Detection of acoustic emission in cutting processes by fibre optic interferometry

R. McBride, Tom Carolan, J. S. Barton, S. J. Wilcox, W. K D Borthwick, J. D C Jones

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Acoustic emission has previously been shown to be a useful technique in monitoring the state of wear in machine tools. The piezoelectric transducers conventionally used for acoustic emission detection are contacting devices with a limited bandwidth. Operationally, a non-contacting transducer of broader bandwidth would be preferred. We have accordingly developed a technique based on optical interferometry, using fibre optics, to produce a miniature and robust probe for detecting acoustic emission by measuring the small amplitude (approximately 0.1 nm), high frequency (0.1-1 MHz) surface vibrations that it produces. We demonstrate the technique in measurements made probing both the workpiece and the rotating tool holder during face milling of mild steel.

Original languageEnglish
Pages (from-to)1122-1128
Number of pages7
JournalMeasurement Science and Technology
Issue number10
Publication statusPublished - Oct 1993


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