Human body detection system

Details Human body detection system Human body detection system

G - Physics

08

B

G08B 13/181 (2006.01) G01V 8/20 (2006.01)

Patent

CA 2092649

In order to detect a position where a human body may exist with the aid of a single infrared detector, a human body detecting system comprises a condenser for the provision of a plurality of effective detection regions each having different areas and provided within partial detection regions. When the human body moves across one of the effective detec- tion regions, the infrared detector detects the infrared rays radiated from the human body to produce signals. Accordingly, the thus output signals present different frequencies depend- ing on the effective detection regions, whereby the differ- ences in the fluctuation times of the output signals and in the frequencies are discriminated by a decision apparatus to consequently detect which partial detection region includes the human body.

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