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Recent years, crustal activities become more frequent and earthquakes happen from time to time. Rescue operations after the catastrophe will become harder as time passes.
Beacon is used in the later period of rescue, the equipment are sent to distress areas by air-drop，detecting network will cover the area after landing. Each Beacon will emit different light signals according to the strength of vital signs. Different signals in the network will then be picked up and identified. It not only expands the searching range, reduces number of rescuers, but also saves a considerable amount of time.
Yang Li, Zhaonan Yang, Xu Chen, Dexin Yang