光纤光栅传感技术在轨道交通轨道占用检查中应用研究

Application Research of Fiber Bragg Grating Sensing Technology in Rail Transit Track Occupancy Detection

轨道占用检查装置是轨道交通信号系统关键基础设备。针对目前轨道电路、计轴设备易遭受电磁干扰等缺点,提出一种基于光纤光栅传感技术的轨道占用检查方案。通过现场试验,该方案可以通过FBG传感器的反射中心波长变化,准确的区分轨道是否被列车占用,为轨道交通轨道的占用检查装置发展提供一种新的方向。

The track occupancy detection device is the key basic equipment of rail transit signal system.Aiming at the shortcomings that track circuit and axle-counting equipment are vulnerable to electromagnetic interference,a scheme of track occupation detection based on fi ber bragg grating sensing technology is proposed.Through on-site test,the scheme can accurately distinguish whether the track is occupied by trains by the wavelength change of reflection center of FBG sensor,and provide a new direction for the development of the occupation detection device of rail transit.