Calibratable optical distance sensing system and method

G - Physics – 01 – S

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G01S 7/48 (2006.01) G01B 11/02 (2006.01)

Patent

CA 2200837

A calibratable optical distance measuring system (100) and method of calibrating the same utilizes a plurality of electronic calibration constants stored in memory (118) to compensate the measurement output of a position sensitive detector element (18) for variations in physical design and circuit performance parameters. The method of calibrating includes generating the plurality of electronic calibration constants by placing the optical distance measuring system (100) into a calibration fixture (200 or 208) where at least one target object is moved into known distances, and the calibration constants are determined based on the system's measurements of the known distances.

La présente invention concerne un système optique (100) de mesure des distances pouvant être étalonné et un procédé d'étalonnage de ce système. Ils utilisent plusieurs constantes électroniques d'étalonnage enregistrées dans la mémoire (118) pour compenser le résultat des mesures que donne un élément détecteur (18) sensible aux positions afin d'éliminer l'effet des variations dans la conception physique et les paramètres de performances des circuits. Le procédé d'étalonnage comprend la production des diverses constantes électroniques d'étalonnage, qu'on obtient en plaçant le système optique (100) de mesure des distances dans un montage d'étalonnage (200 ou 208) dans lequel au moins un objet-cible est placé à des distances connues, et les constantes d'étalonnage sont déterminées sur la base des mesures des distances connues effectuées par le système.

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