振动管式流体密度传感器机理的进一步研究

Advanced Study on the Mechanism of Vibrating-Tube Fluid Density Transducer

从弹性振动理论出发,考虑了振动管、管内流体以及二者之间的各种影响因素,建立了振动管新的更加完善的振动方程,并用Galerkin法对方程求解,推导出振动管谐振频率与流体密度之间的关系。利用两种形式密度传感器进行的实验验证表明,根据本文所推导的理论公式进行计算的结果较符合实际。

A vibration equation considering the influence of the vibrating tube and the fluid in it as well as the mutual effect between them is given. After solving the equation by Galerkin method, a new relation is obtained between the resonant frequency of the transducer and the density of the fluid. Experiments show that this relation will lead to more satisfactory results.