摘要
对经防水处理后的PZT(piezoelectric ceramic)阻抗传感器开展了封装试验研究.为了保证PZT传感器与混凝土结构的相容性,试验采用水泥作为封装材料,提出了一套PZT阻抗传感器的封装工艺.通过对封装前后PZT导纳(阻抗的倒数)进行测试可以发现:在水泥封装层固化期间,PZT导纳曲线向右发生漂移,峰值对应共振频率增大;经水泥封装的PZT阻抗传感器在封装层完全固化后导纳曲线几乎不再随时间变化,表明封装后的PZT传感器性能稳定,可用于实际混凝土结构的在线健康监测.
The encapsulation of waterproofed PZT patches was studied experimentally,in which cement was use as the encapsulation material of PZT transducer in order to ensure the compatibility between encapsulated PZT transducer and concrete.And an encapsulation technology was also proposed.The PZT admittances （inverse of impedance） were measured before and after the PZT transducers were encapsulated,and it can be found that the PZT admittance curves shift tow ard the right and the resonant frequencies corresponding to peak values increase during the solidification of cement encapsulation layer,and after the cement encapsulation layer was fully solidified the PZT admittance curves of the encapsulated transducers would remain unchanged with time.It indicates that the encapsulated PZT impedance transducers are stable,and can be use to monitor the health of the concrete structures.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第4期113-116,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50778077
50925828)
高等学校博士学科点专项科研基金资助项目(20070487099)
关键词
水泥
压电陶瓷
埋入式压电阻抗传感器
封装
压电导纳
健康监测
cement
PZT （piezoelectric ceramic）
embedded piezoelectric impedance transducer
encapsulation
piezoelectric admittance
health monitoring
