Testing method for yarn evenness

Abstract

The invention relates to the field of conductive yarn, in particular to a testing method for yarn evenness. The method comprises the following steps: firstly, pulling out conductive yarn to be testedto a yarn evenness testing device, and then connecting the conductive yarn to an electrode system; then connecting the electrode system to a data collection system which collects voltage or current signals corresponding to the conductive yarn and sends the voltage or current signals to a computer; finally, ensuring that the computer computes the yarn evenness of the conductive yarn according to the received voltage or current signals. The method provides a novel method for testing the yarn evenness of the conductive yarn, and has significant effect on the testing and research of evenness of the conductive yarn.

Description

technical field [0001] The invention relates to the field of conductive yarns, in particular to a method for testing evenness of evenness. Background technique [0002] The uniformity of thickness or weight of yarn, sliver or roving along the axial unit length is called evenness. [0003] Generally, the methods for testing yarn dryness and evenness in the prior art mainly contain the following aspects: the first, cut weighing method, the fiber is cut and weighed to measure the yarn unit length or the method of the weight of the specified length to test the yarn quality The uniformity of the yarn, the second, the capacitance method, is to use parallel plates to measure the change of the capacitance of the yarn to indirectly reflect the uniformity of the yarn thickness; the third, the illumination method, using parallel light to shine on the surface of the yarn, The shape and area of ​​the shadow formed by the shade of the yarn is measured by a photosensitive device to indire...

AI Technical Summary

Problems solved by technology

The above three methods are applicable to various types of yarns. The cutting and weighing method is less efficient and more complicated than the capacitance method and the light method because the fiber needs to be cut and weighed.

The moisture and impurities in the yarn in the capacitance method have a great influence on the measurement during the test process. To obtain higher precision by the illumination method, the size of the ccd photosensitive element is already relatively high, so the cost of the equipment is high.

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