Where you are: Home pageYear 2009Issue (72) → Article:
AAA     ENG | POL

Yarn Irregularity Parameterisation Using Optical Sensors

Research and development

Authors:

Download... PDF
Full text

Abstract:

This paper presents an original system to measure yarn diameter using coherent optical signal processing to eliminate the influence of hairiness over the output signal. The system consists of optical hardware to produce an image which characterises the yarn diameter and electronic hardware that converts the optical yarn diameter image into a proportional voltage. LabVIEW customised software was used to acquire and process the output voltage interfaced through a Data Acquisition Board. The system determines traditional commercial yarn irregularity parameters including Ud (Mean Deviation), CVd (Coefficient of Variation), SDd (Standard Deviation), types of irregularities, frequency diagrams and spectral analysis based on FFT (Fast Fourier Transform). Moreover, several other parameters were also obtained, such as DRd (Deviation Rate), IDRd (Integral Deviation Rate), spectral analysis based on FWHT (Fast Walsh Hadamard Transform) and FDFI (Fast Impulse Frequency Determination), and length of irregularities classified for an overall variation range. A parameterisation comparison between two yarns is presented.—Ů

Tags: diameter measurement, yarn parameterisation, optical sensors, signal processing.r

Citation: Carvalho V., Cardoso P., Belsley M., Vasconcelos R. M., Soares F. O.; Yarn Irregularity Parameterisation Using Optical Sensors. FIBRES & TEXTILES in Eastern Europe, January/March 2009, Vol. 17, No. 1 (72) pp. 26-32.

Published in issue no 1 (72) / 2009, pages 26–32.

CONTACT:

FIBRES & TEXTILES
in Eastern Europe
ul. Skłodowskiej-Curie 19/27,
90-570 Łódź, Poland
tel. (48-42) 638-03-14
e-mail: infor@ibwch.lodz.pl
ftee@ibwch.lukasiewicz.gov.pl
Events:

EDITORIAL OFFICE
FIBRES & TEXTILES in Eastern Europe 19/27 M. Skłodowskiej-Curie Str., 90-570 Łódź, Poland e-mail: infor@lit.lukasiewicz.gov.pl; ftee@lit.lukasiewicz.gov.pl

EDITORIAL DEPARTMENT
Editor-in-Chief Dariusz Wawro, Head of Editorial Office Janusz Kazimierczak, Text Editor Geoffrey Large, Assistant Editor Anna WahlProduction Łukasiewicz-ŁIT

facebook