Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1998-06-23
2000-08-08
Allen, Stephone B.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250223B, 141 1, G01V 820, G01S 17481
Patent
active
061005185
ABSTRACT:
The present invention relates to a method and apparatus for determining the size of an object. The method includes the steps of reflecting light from the object, measuring a plurality of adjacent light intensities reflected off an axis of the object, comparing adjacent light intensities, identifying a position where the light intensity markedly changes along the axis by a predetermined amount, and determining the size of the object from the identified position. The method is used to determine the amount of liquid necessary to fill a cup of the height determined. The apparatus for determining the size of an object includes means for reflecting light from the object, means for measuring a plurality of adjacent light intensities reflected off an axis of the object, means for comparing adjacent light intensities, means for identifying a position where the light intensity markedly changes along the axis by a predetermined amount, and means for determining the size of the object from the identified position.
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