APPARATUS FOR DETECTING ROTATION ANGLE OF ROTATING BODY

• Main Authors: SATO TAKASHI, SERIZAWA AKIRA
• Format: Patent
• Language: English
• Published: 10.11.2005
• Edition: 7
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

PROBLEM TO BE SOLVED: To provide an apparatus for detecting a rotation angle of a rotating body for attaining an inexpensive and small-sized device with high reliability by providing two sets of magnetic detection element groups on one hole array. SOLUTION: The apparatus for detecting the rotation angle of the rotating body 1 arranges Hall elements H1-H8 to a magnet 5 at an interval of 90° on the circumference of a rotating shaft rotated by the magnet 5. The Hall elements H1-H4 from among the Hall elements H1-H8 belong to a first magnetic detection element group, and the Hall elements H5-H8 belong to a second magnetic detection element group. The two sets of the magnetic detection element groups generate differential data from the two Hall elements at an interval of 180°, detects the rotation angle α of the rotating body from the differential data, and determines the existence of abnormality occurrence. COPYRIGHT: (C)2006,JPO&NCIPI