An electrostatic detection device

Abstract

An electrostatic detection device, which includes a housing, a metal shielding cover placed in the housing, a metal bracket and an induction metal sheet arranged inside the metal bracket, a circuit board, and network ports arranged at both ends of the electrostatic detection device; the induction metal sheet , the metal bracket, and the metal shield are installed on the circuit board, and the circuit board is fixedly installed on the shell; among them, the piezoelectric ceramic sheet is attached to the inner side of the metal bracket; the metal shield and its shell are located at the position of the metal induction sheet, corresponding There are windows as detection areas. The static electricity detection device can improve the static electricity detection precision and the static electricity detection range.

Description

technical field [0001] The invention relates to an electrostatic detection device. Background technique [0002] Existing electrostatic detection devices usually use vibrating capacitive sensors for electrostatic detection, which use piezoelectric ceramics as vibration elements. The vibration capacitor is a vibrating metal sheet. Due to mechanical vibration, the capacitance between the detection electrode and the measured object changes periodically. Under the action of the electrostatic induction of the measured body, the induced voltage on the plate also changes periodically. . The vibrating capacitive sensor senses the electrostatic electric field through the alternating capacitance to measure the electrostatic potential. The principle is that the change of the capacitance C of the plate capacitor placed in the electrostatic field causes the change of the charge on the plate to generate a weak signal, which can be reused The weak signal detection circuit amplifies the s...

AI Technical Summary

Problems solved by technology

[0003] However, the existing electrostatic detection devices have disadvantages such as low detection accuracy, low intelligence, and small measurement range.

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