Metal detection module of security door

Abstract

The invention relates to a metal detection module of a security door. The metal detection module is characterized in that the metal detection module comprises a 6V direct-current power supply, a high-frequency oscillation circuit, a double-voltage detection and stabilization circuit, a direct-current signal amplification and status indication circuit and a buzzer drive circuit; the high-frequency oscillation circuit is composed of a high-frequency oscillation transformer B, a capacitor C3, an NPN transistor BG1, a potentiometer RP, a resistor R1, a capacitor C1, a resistor R2 and a capacitor C2; the double-voltage detection and stabilization circuit is composed of a winding I of the high-frequency oscillation transformer B, a germanium diode D1, a germanium diode D2 and a electrolytic capacitor C4; the direct-current signal amplification and status indication circuit is composed of an NPN triode BG2, an LED and a resistor R4; the buzzer drive circuit is composed of an NPN triode BG3 and a buzzer HA. The metal detection module of the security door is suitable for solving the security problems of supermarkets, banks, shopping malls, warehouses, and the like in a small area.

Description

technical field [0001] The invention belongs to the field of electronics and security technology, and relates to a metal detection module for a security door. Background technique [0002] In order to prevent or prevent criminals from carrying prohibited items such as knives and guns into public places to wait for opportunities to commit crimes, in order to prevent such terrorist attacks from happening, avoid causing heavy casualties and property losses, and cause extremely bad negative effects on society. After a long period of practice testing, the security gate is one of the effective security tools. The security gate is a detection device for detecting whether a person carries metal objects. It is mainly used in airports, stations, subways, gymnasiums, exhibition halls, museums, large conferences and other public places with a large flow of people to check hidden guns on people's bodies. , control of metal objects such as knives. When the inspected person passes throug...

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