Jul 05

International Conference on Vibration Measurements by Laser Techniques and Non-Contact Techniques

Results from the multi-surface vibrometry system developed at by Engineering Photonics1,2 at Cranfield University were presented by Thomas Kissinger at the 12th International conference on laser vibration measurements held in Ancona, Italy.

Figure 1 The conference was held in the historic Muse theatre in the heart of Ancona.

Figure 1 The conference was held in the historic Muse theatre in the heart of Ancona.

Apart from the obvious benefits of good food, nice weather and historic surroundings, see Fig. 1, the long running Ancona laser vibrometry conference is the premier conference in the field. It is a suitable venue to present our work on multi-surface vibrometry, which allows displacement signals from multiple semi-reflecting surfaces along a single laser beam to be evaluated simultaneously. This new technique allowed the concurrent measurement of differential and common-mode vibrations of the cryostat (see Fig. 2) and could also be of use in other situations where differential displacement or vibration measurements are required.

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Figure 2 Typical measurement results obtained from an optical cryostat, showing how differential measurements (bottom) can be extracted from the two directly measured signals of the cryostat window and target (top).

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