Flexible electronics have brought considerable benefits to healthcare advancement by their powerful functions of mimicking human skin to quantitatively transform external stimuli into electronic signals with corresponding feedback instructions. Though the energy consumption also has been significantly reduced by self-powered units such as a triboelectric nanogenerator (TENG) and a piezoelectric nanogenerator (PENG), these generators cannot precisely reflect the movement lasting time with high precision. Traditional capacitive and resistive sensors can measure the duration time of external stimuli, but they fail to be self-powered. Here, a self-powered sensor is presented based on an Al/PPy/Au generator with the ability to record the magnitude and duration time of movement without sacrificing the high stretchability. The generator rendered a direct current output accessible through a Schottky contact between polypyrrole (PPy) and an aluminum electrode and a long-time-lasting output through the mechanical relaxation phenomenon of PPy. Based on this mechanism, the sensor is capable of sensing quantitative deformation and action duration. Furthermore, the sensor can recognize pentatonic scales and movement of fingers, shedding light on low-power-consuming flexible electronics and exhibiting promising applications in versatile sensory systems, intelligent medical diagnostic systems, and human–machine interactive interfaces.

中文翻译：

---

可伸缩的自供电发生器，用于多功能检测

柔性电子产品具有模仿人体皮肤的强大功能，可以将外部刺激定量转换为具有相应反馈指令的电子信号，从而为医疗保健事业带来了可观的收益。尽管通过摩擦电动纳米发电机（TENG）和压电纳米发电机（PENG）等自供电单元也已大大降低了能耗，但这些发电机无法高精度地精确反映运动的持续时间。传统的电容式和电阻式传感器可以测量外部刺激的持续时间，但它们无法自供电。在此，提出了一种基于Al / PPy / Au发生器的自供电传感器，该传感器能够记录运动的幅度和持续时间，而不会牺牲高拉伸性。发电机通过聚吡咯（PPy）和铝电极之间的肖特基接触提供直流输出，并通过PPy的机械弛豫现象提供持久的输出。基于此机制，该传感器能够感应定量变形和作用持续时间。此外，该传感器可以识别五音阶和手指的运动，在低功耗的柔性电子设备上发光，并在多功能传感系统，智能医疗诊断系统和人机交互界面中显示出广阔的应用前景。该传感器能够感应定量变形和作用持续时间。此外，该传感器可以识别五音阶和手指的运动，在低功耗的柔性电子设备上发光，并在多功能传感系统，智能医疗诊断系统和人机交互界面中显示出广阔的应用前景。该传感器能够感应定量变形和作用持续时间。此外，该传感器可以识别五音阶和手指的运动，在低功耗的柔性电子设备上发光，并在多功能传感系统，智能医疗诊断系统和人机交互界面中显示出广阔的应用前景。