Page 170 - 《应用声学》2023年第1期

第 42 卷 第 1 期 Vol. 42, No. 1
2023 年 1 月 Journal of Applied Acoustics January, 2023

⋄ 研究报告 ⋄

基于超声回波重组相位分析的颗粒粒径测量方法 ∗

谭 红 王力虎 † 梁维刚 陈代勇 郁 凡

(广西师范大学物理科学与技术学院 桂林 541004)

摘要：将超声波作用于沉降的颗粒时，由于颗粒的移动，超声回波会出现相位差异。该文通过对测量杯中某一
确定深度处的回波信号进行相位分析和重组，发现重组后信号的频率可以计算出粒径；并分别对两种不同粒
径分布的聚甲基丙烯酸甲酯 (PMMA) 微球悬浮液进行了超声波信号采样重组和去噪的实验，实验结果经小波
时频方法分析后，证实了颗粒粒径分布与重组信号频率构成的确存在很高的相关性。
关键词：超声波；颗粒沉降；相位；粒径测量
中图法分类号: TB559; TH89 文献标识码: A 文章编号: 1000-310X(2023)01-0166-06
DOI: 10.11684/j.issn.1000-310X.2023.01.022

Particle size measurement based on ultrasonic echo phase analysis and
recombination

TAN Hong WANG Lihu LIANG Weigang CHEN Daiyong YU Fan

(College of Physics Science and Technology, Guangxi Normal University, Guilin 541004, China)

Abstract: When ultrasonic waves are applied to detect the settling particles, the phase differences of ultrasonic
echoes will appear owing to particle movement. In this paper, by analyzing the phase and recombining the
signal of the ultrasonic echoes at a determined depth in the measuring cup, it is found that the frequency of the
recombined signal can calculate the particle size. In addition, the experiments of sampling and recombining
ultrasonic signals were conducted for two suspensions of polymethyl methacrylate (PMMA) with different
particle size distributions. The experimental results were analyzed by wavelet time-frequency method, and it
was confirmed that there was indeed a high correlation between the particle size distribution and the frequency
distribution of the combined signal.
Keywords: Ultrasound; Settling particles; Phase; Particle size measurement

2022-06-29 收稿; 2022-09-02 定稿
广西研究生教育创新计划资助项目 (XYCS22020050)
∗
作者简介: 谭红 (1996– ), 女, 重庆人, 硕士研究生, 研究方向: 超声波检测。
† 通信作者 E-mail: lhwang@mailbox.gxnu.edu.cn