| 摘要 |
A system for tracing of an object, comprises a communication unit (100) which in a normalcy is placed close to the object. The communication unit (100) contains a reader (110). a radio station (120) adapted to communication with a base station (130) and an electrical energy supply (140). The system furthermore has an ID unit (125) in or at the object. The ID unit (125) has a unique ID. and contains a receiver and a transmitter adapted to transmit the unique ID of the chip as a response to an incoming signal from the reader (110). An alarm circuit (115) is placed between the reader (110) and the radio station (120). Alarm circuit is configured to trigger an alarm if the reader does not receive a response from the ID unit. The communication unit (100) may further comprise means for determining the geographical position of the radio station (120). In an application for monitoring of animals the energy supply (140) may be charged by a generator which converts motion energy to chemical energy in the energy supply (140). |
