CN102184612A

CN102184612A - Microwave induction theft-proof control device

Info

Publication number: CN102184612A
Application number: CN 201110082782
Authority: CN
Inventors: 黄勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-01
Filing date: 2011-04-01
Publication date: 2011-09-14

Abstract

The invention belongs to the technical field of electronic and security and protection control and relates to a microwave induction theft-proof control device. The device consists of a direct current (DC) power supply, a power supply filtering circuit, a microwave detection module Integrated Circuit 1 (IC1), an oscillating coil L, an antenna (AT), a signal recognition and amplification circuit, a level power amplifier and a direct current relay J. The microwave induction theft-proof control device is characterized in that: a TWH9428 integrated circuit is adopted for the microwave detection module IC1; and the model of an Integrated Circuit 2 (IC2) in the signal recognition and amplification circuit is TWH9429. A monitoring device for actively detecting the entrance of a human body into a defense region through microwave induction has the advantages that: the device is not limited by the size of a monitored region; the phenomena of misreporting of unsubstantial dangerous cases, under-reporting of dangerous warning conditions and the like can be avoided; disturbance caused by the entrance of small animals such as cats, dogs and the like can be eliminated; the device has the characteristics of large defense area, adjustable detection distance, reliable detection performance and the like; and a detection device can be connected with a sound and light alarm device as required.

Description

Microwave induced formula anti-theft control device

Technical field

The invention belongs to electronics and safety monitoring technical field, is about a kind of microwave induced formula anti-theft control device.

Background technology

Monitoring alarm device kind on the market is a lot, and the mode of obtaining alert mainly contains: the one, and what leading position was occupied in market is the alarm that probe (adding Fresnel Lenses with the pyroelectric effect device) is made with the infrared sensor; The 2nd, be the alarm with against shock, tamper evident, the manufacturing of noiseproof vibration displacement sensor of representative with vehicle-mounted; The 3rd, a small amount of alarm of using touch, the manufacturing of microwave induced probe etc.

Infrared supervising device or facility exist some problems or defective in actual use really on the market, as: when environment temperature was higher, installing and using people's body heat summer out of doors, to release the Infrared intrusion detector effect bad, and serviceability is reliable inadequately.Be familiar with the stealer of infrared probe principle of work and can manage to utilize the detection dead angle, close or destroy alarm from the side or the back of infrared probe, thereby enter infrared strick precaution zone.The object of infrared probe to not moving can not in time be reacted or be slow in reacting the object of rubescent outer heat not, and the invador can utilize the search coverage of club or instrument change infrared probe.The product that has is strayed into the defence area alarm phenomenon of also may transmitting messages when toy, and this unreliability often causes unnecessary trouble to the monitor staff.

All kinds of warning devices also can be divided into by Starting mode: active probe and passive detection.Microwave induced formula anti-theft control device of the present invention is exactly a kind of sniffer with the active probe mode, for the part shortcoming that solves or remedy some supervising device existence on the market designs.

Below describe this microwave induced formula anti-theft control device in detail and make related relevant technologies content.

Summary of the invention

Goal of the invention and beneficial effect: the present invention with microwave induced active probe set up defences the zone whether have human body to enter a kind of monitoring device, it has realized following function:

1. effects limit such as monitored area size or article character not;

2. can solve the wrong report of no substantive dangerous situation and dangerous alert and phenomenon such as fail to report;

3. animal such as undersized cat and dog enters the interference that search coverage causes, and the present invention can turn a blind eye to;

4. the present invention has characteristics such as the area of strick precaution is big, distance of reaction is adjustable, detection performance is reliable;

5. sniffer can be refuted as required and be connect sound or light warning device.

Technical scheme: microwave induced formula anti-theft control device is made up of direct supply DC, electric source filter circuit, microwave sounding module I C1 and oscillator coil L and antenna AT, signal identification and amplifying circuit, level power amplification and DC relay J, it is characterized in that: microwave sounding module I C1 adopts TWH9428 type integrated circuit, and the model of integrated circuit (IC) 2 is TWH9429 in signal identification and the amplifying circuit.

Connection features in the composition of each several part circuit and the circuit between the components and parts

Connection features between microwave sounding module I C1 and oscillator coil L and the antenna AT: the Y pin of microwave sounding module I C1 meets an end and the antenna AT of oscillator coil L, the YO pin of microwave sounding module I C1 connects the other end of oscillator coil L, the VDD pin of microwave sounding module I C1 connects the positive pole of electrochemical capacitor C1, the B pin of microwave sounding module I C1 connects the positive pole of electrochemical capacitor C2, the negative pole connection circuit ground GND of the G pin of microwave sounding module I C1 and electrochemical capacitor C2, the O pin of microwave sounding module I C1 connects the I pin of integrated circuit (IC) 2.

Signal identification and amplifying circuit: the B pin of integrated circuit (IC) 2 connects the positive pole of electrochemical capacitor C2, the I pin of integrated circuit (IC) 2 connects the O pin of microwave sounding module I C1, cross-over connection potentiometer RP between the WO pin of integrated circuit (IC) 2 and the W pin, the VDD pin of integrated circuit (IC) 2 connects the positive pole of electrochemical capacitor C1, the G pin connection circuit ground GND of integrated circuit (IC) 2, the end of the O pin connecting resistance R2 of integrated circuit (IC) 2.

Level power is amplified and DC relay J: the base stage of another termination silicon transistor BG1 of resistance R 2, the collector of silicon transistor BG1 connects an end and the transwitch diode D1 positive pole of DC relay J coil, the other end of DC relay J coil and transwitch diode D1 negative pole meet the anodal VCC of direct supply DC, the emitter connection circuit ground GND of silicon transistor BG1.

Electric source filter circuit: the anodal VCC of a termination direct supply DC of resistance R 1, the positive pole of another termination electrochemical capacitor C1 of resistance R 1, the negative pole connection circuit ground GND of electrochemical capacitor C1.

The circuit working principle: the circuit of microwave induced formula anti-theft alarming control device is made up of microwave sounding module I C1 (inside comprises circuit such as microwave emission, low-pass filtering, gating amplification), oscillator coil L and antenna AT.The oscillatory circuit of microwave sounding module I C1 inside produces the microwave oscillation signal of about 1000MHz, by antenna AT space radiation frequency electromagnetic waves towards periphery.

Signal identification and amplifying circuit are made up of integrated circuit (IC) 2 (inside comprises circuit such as power supply voltage stabilizing, gating amplification, soft start, the driving of relatively amplifying, delay time), capacitor C 1～C2, resistance R 1 and potentiometer RP.When no human body moves in microwave scanning probe zone, the control output end O pin output low level of signal identification and amplification circuit IC2, silicon transistor BG1 is in cut-off state, and DC relay J is in release conditions.

When human body is mobile in the effective range of microwave induced formula anti-theft alarming control device, the magnetic field of its surrounding space will change, antenna AT will detect human body and move the signal feedback that changes of generating an electromagnetic field and carry out low pass to microwave sounding module I C1 and handle, and make the signal output part O pin output low frequency signal of microwave sounding module I C1.Because the undertension that export microwave sounding module I C1 detection back is with the work of promotion terminator, further gating amplifies and delay drives processing so signal must be done through integrated circuit (IC) 2, follows the control output end 0 pin output high level from integrated circuit (IC) 2.For the high level that makes output has enough promotion power, circuit uses 1 silicon transistor BG1 to carry out power amplification, to drive DC relay J adhesive, utilizes the normally opened contact of DC relay J or normally closed contact to refute the warning device that connects needs.

Description of drawings

Accompanying drawing is the embodiment circuit working schematic diagram that the invention provides a microwave induced formula anti-theft control device.

Embodiment

Implement according to the circuit working schematic diagram of microwave induced formula anti-theft control device shown in the accompanying drawing and the components and parts technical requirement of description of drawings and the following stated, can realize the present invention.

The selection of components and parts and technical parameter thereof

IC1 selects TWH9428 type microwave sounding module for use;

Integrated circuit (IC) 2 is signal identification and amplifying circuit, and model is TWH9429;

Silicon transistor BG1 selects models such as 2SC8050,3DG8050,3DG12 for use;

D1 selects 1N4148 type transwitch diode for use;

Resistance uses RTX-1/8W type metalfilmresistor, resistance 220 Ω of resistance R 1, and the resistance 2.2K Ω of resistance R 2, RP selects solid potentiometer for use, and its resistance is 330K Ω;

C1 and C2 all select the withstand voltage 16V aluminum hull electrochemical capacitor that is for use, and capacity is respectively 470 μ F, 47 μ F.

Circuit production and debugging

Oscillator coil L puts down on the wooden stick of φ 5mm with the high strength enamelled wire of φ 0.68mm and makes around 6～7 circles; Antenna AT can use the 60cm telescopic antenna, or is 320mm with bare copper wire, the length of φ 1.5～2mm.

If use the open circles coil antenna of enameled wire coiled φ 120～150mm of φ 2mm, the two ends of its opening part are connected on respectively on the YO pin and Y pin of microwave sounding module I C1, and the open circles loop antenna can directly replace oscillator coil L, can exempt to connect simultaneously antenna AT.

The scope of detection sensor can be regulated by potentiometer RP, makes detection range meet or exceed 10m.

If do not need to control other warning devices, the relay J in the circuit can select for use the 12V piezoelectric buzzer directly to replace.

Claims

1. microwave induced formula anti-theft control device, form by direct supply DC, electric source filter circuit, microwave sounding module I C1 and oscillator coil L and antenna AT, signal identification and amplifying circuit, level power amplification and DC relay J, it is characterized in that: microwave sounding module I C1 adopts TWH9428 type integrated circuit, and the model of integrated circuit (IC) 2 is TWH9429 in signal identification and the amplifying circuit.

2. microwave induced formula anti-theft control device according to claim 1, connection features between microwave sounding module I C1 and oscillator coil L and the antenna AT is: the Y pin of microwave sounding module I C1 meets an end and the antenna AT of oscillator coil L, the YO pin of microwave sounding module I C1 connects the other end of oscillator coil L, the VDD pin of microwave sounding module I C1 connects the positive pole of electrochemical capacitor C1, the B pin of microwave sounding module I C1 connects the positive pole of electrochemical capacitor C2, the negative pole connection circuit ground GND of the G pin of microwave sounding module I C1 and electrochemical capacitor C2, the O pin of microwave sounding module I C1 connects the I pin of integrated circuit (IC) 2.

3. microwave induced formula anti-theft control device according to claim 1, the feature of signal identification and amplifying circuit is: the B pin of integrated circuit (IC) 2 connects the positive pole of electrochemical capacitor C2, the I pin of integrated circuit (IC) 2 connects the O pin of microwave sounding module I C1, cross-over connection potentiometer RP between the WO pin of integrated circuit (IC) 2 and the W pin, the VDD pin of integrated circuit (IC) 2 connects the positive pole of electrochemical capacitor C1, the G pin connection circuit ground GND of integrated circuit (IC) 2, the end of the O pin connecting resistance R2 of integrated circuit (IC) 2.

4. microwave induced formula anti-theft control device according to claim 1, level power is amplified and the feature of DC relay J is: the base stage of another termination silicon transistor BG1 of resistance R 2, the collector of silicon transistor BG1 connects an end and the transwitch diode D1 positive pole of DC relay J coil, the other end of DC relay J coil and transwitch diode D1 negative pole meet the anodal VCC of direct supply DC, the emitter connection circuit ground GND of silicon transistor BG1.

5. microwave induced formula anti-theft control device according to claim 1, the feature of electric source filter circuit is: the anodal VCC of a termination direct supply DC of resistance R 1, the positive pole of another termination electrochemical capacitor C1 of resistance R 1, the negative pole connection circuit ground GND of electrochemical capacitor C1.