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Generally, many previous researches conducted using FBG sensors were based on the assumption that the coefficient of thermal expansion (CTE) and the thermo-optic coefficient (TOC) of FBG sensors are constants. However, they should be considered variables for higher accuracy when FBG sensors are applied to circumstances with temperature changes. In this paper, CTE and TOC of FBG sensors were precisely...
Pipes in facilities contain lots of welding zones and requires automated ultrasonic inspection. An electromagnetic acoustic transducer (EMAT) can be usefully applied in an automated ultrasonic inspection system. In this study, shear horizontal waves (SH-waves) generated by EMAT were implemented for the inspection of pipe welding zones. In analyzing of SH-EMAT signals, wavelet transforms were useful...
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