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Dielectric polarization capacitive electrostatic field measurement method and system

A technology of polarized capacitance and measurement method, which is applied in the direction of electrostatic field measurement, measurement device, and electric/magnetic device to transmit sensing components, etc., which can solve the problems of complex implementation of photoelectric system, achieve ingenious structure and increase the amount of change , Improve the effect of sensitivity and accuracy

Pending Publication Date: 2019-12-20
TSINGHUA UNIV
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Problems solved by technology

[0009] The purpose of the present invention is to propose a dielectric polarization capacitive electrostatic field measurement method and system for the shortcomings of the above-mentioned existing "field grinding" electrostatic field measurement system with moving parts and the complex implementation of the photoelectric system

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  • Dielectric polarization capacitive electrostatic field measurement method and system
  • Dielectric polarization capacitive electrostatic field measurement method and system
  • Dielectric polarization capacitive electrostatic field measurement method and system

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Embodiment Construction

[0037] The dielectric polarization capacitive electrostatic field measuring method proposed by the present invention comprises the following steps:

[0038] (1) prepare a sensor, the structure of the sensor is as follows figure 1 As shown, it is composed of a pair of electrodes 1 and a capacitor core 2. The pair of electrodes 1 are two conductor plates bonded on both sides of the capacitor core 2. The two conductor plates are connected with two wires to form the port of the sensor;

[0039] (2) Apply a voltage to the sensor port prepared in step (1), which is provided by the voltage source 3, so that the dielectric constituting the capacitor core 2 is polarized in a direction perpendicular to the conductor plate, and the dielectric of the capacitor core 2 is polarized. Work at the working point where the capacitance value of the sensor port changes greatly;

[0040] (3) the voltage-added sensor of step (2) is placed in the measured electrostatic field 6, and the measured elec...

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Abstract

The invention relates to a dielectric polarization capacitive electrostatic field measurement method and system and belongs to the fields of electromagnetic field measurement technologies and measuring instrument manufacturing technologies. According to the measurement system, a capacitive sensor enables a measured electrostatic field and a voltage source electrostatic field to form polarization interaction of a dielectric in two directions, so that a dielectric constant is changed, a capacitance value is changed, and then measured field intensity is converted into a change of a sensor port capacitance value; the sensor port capacitance value is measured through a capacitance measuring instrument, and the field intensity of the measured electrostatic field can be obtained; and a voltage source can make the dielectric work on an appropriate working point, so that an output and input proportionality coefficient of the sensor is increased. Through the electrostatic field measurement method, a weak electrostatic field can be measured, the measurement range is large, and the measurement sensitivity, resolution and accuracy are all high. The electrostatic field measurement system does not drive a motion component, is simple in system structure and measurement circuit and has the advantages of being high in sensitivity, small in size, easy to realize, good in stability and the like.

Description

technical field [0001] The invention relates to a dielectric polarization capacitive electrostatic field measurement method and system, and belongs to the technical field of electromagnetic field measurement technology and measuring instrument manufacturing. Background technique [0002] In many scientific research and engineering fields, the measurement of electrostatic field is a task that must be completed. For example, in the HVDC power transmission system, the electrostatic field measurement around the lines and equipment and the ground surface is an important basic data to measure whether the system meets the requirements of the electromagnetic environment and the reliability of the system operation. [0003] For electrostatic field measurement, the previous measurement systems are mainly divided into two categories: the electrostatic field measurement system based on the principle of charge induction and the electrostatic field measurement system based on the photoele...

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Application Information

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IPC IPC(8): G01R29/12G01D5/24
CPCG01R29/12G01D5/2405
Inventor 袁建生甘萌莹
Owner TSINGHUA UNIV
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