Method for detecting periodic defects in a test material moved l

Details Method for detecting periodic defects in a test material moved l Method for detecting periodic defects in a test material moved l

1998-12-07

2000-05-16

Raevis, Robert

Measuring and testing

Sheet, woven fabric or fiber

Filament

G01N 2700

Patent

active

060620749

ABSTRACT:
The invention relates to a method and apparatus for detecting periodic defects in a test material moved longitudinally. In order to enable periodic defects in elongate test material moved longitudinally to be continuously detected with little expenditure, at least two measurements of a parameter which follow one another at a comparatively short interval (W/2) are to be carried out at time intervals (T1, T2 , T3).

REFERENCES:
patent: 4058962 (1977-11-01), Spescha et al.
patent: 4152931 (1979-05-01), Mannhart
patent: 4982600 (1991-01-01), Kiso et al.
patent: 5592849 (1997-01-01), Nakade et al.

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