中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

18 records (took 0.013 seconds)

    Apparatus and method for automatic or manual process control
    3.
    发明授权
    Apparatus and method for automatic or manual process control 失效
    用于自动或手动过程控制的装置和方法

    公开(公告)号：US3882368A

    公开(公告)日：1975-05-06

    申请号：US27185772

    申请日：1972-07-14

    Applicant: WESTINGHOUSE ELECTRIC CORP

    Inventor： CARLETON JAMES T

    IPC: G05B7/02 ,  G05B11/42

    CPC classification number: G05B7/02

    Abstract: Apparatus and a method for achieving bumpless transfer between the manual and automatic modes in either single or multiple loop process control systems. The last stage of the process controller is an integrator which generates the final control element position signal in both the manual and automatic modes. Proportional, first derivative or second derivative actions applied to the measured variable and/or the set point in the first stage of the controller become integral, proportional and derivative actions, respectively, after passing through the integrator. Since the integrator remains in the output circuit and is under control continuously in both modes, bumpless transfer between the manual and automatic modes is achieved without the necessity of matching signals. When two controllers are used in cascade, the speed signal generated by the first stage of the inner loop controller is applied to the integrator stage of the outer loop controller so that it tracks the measured variable of the inner loop while the inner loop is in the manual mode. Only integral action is applied to the set point inputs of the controllers so that the rate of change of the set point signal is not critical.

    Abstract translation: 用于在单个或多个循环过程控制系统中实现手动和自动模式之间的无扰动传递的装置和方法。 过程控制器的最后一个阶段是在手动和自动模式下生成最终控制元件位置信号的积分器。 在控制器的第一阶段应用于测量变量和/或设定点的比例，一阶导数或二阶导数动作分别在通过积分器之后成为积分，比例和微分动作。 由于积分器保持在输出电路中，并且在两种模式下都连续地被控制，所以实现手动和自动模式之间的无扰动传输，而不需要匹配信号。 当级联使用两个控制器时，由内环控制器的第一级产生的速度信号被施加到外环控制器的积分器级，使得它跟踪内循环的测量变量，而内环在 手动模式。 只有控制器的设定点输入才应用积分作用，使得设定点信号的变化率不是关键的。

    Control system for coating continuous webs
    7.
    发明授权
    Control system for coating continuous webs 失效
    用于涂装连续织物的控制系统

    公开(公告)号：US3599600A

    公开(公告)日：1971-08-17

    申请号：US3599600D

    申请日：1969-12-23

    Applicant: WESTINGHOUSE ELECTRIC CORP

    Inventor： CARLETON JAMES T ,  PUTMAN RICHARD E

    IPC: B05C11/10 ,  D06B23/26

    CPC classification number: D21H23/78 ,  D21H5/006 ,  D21H25/08

    Abstract: Described is a system for controlling the amount of coating per unit of area applied to a continuous web which passes through a dip tank and thence through squeeze rolls and one or more drying chambers. The system also incorporates means for controlling tension in a dried web, which tension is a function of the amount of coating applied per unit of area. The foregoing is accomplished by controlling the amount of concentrated coating solution fed to a blending tank, which supplies the dip tank, as a function of web speed; by controlling the pressure exerted on the web by the squeeze rolls as a function of the liquid level in the blending tank to which excess solution from the squeeze rolls and dewatering pads is fed; and by controlling the amount of solvent for the concentrated coating solution fed to the blending tank as a function of the tension in the dried web. The invention additionally includes means for directly monitoring the density of the coating solution in the blending tank and for adjusting that density should it depart from a predetermined set value.

Patent Agency Ranking