A differential fibre-optic sensor for the monitoring of ultrasound

B. A. Williams; R. J. Dewhurst

A differential fibre-optic sensor for the monitoring of ultrasound

B. A. Williams, R. J. Dewhurst

Research output: Contribution to journal › Article › peer-review

Abstract

fKnife-edge and differential optical beam deflection (OBD) techniques are capable of non-contact broadband measurement of laser-generated ultrasound. We describe a fibreoptic sensor based on both knife-edge and differential schemes, which has an angular deflection sensitivity of ≈ I urad. This sensitivity was sufficient to detect a Rayleigh wave propagating along various metal surfaces and Rayleigh waves reflected from artificial slot and fatigue crack defects. Further studies with the sensor have shown that it is capable of detecting defects in thin aluminium samples using mode converted laser-generated Lamb waves.

Original language	English
Pages (from-to)	243-255
Number of pages	12
Journal	Transactions of the Institute of Measurement and Control
Volume	20
Issue number	5
Publication status	Published - 1998

Keywords

Fibre optics
Optical detection
Ultrasound

Cite this

@article{13946d94f36943898b5998ed6f798f4e,

title = "A differential fibre-optic sensor for the monitoring of ultrasound",

abstract = "fKnife-edge and differential optical beam deflection (OBD) techniques are capable of non-contact broadband measurement of laser-generated ultrasound. We describe a fibreoptic sensor based on both knife-edge and differential schemes, which has an angular deflection sensitivity of ≈ I urad. This sensitivity was sufficient to detect a Rayleigh wave propagating along various metal surfaces and Rayleigh waves reflected from artificial slot and fatigue crack defects. Further studies with the sensor have shown that it is capable of detecting defects in thin aluminium samples using mode converted laser-generated Lamb waves.",

keywords = "Fibre optics, Optical detection, Ultrasound",

author = "Williams, {B. A.} and Dewhurst, {R. J.}",

year = "1998",

language = "English",

volume = "20",

pages = "243--255",

journal = "Transactions of the Institute of Measurement and Control",

issn = "0142-3312",

publisher = "Sage Publications Ltd",

number = "5",

}

TY - JOUR

T1 - A differential fibre-optic sensor for the monitoring of ultrasound

AU - Williams, B. A.

AU - Dewhurst, R. J.

PY - 1998

Y1 - 1998

N2 - fKnife-edge and differential optical beam deflection (OBD) techniques are capable of non-contact broadband measurement of laser-generated ultrasound. We describe a fibreoptic sensor based on both knife-edge and differential schemes, which has an angular deflection sensitivity of ≈ I urad. This sensitivity was sufficient to detect a Rayleigh wave propagating along various metal surfaces and Rayleigh waves reflected from artificial slot and fatigue crack defects. Further studies with the sensor have shown that it is capable of detecting defects in thin aluminium samples using mode converted laser-generated Lamb waves.

AB - fKnife-edge and differential optical beam deflection (OBD) techniques are capable of non-contact broadband measurement of laser-generated ultrasound. We describe a fibreoptic sensor based on both knife-edge and differential schemes, which has an angular deflection sensitivity of ≈ I urad. This sensitivity was sufficient to detect a Rayleigh wave propagating along various metal surfaces and Rayleigh waves reflected from artificial slot and fatigue crack defects. Further studies with the sensor have shown that it is capable of detecting defects in thin aluminium samples using mode converted laser-generated Lamb waves.

KW - Fibre optics

KW - Optical detection

KW - Ultrasound

M3 - Article

SN - 0142-3312

VL - 20

SP - 243

EP - 255

JO - Transactions of the Institute of Measurement and Control

JF - Transactions of the Institute of Measurement and Control

IS - 5

ER -

A differential fibre-optic sensor for the monitoring of ultrasound

Abstract

Keywords

Fingerprint

Cite this