Optical slub catcher, particularly suitable for openend process

Details Optical slub catcher, particularly suitable for openend process Optical slub catcher, particularly suitable for openend process

1988-12-19

1990-05-08

MacDonald, Allen

Boots, shoes, and leggings

28227, 57264, 73160, 242 36, 250572, 250563, 340677, 356238, 356385, 356430, G01B 1100

Patent

active

049244060

ABSTRACT:
An optical slub catcher, particularly suitable for open-end process weaving machines, comprises a special optical head for the measurement of yarn diameter, the analog signal of which is cleaned of the disturbances due to ambient light. This analog signal is furthermore normalized by an original compensating and normalizing unit, and is then digitized. The slub catcher of the present invention is also provided with the following: a detector unit for the detection of Moire defects, a detector unit for the detection of the % VC irregularities, and a unit for spectrogram processing.
In addition, the slub catcher of the present invention compensates for dirt build-up, thermal drifts, and aging of the optical head which affect the performance of the slub catchers of the prior art.

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