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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >Two-dimensional particle shape analysis from chord measurements to increase accuracy of particle shape determination
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Two-dimensional particle shape analysis from chord measurements to increase accuracy of particle shape determination

机译：通过弦测量进行二维颗粒形状分析，以提高颗粒形状测定的准确性

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摘要

Some in-process two-dimensional particle sizing methods can provide on-line information about the chord length distribution of a population of particles. The objective of this study is to use the chord measurement not only for the size determination but also for the determination of the particle shape. Main results are the non-dimensional aspect ratio or the roundness of the particle. The elongation values can be calculated by three non-dimensional parameters which are derived from the mean, mode or maximal chord length of the number and area based chord distributions. The application of these shape parameters is limited to narrow particle size and shape distributions. The application is demonstrated for coating of elliptical seed particles and spherical pellets (Cellets 1000). An optical probe system (IPP 70, Parsum GmbH, Germany) was used for the measurement of chord lengths during the coating processes. Results of an image analysis were in a good correlation with the results of the chord measurements. The advantage is the simultaneous use of the measured chord lengths for the characterization of the particle size and also the particle shape without any need for additional measurement equipment. Another advantage is the in-line determination of the particle shape without taking a powder sample. (C) 2015 Elsevier B.V. All rights reserved.
机译：一些过程中的二维粒子大小调整方法可以提供有关粒子群体的弦长分布的在线信息。这项研究的目的是将弦测量不仅用于尺寸确定，而且用于颗粒形状的确定。主要结果是无量纲的长径比或颗粒的圆度。伸长率值可以通过三个无量纲参数计算得出，这些参数是基于数量和面积的和弦分布的均值，众数或最大和弦长度得出的。这些形状参数的应用仅限于窄粒度和形状分布。证明了该应用可用于涂覆椭圆形种子颗粒和球形颗粒（Cellets 1000）。在涂覆过程中，使用光学探针系统（IPP 70，德国Parsum GmbH）测量弦长。图像分析的结果与和弦测量的结果具有良好的相关性。优点是可以同时使用测得的弦长来表征颗粒大小以及颗粒形状，而无需其他测量设备。另一个优势是无需粉末样品即可在线确定颗粒形状。 （C）2015 Elsevier B.V.保留所有权利。

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