Abstract The methods of accurate measurement on the real-time solid mass flow rate are very limited, especially for non-intrusive measuring approaches. This paper presents a non-intrusive measurement system on solid mass flow rate. The measuring principle is based on microwave attenuation theory and microwave Doppler Effect. A series of experiments have been carried out to test the microwave measurement method. The effects of particle properties in terms of size and relative permittivity on the measuring results have been carefully discussed. The correlations between the output signal and the solid mass flow rate have been investigated. The experiment results show that the size and material of the measured solids can significantly influence the reflected microwave signal. To improve the measurement accuracy, the correlation related on the functions of particle diameter and permittivity is proposed for the solid mass flow rate. Furthermore, the experiments under the unsteady flow condition confirm that this method is promising to be applied in the actual industrial processes.

中文翻译：

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非侵入式微波法测量固体质量流量

摘要 实时固体质量流量的精确测量方法非常有限，尤其是非侵入式测量方法。本文介绍了一种非侵入式固体质量流量测量系统。测量原理基于微波衰减理论和微波多普勒效应。已经进行了一系列实验来测试微波测量方法。已经仔细讨论了粒子特性在尺寸和相对介电常数方面对测量结果的影响。已经研究了输出信号和固体质量流量之间的相关性。实验结果表明，被测固体的尺寸和材质对反射微波信号有显着影响。为提高测量精度，提出了固体质量流量与粒径和介电常数函数的相关性。此外，非定常流动条件下的实验证实该方法有望应用于实际工业过程。