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About 10,000 papers for “Ultrasonic testing”

Comparison of Laser Ultrasonic Testing and traditional Ultrasonic Testing

Benjamin van Elburg, W. Krämer, Patrick A. Jansen · Proceedings of the Annual British Conference on Non-Destructive Testing · 2025

Ultrasonic inspection is a widely accepted method in the aerospace industry for detecting defects and characterizing materials. However, the traditional ultrasonic technique requires precise alignment and couplant between the ultrasonic scanner and the material, or even complete water immersion. This can be impractical and limits its application. Laser ultrasonics overcomes these inconveniences by generating and detecting ultrasonic waves by lasers. This enables fast contactless ultrasonic inspection without couplant or immersion. While laser ultrasonic inspection has advantages over traditional ultrasonic inspection, the generated ultrasound is relatively broadband and its intensity is limited by the ablation threshold, i.e.the maximum laser energy without damaging the material. Therefore a comparative study between ultrasonics and laser ultrasonics was conducted on representative aerospace components, focusing on defect detectability, signal-to-noise ratios, and inspection speed. Laser ultrasonics is up to 10 times faster than traditional single element ultrasonics. Both techniques can easily discriminate defects of 0.25 inch, however laser ultrasonics is less suited for defect detection in thick (> 5 mm) components. Furthermore, the relaxed alignment conditions of laser ultrasonics allow for the fast inspection of complex-shaped components.

Cited by 0

Ultrasonic Testing Machine

University of Pittsburgh Digital Library · 1966

A close up of an ultrasonic testing machine. This machine used high frequency sound waves to check for flaws in steel. The ultrasonic waves would travel straight through uniform steel but they would be reflected by any internal imperfection. This machine represents one of several technological advances utilized by Homestead at this time for the purpose of producing higher quality steel.

Cited by 0

Robotic Ultrasonic Testing

Santhosh Ravichandran · Indian Journal of Science and Technology · 2017

Objectives: This paper describes a system for inspecting the pipelines used under sea water by robotic ultrasonic methods. The invention discusses the use of a series of robots inside the pipeline for the detection of defect using the ultrasonic testing. Methods/Statistical analysis: The underwater piping system is the best option for the transportation of oils and natural gases as this pipe ranges a large distance. But there is the possibility of defects such as crack, or corrosion on the wall of pipes. So in order to detect any defect on the interior surface of pipe, non-destructive testing methods are employed. As the pipeline is so long, it is impossible to go and check manually. So robots are deployed inside the pipe line for inspection. In some cases inspection of defects using a single robot is not accurate. Therefore in this present disclosure a series of the robots are deployed in the pipeline which moves to and fro motion to cover certain distance. The series of robots are placed at a specific distant to each other as there will be no collision between them. Findings: The deployed series of robots detect the defect by using the ultrasonic non-destructive testing. Ultrasonic inspection is the technology used to test the objects by directing the higher frequency sound waves onto the object to find defects on both surface and internal. This beam travels through the object with some loss, except when it is diverted and reflected by a discontinuity. The detection, location, and evaluation of discontinuities become possible as the velocity of sound into the object being tested is almost constant. Application/Improvements: The use of a series of robots in the underwear piping system enables easier and better detection of faults and blockages in the piping system. Keywords: Camera, Corrosion, Defects, Internet of Things, Main Controller, Non-Destructive, Robots, Ultrasonic, Underwater Pipelines

Cited by 1Open access