High temperature ultrasonic transducers for the generation of guided waves for non-destructive evaluation of pipes

2014 ◽  
Author(s):  
K. Sinding ◽  
C. Searfass ◽  
N. Malarich ◽  
B. Reinhardt ◽  
B. R. Tittmann
Keyword(s):  
High Temperature ◽  
Guided Waves ◽  
Ultrasonic Transducers ◽  
Non Destructive Evaluation ◽  
Non Destructive

Eddy current technique with high temperature SQUID for non-destructive evaluation of non-magnetic metallic structures

Cryogenics ◽  
1996 ◽  
Vol 36 (2) ◽  
pp. 83-86 ◽  
Author(s):  
Y. Tavrin ◽  
H.-J. Krause ◽  
W. Wolf ◽  
V. Glyantsev ◽  
J. Schubert ◽  
...  
Keyword(s):  
High Temperature ◽  
Eddy Current ◽  
Metallic Structures ◽  
Non Destructive Evaluation ◽  
Current Technique ◽  
Non Destructive

scholarly journals Automated Health Condition Diagnosis of in situ Wood Utility Poles Using an Intelligent Non-Destructive Evaluation (NDE) Framework

2020 ◽  
Vol 20 (10) ◽  
pp. 2042002 ◽  
Author(s):  
Yang Yu ◽  
Mahbube Subhani ◽  
Azadeh Noori Hoshyar ◽  
Jianchun Li ◽  
Huan Li
Keyword(s):  
Communication Networks ◽  
Guided Waves ◽  
Power Transmission ◽  
Influence Factors ◽  
Principal Component ◽  
Field Testing ◽  
Health Condition ◽  
Non Destructive Evaluation ◽  
Utility Poles ◽  
Non Destructive

Wood utility poles are widely applied in power transmission and telecommunication systems in Australia. Because of a variety of external influence factors, such as fungi, termite and environmental conditions, failure of poles due to the wood degradation with time is of common occurrence with high degree uncertainty. The pole failure may result in serious consequences including both economic and public safety. Therefore, accurately and timely identifying the health condition of the utility poles is of great significance for economic and safe operation of electricity and communication networks. In this paper, a novel non-destructive evaluation (NDE) framework with advanced signal processing and artificial intelligence (AI) techniques is developed to diagnose the condition of utility pole in field. To begin with, the guided waves (GWs) generated within the pole is measured using multi-sensing technique, avoiding difficult interpretation of various wave modes which cannot be detected by only one sensor. Then, empirical mode decomposition (EMD) and principal component analysis (PCA) are employed to extract and select damage-sensitive features from the captured GW signals. Additionally, the up-to-date machine learning (ML) techniques are adopted to diagnose the health condition of the pole based on selected signal patterns. Eventually, the performance of the developed NDE framework is evaluated using the field testing data from 15 new and 24 decommissioned utility poles at the pole yard in Sydney.

scholarly journals NDT application for detection of corrosion under insulation in Vietnam

2021 ◽  
Vol 11 (1) ◽  
pp. 48-54
Author(s):  
The Man Nguyen ◽  
Duc Vinh Vu
Keyword(s):  
High Temperature ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Piping System ◽  
Gas Industry ◽  
Non Destructive Evaluation ◽  
The Cost ◽  
Fluid Leak ◽  
Non Destructive ◽  
Corrosion Under Insulation

: In the oil and gas Industry, insulation materials can be used widely for piping system, tank and vessel in either low or high temperature applications. CUI can cause equipment degradation, fluid leak, which lead to explosion or environmental pollution and the cost will very expensive. Therefore, CUI need to be detected early to prevent damage. Through experiment, Center for Non-Destructive Evaluation (NDE) studied on establishing and appliying 4 NDT procedures for CUI examination on typical petroleum piping using in Vietnam. A discussion is presented below

scholarly journals Mathematical modelling of ultrasonic non-destructive evaluation

2001 ◽  
Vol 5 (3) ◽  
pp. 165-180 ◽  
Author(s):  
Larissa Ju Fradkin ◽  
Victor Zalipaev ◽  
Dmitri Gridin
Keyword(s):  
Mathematical Modelling ◽  
High Frequency ◽  
Pulse Propagation ◽  
Nuclear Reactors ◽  
Near Field ◽  
Ultrasonic Transducers ◽  
Non Destructive Evaluation ◽  
Non Destructive

High-frequency asymptotics have been used at our Centre to develop codes for modelling pulse propagation and scattering in the near-field of the ultrasonic transducers used in NDE (Non-Destructive Evaluation), particularly of walls of nuclear reactors. The codes are hundreds of times faster than the direct numerical codes but no less accurate.

Non-Destructive Evaluation of Creep Damage of Ni-Based Superalloy Using A Scanning Blue Laser Microscope

2007 ◽  
Vol 353-358 ◽  
pp. 2391-2394 ◽  
Author(s):  
Kuniaki Akahoshi ◽  
Kazuhiro Ogawa ◽  
Hideo Miura
Keyword(s):  
Refractive Index ◽  
High Temperature ◽  
Creep Damage ◽  
Blue Laser ◽  
Gamma Phase ◽  
Gamma Prime ◽  
High Temperature Materials ◽  
Non Destructive Evaluation ◽  
Non Destructive ◽  
Prime Phase

In order to assure the reliability of advanced gas turbine systems, it is very important to evaluate the damage of high temperature materials such as Ni-based superalloys under creep and fatigue conditions quantitatively. The refractive index of the gamma-prime phase is found to be smaller than that of the gamma phase in the Ni-based superalloy, when the wavelength of an irradiated laser beam is shorter than 500 nm. Therefore, it is possible to evaluate the creep damage of this material quantitatively and non-destructively by observing the change of the micro texture in a grain (rafting) using a scanning laser microscope.

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