INCREASING THE RELIABILITY OF DEFECT DETECTION THREAD, FIBRE AND YARN

A method and algorithm for increasing the reliability of decision-making in the problem of detecting defects in extended products – threads, wires, cables, fibres, yarn, etc., based on the following principles are proposed: using several statistical criteria at the same time rather than one, developing a rule for coor-dinated decision-making based on the results of testing using several statistical criteria, implementing the testing procedure in the online mode as data are received and checked. The algorithm is a sequential test of the hypothesis about the violation of stationarity by the average level and variability of the data flow from the scanning device using simultaneously used Student, Wilcoxon, Fisher and Ansari – Bradley tests, taking into account the information already accumulated about the flow at the previous stages of testing.