绝缘子室温硫化硅橡胶涂层热波模型及其涂覆质量无损检测方法

doi:10.19595/j.cnki.1000-6753.tces.210562

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Abstract The quality of room temperature vulcanized silicone rubber (RTV) coating on insulators is an important index for evaluating its application effect. Various kinds of defects introduced during the coating construction process, such as damage, impurities, debonding, uneven thickness, etc., will seriously deteriorate the insulator's external insulation performance, and bring potential threats to the safe and reliable operation of the equipment. This paper proposes a nondestructive testing technique for RTV coating quality based on photothermal radiometry. This method obtains the internal structure information by analyzing the surface transient temperature field of the specimen after applying thermal excitation. First, the thermal wave model of insulator RTV coating was established and solved; typical defects of RTV coating were detected, and the defect signal was enhanced by principal component analysis and independent component analysis; finally, the inverse square root of the frequency of minimum phase was extracted from the phase spectrum of transient thermal response to quantitatively characterize the RTV coating thickness. Research shows that this method can achieve rapid, accurate, non-contact detection of the quality of insulator RTV coatings, and has broad application prospects.

Key words： Room temperature vulcanized silicone rubber photothermal radiometry thermal wave model inverse square root of the frequency of minimum phase thickness measurement

Received: 20 April 2021

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TM216

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	Articles by authors
	Guo Chenjun
	Liu Lishuai
	Tu Yanxin
	Mei Hongwei
	Wang Liming

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Guo Chenjun,Liu Lishuai,Tu Yanxin等. Thermal Wave Model of Room Temperature Vulcanized Silicone Rubber Coating on Insulators and Nondestructive Testing Method for Coating Quality[J]. Transactions of China Electrotechnical Society, 2022, 37(11): 2753-2760.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.210562 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I11/2753

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