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Have you ever been trying to find the right one from a bunch of keys in darkness? We can quite understand your feeling. OKey is designed to find the key to the problem. Once you stand near the door in a certain range, a small round piece adhered on the right key will glow.
How does that happen? Well, a big round piece containing a button battery should adhered on the door near the lock. When the small round piece on the key gets near to the lock, the big piece will transfer electrical signal and power to the small piece by a physical phenomenon called electromagnetic resonance; then the small piece will glow.
School of Manufacturing Science and Engineering, Sichuan University
Zhengkui / Li Pengcheng / An Zhiyu / Chen Yuemei / Zheng