Abstract Screw feeders are widely used in powder processes to provide an accurate and consistent flow rate of particles. However this flow rate is rarely measured or controlled. This investigation explores the use of generalised norms and moments from structural-borne acoustic emission (AE) measurements as key statistical indicators for the estimation of powder mass flow rate in a screw feeder. Experimental work was carried out acquiring AE measurements from an industrial screw feeder working with four different types of material at different dispensation rates. Signal enveloping was used in the first place to eliminate high frequency components while retaining essential information such as peaks or bursts caused by particle impacts. Secondly a set of generalised norms and moments was extracted from the signal, and their correlation with mass flow rate was studied and assessed. Finally a general model able to estimate mass flow rate for the four different types of powders tested was developed.

中文翻译：

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使用声发射估算螺旋给料机中的粉末质量流量

摘要 螺旋给料机广泛用于粉体工艺，以提供准确且一致的颗粒流速。然而，这种流速很少被测量或控制。本研究探讨了使用来自结构声发射 (AE) 测量的广义范数和矩作为估计螺旋给料机中粉末质量流量的关键统计指标。进行了实验工作，从工业螺旋进料器中获取 AE 测量值，该进料器以不同的分配速率处理四种不同类型的材料。信号包络首先用于消除高频分量，同时保留基本信息，例如由粒子撞击引起的峰值或爆发。其次从信号中提取一组广义范数和矩，并对它们与质量流量的相关性进行了研究和评估。最后，开发了能够估计四种不同类型粉末的质量流量的通用模型。