| 摘要 |
In a non-contacting angular position sensor (10), an angular positioning of a rotating object, such as a crankshaft, is measured by a Hall effect device (34) that remains stationary in an air gap (33) between two discs (12, 22), both coupled to the rotating object via a shaft (11). A ring magnet (32) is attached to one of the two discs (22) that has a groove (26) therein. The groove (26) varies in width from a wide region (27) to a narrow region (29). There is a transition region (28) between where the groove (26) is narrowest and where it is widest. As the shaft (11) rotates, the Hall effect device (34) senses a magnetic field that varies with the width of the groove (26), thereby measuring the angular position of the rotating object coupled to the shaft (11).
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