High Resolution, high sensitivity, dynamic distributed structural monitoring using optical frequency domain reflectometry
Short Summary
Measurements of strain along a golf club shaft with down to 2mm spatial resolution and up to a 500Hz acquisition rate are used to calculate the shaft shape during swing and impact.
Abstract
OFDR is used in combination with high performance digital signal processors (DSPs) to measure distributed strain with several mm resolution and several hundred Hz rates to characterize structural dynamics. Semi-continuous FBGs or Rayleigh scatter in optical fiber form the sensor. Continuously tracking the phase change along the length of the fiber sensor enables high resolution distributed measurements that can be used to detect very small displacements, temperature changes, or strains. The distributed, high spatial resolution nature of the measurement makes the technique well-suited for detecting structural defects as well as deducing subtle structural shape changes. Measurements of strain along a golf club shaft with down to 2mm spatial resolution and up to a 500Hz acquisition rate are used to calculate the shaft shape during swing and impact
Citation
S.T. Kreger, A.K. Sang, N. Garg, J. Michel. High resolution, high sensitivity, dynamic distributed structural monitoring using optical frequency domain reflectometry. Defense Security and Sensing. 2013
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