SU1188870A1 - Device for checking generators of pulse signals - Google Patents

Description

The invention relates to automation and computing and can be used to troubleshoot complex pulse devices. five

The aim of the invention is to enhance the functionality by ensuring the control of pulse shapers operating at random, independent points in time.

I

In the drawing, a diagram of the proposed device for monitoring pulse drivers.

The device contains a pulse generator 1, element 2, counter 3, switches 4, 5, element 6 or 6, inverter 7, driver 8 reference signals, equivalence element 9, 20 time selector 10, short-circuit trigger 11, element 12 OR, block 13 indications, the second group of 14 inputs that form the bus for trigger signals of pulse formers, the first group 25 of 15 inputs that form the bus for output signals of pulse normalizers, the third reset input 16, a short-circuit trigger 17, the pulse generator 1 is connected to the input element 30 and 2, the remaining inputs to Oogo connected to the inverted outputs of the triggers 11 and 17, and the output with the input of the counter 3, the output of which is connected to the control inputs of the switches 35 4 and 5 and the information input of the display unit 13, information, the inputs of the switches 4 and 5 are connected respectively to groups of inputs 14 and 15, the output of the switch 4 is connected to the input of the shaper 8 of the reference signals, the output of the switch 5 is connected to the input of the equivalence element 9, the other input of which is connected to the output of the shaper 8 of the reference signals 45, and the output through the time selector 10 n with a 5-input trigger 17, the K-input of which is connected to the input 16, and a direct output - with the control input of the display unit 13, the output of element 6 OR through the inverter 7 is central with the K-input of trigger 11, the first inputs of the element OR 6 are connected to a group of 15 inputs, and the second input is connected to the output of the driver 8 55

reference signals, and the outputs of the switches 4 and 5 through the element OR 12 are connected to the 5-input trigger 11.

The device works as follows.

Controlled drivers of pulse signals (not shown) produce pulses of a given duration when the corresponding trigger signals arrive at their inputs.

The trigger signals of pulse formers are received by a group of 14 inputs to the inputs of switch 4, and the monitored pulse signals are received by a group of 15 inputs to inputs of switch 5.

Suppose that in the initial state there are no start-up signals or monitored output signals of pulse shapers. At the same time, none of the inputs of the element OR 6 have a single signal, which leads to such a state of the trigger 11, in which the logical "1" signal is sent to the input of the And 2 element. The signal at the input 16 of the reset trigger 17 is also transferred to a state in which the logical input “1’ ’” is given to the corresponding input of the element 2. When this pulses from the generator 1 pulses through the element And 2 is fed to the input of the counter 3, which, acting on the control inputs of the switches 4 and 5, connects to the input of the shaper 8 reference signals alternately start signals of the monitored pulse formers, and to the input of the equivalence element 9 - the reactions of the corresponding Amortizers. On the element 9 equivalence, these reactions are compared with the output signal of the shaper 8 reference signals.

In the absence of start-up pulses on a group of 14 inputs, zero signals on both inputs of the equivalence element 9 characterize the healthy state of the monitored devices. The appearance of a non-zero signal at the output of the switch 5 leads through the element 12 OR to a change in the state of the trigger 11, which closes the passage of pulses through the element AND 2 to the counter 3, which stops the counting on the number of the faulty channel. The difference in the signals at the inputs of the element 9 of equivalence (zero signal shaper 8 reference signals and a single signal of a faulty channel from the output of switch 5) leads to the appearance of a single

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signal at the output of the element 9 equivalence. This signal through the time selector 10 changes the state of the trigger 17, a single signal at the direct output of which turns on the block 13 5

indication, which highlights the number of the faulty channel, and the zero signal at the inverse output, trigger 17 blocks the passage of pulses through the AND 2 element until the enable signal 10 appears at the reset input 16.

When a trigger signal appears at the input of any of the pulse signal formers, this signal should appear at the output of the switch 15 4, while, if we denote the duration of the start pulses, the connection time of one input signal to the output of the switch 4 (equal to the pulse repetition period 20 pulse 1 pulse), the number of pulse formers Ν, which, can be controlled by one proposed device for control, is determined by the formula

m * · - * ’** o>

¹ to

Since only when this inequality is fulfilled, none of the pulses of the controlled pulse formers will be “missed” by the switch 4 ”, ³ θ

The appearance of a trigger pulse at the output of switch 4 leads to an on-. the driver of 8 reference signals, while a pulse signal of the required 35 duration appears at its output, in addition, a single signal from the output of switch 4 through the OR 12 element changes the state of trigger 11, which again stops the counter 3, this time at the number of the control unit channel, and if the controlled channel, and therefore, the output of the switch 5 is not. a pulse signal will appear, the difference in signals at the inputs 45 of the equivalence element 9 will again trigger the trigger 17, highlighting the number of the faulty channel on the block. 13 indication and stopping of the counter 3 until the start signal appears at the input 16 of the reset.

In the case, if the monitored channel is healthy, a pulse signal will appear at the output of switch 5.

This signal can be ahead of the signal 55 from the output of the shaper of 8 reference signals, which does not turn on at the moment of the appearance of a trigger pulse on

any channel, but at the moment when this pulse appears at the output of switch 4, i.e., for the time T <

6 (Ν - 1) <\ later.

The time selector 10 transmits pulses only with a duration of more than Ν, therefore, the discrepancy in the response time of the reference and controlled pulse shaper (when it is in proper operation) is not. will change the state of the trigger 17..

After any pulse shaper is monitored and a fault is not detected, the analysis of the remaining channels continues only when the formation is completed. all pulse signals in all drivers that operated simultaneously with the driver, the start pulse on which was detected first and which, therefore, was subject to control, and at the output of the driver of the other signals.

When this zero signals on all inputs of the element OR 6 lead to the switching of the trigger 11 in the zero state and the start of the counter 3.

Given that the trigger signals to the pulse shapers come at arbitrary, independent moments in time, it can be argued that all pulse shapers are alternately controlled.

Shaper 8 reference signals can be made in different ways. So, if the monitored pulses have the same duration, its circuit can be similar to the circuit of monitored pulse shapers (for example, a waiting multivibrator).

If the monitored pulses have different durations, then the imaging unit 8 can be made on the basis of well-known converters code - time interval (PKVI) and read-only memory (ROM).

In this case, the counter code 3 must also be sent to the address inputs of the ROM, the code defining the required duration is generated at the output of the ROM. This code is fed to the input of the PCVI, which, upon receipt of a start pulse from the output of switch 4, generates a reference pulse of the corresponding channel, determined by the state of counter 3.

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Claims (2)

A DEVICE TO CONTROL FORMULATORS OF PULSE SIGNALS containing a pulse generator, an element AND, the first element OR, an inverter, two triggers, the first inputs of the first element OR are connected to the first group of device inputs, and the output through the inverter is connected to the K-input of the first trigger, differing from that, in order to expand the functionality, a counter, two switches, a second OR element, a driver of reference signals, a display unit, an equivalence element and a time selector, whose input is connected to the course of the element of equivalence, the first input of which is connected to the output of the shaper of reference signals and the second input of the first OR element, the second input of the element of equivalence connected to the output of the first switch and the first input of the second OR element, the second input of which is connected to the output of the second switch shaper reference signals, the output of the second element OR is connected to the 5 input of the first trigger, the inverse output of which is connected to the first input of the element I, the second input of which is connected to the output of the generator and pulses, and the third input - with the inverse output of the second trigger, the direct output of which is connected to the first input of the display unit, the second input of which is connected to the output of the counter and the control inputs of the first and second switches, the input of the counter device inputs connected. with the inputs of the first switch, the second group of inputs of the device is connected to the inputs of the second switch, the K-input of the second trigger is connected to the third input of the device, and 8-input with the output of the time selector. Ω one "188870 2