Passive type moving object detection system

G - Physics – 08 – B

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G08B 13/19 (2006.01) G08B 13/191 (2006.01) G01V 9/04 (1990.01)

Patent

CA 2123296

A passive type moving object detection system which include an infrared detector, infrared sensors mounted on the infrared detector, a detection field including a column of detection regions for monitoring a human intruder and a row of detection regions for detecting a non-human intruder, wherein the column of detection regions have a height covering a human height, an optical system located between the infrared detector and the detection field, the infrared sensors having infrared accepting areas comprising a first section and a second section wherein the first section optically corresponds to the column of detection region and the second section optically corresponds to the row of detection region, so as to receive infrared ray radiating from a moving object passing through the detection regions, and the detector including an arithmetic circuit which makes subtraction between the peak values of signals, generated by the detector, and a decision circuit whereby the balance of subtraction is compared with a reference level.

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