| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic detection unit used for a rotation angle detection in an automobile steering, and the like, and provide a rotation angle detection apparatus using the same which does not have errors due to temperature change, or the like, and can detect a rotation angle accurately and without fail. SOLUTION: A plurality of magnetoresistive elements 29, 30 are arranged radially so as to face each other, switching means 31, 32 are disposed each at one end, and a binarizing means 33 is connected to these switching means 31, 32, thereby forming the magnetic detection units 27, 28. The magnetic detection unit 27, 28 are arranged so as to face a first detector 22 and magnets 24, 25 which are at the center of the first detector 22, and the switching means 31, 32 are switched by a control means 35; and the rotation angle of a rotation body 21 is detected, on the basis of output signals of the magnetoresistive elements 29, 30, thereby obtaining those having no error due to temperature change, or the like, and is capable of detecting the rotation angle in an accurate and sure manner. COPYRIGHT: (C)2011,JPO&INPIT |
