| 摘要 |
PURPOSE: A method, a device, and a system for sensing separation are provided to previously prevent the loss of important belongs or a person to be protected. CONSTITUTION: A tag registration unit(210) registers a tag included in an object. A critical separation distance setting unit(220) sets the critical separation distance about the registered tag. A separation distance measuring unit(230) measures the separation distance from an object through communication between a reader and a registered tag. If the measured separation distance is over the set separation critical distance, a separation danger state determining unit(240) determines the separation danger state. A separation danger notifying unit(250) notifies the separation danger.
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