SU860298A1 - Device for checking pulse sequences - Google Patents

Description

C54) DEVICE FOR MONITORING PULSE SEQUENCES

one

The invention relates to automation and pulse technology and can be used in automation devices, discrete action to control sequences of variables according to the number of pulses.

Known devices control the sequence of pulse sequences, containing input and output buses, triggers, logic gates, AND, block, block, pulse distributors 1.

The disadvantages of such devices are that they are designed to control the ordering of only individual ones. pulses and do not allow checking the sequence of the series of pulse sequences and the number of pulses in the series.

The closest in technical essence to the present invention is a device comprising input and output buses, a trigger, AND and OR gates, a prohibition unit. In the known device, the number of pulses and the series are monitored by combining one group of input buses both in AND and OR, and the OR element, if there is at least one pulse in the series, changes the state of the trigger, which causes the signal to input elements And, representing a block ban. The logical element And, in the presence of all signals in the series, prohibits the passage of a signal from a trigger to the output bus 2.

However, the known device does not

15 allows one to control the sequence of pulse sequences and does not provide the ability to control a series of sequences that vary in the number of pulses.

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The purpose of the invention is to expand the functionality of the device in terms of the sequence control of pulse-cioiix sequences, variables

by the number of controlled pulses in the series.

To achieve the desired goal, the device for controlling pulse sequences containing input buses, a trigger, a logical element AND, a logical element OR, a prohibition block, a switch for the number of pulses in series, the output of which is connected to the first inputs of logical elements AND and OR, and the input The bus of the previous series of pulses is connected to the second inputs of the logic element I, the output of which is connected via a trigger with the inverse input of the prohibition unit, and the incoming bus of the next series of pulses are connected to volts rymi rsi inputs of NAND gate whose output is connected to the direct input of the prohibition.

The drawing shows a block diagram of a device for monitoring pulse sequences, with input buses 1, reconfigurable logic element 2 AND, trigger 3, switch 4 number of pulses per series, reconfigurable logic element 5 OR, block 6 prohibiting output bus 7.

Before starting operation, switch 4 selects the configuration of logic elements 2 and 5 in accordance with the controlled number of pulses in the series. The previous series of pulses passing through the busses 1 - Cnto comes to the inputs of logic element 2, from the output of which the signal goes to the input of the trigger 3, which changes its state under the action of the signal. From the output of trigger 3, the signal enters the inverse input of block 6 of the prohibition, thereby prohibiting the signal from the output of logic element 5 to the output bus 7. The subsequent series of pulses passing through 1 and In flows fuel to the inputs of the logic element 5. From the output of logic element 5, the signal is fed to the direct input of the prohibition unit 6. In the absence of a fault, none of the pulses passes to the output bus 7.

If in the process of monitoring the sequence of a series of pulses is violated, for example, the subsequent series comes

earlier than the previous one or the number of pulses in the series does not correspond to the controlled one, then the output of trigger 3 does not receive a signal at the inverse input of the prohibition unit 6, which is why the signal from the output of logic element 5 passes to the output bus 7, revealed a fault.

The effectiveness of the described device is expressed in extending the functionality in several directions. The device allows controlling the sequence of not only individual pulses, but also

5 series consisting of any number of pulses. Simultaneously with the control of the sequence of a series of pulse sequences, the number of pulses in a series is checked. In addition, this device eliminates the need to develop a number of similar devices that control different number of pulses in a series. This results in improved quality.

5 control multichannel discrete devices while reducing its cost.

Claims (2)

Invention Formula A device for controlling pulse sequences containing an input bus ;, trigger, logic element AND and logic element OR, a prohibition unit, characterized in that, in order to expand the functionality of the device, the device has a switch for the number of pulses in series, the output of which is connected with the first inputs of the logical elements And and OR, while the input bus of the preceding series of pulses is connected to the second inputs of the logical element And, the output of which is connected via a trigger to the inverse input of the blzka apreta and input pshny subsequent series of pulses IMG connected to second inputs of the OR gate, whose output is connected to the direct input of the prohibition. Information sources, . 5 taken into account in the examination 1t USSR Author's Certificate No. 491024, cl. H 03 K 5/18, 1975, 2. For the application of the Federal Republic of Germany No. 20382 P, cl. H 03 K 5/18, 1975 (prototype).