发明名称 |
METHODS FOR IMPROVED HEADING ESTIMATION |
摘要 |
Methods for calibrating a body-worn magnetic sensor by spinning the magnetic sensor 360 degrees to capture magnetic data; if the spin failed to produce a circle contained in an x-y plane fit a sphere to the captured data; detemining offsets based on the center of the sphere; and removing the offsets that are in the z-direction. Computing a magnetic heading reliability of a magnetic sensor by determining an orientation of the sensor at one location; transforming the orientation between two reference frames; measuring a first vector associated with the magnetic field of Earth at the location; processing the first vector to generate a virtual vector when a second location is detected; measuring a second vector associated with the magnetic field of Earth at the second location; and calculating the magnetic heading reliability at the second location based on a comparison of the virtual vector and the second vector. |
申请公布号 |
WO2013188548(A3) |
申请公布日期 |
2014.04.17 |
申请号 |
WO2013US45435 |
申请日期 |
2013.06.12 |
申请人 |
TRXS SYSTEMS, INC. |
发明人 |
FUNK, BENJAMIN, E.;HAKIM, DANIEL;KARVOUNIS, JOHN;YOUNG, TRAVIS;TEOLIS, CAROLE |
分类号 |
G01C17/38;G01C21/04;G01C21/08;G01C21/18;G01C21/20;G01D18/00;G01V3/08 |
主分类号 |
G01C17/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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