RU1824646C - Device for remote alarm indication - Google Patents

Abstract

The invention relates to automation and telemechanics and can be used in telemechanical systems for transmitting information from controlled objects. The aim of the invention is to expand the scope of the device by making it possible to detect a sensor circuit that has changed state. The telealarm device comprises information channels 1 and a switching unit 2. Each information channel includes a pulse generator 3, a group of frequency dividers 4, a frequency divider 5, sensors 6, a group of elements AND 7, and an OR-NOT element. The switching unit consists of the first 11 and second 12 groups of AND elements, a group of flip-flops 13, a group of delay elements 14 and an OR element 15. The device provides the possibility of detecting at the monitoring station the sensor circuit that has changed its state. 1 ill.

Description

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The invention relates to automation and telemechanics and can be used in telemechanical systems for transmitting information of controlled objects.

The purpose of the invention is to expand the scope of the device by making it possible to identify a sensor circuit that has changed state.

The drawing shows a block diagram of a device for tele-signaling from two objects containing three sensors each.

The telealarm device comprises information channels 1 and a switching unit 2. Each information channel includes a pulse generator 3, a group of frequency dividers 4, a frequency divider 5, a sensor 6, a group of elements AND 7, an element OR NOT. The drawing shows a group 9 of the input and output 10 of the device. The switching unit 2 includes the first 11 and second 12 groups of AND elements, a group of triggers 13, a group of delay elements 14, and an OR element 15.

The device operates as follows.

When the state of any of the circuits of the monitored object changes, at the output of one of the sensors 6 connected to this circuit, a signal is generated that enters the input of the corresponding

7 and allowing the passage of pulses through it from the corresponding frequency divider 4 and frequency divider 5. As a result, the superposition of pulses from the output of the corresponding AND element 7 through the OR-NOT 8 element goes to switching unit 2.

8 on the switching unit, 2 pulse sequences are supplied to the corresponding input of the And 11 element, the other input of which receives high levels of signals from the inertial outputs of the triggers 13, ensuring that the pulse sequence arrives at the first input of the trigger 13, translating it into a single state. Thus, the train of pulses from the output of the information channel 1 through the AND element 12 and the OR element 15 will go to the output 10 in the communication line. At the same time, the sequence of pulses from the output of the And 11 element will arrive at the delay element 14 (the delay time of the pulses in which is equal to the time required to transmit information from the object to the line about changing its parameters) from the output of which it will go to the second input of trigger 13, which will ensure installation trigger 13 to the zero state. As a result of this, at the direct output of trigger 13, a low signal level occurs, prohibiting the passage of a train of pulses into the line. At the same time, a high signal level from the second output of trigger 13 will go to the second inputs of AND 11 elements, removing the ban on passing through

them pulse sequences. Thus, it is possible to connect information channels to the communication line with the possibility of determining at the monitoring point of the sensor circuit that has changed its

condition.

Claims (1)

SUMMARY OF THE INVENTION A device for a telealarm system, comprising sensors in each information channel, the outputs of which are connected to the first inputs of the corresponding AND elements, a pulse generator, the output of which is connected to the combined inputs of the frequency dividers and group frequency dividers, the outputs of the group frequency dividers are connected to the second inputs of the corresponding AND elements, the outputs of which are connected to the corresponding inputs of the OR-NOT element, characterized in that, with In order to expand the scope of application by providing the possibility of automatic detection of the sensor circuit that has changed its state, a switching unit is introduced into it, made on the AND elements of the first and second groups of delay elements, triggers and the OR element, the output of the frequency divider in each information channel is connected to the third inputs of AND elements, output of an element OR NOT connect to the input of the corresponding element AND of the first group and the first input of the corresponding element and second group in the switching unit, the output of each element Enta And the first group is connected to the first input the corresponding trigger and through the corresponding delay element to the second input of the trigger, the direct output of which is connected to the second input of the AND element of the second group, the outputs of the AND elements of the second group connected to the corresponding inputs of the OR element, the output of which is the output of the device, the inverse output of each trigger is connected to the corresponding input of the group of the corresponding element and the first group.