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US 6,624,752 B2Granted
Object detection system
AssigneeBluetags A/S
InventorsNiels Christian Klitsgaard, Carlos Østby, Peter Lund, Bo Christiansen
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Abstract
The present invention relates to a system and a method for detecting and identifying an object. More specifically the invention relates to a tag for attachment e.g. to luggage, the tag being adapted for transmission of an identifiable signal and a receiver for detecting and identifying the signal. The invention is concerned with use of the Internet and handheld terminals such as mobile phones in combination with Bluetooth™ or DECT technology for communicating information in relation to the object.
Claims33
An object detection system comprising:
- at least one first transmitting unit to be located near the object, the first unit having an identity and being provided with a transmitter for transmitting a first signal representing the identity of the first transmitting unit, and
- a receiving unit provided with a receiver for receiving the first signal, the receiving unit being adapted to generate a second signal in case the first signal represents the identity of one of said at least one first transmitting unit,
- the receiving unit being adapted to receive the first signal when the distance between the first transmitting unit and the receiving unit is within a predetermined interval,
- the first transmitting unit being adapted to operate in a first mode and a second mode, the power consumption of the first transmitting unit when operating in the first mode being lower than the power consumption of the first transmitting unit when operating in the second mode, and
- the first transmitting unit being adapted to shift from the operation in the first mode to operation in the second mode upon detection of acceleration.
2 more elements
Dependencies are inferred from the claim text.