SHEAROGRAPHY: A Full-Field Measurement Technique and Application in Non-Destructive Testing

2005 ◽  
Author(s):  
Michael Y. Y. Hung
Keyword(s):  
Measurement Technique ◽  
Field Measurement ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Full Field ◽  
Full Field Measurement ◽  
Non Destructive

scholarly journals A Versatile Illumination System for Real-Time Terahertz Imaging

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3993
Author(s):  
Jean-Baptiste Perraud ◽  
Adrien Chopard ◽  
Jean-Paul Guillet ◽  
Pierre Gellie ◽  
Antoine Vuillot ◽  
...  
Keyword(s):  
Real Time ◽  
Signal To Noise Ratio ◽  
Beam Steering ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Full Field ◽  
Illumination System ◽  
Optimized Distribution ◽  
Non Destructive ◽  
Field Imaging

Terahertz technologies are attracting strong interest from high-end industrial fields, and particularly for non-destructive-testing purposes. Currently lacking compactness, integrability as well as adaptability for those implementations, the development and commercialisation of more efficient sources and detectors progressively ensure the transition toward applicative implementations, especially for real-time full-field imaging. In this work, a flexible illumination system, based on fast beam steering has been developed and characterized. Its primary goal is to suppress interferences induced by the coherence length of certain terahertz sources, spoiling terahertz images. The second goal is to ensure an enhanced signal-to-noise ratio on the detector side by the full use and optimized distribution of the available power. This system provides a homogeneous and adjustable illumination through a simplified setup to guarantee optimum real-time imaging capabilities, tailored to the sample under inspection. Working toward industrial implementations, different illumination process are conveniently assessed as a result of the versatility of this method.

scholarly journals Non Destructive Investigation of Defects in Composite Structures by Full-Field Measurement Methods

2013 ◽  
Vol 550 ◽  
pp. 135-142
Author(s):  
Elodie Péronnet ◽  
Marie Laetitia Pastor ◽  
Richard Huillery ◽  
Olivier Dalverny ◽  
Sébastien Mistou ◽  
...  
Keyword(s):  
Defect Detection ◽  
Field Measurement ◽  
Composite Structures ◽  
Measurement Methods ◽  
Sandwich Composite ◽  
Full Field ◽  
X Ray ◽  
Full Field Measurement ◽  
Application Fields ◽  
Non Destructive

This paper presents different interests of non destructive full-field measurement. More precisely, it focuses on the characterization and the comparison of the X-ray tomography and two methods of infrared thermography in order to define the defect detection limits and to precise the specific application fields for each technique on multi-layered and sandwich composite structures. The obtained results are qualitatively and quantitatively analyzed.

scholarly journals Insights into Acoustically Induced PiezoLuminescence: The Visualization of Ultrasonic Beam Patterns

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 491
Author(s):  
Simon Michels ◽  
Mathias Kersemans ◽  
Guillaume Lajoinie ◽  
Michel Versluis ◽  
Philippe F. Smet
Keyword(s):  
Ultrasonic Transducers ◽  
Non Destructive Testing ◽  
Ultrasonic Beam ◽  
Destructive Testing ◽  
Full Field ◽  
Ultrasound Field ◽  
Non Destructive ◽  
Beam Patterns ◽  
Ultrasonic Investigation

Ultrasonic transducers are used in many fields of application, including medical imaging/treatment, non-destructive testing and material characterization. To assure the quality of the ultrasonic investigation transducers require regular checks for possible deterioration and accurate calibration. Current methods rely on point-by-point scanning of the ultrasound field with a needle hydrophone, which is expensive and time consuming. Recently, we have developed a new concept, in which a fast full-field visualization of the radiation field is achieved through Acoustically induced PiezoLuminescence (APL). Here, we report on an improved ultrasonic beam visualization and provide further insights into the mechanism underlying APL and mechanoluminescence.

Applying a full-field measurement technique for studying the local deformation in reclaimed asphalt pavements

2016 ◽  
Vol 121 ◽  
pp. 547-558 ◽  
Author(s):  
Mohamed Cheikh Teguedi ◽  
Benoît Blaysat ◽  
Evelyne Toussaint ◽  
Sylvain Moreira ◽  
Sébastien Liandrat ◽  
...  
Keyword(s):  
Measurement Technique ◽  
Field Measurement ◽  
Local Deformation ◽  
Asphalt Pavements ◽  
Full Field ◽  
Reclaimed Asphalt ◽  
Full Field Measurement ◽  
Reclaimed Asphalt Pavements

scholarly journals Special Issue on Advances in Digital Image Correlation (DIC)

2020 ◽  
Vol 10 (4) ◽  
pp. 1530 ◽  
Author(s):  
Jean-Noël Périé ◽  
Jean-Charles Passieux
Keyword(s):  
Digital Image Correlation ◽  
Measurement Technique ◽  
Digital Image ◽  
Field Measurement ◽  
Image Correlation ◽  
Experimental Mechanics ◽  
Special Issue ◽  
Full Field ◽  
Full Field Measurement

Digital Image Correlation (DIC) has become the most popular full field measurement technique in experimental mechanics [...]

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