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14 条记录 (耗时 0.01 秒)

    MULTIVARIABLE FLUID FLOW MEASUREMENT DEVICE WITH FAST RESPONSE FLOW CALCULATION
    1.
    发明公开
    MULTIVARIABLE FLUID FLOW MEASUREMENT DEVICE WITH FAST RESPONSE FLOW CALCULATION 有权
    潮流计算的更多尺寸工艺流程人计短响应时间

    公开(公告)号：EP2347224A1

    公开(公告)日：2011-07-27

    申请号：EP09748192.3

    申请日：2009-10-27

    申请人： Rosemount, Inc.

    发明人： KLEVEN, Lowell, A. ,  WIKLUND, David, E.

    IPC分类号： G01F1/34 ,  G05D7/06

    CPC分类号： G01F1/363 ,  G01F1/50 ,  G01F1/88

    摘要： A process fluid flow device (12) includes process communication circuitry (20), a processor (26), and measurement circuitry (28). The process communication circuitry (20) is configured to communicate with at least one additional process device. The processor (26) is coupled to the process communication circuitry (20) and is configured to execute instructions to provide a plurality of cycles, wherein each cycle includes a number of flow- related calculations. Measurement circuitry (28) is operably coupleable to a plurality of process variable sensors to obtain an indication of differential pressure during each cycle, and to obtain static pressure, and process fluid temperature. The processor (26) is configured to compute a process fluid flow value using a current differential pressure sensor indication and at least one flow-related value calculated during a previous cycle. The process communication circuitry (20) communicates the computed process fluid flow value to the at least one additional process device.

    FLOWMETER WITH PITOT TUBE WITH AVERAGE PRESSURE
    4.
    发明公开
    FLOWMETER WITH PITOT TUBE WITH AVERAGE PRESSURE 失效
    带有平均线的压力PITOTDURCHFLUSSMESSER

    公开(公告)号：EP0871848A1

    公开(公告)日：1998-10-21

    申请号：EP96945447.0

    申请日：1996-12-31

    申请人： ROSEMOUNT INC.

    发明人： WIKLUND, David, E. ,  BISCHOFF, Brian, J.

    IPC分类号： G01F1

    CPC分类号： G01F1/46

    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.

    BI-DIRECTIONAL DIFFERENTIAL PRESSURE FLOW SENSOR
    6.
    发明公开
    BI-DIRECTIONAL DIFFERENTIAL PRESSURE FLOW SENSOR 有权
    双向差分流量传感器

    公开(公告)号：EP1269027A2

    公开(公告)日：2003-01-02

    申请号：EP01916156.1

    申请日：2001-02-22

    申请人： ROSEMOUNT INC.

    发明人： WIKLUND, David, E. ,  KROUTH, Terrance, F. ,  BRODEN, David, A. ,  SCHUMACHER, Mark, S.

    IPC分类号： F15B15/28 ,  G01F1/00

    CPC分类号： G01F1/50 ,  F15B15/2838 ,  G01F1/40 ,  G01F1/42 ,  G01F1/44

    摘要： Disclosed is a bi-directional differential pressure flow sensor (10) that is configured to establish a direction and flow rate of a fluid flow. The flow sensor (10) includes a flow restriction member (20), a differential pressure sensor (22), and processing electronics (50). The flow restriction member (20) is configured to produce a pressure drop when placed inline with the fluid flow. The differential pressure sensor (22) is embedded or integral with the flow restriction member and produces a differential pressure signal that is indicative of the pressure drop. The processing electronics (50) produces a flow rate signal that is indicative of the direction and flow rate of the fluid flow as a function of the differential pressure signal.

    MULTIVARIABLE PROCESS FLUID FLOW DEVICE WITH ENERGY FLOW CALCULATION
    8.
    发明公开
    MULTIVARIABLE PROCESS FLUID FLOW DEVICE WITH ENERGY FLOW CALCULATION 审中-公开
    与能量流计算多变量型工艺流程设备

    公开(公告)号：EP2283324A1

    公开(公告)日：2011-02-16

    申请号：EP09751675.1

    申请日：2009-05-22

    申请人： Rosemount, Inc.

    发明人： WIKLUND, David, E. ,  KLEVEN, Lowell, A.

    IPC分类号： G01F1/34 ,  G01N33/22 ,  G05B19/00

    CPC分类号： G01F1/363 ,  G01F1/50 ,  G01F1/88 ,  G01F15/046 ,  G01K17/06

    摘要： A process fluid flow device includes a power supply module, a process communication module, a processor and measurement circuitry. The process communication circuitry is coupled to the power supply module and to the processor. The measurement circuitry is operably coupleable to plurality of process variable sensors to obtain an indication of differential pressure, static pressure and process fluid temperature. The processor is configured to compute process fluid mass flow, and to use the static pressure and process fluid temperature to obtain an energy per unit mass value relative to the process fluid and to provide an energy flow indication.