Reliability Assessment for Electromagnetic Acoustic Resonance (EMAR) and Pulse-EMAR Methods by Statistical
Reliability Assessment for Electromagnetic Acoustic Resonance (EMAR) and Pulse-EMAR Methods by Statistical
著者:
Shuxiao XIE Ryoichi URAYAMA Tetsuya UCHIMOTO Toshiyuki TAKAGI
発刊日:
公開日:
electromagnetic acoustic resonancenondestructive testingpipe wall thinningstatistical analysis
概要
Abstract: This study proposes a reliability assessment method for two pipe wall thickness inspection techniques, the electromagnetic acoustic resonance (EMAR) and pulse-EMAR methods, using statistical analysis. The statistical analysis uses an EMAR technique with a signal processing method called the superposition of nth compression (SNC) method, which is used to calculate the normalized SNC peak value, and is concerned with the difference between the thicknesses obtained by the EMAR method and the real values. A generalized linear model (GLM) using the logistic link function overcomes the difficulties that use of ordinary linear models would cause. Finally, we build a logistic model to compare the transformed probabilities and determine the inspection method that offers higher reliability.