Quality Assessment Method of RTV Coating Based on Pulse Radiation Measurement Technology

ZHU Wenming; ZHANG Guanying; SHEN Zekai; SUN Rui; MEI Hongwei; WANG Liming

doi:10.13296/j.1001-1609.hva.2025.12.026

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Quality Assessment Method of RTV Coating Based on Pulse Radiation Measurement Technology

Research & Analysis | 更新时间：2025-12-09

- Quality Assessment Method of RTV Coating Based on Pulse Radiation Measurement Technology
- High Voltage Apparatus Vol. 61, Issue 12, Pages: 188-194(2025)
- 作者机构：
  
  国网江苏省电力有限公司常州供电分公司，江苏常州 213000
  清华大学深圳国际研究生院，广东深圳 518055
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2025.12.026
  CLC：
- Received：15 May 2025，
  
  Revised：2025-07-02，
  
  Published：16 December 2025
- 稿件说明：
移动端阅览
ZHU Wenming, ZHANG Guanying, SHEN Zekai, et al. Quality Assessment Method of RTV Coating Based on Pulse Radiation Measurement Technology[J]. High Voltage Apparatus, 2025, 61(12): 188-194.
DOI：

ZHU Wenming, ZHANG Guanying, SHEN Zekai, et al. Quality Assessment Method of RTV Coating Based on Pulse Radiation Measurement Technology[J]. High Voltage Apparatus, 2025, 61(12): 188-194. DOI： 10.13296/j.1001-1609.hva.2025.12.026.

摘要

为防止污闪事故的发生，室温硫化硅橡胶涂层（RTV）被广泛应用于陶瓷和玻璃绝缘子表面。但随着运行年限的增加，孔洞、夹层污秽、交界面脱粘等缺陷的出现将严重影响RTV涂层的性能，给绝缘子的安全运行带来隐患。文中提出了一种基于脉冲辐射的RTV涂层质量在线无损检测方法，建立了绝缘子表面RTV涂层热波传递模型并求解了缺陷区域的表面温度分布；在时域与频域中，分别采用二阶微分峰值时间及最小相位频率平方根作为特征量，提出了涂层厚度的测量方法并比较了各自的效果。应用该方法对含有孔洞、夹层污秽、交界面脱粘3种典型结构性缺陷的RTV涂层样品开展检测，并采用厚度测量图和主成分分析（PCA）热图优化了检测的显示效果。研究结果表明，脉冲辐射测量技术可实现绝缘子RTV涂层典型结构性缺陷远程检测，是一种有效的绝缘子RTV涂层质量在线评估方法。

Abstract

Forthe prevention of pollution flashover accidents，the room temperature vulcanized（RTV）coating has been widely used on the surface of ceramic and glass insulators. Horever，with the increase of operation time，the occurrence of such defects as void，interlayer contamination and interface debonding will seriously affect performance of the TRV coating，and bring risks to the safe operation of insulator. In this paperan on-line nondestructive detection method for RTV coating quality based on pulse radiation is proposed. The heat wave transfer model of the RTV coating on insulator surface is set up and the surface temperature distribution of defect area is solved.In both time domain and frequency domain，the second order differential peak time and the square root of the minimum phase frequency are used as the characteristic quantities，the measurement method of coating thickness is proposed and its respective effect is compared. The method is applied to detect the RTV coating samples with such three typical structural defects as void，interlayer contamination and interface debonding. The thickness measurement graphs andprincipal component analysis（PCA）thermogram are used to optimize the display effect of the detection. The research results show that the pulse radiation measurement technology can achieve remote detection of typical structural defec of RTV coating of insulator，and is an effective remote online assessment method of RTV coating quality of insulator.

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references

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