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.
［1］袁慎芳. 结构健康监控［M］. 北京: 国防工业出版社, 2007,206-212.
［2］Staszewski W J, Boller C, Tomlinson G. Health monitoring of aerospace structures:smart sensor technologies and signal processing［M］. Munich, Germany: Formerly with European Aeronautic Defence and Space Company-EADS, 2004, 1-18.
［3］Mark L, Qing X P, Kumar A, et al. Smart Layer and Smart Suitcase for Structural Health Monitoring Applications ［C］// Proceeding of SPIE. Smart Structures and Materials 2001, Newport Beach, CA, USA, 2001, 98-106.
［4］Qing X P, Beard S J, Kumar A, et al. Advances in the development of built-in diagnostic system for filament wound composite structures［J］. Composites science and technology, 2006, 66(11-12): 1694-1702.
［5］Mark L, Kumar A, Qing X P, et al. Advances in Utilization of Structrally Intergrated Sensor Networks for Health Monitoring in Commercial Applications［C］//Proceeding of SPIE. Smart Structures and Materials 2002: Smart Structures and Integrated Systems,San Diego, CA, USA, 2002,4701:167-176.
［6］王强, 袁慎芳. 航空结构健康监测的压电夹层设计［J］. 传感器与微系统, 2008, 27(7): 72-74.
［7］Qiu L,Yuan S F. Low Crosstalk Switch Unit for Dense Piezoelectric Sensor Networks［J］. Frontiers of Mechanical Engineering in China, 2009, 4(4): 401-406.
［8］杨克俊. 电磁也兼容原理与设计技术［M］. 北京:人民邮电出版社, 2004:171-187.
［9］Williams T. EMC for Product Designers［M］. 北京: 电子工业出版社, 2008: 185-208.
［10］杨盛祥, 马晓庆, 高秋来, 等. 高频磁场标准的研制［J］. 计量学报,1994,15(3):161-166.
［11］Qiu L, Yuan S F. On development of a multi-channel PZT array scanning system and it s evaluating application on UAV wing box ［J］. Sensors and Actuators: Physical , 2009, 151 (2): 220-230.
［12］邱雷, 袁慎芳, 张逍越,等. 基于Shannon 复数小波的复合材料结构时间反转聚焦多损伤成像方法［J］. 复合材料学报, 2010, 27(2): 101-107.
2012, Vol. 33 
