System and method for determining yarn hairiness

Details System and method for determining yarn hairiness System and method for determining yarn hairiness

1995-11-13

1999-02-23

Voeltz, Emanuel Todd

Data processing: measuring, calibrating, or testing

Measurement system

Dimensional determination

702155, 36447014, 36447015, 356384, 25055901, 25055912, 25055919, G01N 2100

Patent

active

058754199

ABSTRACT:
A computer-controlled device for determining relative yarn hairiness. Yarn is moved past a light source to create a yarn shadow, and an imaging device captures the yarn shadow. The imaging device includes a number of separate, closely-spaced light sensing elements, each with an output level related to the amount of light shining on the element. A selected sensing element output level is established as indicative that an element is blocked by the yarn. The width of a number of closely-spaced portions of the yarn is determined, at two different selected sensing elements output levels, to distinguish the yarn hairs from the yarn core.

REFERENCES:
patent: 4887155 (1989-12-01), Massen
patent: 5319578 (1994-06-01), Lawson et al.
patent: 5570188 (1996-10-01), Nevel et al.

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