Abstract：The signal of the piezoelectric layer (PZT layer) used in the structural health monitoring for aircraft structures is easily effected by radiation and crosstalk. On the principle of electromagnetic interference, the PZT layer signal is researched and some related coupling parameters are obtained. Based on the research, reasonable parameters to reduce interference were designed and a kind of anti-interference PZT layer is developed. The results of the experiments demonstrate the effectiveness of the anti-interference performance of the designed PZT layer. It can be well used for damage detection. In the same test condition, the magnitude of the crosstalk decreases to 10 percent of the original one and the SNR of a fixed frequency interference is improved by 3.16 times when the optimized piezoelectric layer was used.
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2012, Vol. 33 
