Encoder apparatus and methods employing optical and...

H - Electricity – 02 – P

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H02P 6/12 (2006.01) G01D 5/347 (2006.01) G01D 5/36 (2006.01) G01P 3/486 (2006.01) H02P 7/00 (2006.01)

Patent

CA 2247353

Optical encoder apparatus and methods are provided for converting the cyclic motion of an electro-mechanical machine, such as an electric motor, into at least one electrical signal having a predetermined waveform. The apparatus may include at least one photo-detector (26) which is responsive to at least one pattern of incident radiant energy; at least one photo-emitter (24) that emits a supply of radiant energy coupled to the photo-detector by an optical path; and an optically programmed system including an optical encoder disc (30) which contains at least one optically detectable graphical pattern (32) and a mask (36) containing at least one aperture (38) which permits the pattern of radiant energy to pass to the detector.

L'invention concerne un appareil et des procédés de codage optique pour convertir le mouvement cyclique d'une machine électromécanique, telle qu'un moteur électrique en au moins un signal électrique ayant une forme d'onde prédéterminée. Le système peut comprendre au moins un photodétecteur (26) qui réagit au moins à un motif d'énergie radiante incidente; au moins un photoémetteur (24) qui constitue une source émettant une énergie radiante couplée à un photodétecteur par un trajet optique; et au moins un système programmé optiquement comprenant un disque de codage optique (30) qui contient au moins un motif graphique détectable optiquement (32) et un masque (36) contenant au moins une ouverture (38) qui permet au motif d'énergie radiante d'atteindre le détecteur.

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