Affiliations: [a] Graduate School of System Informatics, Kobe
University, Nada-ku, Kobe, Japan | [b] Polytechnic University, Sagamihara-shi, Kanagawa,
Japan | Université Laval, Canada | Tohoku University, Japan
Correspondence:
[*]
Corresponding author: Hiroyuki Nakamoto, Graduate School of
System Informatics, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501,
Japan. E-mail: [email protected]
Abstract: Non-destructive inspection is an important technique in the
maintenance of plants and factories. It is necessary to appropriately evaluate
the reliability of non-destructive inspection techniques. This study focuses on
a reliability evaluation method for nondestructive inspections. The reliability
method uses the probability of detection (POD) as a metric. A POD function is
determined based on the thicknesses, signal responses, and a decision threshold
for all pipe-wall measurements, and can be reasonably modeled by the cumulative
log normal distribution function. In this study, the POD is applied to
reliability evaluations of an electromagnetic acoustic transducer (EMAT), which
is a non-destructive inspection device. Using the results of experimental
measurements, we confirm that the POD can evaluate the reliabilities of EMATs
that have different specifications.
Keywords: Reliability evaluation, electromagnetic acoustic transducer, probability of detection, pipe-wall thickness measurement
