压力管道缺陷电磁超声/脉冲涡流复合检测方法研究  

Study on the Hybrid Detection Method of Pressure Pipeline Defects with EMAT/PECT

作　　者：陈涛[1,3] 何倩[1] 吕程 邓志扬 涂君 宋小春[1] CHEN Tao;HE Qian;LÜCheng;DENG Zhiyang;TU Jun;SONG Xiaochun(School of Mechanical Engineering,Hubei University of Technology,Wuhan Hubei 430068,China;Hubei Special Equipment Inspection Testing Institute,Wuhan Hubei 430077,China;Xiangyang Industry Research Institute of Hubei University of Technology,Xiangyang Hubei 441100,China)

机构地区：[1]湖北工业大学机械工程学院,湖北武汉430068 [2]湖北特种设备检验检测研究院,湖北武汉430077 [3]襄阳湖北工业大学产业研究院,湖北襄阳441100

出　　处：《传感技术学报》2023年第6期860-867,共8页Chinese Journal of Sensors and Actuators

基　　金：国家重点研发计划项目(2022YFF0605600);国家自然科学基金项目(52105550)。

摘　　要：针对压力管道内、外壁缺陷快速检测的需求,根据电磁超声/脉冲涡流复合检测原理,研究压力管道深层和表层缺陷同步检测方法。首先,利用有限元仿真软件建立电磁超声/脉冲涡流复合检测模型,研究复合式探头的检测原理;接着,研究深层及表层缺陷对电磁超声/脉冲涡流复合信号的影响规律和信号分离方法;最后,制作电磁超声/脉冲涡流复合式探头实物,并对带有深层和表层缺陷的压力管道试件进行试验测试。试验结果表明:论文研究的复合检测方法能够从管道外部有效检出压力管道外表面宽1 mm、深2 mm裂纹和管道内壁2 mm厚度减薄缺陷,弥补了两种检测技术单独使用时存在缺陷检测盲区的不足,且具有较高的检测精度。该检测方法经过进一步优化有望用于压力管道表层和深层缺陷同步快速检测。Aiming at the demand of synchronous and rapid detection of deep and surface defects of penstock,a hybrid detection method for deep and surface defects of pressure pipelines is studied based on the principle of EMAT/PECT(Electromagnetic Acoustic Transducer/Pulsed Eddy Current Testing).Firstly,the finite element simulation software is used to establish the EMAT/PECT composite testing model,and the detection principle of the composite probe is studied.Then,the influence of deep and surface defects on EMAT/PECT composite signal and the signal extraction method are studied.Finally,the EMAT/PECT composite probe is made,and the pressure pipeline with deep and surface defects is tested.The test results show that the hybrid detection method can effectively detect 1 mm⁃wide and 2 mm⁃deep cracks on the outer surface of the pressure pipe and 2 mm⁃thickness thinning defects on the inner wall of the pipe,thus eliminating the blind spot of defect detection when the two detection techniques are used alone,and has high detection accuracy.After further optimization,the proposed method is expected to be used for synchronous and rapid detection of surface and deep defects in pressure pipelines.

关 键 词：无损检测 压力管道 电磁超声/脉冲涡流 复合检测 

分 类 号：TG115.28[金属学及工艺—物理冶金]