HIGH RESOLUTION 2D MAGNETIC VISION- B-Cam
Lead Research Organisation:
University of Manchester
Department Name: Electrical and Electronic Engineering
Abstract
An electric current generates a magnetic field. In metal structures, imperfections in the structure such as cracks or material flaws show up in the field pattern generated when current flows in the structure. If the current is changing, the field may be detected as a voltage in a pickup coil. However pick-up coils are bulky and it is impractical to assemble an array of coils that could sense a field pattern over an appreciable area of space in proximity to a structure under test. For this reason, magnetic field testing is not used for sub-sea structures and in general is confined to laboratory use.
There is a semiconductor alternative to using sensing coils, called a Hall Effect device. We have a technology which can make these devices as sensitive as coils in the context of field mapping. They have a huge advantage in that they respond uniformly to fields of all practical frequencies, while coils no not.
The semiconductor technology makes it practical to produce a camera which can see a magnetic field pattern over an appreciable area. The camera would need a sophisticated current generator to excite the structure. This can be thought of as akin to illuminating the scene. Such a camera would be a major step forward in checking integrity of metal structures. It could be fitted to submersible vehicles and used to inspect pipelines and rig structures. It adds to safety in the Oil and Gas industry.
The project involves enhancing the sensitivity of a new type of extremely sensitive Hall Effect devices and building a prototype camera to demonstrate the power of the new technique. We expect it to generate a service industry in inspection and also to further materials research.
There is a semiconductor alternative to using sensing coils, called a Hall Effect device. We have a technology which can make these devices as sensitive as coils in the context of field mapping. They have a huge advantage in that they respond uniformly to fields of all practical frequencies, while coils no not.
The semiconductor technology makes it practical to produce a camera which can see a magnetic field pattern over an appreciable area. The camera would need a sophisticated current generator to excite the structure. This can be thought of as akin to illuminating the scene. Such a camera would be a major step forward in checking integrity of metal structures. It could be fitted to submersible vehicles and used to inspect pipelines and rig structures. It adds to safety in the Oil and Gas industry.
The project involves enhancing the sensitivity of a new type of extremely sensitive Hall Effect devices and building a prototype camera to demonstrate the power of the new technique. We expect it to generate a service industry in inspection and also to further materials research.
People |
ORCID iD |
Mohamed Missous (Principal Investigator) |
Publications
Biruu F.A.
(2017)
2D magnetic field sensing around defects in ferromagnetic and non-ferromagnetic materials using 2DEG quantum well hall effect sensor arrays
in 56th Annual Conference of the British Institute of Non-Destructive Testing, NDT 2017
Chen-Wei LIANG
(2016)
A Quantum Well Hall Effect Magnetovision System for Non-Destructive Testing
Biruu F.A.
(2016)
A quantum well hall effect sensor based handheld magnetic scanner with programmable electromagnetic coil for non-destructive testing of ferromagnetic and non-ferromagnetic materials
in 55th Annual Conference of the British Institute of Non-Destructive Testing, NDT 2016
Liang C.W.
(2017)
A real time quantum well hall effect 2D handheld magnetovision system for ferromagnetic and non-ferromagnetic materials non-destructive testing
in 56th Annual Conference of the British Institute of Non-Destructive Testing, NDT 2017
Sadeghi M
(2014)
Development of the low power and highly sensitive GaAs 2DEG DC linear/unipolar Hall Effect integrated circuits
in BINDT 2014
M. Sadeghi
(2014)
Highly Sensitive InGaAs-AlGaAs-GaAs 2DEG Quantum Well Hall Effect Integrated Circuits
in European Conference on Non-Destructive Testing (ECNDT) 2014
Sadeghi M
(2015)
Highly Sensitive Nanotesla Quantum-Well Hall-Effect Integrated Circuit Using GaAs-InGaAs-AlGaAs 2DEG
in IEEE Sensors Journal
Ahmad E.
(2016)
Non-destructive detection of defects in materials by a hand-held QWHE magnetic scanner
in 55th Annual Conference of the British Institute of Non-Destructive Testing, NDT 2016
Ahmad E.
(2017)
Non-destructive detection of metallic objects under AC magnetic field illumination
in 56th Annual Conference of the British Institute of Non-Destructive Testing, NDT 2017
Jawad G
(2015)
On the Design of Gyroelectric Resonators and Circulators Using a Magnetically Biased 2-D Electron Gas (2-DEG)
in IEEE Transactions on Microwave Theory and Techniques
Description | Novel Magnetic Sensors and Their Applications |
Form Of Engagement Activity | Participation in an activity, workshop or similar |
Part Of Official Scheme? | No |
Geographic Reach | National |
Primary Audience | Industry/Business |
Results and Impact | This was part of one day workshop on "Novel Magnetic Sensors and Their Applications" organised at RAL on 12 March 2015 |
Year(s) Of Engagement Activity | 2015 |
URL | http://www.stfc.ac.uk/innovation/ways-to-work-with-us/events-and-innovations-club/novel-magnetic-sen... |