Study on Algorithm of ERT for Voidage Measurement of Two-Phase Flow

Image reconstruction of electrical resistance tomography (ERT) is an ill-posed inverse problem. In this work, a new image reconstruction algorithm of ERT for the measurement of two-phase flow is proposed. Tikhonov regularization principle is introduced to overcome the instability problem of initial image reconstruction. And, ART algorithm is used to improve the image quality of the original reconstructed image. Voidage measurement experiments have been carried out and the results show that the hybrid image reconstruction algorithm can efficiently overcome the ill-posed problem of image reconstruction of ERT and the maximum error of voidage measurement is less than 8%.