A Rechargeable, Sensitivity Adjustable, High Sensitivity Handheld Metal Detector

Abstract

The invention discloses a rechargeable, sensitivity-adjustable and high-sensitivity handheld metal detector. The metal detector comprises a Seiler oscillation module, a double voltage rectification and filtering module, a sensitivity adjustment and DC comparator module, and a lithium battery, wherein the Seiler oscillation module outputs a detection signal to the double voltage rectification and filtering module; the double voltage rectification and filtering module outputs a signal after rectification and filtering to the sensitivity adjustment and DC comparator module; and the lithium battery is used for supplying power. The metal detector adopts a unique circuit design, such that a user can adjust the sensitivity in a wide range easily, so as to adapt to various usage scenarios. In cases where high sensitivity is required, the highest sensitivity of the instrument (without causing spurious triggering) can be simply and directly adjusted to. The metal detector adopts the lithium battery and the low power consumption design, the built-in lithium battery can be fully charged in only two hours, and the metal detector can be continuously used for more than 60 hours after the lithiumbattery is fully charged.

Description

technical field [0001] The invention discloses a hand-held metal detector, in particular a rechargeable, adjustable-sensitivity, high-sensitivity hand-held metal detector, which belongs to the technical field of metal detectors. Background technique [0002] Handheld metal detectors are widely used in various fields, such as: security in stations, airports, examination rooms and other places; detection of inside walls, shallow underground layers, and metal water supply and drainage pipes during construction; in wood, food and other processing factories Detection of metal impurities in raw materials and products, etc. [0003] In different fields of use, the required detection sensitivity is not the same. The existing hand-held metal detectors are inconvenient to adjust the sensitivity, especially in some applications that require high detection sensitivity. If the sensitivity is too high, it will easily lead to false alarms, and if the sensitivity is too low, it will be dif...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the inconvenient sensitivity adjustment of the hand-held metal detector in the prior art mentioned above, the present invention provides a rechargeable, adjustable-sensitivity, high-sensitivity hand-held metal detector, which uses a Schiller oscillating circuit, two The voltage doubler rectifier filter circuit cooperates with the sensitivity adjustment and voltage comparator circuit to realize the detector with high sensitivity, adjustable sensitivity and easy adjustment, fast charging and long battery life.

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