Boots – shoes – and leggings
Patent
1991-05-30
1994-02-15
Harvey, Jack B.
Boots, shoes, and leggings
364457, 364449, 36457105, 36457102, 324202, 324245, 324247, 73 1E, 33335R, 33356, 33357, 33361, G01C 2500
Patent
active
052872955
ABSTRACT:
An electronic compass (10) having at least two sense windings (11, 12) is mounted in a vehicle. The outputs (x(h), y(h)) of the windings are measured for a number of compass directions (headings). From this data an error difference angle (.phi.), from a nominal angle, which actually exists between the output windings is calculated. Preferably a look-up table (21, 39) is created relating actual compass heading (h) to measured sense winding outputs by utilizing the calculated error difference angle (.phi.). This table is then utilized for calculating actual compass heading based on actual measured sense winding outputs. The calculated error angle (.phi.) can also be used to calibrate the compass without creating a look-up table. The calibrated compass compensates for misalignment of the sense windings and provides a more accurate electronic compass without requiring creating a calibration table by orienting the compass in a very large number of exactly known directions.
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"Automobile Navigation Using a Magnetic Flux-Gate Compass", Timothy J. Peters, IEEE Transactions on Vehicular Technology, vol. VT-35, No. 2, May 1986.
Ives Martin D.
Kozikaro Elisha M.
Harvey Jack B.
Melamed Phillip H.
Moore John H.
Motorola
Wachsman Hal D.
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