Sonitor Technologies As

Filetrac As

Ole Hovind

Rune Holm

Sverre Holm

Eric Sandmol

Sverra Holm

A method and a system for detection and position determination of chips, which transmit ultrasound signals in a room. The system comprises electronic identification chips, which are attached to objects that have to be monitored. Each chip is equipped with a transmitter and a receiver. The signals are received by a plurality of detector units, which are connected to a detector base unit that registers and interprets the signals transmitted form the identification chips. Detector base units located in different rooms are interconnected in a network and transmit processed information to one or more central units for further interpretation and sorting. The special feature of the invention is that line interference is substantially removed, and it is possible to determine position even though the identification chips are in motion.

System and method for position determination of objects

A method and a system () for detection and position determination of chips (), which transmit ultrasound signals in a room. The system () comprises electronic identification chips (), which are attached to objects that have to be monitored. Each chip () is equipped with a transmitter () and a receiver (). The signals are received by a plurality of detector units (), which are connected to a detector base unit () that registers and interprets the signals transmitted form the identification chips (). Detector base units () located in different rooms are interconnected in a network () and transmit processed information to one or more central units () for further interpretation and sorting. The special feature of the invention is that line interference is substantially removed, and it is possible to determine position even though the identification chips () are in motion.

A system for supervision and control of objects or persons within a limited area, such as a building, comprising a plurality of electronic identification chips for placing on respective objects/persons to be supervised/controlled, each chip having stored therein a special ID code and being provided with respective transmitters and receivers for communication via ultrasound as well as audible sound, a plurality of stationary detectors which are interconnected in a network and arranged for both-way communication with the chips, and a central control unit in communication with the chips via the detectors. Each chip is continuously active in operation and is arranged to transmit its ID code at predetermined time intervals. At least one of the detectors or the control unit are being arranged to trigger an alarm unit if an incorrect code is received or an approved code is not received continuously at predetermined time intervals.

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Oslo, Norway

Ole Hovind