Impact-Echo Non-Destructive Testing and Evaluation with Time-Frequency Data Process and Analysis

2012 ◽  
Author(s):  
Mark Emde ◽  
Ruichong Zhang
Keyword(s):  
Frequency Data ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Impact Echo ◽  
Time Frequency ◽  
Data Process ◽  
Non Destructive ◽  
Testing And Evaluation

Estimation of Thickness of Concrete Slab Members Using Impact Echo Method

2014 ◽  
Vol 605 ◽  
pp. 139-142
Author(s):  
Seong Uk Hong ◽  
Yong Taeg Lee ◽  
Seung Hun Kim ◽  
J.H. Na
Keyword(s):  
Concrete Slab ◽  
Hardness Test ◽  
Pulse Velocity ◽  
Non Destructive Testing ◽  
Testing Methods ◽  
Destructive Testing ◽  
Impact Echo ◽  
Maintenance And Repair ◽  
Non Destructive ◽  
Impact Echo Method

Recently, the interest in maintenance and repair of existing concrete structures have increased, and it is typical to use non-destructive testing methods such as rebound hardness test or ultrasonic pulse velocity method to execute maintenance and repair of structures efficiently. Many non-destructive testing methods are being used in practice such as at construction sites, but verification for site applications are quite inadequate. Thus, this study intends to evaluate the applicability of Impact Echo Method which is one of the non-destructive testing methods using stress wave. Total of four specimens were planned and produced. The thickness of concrete slab members was estimated using I.E(OLSENs Freedom Data PC with Win.TFS Software Version 2.5.2). The estimated materials of concrete members by IE was found to be IE-1 specimen 178mm, IE-2 specimen 197mm, IE-3 specimen 191mm, and IE-4 specimen 263mm, and the error rate was found to be 4.22%~18.67% (average 9.6%), showing that they are relatively well in agreement. In this study, the experiments were executed with the objective of estimating the thickness of concrete slab members using Impact Echo Method. Through this study, the applicability of thickness estimation in concrete slab members using impact echo method could be confirmed.

Infrared Image Correlation for Non-destructive Testing and Evaluation of Materials

2021 ◽  
Vol 40 (3) ◽  
Author(s):  
Vanita Arora ◽  
Ravibabu Mulaveesala ◽  
Anju Rani ◽  
Sumit Kumar ◽  
Vansha Kher ◽  
...  
Keyword(s):  
Infrared Image ◽  
Image Correlation ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive ◽  
Testing And Evaluation

Recent advances in thermal wave detection and ranging for non-destructive testing and evaluation of materials

2013 ◽  
Author(s):  
Ravibabu Mulaveesala ◽  
V. S. Ghali ◽  
Vanita Arora ◽  
Juned A. Siddiqui ◽  
Amarnath Muniyappa ◽  
...  
Keyword(s):  
Thermal Wave ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Wave Detection ◽  
Recent Advances ◽  
Non Destructive ◽  
Testing And Evaluation

Advances in the Computed Tomography of Turbine Blades

2005 ◽  
Author(s):  
Martin Allen ◽  
Andrew T. Ramsey
Keyword(s):  
Computed Tomography ◽  
Data Extraction ◽  
Turbine Blades ◽  
Practical Method ◽  
International Standards ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Wide Range ◽  
Non Destructive ◽  
Testing And Evaluation

Recent advances in virtually all areas of industrial Computed Tomography (CT) now allow faster, higher resolution, and increasingly economic CT inspection of turbine blades than ever before. CT is now used for a wide range of Non Destructive Testing and Evaluation (NDT&E) applications including first article inspection, defect detection, internal measurement, wear (and failure) analysis, and reverse engineering. Improvements range from the introduction of international standards on CT, through improvements in acquisition, reconstruction, and data extraction. Some of the most significant advances have been made in the ability to process the data generated by the CT systems. Today, CT is an increasingly practical method for the Non Destructive Testing and Evaluation of turbine blades.

scholarly journals A Digital Grayscale Generation Equipment for Image Display Standardization

2020 ◽  
Vol 10 (7) ◽  
pp. 2297
Author(s):  
Yiqin Jiang ◽  
Zilong Liu ◽  
Yuxiao Li ◽  
Jin Li ◽  
Yusheng Lian ◽  
...  
Keyword(s):  
Remote Sensing ◽  
High Accuracy ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Digital Light Processing ◽  
Time Frequency ◽  
Relative Value ◽  
The Relationship ◽  
Non Destructive ◽  
Digital Equipment

The standardization of grayscale display is essentially significant for image signal communication, transmission, and terminal reading. The key step of this standardization is establishing a traceable equipment of grayscale. As a relative value, grayscale is transferred to two different absolute values to satisfy different traceability methods, including optical density for hardcopy image and luminance for softcopy. For luminance, a generation equipment is designed to build the relationship between luminance and grayscale. In this work, novel equipment is established using digital light processing (DLP) by time-frequency modulation, and the corresponding uncertainty is analyzed. The experiment result shows that this digital equipment builds the relationship between grayscale and luminance in the range of 0.16-4000 cd/m2. It enables traceable measurement of grayscale to luminance on this equipment with high accuracy and can provide a standardized reference for the display of grayscale images in the fields of medicine, remote sensing, non-destructive testing, etc.

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