DocumentCode :
45804
Title :
Piezoelectric Transducers Assessed by the Pencil Lead Break for Impedance-Based Structural Health Monitoring
Author :
Dare de Almeida, Vinicius Augusto ; Guimaraes Baptista, Fabricio ; de Aguiar, Paulo Roberto
Author_Institution :
Dept. de Eng. Eletr., UNESP-Univ. Estadual Paulista, Bauru, Brazil
Volume :
15
Issue :
2
fYear :
2015
fDate :
Feb. 2015
Firstpage :
693
Lastpage :
702
Abstract :
The pencil lead break (PLB) is a well-known method for characterizing acoustic emission sensors. In this paper, we analyze the effectiveness of this method in characterizing piezoelectric transducers for structural health monitoring (SHM) systems based on the electromechanical impedance (EMI) technique. Tests were carried out on aluminum beams of different sizes, and two types of transducers were considered: lead zirconate titanate ceramics and macrofiber composite devices. The experimental results indicate a clear relationship between the variation in the electrical impedance signature of the transducer and power spectral density obtained with the PLB method. Therefore, the PLB can be a simple and effective method for assessing the sensitivity of transducers for damage detection in SHM systems based on the EMI technique.
Keywords :
beams (structures); condition monitoring; electric impedance measurement; electromechanical effects; fibre reinforced composites; lead compounds; mechanical testing; piezoceramics; piezoelectric transducers; structural engineering; EMI technique; PLB method; PZT; SHM system; acoustic emission sensor; aluminum beam testing; electrical impedance signature; electromechanical impedance technique; lead zirconate titanate ceramics; macrofiber composite device; pencil lead break method; piezoelectric transducer; power spectral density; structural health monitoring system; Electromagnetic interference; Impedance; Monitoring; Piezoelectric transducers; Sensitivity; Sensors; EMI; PLB; SHM; electromechanical; impedance; piezoelectric transducers; structural health monitoring;
fLanguage :
English
Journal_Title :
Sensors Journal, IEEE
Publisher :
ieee
ISSN :
1530-437X
Type :
jour
DOI :
10.1109/JSEN.2014.2352171
Filename :
6883145
Link To Document :
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