用于电磁流量计信号调理的数模混合最优滤波方法

针对采用低频矩形波励磁的电磁流量计感应信号、干扰和噪声信号的特性,提出了基于数模混合最优滤波方法的信号调理方案。对数模混合最优滤波方法的原理和消除、抑制干扰和噪声的机制进行了理论分析,分析了该方法的原理误差及补偿方法,在此基础上设计了电磁流量计。理论分析和检定实验表明数模混合最优滤波法是一种有效消除微分噪声的方法,它既能除去电磁流量计的微分噪声,又能有效降低其他各类噪声干扰,从而获得更高信噪比的流量信号。...

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Bibliographic Details
Published in电机与控制学报 Vol. 19; no. 1; pp. 102 - 106
Main Author 庞兵 张震 梁原华
Format Journal Article
LanguageChinese
Published 哈尔滨理工大学 测控技术与通信工程学院,黑龙江 哈尔滨,150080 2015
Subjects
信号调理
信噪比
噪声特性
数模混合最优滤波
电磁流量计
噪声特性
signal-noise rati-o
signal conditioning
信号调理
optimal mixed-signal filter
noise characteristics
信噪比
电磁流量计
数模混合最优滤波
electromagnetic flowmeter
Online AccessGet full text
ISSN1007-449X
DOI10.15938/j.emc.2015.01.015

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Summary:针对采用低频矩形波励磁的电磁流量计感应信号、干扰和噪声信号的特性,提出了基于数模混合最优滤波方法的信号调理方案。对数模混合最优滤波方法的原理和消除、抑制干扰和噪声的机制进行了理论分析,分析了该方法的原理误差及补偿方法,在此基础上设计了电磁流量计。理论分析和检定实验表明数模混合最优滤波法是一种有效消除微分噪声的方法,它既能除去电磁流量计的微分噪声,又能有效降低其他各类噪声干扰,从而获得更高信噪比的流量信号。
Bibliography:23-1408/TM
PANG Bing, ZHANG Zhen, LIANG Yuan-hua （ College of measure-control technology and communication engineering, Harbin University of Science and Technology, Harbin 150080, China）
electromagnetic flowmeter;signal conditioning;optimal mixed-signal filter;signal-noise ratio;noise characteristics
According to the characteristics of inductive signal, interference and noise from electromagnetic flowmeter excited with low frequency square waveform, an optimal mixed-signal filtering method was pro-posed. The principle of optimal mixed-signal filtering method and its mechanism on the way to eliminate or suppress interference and noise were analyzed theoretically. The principle deviation and its compensa-tion of this method were also analyzed . An electromagnetic flowmeter was designed to apply this method. Theoretical analysis and the result of verification experiment both show that the optimal mixed-signal filte-ring method is an effective method to eliminate differential noise. In electromagnetic flowmeter, not
ISSN:1007-449X
DOI:10.15938/j.emc.2015.01.015