An Experimental Study on the Effect of Temperature on Piezoelectric Sensors for Impedance-Based Structural Health Monitoring

Sensors

Fabricio G. Baptista¹  Danilo E. Budoya²  Vinicius A. D. de Almeida² 

[1] Faculdade de Engenharia, UNESP-Univ Estadual Paulista, Campus de Bauru, Departamento de Engenharia Elétrica, Av. Eng. Luiz Edmundo Carrijo Coube, 14-01, Bauru-SP 17033-360, Brazil;

关键词: piezoelectric sensors;    PZT;    structural health monitoring;    SHM;    electromechanical impedance;    EMI;    temperature;   

DOI  :  10.3390/s140101208

来源: mdpi

【 摘 要 】

The electromechanical impedance (EMI) technique is considered to be one of the most promising methods for developing structural health monitoring (SHM) systems. This technique is simple to implement and uses small and inexpensive piezoelectric sensors. However, practical problems have hindered its application to real-world structures, and temperature effects have been cited in the literature as critical problems. In this paper, we present an experimental study of the effect of temperature on the electrical impedance of the piezoelectric sensors used in the EMI technique. We used 5H PZT (lead zirconate titanate) ceramic sensors, which are commonly used in the EMI technique. The experimental results showed that the temperature effects were strongly frequency-dependent, which may motivate future research in the SHM field.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.