New-generation human body motion sensors for wearable electronics and intelligent medicine are required to comply with stringent requirements in terms of ultralight weight, flexibility, stability, biocompatibility, and extreme precision. However, conventional sensors are hard to fulfill all these criteria due to their rigid structure, high-density sensing materials used as the constituents, as well as hermetical and compact assembly strategy. Here, we report an ultralight sensing material based on radial anisotropic porous silver fiber (RAPSF), which has been manufactured by phase separation and temperature-controlled grain growth strategy on a modified blow-spinning system. The resistance of RAPSF could be dynamically adjusted depending on the deflected shape. Furthermore, an all-fiber motion sensor (AFMS) with an ultra-low density of 68.70 mg cm⁻³ and an overall weigh of 7.95 mg was fabricated via layer-by-layer assembly. The sensor exhibited outstanding flexibility, breathability, biocompatibility, and remarkable body motion recognition ability. Moreover, the AFMS was shown to have great potential as an artificial intelligence throat sensor for throat state identification at the accuracy above 85%, allowing one to spot the early onset of the viral throat illness.

用于可穿戴电子和智能医学的新一代人体运动传感器需要在超轻量、柔韧性、稳定性、生物相容性和极高精度方面满足严格的要求。然而，传统传感器由于其刚性结构、用作成分的高密度传感材料以及密封和紧凑的组装策略，很难满足所有这些标准。在这里，我们报告了一种基于径向各向异性多孔银纤维 (RAPSF) 的超轻传感材料，该材料是在改进的吹纺系统上通过相分离和温度控制的晶粒生长策略制造的。RAPSF 的阻力可以根据偏转形状进行动态调整。此外，具有 68.70 mg cm 超低密度的全光纤运动传感器 (AFMS)^-3和 7.95 mg 的总重量是通过逐层组装制造的。该传感器表现出出色的柔韧性、透气性、生物相容性和卓越的身体运动识别能力。此外，AFMS 被证明具有作为人工智能咽喉传感器的巨大潜力，用于识别咽喉状态，准确率超过 85%，可以发现病毒性咽喉疾病的早期发病。