Patent ID: 8054068

Claim:
A magnetic absolute position sensor, comprising: a read head being connected to a power source and having a receiving chamber and being provided with a first position sensing unit and a second position sensing unit; a horizontal magnetic scale having at least one magnetic zone formed on a surface thereof, the magnetic zone including an N magnetic pole and an S magnetic pole, the first position sensing unit produces signal relative to the horizontal magnetic scale, and a distance between the first position sensing unit and the horizontal magnetic scale is constant; an oblique magnetic scale disposed beside the horizontal magnetic scale and including a magnetic zone formed a surface thereof, the magnetic zone of the oblique magnetic scale having an N magnetic pole and an S magnetic pole arranged in a direction intersecting an arrangement direction of the N magnetic pole and the S magnetic pole of the horizontal magnetic scale, the second position sensing unit produces signal relative to the oblique magnetic scale, and a distance between the second position sensing unit and the oblique magnetic scale is not constant; and an absolute position identifying system including a converting unit and a calculation unit and being disposed in the receiving chamber of the read head, the converting unit being connected to the first and second position sensing units, respectively, to perform signal conversion, the calculation unit being connected to the converting unit to work out absolute position coordinates through signal calculation.