Piezoelectric Sensors for Lamb Waves’ Direction of Arrival (DoA) Estimation

Piezoelectric Sensors for Lamb Waves’ Direction of Arrival (DoA) Estimation

A novel strategy to design piezoelectric sensor clusters suited for direction of arrival (DoA) estimation of Lamb waves is presented in this work. The designed clusters are composed by three piezoelectric patches (P1, P2 e P3) to be bonded on the structure to be inspected. In particular, by exploiti...

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Bibliographic Details
Main Authors: Luca De Marchi, Marco Dibiase, Nicola Testoni
Format: Article
Language:English
Published: MDPI AG 2018-11-01
Series:Proceedings
Subjects:
acoustic source location
piezoelectric transducers
Lamb waves
Radon Transform
shaped electrodes
Online Access:https://www.mdpi.com/2504-3900/2/13/806
Description
Summary:A novel strategy to design piezoelectric sensor clusters suited for direction of arrival (DoA) estimation of Lamb waves is presented in this work. The designed clusters are composed by three piezoelectric patches (P1, P2 e P3) to be bonded on the structure to be inspected. In particular, by exploiting the Radon Transform, the proposed sensor design procedure computes the shape of P2 given the shape of P1 so that the difference in time of arrival (DToA) of the Lamb waves at the two patches is linearly related to the DoA. Such properties allow to minimize the DoA uncertainty. The sensor P3 is designed to perform the estimation of DoA without knowing the actual wave velocity. Numerical results show that DoA is extremely robust.
ISSN:2504-3900

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