压力容器2025，Vol.42Issue(6)：63-73,11.DOI:10.3969/j.issn.1001-4837.2025.06.008
带涂层压力容器腐蚀缺陷脉冲涡流检测及内外伤区分方法研究
Research on pulsed eddy current testing and internal/external damage discrimination methods for corrosion defects in pressure vessels with coatings
摘要
Abstract
Due to the unknown lift-off distance and probe attitude,there was a great error in defects detection in pressure vessels with coatings.In order to improve the detection accuracy,a pulsed eddy current detection and signal processing method was proposed for corrosion and thinning defects in pressure vessels under unknown lift-off state.Firstly,the simulation software was used to establish a pulsed eddy current detection model for corrosion defects,and studied the relationship between the detection signal and the lift-off distance.Then,key characteristic parameters were used to eliminate the lift-off interference,constructed a calibration curve for characterizing the change of the material thickness,and optimized the differentiation method of different types of defects by combining with the frequency domain analysis.Finally,an experimental test system was built to test steel plate specimens with different corrosion thinning defects.The results show that the method can effectively suppress the lift-off effect,accurately recognize the thickness change of 1 mm on the specimen surface within the range of 0～9 mm lift-off,and distinguish the defect types.This method can be used for high-precision detection and classification identification of corrosion defects in pressure vessels under unknown lift-off.关键词
脉冲涡流/腐蚀缺陷/未知提离/缺陷分类/信号处理Key words
pulsed eddy current/corrosion defects/unknown lift-off/defects classification/signal processing分类
机械工程引用本文复制引用
张永红,黄琳枝,陈涛,徐拥军,宋小春,何鹏..带涂层压力容器腐蚀缺陷脉冲涡流检测及内外伤区分方法研究[J].压力容器,2025,42(6):63-73,11.基金项目
陕西省市场监督管理局科技计划项目(2023KY09) （2023KY09）
湖北省自然科学基金项目(2025AFD724) （2025AFD724）
