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A double-laser diode onboard sensor for velocity measurements

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4 Author(s)
Raoul, X. ; Ecole Superieure de Plasturgie, Oyonnax, France ; Bosch, T. ; Plantier, Guy ; Servagent, N.

In this paper, we validate the feasibility of an onboard velocity sensor using the self-mixing effect. Roughness of the target surface, wet target surface, noncontrolled changes of incident angle, and speed vector vertical components have been considered during this development. A first prototype has been designed with an automotive application so to illustrate this feasibility. This low-cost and low-clutter prototype presents an interesting basic performance (σ≈0.22%). In order to improve the accuracy as well as the robustness of the system, a double-laser diode sensor has then been tested successfully (σ≈0.038%) by removing the influence of the pitching and the pumping effects.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:53 ,  Issue: 1 )