Rotary position sensor

摘要

A robust, low cost, compact and highly accurate rotary position sensor (10) is disclosed for measuring the relative angular position (within a range ‰¤ 180°) of a housing (18) or stator and a rotor (14). The housing (18) carries a galvanomagnetic sensing element (80) and is adapted for fixation to a relatively fixed portion of a host system. The rotor (14) carrying a magnet (54) is disposed for rotation about a fixed axis (x) with respect to the stator (18) and is interconnected to a relatively moving portion of the host system through intermediate linkage. The magnet (54) is juxtaposed in substantially axial alignment with the galvanomagnetic sensing element (80) for magnetic interaction therewith. The housing (18) defines a cavity (76) to receive potting material (88) for encasing the galvanomagnetic sensing element (80) and an adjacent buffer cavity (126) interconnected by a weir (118), which diverts ant excess potting material into the buffer cavity (126).