Coriolis mass flowmeter (CMF) is generally regarded as a linear system when the vibration amplitude of the measuring tube is relatively small, but the spectrum of its output signals still show existence of some multip...Coriolis mass flowmeter (CMF) is generally regarded as a linear system when the vibration amplitude of the measuring tube is relatively small, but the spectrum of its output signals still show existence of some multiple frequency components. Taking into consideration the nonlinear factors and external excitation, the motion equations of the CMF straight measuring tube are estab- lished by properly simplifying the boundary conditions of the measuring tube and integrating the mathematical model of the CMF sen...展开更多
针对目前企业内部定期对电磁流量计进行期间核查时,核查方法自动化程度低,核查周期制定不合理的问题,通过图像识别方式采集电磁流量计的累积流量数据,采用标准表法对电磁流量计进行期间核查;通过线性维纳退化模型对电磁流量计的核查数...针对目前企业内部定期对电磁流量计进行期间核查时,核查方法自动化程度低,核查周期制定不合理的问题,通过图像识别方式采集电磁流量计的累积流量数据,采用标准表法对电磁流量计进行期间核查;通过线性维纳退化模型对电磁流量计的核查数据进行处理,智能预测电磁流量计的期间核查周期;基于该核查方法与周期预测方法研制一套可移动式核查装置,对电磁流量计进行原位核查。核查装置扩展不确定度为0.08%(k=2),满足技术指标0.15%(k=2)的要求;使用核查装置对E+H Proline Promag H 500进行核查实验,最大示值误差为0.2%,与最大允许误差±0.5%相比,满足性能指标要求;使用线性维纳退化模型对E+H Proline Promag H 500进行核查周期预测,预测核查周期的均方根误差为6.04 d。该核查方法与周期预测方法均具有良好的可靠性,可用于对电磁流量计的期间核查。展开更多
基金National High-tech Research and Development Pro-gram (2008AA042207)
文摘Coriolis mass flowmeter (CMF) is generally regarded as a linear system when the vibration amplitude of the measuring tube is relatively small, but the spectrum of its output signals still show existence of some multiple frequency components. Taking into consideration the nonlinear factors and external excitation, the motion equations of the CMF straight measuring tube are estab- lished by properly simplifying the boundary conditions of the measuring tube and integrating the mathematical model of the CMF sen...
文摘针对目前企业内部定期对电磁流量计进行期间核查时,核查方法自动化程度低,核查周期制定不合理的问题,通过图像识别方式采集电磁流量计的累积流量数据,采用标准表法对电磁流量计进行期间核查;通过线性维纳退化模型对电磁流量计的核查数据进行处理,智能预测电磁流量计的期间核查周期;基于该核查方法与周期预测方法研制一套可移动式核查装置,对电磁流量计进行原位核查。核查装置扩展不确定度为0.08%(k=2),满足技术指标0.15%(k=2)的要求;使用核查装置对E+H Proline Promag H 500进行核查实验,最大示值误差为0.2%,与最大允许误差±0.5%相比,满足性能指标要求;使用线性维纳退化模型对E+H Proline Promag H 500进行核查周期预测,预测核查周期的均方根误差为6.04 d。该核查方法与周期预测方法均具有良好的可靠性,可用于对电磁流量计的期间核查。
