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Ultrasonic time-domain detection method for pore defect of epoxy casting insulation part

A technology of epoxy casting and detection method, which is applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze solids, can solve the problems of great harm to human body, inconvenient operation, etc., and achieve the effect of low device cost

Inactive Publication Date: 2016-10-26
PINGGAO GRP +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ultrasonic detection method for the porosity defects of epoxy cast insulation parts used in high-voltage switchgear to replace X-ray detection, so as to avoid the problems of X-ray detection that are harmful to human body and inconvenient to operate.

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  • Ultrasonic time-domain detection method for pore defect of epoxy casting insulation part
  • Ultrasonic time-domain detection method for pore defect of epoxy casting insulation part
  • Ultrasonic time-domain detection method for pore defect of epoxy casting insulation part

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] Such as figure 1 Shown is an embodiment of an ultrasonic detection system, including an ultrasonic transmitter, an ultrasonic receiver, a probe, an oscilloscope and a background computer. The ultrasonic transmitter emits ultrasonic waves to the insulating part to be tested through the probe, and the ultrasonic receiver receives the reflected waves, which are converted into time-voltage waveforms by the oscilloscope, and analyzed and calculated by the background computer. Coupling agent is applied between the probe and the insulating part to be tested.

[0024] Such as figure 2 Another embodiment of the ultrasonic detection system includes an ultrasonic flaw detector, a joint, a probe, an oscilloscope and a background computer. The ultrasonic flaw detector is connected to the joint through the wire, the joint is connected to the probe, and the joint...

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Abstract

The invention relates to an ultrasonic time-domain detection method for a pore defect of an epoxy casting insulation part. The method comprises steps as follows: firstly, an ultrasonic velocity in a to-be-detected insulation material is detected; ultrasonic pulse is emitted to a to-be-detected insulation part, a reflected wave is detected and converted into a time-voltage signal, an abrupt change point of a waveform is found, time corresponding to the abrupt change point is recorded, the abrupt change point of the waveform corresponds to the pore defect in the insulation material, and the position and the dimension of the pore defect are calculated according to the time corresponding to the abrupt change point and the ultrasonic velocity obtained in the former step. With the adoption of the method for detection, the application of ultrasonic detection in a material such as the epoxy insulation part with large ultrasonic attenuation coefficient becomes possible. Besides, according to establishment of a detection system for implementing the method, the required device cost is lower, and radiation hazard caused by a radiographic detection method is avoided.

Description

technical field [0001] The invention relates to an ultrasonic detection method for air hole defects of an epoxy cast insulating part for high-voltage switchgear. Background technique [0002] Epoxy cast insulator is one of the key components of high-voltage switchgear, which plays an important role in insulating, supporting, and dividing gas chambers. Its performance will directly determine the insulation performance and operational reliability of high-voltage switchgear. For the quality inspection of epoxy cast insulation parts, the commonly used method is X-ray real-time imaging inspection technology. Although this method has the advantages of high efficiency, fast speed, low long-term use cost, convenient image processing and easy storage, the radiation is harmful to the human body and needs to be detected in a special protective room, which is not conducive to on-site and online conditions. . At the same time, the one-time investment of X-ray real-time imaging equipmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/07
CPCG01N29/07
Inventor 李继承田浩林生军袁端鹏郝留成侯亚峰刘恒
Owner PINGGAO GRP
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