Data processing: measuring – calibrating – or testing – Calibration or correction system
Reexamination Certificate
2008-01-29
2008-01-29
Bui, Bryan (Department: 2863)
Data processing: measuring, calibrating, or testing
Calibration or correction system
C033S356000, C342S357490, C701S224000, C702S092000
Reexamination Certificate
active
07324906
ABSTRACT:
In a compass sensor unit, an azimuth data computing method is carried out by the steps of: inputting a signal from a geomagnetic sensor to measure magnetic field; determining whether to store measurement data of the magnetic field based on a distance from the last stored measurement data; calculating an offset value based on the stored data; making a comparison for each component of a plurality of measurement data used for calculating the offset value, and judging the offset value to be valid when a difference between the maximum and minimum values of each component is a given value or more; updating the already stored offset value to the offset value judged to be valid; and correcting newly provided measurement data by the updated offset value to compute azimuth data.
REFERENCES:
patent: 6768957 (2004-07-01), Kato
patent: 6946991 (2005-09-01), Hasebe et al.
patent: 7028410 (2006-04-01), Sato et al.
patent: 2003/0013507 (2003-01-01), Sato
patent: 2003/0134665 (2003-07-01), Kato et al.
patent: 2005/0072011 (2005-04-01), Miyashita et al.
patent: 2005/0150122 (2005-07-01), Cho et al.
patent: 1 519 148 (2005-03-01), None
patent: 56-006169 (1981-01-01), None
patent: 3-152412 (1991-06-01), None
patent: 8-105745 (1996-04-01), None
patent: 9-133530 (1997-05-01), None
patent: 2003-090726 (2003-03-01), None
patent: 2003-294447 (2003-10-01), None
patent: 2004-012416 (2004-01-01), None
patent: 2005-249619 (2005-09-01), None
patent: WO 2004/003476 (2004-01-01), None
International Search Report dated Nov. 22, 2005.
Written Opinion of the International Searchin Authority and International Search Report for parent PCT/JP2004/011191.
Written opinion of the International Searching Authority and International Search Report for PCT/JP2004/010479.
Omura Masayoshi
Sato Hideki
Wakui Yukio
Bui Bryan
Dickstein & Shapiro LLP
Le John
Yamaha Corporation
LandOfFree
Compass sensor unit and portable electronic device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compass sensor unit and portable electronic device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compass sensor unit and portable electronic device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2813083