Data processing: measuring – calibrating – or testing – Measurement system – Orientation or position
Reexamination Certificate
2011-01-18
2011-01-18
Barbee, Manuel L (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system
Orientation or position
C702S075000, C033S361000
Reexamination Certificate
active
07873491
ABSTRACT:
In an AC magnetic tracker one or more multi-axis field sources, each operating at a different frequency, or frequency set, are detected and tracked in three-dimensional space, even when wireless or otherwise not physically connected to the tracking system. Multiple sources can be tracked simultaneously as they each operate with their own unique detectable set of parameters. The invention not only provides the ability to uniquely identify one or more sources by their frequencies, but also to synchronize with these frequencies in order to measure signals that then allow tracking the position and orientation (P&O) of the source(s). Further, these sources need not be present at the time of system start-up but can come and go while being detected, discriminated and tracked. It also should be noted that application of such systems in multiples with more sensors not synchronized to a source or sources also could be employed to give the reverse appearance of a known source phase and incoherency with the sensors.
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Higgins Robert F.
Jones, Jr. Herbert R.
Rodgers Allan G.
Alken Inc.
Barbee Manuel L
Gifford Krass Sprinkle Anderson & Citkowski P.C.
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