11 January 1999 Measurement of flow-induced vibrations using a fiber Bragg grating sensor
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A fiber-optic bragg grating sensor for flow-induced vibration measurement is described. The sensor is based on monitoring shift in the Bragg wavelength of a fiber Bragg grating. the fiber Bragg grating, when bonded onto a structure, can measure local axial strain variation of the structure. The strain can be related to the structural bending displacement. Experiments were conducted to measure the flow-induced vibration of a cylinder in a crossflow. The measurement results in terms of then natural frequency of the fluid-structure system and the vortex shedding frequency are consistent with the result obtained from a laser vibrometer. Fiber Bragg grating sensors have potential applications in the study of fluid-structure interactions of cylinder arrays in a crossflow.
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Wei Jin, Wei Jin, Y. Zhou, Y. Zhou, Peter K. C. Chan, Peter K. C. Chan, H. G. Xu, H. G. Xu, } "Measurement of flow-induced vibrations using a fiber Bragg grating sensor", Proc. SPIE 3538, Process Monitoring with Optical Fibers and Harsh Environment Sensors, (11 January 1999); doi: 10.1117/12.335737; https://doi.org/10.1117/12.335737

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