Monitoring the dynamic displacements of railway track
Monitoring the dynamic displacements of railway track
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DOI：
10.1243/0954409jrrt51
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发表时间：
2007-03-01
影响因子：
2
通讯作者：
Richards, D. J.
中科院分区：
文献类型：
--
作者：
Bowness, D.;Lock, A. C.;Richards, D. J.
本文报道了两个独立的，创新的技术测量轨道位移的发展和测试。一个系统结合了远程视频监控和粒子图像测速，使用网络摄像头和一个小型望远镜。第二种方法使用安装在枕木上的地震检波器，该检波器提供与运动速度成比例的电压输出，该电压输出可以被滤波和积分以计算位移。实验室验证测试表明，视频监控系统可以测量峰到峰位移，从15米的距离为0.04毫米以内的频率小于4赫兹。对于低至1 Hz的频率，地震检波器测量的峰间位移在0.07 mm以内。来自三种不同标准的铁路轨道和/或列车速度的数据被用来探索和量化每个系统在该领域的局限性。
This paper reports the development and testing of two independent, innovative techniques for measuring rail displacements. One system combines remote video monitoring with particle image velocimetry, using a webcam and a small telescope. The second uses sleeper mounted geophones that give a voltage output proportional to the velocity of motion, which can be filtered and integrated to calculate displacements. Laboratory validation tests show that the video monitoring system can measure peak-to-peak displacements to within 0.04 mm from a distance of 15 m for frequencies less than 4 Hz. The geophones measure peak-to-peak displacements to within 0.07 mm for frequencies as low as 1 Hz. Data from three different standards of railway track and/or train speeds are used to explore and quantify the limitations of each system in the field.