公开(公告)号：WO1995020141A1

公开(公告)日：1995-07-27

申请号：PCT/US1995000835

申请日：1995-01-17

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  WARRIOR, Jogesh ,  BRIGHAM, Scott, E. ,  LENZ, Gary, A.

IPC: G01D18/00

CPC classification number: G01D3/0365 ,  G01D3/022 ,  G01D18/00 ,  Y10S706/90 ,  Y10S706/906

Abstract: A circuit (58) for compensating variables in a measurement transmitter (2). Within the transmitter, a sensor (54) senses a primary process variable such as differential pressure and a converter (56) digitizes the sensed process variable. The sensor (54) senses pressures within a span of pressures values. A memory (68) inside the transmitter stores at least two membership functions. The memory (68) also stores a set of compensation formulas, each formula corresponding to a membership function. A selection circuit (64) in the transmitter (2) selects those membership functions which have a non-zero value at the digitized PV, and a correction circuit (66) provides at least one correction value calculated from a compensation formula corresponding to a selected membership function. A weighting circuit (70) multiplies each correction value by its corresponding selected membership function, and combines the multiplicands to provide a compensated PV. The compensated PV is coupled to a control circuit (6) connecting the transmitter (2) to a control system (4).

Abstract translation: 一种用于补偿测量发射器（2）中的变量的电路（58）。 在发射器内，传感器（54）感测主要过程变量（例如差压）和转换器（56）数字化感测到的过程变量。 传感器（54）感测压力范围内的压力值。 发射机内的存储器（68）存储至少两个隶属函数。 存储器（68）还存储一组补偿公式，每个公式对应于隶属函数。 发射机（2）中的选择电路（64）选择在数字化的PV处具有非零值的那些隶属函数，并且校正电路（66）提供从与所选择的对应的补偿公式计算的至少一个校正值 隶属函数。 加权电路（70）将每个校正值乘以其对应的选择的隶属函数，并组合被乘数以提供经补偿的PV。 补偿PV耦合到将发射器（2）连接到控制系统（4）的控制电路（6）。

公开(公告)号：WO1998006016A1

公开(公告)日：1998-02-12

申请号：PCT/US1997012178

申请日：1997-07-11

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  ZOU, Hehong ,  BRIGHAM, Scott, E.

IPC: G05B23/02

CPC classification number: G05B13/042

Abstract: A process control system (100) controls a non-self regulating process through a control output signal (u(t)) based on a set point YSET and a measured process variable (y(t)). The process control system includes a control circuit (102, 104, 106, 108) having a set point input, a process variable input and a control output. The control circuit generates the control output signal (u(t)) on the control output as a function of the set point YSET received on the set point input and the measured process variable (y(t)) received on the process variable input. An auto-tuning circuit (106) excites the process, estimates a process model based on an intersection between rising and falling asymptotes of the measured process variable (y(t)), and then tunes the control function to the process (110) based on the process model. The auto-tuning circuit obtains robust results, but is computationally simple such that the circuit can be implemented with hardware or software in low-power and low-memory applications, such as in field-mounted controllers.

Abstract translation: 过程控制系统（100）基于设定点YSET和测量过程变量（y（t））通过控制输出信号（u（t））来控制非自调节过程。 过程控制系统包括具有设定点输入，过程变量输入和控制输出的控制电路（102,104,106,108）。 控制电路根据在设定点输入端接收的设定值YSET和在过程变量输入端接收到的测量过程变量（y（t）），产生控制输出上的控制输出信号（u（t））。 自动调谐电路（106）激发该过程，基于测量的过程变量（y（t））的上升和下降渐近线之间的交点估计过程模型，然后基于过程（110）调整控制功能 在过程模型上。 自动调谐电路获得了强大的结果，但是计算上简单，因此电路可以在低功耗和低内存应用中的硬件或软件实现，如现场安装的控制器。

公开(公告)号：EP0853775B1

公开(公告)日：2003-03-12

申请号：EP97933422.4

申请日：1997-07-11

Applicant: ROSEMOUNT INC.

Inventor： ZOU, Hehong ,  BRIGHAM, Scott, E.

IPC: G05B23/02 ,  G05B13/02

CPC classification number: G05B13/042

公开(公告)号：EP0853775A1

公开(公告)日：1998-07-22

申请号：EP97933422.0

申请日：1997-07-11

Applicant: ROSEMOUNT INC.

Inventor： ZOU, Hehong ,  BRIGHAM, Scott, E.

IPC: G05B13

CPC classification number: G05B13/042

Abstract: A process control system (100) controls a non-self regulating process through a control output signal (u(t)) based on a set point YSET and a measured process variable (y(t)). The process control system includes a control circuit (102, 104, 106, 108) having a set point input, a process variable input and a control output. The control circuit generates the control output signal (u(t)) on the control output as a function of the set point YSET received on the set point input and the measured process variable (y(t)) received on the process variable input. An auto-tuning circuit (106) excites the process, estimates a process model based on an intersection between rising and falling asymptotes of the measured process variable (y(t)), and then tunes the control function to the process (110) based on the process model. The auto-tuning circuit obtains robust results, but is computationally simple such that the circuit can be implemented with hardware or software in low-power and low-memory applications, such as in field-mounted controllers.

公开(公告)号：EP0741858B1

公开(公告)日：1998-08-12

申请号：EP95908616.6

申请日：1995-01-17

Applicant: ROSEMOUNT INC.

Inventor： WARRIOR, Jogesh ,  BRIGHAM, Scott, E. ,  LENZ, Gary, A.

IPC: G01D18/00 ,  G01D3/02 ,  G01D3/028

CPC classification number: G01D3/0365 ,  G01D3/022 ,  G01D18/00 ,  Y10S706/90 ,  Y10S706/906

公开(公告)号：EP0741858A1

公开(公告)日：1996-11-13

申请号：EP95908616.0

申请日：1995-01-17

Applicant: ROSEMOUNT INC.

Inventor： WARRIOR, Jogesh ,  BRIGHAM, Scott, E. ,  LENZ, Gary, A.

IPC: G01D3 ,  G01D18

CPC classification number: G01D3/0365 ,  G01D3/022 ,  G01D18/00 ,  Y10S706/90 ,  Y10S706/906

Abstract: A circuit (58) for compensating variables in a measurement transmitter (2). Within the transmitter, a sensor (54) senses a primary process variable such as differential pressure and a converter (56) digitizes the sensed process variable. The sensor (54) senses pressures within a span of pressures values. A memory (68) inside the transmitter stores at least two membership functions. The memory (68) also stores a set of compensation formulas, each formula corresponding to a membership function. A selection circuit (64) in the transmitter (2) selects those membership functions which have a non-zero value at the digitized PV, and a correction circuit (66) provides at least one correction value calculated from a compensation formula corresponding to a selected membership function. A weighting circuit (70) multiplies each correction value by its corresponding selected membership function, and combines the multiplicands to provide a compensated PV. The compensated PV is coupled to a control circuit (6) connecting the transmitter (2) to a control system (4).