In cold winter, people are used to using scarves to keep warm. When you feel the cold, you will tighten the scarf and loosen it when it is hot, but many people will not be able to do so in time. The emergence of Xiaomi smart scarf is to liberate both hands and adjust the tightness of the scarf according to the change of temperature in order to get the best experience of wearing scarf. 

The picture above is a patent announced by Xiaomi: "A smart scarf and its control method" (application number: 201910365123.8). 

This scarf is mainly composed of scarf body 1, temperature sensing unit 2 and infrared heating 3 units. Scarf body is our common traditional scarf, temperature sensing unit is set on the scarf body, used to sense the temperature of the surrounding environment;Similarly, the infrared heating unit is also set on the scarf body, it can connect the induction unit, and then infrared heating the ambient temperature. 
   

As shown in the figure above, the tightening adjustment unit of the millet scarf is connected to the temperature Changan device, which can automatically loosen or tighten the scarf according to the ambient temperature. 

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As shown in the figure above, the loosening adjustment unit includes a pair of electric motors 41 and an elastic element 42 (such as a loosening belt, etc.). At the same time, the power supply unit is also needed to ensure the normal use of motor and temperature induction units. Worried that the addition of the motor and battery will make the scarf too heavy, we connect multiple elastic elements to the same pair of electric motors and place the battery and motor at both ends of the scarf body to avoid excessive weight of the smart scarf. 

Since it is a smart wearable device, of course, it can also be connected to the mobile phone through Bluetooth and WIFI wireless modules, and parameters such as heating and tightness can be controlled by a dedicated mobile phone APP.

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