SU798931A1 - Alarm - Google Patents

Description

one

The invention relates to fire alarm technology and can be applied to guard objects equipped with signal circuits with electrical contact sensors and to transmit separate, independent control signals to centralized monitoring stations.

Devices are known for transmitting alarms from sensors to remote control centers, containing a relay loaded onto a loudspeaker and connected by one input to a modulator and the other to a time relay output, a control input of a time relay pushed to the on relay. which through intermediate transistors are connected by a signal circuit by contact sensors 1J.

However, such devices do not have a visual indication of the object being armed, cannot control several signal circuits, do not allow other active sensors or fire alarm devices to power the signal circuit, they do not have fire-intrusion signal separation.

The closest technical solution to the present invention is an alarm device comprising a generator, the output of which is connected to the first input of an AC key, the second input of which is connected to the output of the signal circuit, and the output to the control input of the DC switch, signal the input of which is connected to the first wire of the two-wire: communication line, and the triggering input through the start-up circuit - to the generator power bus, the output of the dc current key

5 is connected to the blocking input of the generator, the blocking node connected by one output to the alarm generation unit, the other to the alarm activation unit, one output

The generator 0 is connected to the input of the blocking node, and the other outputs are connected to the inputs of additional AC switches and inputs, the switch, the switch outputs via signal

5 circuits are connected to the first inputs of alternating current switches, connected to the inputs of a multi-input dc switch, a control input of the first control key via an additional signal circuit connected to the nepBQiviy communication line, the signal input to the generator power bus, the output is connected to the control input of the second controlled key, the signal input of which is connected to one of the inputs of the multi-input dc switch through the blocking element, and the output to the control input of the third controlled key; The second wire of the communication line is connected via a blocking element to the generator power bus and to the output of the alarm generation unit, the control input of which through the blocking elements is connected to the first wire of the communication line. the alarm is connected via blocking elements to the inputs of the multi-input dc switch, the outputs of the alarm activation unit are connected to the switch: torus 2.

This device has the following disadvantages:

when the device is triggered, information is transmitted to the monitoring station only one of any kind - fire or intrusion, while the remaining valid signal circuits are disconnected and are not controlled by the central monitoring console for the entire time the device is in alarm mode;

the device has one common light detector at the facility, therefore, when the device goes from security mode to alarm mode, it is impossible to determine from an external light signaling device which signal circuit is broken and caused the device to activate and which part of the security department should block;

the device is not provided with backup power when operating in autonomous mode, i.e. when operating without a centralized monitoring console;

The device does not have individual indicator lights on the status of each signal circuit, operating when the mains is turned off.

The purpose of the invention is to expand the functionality of the device, resulting in increased reliability of the protection of the object.

The proposed goal is achieved by introducing a control unit into the device, integrators, comparison units, accumulation elements inserted on capacitors introduced into signal circuits, the first and second outputs of the control unit are connected to the inputs of the signal circuits, the third and fourth outputs are connected to the first inputs of the comparison units, first exits

which through the interlocking elements are connected respectively to the first and second inputs of the control unit, to which the outputs of the first and second signal circuits, which are directly connected to the second inputs of the comparison units and the nepBEJM inputs of the controlled keys, are connected via the corresponding interlock elements, the third input of the control unit is connected to the generator , the second outputs of the comparison units are connected to the second inputs of the controlled keys, and the third outputs to the inputs of the integrators, the outputs of which are connected to the inputs of the Formation block alarm signals, the first and second, third and fourth outputs of which are connected to the corresponding inputs of the blocking node, the fifth and sixth outputs of the alarm generation unit are connected to the first and second inputs of the alarm activation unit. And the fifth and sixth inputs of the blocking node, the seventh input of which connected to the positive power bus, which through the switch is connected to the third and fourth inputs of the alarm activation unit, the third inputs of controlled keys, the fourth input of the control unit, the third in odes comparing blocks, the second input of the integrator, the third and fourth inputs of the alarm unit forming third blocking unit output is connected to one input of the alarm unit, the other inputs of which are connected to respective outputs of block signaling incorporation.

The drawing shows a block diagram of the proposed device. The device contains a generator 1, a control unit 2, accumulation elements 3 and 4 on the capacitors of the signal circuits 5 and b, controllable switches 7 and 8, blocks 9 and 10 of comparison, integrators 11 and 12, elements 13–16 of blocking, node 17 of blocking, the alarm generation unit 18, the alarm activation unit 19, the switch 20, the power supply unit 21, the alarm unit 22, sensors 23 and 24, the warning alarms 25-28 of the alarm unit 22 are connected to the alarm activation unit 19, the audible alarm 29 is connected to the blocking block 17 .

Triggers 30 and 31, memory block 32, call time relay 33, unit 34 includes an executive element 34, a light signaling switching on unit 35, an executive element 36 and a light signaling switching on unit 37, a multivibrator 38 and a blocking element 39, an installation generator 40 pulses, power control unit 41.

The device works as follows.

When the power is turned on, the device from the generator 1 is supplied with periodic oscillations (square wave) to the input of the control unit 2. The first and second outputs of the control unit 2 alternately received voltage pulses at the inputs of the signal circuits 5 and 6. In the first cycle of operation of the generator 1, the signal circuit is prepared and the subsequent analysis of its state by an individual control channel. Representing that in the first cycle of the generator 1, the signal circuit 5 is monitored, in this case the voltage from the first output of the control unit 2 is fed to the input of the signal circuit 5, passes through the contact fire alarm sensor 23, accumulation element 3, the blocking element 13 enters the first input of the control unit 2. The storage cell 3 is charged prior to the voltage of the power source 20.

In the second cycle of operation of the generator 1, the input of the signal circuit 5 is connected by the control unit 2 to the minus of the power supply unit 21, while the voltage accumulated on the storage element 3 of negative polarity is applied at the second input of the unit 9, the storage element 3 begins to recharge through the resistance - the block circuit's power circuit 9. At the same time, a voltage pulse of a calibrated duration is supplied to the first input of the block 9 from the third output of the control unit 2, but during the operation of this pulse the storage element 3 s If the signal circuit 5 does not have time to discharge below the set measuring threshold, then in block 9 a control signal is produced, which is fed to the second input of the control key 0 and 7 and turns it on.

Accumulative element 3, connected through the shoulder of the signal circuit 5 to the first input of the controlled key, begins to recharge with an increased 45 current to the supply voltage.

During the operating time of the control key 7, the third output of the block 9 is fed a signal of the norm 50 to the integrator 11. Then the block 9 turns off the block 2 by disconnecting the electrical circuit connecting the first output of the block 9 via the blocking element 15 to the second input of the block 2

If the signal circuit 5 has increased beyond the normative series resistance (break) or low leakage resistance (QW), then in the first cycle of the generator 60 1, the remote accumulation element 3 is not fully charged or does not charge at all. In this case, in the second cycle of the generator 1, when analyzing the accumulated 65

Charge accumulative element 3 is discharged to the value of the measuring threshold of block 9 during the time of action of a voltage pulse of calibrated duration supplied from block 2. Block 9 is blocked and does not issue a control signal to the adjustable key 7 and integrator 11, which is for subsequent control channel blocks, a sign of a signal circuit violation.

The second signal circuit b is controlled by block 2 with a shift of one cycle of operation of generator 1. The health of signal circuit 6 is monitored similarly by block 10, controlled key 8 and integrator 12.

When the signal circuit 5 and 5 are intact, blocks 9 and 10 are given periodic signals. I norm. to the inputs of the integrators 11 and 13, the integrators form logical units and feed them to the inputs of the flip-flops 30 and 31 of the block 18. The flip-flops 30 and 31 are set to the state corresponding to the standby mode of the device, while the flip-flops 30 and 31 receive control signals to the block 32 of the memory block 18, the executive 38 and the light signaling switching on node 35, the actuator 34 of the blocking block 13 from the trigger 30 to the element 34, the actuator and the light signaling switching on node 37 on the alarm unit 36 from the trigger 31.

Under the action of the joint control signal received from the outputs of the flip-flops 30 and 31, the memory block 32 is activated and outputs a brake signal for the multivibrator 38 and simultaneously removes the blocking signal from the blocking element 39 of the blocking block 17, the ring blocking circuit is disconnected in the initial state at the expense of control signals, supplied by 1x from the flip-flops 30 and 31, the same signals include the nodes 35 and 37 of the light alarm and the elements 34 and 36 are actuators. The device goes into standby mode, in which the element 34 and 36 actuators generate normal signals and transmit them through switch 20 via communication lines 1 and 2 to centralized monitoring consoles, and nodes 35 and 37 turn on the light signaling to turn on the warning lights 25 - 28 in continuous combustion mode. The buzzer 29 is turned off.

In case of violation, suppose that the signal цеп chain 5, the periodic pulses at the third output of block 9 disappear and are fed to the input of the integrator 11.

Then, the device processes occur in the following sequence. The integrator 11 generates a logical zero by which the trigger 30 is switched. At the outputs of the trigger 30, the control signals disappear, as a result of which the actuator 34 is turned off — the first signal is transmitted via an alarm signal, the bell time relay 33 is activated, the preset time is given, the audible alarm 29 is turned off, node 35 switching on the light signaling; the memory unit 32 removes the deceleration signal from the multivibrator 38; the relaxation signal from the multivibrator 38 periodically turns on the alarm activation node 35 - light signals jams 25 and 26 flash. The device works in alarm mode.

Element 34 generates two kinds of information signal for transmitting to the console a central surveillance security and fire. The type of signal that corresponds to the sensors included in the signal circuit — guard or fireman — is used.

When the signal circuit 5 is restored, the trigger 30 does not return to the previous state, but is held in the position corresponding to the alarm mode.

Similar to the above, the control channel of the signal circuit 6 works:

One control channel of the signal circuit, or both, can be turned off by the switch 20. For example, the switch 20 of the signal circuit 5 is performed by removing the supply voltage from the circuit part of block 2, the control key 7, from block 9, from the control element 34 , from the node 35 of turning on the light signaling and supplying the fixing potential to the integrator 11. At the same time, an alarm signal is transmitted over the communication line 1 and the warning lights 25 and 26 are executed. The trigger 30 of this control channel remains in the state corresponding Sim operation. The rest of the device is in working condition and monitors the signal circuit 6.

Switching on by the switch 20 of any control channel of the signal circuit is accompanied by the supply of a supply voltage pulse to the generator 40 of the setting pulses, which sets the memory block 32 and the triggers 30 and 31 to their initial state. If the signal circuit of the switched on channel turns out to be faulty, the memory block 32 supplies the blocking signal to the call blocking element 39 of the time relay 33 does not turn on and the buzzer 29 does not

works. Assuming that the signal circuit 5 is faulty, then the trigger 30 does not provide a control signal to the actuator element 34 and the light-signaling switching node 35. Element 34 issues an alarm on the link 1. The multivibrator 38, not having the braking signal input from the memory block 32, periodically turns on the light switch-on unit 36.

Alarms - warning lights 25 and 26 flash.

The resetting of the device is done by turning off and then turning on the power supply voltage.

When the device is powered by a backup power source, the state of the signal circuits is monitored similarly to that considered, but the lights do not work.

signaling devices 26 and 28 and a sound signaling device 29, powered by an AC network.

In the device, the voltage value of the power supply unit 21 is analyzed by the power control unit 41. In the event of a decrease in the supply voltage below the permissible level, the power supply control unit 41 turns off the elements 34 and 36 of the actuators, the light signaling switch-on units 36 and 37, and triggers the memory unit 32, which removes the braking signal from the multivibrator 38. The device issues alarms on the first and second lines of communication 1, 2, turns on the flashing light detectors 25 and 27, when powered from a backup power source, or the light warning lights 25 28, when powered by AC power. Buzzer 29 not. included.

With the restoration of the set value of the supply voltage on unit 21, the device switches to the initial operation mode.

The proposed device according to its technical data has the following advantages compared with well-known devices of this type.

It allows to conduct round-the-clock independent monitoring of each signal chain with the formation of an individual alarm signal and its transmission separately to one central monitoring station or to two independent stations. This property of the device makes it possible to simultaneously transmit status signals.

each signal circuit to the central monitoring station and maintain a centralized and autonomous control of a valid signal circuit regardless of the state of the other

signal chain.

The device allows you to control signal circuits mounted on protected objects with high humidity, or with elevated levels of network interference.

The device has an increased reliability of monitoring signal circuits with electrocontact sensors due to the supply of high impulse voltages and currents to signal circuits, which makes it possible to provide a breakdown of oxide films of electrical contacts with high ohmic resistance and establish a minimum transient resistance of electrocontact sensors.

The device provides automatic control of the value of the power supply voltage and the output of alarms by the light signaling devices when it is raised below the permissible level. This PROPERTY excludes the transition of the device to an operation mode in which all its functionality is not provided.

Claims (2)

1. The patent of France 2046591, cl. G 08 B 13 / 00.05.04.70. 2. The author's certificate of the USSR 1 563684, cl. G 08 at 13/00, 25D274 (prototype).