Center of Advanced Elastomer Materials & Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
Small. 2018 Nov;14(44):e1803018. doi: 10.1002/smll.201803018. Epub 2018 Sep 24.
Flexible wearable pressure sensors have drawn tremendous interest for various applications in wearable healthcare monitoring, disease diagnostics, and human-machine interaction. However, the limited sensing range (<10%), low sensing sensitivity at small strains, limited mechanical stability at high strains, and complicated fabrication process restrict the extensive applications of these sensors for ultrasensitive full-range healthcare monitoring. Herein, a flexible wearable pressure sensor is presented with a hierarchically microstructured framework combining microcrack and interlocking, bioinspired by the crack-shaped mechanosensory systems of spiders and the wing-locking sensing systems of beetles. The sensor exhibits wide full-range healthcare monitoring under strain deformations of 0.2-80%, fast response/recovery time (22 ms/20 ms), high sensitivity, the ultrasensitive loading sensing of a feather (25 mg), the potential to predict the health of patients with early-stage Parkinson's disease with the imitated static tremor, and excellent reproducibility over 10 000 cycles. Meanwhile, the sensor can be assembled as smart artificial electronic skins (E-skins) for simultaneously mapping the pressure distribution and shape of touching sensing. Furthermore, it can be attached onto the legs of a smart robot and coupled to a wireless transmitter for wirelessly monitoring human-motion interactivities.
灵活可穿戴压力传感器因其在可穿戴医疗保健监测、疾病诊断和人机交互等各种应用中的巨大潜力而受到广泛关注。然而，其传感范围有限（<10%）、小应变时的传感灵敏度低、高应变时的机械稳定性有限以及复杂的制造工艺限制了这些传感器在超灵敏全范围医疗保健监测中的广泛应用。在此，受蜘蛛的裂纹形机械传感系统和甲虫的翅膀锁定传感系统的启发，提出了一种具有微裂纹和互锁结构的分层微观结构框架的灵活可穿戴压力传感器。该传感器在 0.2-80%应变变形下可实现全范围的医疗保健监测，具有快速的响应/恢复时间（22 ms/20 ms）、高灵敏度、对羽毛的超灵敏加载传感（25 mg）、模拟早期帕金森病患者的静态震颤以预测患者健康的潜力以及超过 10000 次循环的出色可重复性。同时，该传感器可组装成智能人工电子皮肤（E-skins），用于同时绘制触摸感应的压力分布和形状。此外，它可以贴在智能机器人的腿上，并与无线发射器耦合，用于无线监测人机交互活动。
