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. 22, 2007
Filed:
Apr. 14, 2006
Masakatsu Kourogi, Ibaraki, JP;
Takeshi Kurata, Ibaraki, JP;
Takakazu Kato, Ibaraki, JP;
Takashi Okuma, Ibaraki, JP;
Nobuchika Sakata, Ibaraki, JP;
Masakatsu Kourogi, Ibaraki, JP;
Takeshi Kurata, Ibaraki, JP;
Takakazu Kato, Ibaraki, JP;
Takashi Okuma, Ibaraki, JP;
Nobuchika Sakata, Ibaraki, JP;
Abstract
A posture angle processing apparatus includes a magnetic sensor, a gravitational acceleration sensor, a position information acquisition device, and a dip angle database device wherein a correlation of the absolute location and a geomagnetic dip angle at the corresponding point is stored. Based on the absolute location of the current point, a dip angle estimation and determination device reads the geomagnetic dip angle at the current point, calculates an angle formed by a horizontal plane and the magnetic vector, compares the angle formed by the magnetic vector and the horizontal plane with the geomagnetic dip angle of the current point, and outputs either a true signal or a false signal depending on the error between the angle and the geomagnetic dip angle.