Using Aural (Audible) Information Generated Directly From Conventional NDE Technology Signals to Aid the Inspector in Defect Detection and Discrimination

1996 ◽  
Vol 118 (1) ◽  
pp. 74-77
Author(s):  
A. E. Holt ◽  
G. M. Light ◽  
K. D. Polk ◽  
W. T. Clayton
Keyword(s):  
Nondestructive Evaluation ◽  
Defect Detection ◽  
Visual Interpretation ◽  
Ultrasonic Nde ◽  
To Receive

During nondestructive evaluation (NDE) of a material, an NDE instrument typically is used to receive the inspection signals and display them for visual interpretation. Work has been underway to convert these signals to a range of aural (audible) signals with the intent to enhance the accuracy of evaluation through the use of two senses (ears and eyes) instead of one. This paper describes auralization of ultrasonic NDE testing signals to improve characterization and evaluation of materials.

Nondestructive Evaluation (NDE): Auralization of Ultrasonic Signals for the Detection of Corrosion

1997 ◽  
Author(s):  
Amos E. Holt ◽  
Glenn M. Light
Keyword(s):  
Nondestructive Evaluation ◽  
High Spatial Resolution ◽  
Signal Amplitude ◽  
Visual Interpretation ◽  
Ultrasonic Signals ◽  
Thin Walls ◽  
Southwest Research Institute ◽  
Wing Structure ◽  
To Receive ◽  
Hidden Corrosion

During nondestructive evaluation (NDE), an instrument is used to receive inspection signals and display them for visual interpretation. Southwest Research Institute (SwRI) has developed technology that allows NDE signals generated from conventional ultrasonic instrumentation to be completely converted into audible (aural) signals to enhance reliability of evaluation through the use of two senses (ears and eyes) to improve inspection reliability. For example, detection of hidden corrosion on aircraft structures using conventional ultrasonic testing (UT) techniques is difficult because of thin walls and corrosion topography. These characteristics require use of high-frequency, high-spatial-resolution transducers to attempt to detect backwall signal amplitude. It is difficult to visually discriminate backwall signals of thin wing structure from the normal ringdown of the transducer. Using aural UT, a trained inspector can listen to sounds generated by aural UT equipment and detect the presence of hidden corrosion with higher reliability than using conventional UT.

Nondestructive Evaluation of Mechanically Loaded Advanced Marine Composite Structures

2014 ◽  
Vol 891-892 ◽  
pp. 594-599 ◽  
Author(s):  
Matthew E. Ibrahim ◽  
Andrew W. Phillips ◽  
Robert J. Ditchburn ◽  
Chun H. Wang
Keyword(s):  
Nondestructive Evaluation ◽  
Composite Laminates ◽  
Composite Structures ◽  
Fatigue Loading ◽  
Hybrid Laminates ◽  
Inspection Systems ◽  
Ultrasonic Nde ◽  
Thick Composites ◽  
Marine Composite ◽  
Composite Blades

Marine composite structures subject to dynamic loading typically incorporate more than one material type, and consist of laminate sections up to hundreds of millimetres in thickness. These solid hybrid laminates exhibit different behaviour in static and fatigue loading from thin aerospace composite laminates and sandwich structures. There is therefore a need to better understand the likely damage and degradation mechanisms that will occur in these thick structures and to concurrently develop nondestructive evaluation (NDE) technology to meet the consequent inspection problems. In this paper we present details of an ongoing fatigue program on marine composite blades. The challenges for ultrasonic NDE of thick composites, and emerging inspection methods using state-of-the-art inspection systems and analysis tools will be discussed.

scholarly journals Nondestructive Evaluation of Special Defects Based on Ultrasound Metasurface

2022 ◽  
Vol 8 ◽  
Author(s):  
Hualiang Zhao ◽  
Chuanxin Zhang ◽  
Jiajie He ◽  
Ying Li ◽  
Boyi Li ◽  
...  
Keyword(s):  
Nondestructive Evaluation ◽  
Defect Detection ◽  
Coupling Efficiency ◽  
Sample Surface ◽  
High Accuracy ◽  
Detection Accuracy ◽  
Planar Configuration ◽  
Directional Emission ◽  
Phase Manipulation ◽  
Thickness Evaluation

We demonstrate the nondestructive evaluation by means of directional ultrasound emitted from a planar metasurface. The ultrasound metasurface is designed to generate the collimated and directional ultrasound efficiently in a planar configuration, which is endowed with the full-2π-range phase manipulation ability and high transmittance up to 80%. We employ the directional emission based on the ultrasound metasurface to innovate the traditional nondestructive evaluation methods, benefited from the freely controlled directivity and the superior fitness to sample surface of the planar metasurface. Merits of this innovative application are evidenced by the remarkable accuracy (higher than 98%) in the thickness evaluation, and precise detection (accuracy higher than 96%) of the special defect inside the V-shaped workpiece which is intractable to be inspected conventionally. The implementation of the metasurface-based directional ultrasound emission in the nondestructive evaluation bears the advantages of high coupling efficiency, superior fitness, high accuracy, and applicability to special defect, providing new solutions to the challenges in conventional defect detection and promotes the development in the nondestructive evaluation applications.

Ultrasonic NDE System Modeling and Reliability – An Overview

2006 ◽  
Vol 110 ◽  
pp. 111-116
Author(s):  
Lester W. Schmerr
Keyword(s):  
Nondestructive Evaluation ◽  
System Modeling ◽  
Probability Of Detection ◽  
Reliability Modeling ◽  
Modeling Technology ◽  
The Past ◽  
Ultrasonic Nde ◽  
Relationship Of ◽  
The Relationship ◽  
Made In

Over the past two and a half decades there has been considerable progress made in the modeling of ultrasonic nondestructive evaluation (NDE) inspections. These models have also been combined with models of the noise and variability present in an inspection to estimate probability of detection (POD) versus flaw size curves. An overview will be given of the past and present accomplishments made in ultrasonic NDE modeling, POD modeling, and the relationship of those advances to reliability modeling that incorporates explicitly the results of inspections. A brief look into the future of this modeling technology will also be given.

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