超声衰减法测量颗粒粒度大小  

Particle Sizing Based on Ultrasonic Attenuation

作　　者：苏明旭[1] 蔡小舒[1] 黄春燕[1] 徐峰[1] 李俊峰[1] 

机构地区：[1]上海理工大学动力工程学院颗粒与两相流测量技术研究所,上海200093

出　　处：《仪器仪表学报》2004年第z1期1-2,共2页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金项目(50176033);上海理工大学博士启动基金资助。

摘　　要：提出一种基于两个频率下超声衰减系数测量,并结合ECAH超声衰减模型得到悬浊液中颗粒平均粒径的方法。并通过对亚微米范围的钛白粉悬浊液在1和2MHz频率下进行测量。测量结果与消光法测量进行对比,表明该方法应用到颗粒粒度大小测量是切实可行的。It presents a particle sizing method based on the principle of ultrasonic attenuation (UA) with two frequencies. As a theoretical basis, the ECAH ultrasonic model is employed to predict the attenuation. And experiments of aqueous TiO_2 suspensions are carried out to measure the particle mean size, in which ultrasonic signal has been generated and received by transducers with fixed frequencies 1 and 2MHz. The ultrasonic measurement results are compared with light extinction method measurement, which shows this method has a good foreground for particle sizing.

关 键 词：超声衰减 颗粒测量 傅氏变换 

分 类 号：TH7-55[机械工程—仪器科学与技术]