用二重互相关算法扩展涡街流量计测量下限  

Extending measured value of vortex flowmeter at lower velocity by using quadratic cross correlation algorthm

作　　者：李小京[1] 

机构地区：[1]天津工业大学计算中心,天津300160

出　　处：《传感器与微系统》2008年第1期25-26,29,共3页Transducer and Microsystem Technologies

基　　金：天津市科技创新专项基金资助项目(06FZZDGX00800)

摘　　要：介绍了采用二重互相关算法对强噪声干扰下的涡街信号进行滤波的原理和具体实现方法。对涡街流量计在测量下限时的信号与噪声情况进行了分析,将二次互相关滤波算法引入涡街信号的数字滤波过程中。给出了具体计算方法和各主要参数的取值规则。在实际使用中取得了良好的效果。The filter principle and the implement method of vortex flowmeter signals with serious noises are introduced by using quadratic cross correlation algorithm. The signal and noise conditions of vortex flowmeter at the lower velocity are analyzied, and quadratic cross correlation algorithm is applied to digital filterine. The specific computation method and the rule of choosing a value to several major parameters are given. The good results are achieved in practical application.

关 键 词：涡街流量计 互相关函数 数字滤波 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]