针织物柔性传感器的传感性能探讨

Investigation on the Sensing Properties of Knitted Flexible Sensor

以镀银锦纶导电纱线作为面纱的添纱组织,制备了针织物柔性传感器试样。采用定伸长拉伸及储存式万用电表同步记录试样的电阻变化。研究了传感器的电阻与应变的关系及反复拉伸电阻的重复性。试验结果表明对于传感区域来说,在横列数相同的情况下,电阻随纵行数的增加而线性增加;在纵行数相同的情况下,电阻随横列数的减少而线性增加,电阻与应变的拟合曲线斜率也具有同样的规律。针织物柔性传感器的线性度、灵敏度和重复性能够满足作为传感器的要求。

The knitted flexible sensors samples were prepared with sliver-plated conductive fiber used as the face yarn of plating stitch. The relationship between strain and resistance of the sensors and the repeatability of resistance were investigated by tensile test of fixed-extension and digital multimeter recording resistance. The test results showed that the resistances of sensing area increased linearly as rise of wale number under the same course number, and the fitting curves of strain-resistance had the same trend. The knitted flexible sensor could meet the demands of the linearity, sensitivity and the repeatability as a sensor.