Air core gauge magnetic hysteresis compensation

Details Air core gauge magnetic hysteresis compensation Air core gauge magnetic hysteresis compensation

1992-09-14

1994-10-25

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With electromagnetic field

324144, 324160, 364565, 36457101, G01R 516, G01P 342

Patent

active

053592840

ABSTRACT:
An air core gauge apparatus includes a sensor for determining a measure of a parameter, a microprocessor controller receiving the measure of parameter from the sensor and operative to (a) determine an ideal gauge position responsive to the parameter measurement, (b) determine a center position representing assumed magnetic hysteresis center, (c) compare the ideal position to the center position to determine an offset value, (d) determine a command signal responsive to the ideal signal and the difference signal, and (e) output the command signal, an air core gauge display including an air core gauge, a pointer, and graphics, the pointer being pivotally mounted and rotatable in response to commands given to the air core gauge to indicate information in the display, and an air core gauge driver for driving the gauge responsive to the command signal to rotate the gauge to an angular position representative of the parameter measurement, compensating for effects of magnetic hysteresis in the air core gauge.

REFERENCES:
patent: 3796951 (1974-03-01), Joseph
patent: 4577143 (1986-03-01), Eschrich et al.
patent: 4827209 (1989-05-01), Tanaka et al.
patent: 4928060 (1990-05-01), Ito
patent: 5017861 (1991-05-01), Hukuda
patent: 5051688 (1991-09-01), Murase et al.
Nagami et al, SAE Technical Paper Series No. 920599, Development of an Analog Speedometer Mutually Compatible With A Digital Head Up Display, Feb. 24-28, 1992.

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