[2] JOH S H J, KATHERINE M, SUNG H. Dynamic deflection of a railroad sleeper from the coupled measurements of acceleration and strain[J]. Sensors, 2018, 18(7): 2182-2182.
[3] CHAN W S, XU Y L, DING X L, et al. Assessment of dynamic measurement accuracy of GPS in three directions[J]. Journal of surveying engineering, 2006, 132(3): 108-117.
[4] PSIMOULIS P A, STIROS S C. Measuring deflections of a short-span railway bridge using a robotic total station[J]. Journal of Bridge Engineering, 2013, 18(2): 182-185.
[9] EICKHOFF W. Optical frequency domain reflectometry in single-mode fiber[J]. Appl.phys.lett, 1981, 39(9): 693-695.