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Proceedings Paper

Development of a fiber optical torquemeter
Author(s): Xiwen Wang; Yaosheng Chen
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Paper Abstract

In the paper, a fibre optical torquemeter which is suitable for on-line monitoring the turning moment of a drill turntable is researched. The meter consists of a fibre optical Mach-Zehnder Interferometer, a signal processor and a monitor. The fibre optical Mach-Zehnder Interferometer is formed with a signal and a reference optical fibre arms, two 3dB couplers, a GaAs LD and two photoelectric probers. Both the signal optical fibre arm and reference optical fibre arm are made with polarization maintaining optical fibres. The signal optical fibre arm is made with a shearing elastic tubeshaped object, and a polarization maintaining optical fibre is wound upon it. Both ends ofthe shearing elastic tube-shaped object is fixed upon an axis being measured. The shearing strain of the axis will make the size of the signal optical fibre change, and in this way the phase of the light wave in the optical fibre is modulated between the signal optical fibre arm and the reference optical fibre arm. By measuring the phase change with probers, the shearing strain of the axis is known, and the turning moment is obtained. The signal is processed by MCS-5 1 . The result is shown by the monitor. Key words: Mach-Zehnder Interferometer, Fibre Optical Torquemeter, polarization maintaining optical fibre

Paper Details

Date Published: 19 December 1996
PDF: 7 pages
Proc. SPIE 2911, Advanced Sensor and Control-System Interface, (19 December 1996); doi: 10.1117/12.262503
Show Author Affiliations
Xiwen Wang, Xi'an Petroleum Institute (China)
Yaosheng Chen, Xi'an Institute of Precision Mechanics (China)

Published in SPIE Proceedings Vol. 2911:
Advanced Sensor and Control-System Interface
Bartholomew O. Nnaji, Editor(s)

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