钢轨轨头浅表面缺陷的空气耦合超声导波检测  

Air Coupled Ultrasonic Guided Wave Detection of Shallow Surface Defects of Rail Head

作　　者：常俊杰[1,2] 李媛媛 李光亚 CHANG Junjie1,2,LI Yuanyuan1,LI Guangya3(1.Key Laboratory of Nondestructive Testing Technology of Ministry of Education, Nanchang H angkong University, Nanchang 330063, China;2.Japan Probe Co., Ltd., Yokohama 2320033, Japan; 3.School of Information and Communication Engineering, North University of China, Taiyuan 030051, Chin)

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,南昌330063 [2]日本探头株式会社,横滨2320033 [3]中北大学信息与通信工程学院,太原030051

出　　处：《无损检测》2018年第3期14-18,共5页Nondestructive Testing

基　　金：国家自然科学基金资助项目(11464030);山西省青年科学基金资助项目(2015021086)

摘　　要：针对常规检测方法如压电超声、涡流、漏磁及机器视觉等表面检测方法均无法对钢轨轨头浅表面缺陷进行检测的问题,采用空气耦合超声类瑞利波检测方法,利用回波信号在不同频率、不同缺陷深度下幅值的变化来评估钢轨轨头的浅表面缺陷。通过对空气耦合超声导波检测过程的仿真和试验,证明了该检测方法的可行性和可靠性。Due to some shortcomings,the usual piezoelectric ultrasonic,eddy current,magnetic flux leakage,machine vision and other surface inspection methods cannot meet the rail head shallow surface defects detection requirements.In this paper,the air-coupled ultrasonic Rayleigh like wave detection method is used to evaluate the shallow surface defects of the rail head by using the change of the amplitude of the echo signal at different frequencies and different defect depths.Through the simulation and experimental research on the air coupled ultrasonic guided wave detection process,the feasibility and reliability of the detection are proved.

关 键 词：空气耦合超声导波 类瑞利波 浅表面缺陷检测 钢轨轨头 

分 类 号：TG115.28[金属学及工艺—物理冶金]