摘要
采用电磁超声传感器阵列对管道进行缺陷检测,不仅能够提高电磁超声检测信号的信噪比、灵敏度与分辨能力,同时也能增强电磁超声检测的直观性与灵活性。本文详细阐述了基于洛伦兹力的周期永磁铁阵列式电磁超声传感器(PPM-EMAT)激励超声导波的工作原理,及利用全聚焦算法结合极性一致性算法对缺陷进行定位与成像的工作机理。建立了有限元仿真模型,验证了准T(0,1)模态导波在管道结构中的传播过程。利用研制的多通道电磁超声检测系统,对含缺陷的不锈钢管道进行了检测实验,实验结果表明,研制的系统能够检测出管道试样中的多个通孔缺陷,纵向定位误差可控制在1.5%以下,实现了基于阵列电磁超声传感器的管道缺陷成像与定位。
The utilization of electromagnetic ultrasonic sensor arrays for pipe defect detection not only improves the signal-to-noise ratio,sensitivity and resolution of electromagnetic ultrasonic detection signals,but also enhances the intuitiveness and flexibility of electromagnetic ultrasonic detection.In this paper,the working principle of the Lorentz force-based periodic permanent magnet arraytype electromagnetic ultrasound transducer(PPM-EMAT)for excitation of ultrasound guided waves was referred and the mechanism of defect localization and imaging was used by the TFM and the SCF.Then the FE model was built to verify the process of quasi-T(0,1)mode guided wave propagation in a pipeline structure.Finally,the developed multi-channel electromagnetic ultrasonic inspection system was used to perform actual inspection of stainless-steel pipelines with defects and verify the simulation results.The experimental results show that the developed system can detect multiple through-hole defects in the pipeline specimen,and the longitudinal positioning error can be controlled below 1.5%,which verifies that the array electromagnetic ultrasonic sensor pipeline inspection method can realize the defect imaging and defect positioning of the pipeline.
作者
刘轩
吕炎
边策
宋国荣
高杰
何存富
Liu Xuan;Lyu Yan;Bian Ce;Song Guorong;Gao Jie;He Cunfu(Department of Materials and Manufacturing of Beijing University of Technology,Beijing 100124,China;Faculty of Information Technology of Beijing University of Technology,Beijing 100124,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2023年第11期24-32,共9页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(12172016,51875010)项目资助
关键词
超声导波
管道检测
传感器阵列
电磁超声
ultrasonic guided wave
pipeline inspection
sensor arrays
electromagnetic ultrasound
