Flow meter using digital signals
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United States of America Patent
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Dec 30, 2008
Grant Date -
Oct 4, 2007
app pub date -
Feb 28, 2007
filing date -
Apr 3, 2006
priority date (Note) -
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Abstract
A flow meter using digital signals constructed in a small size and outputting an electric signal of a position of a float in a tapered tube with high accuracy is provided.A first reflecting means 6 has a ray 20 entered from the entering means 5 and reflected, and a second reflecting means 7 reflecting the ray 20 reflected from the first reflecting means 6 toward the first reflecting means 6 at least once. An emitting means 8 has the ray 20 entered and emits it, and an image sensor 9 has the ray 20 from the emitting means 8 entered and outputs an image of the float 3 in the tapered tube 1, while a control portion executes input processing of an image and outputs an electric signal S1 indicating the flow rate of a fluid 2 by detecting the position of the float 3.
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