基于ERT和WLS-SVM的气液两相流空隙率测量  

Voidage Measurement of Gas-Liquid Two-Phase Flow Based on ERT and WLS-SVM

作　　者：彭珍瑞[1] 张慧[1] 祁文哲[1] 

机构地区：[1]兰州交通大学机电工程学院,甘肃兰州730070

出　　处：《测控技术》2008年第8期14-16,19,共4页Measurement & Control Technology

基　　金：甘肃省自然科学基金资助项目(3ZS062-B25-016);兰州交通大学"青蓝"人才资助项目

摘　　要：利用ERT传感器提供的电阻测量信息,基于加权最小二乘支持向量机(WLS-SVM),提出了一种气液两相流空隙率测量的新方法。该方法首先由ERT电阻传感器阵列获取电阻测量值,接着提取测量值的主成分,将主成分作为已经建立的WLS-SVM空隙率模型的输入,计算得到空隙率值。测量结果表明,提出方法的空隙率测量误差小于8%,实时性可以满足现场要求。Based on the resistance information obtained by the sensor of electrical resistance tomography（ERT） , through weighted least squares support vector machine（WLS-SVM）, a new approach for voidage measurement of gas-liquid two-phase flow is put forward. In this method, the resistance measurement values are obtained by ERT sensor. Then the principle components of these measurements are abstracted by principle component analysis （PCA）. The principle components are the inputs of the established voidage measurement model. The output of the model is voidage value. Experimental results show that the voidage measurement error of the new method is less than 8% and the real-time performance can satisfy the field requirement.

关 键 词：空隙率 电阻 加权最小二乘支持向量机 两相流 

分 类 号：O359.1[理学—流体力学]