互感式自调零正交涡流传感器设计与研究
Design and Research of Mutual-inductive Self-Nulling Orthogonal Eddy Current Sensor
任学志 1杨明 1金亚曦 1曹军帅 1杨正好 1徐笑娟2
作者信息
- 1. 国网安徽省电力有限公司马鞍山供电公司
- 2. 安徽工业大学电气与信息工程学院
- 折叠
摘要
针对涡流检测过程中传感器易发生提离和摇晃造成缺陷误判和漏检的问题,利用电磁场理论,研究了双Pancake式线圈之间的零互感特性,提出了一种互感式正交自动调零涡流传感器;同时搭建了基于六轴机器人引导的涡流检测系统,对铝筒体轴向和环向表面裂纹进行了相关实验研究.结果表明:相比同轴型涡流传感器,该传感器在筒体缺陷检测过程中对提离和摇晃的抑制力更佳,通过面内旋转其激励线圈至0°和90°,能够清晰地识别出铝筒体轴向和环向的表面裂纹.该传感器在不依赖高精度姿态校准前提下,有效解决了提离和摇晃造成缺陷误判和漏检的问题,对导电结构外场原位检测具有重要的应用意义.
Abstract
To solve the problem that the sensor is prone to lift-off and shaking during eddy current testing(ECT)process,which causes defect misjudgment and leakage detection,the electromagnetic field theory was used to study the zero mutual inductance characteristic between the double pancake coils,thus designing a mutual-inductive self-nulling orthogonal eddy current(EC)sensor.Then an ECT system guided by an industrial six-axis robot was developed,and a series of experiments were carried out.Results show that the proposed EC sensor has better suppression of lift-off and shaking than the coaxial EC sensor when detecting defects in the cylinder structure,and surface cracks along the axial and circumferential directions of the cylinder can be clearly identified by rotating its excitation coil in the plane to 0° and 90°.The designed self-nulling EC sensor effectively solves the problem of misjudgment and leakage detection of defects caused by lift-off and shaking without relying on high-precision attitude calibration,which has important application significance for in-situ detection of the conductive structures in the external field.
关键词
涡流检测/提离效应/正交涡流传感器/零互感特性/铝筒体/裂纹检测Key words
ECT/lift-off effect/orthogonal EC sensor/zero mutual-induction characteristic/aluminum cylinder/crack detection引用本文复制引用
基金项目
国网马鞍山供电公司项目(B312B023000C)
出版年
2024
NETL
NSTL
万方数据