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Mesure laser de trajectoire par décomposition de la mesure locale et globale

Abstract : The devices dedicated to trajectory digitalization are arising a lot of interest the last few years for different applications that can be divided into 5 families : entertainment, simulation for the industry, medical applications, robotics and sports applications. Among the axes of progress, the elimination of both the calibration steps and equipments with complex active markers, constitute a real challenge. The optical techniques allows non contact measurements. Light measurements are carried out using transducer which converts energy or optical power absorbed into an electric signal. The distance can then be estimated through signal processing. Our interest lies in tracking application in the range of several meters with a precision of few millimeters. The most appropriate methods of telemetry are triangulation, phase shifting and time of flight methods. The concept investigated in this works consists of replacing galvanometric scanners which requiring mechanical elements in high dynamics, by a static scanning device based on a network of laser sources. The multi-beam approach allows a first measure of the target position without the need to move. To widen the field of measure, a second device allows to reach a spherical volume. It is the concept of local and global measure combination. This hybrid approach is a cost effective solution. However, the precision could suffer from a reduction. In this work, we present different possibilities for combining global and local measurements. Each set-up will exhibit some disadvantages and weaknesses according to the needs. The use of micro-mirror matrices (DMD), and microfabrication processes offer promising novel approaches toward performant, efficient cost and ease to use.
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  • HAL Id : tel-00647234, version 1

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Florent Souvestre. Mesure laser de trajectoire par décomposition de la mesure locale et globale. Automatique / Robotique. Université Pierre et Marie Curie - Paris VI, 2010. Français. ⟨tel-00647234⟩

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