Authors: Zhiheng Meng; Jianfei Gu; Yongxin Chou
Addresses: School of Electrical and Automatic Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China ' School of Electrical and Automatic Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China ' School of Electrical and Automatic Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China
Abstract: The present challenge in the ultrasonic process tomography on dispersed small particle systems is that it is hard to obtain the accurate algorithm for reconstruction. For more accurate reconstruction, this work proposes an improved GMRES (Generalised Minimal Residual) algorithm based on generalised minimal residual iteration and mean filtering method. To verify the feasibility of the algorithm for dispersed small particle system visualisation, a linear acoustic attenuation model is developed to obtain the projection data of ultrasonic array. Then, we compared it with the current mainstream reconstruction algorithms under the conditions of the less effective information by solving the underdetermined equations. It is shown that this method can present a high reconstruction precision in the cases of numerical simulations, and reasonably reflect the cross section of dispersed small particle distribution. In the numerical simulations, the imaging accuracy of improved GMRES algorithm can reach about 90%.
Keywords: ultrasonic method; dispersed particle; particulate two-phase flow; back projection; iterative algorithm.
International Journal of Computer Applications in Technology, 2021 Vol.67 No.2/3, pp.176 - 184
Received: 23 Sep 2020
Accepted: 14 Jan 2021
Published online: 17 Mar 2022 *