Review on the Development of Non-Destructive Testing Based on Laser Ultrasonic Technique

2014 ◽  
Author(s):  
Yuanfeng He ◽  
Wenwu Zhang
Keyword(s):  
Quality Control ◽  
Optical Method ◽  
Vibration Signal ◽  
Quality Inspection ◽  
Ultrasonic Technique ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Laser Ultrasonic ◽  
Ultrasonic Technology ◽  
Non Destructive

Development of industry demands better performance of equipments and devices than ever. The property of material used to produce the equipments is the precondition to ensure the quality. As equipments are usually required to be integral during the quality inspection, non-destructive testing (NDT) plays an increasingly import role in modern industry quality control. Different NDT methods are introduced and analyzed. The mechanism of ultrasonic exciting is described. After the ultrasonic is excited, the vibration signal can be detected by transducer or optical method which are then illustrated. In the section of development of laser ultrasonic technology, contributions made by various researchers in theoretic development, experiment, simulation and application are introduced and the corresponding content of the researches as well. The conclusion and the outlook of laser ultrasonic technique is made at the last.

Applying Non-destructive Testing and Machine Learning to Ceramic Tile Quality Control

2018 ◽  
Author(s):  
Renan Cunha ◽  
Gustavo Medeiros De Araujo ◽  
Rodrigo Maciel ◽  
Giann S. Nandi ◽  
Marina R. Daros ◽  
...  
Keyword(s):  
Machine Learning ◽  
Quality Control ◽  
Ceramic Tile ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive

Study of Nanostructured Composites Using the Sclerometry Method

2014 ◽  
Vol 627 ◽  
pp. 233-236 ◽  
Author(s):  
Natalia Lvova ◽  
Sergey Perfilov ◽  
A. Useinov
Keyword(s):  
Mechanical Properties ◽  
Quality Control ◽  
Comparative Study ◽  
Scratch Test ◽  
Extrusion Process ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Stress Strain ◽  
Nanostructured Composites ◽  
Non Destructive

A comparative study of the mechanical properties of the extruded and flattened nanostructured composites Al-C60 has been made using two different methods of destructive and non-destructive testing: tensile and compression macro-tests and sub-micron range sclerometry (scratch test). Direct correlation was found between the dominant types of deformation during scratching and the type of “stress-strain” dependencies. The results are useful for understanding the extrusion process and quality control at different load scale.

Optical coherence tomography for non-destructive testing

2020 ◽  
Vol 87 (6) ◽  
pp. 404-413
Author(s):  
Fabian Zechel ◽  
Rouwen Kunze ◽  
Niels König ◽  
Robert Heinrich Schmitt
Keyword(s):  
Optical Coherence Tomography ◽  
Real Time ◽  
Optical Method ◽  
Review Paper ◽  
Optical Coherence ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive ◽  
Time Evaluation ◽  
Penetration Depths

AbstractIn this review paper, conventional non-destructive testing (NDT) methods are briefly introduced and compared with selected examples for applications of optical coherence tomography (OCT) for NDT. The contactless, non-destructive and purely optical method enables multi-dimensional imaging for tomographic real-time evaluation in various fields of application. Depending on the material, penetration depths of several millimeters can be achieved, thus providing an attractive solution that can be used both as a stand-alone and as a process-integrated solution.

Signal Analysis of Scratch-Detection on Magnetic Disc by Using Light Reflection Approach

2015 ◽  
Vol 781 ◽  
pp. 203-206 ◽  
Author(s):  
Achinee Polsawat ◽  
Nattawoot Suwannata ◽  
Apirat Siritaratiwat ◽  
Anan Kruesubthaworn
Keyword(s):  
Laser Beam ◽  
Signal Analysis ◽  
Quality Inspection ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Recording Head ◽  
Process Machinery ◽  
Magnetic Disc ◽  
Non Destructive ◽  
Scratch Detection

In hard disk manufacturing, a process of quality inspection of magnetic disc is crucially focused on finding traces of scratch that occur on the surface by various sources such as production process, machinery, tribology or recording head. It may affect the efficiency of magnetic disc’s read/write ability. Many approaches have been proposed to detect the scratch by either destructive or non-destructive testing. In this study, it shows an analysis of signals from the detected scratches on the magnetic disc by reflection light method, using a CD pick-up head. It works by producing an incidental laser beam to the surface and then detecting it by a photodiode detector. The results showed that when the laser beam is incident onto the magnetic disc with/ without scratch, reflecting lights to the photodiode are different and the signal changes according to the intensity of the incidental/reflecting lights.

Parametric optimization of pulse-echo laser ultrasonic system for inspection of thick polymer matrix composites

2020 ◽  
Vol 19 (2) ◽  
pp. 443-453 ◽  
Author(s):  
AD Abetew ◽  
TC Truong ◽  
SC Hong ◽  
JR Lee ◽  
JB Ihn
Keyword(s):  
Composite Structures ◽  
Polymer Matrix Composites ◽  
Matrix Composites ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Laser Ultrasonic ◽  
Ultrasonic Signals ◽  
Peak Energy ◽  
Pulse Echo ◽  
Non Destructive

One of the main challenges of using laser ultrasonic techniques for non-destructive testing applications is the typically low signal-to-noise ratio of the laser ultrasonic signals. In the case of thick composite structures, this is even more problematic since composite materials have very strong sound attenuation. This article investigates the effects of laser beam size and profile to the amplitude of pulse-echo laser ultrasonic signals with the constraint that the peak energy density (fluence) must be kept constant under the thermal damage threshold of material like polymer matrix composites. Such constraint is very important for the non-destructive feature of non-destructive testing, yet in a number of the existing parameter studies of laser ultrasonics, it was not fully investigated. In this article, a series of A-scan and C-scan experiments on thick composite specimens shows that the amplitude of the direct waves and the reflected waves increases with the increase in laser beam size with constant peak energy density. This amplitude enhancement significantly improves the propagation depth, thereby optimizing the system for inspection of thick composite structures. The validity of experimental results is verified theoretically by solving the thermoelastic model of epicenter displacement using Laplace–Hankel transformation.

Application of linear frequency modulated laser ultrasonic radar in reflective thickness and defect non-destructive testing

2019 ◽  
Vol 102 ◽  
pp. 84-89 ◽  
Author(s):  
Huiting Huan ◽  
Andreas Mandelis ◽  
Lixian Liu ◽  
Bahman Lashkari ◽  
Alexander Melnikov
Keyword(s):  
Non Destructive Testing ◽  
Destructive Testing ◽  
Laser Ultrasonic ◽  
Linear Frequency ◽  
Non Destructive

ECT: Development of eddy current non-destructive testing procedure for quality control of thin-walled nickel tubes

2004 ◽  
Vol 46 (9) ◽  
pp. 533-536 ◽  
Author(s):  
S Thirunavukkarasu ◽  
S Vaidyanathan ◽  
B P C Rao ◽  
K H Mahendran ◽  
T Jayakumar ◽  
...  
Keyword(s):  
Quality Control ◽  
Eddy Current ◽  
Testing Procedure ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Thin Walled ◽  
Non Destructive

Non-Destructive Testing of Wood Defects Based on Ultrasonic Technology

2013 ◽  
Vol 401-403 ◽  
pp. 1124-1128 ◽  
Author(s):  
Wen Shu Lin ◽  
Jin Zhuo Wu
Keyword(s):  
Wood Products ◽  
Propagation Path ◽  
Propagation Time ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Ultrasonic Technology ◽  
Propagation Parameters ◽  
Old Trees ◽  
Wooden Structures ◽  
Non Destructive

The elm wood samples were tested by the technique of ultrasonic, and the testing results were analyzed by using the statistic software of SPSS. The results showed that the moister content of wood, wood crack, the sizes of holes and numbers of holes have significant influence on propagation parameters and dynamic modulus of elasticity. If there are holes or cracks in the propagation path, the propagation time will be longer, and the propagation velocity and wood modulus will decrease accordingly. The studying results of this paper will provide a sound background for the application of ultrasonic technique in detecting the inner defects of wood products and other wooden structures, and also offer important reference for testing the inner defects of old trees and ancient buildings.

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