US Patent No: 5,646,525
Number of patents in Portfolio can not be more than 2000
Three dimensional tracking system employing a rotating field
Stats
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Jul 8, 1997
Issued date -
Feb 8, 1995
filing date -
08/386,909
serial no -
In Force
status
Importance
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Abstract
Apparatus for determining the position and orientation of a helmet worn by a crew member in a vehicle including a generator, associated with the vehicle, which produces a rotating magnetic and electric field of fixed strength, orientation and frequency within at least a portion of the vehicle. The apparatus also includes a plurality of detectors each of which generates a signal proportional to at least one of the electric or magnetic fields at least one point associated with the helmet and calculation circuitry responsive to the signal for ascertaining the coordinates of the at least one point with respect to the generator and for determining the position and orientation of the helmet.
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First Claim
Related Publications
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International Classification(s)
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,287,809 Helmet-mounted sighting system | 139 | 1979 | |
| 4,394,831 Helmet metal mass compensation for helmet-mounted sighting system | 35 | 1981 | |
| 4,829,250 Magnetic direction finding device with improved accuracy | 43 | 1988 | |
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| 4,849,692 Device for quantitatively measuring the relative position and orientation of two bodies in the presence of metals utilizing direct current magnetic fields | 281 | 1986 | |
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| 5,002,137 Moling system | 54 | 1989 | |
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| 4,812,812 Apparatus and method for determining the position and orientation of a remote object | 45 | 1987 | |
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| 4,314,251 Remote object position and orientation locater | 217 | 1979 | |
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| 4,560,930 Distance-measuring system using orthogonal magnetic field generators and orthogonal magnetic field sensors | 48 | 1983 | |