Mechanical vibration structure for vibration capacitance type electrostatic sensor

Abstract

The invention discloses a mechanical vibration structure for a vibration capacitance type electrostatic sensor, which comprises an electrostatic sensor, a to-be-tested product is arranged outside the electrostatic sensor, a vibration generator is arranged inside the electrostatic sensor, a tail end fixing bracket is arranged at one end of the vibration generator, a connecting beam is arranged on one side of the tail end fixing bracket, and a vibration sensor is arranged on the connecting beam. The other side of the connecting beam is provided with a first mechanical vibration beam, one end of the first mechanical vibration beam is provided with a first vibration sheet, the first mechanical vibration beam is provided with a first ceramic sheet, and during measurement, the first ceramic sheet is electrified to generate vibration, drives the first vibration sheet to vibrate, periodically shields the induction surface of the electrostatic sensor, and changes the capacitance; the device generates periodic current signals, introduces the periodic current signals into a signal detection circuit, converts the periodic current signals into voltage signals and amplifies the voltage signals to obtain electrostatic induction measurement processing signals, completes detection, is scientific and reasonable in structure and safe and reliable to use, and provides great help for people.

Description

technical field [0001] The invention relates to the technical field of electrostatic testing, in particular to a mechanical vibration structure for a vibration capacitive electrostatic sensor. Background technique [0002] The research results of electrostatics are gradually applied to all walks of life, using the effects and principles of electrostatic induction and gas discharge of high-voltage electrostatic fields to realize various processing techniques and processing equipment, such as electrostatic dust removal, copying, spraying, spinning, flocking, etc. ; But the existence of static electricity will also bring some threats and hidden dangers. Electrostatic discharge (ESD) will cause electronic equipment failures and malfunctions, promote the aging of electronic devices, and reduce production yields. It is easy to cause explosion and fire, and electrostatic adsorption leads to uneven winding of film, plastic, paper and printing industries, affecting product quality an...

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Problems solved by technology

Among them, the variable pole distance method is to change the vertical distance between the plates. In this method, when the plates vibrate up and down, there will be non-parallel conditions, which will cause the relative area of ​​the plates to change. The large air damping will lead to inconsistent amplitudes each time. The two variables simultaneously The change causes the increase of the measurement error of the sensor; the variable area rule changes the relative surface area between the plates, but the traditional measurement direction adopts horizontal measurement, resulting in a larger relative surface area between the sensor as a whole and the product to be tested, which accelerates the discharge of static electricity and changes the surface charge The distribution state of the vibration beam affects the accuracy of electrostatic measurement; at the same time, the structure is mostly fixed by bonding, and the installation position cannot be unified, resulting in poor consistency of the device; the unreasonable connection of the vibration beam leads to inconsistent transmission, small vibration amplitude and easy interference

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