Nondestructive Testing Method of Post Porcelain Insulator Based on Pulsed Infrared Thermal Wave Technology

被引：0
|
作者：
Wang L. [1 ]
Liu L. [1 ]
Mei H. [1 ]
Guo C. [2 ]
Zhao C. [1 ]
Feng L. [3 ]
机构：
[1] Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province
[2] Electric Power Research Institute of Yunnan Power Grid Co., Ltd., Kunming, 650200, Yunnan Province
[3] Department of Physics, Capital Normal University, Haidian District, Beijing
来源：
| 1600年 / Chinese Society for Electrical Engineering卷 / 37期
基金：
中国国家自然科学基金;
关键词：
Infrared thermal image; Logarithmic temperature-time plot; Nondestructive testing; Peak second-order derivative time; Porcelain post insulator; Pulsed infrared thermography; Surface crack defect;
D O I：
10.13334/j.0258-8013.pcsee.162146
中图分类号：
学科分类号：
摘要：
In order to prevent fracture accidents of porcelain post insulators in power grid, a nondestructive testing method based on pulsed infrared thermography was presented for detecting defects of porcelain post insulator. In pulsed infrared thermography, the sample was heated instantaneously by a high energy flash pulse while an infrared camera monitors the changes of surface temperature. The defects of insulator could be identified and qualified via infrared thermal images sequence processing and analysis. Crack defects of different sizes on the surface of porcelain post insulator were detected and identified by applying infrared thermal image and logarithmic temperature-time plot, and the accuracy of defect detection was obtained about 0.4mm. The results show that pulsed infrared thermography can be used for detecting the defects of porcelain post insulator quickly, remotely, visually and effectively. Finally the defect depth was measured according to the peak time of second-order derivative of logarithmic temperature. In conclusion, the feasibility of applying pulsed infrared thermography to detect the defects of porcelain post insulator was verified by the experiments. © 2017 Chin. Soc. for Elec. Eng.
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页码：7359 / 7366
页数：7
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