Yarn measuring device

Details Yarn measuring device Yarn measuring device

1995-09-21

1997-03-25

Rosenberger, Richard A.

Optics: measuring and testing

By monitoring of webs or thread

356384, 356238, G01B 1110

Patent

active

056150148

ABSTRACT:
A device is provided whereby, when measuring yarn which has hairs, it is possible to detect data for the hairy part and data for the core part individually. The yarn measuring device is provided with a means which forms a Fourier transformation pattern, including a yarn core part pattern and a surface projection pattern, on a spectrum plane, by performing a Fourier transformation on diffracted laser light which has intersected and passed through traveling yarn; a first light detecting means which receives only one of the core part pattern and the surface projection pattern; and a second light detecting means which receives only the other pattern.

REFERENCES:
patent: 3709610 (1973-01-01), Kruegle
patent: 4948260 (1990-08-01), Felix et al.
Nichols, R.H. "Dynamic Wire Measurements by new inspection Techniques", Technical Notes and Research Briefs, The Journal of the Acoustical Society of America, vol. 46, No. 2(Part 1) 1969 (no month) pp. 314-315.

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