LAUSR

The electrical capacitance tomography (ECT) is an image-based technology which has been widely used for gas–solid two-phase flow measurement. The solid-phase electrification is an inevitable phenomenon during pneumatic conveying. To reduce the influence of medium electrification on the ECT image reconstruction, a composite sensitivity matrix (CSM) which takes into account the effect of charge electrification is developed in this paper, so that the image reconstruction error can be well suppressed. This paper first analyzes how the medium electrification affects ECT sensitivity field from the perspective of electromagnetic theory. The CSM is then derived accordingly. Simulations and physical experiments are carried out to validate the proposed method. The experimental results show that the relative error and the correlative coefficient of the reconstructed images have been significantly improved comparing with that in traditional approaches. The results support the effectiveness of the proposed method.