Device for calibration of magnetic sensors in three dimensions
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United States of America Patent
Stats
-
Aug 21, 2007
Grant Date -
Jul 27, 2006
app pub date -
Jul 1, 2002
filing date -
Jul 1, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic calibration device comprises a mount supporting a magnetic sensor card being detachably attached and comprising at least one magnetic sensor to be calibrated and connected to a first analog electronic circuit with a current source and a first analog to digital converter. A coil card is further detachably attached and comprises three coils arranged substantially orthogonal to each other and connected to a second analog electronic circuit with a second analog to digital converter. A connection such as a cable or a wireless link provides a supply voltage to the first and second analog electronic circuits, respectively, and guides digital signals from the first and second analog to digital converters, respectively, to at least one processing unit. A magnet generates a substantially homogeneous and constant calibration magnetic field, and a rotator rotates said cards in said calibration magnetic field around two substantially orthogonal axes.
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