Distributed Torsion Sensor Based on Cascaded Coaxial Cable Fabry-Perot Interferometers

Abstract

Cascaded coaxial cable Fabry-Perot interferometers (FPI) are studied and demonstrated for distributed torsion measurement. Multiple weak reflectors are implemented on a coaxial cable so that any two consecutive reflectors can form a Fabry-Perot cavity. By fixing the cable sensor in a helical form on a shaft, the distributed torsion of the shaft can be measured by the cascaded Fabry-Perot cavities. A test on a single section shows that the sensor has a linear response with a sensitivity of 1.834 MHz (rad/m)-1 in the range of twisted rate from 0 to 8.726 rad m-1. The distributed torsion sensing capability is useful in drilling process monitoring, structure health monitoring and machine failure detection.

Department(s)

Geosciences and Geological and Petroleum Engineering

Second Department

Electrical and Computer Engineering

Keywords and Phrases

Coaxial Cable; Distributed Sensor; Torsion Sensor; Cavity Resonators; Interferometers; Process Monitoring; Reflection; Structural Health Monitoring; Torsional Stress; Drilling Process; Fabry-Perot Cavity; Linear Response; Machine Failure; Torsion Measurement

International Standard Serial Number (ISSN)

0957-0233

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2016 Institute of Physics Publishing, All rights reserved.

Publication Date

01 May 2016

Link to Full Text

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