 1.1 and second 1.2 valves, respectively, through the first 6 and second 7 elements OR in each channel 5,1-5.N go to the first and second inputs of elements And 8, and the high level signal from the output of the element AND NOT 4 It does not prevent the passage of pulses from the distributors through the corresponding elements of AND 8 to the output tires 9.1-9.N.

In the event of malfunctions or failures in one of the valves, leading to the triggering of the corresponding threshold element, during normal operation of the other valve, the device operates as follows.

The high level error signal from the output of the corresponding threshold element 3.1 or 3.2 is fed to the second inputs of the corresponding elements OR 6 and 7 of each channel 5.1-5, N, the first inputs of which are connected to the corresponding outputs of the faulty distributor. Thus, regardless of the state in which the outputs of the faulty distributor are located, at the outputs of the corresponding OR elements of each channel there are high logic level signals that are fed to the corresponding inputs of the AND 8 elements. So

as at the inputs of the NAND 4 element there is only one error signal, then the high level of the signal at the output of this element does not prevent the impulses from the regularly working distributor through the elements I. 8 to the output tires 9.1-9.N.

Thus, in the event of a malfunction or outage of one of the distributors, the state of the output buses 9.1-9.N of the reserved pulse distributor is determined by the state of the outputs of the normally operating distributor.

If as a result of a failure at the outputs of the first and second valves, more than one pulse is simultaneously present, then both threshold elements 3.1 and 3.2 are triggered and an error signal is sent to the first and second inputs of the AND-NOT element 4, the low level signal from whose output will affect the third inputs of the elements And 8 of each channel 5.1-5.N, blocks tires 9.1-9.N.

If the result is a mismatch between the 1.1 and 1.2 distributors, i.e. At the outputs of the first 1.1 distributor, only one pulse will be present at the same time, and at the outputs of the second 1.2 distributor - also only one pulse, but these pulses will be at the non-named outputs, And 8 will not pass these pulses to the output buses 9.1-9.N.

Thus, increasing the reliability of the device is achieved by maintaining operability in cases of failures or malfunctions in one of the two valves, resulting in the presence of one switch on the outputs of this switch.

temporarily two or more pulses, as well as in cases of two or more spurious signals hanging at the outputs of one of the distributors during normal operation of the other distributor.

Claims (1)

Invention Formula 0 five 0 five 0 five 0 A redundant pulse distributor containing the first and second identical distributors whose inputs are combined and connected to the clock bus, the first threshold element and in each channel a group of elements consisting of the AND element and the first OR element, the output of which is connected to the first input of the AND element, output which is connected to the corresponding input bus, which is distinguished by the fact that, in order to increase reliability, a second threshold element is introduced into it, an AND-NOT element and in each channel is the second OR element, whose code has united with the second input element AND of this channel, the outputs of the first distributor are connected to the inputs of the first threshold element and with the first inputs of the first OR elements in each channel, the outputs of the second distributor are connected to the inputs of the second threshold element and the first inputs of the second OR elements the first OR elements of each channel are combined and connected to the output of the first porS1GODOoElement and to the first input of the NAND element, and the second inputs of the second OR elements of each channel are combined and connected with the output of the second threshold element and with the second input of the NAND element, the output of which is connected to the third inputs of the AND elements of each channel.