Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Sensitivity Enhancement of Piezoelectric Transducers for Impedance-Based Damage Detection via a Negative Capacitance Interface

Full text
Author(s):
Budoya, Danilo Ecidir [1] ; Campeiro, Leandro Melo [1] ; Baptista, Fabricio Guimaraes [1]
Total Authors: 3
Affiliation:
[1] Sao Paulo State Univ UNESP, Sch Engn, Dept Elect Engn, Lab Transducers & Data Acquisit, BR-17033360 Bauru, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: IEEE SENSORS JOURNAL; v. 20, n. 23, p. 13892-13900, DEC 1 2020.
Web of Science Citations: 2
Abstract

Piezoelectric transducers are used in many applications due to electromechanical coupling, which allows mechanical and electrical quantities to be related. This principle is used in the development of structural damage detection techniques such as electromechanical impedance (EMI) commonly used in structural health monitoring (SHM), where structural health is monitored by measuring and analyzing the electrical impedance of a transducer. As a piezoelectric transducer is a primarily capacitive device, its reactance becomes small at high frequencies, reducing sensitivity to structural damage and increasing the excitation current required from the measuring system. Therefore, this paper proposes the use of a negative capacitance (NC) interface with the transducer to improve sensitivity to structural damage and reduce the excitation current. The improvement obtained with the NC interface is theoretically analyzed using an electromechanical model and experimentally validated with tests on an aluminum structure. The results conclusively indicate a significant improvement in the sensitivity to structural damage and a reduction in excitation current, which are critical for detecting incipient damage and developing onboard monitoring systems where the output current drive is usually low. (AU)

FAPESP's process: 17/23157-3 - Structural Health Monitoring Using Piezoelectric Transducers Excited with High Frequency Signals
Grantee:Fabricio Guimarães Baptista
Support Opportunities: Regular Research Grants
FAPESP's process: 18/09312-9 - Measurement and signal acquisition techniques from piezoelectric transducers excited with high frequency signals in the structural health monitoring
Grantee:Danilo Ecidir Budoya
Support Opportunities: Scholarships in Brazil - Doctorate