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IEEE Transactions on Instrumentation and Measurement 53 (2004) 95-101
A double-laser diode onboard sensor for velocity measurements
X. Raoul, T. Bosch, G. Plantier, N. Servagent1
(2004)

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 (/spl sigma//spl ap/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 (/spl sigma//spl ap/0.038%) by removing the influence of the pitching and the pumping effects.
1 :  SUBATECH - Laboratoire SUBATECH Nantes
Physique/Physique/Instrumentations et Détecteurs