红外与激光工程, 2017, 46 (1): 0106006, 网络出版: 2017-03-29   

基于激光超声方法的钢轨缺陷检测

Rail steel flaw inspection based on laser ultrasonic method
作者单位
山东省科学院激光研究所无损检测平台, 山东 济南 250103
摘要
针对钢轨探伤可靠性试验及缺陷信号采集处理要求, 建立了一套基于激光超声技术的无损检测系统。该系统主要包括高能量脉冲激光器、电磁超声换能器、嵌入式信号采集处理系统以及带有人工缺陷裂缝的P60钢轨试件。在分析利用瑞利波探伤机理的基础上, 重点研究了激励线圈阻抗匹配方法, 介绍了嵌入式信号采集处理系统工作原理及其信号处理过程。最后利用搭建的激光超声检测系统, 实现钢轨表面深度不少于0.5 mm缺陷的定位, 并给出了接收信号幅度与提离距离以及缺陷尺寸的关系。
Abstract
To meet reliability of rail steel flaw inspection and signal acquisition, a nondestructive testing (NDT) system based on laser ultrasonic technique(LUT) was established. The system was mainly composed of high energy pulse laser, electromagnetic ultrasonic transducer (EMAT), embedded data acquisition system and P60 rail specimens with artificial cracks. Based on analysis of Rayleigh wave detection principle, this paper focuses on impedance matching method of EMAT probe coil. Besides, working flow path and signal processing of embedded signal acquisition system were introduced. Moreover, system based LUT was used to locate the rail steel surface crack with depth no less than 0.5 mm. Finally, relationship between EMAT probe lift-off distance and signal amplitude was given.

南钢洋, 王启武, 张振振, 郭锐, 宋江峰, 孙继华. 基于激光超声方法的钢轨缺陷检测[J]. 红外与激光工程, 2017, 46(1): 0106006. Nan Gangyang, Wang Qiwu, Zhang Zhenzhen, Guo Rui, Song Jiangfeng, Sun Jihua. Rail steel flaw inspection based on laser ultrasonic method[J]. Infrared and Laser Engineering, 2017, 46(1): 0106006.

本文已被 2 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!