Abstract This work presents the design and the validation of a non-intrusive capacitance - based densimeter, for the on-line measurement of solid fraction in a slurry pipe flow. An asymmetrical type capacitance sensor was designed by means of numerical electric field analysis. The simulations conducted at different solid volume fractions revealed that the sensor is not sensitive to the distribution and the size of the solid particles. The simulations also provided a preliminary sensor calibration to link the capacitance values to the solid volume fraction (i.e., slurry density). The numerical calibration of the sensor was verified during slurry transport experiments with a mixture of HFE 7200 and sucrose crystals, while the reference density measurement was provided by a Coriolis flow meter. The validation proved that the capacitance sensor correctly measures the density of a downward slurry pipe flow with an accuracy of ± 0.5% rdg, in the range of solid volume fraction between 0% and 29%.

中文翻译：

---

一种用于浆液密度测量的电容式传感器的设计和验证

摘要 这项工作介绍了一种基于非侵入式电容的密度计的设计和验证，用于在线测量泥浆管流中的固体分数。采用数值电场分析方法设计了一种非对称型电容传感器。在不同固体体积分数下进行的模拟表明，传感器对固体颗粒的分布和尺寸不敏感。模拟还提供了初步传感器校准，以将电容值与固体体积分数（即浆液密度）联系起来。在使用 HFE 7200 和蔗糖晶体的混合物进行浆料输送实验期间验证了传感器的数值校准，而参考密度测量由科里奥利流量计提供。