Magnetic field position and orientation measurement system with

Details Magnetic field position and orientation measurement system with Magnetic field position and orientation measurement system with

1996-06-14

1998-06-16

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

32420717, 324225, 324247, 342450, 364559, G01B 714, G01B 730, G01R 3302, G01R 33025

Patent

active

057676690

ABSTRACT:
The position and orientation of remote sensors is determined using pulsed magnetic fields generated from a fixed location. Pulsed magnetic fields are sequentially generated from a plurality of spatially independent components defining a source coordinate frame. The pulsed magnetic fields are sensed by a remote sensor having a plurality of passive field sensing elements. Eddy current distortions are sensed separately and subtracted by the system. The system measures the effect of metallic objects present in the environment and dynamically adjusts the measured values accordingly. The sensed magnetic fields, free of eddy current distortion, are used in order to calculate the position and orientation of the remote object. The system shortens the duration of pulsed magnetic fields and operates correctly at much further distances for the same energy output as compared to known systems.

REFERENCES:
patent: 4394831 (1983-07-01), Egli et al.
patent: 4945305 (1990-07-01), Blood
patent: 5453686 (1995-09-01), Anderson

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