中文摘要：

在提升管直径为0．06m，高度为5rn的冷态流化床试验装置上，使用基于信号奇异性检测的小波模极大值法，研究鼓泡流态化到湍动流态化的流型转变特性，获得相应的流型转变初始速度。使用压力波动平均振幅法和标准偏差法对压力波动信号进行分析，得到的转变初始速度相互之间的最大标准偏差为10．8％，说明这3种方法均能正确判断鼓泡流态化到湍动流态化的流型转变初始速度。与后两种方法相比，小波模极大值法有使用数据量少、分析速度快的优点。

英文摘要：

A fluidized bed cold model （0.06 m-I.D.x5 mhigh） was established. The study of transition velocity from bubbling fluidization to turbulent fluidization was carried out using wavelet modulus maxima method for the first time. Pressure signal was also analyzed by mean amplitude methods and standard deviation methods. Transition velocity obtained by wavelet modulus maxima method is nearly equal to the results done by the other two methods. The maxima standard deviation of each method for the other is 10.8%, which indicated that all three methods could fulfill a classification accurately. Compared with the other two methods, wavelet modulus maxima method has the virtues of small data bulk and fast analysis processing.