Structural design and sensing performance of conductive knitted fabrics of carbon coated fibers

For developing a fabric-type sensor which has both stable sensibility and comfortability,trial fabric-type sensors were knitted with soft and conductive carbon coated fibers(CCFs),employing weft plain and rib 1 + 1 weaves.Though the repeated tensile test of the conductive knitted fabric,the relationship of resistance and elongation of the fabric was found,and its conductivity and sensitivity was analyzed.The resistance of the conductive knitted fabric decreased gradually with the increase of elongation under tension,and the fitting curve approximated the left curve of a parabola which has an upward opening.Among four conductive fabrics,the highest value of sensibility is 1.52.And with respect to the sensibility,weft plain weave is better than rib 1 + 1,and the ply yarn knit outperforms the twist yarn.The stability and stress relaxation of rib 1 + 1 are better than those of weft plain.