The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2007
Filed:
Jun. 18, 2004
Emi Takuma, Shizuoka-ken, JP;
Emi Takuma, Shizuoka-ken, JP;
Yazaki Corporation, Tokyo, JP;
Abstract
A rotation angle detection device capable of easy selection of detection gears is provided to detect a rotation angle of a main gear. The device includes first and second detection gears each rotatable in conjunction with the main gear, a first magnetic sensor for detecting a rotation angle of the first detection gear, a second magnetic sensor for detecting a rotation angle of the second detection gear, and a microcomputer for detecting the rotation angle of the main gear on the basis of the rotation angle detected by the first magnetic sensor and the rotation angle detected by the second magnetic sensor. The periodicity from the first magnetic sensor and the periodicity of the second magnetic sensor are set to be prime to each other. Further, the teeth number of the first magnetic sensor is set to be a numeric value obtained by multiplying the periodicity of the first magnetic sensor by a predetermined integral number. As well, the teeth number of the second magnetic sensor is set to be a numeric value obtained by multiplying the periodicity of the second magnetic sensor by a predetermined integral number.