Lamb Wave Detection for Structural Health Monitoring Using a Ï-OTDR System.
Sensors (Basel)
; 22(16)2022 Aug 09.
Article
em En
| MEDLINE
| ID: mdl-36015722
ABSTRACT
In this paper, the use of a phase-sensitive optical time-domain reflectometry (Ï-OTDR) sensor for the detection of the Lamb waves excited by a piezoelectric transducer in an aluminum plate, is investigated. The system is shown to detect and resolve the Lamb wave in distinct regions of the plate, opening the possibility of realizing structural health monitoring (SHM) and damage detection using a single optical fiber attached to the structure. The system also reveals the variations in the Lamb wave resulting from a change in the load conditions of the plate. The same optical fiber used to detect the Lamb waves has also been employed to realize distributed strain measurements using a Brillouin scattering system. The method can be potentially used to replace conventional SHM sensors such as strain gauges and PZT transducers, with the advantage of offering several sensing points using a single fiber.
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Base de dados:
MEDLINE
Assunto principal:
Transdutores
/
Fibras Ópticas
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
Sensors (Basel)
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Itália