Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-10-21
1999-05-11
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
3405453, 340552, 342 28, G08B13/18
Patent
active
059032170
ABSTRACT:
A microwave motion sensor for detecting multiple levels of motion of a target is disclosed. The motion sensor includes a transceiver for broadcasting a signal into a predetermined area and receiving a reflected signal with a receiver for producing first and second directional signals. A signal conditioning circuit is provided for amplifying the first and second directional signals and digitizing the directional signals. The signal conditioning circuit includes a micro motion amplifier for separately amplifying one of the directional signals and producing a micro motion signal. A processor is provided for receiving the first and second directional signals transmitted by the signal conditioning circuit, and for receiving the micro motion signal. The processor includes a circuit for analyzing the directional signals, and a circuit for comparing the micro motion signal to a threshold. The processor is capable of adaptively switching between a first mode for detecting a threshold level of motion, a second mode for detecting a level of motion which is less than the threshold level of motion, and a third mode for detecting a level of motion which is greater than the threshold level of motion.
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Ladd Ricky J.
Miller Gary L.
Rau Robert S.
Stanczak Mark S.
Hofsass Jeffery A.
Microwave Sensors, Inc.
Trieu Van T.
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