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Composite probe for polymer space charge distribution measurement and measurement method thereof

A space charge and polymer technology, applied in the measurement of electrical variables, electrostatic field measurement, components of electrical measuring instruments, etc., can solve the problems of signal danger, complicated operation of measuring space charge, etc., to achieve good safety performance and improve measurement accuracy. the effect of improving reliability

Active Publication Date: 2020-05-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an easy-to-operate and safe polymer for extracting signals from the low-voltage end in order to overcome the defects of complex operation in the actual measurement process and the danger of taking signals from the high-voltage end in order to overcome the defects of measuring space charge based on the piezoelectric pressure wave method. Composite probe for measuring space charge distribution and its measuring method

Method used

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  • Composite probe for polymer space charge distribution measurement and measurement method thereof
  • Composite probe for polymer space charge distribution measurement and measurement method thereof
  • Composite probe for polymer space charge distribution measurement and measurement method thereof

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Embodiment 1

[0064] Such as figure 1 As shown, this embodiment is a composite probe for measuring polymer space charge distribution, including a housing, a signal-taking aluminum block 1, a quartz glass block 4, a piezoelectric ceramic sheet 6, a voltage pulse transmission unit and In the signal extraction unit, a conductive material is attached to the outer surface of the quartz glass block 4, and the conductive material is in contact with the shell. The positive electrode of the piezoelectric ceramic sheet 6 is connected to the voltage pulse transmission unit, and the negative electrode is connected to the conductive material on the outer surface of the quartz glass block 4. The signal-taking aluminum block 1 is connected to the quartz glass block 4 and the signal extraction unit respectively.

[0065] In this embodiment, the piezoelectric ceramic sheet 6, the quartz glass block 4, and the signal-taking aluminum block 1 are all cylindrical, and the piezoelectric ceramic sheet 6, the quartz ...

Embodiment 2

[0102] Such as Figure 12 to 14 As shown, this embodiment is basically the same as Embodiment 1, but the difference lies in the housing. In the actual measurement of Embodiment 1, the main body sleeve 9 is fixed to the shielding box in the laboratory, and the SMA signal connector 3 is fixed on the movable telescopic The sleeve 16 is movable relative to the main sleeve 9. In this embodiment, the SMA signal-taking connector 3 is fixed on the main sleeve 9 and is fixed relative to the main sleeve 9 during the measurement process. Both solutions have the advantages of convenient use, firmness and stability, safety and reliability, etc. The following describes the housing in this embodiment in detail:

[0103] The casing of this embodiment includes a top cover 15, a main body sleeve 9 and a movable telescopic sleeve 16. The top cover 15 is fixedly connected to the voltage pulse transmission unit, and the signal-taking aluminum block 1, the quartz glass block 4 and the piezoelectric ce...

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Abstract

The invention relates to a composite probe for polymer space charge distribution measurement and a measurement method thereof. The composite probe comprises a shell and also comprises a signal acquisition aluminum block, a quartz glass block, a piezoelectric ceramic piece, a voltage pulse transmission unit and a signal extraction unit which are fixed by the shell; a conductive material is attachedto an outer surface of the quartz glass block and makes contact with the shell, a positive electrode of the piezoelectric ceramic piece is connected with the voltage pulse transmission unit, a negative electrode of the piezoelectric ceramic piece is connected with the conductive material on the outer surface of the quartz glass block, and the signal acquisition aluminum block is connected with the quartz glass block and the signal extraction unit. Compared with the prior art, signals are extracted from a low-voltage end, and the composite probe has the advantages of safety, reliability, highmeasurement accuracy, small design, convenience in carrying, simplicity in operation, easiness in installation and the like.

Description

Technical field [0001] The invention relates to the field of measuring devices for electric charge and quantity, in particular to a composite probe for measuring polymer space charge distribution and a measuring method thereof. Background technique [0002] Polyethylene materials are widely used in high-voltage DC transmission networks due to their excellent electrical and insulating properties, low price, and simple equipment maintenance. However, under the action of a strong electric field, the space charge inside the polyethylene will gradually accumulate, causing local distortion of the electric field in the insulating medium, and even seriously affecting the insulation performance of the polymer. Therefore, the space charge problem in polyethylene has always been an important issue in the field of high voltage insulation. Piezoelectric pressure wave method and laser pressure wave method (LIPP method) are the two main measurement methods of pressure wave method to measure th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/067G01R29/14
CPCG01R1/06777G01R29/14G01R29/24
Inventor 张冶文曹泽宾徐景贤郑飞虎
Owner TONGJI UNIV
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