Rapid development in wearable electronics and systems continues to impose challenges on portable energy storage sustained over time, and thus human energy harvesting is a potentially attractive means of sustainable, long-term energy. We introduce a novel ‘controlled slip’ energy harvesting approach for capturing energy during human locomotion. While slip is normally considered undesirable, controlled slip holds potential to enable a significant amount of energy harvesting during each step of human gait. Custom-designed ‘controlled slip’ energy harvesting shoes were fabricated by mounting a sliding plate and a generator with a one-way bearing to the sole of standard walking shoes, which induces controlled forward slip during early stance while energy is harvested. Fourteen healthy subjects performed treadmill walking trials with the ‘controlled slip’ energy harvesting shoes which generated average electrical power of 1.15-1.44 W at walking speeds of 2.9-4.3 km/h. Interestingly, without prompting, subjects chose to walk with the ‘controlled slip’ energy harvesting shoes in either one of two distinct ways: landing with the heel first (heel strikers) or landing with the toe first (toe strikers). While heel strikers and toe strikers exhibited similar electrical power output and hip flexion angle at initial foot contact, heel strikers had higher peak ankle power and lower knee flexion angle at initial foot contact than toe strikers. ‘Controlled slip’ energy harvesting could potentially generate electrical power for a broad spectrum of wearable devices.

中文翻译：

---

行走时“控制滑移”能量收集

随着时间的推移，可穿戴电子产品和系统的快速发展继续对便携式能量存储提出挑战，因此，人类能量收集是可持续的长期能源的潜在有吸引力的手段。我们引入了一种新颖的“可控滑动”能量收集方法，用于在人类运动过程中捕获能量。虽然通常认为滑倒是不希望的，但受控的滑倒具有潜力，可以在人的步态的每个步骤中实现大量的能量收集。通过将滑板和带有单向轴承的发电机安装到标准步行鞋的鞋底上，可以制作定制设计的“可控滑移”能量收集鞋，这可以在收集能量时在早期站立时产生可控的向前滑移。14名健康受试者使用“可控防滑”能量收集鞋进行了跑步机步行试验，该鞋在2.9-4.3 km / h的步行速度下产生的平均电功率为1.15-1.44W。有趣的是，在没有提示的情况下，受试者选择以两种不同方式中的一种与“控制滑移”能量收集鞋一起行走：先用脚后跟着地（脚跟前锋）或先用脚趾着地（脚趾前锋）。脚后跟撞击者和脚趾撞击者在最初的脚接触时显示出相似的电功率输出和髋屈曲角度，而脚后跟撞击者在初始脚接触时具有更高的峰值踝关节力量和较低的膝盖弯曲角度。“受控滑动”能量收集可能会为广泛的可穿戴设备产生电能。