Wearable tensile strain sensors have attracted substantial research interest due to their great potential in applications for the real-time detection of human motion and health through the construction of body-sensing networks. Conventional devices, however, are constantly demonstrated in non-real world scenarios, where changes in body temperature and humidity are ignored, which results in questionable sensing accuracy and reliability in practical applications. In this work, a fabric-like strain sensor is developed by fabricating graphene-modified Calotropis gigantea yarn and elastic yarn (i.e. Spandex) into an independently crossed structure, enabling the sensor with tunable sensitivity by directly altering the sensor width. The sensor possesses excellent breathability, allowing water vapor generated by body skin to be discharged into the environment (the water evaporation rate is approximately 2.03 kg m⁻² h⁻¹) and creating a pleasing microenvironment between the sensor and the skin by avoiding the hindering of perspiration release. More importantly, the sensor is shown to have a sensing stability towards changes in temperature and humidity, implementing sensing reliability against complex and changeable wearable microclimate. By wearing the sensor at various locations of the human body, a full-range body area sensing network for monitoring various body movements and vital signs, such as speaking, coughing, breathing and walking, is successfully demonstrated. It provides a new route for achieving wearing-comfortable, high-performance and sensing-reliable strain sensors.

Graphical Abstract

中文翻译：

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基于纤维的 Calotropis gigantea 灵敏度可调应变传感器，对可穿戴微气候变化反应不灵敏

可穿戴拉伸应变传感器由于其在通过构建身体传感网络实时检测人体运动和健康方面的巨大应用潜力而引起了广泛的研究兴趣。然而，传统设备不断在非现实场景中进行演示，忽略了人体温度和湿度的变化，导致实际应用中的传感精度和可靠性存在问题。在这项工作中，通过制造石墨烯修饰的Calotropis gigantea开发了一种类似织物的应变传感器纱线和弹性纱线（即氨纶）成独立交叉结构，通过直接改变传感器宽度使传感器具有可调灵敏度。传感器具有优良的透气性，可以将人体皮肤产生的水蒸气排放到环境中（水分蒸发率约为2.03 kg m ⁻²  h ⁻¹) 并通过避免阻碍排汗释放在传感器和皮肤之间创造令人愉悦的微环境。更重要的是，该传感器被证明对温度和湿度的变化具有传感稳定性，实现了针对复杂多变的可穿戴微气候的传感可靠性。通过将传感器佩戴在人体的各个位置，成功演示了一个全方位的身体区域感知网络，用于监测说话、咳嗽、呼吸和行走等各种身体运动和生命体征。它为实现佩戴舒适、高性能和传感可靠的应变传感器提供了一条新途径。

图形概要