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发展了一种基于超声检测原理的颗粒两相体系颗粒粒度、密度和浓度的测量方法。设计了一套脉冲超声波多参数测量装置和系统,以SiC悬浊液为研究对象,测得了其3～6 MHz的声衰减谱。利用反演算法,获得了SiC颗粒粒度分布曲线,并将此与电感应法测量结果进行对比,两者比较吻合。同时,采用多次回波技术,获得了多达15次回波信号。利用自行编制的LabVIEW分析程序进行数据处理,计算出颗粒两相体系的密度和浓度,其相对测量误差分别在1.6%和8%以内。
A method to measure particle size, density and concentration of particles in two-phase system based on the principle of ultrasonic testing has been developed. A set of pulsed ultrasonic multi-parameter measuring device and system was designed. Taking SiC suspension as the research object, the sound attenuation spectrum of 3 ~ 6 MHz was measured. Using the inversion algorithm, the particle size distribution curves of SiC particles were obtained, and the results were compared with the results of electric induction method. At the same time, using multiple echo techniques, up to 15 echo signals were obtained. The data was processed by the self-compiled LabVIEW analysis program to calculate the density and concentration of the two-phase system. The relative measurement errors were within 1.6% and 8% respectively.