ベイズ推定による渦電流探傷法の欠陥寸法計測に関する一手法
A Method for Crack Sizing using Bayesian Inference arising in Eddy Current Testing
著者:
小島 史男 Fumio KOJIMA 菊池 光洋 Mitsuhiro KIKUCHI
発刊日:
公開日:
Conditional Based MaintenanceFinite Element MethodInverse ProblemsNondestructive Test
概要
This paper is concerned with a sizing methodology of crack using Bayesian inference arising in eddy current testing. There is often uncertainty about data through quantitative measurements of non destructive testing and this can yield misleading inference of crack sizing at on-site monitoring. In this paper, we propose optimal strategies of measurements in eddy current testing using Bayes ian prior-to-posteriori analysis. First our likelihood functional is given by Gaussian distribution with the measurement model based on the hybrid use of finite and boundary element methods. Sec ondly, given a priori distributions of crack sizing, we propose a method for estimating the region of interest for sizing cracks. Finally an optimal sensing method is demonstrated using our idea.
