SU1487046A1 - Unit for checking pulse train source - Google Patents

Description

The invention relates to automation and computing and can be used to control the sources of a sequence of pulses in various systems and control devices. The aim of the invention is the extension of functionality due to the control sequence of the issuance of pulses, which differ in the order of receipt. This goal is achieved by the introduction of a shaper .2 pulses, counters 3 ₁ - 3C, counter 4, elements I 5, - 5 _p , 1 sludge.

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The invention relates to automation and computing technology and can be used to control sources of a sequence of pulses in various systems and control devices.

The purpose of the invention is the expansion of functionality due to the control sequence of the issuance of pulses, which differ in the order of receipt.

The drawing shows a functional diagram of the device.

The apparatus comprises an OR 1 generator 2 pulses, the counters 3, - W _b, the counter 4, AND gates 5, 5 _K, an OR gate 6, the trigger 7, the OR gate 8, input 9 initial installation, groups 10 ₁ - 10 _s inputs Tasks of the order of receipt of monitored pulses, inputs 11 ₁ - 11 „of monitored sequences, a group of 12 inputs for setting the number of pulses of monitored sequences and output 13. correct operation of the device.

The device works as follows.

The shaper produces 2 pulses on the trailing edge of the pulse (1-0 difference) at its input a pulse of duration C ,. The value of b, choose the minimum sufficient for a clear trigger counters 3 ,, 3 ₂ , ... "

3 _n and 4 at the counting input.

Counters 3 ,, 3 ^, ..., 3 „and 4 can be performed as summing and subtractive. When a pulse arrives at the resolution inputs of the recording of counters 3 ,, 3 ₇ , ..., 3 „and the counter

4 they contain the code located on the information inputs of each of the Counters. On the leading edge of the pulses arriving at the counting input of the counters З _о 3 ,, ... "3" and 4, the unit is added to the contents of the corresponding counter (if the counter is made summing) or from the contents of the counter is subtracted (if the counter is executed by the subtractor). If the counters 3 ,, 3 ₂ , ... "3 _p and 4 pulses of owls are summed, then their outputs are transfer outputs and there is always a signal on them, except when the contents of the counter _ are 2 ^k - 1, where k - digit capacity of 'counters 3 ,, 3 ₂ , ... "3„ and 4 (i.e. when the counter is full), and on its

counting input no pulse; in this case, the signal disappears at the counter output (a zero signal appears). If the counters. 3 ,, 3 ^, ...,

3 „and 4 are made subtractive, then their outputs are loan outputs and they always have a signal, in the case where the counter is zero and there is no pulse at its counting input; in this case, the signal disappears at the output of the counter.

A pulse is supplied to the input 9 of the initial setup, the duration of which should be sufficient to write to the counters 3, 3 ^, ..., C _to and 4 codes located on the information inputs of these counters, and to set the trigger to zero position 7. The number of entries in each group

10 ,, 10 ₂ , ..., 10 _{ъ of} inputs is equal to the digit capacity of counters 3 ,, 3 ..., 3 _and , the number of inputs of group 12 is equal to the digit capacity of counter 4. For each group

10., 10 _g , ..., 10 „inputs give the code of the initial position of the corresponding one from the counters 3 ,, З _г , ...” З _и .

As the initial position of the counters Z _o 3 ₇ ,, ,,,, 3 &, the number of the pulse reduced by one is applied to the information inputs of the corresponding counter. The inputs of group 12 are fed with the code of the initial position of the counter 4 — the code of the number of pulses in the sequence emitted by the source.

one . - ·,

Each of the inputs 11 ,, 11 ₂ , ..., 11 „is connected to one of the outputs of the source of the sequence of pulses. The source of the sequence sends successive pulses to its outputs (one pulse for each output) sequentially in time. One pulse of the sequence must be separated from the other by a pause, the duration of which must not be less than the value of £ ι is determined based on the fact that the next pulse must be emitted by the source after the time required to trigger the chain: element OR 1 - driver, 2 pulses - counters

3., 3 ₂ , ..., W _p , i.e. at the exit of that

from counters 3 ,, 3 ..., 3 „, the contents of which turned out to be zero, after arriving at its clock,

pulse input from shaper output

2 a zero signal must be clearly established before the next IM5 arrives

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pulse to one of the inputs 11 ,, 11,

.... 11 to ·

Before starting the source of the sequence of pulses to the inputs of groups 10 ,, 10 _? ., ... "U _p and 12 are given the codes of the initial position of the counters 3,, 3 _? , ..., 3 _n and 4, respectively, then an input is given to the input 9 of the initial setup, which sets the trigger 7 to the zero position and records the codes located at the inputs of groups 10 ,, 10 ,, ..., 10 _n and 12 in counters 3 ,, 3 ,,

.3 „and 4 respectively.

Let the maximum number of pulses in the sequence η = 5. Consider the operation of the device for three options:

I - the number of pulses in the sequence is equal to the maximum, i.e. five;

II - the number of pulses in the sequence is less than the maximum, say, equal to 3;

III - the source does not generate pulses, i.e. controlled by the pause between the sequences of pulses emitted by the source.

I variant: the source has one pulse for each of its output and, accordingly, for each of the groups

10 ,, 10, ..... 10 ₅ device inputs,

impulse arrives, the total number of impulses' in the sequence is thus equal to the maximum, that is, 5.

Suppose that the first pulse of the sequence must go to input 11 ₃ , the second to input 11 ₅ , the third to input 11 _g , the fourth to input 11. ₄ and the fifth to input 11,.

In this case, before applying a pulse to input 9, the following initial position codes must be submitted to groups 10, H0 y and 12 inputs:

on group 10, inputs - the binary code of the number "4" - 100;

on a group of 10 _{g of} inputs the binary code of the number "2" - 010; on a group of 10 ₃ inputs, the binary code of the number "O" - 000; on a group of 10 ₄ inputs the binary code of the number "3" is 011;

on a group of 10 ₅ inputs the binary code of the number "1" is 001;

on a group of 12 inputs the binary code of the number "5" is 101,

When a pulse is applied to the input 9, the corresponding codes are entered into the counters 3 ,, 3 ,, ..., 3 „and 4 and the trigger 7 is set to the zero position. After entering the codes, the zero signal is present, only at the output of counter C ₃ . If the sequence pulses are issued by the source in the prescribed manner and their number is equal to the specified one, then the device operates as follows.

The source issues the first pulse of the sequence to the third output and, respectively, to the input 11 ₃ , but the element I 5z does not work, as it is closed due to the absence of a signal at the input of the counter C ₃ . At the moment of the end of the pulse at the input 11, the driver 2 is triggered and the pulse from its output reduces the contents of the counters 3, - 3 ₅ and 4 by one. After this, the following binary codes will be written in the counters:

at counter h - binary code 01 1; at counter 3, - binary code 001; at counter H ₃ - binary code 111; at counter 3 < - binary code 010; at counter 3 ₅ - binary code 000; at counter four - Binary code yo

After the end of the pulse from the output of the former 2, signals are present at the outputs of the counters 3, - 3 ₄ and 4, and there is no signal at the output of the counter 3 ₅ .

The second pulse of the source gives the source to the fifth output and, accordingly, to the input 11, the element I 5 does not work, as it is closed due to the absence of a signal at the output of the counter 3 At the time of the end "· * 1 -1

the pulse at the input 11 $ the pulse from the output of the shaper 2 reduces by one the contents of the counters 3, - 3 _ε and 4. The following binary codes will be recorded in the counters after that:

in counter 3, - binary code 010; in the counter З ^ - the binary code 000; in the counter C ₃ - the binary code 110; in the counter 3 ₄ - binary code 001; in the counter 3 ₅ - binary code 111; in counter 4, the binary code is 011. After the end of the pulse from the output

driver 2 at the outputs of the counters.

3 ,, 3 ₅ - 3 ₅ and 4 signals are present, and at the output of counter 3 there is no signal.

Third pulse sequence

the source goes to the second exit and,

respectively, to the input of 1C, but the element And 5 4 does not work, since it

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output counter 3 ₄ . At the moment of the end of the pulse at the input 11 _{2 the} pulse from the output of the driver 2 reduces by one the contents of the counters 3, 3 _? and 4. The following binary codes will be recorded in the counters after that:

at counter h - binary code 001; ten at counter 3 ₂ - binary code 111; at counter - binary code 101; at counter 3 < - binary code 000; at counter 3 ₅ - binary code 110; at counter four · - binary code 010. 15

After the end of the pulse from the output of the driver 2, the outputs of the counters 3, 3 ₂ , 3 ₅ , 3 ^ and 4 present signals, and the output of the counter 3 _{4 has} no signal, 20

The fourth pulse of the sequence, the source gives the fourth output and, accordingly, the input 11 ₄ , but the element And 5 ₄ does not work, because it is closed due to the lack of a signal 25 at the output of the counter 3 ₄ . At the moment of the end of the pulse at the input 11 _{4 the} pulse from the output of the shaper 2 reduces by one the contents of the counters 3, - 3 $ and 4. In the counters after that, there will be

The following binary codes are written: at counter h, - binary code 000; at counter ³ 1 ~ binary code 110; at counter ^{З З} " binary code 100; at counter 3, - binary code 111; at counter H ₅ - binary code 101; at counter four - , binary code 1 301.

After the end of the pulse from the output of the former 2, signals are present at the outputs of the 3 _L - 3 ₅ and 4 counters, and there is no signal at the output of the 3 counter.

The fifth pulse of the source sequence vytsaet to the first output and, accordingly, to the input 11 ,, but the ele-h ment And 5, does not work, as it is closed due to the lack of a signal at the output of the counter 3 ,. At the moment of the end of the pulse at the input 11, the pulse from the output of the driver 2 reduces by one the contents of the counters 3, - 3 _? and 4. In the counters after this will be

recorded following binary codes: at counter ³ ί - binary code 111; at counter ³ 1 “ binary CODE 10.1; at count H ₃ ~ binary code 011; at counter 3 ₄ - binary code ΊΊθ; at counter 3 ₅ - binary code 100; at counter four - binary code 000

After the end of the pulse from the output of the driver 2, the outputs of the counters 3, - 3 ^ are signals, and the output of the counter 4 is no signal.

T-so, after the end of the sequence of pulses issued by the source correctly (i.e., all pulses are output to the source outputs | in the prescribed order and their number in the sequence corresponds to the specified one), trigger 7 is in the zero position and since there is no signal at the output counter 4, then the output element OR 8, and output 13, the signal is missing, indicating that the source when issuing a sequence of pulses worked correctly.

If a disturbance occurs in the source of the pulse sequence, which is expressed in the fact that the pulse is not outputted to the required output, before - '.''· Is allowed, the third pulse is outputted by the source not to the second output, but to the third (in the described case), then this impulse arrives at the input of the element I 5 ₃ , which is open at the first input by a signal from the output of the counter Z _a . Element And 5 _{3 is} triggered, and the signal from its output through the element OR 6 sets trigger 7 to one. After the end of the sequence of pulses, if the number of pulses in the sequence is equal to the specified one and there is no signal at the output of counter 4, the signal at the output of the element OR 8 is stored from a single output. trigger 7. This signal indicates a malfunction of the source of a sequence of pulses.

If there is a violation in the source of the pulse sequence, which is expressed in the fact that more or less pulses are output than specified, then after the end of the pulse sequence, the output of the element OR 8 and the output 13 keep the signal (it comes from the output of counter 4). This signal is indicative of a failure in the source of the pulse train.

Option II - the source generates a sequence of pulses, the number of pulses in which is less than the maximum (equal to 3 in this case). Suppose that the first pulse of the sequence must arrive at

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input 11 ₂ , the second to input 11 ^, the third to input 1 Gy

In this case, before applying a pulse to input 9 to groups of 10 _l - 10 ₅ $ and 12 inputs, you must submit the following initial position codes:

on group 10, - binary code number "2" - 010; per group of 10 g - binary code of the number "O” - 000; per group $ 10 - binary code number "1" - 001 Ϊ on group 10 4. - binary code number. "five" - 101; on group 10 y -binary code number "5" - 101; on group 12 - - binary code number "3" ’ - 011.

20

When a pulse is applied to the input 9, the corresponding codes are entered into the counters 3p3, ..., _3b and 4, and the trigger 7 is set to the zero state (if it was in the unit state). 25

Further, when the source of the pulse sequence at its outputs, the device operates as described.

If the source issued pulses in the set-30 ordering mode and their number is equal to the given one (ie, 3), then after the end of the impulse from the output of the former 2, known after the third impulse of the source · ,; trigger 7 is in the zero state, and in the counters will be

recorded following codes: at counter h, - binary code 111; •at counter H _g - binary code 101; at counter ^{З З} - binary code 110; at counter 3 ₄ - binary CODE 010; at counter h binary code 010; at counter 4 is the binary code 000.

Thus, at the output of the element OR 8, there is no signal, which indicates that there is no failure in the operation of the source of the pulse train. . '

If the source drives a pulse not to the required output or generates more ilts fewer pulses than the set, then trigger 7 is in a single state, or a signal is present at the output of counter 4, respectively, the signal appears at the output of the element OR 8 and at output 13. "

Option III - control of the pause between sequences of pulses,. issued by the source.

In this case, immediately after the end of the issue by the source of the previous series and reading the result of the control, a code, say 111, is fed to groups 10, -10 ₅ inputs, and a code 000 is sent to a group of 12 inputs, after which a pulse is given to input 9 and counters 3 ₁ - 3 ₅ AND 4 the specified codes are written, and the trigger 7 is set to the zero state. B such a condition; the device is located up to the moment of the start of preparation (the supply of a pulse to the input 9) for the next sequence of pulses.

If during the pause between the sequences of pulses no impulses arrive at the inputs 11, -11 ₅ , the trigger 7 remains in the zero position, and there is no signal at the output of counter 4, respectively, there is no signal at the output of the element OR 8, and at the output 13.

If at any of their inputs 11, -11 ₅ during the pause between sequences of pulses at least one pulse arrives, then similarly to the described trigger 7 is set to a single state, the output of counter 4 also has a signal, respectively, a signal appears at the output of the OR element 8, and at output 13, indicating that during the pause, pulses appeared at the source outputs, i.e. there was a failure in the source of the pulse train.,

Claims (1)

Claim A device for controlling the source of a pulse sequence, containing three OR elements and a trigger, and the reset input to the “O” trigger is an input of the initial installation of the device, characterized in that, in order to extend the functionality by controlling the pulse output sequence, which differs by the order of arrival, the device is inserted into a pulse shaper, η elements AND (where η is the number of generated sequences) to n + 1 counters, I and the inputs for enabling the counters to be written from the first to (n + 1) -th are connected to the initial installation of the device, the group of information inputs of the ΐth counter (where 1 4 ΐ 4 n) is the ϊth group 1487046 12 of the setpoint inputs of the device for forming controlled pulses of the device, the group of information inputs of the (n + 1) -th counter is the group of inputs for specifying the number of pulses of the monitored device sequences controlled sequence of the device, the output of the first element OR is connected to the input of the pulse shaper, the output of which is connected to the counting inputs of the counters from the first to the ίth, the inverse output of the th counter dinene with the second input of the ίth element AND, the output of the ίth element AND is connected to the ίth input of the second OR element, the output of which is connected to the installation input to the trigger “1”, the direct output of which is connected to the first input of the third OR element , the output of which is the output of the correct operation of the device, the inverse output of the loan (n + 1) -th counter is connected to the second input of the third element OR.