| 摘要 |
A method useful in structural health monitoring (SHM) systems for detecting damages in metal structures includes extracting the zero-order symmetric and anti-symmetric mode signal components from each of a plurality of current sensor signals of an array of transducers mounted on the structure, matching the extracted signal components with corresponding signal components of a plurality of baseline sensor signals previously detected in the structure, computing respective indices I<SUB>S0 </SUB>and I<SUB>A0 </SUB>for each of the matched extracted current and baseline signal components based on respective signal energies thereof, and determining the presence of a damage in the structure if either of the indices I<SUB>S0 </SUB>and I<SUB>A0 </SUB>of a plurality of neighboring sensor paths of the structure is greater than a selected threshold value.
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