谐振式环形管科里奥利质量流量计  

Resonant Loop-tube Coriolis Mass Flow Meter

作　　者：蔡体菁[1] 唐国建[1] 

机构地区：[1]东南大学仪器科学与工程系,南京210096

出　　处：《压电与声光》2001年第3期189-191,共3页Piezoelectrics & Acoustooptics

基　　金：江苏省工业攻关项目! ( BE2 0 0 0 0 0 6)

摘　　要：给出了一种建立在驱动模态与科里奥利 (coriolis)模态固有频率相等、连续信号处理技术和频率跟踪法基础上的谐振式环形管 coriolis质量流量计。在驱动模态与 coriolis模态固有频率相等的条件下 ,当环形管有流体流过时环形管就处于谐振状态 ,因此具有较高的灵敏度 ;由于该质量流量计输出信号是连续的 ,所以可采用连续信号处理技术 ,得到较高的检测精度 ;流体密度的检测是采用自激振荡原理和频率跟踪法得到的。A new resonant loop tube coriolis mass flow meter(RLCMFM)is described It is based on the equality of natural frequencies of the drive mode and the coriolis mode,continuous signal process technique and frequency tracking.When fluid flows in the loop tube and under the condition of equality of natural frequencies of the drive mode and the coriolis mode,the loop tube is in resonant state,therefore it has very high sensitivity to mass flow.Because output signal is continuous,using continuous signal process technique can be used to increase its measurement precision.Fluid density is measured by self push resonant principle and frequency tracking method.The paper also presents the mathematical model and measurement principle of the mass flow meter in detail.

关 键 词：科里奥利质量流量计 谐振式环形管 数学模型 频率跟踪 自激振荡 

分 类 号：TH814[机械工程—仪器科学与技术]