Analysis of Nonlinear Piezoelectric Impedance Modulation Considering Asymmetry of Contact Stiffness

2019 ◽  
Vol 2019 (0) ◽  
pp. 440
Author(s):  
Yuta NISHIDA ◽  
Arata MASUDA
Keyword(s):  
Contact Stiffness ◽  
Impedance Modulation ◽  
Piezoelectric Impedance

Detection of Contact-Type Damages by Utilizing Nonlinear Piezoelectric Impedance Modulation of Self-Excited Structures

2013 ◽  
Author(s):  
Arata Masuda ◽  
Yuya Ogawa ◽  
Akira Sone
Keyword(s):  
Damage Detection ◽  
Wave Field ◽  
High Frequency ◽  
Detection Method ◽  
Piezoelectric Sensor ◽  
Frequency Wave ◽  
Contact Type ◽  
Impedance Modulation ◽  
Excited Oscillation ◽  
Piezoelectric Impedance

This paper presents an improvement of a nonlinear piezoelectric impedance modulation (NPIM)-based damage detection method, a damage-sensitive, baseline-free structural health monitoring technique proposed by the authors, by introducing self-excited oscillation. The NPIM-based damage detection utilizes the modulation of high-frequency wave field of structures caused by the contact acoustic nonlinearity at the damaged part. In this study, the high-frequency wave field is induced as a self-excited oscillation of the structure by positively feed-backing the strain signal measured by a surface-bonded piezoelectric sensor, followed by a phase-shift in 90 degrees and a nonlinear element consisting of a saturation element and a negative linear gain. The induced self-excitation can have multiple stable limit cycles at certain eigenmode frequencies, and one can switch among them by inputting an auxiliary excitation signal into the feedback loop. The current flowing through the piezoelectric sensor is measured to detect its modulation due to the stiffness fluctuation due to the existence of the contact-type damage. Experiments using a specimen with a simulated damage are conducted to examine the performance of the self-excitation circuit and its applicability to the NPIM-based damage detection method.

123 Nonlinear Piezoelectric Impedance Modulation and Its Application to Crack Monitoring

2009 ◽  
Vol 2009 (0) ◽  
pp. _123-1_-_123-6_ ◽  
Author(s):  
Arata MASUDA ◽  
Tomohiro SHINAGAWA ◽  
Junsuke AOKI ◽  
Daisuke IBA ◽  
Akira SONE
Keyword(s):  
Impedance Modulation ◽  
Crack Monitoring ◽  
Piezoelectric Impedance

Nonlinear piezoelectric impedance modulation induced by a contact-type failure and its application in crack monitoring

2011 ◽  
Vol 20 (2) ◽  
pp. 025021 ◽  
Author(s):  
Arata Masuda ◽  
Junsuke Aoki ◽  
Tomohiro Shinagawa ◽  
Daisuke Iba ◽  
Akira Sone
Keyword(s):  
Contact Type ◽  
Impedance Modulation ◽  
Crack Monitoring ◽  
Piezoelectric Impedance
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