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Intrinsic optical fibre sensor for monitoring acoustic emission

✍ Scribed by S.X. Zheng; R. McBride; J.S. Barton; J.D.C. Jones; K.F. Hale; B.E. Jones

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
691 KB
Volume
31
Category
Article
ISSN
0924-4247

No coin nor oath required. For personal study only.

✦ Synopsis

A novel intrinsic optical fibre sensor for detection of acoustic emission (AE) has been designed, built and tested. This sensor is intended for use in monitoring machine tool wear. An optical fibre is held between the transducer backing and the surface being probed. The coupling of AE waves through the fibre into the backing causes a phase change in the light transmitted by the fibre. This phase change is detected using a Mach-Zehnder interferometer, locked in quadrature with a phase servo. Acoustic emission during cutting is conveyed to the sensing fibre on the machine bed via either the tool or workpiece. Sensing of AE may then yield information on the state of wear of the tool.

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