SU720460A2 - Remote alarm device - Google Patents

Description

Ierbreteniv belongs to the field of telemechanics, it can be used in tele-alarm systems with temporal separation of signals when transmitting information from a dispersed object to a control center. It is known a remote signaling device containing a clock pulse generator, information distributor, control point selection distributor, linear elements, control keys, code converter, display and signaling units, and information distributor, clock generator, linear nodes, lochgic elements, trigger, at the control points. choice of controlled item C1. In this device, with the help of clock generators, information distributors of dispatching and controlled points are started, with the last output of the information distributor; the control room drives the selection control valve of the control points. Thus, each (one) work cycle of the information distributor corresponds to one step in the work of the coasting points distributor of controlled points, i.e., the dispatch point is alternately connected with each of the controlled points. A disadvantage of the known device is the ability to select two or more controlled items as a result of valve failures, which can lead to false reproduction of information. The closest in technical essence to the proposed is a remote signaling device containing a node for protection against a false choice of monitored items, one input of which is connected to the last output of the distributor. information of the controlled point, another input is connected to the output of the synthesizing node, and the output is connected to the input

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setting to zero the trigger for the controlled point C2.

A disadvantage of the known device is the possibility of transmitting to the dispatch point false information in case of disruption of the synchronous operation of the information distributor of the controlled point, which may occur as a result of the effects of interference and a long stop (during two or more cycles) of the last trigger of its binary counter. the binary counter triggers (except the last one) will work (switch) normally, and the failed trigger will be in position 1 (or O), at which output ah distributor information destined respectively for reception of the signals at the controlled selection item and the incoming pulse sikfazi- tion will promptly on, output signals is employed. In this case, the trigger for selecting a controlled point may be in a position where information is allowed to be transmitted at the bottom of the fire station even if there is no call from the latter.

The aim of the invention is to improve the noise immunity of the device.

The goal is achieved by the fact that a block of the transmission of false information is inserted into the device, performed on the delay element and on the non-equivalence element, the last output of the distributor is connected to the first input of the unequal-value element via the delay element, the first output of the distributor is connected to the second input element of inequality, the output of which is connected to the installation input of the trigger selection of the controlled item.

Diagram of the device shown in the drawing.

The device contains a receiver of signals 1, a communication line 2, a node sizhirovININ 3, a clock pulse generator 4, an information distributor 5, a trigger for selecting a controlled item, elements AND 7, 8, 9, 10, signal sensors 11 element OR 12, element 13, element OR 14, alarm transmitter 15, block of protection against a false choice of controlled items 16, block of protection against transmitting false information 17. performed on the delay element 18 and the element of inequality 19.

The device works as follows.

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When the power is turned on, the clock pulses from the input clock of the clock pulse generator 4 are received;

its in motion. Signals of a choice of monitored points and a signal of synphation formed at the end of the operation of the information distributor are transmitted to the link 2 and through it are received at all controlled points by the receiver of signals 1. The output signal from the trigger trigger of the controlled point 6 is fed to the inputs all elements 8, 9, 10. At the appropriate step (output) of the information distributor 5, signals which temporal position respectively determine the type of emergency state of the objects come to the second inputs of the same points (elements 8 ), the state of a two-position object, the element I 9, and the type of malfunction of the remaining 1 device and is controllable; At the third entrance of the elements And 8, 9 arrives

The signals from the sensors of the alarm 11, the emergency and normal state of the monitored objects, and the third input of the element AND 1O through the element NOT 13 and the element OR 12 receive signals only from the sensors of the signals 11 of the emergency state of the monitored objects. The signals from the output of elements 8, 9, 1 through the elements OR 14 are sent to the alarm transmitter 15, which transmits them to link 2, Thus, after receiving the trigger 6 for selecting the monitored item of the select signal of this monitored item, the transmission of tele-alarm messages from the monitored

, Nj-nkta to the control room will be resolved in the next cycle, after the siphasing pulse. Signals to select monitored items are formed before the sync pulse, for example, at the end of a dispatcher-item information distributor cycle after a temporary position allocated for receiving tele-alarm messages. Therefore, in case of a false choice of the controlled point, which occurred from the desynchronization of the dispatcher's information and the controllable putak, the remote signaling message is not from: -: 1) is transmitted until the end of the operation cycle of the distributor of information divider of the controlled

point, At the same time, the mismatch of the signal from the output of the sync node 3 and the signal from the last) output of the control information distributor of the 7th point

Claims (1)

SUMMARY OF THE INVENTION testimonial. No. 399901, with the proviso that, in order to increase the noise immunity, a protection block against the transmission of false information implemented on the delay element and on the unequal element is introduced into it, the last output of the distributor through the delay element is connected to the first input of the disambiguation element, the first output of the dispenser is connected to the second input of the disambiguation element, the first output of which is connected to the installation input of the trigger for selecting the item to be monitored.