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At present, the epidemic situation in many countries is severe. A widespread way of COVID-19 virus infection is unintentional close contact with infected patients. When going out, people should try to reduce contact with others and keep a safe distance.
Based on this conception, we designed this leg ring. When the user walks, the leg ring will project a Φ 1m light ring to the ground to remind himself and others to stay away. If the distance between is too close, the light will turn red and the leg ring will vibrate to draw users' attention.