Temperature-Insensitive Pendulum Clinometer Using Two Fiber Bragg Gratings for 2D Tilt Angle Measurement

Author

Bao, Hualong ; Dong, Xinyong ; Zhang, Shuqin ; Zhao, Chunliu ; Chan, C.C. ; Shum, P.

Author_Institution

Inst. of Optoelectron. Technol., China Jiliang Univ., Hangzhou, China

Volume

2

fYear

2010

fDate

12-14 April 2010

Firstpage

56

Lastpage

59

Abstract

A novel two-dimensional (2D) clinometer has been demonstrated by attaching two fiber Bragg gratings (FBGs) on a deliberately designed pendulum composed of a tapered cylindrical beam and a mass. Due to the nonuniform tilt-induced strain field applied along the length of the FBGs, the bandwidths of their reflection spectra vary linearly with the applied inclination. By monitoring the reflected optical powers of the two FBGs, temperature-independent measurement of 2D tilt angle is realized. In the experiment, a high sensitivity of 1.96 Â¿w/degree over the inclination range from -4Â° to 4Â° is achieved. And the accuracy for tilt angle measurement is Â±0.125Â°.

Keywords

Bragg gratings; angular measurement; fibre optic sensors; optical fibres; reflectivity; 2D tilt angle measurement; fiber Bragg gratings; nonuniform tilt-induced strain field; reflected optical powers; reflection spectra; tapered cylindrical beam; temperature-independent measurement; temperature-insensitive pendulum clinometer; Bandwidth; Bragg gratings; Capacitive sensors; Fiber gratings; Goniometers; Joining processes; Monitoring; Optical reflection; Optical sensors; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Mobile Computing (CMC), 2010 International Conference on

Conference_Location

Shenzhen

Print_ISBN

978-1-4244-6327-5

Electronic_ISBN

978-1-4244-6328-2

Type

conf

DOI

10.1109/CMC.2010.140

Filename

5471383