Sensor Optimization and Influencing Factor Analysis of Gas Content by Capacitive Method

This paper studies and designs a double-ring capacitive sensor gas content detection system, in order to solve the problems of low detection accuracy of traditional gas-liquid two-phase flow gas content and the influence of factors such as inclination angle and flow pattern in actual measurement. The sensor is designed and optimized based on COMSOL simulation software, the influence of electrode width and spacing on the sensitivity uniformity index is analyzed, and the optimized structural parameters of the sensor are obtained. Simulation and experimental results show that the double-loop capacitive sensor measurement system has good linearity and a small average relative error (0.4%). The inclination angle of the pipe and the flow pattern will have a certain influence on the measurement of the sensor.