油气管道内表面涡流无损检测系统设计  

Design of Eddy Current Non-destructive Testing System for Inner Surface of Oil and Gas Pipelines

作　　者：焦靖淇 王平[1] JIAO Jingqi;WANG Ping(Key Laboratory of the Ministry of Industry and Information Technology for Non-destructive Testing and Monitoring Technology of Highspeed Carrier Facilities,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学高速载运设施的无损检测监控技术工信部重点实验室,江苏南京210016

出　　处：《机械制造与自动化》2025年第1期16-19,共4页Machine Building & Automation

基　　金：国家自然科学基金项目(2020YFC3005000)。

摘　　要：基于电涡流感应原理设计一种多通道的差分检测探头,通过两线圈信号差分的方式,减少共模信号的干扰。采用功率检波器对缺陷信号的幅值进行快速提取,相较于数字相敏检波更加快捷直观。搭建上位机平台,实现对多通道缺陷信号的采集。分析对比不同深度、不同宽度凹坑缺陷信号的差异性。实验结果表明:该涡流无损检测系统可对深度1 mm、半径5 mm的凹坑缺陷实现有效检测,并对不同深度、不同宽度的缺陷有较好的分辨能力。A multi-channel differential detection probe is designed based on the principle of eddy current,reducing the interference of common mode signals through the differential signal of two coils.With the application of a power detector,the amplitude of defect signals is quickly extracted,which is faster and more intuitive compared to digital phase sensitive detection.An upper computer platform is built to collect multi-channel defect signals,and the differences in pit defect signals with different depths and widths are analyzed and compared.The experimental results show that the eddy current non-destructive testing system can effectively detect pit defects with a depth of 1 mm and a radius of 5 mm,and has good resolution ability for defects with different depths and widths.

关 键 词：电涡流传感器 功率检波技术 差分探头 系统设计 缺陷检测 

分 类 号：TB302.5[一般工业技术—材料科学与工程]