一种基于局部热释应变的环氧绝缘件残余应力无损测量方法
By constructing a model relating residual stress on the surface of insulating components to material modulus and coefficient of thermal expansion, and utilizing laser irradiation and strain gauge measurements, the problem of residual stress detection in pot-type insulators was solved, achieving efficient, accurate, and non-destructive monitoring of insulator stress and ensuring the safe and stable operation of the power system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANJIN UNIV
- Filing Date
- 2025-12-17
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies are insufficient to effectively detect residual stress in pot-type insulators, which makes the insulators prone to cracking under high-voltage conditions, threatening the safety of the power system and the reliability of power supply.
A model was constructed to establish the relationship between the surface residual stress of epoxy insulation components under laser source heating conditions and the material modulus and coefficient of thermal expansion. The surface residual stress of the insulation components was then measured non-destructively using laser irradiation and strain gauges.
It achieves efficient and accurate monitoring of residual stress on the surface of insulating components, non-destructive testing, with an error of less than 5% and a spatial resolution of ≤2 mm. It is applicable to various types of insulators, has a short testing cycle, and is suitable for GIS maintenance.
Smart Images
Figure CN121521323B_ABST