Conductive chromotropic fiber filament sensors with ultrahigh stretchability for wearable sensing textiles toward 3D optical motion capture,Journal of Materials Chemistry A

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Conductive chromotropic fiber filament sensors with ultrahigh stretchability for wearable sensing textiles toward 3D optical motion capture
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2023-04-01 , DOI: 10.1039/d3ta01359f
Yufei Guo ₁ , Yongshi Guo ₁ , Jiawei Wu ₁ , Liying Wei ₁ , Shuhui Xia ₁ , Chuang Zhu ₁ , Jianhua Yan ₁

Affiliation

Wearable strain sensors have received increasing attention on account of their exciting applications in monitoring human movements. However, such conventional devices face the dilemma of low stretchability and inefficient 3D spatio-temporal motion detection. Here, novel Joule-thermochromic Ecoflex fiber filaments with ultrahigh stretchability are fabricated at the meter-scale via an improved wet-spinning technique, which exhibit fascinating properties including a wide sensing range (up to 210%), high sensitivity (gauge factor of 61 within strain 100–200%), fast resistance response time (≈58 ms) and broad color range from pink to blue to purple in the range of the 20–30 °C gradient. Importantly, the chromotropic sensing properties remain basically unchanged after 3000 stretching (50%) cycles and 3 h of machine washing. By integrating an optical motion capture system with the thermochromic fiber filament based fabric sensors, computer vision technology can be used to mark the target, calibrate the contour and make data statistics based on the color change for detecting the 3D pathway of human movements in real time. This work provides a new route for developing stretchable chromotropic strain sensors that can track the 3D spatial–temporal motion of humans.

中文翻译：

具有超高拉伸性的导电变色纤维长丝传感器，用于可穿戴传感纺织品，实现 3D 光学运动捕捉

可穿戴应变传感器因其在监测人体运动方面的激动人心的应用而受到越来越多的关注。然而，此类传统设备面临着低伸缩性和低效的 3D 时空运动检测的困境。在这里，具有超高拉伸性的新型焦耳热致变色 Ecoflex 纤维长丝是通过以下方法在米级制造的一种改进的湿法纺丝技术，它表现出迷人的特性，包括宽传感范围（高达 210%）、高灵敏度（应变 100–200% 内的应变系数为 61）、快速电阻响应时间（≈58 毫秒）和宽色在 20–30 °C 梯度范围内从粉红色到蓝色到紫色。重要的是，在 3000 次拉伸 (50%) 循环和 3 小时机洗后，变色传感特性基本保持不变。通过将光学运动捕捉系统与基于热致变色纤维丝的织物传感器集成，利用计算机视觉技术标记目标、校准轮廓并根据颜色变化进行数据统计，实时检测人体运动的3D路径.

更新日期：2023-04-01

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