Three-axis magnetic sensor, an omnidirectional magnetic sensor and an azimuth measuring method using the same
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United States of America Patent
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Mar 25, 2003
Grant Date -
May 16, 2002
app pub date -
Dec 14, 2000
filing date -
Oct 16, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A hybrid three-axis magnetic sensor for calculating the accurate direction of the earth magnetism. The hybrid three-axis magnetic sensor includes: a flux gate type magnetic sensor which is so formed that a base serves as a main member and detects two axis components of a magnetic vector defined by a plane parallel to the base; a Hall element which detects another component of the magnetic vector orthogonal to the base; a tilt sensor which detects a tilt angle of the base; and a CPU, wherein the flux gate type magnetic sensor and the Hall element are integrally structured together as a hybrid IC. The thus detected three dimensional magnetic vector is corrected in the light of inclination of the base, so that the direction of the earth magnetism is accurately calculated.
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