SU746661A1 - Remote signalling device - Google Patents

Description

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The invention relates to the field of burglar alarm and can be used to tele-alarm the state of dispersed objects with a common wired communication line.

IJ devices are known for burglar alarms on the state of objects with a common wireline.

In such devices, a common two-wire communication link is used, however, the equipment volume is significant.

The closest to the technical essence of the invention is the device 2 for the Qyi television signaling system, which contains a generator, counter at the control room puykTo (DP), the first outputs of which are connected to the inputs of the decoder, the second output - to the first input of the signal conditioner. Vfhrd decoder is connected to the input of the block of called signals, the output of the signal conditioner through nepByip communication line is connected to the input of the controlled point (KP), the output of which through the second communication line is connected to the second input of the signal conditioner. and with tlepBEiM transfer of the meter to the PD.

A disadvantage of the known device is low speed.

The aim of the invention is to increase the speed of the device.

The goal is achieved by the fact that a control unit is inserted into the proposed device 5 at the DP, to the first input of which the output of the generator is connected. The output of the control unit is connected to the third input of the signal generator and to the second input 10 of the counter. The decoder gate is connected to the second input of the control unit and to the third input of the counter, and the third input of the control unit is combined with the second input of the driver 15 of the signals.

Diagram of the device shown in the Cher, too.

The device contains a generator 1, a counter 2, a ringing signal unit 3, a control unit 4, a decoder 5, a signal generator b, a polarity decoder 7, a shift register 8, the first element AND 9, the trigger 10, the second element AND 11, the OR element 12 and switching unit 13.,

The device works following ipaisoM. .

The generator 1 generates a sequence of pulses, which after 30 control unit 4 are fed to the third

the input of the counter 2 and the second input of the signal conditioner b. The signal conditioner 6 generates an advance pulse, which is then fed to the input of the decoder 7 of the polarity of the first gearbox. Counter 2, after the first pulse arrives at its third input from generator 1, generates a signal that arrives at the first input of the driver 6 and prepares for what it starts to generate from the pulses coming at its second input from the generator 1 and issue them to the input of the decoder 7 of the first KP. Clock pulses have a polarity opposite to the polarity of the pulse of gidrodvizhenie. The advance pulse through the decoder 7, the switching device 13 and the element 12 OR (the case of the normal state of the object) is fed to the input of the next gearbox. In the case of a normal state of an object, clock pulses pass through a decoder 7, an open second element 11 AND, and element 12 OR to the input of the next CP. The impulse of advancement, in case all KPs are in the normal state, immediately goes to the input of the PD. From the DP input, an advance pulse arrives at the input of the control unit 4, which by this signal blocks the output of the generator 1 pulses, to the third input of the signal generator 6, preparing it for generating the next advance pulse, and to the second input of the counter 2, reading its readings to the decoder 5. The decoder 5 outputs the corresponding readings of the counter 2 signal to the block 3 ringing signals. By this, the counter 2 is brought to the state O and the control unit 4 is unlocked. The device then works in a similar way.

If a violation occurs on one or several CPs (CPs work in the case of a violation in the same way), the Pulse Moves through the decoder 7 and the switching unit 13 enters the shift register 8 and the single trigger input 10. In this case, the trigger 10 switches and sends a signal to element 9 I. The following clock pulses come from the line decoder 7 and the open element 9 And to the input of the register 8 shift. The number of bits in register 8 is different for each control. The number of bits on the control is chosen so that

the sum of the number of bits in any of the 8 shift registers was not equal to the number of bits in one or more other 8 shift registers. One example of choosing the number of bits in shift registers 8 can be a series of numbers that are an integer power of 2. When entering shift register 8, having T bits, T clock pulses, the advance pulse from the output of the shift register 8 goes to the trigger input 10 and through the element 12 OR in the communication line with another KP. The trigger 10, upon receipt of a signal from the output of the shift register 8, switches and supplies a signal to the input of the second element 11 I. The subsequent clock pulses through the open element 11 AND and the element 12 OR enters the line. Thus, each j-th CP in which a violation occurred absorbs Tj clock pulses. Moreover, M Tj, where n is the number of KP. M is the width of the counter 2. Therefore, the advance pulse arrives at the DP input with a delay of F clock pulses, where F is equal to the sum of the bits in the 8 shift registers of the CP in which the violation occurred. Since the sum of bits in several shift registers 8 is not equal to the number of bits in one or several other shift registers 8, the readings of counter 2 unambiguously identify those controls in which the violation occurred. Thus, the KP survey cycle depends on the number of KPs in which the violation occurred and is equal to

q + +.,. + A „T, + 1, where C is the polling cycle of all KP in the proposed device, T -, the number of bits in the register

a shift in the nth KP, if a violation occurs in the nth KP,

 if there has not been a violation at the first KP.

In real alarm systems, all gearboxes are in normal condition. Infringements on KP, as a rule, are single, or at the same time no more than two or three KP. Comparing the survey cycle of the prototype and the proposed device, it is easy to see that

c1 4 C

The equality sign will be only in the case when violations occurred at once on all controls, which is practically unlikely.

Thus, the speed of the proposed device is improved.

Claims (1)

Invention Formula A device for remote signaling, containing a generator at the control room (DP), a counter, the first outputs of which are connected to the inputs of the decoder, the second output of the counter is connected to the first input of the signal conditioner, the output of the decoder. connected to the input of the ring signal block, the output of the signal conditioner through the first communication line is connected to the input of the monitored point.