不同激励波形的超声衰减法颗粒粒度测量  

Particle Size Distribution Measurement by Ultrasonic Attenuation Under Various Excitation Modes of Ultrasound

作　　者：侯典亮[1] 苏明旭[1] 吴健[1] 龚智方[1] 蔡小舒[1] 

机构地区：[1]上海理工大学颗粒与两相流测量研究所,上海200093

出　　处：《中国粉体技术》2012年第4期35-38,共4页China Powder Science and Technology

基　　金：国家自然科学基金项目;编号:51176128;50836003;51076106;上海市教委重点项目;编号:12ZZ142

摘　　要：设计并搭建基于猝发波和脉冲超声波的颗粒粒度表征实验系统,利用一对超声探头构成透射测量模式,采用变声程法,对4种不同浓度碳化硅悬浊液的声衰减谱进行测量,并分析不同激励方式在颗粒粒度表征中的特点。结果表明,2种激励方式的声衰减谱趋势相同,但脉冲波衰减较猝发波衰减要小;采用归一化谱的反演算法求解,得出碳化硅微粉颗粒的粒度分布,发现不同激励方式下的颗粒粒度分布吻合程度较好。An experimental system was established for the aim of burst and pulse waves generation and reception.The variable sound path method and through-transmission mode were adopted during the measurement to obtain the acoustic attenuation spectra of SiC suspensions at four different mass fractions.The characteristics of these two methods were analyzed in the end.The results obtained with three systems reveals the same tendency,while the acoustic attenuation spectrum of pulsed wave is slightly smaller than that of burst waves in value.It is found that the results of inversed particle size distributions exhibit accordance with each other.

关 键 词：超声波 信号激励 粒度表征 

分 类 号：TB34[一般工业技术—材料科学与工程]