An ECT/ERT dual-modality system based on an internal electrode sensor

摘要

Electrical capacitance tomography (ECT) and electrical resistance tomography (ERT) are the two most developed ET methods nowadays. ERT is suitable to measure the two-phase flow in which conductive medium is taken as the continuous phase, while ECT is suitable to measure the two-phase flow in which non-conducting medium is taken as the continuous phase. In order to broaden the measurement range, generally combing the both ECT and ERT modalities to form an ECT/ERT dual-modality system is used. Therefore, this paper presents a novel unified sensor which can operate in both ECT and ERT modality and a series of experiments for oil-water two phase flow measurement are studied based on this dual-modality sensor with the inner electrode. The results demonstrate that the dual-modality system can operate stably, flexibly, and expand the measurement range.