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Optical feedback or self-mixing interferometry technique has been widely used for sensing vibration, displacement, velocity, distance and flow applications. Such applications require an accurate and consistent output for real-time target measurements. In this article, we have suggested an FPGA-based system architecture and programming model for real-time self-mixing interferometric sensor applications...
This document presents a survey on reported devices exploiting the emerging technology of self-mixing interferometry for non-contact displacement reconstruction. Nowadays, there is a broad diversity of signal processing methods over self-mixing devices, making difficult to decide which one would satisfy a given application domain. It has been observed that a change in the requirements specification...
Laser self-mixing (SM) sensors are successfully used to measure displacement in the absence of speckle. However, speckle deforms the SM signal rendering it unusable for standard displacement extraction techniques. This article proposes a new signal-processing technique, based on tracking the signal envelope, to remedy this problem. Algorithm was successfully employed to measure long-range displacements...
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