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    • 14. 发明申请
    • INTELLIGENT VALVE POSITIONER TUNING
    • 智能阀定位器调谐
    • WO01018620A1
    • 2001-03-15
    • PCT/US2000/024380
    • 2000-09-06
    • F16K37/00G05B13/04G05B19/19G05B23/02
    • G05B19/19F16K37/0083G05B13/042G05B2219/36466G05B2219/36467G05B2219/42002G05B2219/42004G05B2219/42031G05B2219/42033G05B2219/42035G05B2219/42128G05B2219/42149Y10T137/0318Y10T137/8158
    • A valve position controller tuning method avoids impact of friction in valve positioner tuning by building a dynamic model of a valve positioner from a monotonic open-loop response of a valve stem position to a change in valve position controller output. To this end, a model form is selected based on the type of pneumatic actuator and relay that controls valve flow modulating of member motion, and the valve position controller is operated in an open-lop mode. The method includes changing a valve position controller output signal to cause the valve positioner to move a valve flow modulating member, connected to valve positioner, monotonically from one stuck position to another stuck position immediately after a motion in that same direction. When a valve stem position reaches a position threshold, a first valve stem position change and a corresponding time change are measured. The method includes measuring valve stem position changes at times that depend on the first measured time change. Using the measured results, valve positioner response parameters are calculated for the selected model form from which valve position controller tuning constants are calculated.
    • 阀位控制器调节方法通过从阀杆位置的单调开环响应到阀位控制器输出的变化构建阀定位器的动态模型来避免阀定位器调节中的摩擦的影响。 为此,基于控制构件运动的阀流量调节的气动致动器和继电器的类型来选择模型,并且阀位置控制器以开路模式操作。 该方法包括改变阀位控制器输出信号,使得阀定位器将与阀定位器相连的阀流量调节元件从一个卡止位置单调移动到紧接在相同方向的运动之后的另一个卡住位置。 当阀杆位置达到位置阈值时,测量第一阀杆位置的变化和对应的时间变化。 该方法包括在取决于第一次测量的时间变化的时候测量阀杆位置变化。 使用测量结果,计算阀门位置控制器调节常数所选择的模型形式的阀门定位器响应参数。
    • 18. 发明授权
    • Control valve with a drive operated by a pressure medium and a position
controller
    • 控制阀带有由压力介质操作的驱动器和位置控制器
    • US5644948A
    • 1997-07-08
    • US459492
    • 1995-06-02
    • Thomas KarteHeiko KresseAlexander KleistWolfgang Backe
    • Thomas KarteHeiko KresseAlexander KleistWolfgang Backe
    • F15B21/08G05D3/12G05D3/14G01N19/02
    • G05D3/12F15B21/087G05D3/14G05B2219/34131G05B2219/41154G05B2219/42128G05B2219/42211G05B2219/45006
    • An apparatus and process for monitoring conditions of a control valve including a valve element operated by a drive controlled by a position controller. A spindle extends into a valve chamber through a dynamic seal and connects the valve element to the drive. The condition of the seal is monitored by measuring start-up time, stopping time and distance travelled. The start-up time relates to the time between application of control current to the position controller and sensing movement of the valve element. The stopping time relates to the interval between application of a second control current to the position controller and sensing the valve element has stopped. The distance travelled relates to distance the valve clement travels during the stopping time. A time difference is determined by subtracting the stopping from the starting time and is calibrated to a seal coefficient of friction. The distance travelled is also calibrated to a seal coefficient of friction. These two coefficients of friction are compared whereby a discrepancy indicates a change in air pressure has occurred during valve operation. These measurements are taken prior to and cyclically during valve operation. The coefficient of friction obtained during valve operation is compared with the coefficient of friction obtained prior to valve operation to indicate a change in the condition of the seal. If a change in air pressure occurred during valve operation, the coefficient of friction obtained by calibrating the travel distance is compared with the coefficient of friction obtained prior to valve operation.
    • 一种用于监视包括由位置控制器控制的驱动器操作的阀元件的控制阀的状态的装置和过程。 主轴通过动态密封件延伸到阀室中,并将阀元件连接到驱动器。 通过测量启动时间,停止时间和行驶距离来监控密封条件。 启动时间与控制电流施加到位置控制器和感测阀元件的运动之间的时间有关。 停止时间与施加第二控制电流到位置控制器之间的间隔以及感测阀元件已停止。 行驶距离与阀门在停车期间行驶的距离有关。 时差通过从起始时间减去停止并被校准为密封摩擦系数来确定。 行进的距离也被校准为密封摩擦系数。 比较这两个摩擦系数,由此这种差异表示在阀操作期间发生空气压力的变化。 这些测量在阀门操作之前和周期性地进行。 将在阀操作期间获得的摩擦系数与在阀操作之前获得的摩擦系数进行比较,以指示密封条件的变化。 如果在阀门运行期间发生气压变化,则将通过校准行驶距离获得的摩擦系数与阀操作之前获得的摩擦系数进行比较。