The Research Of Testing System Of Evenness

Evenness of the gauze is one of the classical, effective and important indicators to measure axial uneven thickness and control the yarn quality. With the rapidly development of computer language, network technology and modern measurement technology, a new type of advanced equipment software -LabVIEW becomes the most popular software in the study of test system now. It makes full use of digital processing techniques to achieve the quality of yarn testing, with advantages of accuracy and quantifying indicators.This article shows s method of dealing with the uneven thickness of yarn by using computer graphic language processing and analysis technology. It is based on the capacitance of the stem to test circuits and data acquisition card (PCI-6024E DAQ card), which uses National Instruments company' s virtual instrument "LabVIEW8.0 graphic language". Constructing the experimental platform to achieve the gauze uneven degrees of automatic measurement, as well as acquisiting sensor parameters continually. It combines LabSQL construction to access the database to achieve data processing and searching ect. It establishes a visual good and friendly man-machine interface of the evenness of the test system, which uses the virtual instrument design ideas to enriches the function of the collection system at the host computer' s analysis processing. It also makes full use of the advantages of the low-cost, high efficiency of the virtual instruments, improves integration of the system and shortens the development cycle. Moreover it has a certain value for achieving automatic test of the yarn' s quality, as well as a it has a great importance in improving the quality of the yarns.