Abstract
In recent years, wearable sensors have received great attention due to their wide applications in people’s daily life, such as human health monitoring and personalized healthcare. Wearable sensor devices have achieved some successful applications, including monitoring arterial pulse, heartbeat, blood pressure, respiration, and body motion. However, the common obstacle of these wearable sensor devices is that they must be powered by batteries, which greatly limit their portability and sustainability. Therefore it’s highly desirable to develop self-powered wearable sensor devices that can scavenge mechanical energy from human motions to meet their energy needs. To utilize this kind of mechanical energy, various nanogenerators based on the principle of piezoelectric effect and triboelectric effect were developed for converting mechanical energy into electric energy [1, 2]. Due to the output signal coming from the nanogenerators itself, it can be applied in the wearable electronics to service as self-powered sensors without external battery supply, which is the unique advantage of nanogenerators [3–5]. By acquiring and analyzing the electrical signal generated by nanogenerator-based wearable sensors, various applications related to the human body itself can be realized. This chapter particularly deals with the nanogenerators in wearable sensors for the applications in pulse monitoring, heartbeat monitoring, respiration monitoring, and body motion monitoring.
Published Version
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