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The child's knee-pads are equipped with a color recognition sensor,some dangerous places in the house have been labeled with coloured tags,when the baby is close to the dangerous place, the knee-pads will sense the coloer and sound the alarm instantly.
zhejiang university
ningbo, China
zhejiang university
ningbo, China
Han Lei,Yijun Zhao,Hejun Zhu,Dandan Li