Instrument for indicating altitude or direction

Details Instrument for indicating altitude or direction Instrument for indicating altitude or direction

1991-07-01

1993-03-09

Woodiel, Donald O.

Measuring and testing

Navigation

Take-off and landing monitors

33355R, 73384, 324244, 340970, 340979, 364443, G01C 2100

Patent

active

051917920

ABSTRACT:
A hand-held instrument adapted selectively to provide a sportsman, such as a mountain climber, with readily-readable indications of the existing altitude or direction. The instrument includes a magnetometer which yields an analog signal as a function of direction and a pressure sensor which yields an analog signal as a function of atmospheric pressure. These analog signals are converted into corresponding digital signals and applied to a microprocessor which acts to control an LCD display having two display modes--one providing a numerical readout of altitude, the other a 360 degree readout of direction. When the microprocessor is switched to the altitude mode, it then processes the signal derived from the pressure sensor to yield a digital output for operating the display to indicate the existing altitude. When the microprocessor is switched to the direction mode, it then processes the signal derived from the magnetometer to yield a digital output for operating the display to indicate the existing direction.

REFERENCES:
patent: 4319487 (1982-03-01), Haase et al.
patent: 5067081 (1991-11-01), Person

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