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Biruu, Dr Firew Abera
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2023A Novel Method for Detecting the Onset and Location of Mechanical Failure by Correlating Engineering Stress with Changes in Magnetic Properties of UNS S32205 Duplex Stainless Steel Using Quantum Well Hall Effect Sensors
- 2019Surface-breaking flaw detection in mild steel welds using quantum well hall effect sensor devicescitations
- 2018Surface-Breaking Flaw Detection in Mild Steel Welds using Quantum Well Hall Effect Sensor Devices
- 2018A Comparative Study of Electromagnetic NDE Methods and Quantum Well Hall Effect Sensor Imaging for Surface-Flaw Detection in Mild Steel Welds
- 2018An Automated Two-Dimensional Magnetic Field Scanner based on Quantum Well Hall Effect Sensor for Non-Destructive Testing
- 2017A real time quantum well hall effect 2D handheld magnetovision system for ferromagnetic and non-ferromagnetic materials non-destructive testing
- 2016Non-destructive detection of defects in materials by a hand-held QWHE magnetic scanner
- 2016A quantum well hall effect sensor based handheld magnetic scanner with programmable electromagnetic coil for non-destructive testing of ferromagnetic and non-ferromagnetic materials
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document
An Automated Two-Dimensional Magnetic Field Scanner based on Quantum Well Hall Effect Sensor for Non-Destructive Testing
Abstract
© Copyright (2018) by British Institute of Non-Destructive Testing All rights reserved.<br/>With greater emphasis placed on asset integrity and materials component lifetime, Non-Destructive Testing (NDT) systems are becoming more sophisticated in the acquisition and analysis of defects of and sample under test properties. Electromagnetic based NDT systems have long become digital repositories for data storage and post-processing, with constant improvement in the techniques underway. This study presents a desktop electromagnetic NDT system based on Quantum Well Hall Effect sensors that scans magnetic fields in samples to reveal defects in 2D colour maps. An XY platform, with a 340 square millimetre scanning area, is controlled via a LabVIEW program to scan the target area at a resolution of 100µm in both directions. The result of the scan is then changed into colour pixel map and displayed in real time on a host PC as the scanning progresses. Results of DC and AC scanning show that it is possible to detect defects from surface breaking standard Magnetic Particle Inspection Quantitative Quality indicator (QQI) sample, to changes in microstructure of a specimen, for instance, due to welding or mechanical stress. This NDT system yields better results in terms of sensitivity, capability in post data processing and imagery without using hazardous chemicals and consumables. The scanning QWHE sensors-based system has unique advantages in terms of making NDT systems clean and truly non-destructive. Due to its high sensitivity and wide dynamic range, the potential to scan early changes in microstructure of materials is a real possibility.