1,720,980 research outputs found
Guided waves measurement techniques in pitch-catch configuration
No full textGuided waves (GWs) testing allows a long-range screening in pipes of different types and represents an effective and powerful nondestructing 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 decommissioned. The experimental method applied here is the pitch-catch configuration of two magnetostrictive sensors. This paper aims to establish a strong theoretical background to pave the way for a robust experimental investigation. Preliminary experimental results are consistent with the theoretical analysis
A Magnetic Sensors Feasibility Investigation for Continuos Intraocular Pressure Monitoring
No full textMagnetostrictive sensors for long range guided wave inspection and monitoring of in-service pipelines
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Guided waves as an online monitoring technology for long-term operation in nuclear power plants: Experimental results on a steam discharge pipe
No full textGuided wave (GW) testing is regularly used for finding defect locations through longrange screening using low-frequency waves (from 5 to 250 kHz). By using magnetostrictive sensors, some issues, which usually limit the application to nuclear power plants (NPPs), can be fixed. The authors have already shown the basic theoretical background and simulation results concerning a real steel pipe, used for steam discharge, with a complex structure. On the basis of such theoretical framework, a new campaign has been designed and developed on the same pipe, and the obtained experimental results are now here presented as a useful benchmark for the application of GWs as nondestructive techniques. Experimental measures using a symmetrical probe and a local probe in different configurations (pulse-echo and pitch-catch) indicate that GW testing with magnetostrictive sensors can be reliably applied to long-term monitoring of NPPs components
Numerical Simulation for Long Range Guided Waves Nondestructive Testing by a Wavelet Based Two Port Equivalent
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