In:
Johnson Matthey Technology Review, Johnson Matthey, Vol. 60, No. 2 ( 2016-04-01), p. 164-175
Abstract:
The application of three-dimensional electrical capacitance tomography (3D-ECT) for the in situ monitoring of a hard boundary or interface has been investigated using imaged phantoms that simulate real-life processes. A cylinder-in-tube phantom manufactured from polyethylene
(PE), a low di-electric and non-conductive material, was imaged using the linear back projection (LBP) algorithm with the larger tube immersed at varying intervals to test the ability of the technique to image interfaces axially through the sensor. The interface between PE and air is clearly imaged and correlates to the known tube penetration within the sensor. The cylinder phantom is imaged in the centre of the sensor; however, the reduction in measurement density towards the centre of the ECT sensor results in reduced accuracy. A thresholding method, previously applied to binary
systems to improve the imaged accuracy of a hard boundary between two separate phases, has been applied to the 3D-ECT tomograms that represent the PE phantom. This approach has been shown to improve the accuracy of the acquired image of a cylinder of air within a non-conductive PE tube.
Type of Medium:
Online Resource
ISSN:
2056-5135
DOI:
10.1595/205651316X691537
Language:
English
Publisher:
Johnson Matthey
Publication Date:
2016
detail.hit.zdb_id:
2858612-8
