SU767971A1 - Device for checking counters - Google Patents

Description

one

The invention relates to a pulse technique and can be used in automatic and computing devices.

There are known devices for counterparts, counters containing monitored counters, control triggers, pulse distributor, made in the form of a matrix from the system of delay cell 1, which will help to determine the numbers of faulty counters.

However, such devices, which allow judging by the state of the trigger, about the health or malfunction of the transfer chains as a whole, do not allow to find a specific defective transfer chain.

In addition, these control devices have a limited scope. Checking the correct operation of the counters, based on the control of single and zero signals from all bits (decoding of the single or zero state of the counters), is suitable for counters built on potential elements and not acceptable for counters built on magnetic elements, for example, FTN .

Of the known devices, the closest in technical essence is a device for controlling counters, containing controlled counters connected in series through OR elements, a pulse generator, an AND element, a trigger, a level distributor, OR elements, initial state deciphers, and maximum-value counter decoders, elements indications. The outputs of the monitored counters are connected via source state decoders and maximum value decoders to the inputs of the OR elements, the outputs of which are connected to the corresponding display elements and to the inputs of the OR-NOT element. The output of the element OR is NOT connected to the input of the element AND, the second input of which is connected to the pulse generator, the third input to the output of the trigger. The output element And connected to the level distributor, the outputs of which are connected to the inputs of the control reverse

20 controlled counters and to the control inputs of the decoders. The device input is connected to the trigger input and to the installation inputs to the initial state of the pyeMibix meters F ram.

The disadvantages of such a device for controlling counters are as follows: So, for example, in the case of a failure in one of the counters during its filling with pulses, it may overflow with the recording of an extra GH into the Subsequent counter. When this happens, the next counter may overflow with a distortion of the information of the counter behind it, and so on. As a result, when monitoring the counters with the help of maximum value detectors (determiners of units) of the item of the citation element, they will indicate a malfunction not only of the counter in which the failure occurred, but also of subsequent or subsequent counters, which normally function. A similar phenomenon can occur in some newer counter counters, for example, in the pulse counting process, one of the counters of the counter, settled at 1, remains in the unit and passes the output pulses to its input.

The disadvantage is also limited scope. Verification of the operation of SCORES, based on the control of their zero and single states with the help of decoders of the initial value and the decoder of the maximum value of the counters,

suitable for meters built, for example, on static triggers and not acceptable for meters built on magnetic elements, for example, FTN or integrating transformers, etc.

The purpose of the invention is to ensure the reliability of the control and enhance the functionality of the device.

The goal is achieved by the fact that the device for controlling counters, containing a pulse generator, connected through an OR element to the first inputs of monitored counters, a single impulse generator, the first AND element, and a summing trigger, the first output of which is connected to the first input of the first element AND , a block of pulses conversion into a rectangular pulse, the first and second additional elements And, the delay element and the number of

Controlled counters input elements And, first elements And control, second elements And control, first triggers the input element And the subsequent counter, and the first input of the input element And the first counter is connected to the output of the photo of the single pulse and to the second input of the first element And,

the output of which is connected to the second input of the OR element, the output of the first input element AND is connected to the second input of the first controlled counter, the second inputs of the first I control elements are connected to

the first output of the pulse burst conversion unit into a rectangular pulse whose input is connected to the output of the pulse burst generator, and the second output to the input of the single pulse shaper, to the first input of the first additional And element and to the second inputs of the second And control elements, while the outputs the first elements And the control are connected to the first inputs of the corresponding first control triggers, the outputs of which are connected to the third inputs of the corresponding

second control elements whose outputs are connected to the first inputs of the corresponding second control triggers connected via the second additional element I to the input of the summing trigger, the second output of which is connected to the input of the pulse generator generator, to the second inputs of the first and second control triggers and through the delay element to the second. input of the first additional element And, the output of which is connected to the second inputs of the input elements And, connected to the outputs to the second inputs of the corresponding monitored counters.

The electrical circuit of the meter control device is shown in

J, - the drawing.

The device contains a generator of 1 packs of pulses, an element OR 2, controlled counters 3, a block 4 converting a pack of pulses into a square pulse, impulse-potential triggers 5, 6 contS, summing trigger 7, input elements AND 8, first elements AND 9 controls , second elements AND 10 control, elements AND 11, 12, 13, shaper 14 single pulse and delay element 15. The output of the generator 1 through the element OR 2 is connected to the first inputs of monitored counters 3, the outputs of which are connected to the first inputs of the elements AND 9, 10 control The output of each counter 3 except the last one is also connected to the first input.

5 input element And 8 subsequent counter, and the first input of the input element And 8 of the first counter 3 is connected to the output of the former single pulse generator 14 and, with the first input of the AI element, the second input

  The second one is connected to the zero output of the trigger 7, and the output is to the second input of the element OR 2. The second inputs of the AND 9 Control elements are connected to the first output of the pulse-to-square pulse conversion unit 4, the input of which is connected to the generator output 1, and the second output is with the input of the imaging unit 14, the first input of the element And 12 and with the second inputs of the elements And 10 control. The outputs of the elements And 9 control are connected to the single inputs of the corresponding triggers 5 controls, zero outputs of which are connected to the third inputs of the corresponding elements And 10 controls, the outputs of which are connected to the single inputs of the corresponding control triggers 6, connected by single outputs through the element And 13 to the single input of the summing trigger 7. A single trigger output 7 is connected to the generator input 1 of bursts of pulses, to the zero inputs of the flip-flops 5, 6 controls and through the delay element 15 to the second input of the And element 12. The output of the AND 12 element is connected to the second inputs of the input elements AND 8, the outputs of which are connected to the second inputs of the corresponding monitored counters 3. The state of the triggers is received, at which the resolution is on the single output. (high) potential, for a single condition, at which the permitting potential is at zero output, for zero condition, the device works as follows. In the initial state, the monitored counters 3, the monitoring triggers 5, 6, and the summing trigger 7 are set to the zero state. At the same time, the control elements 9, 10 are closed at the first inputs by the low output potentials of the counters 3. The control elements are also closed at the second inputs by the low potential of the first output of the pack 4 conversion unit and pulses into a square pulse. Elements 10 of the control are open at the second inputs by the high potential of the second output of block 4 and at the third inputs by the high potentials of the zero outputs of the respective triggers 5. Element 11 is closed at the first input by the low output potential of the driver 14 and is opened at the second input by the high potential of zero output of the trigger 7. Element And 12 is open at the first input by the high potential of the second output of block 4 and is closed at the second input by the low output potential of the delay element 15. Element And 13 is closed by the low potentials of single outputs b rows triggers a control. Input elements And 8 are closed on both inputs. By the command "Start (not shown), generator 1 generates a pulse train arriving at the input of the pulse burst conversion unit 4, into a rectangular pulse and through the OR element 2 to the first inputs of controlled counters 3. The number of pulses in the chain is selected from the condition of maximum filling counters 3 and, for example, for binary counters is equal to - 1, where n is the size of the counters. A high potential appears at the input of the unit 4 of a burst of pulses at the first output, which opens the control elements AND 9 at the second inputs, and a LOW potential at the second input, and the control elements AND 10 at the first input 12. At the end of the burst, at the first output of block 4 a low (closing) potential appears, and at the second output a high (resolving) potential, on the leading front of which a single pulse is formed at the output of shaper 14. The output pulse of the imaging unit 14 flows through the elements AND 11, OR 2 to the inputs of the counters, causing them to overflow. The overflow pulses of the counter 3 open the elements AND 10, the output signals of which set the corresponding triggers 6 to one state. When set to "1 all the triggers 6, the element And 13 opens and the summing trigger 7 is set to one. This completes the first cycle of operation of the device . In the event of a failure or malfunction of one of the counters 3, the corresponding control trigger 6 does not switch to one state, and the summing trigger 7 remains in the zero state. In this case, if, as a result of a malfunction, an overflow pulse appears at the output of counter 3 during the operation of a burst of pulses, it opens the corresponding control element AND 9 and sets in one state a trigger 5, which closes the corresponding And 10 element with a low potential of zero output. Thus, in the event of a fault, the number of the failed counter is determined by the state of the corresponding control trigger 6, and the corresponding control trigger 5 can provide additional information about the failure STI counter. At the end of the first cycle of operation, after the summing trigger 7 is set to one, the high potential of its single output again starts the generator of 1 pulse bursts, sets (on the leading edge of the potential) to "On the control triggers 6" and confirms the zero state of the control triggers 5. The low potential of the zero output of the trigger 7 closes the element 11. For the duration of the second batch of pulses, the first output of the conversion unit 4 will again be high, and the second output will be low. Due to the delay element 15, the And 12 element remains closed at the time of the occurrence of a high potential at the second output of the conversion unit 4, i.e. from the end of the first burst of pulses to the beginning of the second burst of pulses After restarting the generator 1 of the pulse bursts, the counters 3 again begin to fill up to the maximum value, and their operation is again monitored with the help of the AND 9, 10 control elements and the 5, 6 control triggers. In case of failure of the last digit of the counter, for example, when, in the process of counting pulses of the first packet, the last digit of the meter is; remaining in "1, remains in the unit

state, skipping output pulses,

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 ) TOANY packs; in the result, the corresponding element of the AND 9 control will be opened and set to "1 the corresponding trigger 5.

At the end of the burst, a high potential appears at the second output of conversion unit 4. At the same time, the AND elements of the control are opened at the second inputs, the element 12 is opened, the output potential of which is opened through the second inputs of the elements AND 8 and the driver 14 is started. The output pulse of the driver 14 is fed through the first input element AND 8 to the input of the first counter 3 tons. and then the consecutive overflow of the counters 3 begins. When overflow pulses appear, the outputs of the counters 3 open the corresponding elements of the AND 10 controls and are sequentially set to "1 flip-flops 6 contacts roll Thus, at the end of the second cycle of work, the health of the transfer chains can be judged by the state of the flip-flops.

6. Triggers 5 controls can provide additional information in case of a failure of the last digit of the counter.

The design features of the proposed technical solution allow:

,,. ,., .- increase the reliability of the control due to the fact that the elements at the input of each counter And remain closed during the device operation time (for 2 cycles) and open only at the moment of the last pulse generated by the SINGLE pulse pulse shaper

and causing a consistent overflow of all counters. Thus, the information issued by the control circuit will characterize as faulty only the OF counters in which

malfunction or failure;

to expand the scope of application as the analysis of the correct operation of the wasp oi, i ... 4,, j..j.

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counters at a specific time. Devices 6 can Control the operation of the meters, built both on static triggers and on any other elements.

Claims (2)

1.Patent of France No. 1582970, cl. H 03 K 23/00, 10.10.69. 2. The author's certificate 5 No. 518774, cl. G 06 F 11/10. 08.2576 (about .. totype).