The resistive network model of the weft-knitted strain sensor with the plating stitch under static relaxation is studied based on the knitted loop structure and circuit principle. The prepared sensors are divided into the sensing area and the non-sensing area. The former consists of the conductive face yarn and the insulated elastic ground yarn, while the latter includes the normal face yarn and the same ground yarn. The loop of conductive face yarn not only produces length-related resistance but also causes the jamming contact resistances along the width and length direction. Besides, the elastic ground yarn has a potential impact on the contact situation of the conductive face yarn at the interlocking point, determining whether the interlocking contact resistance exists. Therefore, two resistive network models have been established accordingly. In addition to the length-related resistance, the first model focused on both the jamming and interlocking contact resistances, while the second one only dealt with the jamming contact resistance. In the case of applying voltage along the two ends of the course, the theoretical calculations of the corresponding network models were performed using a series of equivalent transformations. Finally, the correctness and usability of the two models were verified through experiments and model calculations. It was found that both models can predict that the equivalent resistance increases with the conductive wale number and decreases with the conductive course number. It was implied that the first model’s calculating resistances are closer to the experimental data and lower than those of the second model. The difference in the calculating resistances of the two models would become smaller as the course number increases. Thus, the investigation indicates that the jamming contact resistance has a more considerable influence on the resistive network than the interlocking contact resistance.

中文翻译：

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带电镀针脚的纬编应变传感器的电阻网络模型-第 1 部分：静态松弛下的电阻网络模型

基于针织线圈结构和电路原理，研究了静态松弛条件下镀层纬编应变传感器的电阻网络模型。准备好的传感器分为感应区和非感应区。前者由导电面纱和绝缘弹性地纱组成，后者包括普通面纱和同种地纱。导电面纱的环圈不仅会产生与长度相关的电阻，还会产生沿宽度和长度方向的阻塞接触电阻。此外，弹性地纱对导电面纱在互锁点的接触情况有潜在影响，决定是否存在互锁接触电阻。因此，相应地建立了两个电阻网络模型。除了与长度相关的电阻外，第一个模型同时关注干扰和联锁接触电阻，而第二个模型只处理干扰接触电阻。在沿课程两端施加电压的情况下，使用一系列等效变换进行相应网络模型的理论计算。最后通过实验和模型计算验证了两种模型的正确性和可用性。发现两种模型都可以预测等效电阻随着导电列数的增加而增加，并随着导电层数的增加而减小。这暗示第一个模型的计算电阻更接近实验数据并且低于第二个模型的计算电阻。随着课程数量的增加，两种模型的计算阻力差异会越来越小。因此，调查表明，与互锁接触电阻相比，干扰接触电阻对电阻网络的影响更大。