RU2572689C1 - Security alarm - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: security alarm comprises four sensitive elements in the form of cable sections and a signal processing unit for processing signals from the sensitive elements, each being a cable section with a length of up to 250 m which ends with an end sleeve, in which there is a 4.7 megaohm resistor, which is connected in an electrical circuit between centre conductors and the cable sheath. The processing unit comprises two low frequency value amplification modules, two high frequency value amplification modules, two bias supply modules for the amplifiers, a supply conversion module and a decision module. The alarm is also provided with a power supply and communication unit, having a battery, a radio modem, a charge controller and a solar module. The output of the sensitive element is connected to a low frequency value amplification module or a high frequency value amplification module, the outputs of which are connected to the decision module, which is bidirectionally connected to the radio modem. Inputs of the bias supply modules for the amplifiers are connected to the supply conversion module, and the outputs thereof are connected to the low frequency value amplification modules and the high frequency value amplification modules.

EFFECT: low power consumption and longer operational life of the alarm.

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Description

FIELD OF THE INVENTION

The invention relates to technical means of burglar alarms and can be used in security systems of the perimeter and territories. The security detector STS-110 is designed to create an alarm blocking of the security line on a mesh metal fence.

State of the art

A device for vibrometric detection of an intruder is known (RF patent for the invention No. 2263968, class IPC G08B13 / 02, publ. 10.11.2005), one of the variants of which contains a first vibration-sensitive element connected to the input of the first measuring transducer, the first executive signaling device, the first a useful signal analyzer containing a pulse counter, a first one-shot, and also connected in series with a first band-pass filter, a first envelope detector and a first comparator, and a per a control unit whose control group outputs are connected to the group of control inputs of the pulse counter and to the group of control inputs of the first one-shot and are a group of control inputs of the first analyzer of the useful signal, the first, second and third elements AND, the OR element, the second are introduced into the first analyzer of the useful signal one-shot, serially connected second band-pass filter, second envelope detector, second comparator, serially connected third band-pass filter, third envelope detector, three the second comparator, the output of which is connected to the first inputs of the first and second AND elements, the outputs of which are connected respectively to the first and second inputs of the OR element, and the inputs - to the outputs of the first and second comparators, the inputs of the second and third band-pass filters are combined and connected to the input the first bandpass filter, the output of the OR element is connected to the inputs of the pulse counter and the first one-shot, the outputs of which are connected respectively to the first and second inputs of the third element And, the output of which is connected to the input the second monoflop, whose output is connected to the input of the first actuator device and a signaling output of the first desired signal analyzer.

A disadvantage of the known device for vibrometric detection of an intruder is the relatively high power consumption of the device due to the presence of a large number of elements of the device.

A combined detection means is known (Utility Model Patent No. 65270, class IPC G08B13 / 00, published July 27, 2007), including, but not limited to, vibration detection means, which consists of a processing unit, a metal mesh fence and a cable sensing element. The processing unit includes a charge-sensitive amplifier, filters, a processor, and an actuator based on a solid-state relay. The sensitive element consists of two triboelectric cables. The processing unit to the sensing element is connected via a connecting cable to the peripheral controller using a communication cable.

A disadvantage of the known vibration detection means is the high power consumption of the blocks and elements of the device due to the presence of cable power networks, as well as the impossibility of autonomous operation.

The closest in technical essence and the achieved result is a perimeter security device (certificate for utility model No. 37857, class IPC G08B13 / 24, G08B13 / 26, publ. 05/10/2004) containing sensitive sensors in the form of a cable, signal processing unit coming from sensitive sensors and a signal output unit, the sensitive sensors being presented in the form of four or more segments of different lengths, for example, a coaxial triboelectric cable.

A disadvantage of the known device is the impossibility of its autonomous operation, significant power consumption, as well as the need to lay power wires, which significantly increases the cost of implementing a security alarm.

Disclosure of invention

The objective of the present invention is the creation of an autonomous integrated security alarm system with low energy consumption, a long service life, which does not require the installation of power and communication wires, as well as registration at the Main Radio Frequency Center (RFRC).

The technical result is a reduction in power consumption of the security detector and an increase in the resource of its work.

The indicated technical result is that the security detector contains four sensitive elements in the form of cable segments and a signal processing unit from the sensitive elements, according to the invention, the sensitive element is a cable segment up to 250 m long, ending with a terminal sleeve in which a 4.7 resistor is located MΩ, included in the electrical circuit between the central cores and the cable screen; moreover, the processing unit contains two modules for amplifying low-frequency values, two modules for amplifying high-frequency values, two bias power modules for amplifiers, a power conversion module, and a decision module; the device is additionally equipped with a power and communication unit containing a battery, a radio modem, a charging controller and a solar module; moreover, the output of the sensor element is connected to a low-frequency amplification module or a high-frequency value amplification module, the outputs of which are connected to a decision module connected in a bi-directional manner to a radio modem; the inputs of the bias power modules for the amplifiers are connected to the power conversion module, and their outputs are connected to the low frequency amplification modules and the high frequency amplification modules; the input of the power conversion module is connected to the charging controller, and its output is connected to the decision module; the input of the charging controller is connected to the battery and the solar module, and its output is connected to the radio modem.

Brief Description of the Drawings

In FIG. 1 shows a block diagram of a security detector STS-110.

In FIG. 2 shows a general view of the processing unit, the power supply and communication of the security detector STS-110.

In FIG. Figure 3 shows a block diagram of the connection of STS-110 detectors to a security system server.

The following notation is used in the drawings: triboelectric sensitive element - 1, processing unit - 2, low frequency amplification module - 2.1, high frequency amplification module - 2.2, bias power module for amplifiers - 2.3, power conversion module - 2.4, decision module - 2.5, power and communication unit - 3, battery - 3.1, radio modem STS-920 - 3.2, charging controller - 3.3, solar module - 3.4, security detector STS-110 - 4, block of modified channel sensors (RDM unit) - 5, information collection and processing systems - 6.

The implementation of the invention

The security detector STS-110 contains triboelectric sensitive elements 1 connected to a processing unit 2, which is further connected to a power and communication unit 3.

The sensitive element 1 is a piece of cable (up to 250 m long) that converts the mechanical vibrations of the mesh fence into electrical signals based on the contact electrification effect (triboelectric effect). Each sensing element 1 is an extended cylindrical capacitor, between two plates of which there is an electric charge when it vibrates or deforms. The role of one lining is performed by the parallel connected inner conductors of the cable, and the second lining of the capacitor is the aluminum foil of the cable screen. Each sensing element 1 ends with a terminal coupling, in which a 4.7 MΩ resistor is located, included in the electric circuit between the central conductors and the cable screen, which allows using the detection unit to control both an open circuit and a short circuit of the working circuit of the sensing element 1 along the entire length . The sensing elements 1 are installed on the fence with the help of fasteners, which should provide a rigid fixation of the sensitive elements 1 on the fence system.

The detector processing unit 2 contains two low-frequency value amplifier modules 2.1, two high-frequency value amplification modules 2.2, two bias power supply modules 2.3, a power conversion module 2.4, and a decision module 2.5.

The bias power module 2.3 for amplifiers is a bias voltage stabilizer.

Power conversion module 2.4 is a voltage regulator.

Decision module 2.5 is an STS-4910 controller.

Processing unit 2 is designed to process electrical signals from four sensing elements 1 at once, which allows you to get rid of crosstalk simultaneously affecting the cables. Block 2 is mounted on a mesh fence.

The processing unit 2 performs an automatic health check with a predetermined period. A working detector should periodically generate a remote control signal. This ensures that the health check of both the processing unit 2 and the sensitive elements 1. The information content of the processing unit 2 is five:

- alarm, left flank;

- alarm, right flank;

- malfunction, left flank;

- malfunction, right flank;

- a periodic signal of automatic remote control.

The informativeness of the detector by alarm loop is four:

- anxiety;

- malfunction;

- the norm;

- operability (signal to perform automatic remote control).

The input circuits of the detector processing unit 2 and the electrical communication circuits with the equipment of the information collection and processing system 6 are protected from the effects of high voltage pulses arising in the form of pickups during lightning discharges.

The power and communication unit 3 contains a battery 3.1, a radio modem STS-920 3.2, a charge controller 3.3 and a solar module 3.4. Block 3 is designed to power the block 2 detection and communication with systems 6 for collecting and processing information. Block 3 is recommended to be placed in a vertical position with an orientation to the south.

The output of the sensor 1 is connected to a low-frequency value amplification module 2.1 or a high-frequency value amplification module 2.2, the outputs of which are connected to a decision-making module 2.5, connected bidirectionally to a radio modem 3.2; the inputs of the bias power modules 2.3 for the amplifiers are connected to the power conversion module 2.4, and their outputs are connected to the low frequency amplification modules 2.1 and the high frequency amplification modules 2.2; the input of the power conversion module 2.4 is connected to the charging controller 3.3, and its output is connected to the decision making module 2.5; the input of the charging controller 3.3 is connected to the battery 3.1 and the solar module 3.4, and its output is connected to the radio 3.2.

The security detector STS-110 operates as follows.

The processing unit 2 carries out continuous monitoring of the health of the sensing elements 1. In the event of an open or short circuit in any of the cables of the sensing elements 1, the detector generates a fault signal.

When the intruder overcomes the barrage system by climbing or having a snack, the sensing element 1 generates electrical signals that enter the processing unit 2, where the signals are processed according to an adaptive processing algorithm and a response signal is generated. Adaptive processing algorithm allows you to dynamically change the threshold when changing the interference environment.

To receive the alarm signals of the detector 4, the RDM unit 5 is intended (see Fig. 3). Up to 63 detectors can simultaneously be in the reception area of the RDM unit 5. Block 5 of the RDM via communication channels (Ethernet) transmits the response signals of the detectors to systems 6 for collecting and processing information for their registration and decision-making.

Operational restrictions

The mesh fence in each area protected by the detector must have a constant longitudinal tension.

When fastening the sensing element 1 to the gate or gate, it must have a vertical displacement relative to its position on the fence, i.e. the cable should work on twisting, not bending.

Due to the above design features, the STS-110 security detector has very low power consumption of all units (processing unit - 1.4 μA, standby radio modem - 800 μA, charger - 1 μA), provides full autonomy in power supply with the ability to work up to 3 months without sunshine. The proposed technical solution also does not require laying power wires, which is an economically very expensive operation.

Another advantage is the use of a radio channel, which also allows you to abandon the cost-effective laying of communication cables. The choice of the frequency of the radio modem at 433 MHz allows you to avoid registering the device in the receiver.

The security detector can also work in relay mode, which increases the range of radio communication from the receiver to the transmitter through the relay to 100 km.

Thus, the security detector STS-110 provides the conversion of mechanical vibrations (vibrations) of the obstacle that occurs when the intruder overcomes it into electrical signals, processes these signals according to a specific algorithm, generates an output response signal and transfers it to the information collection and processing system.

The security detector STS-110 can serve as an independent border of protection, and can be used as part of complex systems of physical protection of objects together with technical means for detecting other principles of operation.

A comparative analysis of the claimed invention showed that the set of essential features of the declared security detector is not known from the prior art and therefore corresponds to the patentability condition of "novelty."

In the prior art there were no signs that coincided with the distinguishing features of the claimed invention and affecting the achievement of the claimed technical result, therefore, the claimed invention meets the patentability condition "inventive step".

The above information confirms the possibility of using the declared security detector to protect the perimeter and territories, and therefore meets the patentability condition “industrial applicability”.

Claims (1)

A security detector containing four sensing elements in the form of cable segments and a signal processing unit coming from sensitive elements, characterized in that it is equipped with a power and communication unit containing a battery, a radio modem, a charging controller and a solar module, each sensitive element being made in the form of a length of cable up to 250 m, ending with a terminal sleeve, in which a 4.7 MΩ resistor is located, included in the electrical circuit between the central cores and the cable screen, and the signal processing unit The catch contains two low-frequency amplification modules, two high-frequency amplification modules, two bias power modules for amplifiers, a power conversion module, and a decision-making module, the output of the sensor being connected to a low-frequency value amplification module or a high-frequency amplification module, outputs which are connected to a decision module connected bi-directionally to the radio modem, the inputs of the bias power modules for the amplifiers are connected to the power conversion module, and their outputs are They are shared with low-frequency amplification modules and high-frequency amplification modules, the input of the power conversion module is connected to the charging controller, and its output is connected to the decision module, the input of the charging controller is connected to the battery and the solar module, and its output is connected to the radio modem.

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