10.14489/td.2021.10.pp.004-010

2021, 10 October

DOI: 10.14489/td.2021.10.pp.004-010

Badalyan V. G.
ON ESTIMATION OF THE INFLUENCE OF THE HUMAN FACTOR ON DETECTION OF DEFECTS IN ULTRASONIC FLAW DETECTION AND DEFECTOMETRY
(pp. 4-10)

Abstract. Based on the analysis of the results of ultrasonic testing, a quantitative assessment of the influence of the human factor on the PoD curves built for independent inspectors, several (different) flaw detection techniques was obtained. It is shown that the average value of the change in the probability of detecting flaws, which determines the value of the correction coefficient equal to 0.015 for flaws with a height of 4 to 12 mm (for the defectometry technique) and 0.18 for flaws with a height of 5 to 12 mm (for flaw detection techniques). For flaws less, than 4 mm in height, the average value of the change in the probability of detecting flaws for individual inspectors depends significantly on the height of the flaw. A significant difference in the average value of the change in the probability of detecting flaws and the standard deviation during inspection by flaw detection and defectometry techniques is associated with the difference in the amount of information provided by the inspection techniques and the individual characteristics of the inspectors.

Keywords: ultrasonic flaw detection technique, ultrasonic defectometry technique, PoD-curve, flaw size, measurement error.

+ - About the Authors Click to collapse

V. G. Badalyan (Co Ltd “Scientific Production Center of Nondestructive Ultrasonic Testing “ECHO+”, Moscow, Russia) E-mail: bvg @ echoplus.ru; Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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