Paper Title:
Wireless Strain Monitoring of CFRP Laminates Using Electric Resistance Change with Oscillating Circuit
  Abstract

To identify a delamination crack in a CFRP laminate wirelessly, we proposed an electric resistance change method with oscillating circuit in the previous study. Although the method detects the delamination creation, it cannot monitor condition of applied strain before delamination creation because the electric resistance change due to strain changing is quite small. In the present study, a bridge circuit, two amplifiers and voltage-controlled oscillator are added to sensing circuit so that it can monitor very little change of the electric resistance change. Using proposed strain sensing system, the electric resistance change and oscillating frequency change due to strain changing are experimentally measured. As a result, the method is found to successfully monitor the applied strain.

  Info
Periodical
Key Engineering Materials (Volumes 326-328)
Edited by
Soon-Bok Lee and Yun-Jae Kim
Pages
1415-1418
DOI
10.4028/www.scientific.net/KEM.326-328.1415
Citation
R. Matsuzaki, A. Todoroki, "Wireless Strain Monitoring of CFRP Laminates Using Electric Resistance Change with Oscillating Circuit", Key Engineering Materials, Vols. 326-328, pp. 1415-1418, 2006
Online since
December 2006
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Price
$32.00
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