Burglar alarm device based on magnetic field sensor
A magnetic field sensor and anti-theft alarm technology, applied in the direction of the size/direction of the magnetic field, can solve the problems of low reliability, high maintenance funds, and high price, and achieve the effects of wide application range, huge development potential, and low cost
Active Publication Date: 2015-01-21
TAIYUAN UNIV OF TECH
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[0013] The present invention provides an anti-theft alarm device based on a magnetic field sensor in order to solve the problems of low reliability, frequent false alarms, bulky size, high price, and high maintenance funds in the existing anti-theft alarm device.
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[0024] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0025] An anti-theft alarm device based on a magnetic field sensor, comprising a first part and a second part, the first part, such as figure 1 As shown, it includes a magnetic field generating device and a detection and alarm device, and the second part includes a detection and alarm device; the detection and alarm device includes a detection unit, a main control unit, an alarm unit and a power supply unit.
[0026] The detection unit includes a magnetic field sensor U2 of the type MAG3110 and its (conventional) peripheral circuits. Such as figure 2 As shown, the first pin of the magnetic field sensor U2 is grounded through the first capacitor C1, the second pin is grounded through the third capacitor C3 and the fourth capacitor C4 connected in parallel, the fourth pin is grounded through the second capacitor C2, and the second pin is grou...
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The invention relates to a burglar alarm device, in particular to a burglar alarm device based on a magnetic field sensor. The problems of being not high in reliability, frequent in misinformation, large in size, high in price, high in maintenance fund and the like existing on an existing burglar alarm device are solved. The burglar alarm device based on the magnetic field sensor comprises a first part and a second part, wherein the first part comprises a magnetic field generating device and a detection alarm device, and the second part comprises a detection alarm device. The detection alarm device comprises a detection unit, a main control unit, an alarm unit and a power supply unit. The detection unit comprises a magnetic field sensor (U2) and a peripheral circuit of the magnetic field sensor (U2), wherein the model of the magnetic field sensor (U2) is MAG3110. The main control unit comprises a singlechip (U1) and a peripheral circuit of the singlechip (U1), wherein the model of the singlechip (U1) is STC12LE5A60S2, and the peripheral circuit contains a clock circuit and a hand reset circuit. The burglar alarm device based on the magnetic field sensor has the advantages of being simple in structure, reasonable in design, high in detection reliability, low in cost, small in size and the like.
Description
technical field [0001] The invention relates to an anti-theft alarm device, in particular to an anti-theft alarm device based on a magnetic field sensor. Background technique [0002] At present, the shortcomings of the alarm devices commonly used in existing exhibition halls and museums in my country are as follows: [0003] 1. Multi-dimensional standing wave alarm: The disadvantage is that the air flow will affect the detector, so it needs to be used in an environment with little air circulation to improve the recognition rate. Moreover, the ultrasonic waves emitted by the multi-dimensional standing wave detector use air as the transmission medium, and the temperature and relative humidity of the air will affect its detection sensitivity. [0004] 2. Passive infrared alarm: The disadvantage is that it is susceptible to interference from various heat sources, sunlight sources and radio frequency radiation. Passive infrared penetration is poor, and the infrared radiation o...
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IPC IPC(8): G01R33/02
Inventor 桑胜波邓丽莉张文栋李朋伟胡杰李刚唐晓亮奉辉
Owner TAIYUAN UNIV OF TECH