发明公开
- 专利标题： FLOWMETER WITH PITOT TUBE WITH AVERAGE PRESSURE
- 专利标题（中）： 带有平均线的压力PITOTDURCHFLUSSMESSER
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申请号： EP96945447.0申请日： 1996-12-31
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公开(公告)号： EP0871848A1公开(公告)日： 1998-10-21
- 发明人: WIKLUND, David, E. , BISCHOFF, Brian, J.
- 申请人： ROSEMOUNT INC.
- 申请人地址： 12001 Technology Drive Eden Prairie, MN 55344 US
- 专利权人： ROSEMOUNT INC.
- 当前专利权人： ROSEMOUNT INC.
- 当前专利权人地址： 12001 Technology Drive Eden Prairie, MN 55344 US
- 代理机构： Cross, Rupert Edward Blount, et al
- 优先权： US19960582905 19960104
- 国际公布： WO1997025595 19970717
- 主分类号： G01F1
- IPC分类号： G01F1
摘要：
A transmitter (10) in a process control system for measuring flow rate measures total pressure (PTOT) and differential pressure (h) of process fluid flowing through a process pipe. The static pressure (PSTAT) is determined based upon the total pressure (PTOT). The calculated static pressure is used to determine the fluid density (ς) and the gas expansion factor (Y1) of the process fluid flowing in the pipe (12). This information is used to calculate flow rate (Q) of the process fluid.
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