Analysis of Sensor Installation Methods in Impedance-based SHM Applications
详细信息 查看全文
- 作者：Ricardo Z.M. da Silveira ; Leandro M. Campeiro ; Fabricio G. Baptista ; fabriciogb@feb.unesp.br
- 关键词：piezoelectric transducers ; SHM ; impedance ; installation ; coupling
- 刊名：Procedia Engineering
- 出版年：2016
- 出版时间：2016
- 年：2016
- 卷：168
- 期：Complete
- 页码：1751-1754
- 全文大小：378 K
- 卷排序：168
文摘
In recent years, piezoelectric sensors have been used in many non-destructive methods for detection of structural damage in structural health monitoring (SHM) systems, including the electromechanical impedance (EMI) technique. The classic method to install the sensor in the structure to be monitored is using a high stiffness adhesive. However, many studies have proposed alternative methods of sensor installation. Thus, the purpose of this study is to conduct a comparative experimental analysis of the main installation methods of the sensors in the electromechanical impedance technique, which are the direct installation, the magnetic coupling, and using aluminum foils. Tests with the three installation methods were carried out on aluminum structures and the results were compared using the electrical impedance signatures and damage indices. The experimental results indicate important features of each method relative to the feasibility for detection of structural damage.