G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 7/00 (2006.01) G01B 7/02 (2006.01) G01D 5/14 (2006.01)
Patent
CA 2227032
A contactless position sensor including a Hall-effect cell (10) and a magnetic circuit consisting of a permanent magnet (18) and two pole pieces (20, 22). The magnet (18) and the cell (10) are arranged side by side between the pole pieces (20, 22), and said pole pieces comprise active surfaces (32, 34) at the opposite end from the cell relative to the magnet. This arrangement directly produces an output signal (Va-Vb) proportional to the distance (e) between the active surfaces (32, 34) and the target (38).
Un capteur de position sans contact comprend une cellule (10) à effet Hall et un circuit magnétique formé d'un aimant permanent (18) et de deux pièces polaires (20, 22). L'aimant (18) et la cellule (10) sont placés côte à côte entre les pièces polaires (20, 22) et ces dernières comportent des surfaces actives (32, 34) à l'opposé de la cellule par rapport à l'aimant. Cet agencement permet d'obtenir directement un signal de sortie (Va - Vb) proportionnel à la distance (e) qui sépare les surfaces actives (32, 34) de la cible (38).
Frere Jean-Yves
Guyot Jean-Christophe
Aerospatiale Societe Nationale Industrielle
Goudreau Gage Dubuc
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