Skip to main content

Volume and surface measurements of flaws in polymeric insulators using X-ray computed tomography

Buy Article:

$25.00 plus tax (Refund Policy)

Abstract:

This paper presents results of a technique developed to measure the volume and the surface area of flaws in pin-type polymer insulators used in electrical energy distribution networks by means of computed tomography (CT). The tomography images were reconstructed using 180 digital radiographs (projections) acquired from a high-resolution system (a 50 m 50 m, a-Si pixel detector). An acrylic phantom containing 12 cylindrical holes of known volume was used to test the tomography measurement system. In order to improve the quality of tomography images, two procedures were used, namely, subtraction of dark image and correction of light field, as well as a sequence of filters such as the median and the Gaussian. Image processing techniques were used for the segmentation of flaws in the CT images. The Marching Cubes algorithm was used in the visualisation process and the Decimation algorithm was used to obtain volume and surface area measurements of flaws. The programs were developed in C and Java, using the VTK Visualisation Toolkit library. The results obtained showed to be satisfactory for quantitatively and qualitatively analysing the effects of electrical discharges in insulation materials such as insulators and cables.

Keywords: Computed tomography; Marching Cubes; VTK Visualisation Toolkit; electrical components; image processing; non-destructive testing

Document Type: Research Article

DOI: http://dx.doi.org/10.1784/insi.2008.50.10.554

Affiliations: 1 Institute of Technology for Development LACTEC, Caixa Postal 19067, 81531-990, Curitiba, PR, Brazil. contatowalmorgodoi.com, vitoldolactec.org.br; , http://w3.org/1999/xlink, Tel: 55 41 3361-6162, URL: http://www.lactec.org.br

Publication date: October 1, 2008

More about this publication?
bindt/insight/2008/00000050/00000010/art00004
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more