Distributed Torsion Sensor Based on Cascaded Coaxial Cable Fabry-Perot Interferometers
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.
B. Cheng et al., "Distributed Torsion Sensor Based on Cascaded Coaxial Cable Fabry-Perot Interferometers," Measurement Science and Technology, vol. 27, no. 7, Institute of Physics Publishing, May 2016.
The definitive version is available at https://doi.org/10.1088/0957-0233/27/7/075103
Geosciences and Geological and Petroleum Engineering
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)
Article - Journal
© 2016 Institute of Physics Publishing, All rights reserved.