Device and method for calibrating non-contact type electrostatic voltmeter

Abstract

The invention provides a device and method for calibrating a non-contact type electrostatic voltmeter. The method includes the steps that a direct-current high-voltage power supply and metal plate electrodes are utilized to acquire a standard static filed at local space near the centers of the electrodes, the voltage of the non-contact type electrostatic voltmeter can be traced to the direct-current voltage standard, and an experimental method that the edge effect is increased is adopted to test the edge effect of the metal plate electrodes. The risks that people get an electric shock are reduced through a glass flat plate support which bears the metal plate electrodes and through a protective resistor, and a perpendicular moving mechanism can adjust the test distance of a calibrated meter. A detachable vernier caliper is adopted, and therefore tracing is convenient to conduct.

Description

technical field [0001] The invention relates to a calibration device and a calibration method for a non-contact electrostatic voltmeter and an electrostatic electric field meter, belonging to the field of electromechanical integration instruments. Background technique [0002] Electrostatic voltmeters are widely used in electrostatic protection measurements and static research, and there are two types, contact and non-contact. Among them, the non-contact electrostatic voltmeter is a commonly used one. It uses the principle of electric field induction or other principles to measure the voltage and electric field value of the surface without contacting the surface to be tested. The voltage is referenced to infinity or earth. If the measurement result is displayed as an electric field [volt / meter], it is called a Static Field Meter; if the measurement result is displayed as a voltage [volt], it is called a non-contact electrostatic voltmeter. The distance to the surface to b...

AI Technical Summary

Problems solved by technology

[0004] The existing technology has the following problems: (1) Literature (1) uses a fixed-size metal plate electrode as a standard electrostatic field generator, and the impact on the edge effect cannot be quantitatively evaluated

(2) The bare metal plate electrode is directly connected to the DC high voltage source, which may cause electric shock hazards, especially when reading the readings of the non-contact electrostatic voltmeter, the personnel must be close to the charged metal conductor, which is even more dangerous

(3) The test distance is the parallel distance between the front end of the calibrated instrument and the metal plate. It is difficult to measure, and the adjustment mechanism needs periodic calibration or verification. The overall inspection cost is high and transportation is difficult.

(4) The edge effect tests of the above documents (2) and (3) are the same method, requiring a precise parallel movement mechanism

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