Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Thompson V. Nguyen"'
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 64:602-616
This paper discusses some improvements to ultrasonic synthetic imaging in solids with primary applications to nondestructive testing of materials and structures. Specifically, the study proposes new adaptive weights applied to the beamforming array t
Publikováno v:
Journal of Transportation Engineering, Part A: Systems. 143
This paper presents the latest results from a noncontact ultrasonic rail inspection system developed at the University of California, San Diego (UCSD) under the auspices of the Federal Rail...
Autor:
Robert Phillips, Francesco Lanza di Scalea, Stefano Mariani, Wieslaw J. Staszewski, Gary Carr, Mahmood Fateh, Thompson V. Nguyen, Piotr Kijanka
Publikováno v:
Structural Health Monitoring. 12:539-548
This article describes a new system for high-speed and noncontact rail integrity evaluation being developed at the University of California at San Diego. A prototype using an ultrasonic air-coupled guided wave signal generation and air-coupled signal
Autor:
Xuan Zhu, Thompson V. Nguyen, Francesco Lanza di Scalea, Stefano Mariani, Robert Wilson, Mahmood Fateh, Simone Sternini
Publikováno v:
2016 Joint Rail Conference.
In the last ten years, over 1,000 train derailments that occurred in the US railroad system were caused by undetected rail internal defects that suddenly and dramatically emerged as track breakages. The total cost of those accidents is quantifiable i
Publikováno v:
2016 Joint Rail Conference.
In current rail inspection processes, following a detection of a suspected internal defect, an additional secondary detailed inspection is required to (1) confirm the presence of the flaw and (2) determine the severity of the flaw to allow for optima
Publikováno v:
SPIE Proceedings.
In the field of non-destructive evaluation of structures, 2D and 3D imaging of internal flaws is a critical task. Defect imaging allows making informed follow-up decisions based on the morphology of the flaw. This paper will present advances in ultra
Publikováno v:
SPIE Proceedings.
The University of California at San Diego (UCSD), under a Federal Railroad Administration (FRA) Office of Research and Development (R&D) grant, is developing a system for high-speed and non-contact rail defect detection. A prototype using an ultrason
Publikováno v:
Structural Health Monitoring 2015.
The ability to image a structural flaw in 3D allows to make informed decisions on followup maintenance actions. Flaw imaging can be achieved through the use of tomographic image reconstruction algorithms applied to transient mechanical or thermal wav
Publikováno v:
2014 Joint Rail Conference.
This paper describes a new system for high-speed and non-contact rail defect detection being developed at the University of California at San Diego (UCSD). A prototype using an ultrasonic air-coupled guided wave signal generation and air-coupled sign
Publikováno v:
SPIE Proceedings.
The University of California at San Diego (UCSD), under a Federal Railroad Administration (FRA) Office of Research and Development (R&D) grant, is developing a system for high-speed and non-contact rail integrity evaluation. A prototype using an ultr