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Mr D Shipley
Applications accepted all year round
About the Project
Faculty of Engineering – Division of Manufacturing
EngD in Calibration for X-ray Computed Tomography
The issue
Industrial X-ray Computed Tomography (XCT) is a complex measurement process that involves a number of inter-related steps. From this starting point, plus the requirement to measure internal features made from a multitude of materials, the development of a calibration process is also complex. Whilst the transmission of X-ray photons through a given material is a linear process, the use of polychromatic sources with industrial XCT systems, and the potentially complex nature of the measurement object, means that the process often becomes non-linear and prediction of performance is problematic. This means that the interpretation of geometrical data is not traceable and the performance of the systems as quantitative Non-destructive Testing tools or Coordinate Measurement Machines in a production environment is questionable.
The National Physics Laboratory (NPL) is currently working to address calibration and performance verification of industrial XCT systems.
Project proposal
The calibration process has been split into four main tasks and this EngD will focus on one of these. Namely:
A series of (radiographic) projections is built up by rotating the object being measured and a mathematical reconstruction of the object is calculated. The capturing of the series of projections is essentially a CMM process and many of the techniques that are applied to the modelling and calibration of conventional CMMs can be applied. However, the novel architecture of a XCT system needs to be explored.
The EngD
The EngD Researcher will work as part of a wider project team with NPL, mainly focussing on the above task. The EngD will be co-supervised by NPL and Loughborough University. They will be provided relevant industrial challenges by The Manufacturing Technology Centre.
How to apply
For further information visit: http://www.manufacturingedc.ac.uk or contact the Centre Manager requesting an information and application pack:
David Shipley
Manufacturing Technology Engineering Doctorate Centre
The University Of Nottingham
T: 0115 9513836 E: [Email Address Removed]
Please quote ref. ENG/701. This studentship will remain open until filled.
EngD in Calibration for X-ray Computed Tomography
The issue
Industrial X-ray Computed Tomography (XCT) is a complex measurement process that involves a number of inter-related steps. From this starting point, plus the requirement to measure internal features made from a multitude of materials, the development of a calibration process is also complex. Whilst the transmission of X-ray photons through a given material is a linear process, the use of polychromatic sources with industrial XCT systems, and the potentially complex nature of the measurement object, means that the process often becomes non-linear and prediction of performance is problematic. This means that the interpretation of geometrical data is not traceable and the performance of the systems as quantitative Non-destructive Testing tools or Coordinate Measurement Machines in a production environment is questionable.
The National Physics Laboratory (NPL) is currently working to address calibration and performance verification of industrial XCT systems.
Project proposal
The calibration process has been split into four main tasks and this EngD will focus on one of these. Namely:
A series of (radiographic) projections is built up by rotating the object being measured and a mathematical reconstruction of the object is calculated. The capturing of the series of projections is essentially a CMM process and many of the techniques that are applied to the modelling and calibration of conventional CMMs can be applied. However, the novel architecture of a XCT system needs to be explored.
The EngD
The EngD Researcher will work as part of a wider project team with NPL, mainly focussing on the above task. The EngD will be co-supervised by NPL and Loughborough University. They will be provided relevant industrial challenges by The Manufacturing Technology Centre.
How to apply
For further information visit: http://www.manufacturingedc.ac.uk or contact the Centre Manager requesting an information and application pack:
David Shipley
Manufacturing Technology Engineering Doctorate Centre
The University Of Nottingham
T: 0115 9513836 E: [Email Address Removed]
Please quote ref. ENG/701. This studentship will remain open until filled.
