基于谐振频率的单直管科氏流量计测量管污垢在线检测方法  

On-line Detection Method Based on Resonant Frequency for Dirt in Single Straight Tube Coriolis Mass Flowmeter

作　　者：曹胜强[1] 张海涛[1] 涂亚庆[1] 沈林[1] 陈飞 

机构地区：[1]后勤工程学院后勤信息与军事物流工程系,重庆401331 [2]重庆市澳凯龙医疗器械研究有限公司,重庆401121

出　　处：《仪表技术与传感器》2017年第9期30-33,46,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(61271449;61302175);重庆市自然科学重点基金项目(CSTC201 jcy j BX0017);重庆市首批百名学术学科人才专项项目(渝教人2012-44号);重庆市社会事业与民生保障科技创新专项一般项目(cstc2016shmszx0839)

摘　　要：为保证科氏流量计正常工作,必须定期检测测量管内是否存在污垢。针对目前单直管科氏流量计测量管污垢检测均采用离线检定方式,无法实时监测科氏流量计工作状态的问题,基于振动梁理论,建立了单直管科氏流量计测量管的力学模型,分析了流体流速及污垢对测量管谐振频率的影响规律,提出了一种基于谐振频率的单直管科氏流量计测量管污垢在线检测方法,并利用ANSYS进行了仿真验证。仿真结果表明,该方法可有效实现对单直管科氏流量计测量管污垢的在线检测。To ensure the Coriolis mass flowmeter（ CMF） work properly,the dirt in measuring tube must be checked regularly.At present,dirt of CMFs measuring tube was detected by offline way,the CMF working condition can not be real-time monitoring.Based on the vibration beam theory,the model of the measuring tube of single straight tube CMF was established in this paper.The influence of flowrate and dirt on the resonant frequency of the measuring tube was analyzed.An on-line detection method based on resonant frequency for tube dirt of single straight tube CMF was put forward,which was verified by ANSYS simulation.Simulation results show that the method can effectively detect the dirt of single straight tube CMF on line.

关 键 词：科氏流量计 污垢 谐振频率 ANSYS 

分 类 号：TH715[机械工程—测试计量技术及仪器]