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Device and method for calibrating non-contact type electrostatic voltmeter

An electrostatic voltmeter, non-contact technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of high inspection cost, difficult measurement, and inability to quantitatively evaluate the influence of edge effects, and achieve the effect of strong practicability.

Active Publication Date: 2014-01-08
BEIJING DONGFANG MEASUREMENT & TEST INST
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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

Method used

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  • Device and method for calibrating non-contact type electrostatic voltmeter
  • Device and method for calibrating non-contact type electrostatic voltmeter
  • Device and method for calibrating non-contact type electrostatic voltmeter

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Embodiment Construction

[0056] Such as image 3 As shown, the overall schematic diagram of the device of the present invention, the non-contact electrostatic voltmeter calibration device consists of a DC high voltage source 1, a protection resistor 2, a selector switch 3, a high voltage wire 4, a central metal electrode plate 5, an edge metal electrode plate 6, and a glass substrate support 7. Lap joint plate 8, vernier caliper 9, vertical motion mechanism 10, and calibrated non-contact electrostatic voltmeter 20; the output of DC high-voltage power supply 1 is connected to one end of protection resistor 2, and the other end of protection resistor 2 is connected through high-voltage wire 4 for selection The left pin of the switch 3, the right pin of the selection switch 3 is connected to the ground wire of the DC high voltage source 1, the middle pin of the selection switch 3 is connected to the center metal electrode plate 5 and the edge metal electrode plate 6 through the high voltage wire 4, and th...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
Inventor 刘民袁亚飞罗宇轩佟雷王鹤展
Owner BEIJING DONGFANG MEASUREMENT & TEST INST
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