【作者】 田金云；

【导师】 徐志强；

【作者基本信息】 中国矿业大学（北京） ， 检测技术与自动化装置， 2013， 博士

【摘要】 分析了当前煤泥水浓度检测方法的不足,提出了利用超声波检测煤泥水浓度的新方法。详细研究了超声波在煤泥水中传播特性及衰减机理。设计了煤泥水浓度超声检测的实验方案。系统研究了气泡、探头频率、颗粒粒径、煤泥水浓度、煤泥水温度以及煤样等因素对声衰减的影响。对几种典型的悬浮液声衰减模型进行了分析,并分别利用这些模型对煤泥水中的声衰减进行了数值计算,在此基础上基于多元回归方法建立了煤泥水浓度超声检测模型,并对模型的准确性进行了验证。设计了煤泥水浓度超声检测系统,并利用该系统进行了煤泥水浓度测量实验,结果表明该系统是有效的。从理论及实验上研究了超声波检测煤泥水浓度的可行性,为超声波煤泥水浓度检测装置的研制提供了可靠的理论及实验依据。更多还原

【Abstract】 A new method using ultrasound to test the concentration of coal slime water was put forward after being analysed the shortages of the methods commonly used. The transmission characteristics and attenuation mechanism of ultrasonic in coal slime water were studied in detail. The experiment scheme of testing concentration was designed. The influences of bubble, frequency of transducers, particle size, coal slime water concentration, temperature, coal samples on acoustic attenuation were studied. The acoustic attenuation in coal slime water has been calculated based on several typical acoustic attenuation models in suspension, and the testing model of coal slime water concentration based on ultrasonic was established by using the multiple regression method, and the model was proved to be correct. The testing system using ultrasonic to test concentration of coal slime water was designed, and the system was proved to be effective according to the experimental results. The feasibility of coal slime water concentration testing via ultrasonic was studied based on theoretical analysis and experiments, providing reliable support for developing the apparatus.更多还原