Geometrical instruments – Indicator of direction of force traversing natural media – Magnetic field responsive
Reexamination Certificate
2011-02-17
2011-11-22
Fulton, Christopher (Department: 2841)
Geometrical instruments
Indicator of direction of force traversing natural media
Magnetic field responsive
Reexamination Certificate
active
08061049
ABSTRACT:
A parameter related to the Earth's magnetic field can be used to determine accuracy of a magnetometer of a mobile device. In one aspect, a first instance of a parameter related to Earth's magnetic field is determined using data generated by the magnetometer. The magnetometer data can be based in part on a position of the mobile device with respect to the Earth. A second instance of the parameter can be determined using data generated by a model of Earth's magnetic field. The model data can also be based in part on the position of the mobile device with respect to the Earth. The first instance of the parameter can be compared with the second instance of the parameter. An accuracy metric for the magnetometer can be determined based on a result of the comparison. An indication of the accuracy metric can be presented by the mobile device.
REFERENCES:
patent: 5349529 (1994-09-01), Masumoto et al.
patent: 5761094 (1998-06-01), Olson et al.
patent: 5946813 (1999-09-01), Nachbaur et al.
patent: 6311129 (2001-10-01), Lin
patent: 6384384 (2002-05-01), Connolly et al.
patent: 6408245 (2002-06-01), An et al.
patent: 6424914 (2002-07-01), Lin
patent: 6508316 (2003-01-01), Estes et al.
patent: 6539639 (2003-04-01), Smith
patent: 6622091 (2003-09-01), Perlmutter et al.
patent: 6651003 (2003-11-01), Woloszyk et al.
patent: 6768452 (2004-07-01), Gilkes
patent: 6807485 (2004-10-01), Green
patent: 6964107 (2005-11-01), Ahola
patent: 6988049 (2006-01-01), Wirtz et al.
patent: 7196660 (2007-03-01), Abraham
patent: 7210236 (2007-05-01), Sato et al
patent: 7248983 (2007-07-01), Fillatreau et al.
patent: 7275008 (2007-09-01), Plyvanainen
patent: 7331115 (2008-02-01), Schierbeek et al.
patent: 7391366 (2008-06-01), Park et al.
patent: 7451549 (2008-11-01), Sodhi et al.
patent: 7458166 (2008-12-01), Parks et al.
patent: 7548200 (2009-06-01), Garin
patent: 7565839 (2009-07-01), Stewart et al.
patent: 7891103 (2011-02-01), Mayor et al.
patent: 2003/0135327 (2003-07-01), Levine et al.
patent: 2005/0174324 (2005-08-01), Liberty et al.
patent: 2005/0223575 (2005-10-01), Fillatreau et al.
patent: 2005/0240347 (2005-10-01), Yang
patent: 2005/0288805 (2005-12-01), Moore
patent: 2006/0066295 (2006-03-01), Tamura et al.
patent: 2006/0190174 (2006-08-01), Li et al.
patent: 2006/0195254 (2006-08-01), Ladetto et al.
patent: 2006/0271295 (2006-11-01), McLaren et al.
patent: 2007/0156337 (2007-07-01), Yanni
patent: 2008/0066331 (2008-03-01), Brzezinski et al.
patent: 2008/0201096 (2008-08-01), Wright et al.
patent: 2009/0033807 (2009-02-01), Sheng et al.
patent: 2009/0054075 (2009-02-01), Boejer
patent: 2009/0070058 (2009-03-01), Lin
patent: 2009/0089001 (2009-04-01), Lin
patent: 2009/0171607 (2009-07-01), Chen et al.
patent: 2009/0326851 (2009-12-01), Tanenhaus
patent: 2010/0121599 (2010-05-01), Boeve et al.
patent: 1 221 586 (2002-07-01), None
patent: 2005-134343 (2005-05-01), None
patent: WO 2008/122904 (2008-10-01), None
patent: WO 2009/068116 (2009-06-01), None
Seong Yun Cho et al., “A Calibration Technique for a Two-Axis Magnetic Compass in Telematics Devices”, Jun. 2005, ETRI Journal, vol. 27, No. 3, pp. 280-288.
Chris M. Goulet, “Magnetic Declination, Frequently Asked Questions”, Oct. 2001, Version 4.4, [Online] [Retrieved on May 16, 2009]. Retrieved from the Internet: URL: http://www.geocities.com/magnetic—declination/, 16 pages.
PNI Sensor Corporation, “Calibration Computations for Practical Compassing using the PNI-11096 Magnetometer ASIC”, Aug. 2008, PNI Corporation © 2001, Santa Rosa, CA, 3 pages.
PNI Sensor Corporation, “Multipoint Calibration Primer”, (no publication date available), PNI Corporation, Santa Rosa, CA, 10 pages.
An Overview of the Earth's Magnetic Field, “The Earth's Magnetic Field—An Overview”, [Online] [Retrieved on May 16, 2009]. Retrieved from the Internet: URL: http://www.geomag.bgs.ac.uk/earthmag.html, 10 pages.
The Earth's magnetic field, EPS 122: Lecture 5—Earth's magnetic field, 11 pages.
Apptism, iTopoMaps, © 2009 Apptism, [Online] [Retrieved on Jun. 2, 2009]. Retrieved from the Internet: URL: http://www.apptism.com/apps/itopomaps, 4 pages.
Apptism, Compass Go, © 2009 Apptism, [Online] [Retrieved on Jun. 3, 2009]. Retrieved from the Internet: URL: http://www.apptism.com/apps/compass-go, 2 pages.
Apptism, Focalware, © 2009 Apptism, [Online] [Retrieved on Jun. 3, 2009]. Retrieved from the Internet: URL: http://www.apptism.com/apps/focalware, 2 pages.
Harper et al., “Process for Improving GPS acquisition assistance data and server-side location determination for cellular networks,” 2004 Intl Symp on GNSS/GPS, Dec. 6-8, 2004, Sydney, Australia, 15 pages.
Adiprawita et al., “Development of AHRS (Attitude and Heading Reference System) for Autonomous UAV (Unmanned Aerial Vehicle),” Proc Int'l Conf Electrical Engineering and Informatics, Institut Teknologi Bandung, Indonesia, Jun. 17-19, 2004, 4 pages.
Zhang and Gao, “A Novel Auto-calibration Method of the Vector Magnetometer,” Ninth Intl Conf on Electronic Measurement & Instruments, ICEMI '2009, pp. 1-145 through 1-150.
Camps et al., “Numerical Calibration for 3-Axis Accelerometers and Magnetomors,” IEEE, 2009, pp. 217-231.
“Honeywell 3-Axis Digital Compass IC, HMC5843 Electronic Compass,” Honeywell International Inc. [online]; retrieved from the Internet: <URL: http://www.honeywell.com/sites/portal?smap=aerospace&page=Magnetic-Sensors3&theme=T15&catID=CF84B17AB-A90F-716D-10BC-A1E75441138E&id=HF916B4E0-4F71-9DB5-DFA8-51B1944918EE&se1=2&se14=1>, retireved on Jun. 5, 2005, 1 page.
Westerberg, “Compass Go,” Apple Apps Store, Oct. 10, 2008, 3 pages.
Huang Ronald Keryuan
Mayor Robert
Patel Parin
Piemonte Patrick
Apple Inc.
Fish & Richardson P.C.
Fulton Christopher
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