Laser Self-Mixing Fiber Bragg Grating Sensor for Acoustic Emission Measurement

Bin Liu; Yuxi Ruan; Yanguang Yu; Jiangtao Xi; Qinghua Guo; Jun Tong; Ginu Rajan

doi:10.3390/s18061956

Sensors (Jun 2018)

Laser Self-Mixing Fiber Bragg Grating Sensor for Acoustic Emission Measurement

Bin Liu,
Yuxi Ruan,
Yanguang Yu,
Jiangtao Xi,
Qinghua Guo,
Jun Tong,
Ginu Rajan

Affiliations

Bin Liu: School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
Yuxi Ruan: School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
Yanguang Yu: School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
Jiangtao Xi: School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
Qinghua Guo: School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
Jun Tong: School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
Ginu Rajan: School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia

DOI: https://doi.org/10.3390/s18061956
Journal volume & issue: Vol. 18, no. 6
p. 1956

Abstract

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Fiber Bragg grating (FBG) is considered a good candidate for acoustic emission (AE) measurement. The sensing and measurement in traditional FBG-based AE systems are based on the variation in laser intensity induced by the Bragg wavelength shift. This paper presents a sensing system by combining self-mixing interference (SMI) in a laser diode and FBG for AE measurement, aiming to form a new compact and cost-effective sensing system. The measurement model of the overall system was derived. The performance of the presented system was investigated from both aspects of theory and experiment. The results show that the proposed system is able to measure AE events with high resolution and over a wide dynamic frequency range.

Published in Sensors

ISSN: 1424-8220 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: http://www.mdpi.com/journal/sensors

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