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Indexed by:期刊论文

Date of Publication:2017-11-01

Journal:SMART MATERIALS AND STRUCTURES

Included Journals:Scopus、SCIE、EI

Volume:26

Issue:11

ISSN No.:0964-1726

Key Words:attitude; fiber-optic; evanescent field; fiber Bragg grating

Abstract:We proposed a new approach to attitude measurement by an evanescent field-based optical fiber sensing device and demonstrated a liquid pendulum. The device consisted of three fiber-optic evanescent-filed sensors which were fabricated by tapered single mode fibers and immersed in liquid. Three fiber Bragg gratings were used to measure the changes in evanescent field. And their reflection peaks were monitored in real time as measurement signals. Because every set of reflection responses corresponded to a unique attitude, the attitude of the device could be measured by the three fiber-optic evanescent-filed sensors. After theoretical analysis, computerized simulation and experimental verification, regular responses were obtained using this device for attitude measurement. The measurement ranges of dihedral angle and direction angle were 0 degrees-50 degrees and 0 degrees-360 degrees. The device is based on cost-effective power-referenced scheme. It can be used in electromagnetic or nuclear radiation environment.