Patent ID: 6205866
Filing Date: 2001-03-27
Classification: G01B,G01L

Abstract:
A sensor device for measuring angle changes of mechanical parts that rotate relative to each other, said sensor device comprisingonly one magnet (3) mounted on a first part and producing a magnetic field consisting of magnetic field lines (4; 4.1,4.2) and having a magnetic pole; andat least one magnetoresistive sensor (5; 5',5"") mounted on a second part and in said magnetic field lines opposite said only one magnet (3), said second part being rotatable relative to said first part;wherein said at least one magnetoresistive sensor has a magnetic-field sensitive layer (MS) facing said magnetic pole of said only one magnet (3) and extending tangentially to a rotation direction in which said parts rotate relative to each other, said at least one magnetoresistive sensor (5, 5',5"") comprising means for generating an electrical output signal according to a direction of said magnetic field lines at said at least one magnetoresistive sensor, whereby said output signal depends on a relative rotational angular position of said parts.