[1] [1] ZHANG Sh C. Research review of speed measurement and positioning method suitable for maglev trains［J］. Railway Standard Design,2018, 62(10):186-191(in Chinese).

[2] [2] ZHANG M X. Research on the operation control system of medium and low speed maglevtrains［D］.Chengdu:South West Jiaotong University, 2019: 24-56(in Chinese).

[3] [3] GUI X, LI Zh Y, WANG H H, et al. Review of distributed sensing technology and application based on large scale grating array fiber［J］. Journal of Applied Science, 2021, 39(5): 747-776 (in Chin-ese).

[4] [4] LIU H L, ZHU Zh W, ZHENG Y, et al. Experimental study on an FBG strain sensor［J］. Optical Fiber Technology, 2018, 40: 144-151.

[5] [5] ZHANG D P, LONG Zh Q, XUE S, et al. Optimal design of the absolute positioning sensor for a high speed maglev train and research on its fault diagnosis［J］. Sensors, 2012, 12(12): 10621-10638.

[6] [6] LUO G B. Research on signal processing technology of high-speed maglev positioning and speed measurement system［D］. Changsha:National University of Defense Technology, 2017:47-106(in Chin-ese).

[7] [7] ZHU D F,WANG Y J,YANG Y, et al. Location and speed measurement method of urban rail train based on grating array ［J］. Acta Photonica Sinica, 2019, 48(11): 1148014(in Chinese).

[8] [8] WANG G, ZHANG M J, HUANG M G, et al. Research on load sensing system based on orthogonal fiber Bragg grating array［J］. Laser Technology, 2021, 45(2): 143-146 (in Chinese).

[9] [9] LOUPOS K, AMDITIS A. Structural health monitoring fiber optic sensors［M］. New York,USA: Springer, 2017: 32-45.

[10] [10] FILOGRANO M L, GUILLEN P C, RODRIGUEZBARRIOS A, et al. Real-time monitoring of railway traffic using fiber Bragg grating sensors［J］. IEEE Sensors Journal, 2012, 12(1): 85-92.

[11] [11] WU Q F. Application research of train fiber Bragg grating monitoring system［D］. Beijing: Beijing Jiaotong University,2015:13-78(in Chinese).

[12] [12] QI X Sh, REN Zh G, LIU J Y, et al. Research on the influence of laser rust removal technology on the performance of collector rings of high-speed trains［J］. Laser Technology, 2019, 43(2): 168-173(in Chinese).

[13] [13] YANG G, WANG Z Ch, YI L F, et al. A high-speed maglev train positioning system based on OFDR ［J］. Communication and Information Technology, 2020(5): 72-85(in Chinese).

[14] [14] DONG B, HE Sh Y, HU Sh Y, et al. Research on multiplexed sensing system based on tunable laser［J］. Laser Technology, 2005,29(6): 608-610(in Chinese).

[15] [15] LIU F, TONG X L, ZHANG C, et al. Multi-peak detection algorithm based on the Hilbert transform for optical FBG sensing［J］. Optical Fiber Technology, 2018, 45: 47-52.

[16] [16] WANG M Y, SHENG L, KONG Y, et al. Research on the effect of laser linewidth on the performance of φ-OTDR system［J］. Laser Technology, 2016, 40(4): 615-618(in Chinese).

[17] [17] KOUROUSSIS G, KINET D, MOEYAERT, et al. Railway structure monitoring solutions using fibre Bragg grating sensors［J］. International Journal of Rail Transportation, 2016, 4(3): 135-150.

[18] [18] HE Zh X, ZHANG Zh Y, LI L, et al. A novel fiber Bragg grating vibration sensor with double equal-strength cantilever beams［J］. Optoelectronics Letters, 2021,17(6):321-327.

[19] [19] ZHANG Y J, XIE X P, BI W H. High-speed and high-multiplexing distributed temperature sensing network based on weak grating［J］. Chinese Journal of Lasers, 2013, 40(4): 0405006(in Chinese).

[20] [20] WANG Z. Research on information processing technology of quasi-distributed sensing system based on weak reflection fiber Bragg grating［D］. Wuhan: Huazhong University of Science and Technology,2011:67-145(in Chinese).