Motion detection sensor with computer interface
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United States of America Patent
Stats
-
Jan 25, 1994
Issued Date -
N/A
app pub date -
Jan 21, 1992
filing date -
Jul 6, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A ceiling sensor designed to interface with the computerized controllers of energy management systems is disclosed. This ceiling sensor is operable to detect motion through the use of a transmitted signal of predetermined frequency which when received has experienced a Doppler shift. Comparison of the received signal with its frequency change to the transmitted signal produces motion detection which when incorporated with an isolated latching relay enables the switching on and off of light, heating, air conditioning or security interfaces. A ceiling sensor is disclosed which is operable to detect the short, quick movements of employees working in a narrow range field of view such as a shop aisle or warehouse corridor. A second ceiling sensor is disclosed which is operable to detect the gross, large movements of employees in a large area such as an open room or warehouse. A method of fabricating a ceiling sensor for a computer controller interface is also described.
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