CAPACITIVE IMAGING FOR NDE

Lead Research Organisation: University of Warwick
Department Name: Sch of Engineering

Abstract

It is proposed to investigate a technique for NDE known as capacitive imaging. This approach is a non-contact technique, and should be capable of inspecting a wide range of material types, from insulators (including polymers and composites) to metals. It can be used both underwater and in hostile environments (high/low temperatures, radioactive environments etc), and can be scanned over objects. It should thus have wide application to NDE. The technique uses a set of electrodes, placed close to the surface of the material. Interaction of the electric field distribuion with the material leads to changes in signal when the electrical properties of the sample themselves change, leading to the possibility of imaging. A feasibility study, funded by the RCNDE from core funds, demonstrated promising results on a wide range of materials. The present targetted proposal aims to investigate the fundamental properties of this technique further, involving a combination of experiment and FE modelling. It is also planned to extend the instrumentation to switchable arrays for rapid large-area inspection. The technique will be applied to problems of industrial relevance, including the inspection of aerospace structures, and the detection of corrosion under insulators (CUI).

Publications

10 25 50
 
Description The capacitive imaging technique can be used to image defects in a range of mataerials, such as concrete and composites, both of which are important industrial materials.
Exploitation Route Industry may be interested for testing structures.
Sectors Aerospace, Defence and Marine,Construction,Manufacturing, including Industrial Biotechology,Transport

URL http://www2.warwick.ac.uk/fac/sci/eng/research/sensors/aim/other/capacitiveimaging/
 
Description The results have been communicated to the industrial partners in this project, who may have used them for their own inspections.
First Year Of Impact 2010
Sector Aerospace, Defence and Marine,Construction
Impact Types Economic

 
Description AIRBUS OPERATIONS LIMITED 
Organisation Airbus Group
Country France 
Sector Private 
Start Year 2007
 
Description BP Exploration Operating Company Limited 
Organisation BP (British Petroleum)
Department BP Exploration Company
Country United Kingdom 
Sector Private 
Start Year 2007
 
Description National Nuclear Laboratory Ltd 
Organisation National Nuclear Laboratory
Country United Kingdom 
Sector Public 
Start Year 2007
 
Description SHELL GLOBAL SOLUTIONS INTERNATIONAL B.V 
Organisation Shell Global Solutions International BV
Country Netherlands 
Sector Private 
Start Year 2007