Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1997-10-15
2000-06-20
Lee, Benjamin C.
Communications: electrical
Condition responsive indicating system
With particular system function
340511, 340521, 340522, 340567, 307116, 307117, 307 32, G08B 2300
Patent
active
060782536
ABSTRACT:
A multiple sensing technology-based occupancy sensor. Ultrasonic and infrared sensors are used to produce first and second occupancy estimator signals that are combined using a fusion based detection algorithm to produce a combined estimator signal. The combined estimator is then used to switch electrical loads when the combined estimator signal is above a predetermined threshold. The result is an occupancy sensor that has a very high probability of occupancy detection and a low probability of false tripping. In addition, infrared sensitivity is adjusted based upon an estimation of the background noise in order to minimize the occurrence of false tripping.
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Lee Benjamin C.
Mytech Corporation
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