Method and arrangement for the continuous contactless measuremen

Details Method and arrangement for the continuous contactless measuremen Method and arrangement for the continuous contactless measuremen

1985-04-30

1986-05-06

Smith, Robert I.

Measuring and testing

Sheet, woven fabric or fiber

26 515, G01N 3334

Patent

active

045863725

ABSTRACT:
For the continuous contactless measurement of the shrinkage of textiles during the production process, the image of a portion of the textile surface is picked up both before and after the shrinkage and converted to analog electrical image signals by means of an image/signal transducer. The analog image signals are digitized by analog-digital converters and stored in image signal memories. A calculating unit determines from the stored digital image signals the periods of the textile structure both before and after the shrinkage in at least one evaluation direction, preferably in the longitudinal direction and in the transverse direction of the textile web. The change of length of the textile material in each evaluation direction is calculated from the ratio of the two periods determined in this direction. The method is in particular suitable for the measurement of the two-dimensional shrinkage of knitted textiles during the manufacturing process.

REFERENCES:
patent: 3554656 (1971-01-01), Eicken
patent: 3591294 (1971-07-01), Neil
patent: 3609318 (1971-09-01), Anderson
patent: 3673865 (1972-07-01), Michaelsen
patent: 3721809 (1973-03-01), Strandberg, Jr. et al.
patent: 3729635 (1973-04-01), Shottenfeld
patent: 4017722 (1977-04-01), Swanson
patent: 4031752 (1977-06-01), Sanders
patent: 4430720 (1984-02-01), Aemmer
patent: 4476717 (1984-10-01), Murphy

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