Metal detector

Abstract

The invention discloses a metal detector. The metal detector comprise a coil oscillation circuit and a control circuit; the coil oscillation circuit comprises a multivibrator, a first amplification circuit and a detection coil which are connected in order; the control circuit comprises a single-chip microcomputer, the single-chip microcomputer is connected with a display module, a power supply module, an A / D conversion module and an alarm circuit in order, the A / D conversion module is connected with a peak detection module, a second amplification circuit and a Hall element in order, and the Hall element is connected with the detection coil. The metal detector solves the problem of low detection precision in prior art.

Description

technical field [0001] The invention belongs to the technical field of detection and relates to a metal detector. Background technique [0002] Metal detectors, as one of the most important safety inspection equipment, have been widely used in many fields of social life and industrial production. For example, in airports, large-scale sports games (such as the Olympic Games), and exhibitions, metal detectors are used to carry out safety inspections on passing personnel to check luggage, packages, and harmful prohibited metal objects such as knives, guns, and ammunition carried by the human body; industrial sectors (including factories that produce metal products such as watches, glasses, gold and silver jewelry, electronics, etc.) also use metal detectors to detect people entering and leaving to prevent the loss of precious metal materials; at present, even examinations have begun to use metal detectors to detect Prevent candidates from using mobile phones and other tools to...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a metal detector, which solves the problem of low detection accuracy existing in the prior art

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