摘要
现有轨道交通定位和测速方法易受到外界环境干扰,具有不稳定性。为了解决这些难题,结合光纤光栅绝缘、抗干扰能力强、耐腐蚀等特性,提出了一种基于弱光栅阵列的结合波分和光时域反射仪技术的高精度列车测速定位系统方案,通过密集型复用方式实现光栅点的绝对定位需求,并设计了根据不同光栅分区定位结果及其波长漂移规律来计算实时速度和位置的数据处理方法。为验证系统性能,搭建了模拟运行环境,进行了理论分析和实验验证。结果表明,该方案能实现厘米级的定位精度和1 km/h的测速精度。该研究在轨道交通方面具有广泛的应用前景。
The existing rail transit location and speed measurement method is easy to be interfered by the external environment and has instability. In order to solve these problems, based on the fiber grating with the characteristics of insulation, strong anti-interference, and corrosion resistance, a high precision train speed measurement and location system based on weak grating array combined with wave division and optical time-domain reflectometer(OTDR) technology was proposed. The absolute location requirement of grating points was realized by intensive multiplexing, and a data processing method was designed to calculate real-time speed and position according to the location results of different grating partitions and their wavelength drift rules. In order to verify the performance of the system, a simulated operating environment was built. And theoretical analysis and experimental verification were carried out. Experimental results show that centimeter-level positioning accuracy and 1 km/h speed measurement accuracy can be achieved with the proposed scheme, which has a wide application prospect in rail transit.
作者
王沁宇
童杏林
张翠
邓承伟
魏敬闯
许思宇
张博
刘先恺
WANG Qinyu;TONG Xinglin;ZHANG Cui;DENG Chengwei;WEI Jingchuang;XU Siyu;ZHANG Bo;LIU Xiankai(School of Information Engineering,Wuhan University of Technology,Wuhan 430070,China;National Engineering Laboratory of Optical Fiber Sensing Technology,Wuhan University of Technology,Wuhan 430070,China;Qingdao Sifang Rolling Stock Co.Ltd.,China Railway Rolling Stock Corporation Limited,Qingdao 266000,China)
出处
《激光技术》
CAS
CSCD
北大核心
2023年第1期46-51,共6页
Laser Technology
关键词
光纤光学
传感器技术
准分布式测量
列车测速定位
布喇格光栅
fiber optics
sensor technique
quasi-distributed measurement
train speed measurement and positioning
Bragg grating
