Abstract Various human motions yield stimuli from low-pressure (0-10 kPa) to high-pressure level (100-300 kPa). However, previous flexible pressure sensors are unable to detect various human motions from low to high-pressure stimuli, thus are unfavorable for the facile and integrated design of sensing system. Herein a novel flexible pressure sensor with a tunable and large pressure-detecting range is produced by simply infusing magnetic carboxyl iron particle (CIP)/silicone resin into carbon sponge (CS). Attributed to the magnetorheological effect, the upper pressure-detecting limit of the CS/CIP/silicone sensor in a frequency of 0.01-5 Hz is significantly increased from 180 to 330 kPa in the presence of magnetic field, while a lower pressure-detecting limit of 70 Pa is obtained in the absence of magnetic field, thus covering the whole pressure-detecting range for various human activities. The CS/CIP/silicone sensor in monitoring various human motions with low to high-pressure stimuli is demonstrated by recording breathing, arm movement, walking, lifting and grasping, consecutively. Characterized by high flexibility, low cost and easy manufacturing, the current strategy is highly provoking for the development of pressure sensors adapted to human motions of different pressure levels in a wide range.

中文翻译：

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具有可调压力检测范围的灵活压力传感器，适用于各种人体运动

摘要 各种人体运动会产生从低压 (0-10 kPa) 到高压 (100-300 kPa) 的刺激。然而，以往的柔性压力传感器无法检测从低压到高压刺激的各种人体动作，不利于传感系统的简易化和集成化设计。在这里，通过简单地将磁性羧基铁颗粒（CIP）/硅树脂注入碳海绵（CS）中，生产出一种新型柔性压力传感器，其具有可调且大的压力检测范围。归因于磁流变效应，CS/CIP/硅胶传感器在0.01-5Hz频率下的压力检测上限在磁场存在下从180kPa显着增加到330kPa，而压力检测下限在没有磁场的情况下获得 70 Pa，从而覆盖各种人类活动的整个压力检测范围。CS/CIP/硅胶传感器通过连续记录呼吸、手臂运动、行走、抬起和抓握来监控各种人体运动，包括低压到高压刺激。目前的战略具有高度灵活性、低成本和易于制造的特点，对于开发适用于各种不同压力水平的人体运动的压力传感器非常具有启发性。