基于谐振频率的U形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 U-shaped Tube Coriolis Mass Flowmeter

作　　者：曹胜强[1] 张海涛[1] 涂亚庆[1] 邵鹏 沈林[1] CAO Sheng-qiang,ZHANG Hai-tao,TU Ya-qing,SHAO Peng,SHEN Ling(Military Logistics ＆ Information Engineering Department,Logistical Engineering University,Chongqing 401311,Chin)

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401311

出　　处：《仪表技术与传感器》2018年第6期24-28,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(CSTC2015jcyj 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。目前,U形管科氏流量计测量管污垢的检测采用离线检定方式,无法实时监测科氏流量计的工作状态。针对这一问题,利用ANSYS仿真分析U形管科氏流量计测量管污垢分布模型,并在此基础之上,对U形管科氏流量计测量管进行力学建模分析,得出污垢及流体流速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科氏流量计测量管污垢在线检测方法。仿真和实验结果表明:该方法可有效实现对U形管科氏流量计测量管污垢的在线检测。To ensure the Coriolis mass flowmeter（ CMFs） work properly,the dirt in measuring tube must be checked regularly.At present,dirt of measuring tube of U-shaped tube CMFs is detected by offline way,the dirt can not be real-time detevted.To solve this problem,the dirt distribution model of U-shaped tube CMFs is analyzed by ANSYS simulation in this paper. Based on the dirt distribution model,the model of the measuring tube of U-shaped tube CMFs is established in this paper.The influence of dirt and flowrate on the resonant frequency of the measuring tube is analyzed.An on-line detection method based on resonant frequency for tube dirt of single straight tube CMFs is put forward.Simulation and experimental results show that the method can effectively detect the dirt of U-shaped tube CMFs 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]