Dual detection sensor system for washroom device
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United States of America Patent
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Apr 14, 2009
Grant Date -
Jun 15, 2006
app pub date -
Dec 14, 2004
filing date -
Dec 14, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A detection system for a washroom device evaluates outputs from an active sensor and a passive sensor to determine whether to activate the device (e.g., operate a valve in a sink or a lavatory). The active sensor has a transmitter that directs a light beam to a selected zone and a receiver that detects whether the light beam is reflected back to the sensor. The passive sensor detects changes in a temperature signature around the washroom device. A controller evaluates the outputs from both the active sensor and the passive sensor to determine how to operate the washroom device.
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