Zhang Tianfang, Zhou Liming, Liu Weimin, Cheng Linghao
Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510630, China.
Sensors (Basel). 2024 Dec 23;24(24):8205. doi: 10.3390/s24248205.
Real-time online monitoring of track deformation during railway construction is crucial for ensuring the safe operation of trains. However, existing monitoring technologies struggle to effectively monitor both static and dynamic events, often resulting in high false alarm rates. This paper presents a monitoring technology for track deformation during railway construction based on dynamic Brillouin optical time-domain reflectometry (Dy-BOTDR), which effectively meets requirements in the monitoring of both static and dynamic events of track deformation. Dy-BOTDR can provide a two-dimensional spatial-temporal distribution map of track strain changes to characterize various events for better monitoring accuracy and lower false alarm rates.
铁路建设过程中轨道变形的实时在线监测对于确保列车安全运行至关重要。然而，现有的监测技术难以有效监测静态和动态事件，常常导致误报率很高。本文提出了一种基于动态布里渊光时域反射仪（Dy-BOTDR）的铁路建设过程中轨道变形监测技术，该技术有效满足了轨道变形静态和动态事件监测的要求。Dy-BOTDR能够提供轨道应变变化的二维时空分布图，以表征各种事件，从而实现更高的监测精度和更低的误报率。
