Institut Vedecom

Université Versailles Saint-Quentin-En-Yvelines

Luc Chassagne

Bastien Bechadergue

Hongyu Guan

The present invention relates to an optical telemetry system for measuring the distance between two vehicles comprising a first optoelectronic assembly formed by at least one light source SLand at least one photosensitive sensor CP+, which source and sensor are oriented towards in front of the vehicle, and a second optoelectronic assembly formed by at least one light source SL() and at least one photosensitive sensor CP() that is oriented towards behind the vehicle, characterized in that said light sources SLand SLare conventional light sources, the light source SLbeing modulated by a signal of frequency F, said light source SL() of the target () being modulated by a clock of frequency controlled by a phase-locked loop driven by the electrical signal delivered by said photosensitive sensor CP, said first optoelectronic assembly furthermore comprising a circuit for measuring the phase shift between the electrical signal delivered by said photosensitive sensor CP() and the signal modulating the paired light source SL(), said system furthermore comprising a computer for determining the distance depending on the frequency Fand the measured phase shift. The invention also relates to an optoelectronic assembly for an optical telemetry system, to a vehicle equipped with such a system and to a telemetry method.

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Montrouge, France

Luc Chassagne