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《Journal of Jiangsu University(Natural Science Edition)》 2006-02
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Novel SHM technique based on OPCM AE sensors

LIU Qiong-hua,LUO Ying,ZHU Bu-yin,ZHU Jian-guo(Faculty of Science,Jiangsu University,Zhenjiang,Jiangsu 212013,China)  
By combining the reflection seismic method with orthotropic piezoelectric composite material(OPCM) acoustic emission(AE) sensor character,a novel SHM technique in civil engineering is proposed.Based on the theory of micro mechanics,OPCM AE sensor's orthotropic character is analyzed.Instead of the single piezoelectric ceramic transducer,the OPCM transducers made by ourselves are also applied.With the OPCM units,the interference of the echo signal which comes from the concrete structures profile are avoided.Combined with the ellipse damage location,the damage location can be ascertained.By utilizing PZT units and OPCM units respectively in the experiment,it is proved that the novel SHM technique is feasible in SHM system.Meanwhile,the ability of OPCM units against the profile echo signal is demonstrated.
【Fund】: 国家自然科学基金资助项目(50375069);; 江苏省青蓝工程项目;; 江苏省“六大人才高峰”计划项目
【CateGory Index】: TU317.6
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