Composite flat sample three-dimensional space charge measurement device based on pulsed electro-acoustic method

An electroacoustic pulse method and flat sample technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., to achieve the effect of improving measurement accuracy

Active Publication Date: 2018-05-29
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a three-dimensional space charge measurement device for a composite flat sample based on the electroacoustic pulse method, which can measure the composite flat sampl

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  • Composite flat sample three-dimensional space charge measurement device based on pulsed electro-acoustic method
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  • Composite flat sample three-dimensional space charge measurement device based on pulsed electro-acoustic method

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Embodiment Construction

[0030] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

[0031] see figure 1 , a three-dimensional space charge measuring device for a composite flat sample based on the electroacoustic pulse method of the present invention, comprising a DC high voltage generator 1, a nanosecond high voltage pulse generator 2, an upper electrode, a lower electrode, a needle electrode 14, and a plate elect...

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Abstract

The invention discloses a composite flat sample three-dimensional space charge measurement device based on a pulsed electro-acoustic method. The composite flat sample three-dimensional space charge measurement device comprises an upper electrode and a lower electrode, wherein an aluminum electrode is arranged in the upper electrode, a dual-layer composite flat plate dielectric sample is arranged between the aluminum electrode and the lower electrode, a pin electrode and a pin electrode are arranged between layers of the dual-layer composite flat plate dielectric sample, an absorption layer used for absorbing acoustic waves is arranged in the lower electrode, a piezoelectric sensor is arranged on the absorption layer, the piezoelectric sensor is connected with an amplifier, and the amplifier is connected with a computer by means of an A/D converter. The composite flat sample three-dimensional space charge measurement device successfully reproduces the accumulation, dissipation and migration characteristics of the space charges in a composite flat plate sample in an orthogonal nonuniform electric field, more realistically simulates the electric field environment of the sample under real working conditions, fully utilizes a greater number of piezoelectric films and makes all the piezoelectric films be closely attached to the lower surface of the lower electrode, breaks through thecurrent limitation that only one-dimensional space charge distribution in a uniform electric field can be measured, and improves the reliability of space charge measurement results.

Description

technical field [0001] The invention belongs to the technical field of space charge distribution measurement in a composite insulating material, and in particular relates to a three-dimensional space charge measurement device for a composite flat sample based on an electroacoustic pulse method. Background technique [0002] The electroacoustic pulse method is one of the widely used methods for measuring the space charge distribution at home and abroad. By injecting a high-voltage DC electric field and nanosecond pulses, the space charge behavior in insulating materials can be obtained through amplifiers and subsequent deconvolution calculations. At present, this method has been successfully used to measure the space charge of insulating materials under coaxial electrodes and flat electrodes. [0003] The prior art records a detachable electroacoustic pulse space charge measuring device, which is composed of a DC high voltage power supply, a nanosecond pulse generator, upper...

Claims

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Application Information

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IPC IPC(8): G01R29/24
CPCG01R29/24
Inventor 王霞余栋段胜杰王华楠张宇巍郝佳齐
Owner XI AN JIAOTONG UNIV
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