Method and device for optical yarn quality monitoring
OwnerPetr PERNER, Ondrej ZELINKA +1inventors
InventorsPetr PERNER, Ondrej ZELINKA, Josef SUSKA
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Abstract
The invention relates to a method and apparatus for monitoring yarn quality in the textile industry. Textile yarn is checked for quality to meet the required criteria such as diameter evenness and unwanted foreign fiber presence. The invention utilizes an artificial light illuminating the yarn, focusing element, diffraction element and the image sensor for capturing of focused diffracted rays from illuminated yarn image. The presence of foreign fibres in yarn and yarn diameter is determined by processing of captured image.
Claims18
An yarn quality monitoring device, comprising:
- a primary light source for illuminating the yarn;
- an image sensor illuminated by light from primary light source light reflected from the yarn and propagating along an optical path to the image sensor, the image sensor for capturing an image data;
- a focusing element in the optical path between yarn and image sensor, for focusing the reflected light on the image sensor;
- a diffraction element in the optical path between yarn and image sensor, for diffraction of primary light source light reflected from the yarn;
- and
- a controller for processing the image data to obtain color analysis of yarn and yarn diameter.
A method of yarn quality monitoring comprising:
- illuminating a moving yarn by a primary light source configured for creating an interference pattern on an image sensor, the primary light source light reflected from the yarn and diffracted by a diffraction element and focused by focussing element on the image sensor, the diffraction element and focusing element aligned to define an optical path along which the primary light source light propagated when reflected off moving yarn;
- obtaining an interference pattern by the image sensor;
- and
- processing the interference pattern to obtain color analysis of the yarn.
Dependencies are inferred from the claim text.