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:
Jun. 09, 2009
Filed:
Nov. 08, 2004
Woong Kwon, Gyeonggi-do, KR;
Kyung-shik Roh, Gyeonggi-do, KR;
Woo-sup Han, Gyeonggi-do, KR;
Young-bo Shim, Seoul, KR;
Boldyrev Serguei, Gyeonggi-do, KR;
Woong Kwon, Gyeonggi-do, KR;
Kyung-shik Roh, Gyeonggi-do, KR;
Woo-sup Han, Gyeonggi-do, KR;
Young-bo Shim, Seoul, KR;
Boldyrev Serguei, Gyeonggi-do, KR;
Samsung Electronics Co., Ltd., Suwon-Si, Gyeonggi-Do, KR;
Abstract
A motion estimation method and system for a mobile body are provided. The method includes: obtaining magnetic field information from compass information of the mobile body; comparing the magnetic field of the mobile body with a predetermined value and determining whether a position of the mobile body belongs to a specific region according to the comparison result; and estimating a direction of the mobile body by determining whether a compass azimuth angle is used for direction estimation of the mobile body according to the determination result. The system, in which a gyro, odometers, and compasses are installed, comprises: a magnetic field calculator calculating the magnitudes of magnetic fields of the mobile body; a magnetic field comparator obtaining differences between the magnitudes of the magnetic fields and the magnitude of the geomagnetic field and comparing the differences with the first threshold value; a geomagnetic region determiner determining whether a position where the mobile body exists belongs to a region where the geomagnetism works according to the comparison result; and a moving direction estimator estimating a moving direction of the mobile body by determining whether or not to use azimuth angles of the compasses for direction estimation of the mobile body according to the determination result.