科氏质量流量传感器性能优化技术与发展

基于科氏质量流量传感器敏感结构设计原理,将具有不确定度分布的科氏质量流量传感器结构参数、被测流体的密度以及测量管的密度作为输入参数,科氏质量流量传感器的固有频率以及检测灵敏度作为输出参数.通过量化各输入参数的离散程度,采用随机收敛分析决定输入参数组合的数量,最终建立了基于样本的随机模型.在考虑加工尺寸误差的同时,详细评估了科氏质量流量传感器各结构参数对其检测灵敏度以及固有频率的相对影响程度,从而获得了其影响的关键因素,为相应传感器敏感结构设计与优化提供一定的理论依据.

The Performance Optimization Techniques and Development of Coriolis Mass Flowmeter

Based on the operation principle of Coriolis mass flowmeter (CMF),the fluid density,measuring tube density and CMF structure parameters are taken into account as input parameters.The CMF inherent frequency and sensitivity are taken as output parameters.Through the dispersion degree of structure parameters is quantified and input parameters' combinations are decided by the convergence analysis,the sample-based stochastic model is established.This model is applied to investigate the relative influence on CMF performance,considering (uncertainty distributions of structure parameters,fluid density and the measuring tube density.The results reveal the relative influences and give the key influence parameters.It is can be used as a reference for design and optimization of CMF.