Distance measuring apparatus and distance measuring method
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United States of America Patent
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Jan 4, 2011
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app pub date -
Apr 6, 2010
filing date -
Oct 19, 2007
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Abstract
Distance measuring apparatus has a rough distance measuring circuit (18) using a time delay circuit and a precise distance measuring circuit (31) for measuring the orientation of the vector of a carrier wave to determine the distance, the sum of which is the final output. The rough distance measuring apparatus (18) has a long measurement span but low precision. The precise distance measuring apparatus (31) has a short measurement span but high precision. The combination provides distance measuring apparatus having a long measurement span and high resolution and capable of implementing precise measurement.
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