[1] [1] DUAN Zh B, CAO X D, HU F Y,et al. A method for constructing health indicators of the engine bleed air system using multi-level feature extraction[J]. Aerospace, 2023, 10(7): 645.

[4] [4] WANG Q Y, TONG X L, ZHANG C,et al. Optical fiber FBG linear sensing systems for the on-line monitoring of airborne high temperature air duct leakage[J]. Chinese Physics, 2022, B31(8): 410-417.

[5] [5] DU J Y, LI X B, PU T F,et al. Effect of anode area on the sensing mechanism of vertical GaN Schottky barrier diode temperature sensor[J]. Chinese Physics, 2022, B31(4): 047701.

[6] [6] KORLAPATI N V S, KHAN F, NOOR Q,et al. Review and analysis of pipeline leak detection methods[J]. Journal of Pipeline Science and Engineering, 2023, 42(1): 100074.

[7] [7] MERIBOUT M, KHEZZAR L, AZZI A,et al. Leak detection systems in oil and gas fields: Present trends and future prospects[J]. Flow Measurement and Instrumentation, 2020, 75: 101772.

[8] [8] SOUSA I, PEREIRA L, MESQUITA E,et al. Sensing system based on FBG for corrosion monitoring in metallic structures[J]. Sensors, 2022, 22(16): 5947.

[10] [10] MUGGLETON J M, HUNT R, RUSTIGHI E,et al. Gas pipeline leak noise measurements using optical fibre distributed acoustic sensing[J]. Journal of Natural Gas Science and Engineering, 2020, 78: 103293.

[11] [11] HOU Q, JIAO W, REN L,et al. Experimental study of leakage detection of natural gas pipeline using FBG based strain sensor and least square support vector machine[J]. Journal of Loss Prevention in the Process Industries, 2014, 32: 144-151.

[13] [13] NIZAR S M, CAROLINE B E. Comparison of fiber optic sensors based on FBG—A review[C]//2019 IEEE International Conference on System, Computation, Automation and Networking (ICSCAN). New York, USA: IEEE Press, 2019: 1-6.

[15] [15] LI H, WANG J Y, CAI J X,et al. Substrate-type sensitized FBG temperature sensor[J]. Sensor Review, 2023, 42(2): 83-91.

[17] [17] LIU H, ZHOU C, PANG Y,et al. High-resolution optical fiber temperature sensor based on draw tower grating array[J]. Sensors, 2022, 22(8): 2846.

[18] [18] GEBREGIORGIS Y, CHANDRAN S, PAPADOVASILAKIS M,et al. Straight and curved distributed Bragg reflector design for compact WDM filters[J]. Optics Express, 2023, 31(7): 485609.