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    METHOD FOR CONTROLLING THE SODIUM CARBONATE CONCENTRATION OF GREEN LIQUOR IN THE DISSOLVING TANK
    1.
    发明专利
    METHOD FOR CONTROLLING THE SODIUM CARBONATE CONCENTRATION OF GREEN LIQUOR IN THE DISSOLVING TANK 未知

    公开(公告)号：AU1867192A

    公开(公告)日：1993-01-28

    申请号：AU1867192

    申请日：1992-06-29

    Applicant: THE FOXBORO COMPANY

    Inventor： WOLF MUSOW

    IPC: D21C11/00

    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.

    DUAL-COLUMN, DUAL-DETECTOR GAS DETECTOR AND ANALYZER
    2.
    发明专利
    DUAL-COLUMN, DUAL-DETECTOR GAS DETECTOR AND ANALYZER 未知

    公开(公告)号：AU632489B2

    公开(公告)日：1993-01-07

    申请号：AU3986789

    申请日：1989-07-20

    Applicant: THE FOXBORO COMPANY

    Inventor： RAYMOND ANNINO ,  MICHAEL L. BARTLETT ,  EDWIN L. KARAS ,  DALE E. LUECK ,  JOHN L. MIDDLETON ,  RICHARD VILLALOBOS

    IPC: G01N30/46 ,  G01N30/78

    Abstract: A dual-column, dual-detector gas detector and analyzer employs both a photo-ionization detector and a flame-ionization detector. In a survey mode, samples of ambient air are driven through both detectors, and the outputs of both detectors are used to determine the presence of one or more gasses. In analysis mode, fixed-volume samples of ambient air are driven through two elution columns having different properties. The output of each elution column is fed to one of the detectors. The arrival times of gas peaks at the two detectors are employed to develop two lists of candidate gasses. The lists are cross-checked for the presence of each candidate on both lists. Candidates identified from their presence on both lists are identified. A further check attempts to identify candidates which are identifiable from their presence on one of the lists, and not on the other. Components identified in this way are added to the final list. Unidentified components are discarded, although their presence is noted and reported as unknown. Portability is retained by eliminating isothermal ovens and by reducing the quantity of hydrogen required. A simplified way of characterizing temperature corrections of elution columns is disclosed.

    THREE-TOROID ELECTRODELESS CONDUCTIVITY CELL
    3.
    发明专利
    THREE-TOROID ELECTRODELESS CONDUCTIVITY CELL 未知

    公开(公告)号：AU640321B2

    公开(公告)日：1993-08-19

    申请号：AU6723990

    申请日：1990-10-02

    Applicant: THE FOXBORO COMPANY

    Inventor： PHILIP C REESE

    IPC: G01N27/02 ,  G01R27/22

    Abstract: An electrodeless conductivity measuring cell having three toroids. In one arrangement, the three toroids are stacked together wherein the center toroid is used for sensing and the two outer toroids are the drive toroids. Alternatively, the center toroid may be used as the drive coil and the outer toroids used as sense coils. Washer-shaped, grounded discs are placed between the outer toroids and the center toroid to provide for improved noise rejection. A method of validating the fluid conductivity measurement of such a measuring cell. The fluid conductivity is measured with a three-cell configuration, and then it is measured with a two-cell configuration. If the conductivity is observed to be the same, the cells are likely functioning normally. If fluid leaks into the cell cavity, the measurement of conductivity will change.

    IDIOMATIC CONTROL LANGUAGE IMPLEMENTATION
    5.
    发明申请
    IDIOMATIC CONTROL LANGUAGE IMPLEMENTATION 审中-公开
    国际控制语言实施

    公开(公告)号：WO1997040425A2

    公开(公告)日：1997-10-30

    申请号：PCT/US1997006978

    申请日：1997-04-25

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  BRISTOL, Edgar, H.

    IPC: G05B00/00

    CPC classification number: G05B19/0426 ,  G05B15/02 ,  G05B2219/23272

    Abstract: A computer controller and method of operating the same for controlling industrial process control equipment which uses a language structure and data specifically adapted for use in constructing computer programs for controlling chemical and physical processing. A translator converts to compilable code programs written as statements expressing control intentions or results. Provisions are made for implementing discrete variables using natural language statements, for assigning values to the discrete variables and for performing conditional execution statements using the discrete variables in natural language format.

    Abstract translation: 一种计算机控制器及其操作方法，用于控制工业过程控制设备，其使用特别适用于构建用于控制化学和物理处理的计算机程序的语言结构和数据。 翻译器转换为可编写的代码程序，写成表达控制意图或结果的语句。 使用自然语言语句实现离散变量的规定，为离散变量分配值和使用自然语言格式的离散变量执行条件执行语句。

    PRESSURE SEALED HOUSING APPARATUS AND METHODS
    7.
    发明申请
    PRESSURE SEALED HOUSING APPARATUS AND METHODS 审中-公开
    压力密封外壳设备和方法

    公开(公告)号：WO1996037764A1

    公开(公告)日：1996-11-28

    申请号：PCT/US1996007279

    申请日：1996-05-20

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  POWELL, Roger, E. II ,  KOROWITZ, Simon ,  ANGELOSANTO, John, P. ,  KARAS, Edwin, L.

    IPC: G01L19/14

    CPC classification number: G01L19/14

    Abstract: A selectively pressured housing apparatus comprising a body, a wall member, an aperture, and a mounting seat. The body has a chamber therein extending along a first axis, is open at a first axial end and a second axial end, and has a port extending along a second axis transverse to the first axis. The port communicates with the chamber. The wall member is inside of the body and extends transverse to the first axis and parallel to the second axis and divides the chamber into first and second compartments, axially spaced along the first axis. The port communicating with the chamber is in the second compartment. The aperture extends through the wall member and connects the first and second compartments. The mounting seat is on the wall member and extends circumferentially about the aperture for removably and replaceably seating an element with a selected pressure seal to the wall member. According to one preferred embodiment, the first and second compartments are employed for housing process electronics associated with a differential pressure transmitter.

    Abstract translation: 一种选择性加压的壳体装置，包括主体，壁构件，孔和安装座。 主体具有沿着第一轴线延伸的室，在第一轴向端部和第二轴向端部处开口，并且具有沿着横向于第一轴线的第二轴线延伸的端口。 港口与房间通讯。 壁构件在主体的内部并且横向于第一轴线并且平行于第二轴线延伸并且将腔室划分成沿着第一轴线轴向间隔开的第一和第二隔室。 与室连通的端口在第二隔间。 孔径延伸穿过壁构件并连接第一和第二隔室。 安装座位于壁构件上并围绕孔周向延伸，用于可移除地并且可替换地将具有选择的压力密封件的元件安置在壁构件上。 根据一个优选实施例，第一和第二隔室用于容纳与差压变送器相关的过程电子装置。

    EXCITATION OF POLYSILICON-BASED PRESSURE SENSORS
    8.
    发明申请
    EXCITATION OF POLYSILICON-BASED PRESSURE SENSORS 审中-公开
    基于多晶硅的压力传感器的激发

    公开(公告)号：WO1996019719A1

    公开(公告)日：1996-06-27

    申请号：PCT/US1995016200

    申请日：1995-12-15

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  MCHALE, Edward, J. ,  FUNG, Clifford, D.

    IPC: G01L09/06

    CPC classification number: G01L9/06 ,  G01L9/0055

    Abstract: The object of this invention is to eliminate long-term transient behavior upon electrical excitation of polycrystalline silicon and provide electrical excitation with a minimal stabilization period and utilizing micro-power consumption. This invention comprises an electronic excitation circuit for a polycrystalline silicon sensor that detects the pressure of a process flow. The sensor consists of polycrystalline silicon piezoresistors (22) deposited onto a polycrystalline silicon sensing diaphragm (14) having a dielectric layer (18) interposed in between. Electrical excitation of the piezoresistors is accomplished by an alternating electrical waveform having a constant amplitude of less than 10 volts and at a frequency of less than 100k Hz. The waveform is applied to a first input terminal (40a) of a Wheatstone bridge with an opposite polarity to a second input terminal (40b) of the bridge. The resultant voltage difference between the output terminals is used to detect an imbalance in the electrical resistors induced by applied pressure. The voltage level and frequency range chosen is such that the circuit utilized approximately 1 mW of power.

    Abstract translation: 本发明的目的是消除多晶硅电激发时的长期瞬态特性，并以最小的稳定周期提供电激励并利用微功耗。 本发明包括用于多晶硅传感器的电子激励电路，其检测工艺流程的压力。 传感器由多晶硅压敏电阻器（22）组成，沉积在多晶硅感测隔膜（14）上，该多晶硅感测隔膜（14）具有介于其间的电介质层（18）。 压敏电阻器的电激励是通过具有小于10伏的恒定振幅并且频率小于100kHz的交流电波形实现的。 波形被施加到惠斯通电桥的第一输入端子（40a），其具有与桥的第二输入端子（40b）相反的极性。 输出端子之间的合成电压差用于检测施加压力引起的电阻器的不平衡。 选择的电压电平和频率范围使得电路使用大约1mW的功率。

    THREE-TOROID ELECTRODELESS CONDUCTIVITY CELL
    9.
    发明申请
    THREE-TOROID ELECTRODELESS CONDUCTIVITY CELL 审中-公开
    三极电极电导率电池

    公开(公告)号：WO1991006000A1

    公开(公告)日：1991-05-02

    申请号：PCT/US1990005504

    申请日：1990-10-02

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  REESE, Philip, C.

    IPC: G01N27/02

    CPC classification number: G01R27/22 ,  G01N27/023

    Abstract: An electrodeless conductivity measuring cell having three toroids is shown and described. In one arrangement, the three toroids are stacked together wherein the center toroid is used for sensing and the two outer toroids are the drive toroids. Alternatively, the center toroid may be used as the drive coil and the outer toroids used as sense coils. Washer-shaped, grounded discs are placed between the outer toroids and the center toroid to provide for improved noise rejection. A method of validating the fluid conductivity measurement of such a measuring cell is also shown. The fluid conductivity is measured with a three-cell configuration, and then it is measured with a two-cell configuration. If the conductivity is observed to be the same, the cells are likely functioning normally. If fluid leaks into the cell cavity, the measurement of conductivity will change.

    COMPUTER LANGUAGE STRUCTURE, EMPLOYING SYMBOLS TO CONTROL EXECUTION OF PROGRAM STATEMENTS, FOR PROCESS CONTROL APPLICATION, AND TRANSLATOR THEREFOR
    10.
    发明申请
    COMPUTER LANGUAGE STRUCTURE, EMPLOYING SYMBOLS TO CONTROL EXECUTION OF PROGRAM STATEMENTS, FOR PROCESS CONTROL APPLICATION, AND TRANSLATOR THEREFOR 审中-公开
    计算机语言结构，使用程序语句执行符号，过程控制应用程序及其翻译器

    公开(公告)号：WO1989008889A1

    公开(公告)日：1989-09-21

    申请号：PCT/US1988000689

    申请日：1988-03-07

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  BRISTOL, Edgar, H.

    IPC: G06F15/38

    CPC classification number: G06F8/31 ,  G05B2219/23291

    Abstract: A language structure and translator specifically adapted for use in constructing computer programs for controlling chemical and physical processing. The translator converts to compilable code programs written as statements expressing control intentions or results. Each textual function (1, 2, and 3) and statement is expressed as a data structure which expresses the function, as configured, and the state and values most recently calculated for the relevant variables. Provision is made for treating the program structure (i.e., control connections, program order and components, etc.) as a part of the dynamic state of the application. Graphical symbols, or icons (52, 54, 56 and 58) are employed to draw the eye to critical features in the control program and to lead the eye through critical interrelationships among the several commands of a complicated control system. At the same time, the translator treats the keystrokes generating these icons as statements (i.e., commands) which define the relationships among other associated program statements (which are usually textual commands), to control the order in which the operations represented by those statements are executed.

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