Mr. Biao Xu Profile

Biao Xu

at Wuhan Univ. of Technology

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Proceedings Article | 19 December 2022 Poster + Paper

Improved SVD-SSDA on Spark for real-time subway train tracking based on ultra-weak FBG arrays

Fang Liu, Yu Xie, Biao Xu, Yu Lei, Honghai Wang

Proceedings Volume 12321, 1232119 (2022) https://doi.org/10.1117/12.2644109

KEYWORDS: Sensors, Data processing, Fiber Bragg gratings, Detection and tracking algorithms, Data modeling

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Tracking and ensuring the safety of trains is an important issue in subway operation management. Under the long-distance monitoring requirements, extracting features in real-time from large-scale stream data to track trains is a large and time-consuming task. With the support of the dynamic and distributed monitoring capabilities of ultra-weak fiber Bragg grating (UWFBG) arrays, this paper proposes a method combining the singular value decomposition (SVD) and the sequential similarity detection algorithm (SSDA) to handle the stream data to track trains in real-time. First, the vibration signal is denoised and is converted into a grayscale image using sliding window. Then, to improve the efficiency of recognition, the singular value features and the texture features are combined to build a template library for gray-scale image matching on the basis of SVD and SSDA. The details of SVD-SSDA deployment on Spark are illustrated to ensure real-time performance. Finally, the experimental results on the actual train data indicate that SVD-SSDA on Spark using ultra-weak FBG arrays can effectively identify the data stream and satisfy the requirements for real-time train tracking.

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