U形管科里奥利质量流量计的灵敏度研究  

Study on sensitivity of U-shape Coriolis mass flowmeter

作　　者：罗凡[1,2] 廖俊必[1] 赵普俊[2] 黄虎成[2] 肖文[2] 

机构地区：[1]四川大学测试与控制工程系,成都610065 [2]中国测试技术研究院,成都610021

出　　处：《仪器仪表学报》2012年第2期255-262,共8页Chinese Journal of Scientific Instrument

基　　金：四川省科技厅科技支撑计划(2009GX0004);四川省经济与信息化委员会新兴产业发展计划资助项目

摘　　要：根据U形管科里奥利质量流量计的信号产生特点,提出了一种时间差推算理论。将科氏力的动态响应过程转化为静态力学状态,并创新地运用超静定结构中的变形比较法求解出U形振动管两侧在科氏力的作用下产生的时间差,清晰地建立了灵敏度与振动管关键尺寸之间的关系。首次将振动管的扭转刚度引入时间差的计算,因此,较之传统的简化算法,该方法具有更高的精度和普适性,同时,也为其他管型的科里奥利质量流量计设计提供了理论基础。According to the characteristics of the signal generated by Coriolis force in Coriolis mass flowmeter, the re- search puts forward a new method for calculating the time difference. The key of this theory is converting the dynamic response into static condition in Coriolis mass flowmeter, innovatively using the principle of deformation comparison method to figure out the time difference caused by Coriolis force in U-shape tube, and clearly establishing the rela- tionship between sensitivity and the dimension of the tube. The torsional rigidity of the tube is first introduced into time difference calculation; this method has higher precision and wider applicability than conventional methods, which provides a theoretical foundation for the design of Coriolis mass flowmeters with other tube shapes.

关 键 词：科里奥利质量流量计 变形比较法 时间差 灵敏度 

分 类 号：TH814.6[机械工程—仪器科学与技术]