Pet resistant pir detector

Details Pet resistant pir detector Pet resistant pir detector

G - Physics

08

B

G08B 13/193 (2006.01)

Patent

CA 2300644

A passive infrared sensor uses a modified lens or mirror to vertically elongate the detection zones in regions close to the sensor. This vertical elongation reduces the signal produced by a small pet, such as a cat, while the greater height of a human intruder produces a larger signal. The sensor advantageously uses a single detector and the same algorithm is used to distinguish human intruders from small pets.

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