Human occupancy detection method and system for implementing the

Details Human occupancy detection method and system for implementing the Human occupancy detection method and system for implementing the

1995-12-08

1997-12-30

Porta, David P.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

G01J 502

Patent

active

057033676

ABSTRACT:
A primary object of the invention is to provide a method and system for detecting humans present in a restricted space, particularly, in a commuter train, a building, etc., by using an infrared sensor capable of detecting the presence of humans, and for judging the ratio of human occupancy in that space. To accomplish this object, according to the invention, the infrared sensor is installed, for example, on a ceiling near the center of a room, and the whole room space is scanned by the infrared sensor to detect in which region of the room a human is present. The proportion of human presence regions thus detected to the whole detection region is determined as the ratio of human occupancy. More specifically, a designated space is detected by the infrared sensor, and only human presence regions are extracted from that space; then, the ratio of human occupancy in the room is estimated from the ratio of the area of the extracted human presence regions to the area of the whole detection area.

REFERENCES:
patent: 4847485 (1989-07-01), Koelsch
patent: 4849737 (1989-07-01), Kirihata et al.
patent: 5068537 (1991-11-01), Ishikawa et al.
European Search Report No. 95119313.5.

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