Based on the static resistive network investigated in Part 1 of this series, the resistive network model of the weft-knitted strain sensor with the plating stitch is explored under the elongation along course direction, and it changes with the conductive loops’ configuration and contact situation. Since the voltage is applied at both ends of the course, under a specific stretching state, the resistive network model can be reduced to a resistance network connected in series in the course direction and parallel in the wale direction, which determines that the sensor’s equivalent resistance increases with the growth of the conductive wale number, and decreases with the raise of the conductive course number. Through experiment and model calculation, it can be obtained that in the initial stage of stretching, the contact resistances’ changes are the main factors affecting the mechanical–electrical performance of the sensor. Then as the sensor is further stretched, the length-related resistances of the conductive yarn segments begin to affect the sensor’s properties due to yarns’ slippage and self-elongation. In addition, the weft jacquard plating technology makes the strain of the sensor reach about 32% before yarns’ slippage and self-elongation, which expands the sensor’s measurable strain range, and avoids irreversible deformation of the sensor after repeated use in this range. It can be verified that the sensor’s gauge factor can be improved by reducing the conductive course number and increasing the conductive wale number. It should be noted that the ground yarn will reduce the gauge factor of the sensor during stretching, so it is necessary to choose a ground yarn with a smaller fineness than the conductive face yarn and good elasticity in practical.

中文翻译：

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带镀层针迹的纬编应变传感器的电阻网络模型-第 2 部分：沿横列方向伸长期间的电阻网络模型

在本系列第 1 部分研究的静态电阻网络的基础上，探索了带镀层针脚的纬编应变传感器的电阻网络模型在沿横列方向的伸长下，并随着导电回路的配置和接触情况而变化. 由于线路两端都施加电压，在特定的拉伸状态下，电阻网络模型可以简化为线路方向串联、纵行方向并联的电阻网络，这决定了传感器的等效电阻随着导电层数的增加而增加，随着导电层数的增加而减少。通过实验和模型计算可以得出，在拉伸的初始阶段，接触电阻的变化是影响传感器机电性能的主要因素。然后，随着传感器进一步拉伸，由于纱线的滑动和自伸长，导电纱线段的长度相关电阻开始影响传感器的特性。此外，镀纬提花技术使传感器在纱线滑脱和自伸长前应变达到32%左右，扩大了传感器的可测量应变范围，避免传感器在该范围内重复使用后发生不可逆变形。可以验证通过减少导电层数和增加导电列数可以提高传感器的应变系数。需要注意的是，地纱在拉伸过程中会降低传感器的粗细系数，