| Electrical Capaciantce Tomography (ECT) technique is a kind of process Tomography (PT) technique based on electrical capacitance sensors.ECT technique has the advantage of being non-intrusive, simple in structure, fast in response, low in cost, wide in application and good in secutity (non-radiation).ECT has gained considerable progress in recent years.As a new technology of two-phase flow parameters detection, ECT has great development potential in the in dustrial application.Image reconstruction algoirthm is an important factor to improve the image reconstruction quality in ECT system research.It reconstructions the medium distribution image of the measured area by limited observation data (measured capacitance data), same as finding the distribution of medium constant of substance in every unit.This dissertation is based on the study of 12-electrode electrical capacitance tomography system.The main work and researching result of this article is as follows:Firstly, By reading a lot of references, the concept, sorts and major detection parameters of two-phase flow is analyzed and concluded.Also the significance for scientific research and industry production is pointed out.Secondly, the principle of the capacitance tomography is analysed and mathematics principle of image reconstruction algorithm is also introduced.Thirdly, introduce several ECT image reconstruction algorithms,analyse and compare these excellences and disadvantages. Genetic Algorithm are used as ECT image reconstruction algorithm in an attempt to improve. |
