| 谭 红,王力虎,梁维刚,陈代勇,郁凡.基于超声回波重组相位分析的颗粒粒径测量方法*[J].,2023,42(1):166-171 |
| 基于超声回波重组相位分析的颗粒粒径测量方法* |
| Particle size measurement based on ultrasonic echo phase analysis and recombination |
| 投稿时间：2022-06-29 修订日期：2022-12-27 |
| 中文摘要: |
| 不断发射的超声波脉冲遇到物体会产生成组的稳定回波,将其用于检测沉降的颗粒粒径时由于颗粒的移动,超声回波会出现相位差异,通过对超声回波任一固定深度的幅值信号进行重组和分析,可以得到与颗粒粒径分布相关的频率分布。本文利用UT350超声波脉冲收发器,分别对悬浮液中沉降的两种不同粒径分布的聚甲基丙烯酸甲酯PMMA微球进行超声波信号采样和重组,利用小波时频分析,发现颗粒粒径分布与重组信号频率构成存在很高相关性,可以通过频率的强度占比表征颗粒的含量,得到样品的粒径分布。结果表明,该方法对样品有较好的区分度,可以反应颗粒的粒径分布,具有良好的应用前景。 |
| 英文摘要: |
| Constantly emitting ultrasonic waves will generate stable echoes in groups when they encounter an object. And when they are used to detect the settling particles, the phase differences of ultrasonic echoes will appear owing to particle movement. By recombining and analyzing the amplitude signal of the ultrasonic echoes at any fixed depth, the frequency distribution associated with the particle size distribution can be obtained. In this paper, ultrasonic echo signals were sampled and recombined from two suspensions of polymethyl methacrylate (PMMA) with different particle size distributions, using the UT350 ultrasonic pulse transceiver. After then, using the method of wavelet time-frequency analysis, a strong link was discovered between the particle size distribution and the frequency distribution of the combined signal. In addition, characterizing the content of the particles based on the intensity percentage of the frequency, we obtained the particle size distribution of the samples. The results show that this method has good discrimination for samples, can reflect the particle size distribution of the particles, indicating that it has good prospects for application. |
| DOI：10.11684/j.issn.1000-310X.2023.01.022 |
| 中文关键词: 超声波 颗粒沉降 相位 粒径分布 测量 |
| 英文关键词: Ultrasound Settling particles Phase Particle size distribution Measurement |
| 基金项目:广西研究生教育创新计划项目 |
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