Passive sensors and control algorithms for faucets and bathroom flushers
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United States of America Patent
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Nov 21, 2017
Grant Date -
Dec 15, 2011
app pub date -
Apr 11, 2011
filing date -
Nov 20, 2001
priority date (Note) -
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Abstract
An optical system includes one or several passive optical detectors sensitive to ambient (room) light for controlling, for example, the operation of automatic faucets or automatic bathroom flushers. The passive optical sensors provide signals to flow controllers, including control electronics and flow valves and require only very small amounts of electrical power for sensing users of bathroom facilities, and thus enable battery operation for many years. To control the operation of automatic faucets or automatic bathroom flushers based on ambient light, the controller executes novel algorithms.
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