基于电磁超声技术的管道壁厚检测研究  

Research on Thickness Testing of Pipeline Based on Electromagnetic Ultrasonic

作　　者：李继承 戚政武 苏宇航 杨宁祥 Li Jicheng;Qi Zhengwu;Su Yuhang;Yang Ningxiang(Guangdong Province Special Equipment Inspection and Research Institute Zhuhai Branch,Zhuhai 519000)

机构地区：[1]广东省特种设备检测研究院珠海检测院,珠海519000

出　　处：《中国特种设备安全》2023年第S02期52-55,66,共5页China Special Equipment Safety

基　　金：广东省市场监督管理局科技项目“石化装置高温管道壁厚腐蚀减薄在线监测系统研发”(2023CT04)。

摘　　要：将电磁超声技术应用于管道壁厚检测现场时,由于探头换能效率低而导致底面反射信号弱、测量结果精度低、数据稳定性差等问题出现。本研究采用试验验证的方法对电磁超声探头中,检测线圈的缠绕圈数和永磁铁的磁场强度进行了优化,并在外径100 mm和300 mm的碳钢管道上进行了壁厚检测试验。结果表明:随着检测线圈圈数和磁场强度的增大,底面反射信号的波形更加清晰、幅度更高,整个声程范围内的噪声干扰明显降低。优化后的电磁超声检测系统能够满足管道壁厚检测的技术要求。When electromagnetic ultrasonic technology is applied to the pipeline thickness testing,problems such as weak energy of the reflection wave from bottom surface,low measurement accuracy,and poor data stability occur due to the low conversion efficiency of the probe.In this study,the method of experimental verification was used to optimize the winding number of the detection coil and the magnetic field strength of the permanent magnet in the electromagnetic ultrasonic probe.The wall thickness testing was carried out on carbon steel pipes with outer diameter of 100 mm and 300 mm.The results show that with the increasing of coil number and magnetic field strength,the waveform of the reflected signal from the bottom surface is clear,the amplitude is higher,and the noise interference in the whole sound path range is obviously reduced.The optimized electromagnetic ultrasonic testing system can fulfill the technical requirements of pipeline thickness measuring.

关 键 词：电磁超声 管道测厚 检测线圈 偏置磁场 

分 类 号：X924.2[环境科学与工程—安全科学]