Evaluation on the uncertainty in the measurement of the cotton grey yarn breaking force
In order to accurately characterize the true value range of the breaking force of the cotton grey yarn,the breaking force was tested according to GB/T 3916-2013"Textiles-Yarns from packages-Determination of single-end breaking force and elonga-tion at break using constant rate of extension(CRE)tester".The measurement uncertainty of the cotton grey yam's breaking force was analyzed and quantified by mathematical statistical methods.The combined uncertainty was quantitatively analyzed,and then the expended uncertainty was calculated.The results indicate that the sources of uncertainty in the breaking force of cotton grey yam mainly include random effects,the metrological performance of the measuring instrument,pre-tensioning,and the rounding off of numerical values.The expanded uncertainty of the measured results is(2.1×102±8)cN,k=2.The uncertainty evaluation in this study can serve as a reference for the uncertainty evaluation of other types of single yarn breaking force measurements.
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