A Pendulum based Optical Fiber Inclinometer with Nanoradian Resolution
In this paper, we introduce a novel extrinsic Fabry-Perot interferometer (EFPI)-based optical fiber inclinometer for tilt measurements with 0.015 μrad resolution. The reported inclinometer consists of an EFPI sensor, which is formed between endfaces of a suspended rectangular mass block and a fixed optical fiber, packaged inside a rectangular container box with an oscillation dampening device. Importantly, the two reflectors of the EFPI sensor remain parallel while the cavity length of EFPI sensor meters a change in tilt. The sensor design and the measurement principle are discussed. An experiment based on measuring the tilt angle of a simply-supported beam induced by a small load is presented to verify the resolution and accuracy of a prototype inclinometer.
Y. Zhuang and J. Huang, "A Pendulum based Optical Fiber Inclinometer with Nanoradian Resolution," Proceedings of the SPIE Smart Structures + Nondestructive Evaluation (2018, Denver, CO), SPIE, Mar 2018.
The definitive version is available at https://doi.org/10.1117/12.2296603
SPIE Smart Structures + Nondestructive Evaluation (2018: Mar. 4-8, Denver, CO)
Electrical and Computer Engineering
Intelligent Systems Center
Article - Conference proceedings
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08 Mar 2018