A wavelength-dependent radiator for improved non-contact measurements of elastodynamic guided waves

2021 ◽  
Vol 149 (4) ◽  
pp. A126-A126
Author(s):  
Christopher Hakoda ◽  
Cristian Pantea ◽  
Vamshi K. Chillara
Keyword(s):  
Guided Waves ◽  
Contact Measurements

Recent progress in computing guided waves dispersion curves

2007 ◽  
Author(s):  
Mihai V. Predoi ◽  
Michel Castaings ◽  
Bernard Hosten ◽  
Christophe Bacon
Keyword(s):  
Recent Progress ◽  
Guided Waves ◽  
Dispersion Curves

FAULT-ZONE EXPLORATION IN HIGHLY URBANIZED SETTINGS USING GUIDED WAVES: AN EXAMPLE FROM THE RAYMOND FAULT, LOS ANGELES, CALIFORNIA

2017 ◽  
Author(s):  
R.D. Catchings ◽  
◽  
Janis L. Hernandez ◽  
Robert R. Sickler ◽  
M.R. Goldman ◽  
...  
Keyword(s):  
Los Angeles ◽  
Fault Zone ◽  
Guided Waves

LOCATING 1906 SAN FRANCISCO EARTHQUAKE SURFACE FAULT RUPTURES USING PGV OF GUIDED WAVES

2020 ◽  
Author(s):  
Rufus Catchings ◽  
◽  
M.J. Rymer ◽  
M.R. Goldman
Keyword(s):  
San Francisco ◽  
Guided Waves

ULTRASONIC GUIDED WAVES FOR THE INSPECTION OF ADHESIVELY BONDED JOINTS

2008 ◽  
Author(s):  
Padma Kumar Puthillath ◽  
Fei Yan ◽  
Clifford J. Lissenden ◽  
Joseph L. Rose ◽  
Donald O. Thompson ◽  
...  
Keyword(s):  
Guided Waves ◽  
Ultrasonic Guided Waves ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints

scholarly journals Estimation of the Filling Distribution and Height Levels Inside an Insulated Pressure Vessel by Guided Elastic Wave Attenuation Tomography

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 179
Author(s):  
Robert Neubeck ◽  
Mareike Stephan ◽  
Tobias Gaul ◽  
Bianca Weihnacht ◽  
Lars Schubert ◽  
...  
Keyword(s):  
Guided Waves ◽  
Oil And Gas ◽  
Wave Attenuation ◽  
Oil And Gas Industry ◽  
Pressure Vessels ◽  
Prototype System ◽  
Gas Industry ◽  
Distributed Sensor ◽  
Conversion Rates ◽  
Scale Experiment

The operation efficiency and safety of pressure vessels in the oil and gas industry profits from an accurate knowledge about the inner filling distribution. However, an accurate and reliable estimation of the multi-phase height levels in such objects is a challenging task, especially when considering the high demands in practicability, robustness in harsh environments and safety regulations. Most common systems rely on impractical instrumentation, lack the ability to measure solid phases or require additional safety precautions due to their working principle. In this work, another possibility to determine height levels by attenuation tomography with guided elastic waves is proposed. The method uses a complete instrumentation on the outer vessel shell and is based on the energy conversion rates along the travel path of the guided waves. Noisy data and multiple measurements from sparsely distributed sensor networks are translated into filling levels with accuracies in the centimeter range by solving a constrained optimization problem. It was possible to simultaneously determine sand, water, and oil phases on a mock-up scale experiment, even for artificially created sand slopes. The accuracy was validated by artificial benchmarking for a horizontal vessel, giving references for constructing an affordable prototype system.

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