Parameter Measurement Fusion Algorithm Based on Choquet Integral

In the dredging field, the concentration of the solid-liquid two-phase flow in the transmission pipeline is one of the most important parameters. It is measured by a radioactive source densitometer currently. However, the densitometer has limited precision, low intelligence level, and high risk of nuclear pollution. Electrical Resistance Tomography (ERT) is a noninvasive visual detection technology with the advantages of high time resolution, no radiation and low cost. So far, three ERT methods for calculating concentration have been proposed, whereas these methods have individual applicable range and complementary characteristics. Hence, in this paper, a Choquet integral-based method is proposed to fuse the calculation results of these three methods towards higher calculation accuracy. Compared with other fusion methods, the proposed method can overcome these problems of inconsistency, uncertainty, and interaction among various concentration calculation methods. Based on actual data from a working dredger, key parameters in the new method are determined and the concentration calculations of the three existing methods are integrated. Compared with the induvial concentration calculation methods, tested results show that the integrated concentration results are more accurate and consistent with the actual situations under typical dredging conditions.