The evaluation of the uncertainty of the research method on the geometrical parameters of the embroidery elements

• Published in: Journal of the Textile Institute 2019-08, Vol.110 (8), p.1202-1209
• Main Authors: Juchneviciene, Zaneta, Meskuotiene, Asta, Juciene, Milda, Dobilaite, Vaida, Saceviciene, Virginija
• Format: Article
• Language: English
• Subjects: Contours; Data processing; Deformation; Digital imaging; embroidery element; errors; fabric characteristics; image processing; Mathematical analysis; Needlework; Parameter uncertainty; Random errors; Reliability; Sewing; Shape; Test procedures; Uncertainty
• ISSN: 0040-5000; 1754-2340
• DOI: 10.1080/00405000.2018.1552423

The indirect measurement method of the contour width deformation of the embroidery element is presented in the work. The square-shaped, directly measured, embroidery element is compared to its digital image. Together with the used test methods steps, the reliability criteria for this method are presented as well. The reliability of the method of measuring the geometrical parameters of a closed contour element of an embroidered square shape is evaluated by analyzing its systematic and random errors and by calculating the total standard uncertainty. In assessing the accuracy of the measurement method, there is also a talk about a comprehensive assessment of measurement uncertainty. Measurement uncertainties are considered to be one of the most important parameters of the ability of a method to determine the possibilities of using and applying the method. When measuring the parameters of real samples, the components of total uncertainty related to the characteristics of the specimen (weave, surface density, filling characteristics, direction of the fabric yarn), their variation within certain limits and possible correlation among these components, influence of the standard means, data processing, digital image calibration were evaluated. It has been determined during the research that a negative error ∼2.4% with expanded uncertainty ∼3.3% complying with the requirements of the reliability of the method is typical for the deformation measurement method applied for the measurement of the five (6, 10, 14, 18, and 22 mm) elements of different contour widths. Because of that the evaluation of the uncertainty according its components is useful while analyzing the factors which have an impact on the deformation.