DEVICES AND METHODS FOR YARN QUALITY MONITORING

Title:

DEVICES AND METHODS FOR YARN QUALITY MONITORING

Document Type and Number:

WIPO Patent Application WO/2019/130209

Kind Code:

A3

Abstract:

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.

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Inventors:

PERNER PETR (CZ)
SUSKA JOSEF (CZ)
ZELINKA ONDREJ (CZ)

Application Number:

PCT/IB2018/060583

Publication Date:

August 08, 2019

Filing Date:

December 24, 2018

Export Citation:

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Assignee:

PERNER PETR (CZ)
SUSKA JOSEF (CZ)
ZELINKA ONDREJ (CZ)

International Classes:

G01N21/89; B65H63/06; D01H13/32; G01B11/10; G01N33/36

Domestic Patent References:

WO2011147385A2	2011-12-01
WO2007025350A1	2007-03-08

Foreign References:

CH706948A2	2014-03-31
DE19818069A1	1999-10-28
EP1873105A2	2008-01-02
EP1143236A2	2001-10-10
US5414520A	1995-05-09
EP1643246A1	2006-04-05

Attorney, Agent or Firm:

LEONHARD & PARTNER PATENTANWAELTE (DE)

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