A self validating digital coriolis mass flow meter an overview
A SEVA instrument, based on the Coriolis mass flow meter is described; its ability to detect and compensate for the effects of two-phase flow has been implemented in a commercial meter.SEVA has been incorporated into a British Standard, which is currently being extended.
This course is designed for those individuals responsible for the installation and maintenance of the Rosemount Model 3051 Fieldbus Pressure Transmitter.
However, two-phase mode (gas-liquid) may cause severe operating difficulties as well as decreasing certitude in measurement. Pearson, "Flow-rate measurement in two-phase flow," Annu.
School of Electrical and Automation Engineering, Hefei University of Technology, Hefei, Anhui 230009, China; 2. IEE Computing & Control Enginerring,2005,16(3),10-16.
The results show that the transmitter can maintain the vibration of the flow tube and realize the flow measurement in two-phase condition.
Digital flowmeter: US,2002/0038186 A1［P］.2002-03-28. ［7］田婧,樊尚春,郑德智.基于FPGA的科氏质量流量计数字闭环系统设计［J］.仪表技术与传感器,2009,(s1):381-383. ［9］徐科军,张瀚.一种科氏流量计的数字信号处理与驱动方法研究 ［J］.计量学报,2004,25 (4):339-343,379. ［10］朱永强,徐科军,李叶,等.基于DSP的数字式科里奥利质量流量变送器硬件设计 ［J］.仪器仪表学报,2009,30(6):348-353. ［11］李苗,徐科军,侯其立,等.数字科氏质量流量计正负阶跃交替激励启振方法 ［J］.仪器仪表学报,2010,31(1):172-177. ［12］李苗,徐科军,朱永强,等.科氏质量流量计的3种驱动方法研究 ［J］.计量学报,2011,32(1):36-39. ［13］徐科军,侯其立,方敏,等.一种科氏质量流量计的数字驱动跟踪方法和系统: CN201110331814.
This concept assumes the availability of internal computing power for self-diagnostics, and of digital communications to convey measurement and diagnostic data.