Combination microwave passive infrared motion detector with...

Details Combination microwave passive infrared motion detector with... Combination microwave passive infrared motion detector with...

G - Physics

08

B

G08B 13/19 (2006.01) G08B 13/184 (2006.01) G08B 29/04 (2006.01)

Patent

CA 2300463

A motion detector of an alarm system has a microwave sensor and a passive infrared sensor, and includes signal processing logic for initiating an anti-masking evaluation upon detection of certain conditions. The detector then samples the sensor signals and compares the signals to a series of possible outcomes. Some of the possible outcomes represent masking conditions, while others represent normal conditions. A match with masking conditions results in an alarm signal being generated.

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