Position encoder

Details Position encoder Position encoder

G - Physics

01

D

G01D 5/20 (2006.01) G01B 7/00 (2006.01)

Patent

CA 2647289

An inductive position encoder is described having first and second members which are relatively moveable over a measurement path, a magnetic device mounted on the first member; a plurality of first windings mounted on the second member; and a second winding. The magnetic device is operable to interact with the windings such that upon the energisation of either the second winding or the first windings, there is generated a plurality of sensor signals each being associated with a respective one of said first windings and varying with the relative position between said magnetic device and the associated first winding and hence with the relative position between said first and second members. Additionally, the plurality of first windings are arranged along said measurement path so that the sensor signals vary substantially in accordance with a predetermined Gray code.

Un codeur de position inductif est décrit comportant un premier et un second élément qui sont mobiles par rapport à une piste de mesure, un dispositif magnétique monté sur le premier élément, une pluralité de premiers enroulements montés sur le second élément, et un second enroulement. Le dispositif magnétique est apte à interagir avec les enroulements de manière à, suite à l'alimentation en énergie, soit du second enroulement soit des premiers enroulements, il soit produit une pluralité de signaux de capteur chacun étant associé avec respectivement un desdits premier enroulements, et variant avec la position relative entre ledit dispositif magnétique et le premier enroulement associé et ainsi avec la position relative entre lesdits premier et second éléments. De plus, la pluralité de premiers enroulements est disposée le long de ladite piste de mesure afin que les signaux de capteur varient sensiblement selon un code Gray prédéterminé.

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