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:
Aug. 28, 2018
Filed:
Jul. 26, 2016
Haechitech Corporation, Cheongju-si, KR;
Dong Yoon Kim, Ithaca, NY (US);
Byung Ki Kim, Seongnam-si, KR;
Seung Hwan Park, Sejong-si, KR;
Hyung Sik Shin, Seoul, KR;
Kyoung Suck Ki, Cheongju-si, KR;
Jo An Na, Seoul, KR;
Young Joon Kim, Seoul, KR;
Yeon Soo Choi, Seongnam-si, KR;
HAECHITECH CORPORATION, Cheongju-si, KR;
Abstract
A method of correcting an output value of a geomagnetic sensor that recursively calculates a state estimate, an estimate gain vector, and an estimate error co-variance based on the output value of the geomagnetic sensor that is acquired sequentially and corrects the output value of the geomagnetic sensor based on the value includes acquiring a koutput value of the geomagnetic sensor, calculating a kestimate gain vector based on a k−1estimate error co-variance and the koutput value, calculating a kstate estimate based on the calculated kestimate gain vector and the koutput value and a k−1state estimate, calculating the kestimate error co-variance using the kestimate gain vector and a k−1estimate error co-variance, and correcting the output value of the geomagnetic sensor based on the kstate estimate, wherein k is a natural number larger than 1.