专利名称：CORIOLIS MASS FLOW RATE METER HAVING
ADJUSTABLE PRESSURE AND DENSITYSENSITIVITY
发明人：CAGE, Donald, R.,SCHOTT, Michael, N.申请号：US1995005036申请日：19950418公开号：WO95/029385P1公开日：19951102
摘要：Several Radial Mode Coriolis mass flow rate meter geometries and electroniccircuits are described that may be made to be sensitive to pressure or density changes. Inone embodiment, the meter comprises: (A) a flow conduit (1) for containing a fluid havinga physical characteristic, the fluid (21) adapted to flow in the conduit at an unknown rate,(B) a drive circuit (16, 17) for creating a vibration in the flow conduit (1), the fluid (21)altering the vibration as a function of the physical characteristic and the flow rate, (C) adetector circuit (10-15) for measuring the altered vibration at a working point (38, 55) andproducing a signal representing an uncompensated mass flow rate (M1) of the fluid and(D) a computation circuit for calculating a compensated mass flow rate (M2) of the fluidproportional to the uncompensated rate by 1/Φ1n, where Φ1 is a driven naturalfrequency of the flow conduit and n is a number chosen as a function of the workingpoint, the compensated rate thereby reduced of effects of the physical characteristic. Aunique mathematical algorithm is also described that allows for a much wider variety ofdesign geometry while maintaining insensitivity to pressure or density without having tomeasure or compensate for either. In addition, a method is described that allows for the
accurate measurement and compensation of both pressure and density.
申请人：DIRECT MEASUREMENT CORPORATION
地址：US
国籍：US
代理机构：HITT, David, H.,RUTETZKI, Andreas
更多信息请下载全文后查看
因篇幅问题不能全部显示，请点此查看更多更全内容