Patent ID: 7219563

Claim:
A non-contact position sensor comprising: a magnetic field generation means rotating together with a rotating shaft; a sensor element for sensing magnetic field changes generated from said magnetic field generation means due to said rotation of said rotating shaft; signal processing means for processing an output signal of said sensor element to measure the rotational angle of said rotating shaft on the basis of the output signal; and correction means for correcting variance among sensors including said sensor element, said signal processing means, and said magnetic field generation elements; wherein, said sensor element outputs first and second outputs v 1 and v 2 ; and said correction means obtains temperature coefficients of amplitude values of said output v 1 and said output v 2 , or temperature coefficients of offset values, or coefficients of variance due to time of said amplitude values, obtains a ratio of said first and second outputs corrected by said coefficients, and calculates an angle using said corrected ratio.