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For multi-phase flow in pipelines, the distributions of the individual phases are of significant importance. For this reason a low-energy gamma-ray tomography system has been designed. The set-up uses a 241Am source along with a CdZnTe array to acquire gamma ray attenuation data in different positions of a cross-section plane around a test pipe. A charge sensitive amplifier (CSA) and a fourth-order...
This paper describes the system models that are developed for multi-phase flow CT through the use of the Geant4 simulating software toolkit. Models with five, seven and nine radiation sources are reconstructed. In order to improve the resolution of the CT images reconstructed using conventional algorithms, a cross-entropy minimization technique together with an information extension method is proposed...
As a measure technology for testing parameters of multi-phase flow, electrical capacitance tomography (ECT) has the characteristics of non -intrusion, non -radiation, low cost, fast response, easy to implement. The quality and rate of image reconstruction are critical for application of ECT in practical industries. In this paper, the factors including numberof pixel, shape of finite element, number...
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