| 刘尧,吴斌,刘秀成,栗霞飞,林书毅,李佳明,谭树林,王鹏跃.道岔尖轨轨底缺陷的磁致伸缩导波监测实验研究*[J].,2023,42(3):558-565 |
| 道岔尖轨轨底缺陷的磁致伸缩导波监测实验研究* |
| Experimental research on magnetostrictive-based guided waves monitoring of defects at the bottom of switch rail |
| 投稿时间：2022-02-24 修订日期：2023-04-25 |
| 中文摘要: |
| 道岔尖轨在线监测是轨道智慧运维的工程技术难题之一。该文利用开发的磁致伸缩超声导波监测系统,对道岔尖轨开展了轨底缺陷监测实验。首先,分析了温度对导波监测信号特征的影响,波包能量值、传播时间均与温度呈近似正相关；其次,对比研究了基于标定方程和参考基准的两种温度补偿方法,其中参考基准法对信号的补偿效果更佳；最后,利用温度补偿后的特征波包能量值实现了缺陷尺寸逐步扩大过程的有效监测,且波包能量值随缺陷深度的变化规律可以用抛物线方程进行近似描述。上述研究结果表明磁致伸缩超声导波技术可以应用于道岔尖轨轨底缺陷的监测及定量评估。 |
| 英文摘要: |
| Online monitoring of the switch rail is one of the engineering technical problems of intelligent rail operation and maintenance. In this paper, the developed magnetostrictive-based ultrasonic guided waves monitoring system was used to carry out the defect monitoring experiments on a switch rail. First, the influence of temperature on the characteristics of the guided waves monitoring signals was analysed. The energy and the propagation time of the wave packet demonstrated approximately positive correlated with the temperature. Second, two temperature compensation methods based on the calibration equation and the reference benchmark were compared and it was found that the reference benchmark method had a better compensation effect on the signal. Finally, the curve of the characteristic wave packet’s energy after temperature compensation was used to realize the effective monitoring of the gradual enlargement process of defect. The relationship between the energy of the wave packet and the depth of the defect can be illustrated by a parabolic equation. The above research results showed that the magnetostrictive-based ultrasonic guided waves technology can be applied to the monitoring and quantitative evaluation of the defects at the bottom of the switch rail. |
| DOI：10.11684/j.issn.1000-310X.2023.03.014 |
| 中文关键词: 道岔尖轨 轨底缺陷 磁致伸缩 超声导波 监测 |
| 英文关键词: switch rail defects in rail bottom magnetostrictive guided waves monitoring |
| 基金项目:北京市自然科学基金资助项目（4192006）；北京市科技新星（Z191100001119044） |
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