SU1751795A1 - Device for alarm signalling - Google Patents

Abstract

This invention relates to a burglar alarm technique and is intended to protect various objects from unauthorized intrusion. The device contains serially connected major block 1, single vibrator 2, amplifier 3 and signal block 4 Detection sensors 5, 6 and 7 are connected to the inputs of the OR 8 element and the S input of the RS 9 flip-flops 9, 10 and 11 For example, a sensor 5 is triggered at the output of which a pulse appears, which is supplied to a controlled timer 12. A logical unit is removed from the R-inputs of the flip-flops and the signal from the detection sensor 5 is activated by the trigger 9. At the same time, the pulses from the generator 13 begin to flow to counter 16 pulses. If during the control time a signal appears at the output of the detection sensor 6 or 7, then at the output of the majority block 1 there will be a signal leading to the triggering of the signal block. 1 hp f-ly, 1 ill.

Description

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The invention relates to a burglar alarm technique and can be used to protect various objects from unauthorized intrusion.

A device for a burglar alarm is known, comprising two peers of Doppler sensors and an infrared sensor.

The disadvantage of this device is its complexity and the need to locate the Doppler sensors orthogonally or at a certain angle to each other, which makes it difficult to use this device when creating mobile rapidly deployable security systems.

It is also known a security alarm device comprising an ultrasonic (US) sensor that generates the first and second motion signals in the zone. The first and second signals correspond to opposite directions of motion. The microwave sensor generates a third motion signal when signals are received on the monitored zone. a logical unit and connected to ultrasonic and microwave sensors, it reacts to the first, second and third movement signals and when the third signal coincides with the second An alarm is generated first or first.

The disadvantage of this device is that in order to fix the unauthorized intrusion of the intruder, it is necessary that he was simultaneously within the sensitivity zones of the ultrasonic and microwave sensors. This allows the device to be used only on areas of a certain relief and does not allow when a single sensor fails, the system is inoperable

The closest in technical essence to the present invention is a device containing three detection sensors, the outputs of which are connected to the OR element directly and via one-oscillators to the inputs of the majority unit. The output of the latter through a series-connected one-oscillator and amplifier are connected to a signaling device that generates an alarm signal.

In this device, when one of the sensors fails, the operability is maintained, since the algorithm implements two of three

In addition, the use of single-oscillators in this device makes it possible to realize the memory of the operation of one of the sensors for a considerable time (up to 4 minutes).

This makes it possible to use sensors whose sensitivity zones do not intersect, those sensors can be installed on the ground arbitrarily.

The disadvantage of this device is low functional reliability, since when an alarm occurs or during a monitoring session, the device loses sensitivity for a very long time (about 4 minutes), which degrades its tactical characteristics.

The purpose of the invention is to increase the functional reliability

5 The goal is achieved by the fact that in the device containing three detection sensors, the outputs of which are connected to the inputs of the OR element, the majority unit, the output of which is connected to the input of the one-channel oscillator, the output of which is connected to the input of the amplifier, the output of which is connected to the indicator's input, pulses, the RS trigger trigger and a controlled timer whose output is connected to the input

5 sets to zero the RS-flip-flops, the outputs of which are connected to the corresponding inputs of the majority unit, the outputs of the one-shot, pulse generator and the OR element are connected respectively to the setup input to the synchronization input and the start timer of the controlled timer, the outputs of the detection sensors are connected to the installation inputs in the unit state RS-flip-flops

5 In addition, the controlled timer contains an OR element, an RS flip-flop, a pulse counter, and a decoder, the output of which is connected to the first input of the OR element, the second input of which is the setting input of the timer and the zero-setting state RS trigger. , the output of the OR element is connected to the installation input to the unit state of the RS flip-flop, the output of which

5 is connected to the setup input of a pulse counter and is a timer output, the counter input of a pulse counter is a timer synchronization input, the outputs of a pulse counter are connected to the corresponding inputs of the decoder.

The drawing shows a block diagram of the device.

The device contains the majority unit 1, the output of which is connected to the input

5 one-shot 2, performed, for example, on the D-trigger and RC-circuit. The output of the one-shot 2 is connected to the input of the amplifier 3, the output of which is connected to the input of the signaling device 4, made, for example, in the form of a relay. Detection sensors 5, 6 and 7 are connected to

the inputs of the element OR 8 and the installation inputs to the single state of the RS flip-flops 9. 10 and 11, the outputs of which are connected to the inputs of the majority block 1. The output of the element OR 8 is connected to the start input of the controlled timer 12, the setup input and the synchronization input of the latter are connected to the outputs of the one-shot 2 and the generator 13 pulses, respectively.

Controlled timer 12 contains an OR 14 element connected to the input of setting RS-flip-flop 15 to one state. The output of the latter is connected to the input of a controlled timer and the setting input of pulse counter 16, executed, for example, on a 564IE10 chip. The inputs of the decoder 17, made, for example, on the chip 564ID1, are connected to the corresponding outputs of the counter 16 pulses, and the output - to the first input of the OR 14 element, the second input of which is the control input of the controlled timer 12. the trigger 15 and the counting input of the pulse counter 16 are, respectively, the start and synchronization inputs of the controlled timer 12. The output of the latter is connected to the inputs of setting the RS-flip-flops 9, 10 and 11 to the zero state.

The device works as follows

In the initial state, the output of the RS-trigger 15 is the potential of a logical unit that sets the RS-triggers 9, 10 and 11 and the counter 16 pulses to the zero state and disables the operation of the counter.

At the output of the majority block 1 - zero potential. The one-vibration 2 is turned off and the output of the amplifier 3 is also zero potential.

Suppose that in case of violation of the protected zone, the detection sensor 5 is triggered. At its output, a pulse appears which, via the OR 8 element, sets the RS-flip-flop 15 of the controlled timer 12 to the zero state. A logical unit is removed from the inputs of the RS-flip-flop 9, 10, and 11 to the zero state and the sensor 5 detection is set to one state RS-flip-flop 9. At the same time, the pulses from the generator 13 begin to arrive at the counter 16 pulses. If, prior to the operation of the decoder 17 for wils, the signal at the output of any of the detection sensors 6, 7, then at the output of the majority block 1 a potential of a logical unit appears, for a short time the one-shot 2, the signal from the output of which through the amplifier 3 turns on the alarm 4, producing alert.

At the same time, the pulse of the one-shot 2 through the element OR 14 turns on the RS-flip-flop 15 so that the pulse counter 16 and the RS-flip-flops 9, 10 and 11 are set to the zero state.

Thus, when any pair of detection sensors is triggered, regardless of the alarm mode or control

0, simultaneously with the alarm, the device immediately returns to its original state.

If, during the memory time determined by the controlled timer 12, after the operation of one of the sensors, none of the two remaining ones failed, then when the counter 16 pulses reached a certain threshold corresponding to the memory time, the decoder 17 works, which

0, the OR element 14 triggers the RS flip-flop 15 and the device returns to its original state without generating an alarm.

Therefore, the introduction to the device

Claims (2)

5 of a pulse generator, a controlled timer and three RS-flip-flops significantly reduce the device dead time after an alarm is generated in both the detection mode and the health monitoring mode, which increases its functional reliability. Claim 1. A security alarm device comprising three detection sensors, 5 outputs of which are connected to the inputs of the OR element, the majority unit, the output of which is connected to the input of a single vibrator, the output of which is connected to the input of amplification, l, the output of which is connected to the input of the analyzer, in order to improve the functional reliability of the device pulse generator, three RS-triggers and a controlled timer, the output of which is connected to the inputs 5 set to zero state RS-flip-flops, the outputs of which are connected to the corresponding echoes of the majority block, the outputs of the one-shot, pulse generator and the element OR are connected respectively to the installation input, to the synchronization input and the start input of the timer being set, the outputs of the detection sensors are connected to the inputs setting in one state RS-flip-flops. five 2. The device according to claim 1, that is, so that the controlled timer contains an OR element, an RS flip-flop, a pulse counter and a decoder, the output of which is connected to the first input of the OR element, the second input which is the timer setup input, the zero setting input the RS flip-flop is input starts the timer output, the counting input the timer ska, the output of the element OR the pulse counter connector is the input of the sync input of the installation in the one state of ionization of the timer, the outputs of the counter of the RS trigger, the output of which is connected to the pulses are connected to the corresponding the installation input of the pulse counter and 5 inputs of the decoder.