SU1624674A1 - Device for checking multichannel pulse sequences - Google Patents

Abstract

The invention relates to a pulse technique and can be used in computing and control systems of information processing equipment. The purpose of the invention is to increase the reliability of the control and expand the functionality. Improving the reliability of control is achieved by eliminating the effect of switching noise. Expansion of functionality is achieved by allowing the indication of the number of a faulty channel. The device contains a one-shot 1. counter 2, multiplexer 3, input buses 4. To achieve the goal, a drive 5, a one-shot b with restart, the element OR 7 and a fault recorder 8 are entered into the device. 1 hp ff. 2 Il.

Description

1

The invention relates to a pulse technique and can be used in computing and control systems of information processing equipment.

The purpose of the invention is to increase the reliability of monitoring by eliminating the influence of switching noise and extending the functionality due to the possibility of indicating the number of the faulty channel.

FIG. 1 shows a structural electrical circuit of the device; in fig. 2 - timing diagrams for the operation of the device.

The device contains a one-shot 1, a counter 2. a multiplexer 3, input buses 4, a drive 5, a one-shot 6 with restart, the element OR 7 and the recorder 8 is incorrect.

The outputs of counter 2 (the 1st output is the output of the higher bit) are connected to the control inputs of multiplexer 3 and the corresponding information inputs of the fault recorder 8, the control input of which is connected to the reset input of drives 5, the output of the one-oscillator 1 and the first input of the element OR 7, the second input of which is connected to the output of accumulator 5 and the input of one-shot 6 with restart, and the output - to the synchronization input of counter 2.

The information inputs of the multiplexer 3 are connected to the input buses 4 of the device, and the output of the multiplexer 3 is connected to the input of the accumulator 5. The output of the single-oscillator 6 with overwriting is connected to the input of the one-oscillator 1.

The device works as follows.

The drive 5 accumulates a predetermined number of K pulses of the monitored sequence. After the K-th pulse arrives at its input, the output pulse of accumulator 5 is formed and its self-reset to the initial (zero) State.

The one-shot 6 restart limits the analysis time of the monitored channel. After the channel analysis time has expired, the one-shot vibrator 6 with a bypass produces a single-shot trigger signal 1, which forms a short pulse. The analysis time Ta must be at least the maximum required accumulation time, i.e .: 1

min

where fMHH is the smallest pulse frequency in the controlled multichannel sequence.

The fault recorder 8 displays the numbers of the faulty channels. The recording of the number of the faulty channel is carried out from its information

inputs pulse arriving at its control input.

In the initial state of the device on the output bus of the counter 2 there is a code that goes to the control inputs

0 of multiplexer 3. As a result, one of the monitored channels is connected through multiplexer 3 to the input of accumulator 5 and, thus, the pulses of the controlled channel arrive at input 5 of accumulator 5. After the K-th pulse arrives at the input of accumulator 5, an output pulse is formed (Fig 2a, the moment ti), which starts the one-shot b with restart, and also through the element

0 OR 7 is fed to the input of counter 2. This changes the code at the outputs of counter 2 and multiplexer 3 connects the input of accumulator 5 to the next of the monitored channels.

5If the monitored channels are healthy, the output impulse of accumulator 5 restarts the one-shot 6, because the accumulation time is less than the analysis time (Fig. 2a, b, moments t2, t3, td).

0In case of connecting the drive 5 to

A defective channel time needed to accumulate K pulses will be longer than the analysis time, which leads to the 6V overdrive one-shot (Fig. 26, time t4) and the output one-time pulse (Fig. 2c, moment C) 1. This pulse resets drive 5 to its original state, writes to the fault recorder 8 fault number

0 of the faulty channel, as well as through the OR element 7, is fed to the input of counter 2. This changes the code at the output of counter 2 and multiplexer 3 connects the input of accumulator 5 to the next of the monitored channels.

To eliminate switching noise

the number K must be greater than 1 (K 1). With

an increase in the number of K reliability of control

rises. The number K is selected from the considerations of ensuring the necessary reliability of the control and the minimum polling time of all the monitored channels.

Thus, the proposed device can significantly improve the reliability of control by eliminating the effect of switching noise. In addition, the device does not stop the monitoring process on the first detected non-correct channel, but continues it and is capable of displaying

The recorder has 8 malfunctions of the number of all failed channels. The proposed device makes it possible to estimate the pulse frequency in the monitored channels: the channel is considered to be faulty if the pulse frequency in it

fi fep, 1

where fcp: t is the frequency of the comparison.

I a

This makes it possible to significantly reduce the search time for a faulty channel and, thus, to increase the utilization rate of communication channels or other equipment.

Claims (2)

Claim 1. A device for controlling multichannel pulse sequences containing a single vibrator, a multiplexer, the control inputs of which are connected to the outputs of a pulse counter, and information inputs to the input buses of a device, characterized in that Q UA five 0 to increase the reliability of the control,. A drive, a one-shot one-shot and an OR element are entered into it, the first input of which is connected to the drive's output and the one-shot input with restarting, the second input is connected to the one-shot output, and the output to the synchronization input is a pulse counter, the multiplexer output is connected to the input of the drive A single-output output with restarting is connected to the input of a one-shot, the output of which is connected to the reset input of the drive. 2. The device according to claim 1, comprising a fault recorder, the first input of which is connected to the first output of the pulse counter, characterized in that, in order to enable indication of the number of the faulty channel, the fault recorder is equipped with the second to nth inputs, which are connected to the corresponding outputs of a pulse counter and a control input, which is connected to the output of a single vibrator. O 6 u P ABOUT (l about about P PLL 2 J „H 5 Thebes. 2 P I about    „H 5 Thebes. 2 H