CN2417273Y

CN2417273Y - Anti-theft detecting device for window or blacony

Info

Publication number: CN2417273Y
Application number: CN 00227799
Authority: CN
Inventors: 陈海峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-10
Filing date: 2000-04-10
Publication date: 2001-01-31
Anticipated expiration: 2010-04-10

Abstract

The utility model relates to an anti-theft detecting device, which is composed of a power circuit, a single-chip microcomputer circuit, an ultrasonic transmission drive circuit, a reception shaping circuit, and an ultrasonic transmitter-receiver. The utility model can carry out the detection of invasion prevention for windows or verandas of a room through transmitting and receiving ultrasonic. The utility model is not effected by heat air flow, temperature change, and strong light, and the utility model is a stable and reliable anti-theft detecting device for the windows or the verandas.

Description

The antitheft sniffer of window balcony

The utility model belongs to the electronic anti-theft sniffer, specifically a kind ofly is used to survey the window that whether has object to invade the room or the electronic anti-theft sniffer of balcony.

At present, the electronic anti-theft sniffer that is used for window or balcony generally all adopts the probe that is made of Fresnel Lenses and pyroelectric infrared sensor etc., carry out intrusion detection by the infrared rays that detects mobile human body radiation, this kind sniffer technology is ripe, use more extensive, but can blow etc. former thereby report by mistake because of variation of ambient temperature or hot blast in actual use, thereby influence the reliability of whole guard against theft and alarm system.

The purpose of this utility model is the deficiency at above-mentioned anti-theft device, and a kind of reliable and stable antitheft sniffer that is used for the window balcony that can not report by mistake is provided.

The antitheft sniffer of window balcony of the present utility model comprises: power circuit, single chip circuit, ultrasonic emitting drive circuit, reception shaping circuit is characterized in that: ultrasonic emitting drive circuit and reception shaping circuit are connected to the ultrasonic transmitter-receiver that integrates ultrasonic emitting function and receiving function.

The antitheft sniffer course of work of window balcony of the present utility model is: the utility model is placed on window or the balcony, ultrasonic transmitter-receiver is faced toward the zone that needs strick precaution, after the power circuit energising, single chip circuit produces the supersonic frequency signal of telecommunication and sends the ultrasonic emitting drive circuit to, the ultrasonic emitting drive circuit makes the ultrasonic transmitter-receiver that is connected on this circuit that the signal of telecommunication is converted to ultrasonic wave and launches, ultrasonic wave runs into object blocks and can reflect, the echo of reflection is received and is converted to the signal of telecommunication by ultrasonic transmitter-receiver, be sent to the reception shaping circuit, this circuit amplifies the signal of telecommunication and shaping sends the single chip circuit processing again to, single chip circuit is by calculating from the emission ultrasonic wave to the time of receiving echo, again according to ultrasonic wave transmitting speed aloft, thereby draw the distance between obstacle and the ultrasonic transmitter-receiver, if this distance is less than the value of setting in single-chip microcomputer in advance, single chip circuit is with regard to output alarm signal.

The technology that the utility model has adopted emission reception ultrasonic wave to find range is prevented intrusion detection to the window or the balcony in room, heated airflow is not disturbed, be not subjected to the influence of variation of ambient temperature, not disturbed by high light, can detect accurately and reliably from the effractor of balcony or window invasion, solved effectively that probe in the past is subject to disturb and the problem reporting by mistake or refuse to submit is a kind of comparatively practical antitheft sniffer of window balcony.

Concrete structure of the present utility model is provided in detail by the following drawings and embodiment.

Fig. 1 is the circuit diagram of utility model.

Embodiment: as shown in Figure 1, power circuit is made of integrated regulator IC1, and the model of IC1 is LM7805.Single chip circuit is made of single-chip microcomputer IC2 and quartz crystal XTl etc., and the model of single-chip microcomputer IC2 is PIC16C54A, and the operating frequency of quartz crystal XT1 is 4MHZ.The ultrasonic emitting drive circuit comprises: transformer B1 and middle pliotron T1.The reception shaping circuit comprises: diode D1, triode T2, coupling capacitance C1, resistance R 1, computing amplification circuit IC3 (model of IC3 is NE5532), capacitor C 2, diode D2, diode D3 and triode T3.U1 is a ultrasonic transmitter-receiver, and ultrasonic transmitter-receiver U1 integrates ultrasonic emitting function and receiving function, and ultrasonic transmitter-receiver U1 is connected with ultrasonic emitting drive circuit and reception shaping circuit.The course of work of the present utility model is: ultrasonic transmitter-receiver U1 is needed the zone of taking precautions against outward facing to window or balcony, connection+9V power supply, integrated regulator IC1 begins to be each circuit part power supply, single-chip microcomputer IC2 the 10th pin output duty cycle is 1: 100 a supersonic frequency electric pulse, amplify through triode T1, drive by transformer B1 that ultrasonic transmitter-receiver U1 converts electrical energy into ultrasonic wave again and to aerial emission, if being taken precautions against in the zone has human body, ultrasonic wave can reflect, the echo of reflection is received and is converted to the signal of telecommunication by ultrasonic transmitter-receiver U1, do preposition amplification through triode T2, again through capacitor C 1, resistance R 1 sends computing amplification circuit IC3 to do that band is logical and amplify after, give diode D2 through capacitor C 3 couplings again, diode D3 and triode T3 give shaping, send single-chip microcomputer IC2 the 9th pin at last to, after single-chip microcomputer IC2 receives this echo-signal, the clock that provides according to crystal XT1, calculate ultrasonic wave from being emitted to the time of receiving echo, calculate the object of reflection supersonic wave and the distance between the ultrasonic transmitter-receiver U1 according to transmitting speed in the ultrasonic air again, if this distance is less than the distance values of setting in single-chip microcomputer IC2, single-chip microcomputer IC2 will be by its 8th pin output alarm signal.The specifications and models of the element of mark all can data or the typical unit circuit data of used IC obtain by consulting wherein among Fig. 1.

Claims

1. electronic anti-theft sniffer, comprise: power circuit, single chip circuit, ultrasonic emitting drive circuit, reception shaping circuit is characterized in that: have the ultrasonic transmitter-receiver that integrates ultrasonic emitting function and receiving function to be connected with ultrasonic emitting drive circuit and reception shaping circuit.