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    • 5. 发明申请
    • YARN QUALITY MONITORING (METHODS AND SYSTEMS)
    • WO2019130209A2
    • 2019-07-04
    • PCT/IB2018/060583
    • 2018-12-24
    • PERNER, PetrSUSKA, JosefZELINKA, Ondrej
    • PERNER, PetrSUSKA, JosefZELINKA, Ondrej
    • Disclosed are methods of monitoring textile yarn quality and apparatuses for monitoring textile yarn quality. Moving textile yarn 1 is monitored for its quality to meet required criteria, e.g. evenness or presence of unwanted foreign fibers. Light illuminating by light sources 2 and/or 7 and an image sensor 3 are used. The yarn 1 is placed as an obstacle into the pathway 100 of one diffused 5 light 2, contours of the light being focused 6 for a sharp yarn contours image capture. The light 7 is reflected from the yarn 1 and propagates along a path 100 to the image sensor through diffraction element 8. Portion of reflected light is diffracted 8 and creates interference pattern. Remaining reflected light creates yarn image. Thus light 2 directly illuminates image sensor. Light 7 illuminates moving yarn 1 and light from light source 7 is reflected from the yarn and illuminates image sensor. The yarn diameter is determined by processing of the yarn contours image or yarn image. The color analysis of the yarn 1 is determined by processing of captured interference patterns. Further evaluation of yarn diameters is used for yarn evenness monitoring and further color analysis results evaluation is used for foreign fibers monitoring.