A non-contact static detection device

Abstract

The invention discloses a non-contact static detection device, which comprises a static sensor, an electronic switch and an electric signal processing unit, wherein the static sensor comprises a sensing electrode and a coupling electrode; the sensing electrode is a metal static signal receiving surface; the coupling electrode is a metal electrode; the sensing electrode and the coupling electrode construct a capacitor of fixed capacitance; the sensing electrode is electrically connected with the electronic switch; and the electric signal processing unit is used for grounding or suspending the sensing electrode alternatively by controlling the electronic switch, and is also used for performing subsequent processing on an alternating signal acquired from the coupling electrode to convert the processed alternating signal into an electric field value. The non-contact static detection device has the characteristics of no mechanical part, high coupling capacitance variation quantity, high sensitivity, flexible sensor design and easiness in realizing; and by selecting the static sensor, static electricity or weak static electricity in tiny regions can be measured in real time and absolutely.

Description

technical field [0001] The invention relates to a non-contact static detection device, which belongs to the technical field of detection. Background technique [0002] The non-contact electrostatic detection device is the basic device for electrostatic field or electrostatic detection, and is widely used in the detection of human body static electricity, object surface static electricity and space electrostatic field. The currently used non-contact detection sensors are variable capacitance, including rotary vane and vibrating capacitive sensors, both of which have mechanical parts. [0003] The rotary vane sensor includes two electrodes, the upper electrode is figure 1 The rotating electrode shown in the interval pattern, the rotating electrode can rotate around the central axis, the capacitance between the upper and lower electrodes will change during the rotation process, so that the interval between the two electrodes generates electrical signals, through the collection...

AI Technical Summary

Problems solved by technology

Although the vibration frequency of the vibrating capacitive sensor is relatively high, the vibration amplitude is relatively small, so the capacitance change is still relatively small in actual measurement, so the detection sensitivity will also be greatly limited, and it is difficult to detect static electricity or electrostatic fields in small areas

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