Composite sensor for door
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United States of America Patent
Stats
-
Jun 20, 2006
Grant Date -
Aug 19, 2004
app pub date -
Feb 5, 2004
filing date -
Feb 6, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radio-wave transmitter-receiver section (12) forms a radio-wave detection zone (16) for detecting an object at a location way from a door (4). A light emitter-receiver section (20) forms an optical detection zone (42) for detecting an object at a location along and closer to the door (4). The light emitter-receiver section (20) includes mirrors (28, 36) which are used to increase or decrease the depth dimension of the optical detection zone (42) in the direction perpendicular to the door (4).
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