Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China.
School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
Biosensors (Basel). 2023 May 16;13(5):552. doi: 10.3390/bios13050552.
For outdoor workers or explorers who may be exposed to extreme or wild environments for a long time, wearable electronic devices with continuous health monitoring and personal rescue functions in emergencies could play an important role in protecting their lives. However, the limited battery capacity leads to a limited serving time, which cannot ensure normal operation anywhere and at any time. In this work, a self-powered multifunctional bracelet is proposed by integrating a hybrid energy supply module and a coupled pulse monitoring sensor with the inherent structure of the watch. The hybrid energy supply module can harvest rotational kinetic energy and elastic potential energy from the watch strap swinging simultaneously, generating a voltage of 69 V and a current of 87 mA. Meanwhile, with a statically indeterminate structure design and the coupling of triboelectric and piezoelectric nanogenerators, the bracelet enables stable pulse signal monitoring during movement with a strong anti-interference ability. With the assistance of functional electronic components, the pulse signal and position information of the wearer can be transmitted wirelessly in real-time, and the rescue light and illuminating light can be driven directly by flipping the watch strap slightly. The universal compact design, efficient energy conversion, and stable physiological monitoring demonstrate the wide application prospects of the self-powered multifunctional bracelet.
对于可能长时间暴露在极端或野外环境中的户外工作者或探险家来说，具有连续健康监测和紧急情况下个人救援功能的可穿戴电子设备在保护他们的生命方面可能发挥着重要作用。然而，有限的电池容量导致其使用时间有限，无法保证随时随地都能正常运行。在这项工作中，通过将混合能源供应模块和耦合脉冲监测传感器与手表的固有结构集成，提出了一种自供电多功能手链。混合能源供应模块可以同时从表带的摆动中收集旋转动能和弹性势能，产生 69V 的电压和 87mA 的电流。同时，通过静态不定结构设计和摩擦电和压电纳米发电机的耦合，手链在运动过程中能够进行稳定的脉搏信号监测，具有较强的抗干扰能力。借助功能电子元件，佩戴者的脉搏信号和位置信息可以被实时无线传输，只需轻轻翻转表带即可直接驱动救援灯和照明灯。这种通用的紧凑型设计、高效的能量转换和稳定的生理监测展示了自供电多功能手链的广泛应用前景。
