Abstract
An overview of recent advances in electromechanical impedance- (EMI-) based structural health monitoring is presented in this paper. The basic principle of the EMI method is to use high-frequency excitation to sense the local area of a structure. Changes in impedance indicate changes in the structure, which in turn indicate that damages appear. An accurate EMI model based on the method of reverberation-ray matrix is introduced to correlate changes in the signatures to physical parameters of structures for damage detection. Comparison with other numerical results and experimental data validates the present model. A brief remark of the feasibility of implementing the EMI method is considered and the effects of some physical parameters on EMI technique are also discussed.
Funding Information
  • National Natural Science Foundation of China (10725210, 2009CB623200, Y107796, 2008A610101, 2009A610148)
  • National Basic Research Program of China (10725210, 2009CB623200, Y107796, 2008A610101, 2009A610148)
  • Zhejiang Provincial Natural Science Foundation of China (10725210, 2009CB623200, Y107796, 2008A610101, 2009A610148)
  • Ningbo Natural Science Foundation of China (10725210, 2009CB623200, Y107796, 2008A610101, 2009A610148)
  • Ningbo Natural Science Foundation of China (10725210, 2009CB623200, Y107796, 2008A610101, 2009A610148)

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