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:
Jul. 07, 2015
Filed:
Jun. 21, 2012
Mutsumi Suzuki, Tokyo, JP;
Mutsumi Suzuki, Tokyo, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
Rotational angle measurement apparatus measuring magnetic-field angle or rotational angle with sufficient accuracy wherein a non-magnetic conductor is arranged in the vicinity of the magnetic flux generator or the magnetic sensor, even when the magnetic flux generator rotates at high speed. The rotational angle measurement apparatus is configured with a magnetic sensorwhich responds to a magnetic-field angle and a detection unitwhich inputs an output of the magnetic sensor. The rotational angle measurement apparatus is employed with a rotatable bodyprovided with a magnetic flux generator. The output of the magnetic sensor is a raw-angle signal setcorresponding to the magnetic-field angle. The detection unit outputs a corrected angle after a non-magnetic conductor in the vicinity of the magnetic sensor is corrected, using a correction value outputted by a correction function with rotational velocity of the rotatable body as an argument.