Person-detecting sensor and automatic water faucet
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United States of America Patent
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May 30, 2017
Grant Date -
Mar 24, 2016
app pub date -
Nov 25, 2015
filing date -
May 31, 2013
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Abstract
A person-detecting sensor includes: a range-finding unit that decides whether distance to a detection object falls within a predetermined detection distance range; and a specular reflection decision unit that decides whether reflected light is specularly-reflected light. The specular reflection decision unit performs a threshold determination regarding the count of pixels or the proportion of pixels exhibiting a received-light quantity of a predetermined proportion or greater with respect to the maximum received-light quantity among received-light quantities from the reflected light and decides that the reflected light is specularly-reflected light when the count of the pixels or the proportion of the pixels is a predetermined threshold or less.
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