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高寒地区高速铁路路基冻胀远程监测
作者:朱力强1 2 闻志强1 邬成健1 王尧1 2 
单位:1.北京交通大学机械与电子控制工程学院,北京100044;2.北京交通大学载运工具先进制造与测控技术教育部重点实验室,北京100044
关键词:路基冻胀 位移敏感元件(PSD) 光照补偿 温度特性 
分类号:
出版年·卷·期(页码):2019·41·第1期(109-116)
摘要:

为准确监测高寒地区高速铁路路基冻胀情况,设计基于棱镜反射原理的高速铁路路基冻胀远程监测系统。考虑到现场环境光线变化对系统检测精度的影响,提出位移敏感元件(PSD)背景光补偿算法,对比试验表明补偿算法能够提高系统的测量精度,强背景光下效果尤其明显。针对环境温度变化对系统检狗万要实名制测精度的影响,对系统机构进行优化设计,温度特性试验表明系统处于高寒环境下时对测量精度的影响非常微小。整个系统在哈齐高速铁路进行了为期3个月的冬季现场监测,系统运行稳定可靠,测量点路基冻胀值最大约为2 mm

In order to accurately monitor the frost heave of high-speed railway subgrade in alpine region,a remote monitoring system for frost heave of high-speed railway subgrade based on prism reflection principle was proposed.To mitigate the effect of ambient light changes on the detection precision of the system,a background light compensation algorithm was proposed for position sensitive detector(PSD).The contrast experiment shows that the compensation algorithm can improve the measurement accuracy of the system,especially in the case of the strong background light.The system was also optimized to reduce the influence of the changes of ambient temperature on the detection precision.The temperature characteristic test shows that the temperature has a minor influence on the measurement precision when the system is in cold environment.The whole system runs stably and reliably during the three months’winter field monitoring on Harbin-Qiqihaer High-speed Railway.The maximum frost heave value of the roadbed at the measuring points is about 2 mm.

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