Experimental investigation of the nonlinear interaction between optical guided waves and magnetostatic forward volume waves in a Bi-YIG film

1998 ◽  
Vol 34 (4) ◽  
pp. 1399-1401 ◽  
Author(s):  
J. Kurumida ◽  
N.S. Chang
Keyword(s):  
Experimental Investigation ◽  
Nonlinear Interaction ◽  
Guided Waves

Theoretical and Experimental Investigation of Pipe Wall Thinning Detection Using Guided Waves

2008 ◽  
Author(s):  
Isoharu Nishiguchi ◽  
Fumitoshi Sakata ◽  
Seiichi Hamada
Keyword(s):  
Experimental Data ◽  
Power Generation ◽  
Experimental Investigation ◽  
Reflection Coefficient ◽  
Guided Waves ◽  
Pipe Wall ◽  
Thermal Power ◽  
Wall Thinning ◽  
Torsional Waves ◽  
Simplified Method

A method to investigate pipe wall thinning using guided waves has been developed for pipes in thermal power generation facilities. In this paper, the reflection coefficient and the transmission coefficient are derived for the torsional waves which propagate along a pipe and a simplified method to predict the waveform is proposed. The predictions of the waveforms by the FEM and a simplified method based on the reflection of torsional waves are also examined by comparing with experimental data.

Guided Waves Measurement Techniques in Pitch-Catch Configuration

2020 ◽  
Author(s):  
Francesco Cordella ◽  
Francesco Bertoncini ◽  
Mauro Cappelli
Keyword(s):  
Experimental Investigation ◽  
Theoretical Analysis ◽  
Experimental Method ◽  
Long Range ◽  
Guided Waves ◽  
Measurement Techniques ◽  
Theoretical Background ◽  
Experimental Results ◽  
Discharge Pipe ◽  
Different Types

Abstract Guided waves testing allows a long-range screening in pipes of different types and represents an effective and powerful non-destructing technique for defect detections using a limited number of points of measures. After the characterization through a general theoretical analysis, the focus is set to a real steam discharge pipe with a high mechanical complexity used for many years in a research plant now dismissed. The experimental method applied here is the pitch-catch configuration of two magnetostrictive sensors. The objective of this paper is to establish a strong theoretical background to pave the way for a robust experimental investigation. Preliminary experimental results are consistent with the theoretical analysis.

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