【摘要】 本文应用时频分析方法,得到压力波动信号的伪Margenau-Hill时频分布图谱PMH(Pseudo Margenau-Hill time-fre-quency distribution)。基于各流型下不同的图谱,探索出一种新的识别流型(鼓泡床、湍流床、快速床)的方法,误识别率仅为5％。与其它方法进行比较,简便可靠,还可用于在线监测。更多还原

【Abstract】 The pseudo Margenau--Hill time--frequency distribution (PMH) maps of pressure fluctuations are ob-tained based on the time--frequency analysis method. According to the different PMH maps under three respectivefluid regimes, this paper comes up with a novel method to detect fluid regimes in the circulating fluidized beds.This method is simple and convenient when compared with other methods and can be utilized on-line to monitorthe f1uid regimes in practice. The experimental results show the recognition error is 5%.更多还原