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Updated: May 19, 2026

Real-Time Proxy-Control of Re-Parameterized Peripheral Signals using a Close-Loop Interface
Published on: May 8, 2021
Self-mixing vibrometer with real-time digital signal elaboration
Alessandro Magnani1, Alessandro Pesatori, Michele Norgia
1Dipartimento di Elettronica e Informazione, Politecnico di Milano, Milano, Italy.
Abstract:
This work describes the development of an optical sensor for measurement of vibration without contact. The realized vibrometer is based on real-time digital elaboration of the signal obtained by a self-mixing interferometer, with an embedded autofocus system. Two different algorithms are implemented, for the continuous working on diffusive surfaces, with different levels of optical reflectivity. Thanks to the autofocus and the digital processing, the proposed sensor is easy to use and requires no assistance of a skilled operator.
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