Magnetic position measuring device using a plurality of sensors and a scale

摘要

PCT No. PCT/AT94/00173 Sec. 371 Date May 17, 1996 Sec. 102(e) Date May 17, 1996 PCT Filed Nov. 17, 1994 PCT Pub. No. WO95/14213 PCT Pub. Date May 26, 1995A magnetic position measuring device includes a sensor and a scale. At least one of the sensor and scale is movable in relation to the other. The sensor includes four sensor elements positioned along a longitudinal axis parallel to the direction of the movement. The scale is made of alternating and repeating first and second sections. The first sections have a first reluctance and the second sections have a second reluctance. The first sections each have a length "l" and the second sections each have a length "s". The Sensor includes a field plate and four sensor elements positioned on the field plate along the longitudinal axis. The four sensor elements include first and second outer sensor elements and first and second inner sensor elements.