Electrodes Optimization for Magnetic Inductive Flowmeter in Partially Filled Conduit

As with the most of established magnetic inductive flowmeters(MIF) methods for measuring the level of the measuring line, the accuracy of induction flowmeters are strongly affected by the shape of the electrodes. In order to improve the sensitivity of measurement of the filling degree with the flow in the partially full conduit, the position and the circumference of measuring line that the electrodes encompass should be taken into consideration. In this paper, the electrodes are optimized by improving the sensitivity of the measurement of the fluid level and manipulating the weight function, which reduces the influence by the distorted flow profiles. A new finite element procedure is presented to study the voltage output between various shapes of the horizontally-opposed electrodes. Then, the relationship between the sensor sensitivity and fluid level is further obtained. Optimal shape of the electrodes is obtained based on the sensitivity and weight function theory.