High precision liquid level gauge system
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United States of America Patent
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Dec 28, 2010
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N/A
app pub date -
Dec 12, 2008
filing date -
Dec 12, 2008
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Abstract
High resolution liquid level gauge includes a float member with a buoyant, free end, and an opposing end rotatably attached to an interior surface of a reservoir such that the float member is free to rotate about an axis of rotation. A single magnet defining a single magnetic field is attached to the pivoting end such that the magnetic field is centered on the axis of rotation and rotates with the float member. A magnetic rotary encoder chip configured to detect angular position of the magnetic field is positioned to be aligned with the axis of rotation on the exterior of the reservoir at a distance from the magnet to detect the magnetic field. The encoder is configured to provide a signal representative of the angle of the magnetic field. A computer processor determines the liquid level within the reservoir based upon the signal.
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