Lasers, Fiber Optics, and Communications

Development of a robust rotational-angle optical fiber sensor using different-material cantilevers

[+] Author Affiliations
Hai-Tao Sun, Hao-Jan Sheng, Wen-Fung Liu

Feng-Chia University, Department of Electrical Engineering, Taichung, No. 100, Wenhwa Road, Seatwen, Taichung, Taiwan 40724, China

Opt. Eng. 54(2), 026104 (Feb 17, 2015). doi:10.1117/1.OE.54.2.026104
History: Received September 28, 2014; Accepted January 21, 2015
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Abstract.  A rotational-angle sensor composed of two Fiber Bragg gratings glued axially on a cylindrical cantilever beam to be bent by the resultant repulsion force of three magnets is designed and proposed for detecting the rotary random position of a rotor. By means of using three different materials on cantilever beams for checking each feature’s effect on this fiber optic sensor, it has been experimentally confirmed that a nearly identical performance is achieved among them. From these experimental results, a maximum deviation of 1.3 deg is obtained and it is in good agreement with the theoretical prediction. As a whole, the cantilever design exploited in this proposed optical fiber sensor configuration is independent of the intrinsic materials used. This sensor can provide a robust kind of technique for accurately measuring the rotational angle or rotational rate of a rotor in an arbitrary rotational direction for a wide range of industrial applications.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Hai-Tao Sun ; Hao-Jan Sheng and Wen-Fung Liu
"Development of a robust rotational-angle optical fiber sensor using different-material cantilevers", Opt. Eng. 54(2), 026104 (Feb 17, 2015). ; http://dx.doi.org/10.1117/1.OE.54.2.026104


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