Warncke Mareen N, Böhmer Carola H, Sachse Carmen, Fischer Susanne, Häntzsche Eric, Nocke Andreas, Mersch Johannes, Cherif Chokri
Institute of Textile Machinery and High Performance Material Technology, TUD Dresden University of Technology, 01069 Dresden, Germany.
Centre for Tactile Internet with Human-in-the-Loop (CeTI), TUD Dresden University of Technology, 01069 Dresden, Germany.
Polymers (Basel). 2023 Sep 29;15(19):3936. doi: 10.3390/polym15193936.
Recently, there has been remarkable progress in the development of smart textiles, especially knitted strain sensors, to achieve reliable sensor signals. Stable and reliable electro-mechanical properties of sensors are essential for using textile-based sensors in medical applications. However, the challenges associated with significant hysteresis and low gauge factor (GF) values remain for using strain sensors for motion capture. To evaluate these issues, a comprehensive investigation of the cyclic electro-mechanical properties of weft-knitted strain sensors was conducted in the present study to develop a drift-free elastic strain sensor with a robust sensor signal for motion capture for medical devices. Several variables are considered in the study, including the variation of the basic knit pattern, the incorporation of the electrically conductive yarn, and the size of the strain sensor. The effectiveness and feasibility of the developed knitted strain sensors are demonstrated through an experimental evaluation, by determining the gauge factor, its nonlinearity, hysteresis, and drift. The developed knitted piezoresistive strain sensors have a GF of 2.4, a calculated drift of 50%, 12.5% hysteresis, and 0.3% nonlinearity in parts.
最近，在智能纺织品尤其是针织应变传感器的开发方面取得了显著进展，以获得可靠的传感器信号。传感器稳定可靠的机电性能对于在医疗应用中使用基于纺织品的传感器至关重要。然而，在将应变传感器用于运动捕捉方面，与显著滞后和低应变系数（GF）值相关的挑战仍然存在。为了评估这些问题，本研究对纬编应变传感器的循环机电性能进行了全面研究，以开发一种无漂移的弹性应变传感器，该传感器具有用于医疗设备运动捕捉的强大传感器信号。该研究考虑了几个变量，包括基本针织图案的变化、导电纱线的加入以及应变传感器的尺寸。通过实验评估，通过确定应变系数、其非线性、滞后和漂移，证明了所开发的针织应变传感器的有效性和可行性。所开发的针织压阻式应变传感器的应变系数为2.4，计算得出的漂移为50%，滞后为12.5%，部分非线性为0.3%。
