含金属芯压电纤维对Lamb波传感实验研究  

Lamb Wave Sensing Using Piezoelectric Fibers with Metal Core

作　　者：常伟杰[1] 刘建[1] 季宏丽[1] 裘进浩[1] 朱孔军[1] 

机构地区：[1]南京航空航天大学智能材料与结构航空科技重点实验室,江苏南京210016

出　　处：《压电与声光》2010年第5期797-799,810,共4页Piezoelectrics & Acoustooptics

基　　金：国家"八六三"高新技术基金资助项目(2007AA03Z104);国家自然科学基金重点资助项目(50830201)

摘　　要：含金属芯压电纤维(MPF)是一种新型的压电功能元件,该文将其应用于超声Lamb波的传感。该文简述了其传感特性、研究现状,建立了一套基于MPF的兰姆(Lamb)波主动监测系统,实验研究并分析了MPF对Lamb波的传感特性。实验结果表明,MPF作为Lamb波传感器是可行的,且其对Lamb波的传感具有很强的方向性,随着Lamb波传播方向与MPF轴向夹角的增大,信号的峰值单调递减。当激励信号频率为160kHz时,沿MPF轴向激励时信号幅值约为垂直于MPF轴向时的5倍。Metal core piezoelectric fibers （MPF）,a new kind of piezoelectric device,was applied it to sense Lamb wave in this paper.The sensing characteristic and the present situation of research were firstly introduced.Secondly,experiments were carried out to calibrate the Lamb wave active monitoring system.Some results showed the feasibility for sensing ultrasonic lamb waves with MPF,and the directivity of the MPF response to Lamb was obvious.With the increase of the angle between the actuator and MPF,the amplitude of the received signal decreased.When the frequency of the input waveform was 160 kHz,the signal amplitude generating in line with MPF axis was about 5 times than that of perpendicular one.

关 键 词：压电陶瓷 纤维 金属芯 结构健康监测 兰姆(Lamb)波 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TB552[自动化与计算机技术—控制科学与工程]