1 Advanced signal processing approaches are widely used for nondestructive evaluation, structural health monitoring and damage detection. In this research, signals related to damage in a thin plate specimen were collected by piezoelectric wafer active sensors. Damage is detected and evaluated by using advanced signal processing approaches, including the short-time Fourier transform and the wave...

Visual inspection and nondestructive evaluation (NDE) of natural gas distribution mains is an important future maintenance cost-planning step for the nation’s gas utilities. These data need to be gathered at an affordable cost with the fewest excavations and maximum linear feet inspected for each deployment, with minimal to no disruption in service. Current methods (sniffing, direct assessment)...

By the uncertainty, the common Nondestructive quantitative testing data could not meet the needs of the basic request of Nondestructive evaluation and reliability safety analysis in actual engineering. In this article, used the uncertainty evaluation method, the regress analysis and the fuzzy theory, the soft calibration method was built for uncertainty of measurement of nondestructive quantita...

Non Destructive Evaluation (NDE) has become an inseparable part of modern society. Be it the field of engineering, technology, or healthcare, NDE is being used right from cradle to tomb to optimize processes, manage quality, predict the life and limit liability avoiding accidents. While NDE science and technology was qualitative during the first half of 20 century, the liberalisation of economi...

It has been recognized for many years that application parameters and human factors, as described in the Reliability Formula proposed at the First European-American Workshop on NDE Reliability, are limiting factors in the performance of non-destructive evaluation (NDE). Experiments to determine the probability of detection (POD) for specific NDE applications are often designed and performed in ...

abstract-Signals measured in ultrasonic nondestructive evaluation (NDE) of materials are masked by the characteristics of the measuring instruments, the propagation paths taken by the ultrasonic waves, and noise originating from various sources, including the electrical noise. Due to the band-limited characteristics of ultrasonic transducers, the received echoes are degraded by the transducer i...

SURFACE REPLICATION is a welldeveloped electron microscopy sample preparation technique that can be used to conduct in situ measurements of the microstructure of components. The in situ determination of microstructural deterioration and damage of materials subjected to various environments is an objective of any nondestructive evaluation (NDE) of structural components. The need to assess the co...

Embedded-Ultrasonics Structural Radar (EUSR) is a new concept and methodology for in-situ nondestructive evaluation (NDE) of thinwall structures. EUSR utilizes (a) a Piezo Wafer Active Sensors (PWAS) array embedded onto the structure; and (b) electronic modules for signal transmission/reception, processing, and interpretation. The EUSR methodology is developed as an extension of our previous wo...

Guided waves are being considered for structural health monitoring (SHM) applications, and they can also be used to reduce subsequent inspection times once defects are detected. One proposed SHM method is to use an array of permanently attached piezoelectric transducers to generate and receive guided waves between the various transducer pairs. The interrogation can be done on a continuous or pe...