G - Physics – 01 – D
Patent
G - Physics
01
D
G01D 5/26 (2006.01)
Patent
CA 2647644
The invention relates to a method and device for optically determining the position of an object [1] on a determined zone [2] of a substantially plane surface. According to the invention, at least one directional pointlike emitter [E1] associated with at least two receivers [Rl, R2] of directional pointlike light covering the determined zone [2] are disposed in proximity to said determined zone [2], each emitter and receiver of light exhibiting an axis substantially parallel to the determined zone and along which a maximum emission, respectively a maximum angular sensitivity, are observed, in such a way that the axes [AR1, AR2] of the receivers [R1, R2] cut the axis [AE1] of the emitter [E1] at different points [P1, P2]. The light emmitter [E1] is turned on and the position of the object [1] on the axis [AE1] of the emitter [E1] is determined as a function of a comparison of the light signals [S1, S2] reflected and diffused by the object [1] towards each of the two light receivers [R1, R2].
L'invention concerne un procédé et un dispositif de détermination optique de la position d'un objet [1] sur une zone déterminée [2] d'une surface sensiblement plane. Selon l'invention, on dispose, à proximité de ladite zone déterminée [2], au moins un émetteur [E1] ponctuel directionnel associé à au moins deux récepteurs de lumière [Rl, R2] ponctuel directionnel couvrant la zone déterminée [2], chaque émetteur et récepteur de lumière présentant un axe sensiblement parallèle à la zone déterminée le long duquel une émission maximale, respectivement une sensibilité angulaire maximale, sont observées, de manière telle que les axes [AR1, AR2] des récepteurs [R1, R2] coupent l'axe [AE1] de l'émetteur [E1] en des points différents [P1, P2]. L'émetteur de lumière [E1] est allumé et la position de l'objet [1] sur l'axe [AE1] de l'émetteur [E1] est déterminée en fonction d'une comparaison des signaux lumineux [S1, S2] réfléchis et diffusés par l'objet [1] vers chacun des deux récepteurs de lumière [R1, R2].
Cavallucci Gilles
Plantier Philippe
H2i Technologies
Mccarthy Tetrault Llp
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