Particle characterization in highly concentrated suspensions by ultrasound scattering method
Particle characterization in highly concentrated suspensions by ultrasound scattering method
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DOI：
10.1016/j.sna.2013.02.027
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发表时间：
2013-11-01
影响因子：
4.6
通讯作者：
Auge, J.
中科院分区：
文献类型：
--
作者：
Weser, R.;Woeckel, S.;Auge, J.
介绍了一种利用超声背向散射信号在线表征高浓度悬浮液中随机运动颗粒的方法。代替单个振幅信号，使用多个连续散射声波的统计特征，其表示散射振幅及其随时间的减小。从信号中推导出的这些简单参数与颗粒尺寸和浓度相关，并提供等效信息，如通过常规消光测量计算的衰减，用于颗粒表征。为了通过两个样品对这一假设进行经验验证，将标准偏差的指数下降与用透射模式超声光谱仪测量的衰减进行比较。特别是高颗粒浓度的依赖性。为了提供高空间分辨率和范围-在具有高衰减的介质的情况下-使用具有高带宽和强度的超声波传感器。(C)2013爱思唯尔有限公司版权所有。
A method for inline characterization of randomly moving particles in high concentrated suspensions by measuring the back-scattered ultrasonic signals is described. Instead of the single amplitude signal the statistical features of multiple consecutive scattered sound waves are used that represent the scattering amplitude and its decrease over time. Those simple parameters, deduced from the signal, correlate with the particle size and concentration and deliver equivalent information like the attenuation calculated by conventional extinction measurements for particle characterization. For empirical validation of this assumption by two samples, the exponential decrease of the standard deviation was compared with the attenuation measured with a transmission-mode ultrasonic spectrometer. Especially the dependency for high particle concentration is shown. To provide a high spatial resolution and range - in case of media with high attenuation - ultrasonic sensors with a high bandwidth and intensity are used. (C) 2013 Elsevier B.V. All rights reserved.