Sensor system and room surveillance method

摘要

The system has transmitters (3) i.e. infrared transmitter diodes, for sending optical detection signals, and receivers (4) for receiving the signals, where the receivers are arranged in a partially closed room (1) and are connected with each other by a bus (11). The transmitters and receivers form a band-shaped array (20) in form of a closed ring. The array partially defines a monitoring surface that lies over a floor of the room. The transmitters and receivers are arranged along the array such that the signal of one of the transmitters is receivable by the associated receiver. An independent claim is also included for a method for monitoring a partially closed room of a building to determine a residence area and/or a residence type of a person in the room.