Communications: electrical – Continuously variable indicating – With meter reading
Patent
1992-01-21
1994-01-25
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
34082506, 340541, 340554, H04Q 100
Patent
active
052819612
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.
REFERENCES:
patent: 3898383 (1975-08-01), Herbits
patent: 4225808 (1980-09-01), Saraceni
patent: 4433328 (1984-02-01), Saphir et al.
patent: 4595915 (1986-06-01), Close
patent: 4661720 (1987-04-01), Cameron, Jr. et al.
Holloway III Edwin C.
Novitas, Inc.
Yusko Donald J.
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