一种用于涡街流量计的差分电荷放大器的研制  

Development of Differential Charge Amplifier for Vortex Flowmeter

作　　者：刘三山[1] 徐科军[1,2] 朱志海[1] 

机构地区：[1]合肥工业大学自动化研究所,合肥230009 [2]工业自动化安徽省工程技术研究中心,合肥230009

出　　处：《自动化与仪表》2008年第11期8-11,50,共5页Automation & Instrumentation

基　　金：863计划资助项目(2007AA04Z180)

摘　　要：电荷放大器是涡街流量计信号调理电路中的一个关键模块,对整个测量系统的性能起到重要作用。该文设计一种基于经典仪用放大器结构的电荷放大器,并进行了理论分析、模型仿真和电路实验,证明该电荷放大器能够有效地改善对低速流体的测量性能,有助于扩展涡街流量计的量程比。The charge amplifier is a key element for signal conditioning circuit of vortex flowmeter,and it plays an important part in the performance of the whole system.A kind of charge amplifier is designed based on the configu-ration of classical instrumentation amplifier in this paper.Its theoretical analysis,model simulation and circuit experi-ment are carried out.The results show that it can improve the measurement performance of low-velocity liquid,and extend the turn-down ratio of vortex flowmeter.

关 键 词：涡街流量计 电荷放大器 仪用放大器 

分 类 号：TH814[机械工程—仪器科学与技术]