Year: 2016
Type: article
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.
Authors: Baokai Cheng, Wenge Zhu, Liwei Hua, Jie Liu, Yurong Li, Runar Nygaard, Hai Xiao
Language: English
Topic: Advanced Fiber Optic Sensors
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2396172476