THREAD INSPECTION METHOD, THREAD INSPECTION DEVICE, THREAD PRODUCTION METHOD, THREAD PACKAGE AND THREAD MODULE

WIPO Patent Application WO/2014/054528

A1

Provided is a thread inspection method, wherein in a thread production process for producing a thread traveling continuously in a longitudinal direction, an image of the traveling thread is captured, and the total length of the traveling thread is inspected at high speed from obtained image data to thereby obtain information relating to a thread defect without falsely recognizing a case where the thread is merely shaking or a case where the thread is merely traveling obliquely as a thread defect. This thread inspection method is characterized in that an image of a traveling thread is captured by an image capturing means, and image data obtained by the image capturing means is subjected to data processing by a data processing means, the data processing comprising: (a) a step for calculating a plurality of thread widths in a predetermined section in a traveling direction from the image data relating to the traveling thread; (b) a step for calculating a variation in thread width from the plurality of thread widths; and (c) a step for comparing the variation in thread width with a first threshold value.

UCHINO MAKOTO (JP)
KURAMATA OSAMU (JP)
MINAKI NAO (JP)

PCT/JP2013/076253

April 10, 2014

September 27, 2013

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TORAY INDUSTRIES (JP)

G01N21/892; D06H3/08; G01B11/04

WO2010067720A1	2010-06-17
WO2012039298A1	2012-03-29

JP2005299037A	2005-10-27
JPH09510008A	1997-10-07
JPH03229106A	1991-10-11
JPH02221427A	1990-09-04
JP2011053173A	2011-03-17
JP2012092477A	2012-05-17

Seiryu Patent Professional Corporation et al. (JP)
Clear stream international patent business corporation (JP)

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