SU1374228A1 - Pulse sequence checking device - Google Patents

Abstract

The invention relates to automation and computing, in particular to control devices. The purpose of the amphibious invention is to expand the functionality by controlling the duration of the monitored pulses. A distinctive feature of the device is that, firstly, the device allows controlling pulses that are longer than a predetermined value, secondly, to control the violation of an uninterrupted sequence of pulses, the device detects pulses with a duration less than a predetermined value, and detects the absence of a pulse any step of reading information. This goal is achieved through the introduction of the elements HE 2, 4, 6, 9, the generator of 7 pulses, the elements And 5, 10. 2 Il. (L

Description

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The invention relates to automation and computing, in particular to control devices.

The aim of the invention is to enhance the functionality by controlling the duration of the pulses in a controlled sequence.

FIG. 1 shows a block diagram of the device; in fig. 2 - timing diagrams of input and output signals, explaining his work (numbers of timing diagrams correspond to the numbers of the elements in Fig. 1).

The device contains a pulse shaper 1, a HE element 2, a pulse shaper, a HE 4, AND 5, a HE 6, a pulse shaper 7, a AND 8, a HE 9, A 10, a counter 11, a controlled sequence input 12 and a device output 13 .

The device works as follows.

When a high level 1 signal is received at the input, a high level 1 is also set at its output, after the transition

ten

the reset of the counter 11 has a signal 1, and at the output of the element And 8, at the counting input and output of the counter 1 there is a signal O.

Let us consider the first continuous η sequence of pulses C, Γ, where the incoming pulses σ have a duration longer than a given value Tjg ,. When the first impulse arrives at the input of the device, we have at the inputs of the HE 6 and I 8 elements a signal at the output of the HE 6 element, at the input of the HE 2 element, at the input of the 15 and 10 element, at the input of the pulse former 1 and the pulse O, at the output The pulse generator 1, at the input of the element HE 4 and at the input of the shapes of the body of three pulses the signal remains in state 1 for a time which is determined from the relation

20

25

ttf, md

where t, is the delay time of the shapes of the pulse body 1; is the specified duration value,

at the output of the imaging unit 3 pulse and at the input of the element And 5, the output

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at the input of the signal conditioner from the 30 element HE 2 and at the input of the element

And 5 - signal 1

at its output, the signal is 1 in 1 and O is left in the state of pulse formation, after which the signal at its output goes to the state O. The electronic time relay with an RC-setting chain can perform the function of a pulse generator .

35

signal 1 at the output of the element HE-4 and at the input of the element I 5 is an O signal, at the output of the element 5, the input and output of the element 8, at the input of the counter 11, At the input and output of the driver 7 pulses, at the input of the element NOT 9 is the signal at the output of the element HE 9 and at the input of the element AND 10 is signal 1, at the output jQ of which and at the reset input of the counter 11 is the signal O, while the first pulse of the first sequence of pulses ends the delay time forming a pulse 1 pulse, and a signal at its output, the input of a pulse generator 3 impulses and at the input of the element NO 4 It proceeds from state 1 to O. This leads to the appearance of a high level signal 1 and the output of element 4 and the input of element 5, during which the signal from state o goes to 1 and is at that level for time delay shaper 3 pulses

In the initial CONDITION, when there is no input signal at the input of the device and the pulse formation time of the formers 1, 3 and 7 is over, the inputs of the HE 6 and AND 8 elements have an O signal. At the output of the HE 6, at the inputs of the forma 1 of pulses, of the NO elements 2 and 10 there is a signal 1, and at the output of the pulse shaper 1, at the input and output of the shaper 3 pulses, at the inputs of the AND 5 HE elements 4 is the signal 1. At the outputs of the HE elements 2 and 4, at the first and second inputs of the element And 5 there is a signal O, and at the output of the element And 5, at the second input of the element And 8, at during and for- output pulses tors, 7 and 9 NOT element input - signal G. The output element is not 9 at the first input and output of the AND element 10 and the inlet

0

the reset of the counter 11 has a signal 1, and at the output of the element And 8, at the counting input and output of the counter 11 is the signal O.

Consider the first continuous sequence of pulses C, where the incoming pulses o have a duration longer than a given value Tjg ,. When the first impulse arrives at the device input, we have a signal 1 at the inputs of the elements HE 6 and AND 8, NOT 6 at the element output, NO 2 at the input of element 5, and 10 pulses at the input of the pulse driver 1, the signal O, at the output of the driver 1 pulse, at the input of the element HE 4 and at the input of the driver 3 of the pulse, the signal remains in state 1 for a time, which is determined from the ratio

0

five

ttf, md

where t, is the delay time of the pulse former 1; - is the specified duration,

the output of the imaging unit 3 pulses and the input element And 5, the output

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And 5 - signal 1

signal 1 at the output of the element HE-4 and at the input of the element I 5 is the signal O, at the output of the element And 5, at the input and output of the element And 8, at the counting input of the counter 11, At the input and output of the imager, 7 pulses, at the input of the element NOT 9 - signal O, at the output of the element NOT 9 and at the input of the element 10; signal 1, at the output of which and at the reset input of the counter 11 - signal O, Even during the first pulse of the first pulse sequence, the delay time of the driver 1 ends pulses, and the signal at its output, the input of the driver 3 pulses and at the input of the NOT 4 transitions from state 1 to O. This leads to the appearance of a high level signal 1 and the output of the element 4 and the input element I 5, at the output of which the signal from the state O goes to 1 and is at that level against the delay time of the driver 3 pulses.

which is determined from the ratio

tcpj - Oh ass,

where t a, j the delay time of the driver 3 pulses i

H is the step of arrival of the information being counted, if the condition is fulfilled (St, -T, od) t

If X1e, tjpi, then at the output of the pulse generator 3 there is always a signal 1, and the pulse duration at the output of the AND 5 element is determined by the falling edge of the pulses at the outputs of the HE 2 and 4 elements. and the output of the imaging unit 7 pulses at the input and output element And 8, on the counting. the input of the counter 11, the signal from the state O goes to 1. At the output of the element NO 9, the input and output of the element AND 10 and the reset input of the counter 11, the signal goes from state 1 to O. Thus, the first pulse of the first pulse sequence is entered in counter 11. Upon receipt of subsequent pulses of the first sequence, transients are of a similar nature. The delay time of the driver 7 pulses is determined from the ratio

sre

 H,

where the delay time of the driver 7 pulses; H - arrival step

information

This leads to a steady state of a high level of the signal 1 at the output of the pulse shaper 7 and provides the signal O V at the reset input of the counter 11, which makes it possible to add to the counter 11 continuous

a sequence of pulses (for example, with n 4, where n is a predetermined number of pulses in a continuous sequence) and receive a signal 1 at the device output (at the step of a fourth pulse of the first pulse sequence,)

Let us consider the second sequence of pulses Td, in which at the second step the input pulse has a duration less than a given value, and at the fourth step is completely absent. In this case, at the second and fourth steps of reading information at the output of pulse generator 1, there is always a signal 1, which leads to signal O at the output of the element HE 4 and at the input of the element AND 5, therefore, at its output as well

5 0 5

0

five

0

0

five

Claims (1)

At the output of element 8 and at the counting input of counter 11, signal O. In addition, at the output of the pulse shaper 7, the signal from the 1 to O state changes at the second and fourth steps, then at the output of the element 10 and at the reset input of the counter 11 a reset signal 1, which brings the counter 11 to the zero state. Thus, the pulses in the first and third steps of the second sequence a will not be counted by the counter 11 after the arrival of the reset signals in the second and fourth steps, respectively. Invention Formula A device for controlling a sequence of pulses containing a counter, two pulse shapers and a first element AND, the input of the controlled sequence of the device being connected to the first input of the first element AND, characterized in that, with the aim of extending the functional capabilities, by controlling the duration of the pulses in the controlled sequences, a third pulse generator, two AND elements, four NOT elements, the input of the controlled sequence of the device connected to One of the first element is NOT, the output of which is connected to the input of the first pulse generator, with the input of the second element and the first input of the second element, And the second input of which is connected to the output of the third element NOT, the input of which is connected to the output of the second pulse shaper, whose input is connected to the output The third element And with the second input of the first element And, the output of the first pulse shaper is connected to the input of the third pulse shaper and the input of the fourth element HE, the output of the third pulse shaper with It is connected to the first input of the third I element, the second input of which is connected to the output of the fourth element NOT, the third input of the third element I is connected to the output of the second element NOT, the output of the second element I is connected to the reset input in O of the counter, the output of the first element I connected with a counting INPUT4 counter whose overflow output is a device output. Wue.z