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X-ray image processing for high voltage cable inspection

X-ray image processing for high voltage cable inspection
X-ray image processing for high voltage cable inspection
High voltage polymeric cables can be insulated using an automated extrusion process to a predefined standard up to a maximum continuous length. For longer cables, lengths are joined together manually. Consequently, the manufacturing quality of the cable joint is likely to be lower than that of the cable; therefore joints must be assessed prior to energisation. One method of manually inspecting joints uses conventional X-ray techniques. This could be automated using digital technology and image processing techniques. One possible sensor that could be used to replace the film would be a CCD camera coupled to a scintillating screen. Two post-processing algorithms for inspection of the digital images produced have been implemented; these are a statistical approach using mean, variance, skewness and kurtosis, and a method that equates pixels to Newtonian bodies. In order to verify that digital X-raying of cable joints is a feasible inspection procedure, CCD camera and film images have been taken of three test pieces. The film-based images were converted into a digital format using a high-resolution scanner. Both sets of images were processed using the algorithms. The results of this test show that images generated by the camera are more distinct than film.
1350-2344
187-195
Robinson, A.P.
5935b2be-a3f1-442d-8e3a-424941c06ba6
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Swingler, S.G.
4f13fbb2-7d2e-480a-8687-acea6a4ed735
Sutton, S.J.
571c7136-1eb6-44e1-8979-ca0829469a6b
Robinson, A.P.
5935b2be-a3f1-442d-8e3a-424941c06ba6
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Swingler, S.G.
4f13fbb2-7d2e-480a-8687-acea6a4ed735
Sutton, S.J.
571c7136-1eb6-44e1-8979-ca0829469a6b

Robinson, A.P., Lewin, P.L., Swingler, S.G. and Sutton, S.J. (2005) X-ray image processing for high voltage cable inspection. IEE Proceedings - Science, Measurement and Technology, 152 (4), 187-195.

Record type: Article

Abstract

High voltage polymeric cables can be insulated using an automated extrusion process to a predefined standard up to a maximum continuous length. For longer cables, lengths are joined together manually. Consequently, the manufacturing quality of the cable joint is likely to be lower than that of the cable; therefore joints must be assessed prior to energisation. One method of manually inspecting joints uses conventional X-ray techniques. This could be automated using digital technology and image processing techniques. One possible sensor that could be used to replace the film would be a CCD camera coupled to a scintillating screen. Two post-processing algorithms for inspection of the digital images produced have been implemented; these are a statistical approach using mean, variance, skewness and kurtosis, and a method that equates pixels to Newtonian bodies. In order to verify that digital X-raying of cable joints is a feasible inspection procedure, CCD camera and film images have been taken of three test pieces. The film-based images were converted into a digital format using a high-resolution scanner. Both sets of images were processed using the algorithms. The results of this test show that images generated by the camera are more distinct than film.

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Published date: July 2005
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 261105
URI: http://eprints.soton.ac.uk/id/eprint/261105
ISSN: 1350-2344
PURE UUID: bb899b57-5cfa-46de-819c-3042b1694dec

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Date deposited: 04 Aug 2005
Last modified: 09 Dec 2019 20:14

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Contributors

Author: A.P. Robinson
Author: P.L. Lewin
Author: S.G. Swingler
Author: S.J. Sutton

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