基本信息:
- 专利标题: MAGNETIC FLOWMETER WITH DRIVE SIGNAL DIAGNOSTICS
- 专利标题(中):具有驱动信号诊断功能的磁流量计
- 申请号:PCT/US2014/052654 申请日:2014-08-26
- 公开(公告)号:WO2015047624A1 公开(公告)日:2015-04-02
- 发明人: FOSS, Scot, Ronald , DREIER, Jared, James
- 申请人: ROSEMOUNT INC.
- 申请人地址: 8200 Market Boulevard Chanhassen, MN 55317 US
- 专利权人: ROSEMOUNT INC.
- 当前专利权人: ROSEMOUNT INC.
- 当前专利权人地址: 8200 Market Boulevard Chanhassen, MN 55317 US
- 代理机构: CHAMPLIN, Judson, K. et al.
- 优先权: US14/038,065 20130926
- 主分类号: G01F25/00
- IPC分类号: G01F25/00 ; G01F1/58 ; G01F15/02 ; G01F1/60
摘要:
A magnetic flowmeter (2) includes a flowtube (4) arranged to receive a flow of process fluid. A coil (26) is positioned proximate the flowtube (4) and arranged to apply a magnetic field to the process fluid in response to a drive current alternating direction. First and second electrodes (6, 8) are arranged to sense a voltage potential in the process fluid in response to the applied magnetic field. The voltage potential is indicative of flow rate of process fluid through the flowtube. A sensor (52) is coupled to the first and second current paths which has a sensor output related to the drive current. Diagnostic circuitry (40) provides a diagnostic output as a function of a transient change in the sensor output when current flowing through the coil (26) alternates direction.
摘要(中):
磁流量计(2)包括布置成接收工艺流体流的流量管(4)。 线圈(26)位于流量计(4)附近并被布置成响应于驱动电流交替方向向过程流体施加磁场。 第一和第二电极(6,8)被布置成响应于施加的磁场感测过程流体中的电压电位。 电压电位表示通过流量管的工艺流体的流量。 传感器(52)耦合到具有与驱动电流相关的传感器输出的第一和第二电流路径。 当流过线圈(26)的电流交替方向时,诊断电路(40)提供作为传感器输出中的瞬时变化的函数的诊断输出。
IPC结构图谱:
G | 物理 |
--G01 | 测量;测试 |
----G01F | 容积、流量、质量流量或液位的测量;按容积进行测量 |
------G01F25/00 | 用于测量容量、流量、液面或借助容积进行计量的仪表设备的检定或校正 |