公开(公告)号：EP0572244A3

公开(公告)日：1996-12-11

申请号：EP93304098.2

申请日：1993-05-26

Applicant: THE FOXBORO COMPANY

Inventor： Shinskey, Francis G.

IPC: G05B19/00

CPC classification number: G05B13/025

Abstract: An improved system for tuning process control equipment applies a load change of amplitude δq to the process to effect a change in it and, therefore, in the controlled variable. Monitoring the response of the controller to that change, the system identifies an observed overshoot, OVS o , in the manipulated variable signal. From that overshoot signal and a predetermined theoretical overshoot signal, OVS τ , the system generates an optimum gain, K opt , as a function of the mathematical expression K opt = K * (1 + OVS τ ) / (1 + OVS o )
where,
   K is the current gain of the automatic control subsection,
   OVS o is the observed overshoot, and
   OVS τ is the predetermined overshoot.

公开(公告)号：EP0329700B1

公开(公告)日：1996-06-12

申请号：EP87907556.2

申请日：1987-10-21

Applicant: THE FOXBORO COMPANY

Inventor： MATTAR, Wade, M. ,  THOMPSON, Duane, T. ,  DeCARLO, Joseph, P. ,  HUSSAIN, Yousif ,  CHITTY, Gordon, W.

IPC: G01F1/84

CPC classification number: G01F1/8413 ,  G01F1/8431 ,  G01F1/8436 ,  G01F1/8486

Abstract: A manifold block (16) defines a coaxial inlet and outlet of the flowmeter and supports a continuous conduit loop (18) substantially encircling the block and having its inlet and outlet ends closely spaced. Preferably, the loop includes a straight section (26) perpendicular to the inlet and outlet ends. Dual drive units (70) are preferably provided for oscillating the straight section about its perpendicular bisector and position detectors (80) employed near the opposite ends of the straight section, preferably at the same location as the drive units, provide readouts which are combined algebraically and synchronously demodulated to yield an output indicative of mass flow. A second loop (20) identical and parallel to the first, is supported by the block. Interchangeable manifolds are disclosed for series and parallel flow through the two loops, respectively. The plane of the loop or loops can be oriented perpendicular or parallel to the process line.

公开(公告)号：EP0504319B1

公开(公告)日：1996-02-28

申请号：EP91902580.9

申请日：1990-12-19

Applicant: THE FOXBORO COMPANY

Inventor： GARNER, Ronald, N. ,  VERNON, Robert, D.

IPC: H05K7/14

CPC classification number: H05K7/1461

Abstract: An integrated circuit board assembly includes two integrated circuit boards. The integrated circuit boards have an electronic circuitry configured on the interior face and a dielectric sealant on the other face. The integrated circuit boards are secured to a frame in such a manner that the interior faces of the integrated circuit boards face inward toward each other. The securing of the frame to the integrated circuit boards is such that it forms a sealed enclosure protecting the electronic circuitry configured therein from the process environment. The exterior faces, however, are exposed to the process environment and are helpful in dissipating heat to the exterior environment.

公开(公告)号：EP0524743B1

公开(公告)日：1995-12-13

申请号：EP92306237.6

申请日：1992-07-07

Applicant: THE FOXBORO COMPANY

Inventor： Musow, Wolf

IPC: D21C11/00

CPC classification number: D21C11/0064 ,  Y02P40/44

公开(公告)号：EP0469771B1

公开(公告)日：1995-09-20

申请号：EP91306677.5

申请日：1991-07-23

Applicant: THE FOXBORO COMPANY

Inventor： Badavas, Paul C.

IPC: G05B21/02

CPC classification number: G05B21/02

公开(公告)号：EP0646234A1

公开(公告)日：1995-04-05

申请号：EP93910681.0

申请日：1993-04-21

Applicant: THE FOXBORO COMPANY

Inventor： HENRY, Manus, P. ,  MATTAR, Wade ,  CLARKE, David W. ,  YANG, Janice

IPC: G01D3 ,  G01D18 ,  G01F1 ,  G01K15

CPC classification number: G01F15/024 ,  G01F1/8436 ,  G01F1/8477 ,  G01K15/00

Abstract: A sensor provides a measurement and information about the validity of the measurement. The sensor includes a transducer for generating a data signal related to the value of a variable and a transmitter for receiving the data signal and generating output signals. The transmitter generates a first output signal related to the value of the variable. The transmitter also generates a second output signal based on a dynamic uncertainty analysis of the first output signal.

公开(公告)号：EP0626627A1

公开(公告)日：1994-11-30

申请号：EP94303749.9

申请日：1994-05-25

Applicant: THE FOXBORO COMPANY

Inventor： Shinskey, Francis G.

IPC: G05B13/02

CPC classification number: G05B13/024 ,  G05B13/0265

Abstract: A self-tuning deadtime controller for adaptively adjusting one or several controller parameters during process control activities. The controller tunes, for example, the controller deadtime and the proportional band to optimize deadtime controller performance. The high performance of a deadtime controller is maintained even though the controller is incorrectly pretuned or if the process is subject to loads which change its characteristics.

Abstract translation: 自调整死区时间控制器，用于在过程控制活动期间自适应调整一个或多个控制器参数。 控制器调谐例如控制器死区时间和比例带，以优化死区时间控制器的性能。 即使控制器不正确地预先调节，或者过程受到改变其特性的负载的影响，仍保持死区控制器的高性能。

公开(公告)号：EP0569899A1

公开(公告)日：1993-11-18

申请号：EP93107531.1

申请日：1993-05-09

Applicant: THE FOXBORO COMPANY

Inventor： Fung, Clifford D. ,  Chau, Kevin H.-L.

IPC: G01L9/12

CPC classification number: G01L9/0073 ,  Y10S438/928 ,  Y10S438/977 ,  Y10T29/43

Abstract: A capacitive differential pressure sensing device with pressure overrange protection and a method of making the same are described. The device employs a doped polysilicon diaphragm (18) overlying a cavity (16) in a doped single crystal silicon wafer (10) having a port (20) extending into the cavity (16) from the opposite side. The cavity floor (22) serves as an overrange protector.

Abstract translation: 一种电容压力差与压力超过范围保护和制备其的方法感测装置进行说明。 该器件采用一个掺杂的多晶硅薄膜（18）覆盖在具有端口（20）延伸到从相对侧上的腔体（16）掺杂的单晶硅晶片（10）的空腔（16）。 腔底板（22）成为在过范围保护。

公开(公告)号：EP0553725A3

公开(公告)日：1993-10-20

申请号：EP93100947.6

申请日：1993-01-22

Applicant: THE FOXBORO COMPANY

Inventor： Koen, Edward F. ,  Vernon, Robert D.

IPC: G01L9/06 ,  G01L9/00

CPC classification number: G01L19/0084 ,  G01L9/0042 ,  G01L19/147 ,  G01L27/007 ,  H01L2224/48091 ,  H01L2224/73265 ,  Y10T29/49103 ,  H01L2924/00014

Abstract: A pressure sensor sub-assembly (18) has a solid-state sensing element (22) mounted on a laminated ceramic substrate (20) and has the electrical signal contacts (22a) on the sensing element electrically connected to connector pins (24) on the substrate. A manufacturing process can fabricate a batch of sub-assemblies on a substrate structure that is sub-divided to form the separate sub-assemblies. The sensor sub-assemblies can be tested, and graded, before or after the sub-division step, and then each mounted in a housing.

公开(公告)号：EP0524743A1

公开(公告)日：1993-01-27

申请号：EP92306237.6

申请日：1992-07-07

Applicant: THE FOXBORO COMPANY

Inventor： Musow, Wolf

IPC: D21C11/00

CPC classification number: D21C11/0064 ,  Y02P40/44

Abstract: A method for regulating the sodium carbonate concentration of a green liquor (17) in the dissolving tank (14) of the Kraft recovery process by measuring the conductivity of the green liquor from the dissolving tank, measuring the conductivity and flow rate of a weak wash solution (16) being added to the green liquor in the dissolving tank, using these measurements to determine the sodium carbonate concentration of the green liquor in the dissolving tank, and adjusting the volume of the weak wash solution (16) being added to the dissolving tank in response to changes in the concentration of sodium carbonate in the green liquor so as to maintain the concentration of sodium carbonate in the green liquor at a predetermined, preferably constant, level.

Abstract translation: 一种通过测量来自溶解罐的绿液的电导率，测量弱洗涤液的电导率和流速来调节牛皮纸回收方法的溶解槽（14）中的绿液（17）的碳酸钠浓度的方法 将溶液（16）加入到溶解槽中的绿液中，使用这些测定来确定溶解槽中的绿液的碳酸钠浓度，并调节加入到溶解槽中的弱洗涤溶液（16）的体积 响应于绿液中碳酸钠浓度的变化，以使绿液中的碳酸钠浓度保持在预定的，优选恒定的水平。