PIR motion sensor
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United States of America Patent
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Jul 13, 2010
Grant Date -
Oct 27, 2005
app pub date -
May 20, 2005
filing date -
Mar 14, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A passive infrared sensor has two detection members established by respective detectors and optical elements, with alternating spatial volumes being monitored by each detection member. No dead space need exist between volumes. The detection members are configured such that a moving object causes the members to output different frequencies, whereas a non-moving stimulus produces the same frequency from both detection members.
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