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Smart pillow

08.06.2022

Chinese scientists have developed a self-powered "smart" pillow that will better understand the causes of lack of sleep, as well as track patients with diseases that affect head movement.

Research has linked chronic sleep deprivation to diseases such as diabetes and heart disease, as well as mental health problems. People who want to better understand what happens to them at night can take a sleep test at a medical institution, or use an application for a smartphone or smart watch. As a more accurate alternative to the second method, scientists are developing new sleep monitoring systems using triboelectric nanogenerators (TENG) - a constant current source. These self-contained systems have already taken the form of eye masks, belts, patches and even sheets. And now the shape of the pillow.

To design a new "smart" pillow, the researchers developed a flexible porous polymer triboelectric layer. Movement between the head and this layer changes the electric field around nearby electrodes, generating a current. They connected several of these self-powered sensors to create a flexible and breathable array that can be placed on a regular pillow. This system could generate a voltage corresponding to the amount of pressure applied and could track the movement of a finger as it traced letters. It can also record the distribution of head pressure on the pillow when changing position.

The development can be used for more than just sleep tracking. For example, the system could track patients with diseases that affect head movement, such as degenerative neck disease, cervical spondylosis.

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