RU10308U1 - DEVICE FOR CONTROL OF DAMAGES OF MULTI-CHANNEL PULSE SEQUENCES - Google Patents

Abstract

A device for monitoring the disappearance of multi-channel pulse sequences, comprising a block for detecting the disappearance of pulse sequences and a chain of triggers connected in series, the output of the previous trigger connected to the information input of the subsequent trigger, and the inverse output of the last trigger of the circuit connected to the information input of the first trigger, the outputs of the triggers form a group of code outputs a missing pulse sequence, the clock inputs of the triggers are connected to the corresponding buses monitored sequences, characterized in that a discontinuity element is inserted into it, the inputs of which are connected to the outputs of the triggers of the sequential circuit, and the output of the discontinuity element is connected to the input of the impairment register of impulse sequences.

Description

Device for monitoring the disappearance of multi-channel pulse sequences

The utility model relates to pulsed technology and can be used in communication systems, automation, and instrumentation to control the absence of pulses of one or more monitored sequences at a given time interval. Devices for monitoring pulse sequences are known (see, for example, A device for monitoring a sequence of pulses by AS No. 1064444, A device for monitoring a series of pulses by AS F 1064445 and W 262709, A device for detecting loss of pulses by AS .} f II32356, Device for monitoring the disappearance of multi-channel pulse sequences according to AS No. 1432756).

Closest to the technical nature of the claimed utility model is a device for monitoring the disappearance of multi-channel pulse sequences by AS F-1432756, author Steinmanis GV, containing a block for registering the loss of impulse sequences, shsh controlled sequences and a chain of serially connected triggers, the output of the previous trigger connected to the information input of the subsequent trigger, and the inverse output of the last trigger of the circuit connected to the information input of the first trigger circuits, the outputs of the triggers form a group of outputs of the code of the missing pulse sequence, and the clock inputs of the triggers of the circuit are connected to the corresponding busbars troliruemyh sequences.

of the prototype, Fig. 3 shows an embodiment of the technical implementation of the unit for detecting the absence of pulsed signals at a given time interval by changing the level of constant voltage at the output.

The device contains P. triggers I.I - 1.P, inputs 2.1 - 2.P

controlled sequences and sequences, group of outputs 4.1 - 4.P code of the missing sequence and block 3 registration of the disappearance of impulse sequences. Due to the high regularity of construction and the presence in it of only one node with time-delaying elements (block 3), the device is convenient for implementation in an integrated version.

The disadvantage of this device is the ability to control with its help only a relatively small number of pulse sequences, which is due to the presence of block 3 timing elements. A disadvantage can also be attributed to the need for readjustment of unit 3 even with a slight increase in the number of monitored pulse sequences, since a decrease in the frequency of pulses at the input of unit 3 can lead to the appearance of zeros at its output during good operation.

The objective of the claimed utility model is to provide the ability to control any number of pulse sequences with one device.

The technical result achieved by the utility model consists in the possibility of using the device to control any number of pulse sequences without the readjustment of the last missing block.

To achieve the indicated technical result, a device for controlling the disappearance of multi-channel pulse sequences, comprising a block for detecting the loss of pulse sequences and a chain of triggers connected in series, the output of the previous trigger being connected to the information input of the subsequent trigger, and the inverse output of the last trigger

the circuit is connected to the information input of the first trigger, the outputs of the triggers form the group of outputs of the code for the missing pulse sequence, the inputs of the triggers are connected to the corresponding controlled sequences, the ambiguity element is introduced, the inputs of which are connected to the outputs of the triggers of the serial circuit, and the output of the ambiguity element is connected to the input of the registration unit loss of pulse sequences.

The essential features distinguishing from the prototype and necessary in all cases to which the requested amount of legal protection applies include the newly introduced element with its connections, because they are necessary to achieve the specified technical result.

In FIG. T and 2 show embodiments of a proto-teegradia block device

In FIG. Figure 3 shows a variant of the technical implementation of the loss of pulse sequences.

In FIG. 4 shows a functional diagram of the claimed useful

models.

In FIG. 5 is a timing chart explaining the nature of the differences between the pulse sequences generated at the input of the registration unit of the prototype device and the claimed utility model.

In FIG. 6 shows a variant of the technical implementation of block 3

registration of the disappearance of pulse sequences.

In FIG. 7 is a timing chart explaining the operation of circuit elements of the device of FIG. 6.

The inventive utility model contains a chain of series-connected triggers II - IM, inputs 2.1 - 2.P of controlled pulse sequences, a unit for registering the disappearance of pulse sequences 3, a group of outputs 4.1 - 4.K1 code of the missing pulse sequence and an element of disambiguation 5. The output of the previous t) igger the serial circuit is connected to the information input of the subsequent trigger, and the inverse output of the last trigger (l.L) of the circuit is connected to the information input of the first trigger (ll). The outputs of the “triggers 1.1 - 1.P form a group 4.1 - 4. / outputs of the code of the missing pulse sequence. The clock inputs of triggers I.I - I./7 are connected to the corresponding bus of the controlled sequences 2.1 - 2.P, and the outputs of the triggers T.I - T.G are connected to the inputs of the disambiguation element 5, the output of which is connected to the © input of the block 3 for recording the disappearance of pulse sequences.

The operation of the device is as follows. Under the influence of pulses of the controlled sequences, the I.T - T.L triggers alternate their state and there are constantly impulse voltages at the output of the discontinuity element 5, and a signal corresponding to the correct operation at the output of the block 3 of the disappearance of impulse sequences.

If any of the controlled sequences of pulses disappears, the corresponding trigger stops switching, and all the others stop after it. Correspondingly, the pulse voltage at the output of the element of ambiguity 5 disappears and at the output of the block 3 for registering the disappearance of pulse sequences An alarm is generated. At the outputs 4.1 - 4.p of the device, the code of the number of the missing pulse sequence is set. In this state, the device remains until the missing pulse sequence is restored.

The main difference between the utility model and the prototype is that the frequency of the pulse voltages generated by it at the input of block 3 corresponds to the expression:

i 1

where A is the gap between the fronts of the pulses arriving on adjacent buses.

- the number of controlled sequences.

For comparison, the frequency of the pulse voltages generated by the prototype at the input of block 3, corresponds to the expression:

(2

where l is the number of controlled pulse sequences. From expression (2) it can be seen that the frequency decreases in proportion to the increase in the number of controlled pulse sequences, which entails the need for readjustment of unit 3.

In FIG. 5 shows timing diagrams of the formation of pulsed voltages by the claimed utility model for P 3 and A COnSt which is not necessary). From FIG. Figure 5 shows that the pulse frequency at the output of the discontinuity element 5 is several times higher than the switching frequency of any of the triggers in the serial circuit. Obviously, with an increase in частота, the switching frequency of the triggers I.I - I./7 decreases, and the pulse repetition rate at the output of the discontinuity element 5 remains unchanged.

It should be noted that the block 3 registration of the disappearance of impulse sequences (see Fig. 3) incorporates time-consuming elements, which does not allow to implement the device completely in an integral design. In addition, the reliability of the development by block 3 of the correct control result is relatively low due to the possibility of the appearance of single malfunctions in it, which do not lead to the generation of an error signal in the absence of pulse signals at the input. Examples include a faulty type of open circuit of the base of the output transistor, shorting it to a common wire, breaking the collector circuit of this transistor, and others.

The elimination of these disadvantages is possible when performing block 3 registration of the disappearance of pulse sequences according to the circuit shown in Fig. 6, FIG. 7 is a timing chart explaining the operation of circuit elements and the type of error signal.

-s with the help of triggers 3.1 3.2 and the discontinuity element 3.3, pulses equal to the duration of the clock cycles of the pulses coming from the source b of the clock sequence are generated from the edges and decays of the input signals. With these pulses, a binary counter 3.4, a trigger 3.7, and counting triggers 3.5.1 - 3.5.P are installed in O. In addition, these pulses through the OR 3.9 circuit arrive at the output of the device. In the intervals between them, the counter 3.4 counts the number of clock pulses arriving at its input and at the outputs of the counting triggers 3.5.1 3.5. A reflex is formed; a code (or Gray code) having a direct and reflected Ts1sistl, at the junction of which one and the same the same combination is repeated twice. This code feature is used to generate an error signal; in the absence of impulse signals at the input of block 3 during a time interval equal to or greater than the duration of the direct cycle. The error signal is generated in the form of a violation of the regularity of the pulses at the output of the element OR 3.9. Fixing this kind of distortion is carried out by known devices. Since the control is dynamic in nature, any single circuit malfunction (Fig. 6) leads to a distortion of the output control sequence, thereby increasing the reliability of obtaining the correct control result.

ёFormula

Claims (1)

A device for monitoring the disappearance of multi-channel pulse sequences, comprising a block for detecting the disappearance of pulse sequences and a chain of triggers connected in series, the output of the previous trigger connected to the information input of the subsequent trigger, and the inverse output of the last trigger of the circuit connected to the information input of the first trigger, the outputs of the triggers form a group of code outputs a missing pulse sequence, the clock inputs of the triggers are connected to the corresponding buses monitored sequences, characterized in that a discontinuity element is inserted into it, the inputs of which are connected to the outputs of the triggers of the sequential circuit, and the output of the discontinuity element is connected to the input of the impairment register of impulse sequences.