Radar devices for low power applications and bathroom fixtures
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United States of America Patent
Stats
-
May 14, 2002
Grant Date -
Jul 26, 2001
app pub date -
Mar 26, 2001
filing date -
Jul 18, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A fluid flow device includes an actuator, an RF transmitter, a gated RF receiver, and a processor. The RF transmitter is configured and arranged to produce a plurality of pulses of RF energy spaced apart in time to form a sensor field. The gated RF receiver is configured and arranged to receive RF energy reflected by objects within the sensor field. The processor is coupled to the gated RF receiver for evaluating the reflected RF energy. The processor is also coupled to the actuator and is configured and arranged to activate the actuator in response to the reflected RF energy to control fluid flow. In addition, a new low power radar sensor operates by providing radar pulses that are non-uniformly spaced in time. In operation, a burst of pulses is initiated in the transmitter. Between each burst is a period of rest time in which the transmitter is not transmitting RF energy.
First Claim
Family
International Classification(s)
Cited Art Landscape
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