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:
Jan. 04, 2011
Filed:
Nov. 07, 2008
Kisei Hirobe, Miyagi-ken, JP;
Yukimitsu Yamada, Miyagi-ken, JP;
Katsuyuki Kawarada, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
The object of the present invention is to provide a calibration program and an electronic compass that make it possible to calibrate the output of a magnetic sensor with a small amount of computation while a user does not notice the execution of calibration. A calibration program according to an aspect of the invention includes: a step of forming at least two trianglesandwith the use of at least four outputs of a magnetic sensor in a three-dimensional space; a step of finding circlesandcircumscribed about the triangleandrespectively; and a step of finding the intersection of normal vectorsandeach of which passes through the center of the corresponding circumscribed circle so as to find a reference point.