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Proceedings Paper

Time domain reflectometry as a distributed strain sensor
Author(s): Myung-Keun Yoon; Daniel F. Dolan; Steve Gabriel
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Paper Abstract

Existing strain gages are mostly point sensors that measure local strains from a few discrete locations, while TDR sensor can interrogate distributed changes along the entire length of the sensor line. The present study investigates feasible applications of a new technique using TDR as a distributed strain sensor for structural health monitoring. First, a specially designed TDR sensor laid out on a substrate successfully measured distributed strains and detected a failure location when the substrate was under an increasing tensile load. Second, a TDR sensor spirally wound around a cylindrical tank measured a circumferential strain and detected a failure location on the tank surface when the tank was increasingly pressurized. The developed TDR monitoring technique shows great potential for real-time health monitoring of various critical structures such as bridge, aircraft, and aerospace applications.

Paper Details

Date Published: 8 April 2008
PDF: 11 pages
Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 69321R (8 April 2008); doi: 10.1117/12.776224
Show Author Affiliations
Myung-Keun Yoon, South Dakota School of Mines and Technology (United States)
Daniel F. Dolan, South Dakota School of Mines and Technology (United States)
Steve Gabriel, Spearfish High School (United States)


Published in SPIE Proceedings Vol. 6932:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008
Masayoshi Tomizuka, Editor(s)

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