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    ELECTRICAL-CHARGE SENSING FLOWMETER
    31.
    发明申请
    ELECTRICAL-CHARGE SENSING FLOWMETER 审中-公开
    电荷感应流量计

    公开(公告)号：WO1985001795A1

    公开(公告)日：1985-04-25

    申请号：PCT/US1984001543

    申请日：1984-09-25

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  McHALE, Edward, J. ,  MATTAR, Wade, M.

    IPC: G01F01/64

    CPC classification number: G01F1/58 ,  G01F1/3245 ,  G01F1/64

    Abstract: An element interacting with a stream of a fluid moving through a pipe generates periodic sub-flows at a rate that varies in accordance with changes in the velocity of the moving fluid. The generation of sub-flows also modulates the electrical charges contained in and moving with the fluid thus permitting a detector which is responsive to the energy being radiated by the modulated charges to produce a sensor signal having a frequency corresponding to the generating rate of the periodically produced sub-flows. In one preferred embodiment, the element is a vortex-shedding body and the sub-flows are vortices being shed therefrom. Electrical circuitry which receives the sensor signal converts it into a flow signal representative of the velocity of the moving fluid.

    FIBER OPTIC DISPLACEMENT SENSOR WITH BUILT-IN REFERENCE
    32.
    发明申请
    FIBER OPTIC DISPLACEMENT SENSOR WITH BUILT-IN REFERENCE 审中-公开
    具有内置参考的光纤位移传感器

    公开(公告)号：WO1984001824A1

    公开(公告)日：1984-05-10

    申请号：PCT/US1983000844

    申请日：1983-06-01

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  GILBY, Anthony, C.

    IPC: G01D05/26

    CPC classification number: G01D5/34723 ,  G01D5/268

    Abstract: An apparatus usable in process control applications for detecting the position of a movable element in a sensor wherein first and second beams of light, each having different wavelengths and each preferably being alternately generated with respect to one another by a light source, are transmitted to a filter by means of an optical fiber cable connected between the light source and filter. The filter and the movable element cooperate for modulating the intensity of the first beam in accordance with the position of the movable element and thereby transforming that first beam into a measurement beam which appears at an output stage of the filter. The filter also transmits the second beam therethrough unaffected by the movable element and produces a reference beam appearing at the output stage. A first optical detector is coupled to the light source, the respective intensities of the two light beams being transmitted towards the filter. A second optical detector connected to the output stage of the filter measures the respective intensities of the measurement and reference beams. The four intensity measurements made by the two optical detectors are combined in a prescribed manner for producing a position signal which is representative of the position of the movable element and which is substantially independent of the transmitting factors for the optical paths transmitting the first, second, measurement and reference beams as well as substantially independent of output variations in the light source or responsivity changes in the detectors.

    PROCESS CONTROL SYSTEM WITH IMPROVED FAULT ISOLATION
    33.
    发明申请
    PROCESS CONTROL SYSTEM WITH IMPROVED FAULT ISOLATION 审中-公开
    具有改进故障隔离的过程控制系统

    公开(公告)号：WO1984000829A1

    公开(公告)日：1984-03-01

    申请号：PCT/US1983000586

    申请日：1983-04-20

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  HALLEE, Donald, O. ,  LAKE, Harold ,  JOHANSSON, Kenneth, L. ,  GRAVES, Thomas, B.

    IPC: G05B23/02

    CPC classification number: G05B9/03 ,  G05B23/0275 ,  H05K7/1438

    Abstract: A process control system includes redundant digital controllers and a plurality of input/output (I/O) modules for interfacing with remote field sensors and actuators. Bi-directional communication between controllers and I/O modules is achieved by a parallel wired, process I/O bus. Failures within the system, including the bus structure itself, that continually keep the bus active (i.e., in a low state) are isolated by a combination of software diagnostic routines for performing bus checkout and a unique quick disconnect feature that readily isolates the fault condition first between the I/O module nest area and the controllers, then, if necessary, to individual I/O modules. During fault isolation procedures, individual I/O modules may be disconnected from the bus while the values of field signals are simultaneously maintained to provide minimum process upset.

    IMPULSE LINE BLOCKAGE DETECTOR SYSTEMS AND METHODS
    34.
    发明申请
    IMPULSE LINE BLOCKAGE DETECTOR SYSTEMS AND METHODS 审中-公开
    脉冲线阻塞检测系统和方法

    公开(公告)号：WO1997048974A1

    公开(公告)日：1997-12-24

    申请号：PCT/US1997010208

    申请日：1997-06-19

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  LOWE, Justin, Peter ,  CLARKE, David, W.

    IPC: G01L09/00

    CPC classification number: G01L27/007 ,  G01F1/34 ,  G01L15/00 ,  Y10T137/8326

    Abstract: A differential pressure sensor is attached to a process via a high and a low pressure impulse line. An absolute pressure sensor is also attached to each impulse line. To determine if an impulse line is blocked, a noise signal is acquired from the corresponding absolute pressure sensor. A variance of the noise signal is determined and compared to a threshold. If the variance is less than the threshold, an impulse line blockage is indicated.

    Abstract translation: 差压传感器通过高压和低压脉冲线连接到过程。 绝对压力传感器也连接到每条脉冲线。 为了确定脉冲线是否被阻塞，从相应的绝对压力传感器获取噪声信号。 确定噪声信号的方差并将其与阈值进行比较。 如果方差小于阈值，则表示脉冲线阻塞。

    CONTROLLER AND METHOD FOR CONTROLLING ELECTRICAL SUPERGRID TRANSFORMER VOLTAGE
    36.
    发明申请
    CONTROLLER AND METHOD FOR CONTROLLING ELECTRICAL SUPERGRID TRANSFORMER VOLTAGE 审中-公开
    控制器和控制电子超级变压器电压的方法

    公开(公告)号：WO1996023250A1

    公开(公告)日：1996-08-01

    申请号：PCT/GB1996000162

    申请日：1996-01-25

    Applicant: THE FOXBORO COMPANY ,  de SA, Douglas ,  MAALOUF, Salim, Ibrahim

    Inventor： THE FOXBORO COMPANY

    IPC: G05F01/153

    CPC classification number: G05F1/153

    Abstract: A controller for controlling the tap positions of a group of on-load tap changing transformer (2, 2') has a respective tap position controller (14, 34, 14', 34') associated with each transformer (2, 2') each of which is arranged to be able to control its associated transformer in response to a measurement value dependent on the voltage at the transformer (2, 2'). A group sequence controller (16) is able to selectively disable the tap position controllers (14, 34, 14', 34') and output its own tap changing signals to adjust the spread of tap positions of the transformers as desired. Methods of use of such a controller are also disclosed. The invention finds primary application with the control of the high voltage supergrid transformer sections of National Power distribution systems.

    Abstract translation: 用于控制一组有载分接变换变压器（2,2'）的抽头位置的控制器具有与每个变压器（2,2'）相关联的各个抽头位置控制器（14,34,14'，34'）， 其中的每一个被布置成能够响应于取决于变压器（2,2'）处的电压的测量值来控制其相关联的变压器。 组序列控制器（16）能够选择性地禁用抽头位置控制器（14,34,14'，34'）并输出其自己的抽头改变信号，以根据需要调整变压器的抽头位置的扩展。 还公开了这种控制器的使用方法。 本发明主要用于控制国家配电系统的高压超级电网变压器部分。

    DIFFERENTIAL PRESSURE TRANSMITTER
    37.
    发明申请
    DIFFERENTIAL PRESSURE TRANSMITTER 审中-公开
    差压变送器

    公开(公告)号：WO1996006338A2

    公开(公告)日：1996-02-29

    申请号：PCT/US1995010610

    申请日：1995-08-18

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  KARAS, Edwin, L.

    IPC: G01L09/00

    CPC classification number: G01L19/147 ,  G01L13/026 ,  G01L19/0046 ,  G01L19/0618 ,  G01L19/0663 ,  G01L19/0681

    Abstract: A pressure transmitter apparatus having a unitary body portion, separate diaphragms and flange elements and disposed within the body, a first and second normally vertical pressure passages. The first and second pressure passageways communicate respectively between first and second pressure openings extending normally horizontally through the body portion, and a transducer mounting element. The mounting element, coupled to the body portion and located above the pressure passageways, mounts a transducer that generates a differential pressure signal. One or a pair of diaphragm elements are configured to form first and second process diaphragms, closing first and second pressure openings. The flange element overlies the diaphragm element and is removably and replaceably secured to the body portion. The pressure transmitter also includes a flame retardation element that is disposed within at least one of the pressure passageways, and an overrange protection element, integrally arranged with the unitary body portion, that protects the transducer from overrange pressure fluctuations. Special flange plane geometries optimize size and sensitivity of isolation diaphragms.

    Abstract translation: 一种具有整体主体部分，分离的隔膜和凸缘元件并设置在主体内的压力变送器设备，第一和第二正常垂直的压力通道。 第一和第二压力通道分别在通过主体部分正常水平延伸的第一和第二压力开口之间连通，以及换能器安装元件。 耦合到主体部分并且位于压力通道上方的安装元件安装产生差压信号的换能器。 一个或一对隔膜元件构造成形成第一和第二过程隔膜，关闭第一和第二压力开口。 凸缘元件覆盖在隔膜元件上，并可拆卸地且可更换地固定在主体部分上。 压力变送器还包括设置在压力通道中的至少一个压力通道中的阻燃元件和与整体主体部分整体设置的超范围保护元件，其保护换能器免受过大的压力波动的影响。 特殊的法兰面几何尺寸优化隔离膜的尺寸和灵敏度。

    AN IMPROVED SELF-TUNING CONTROLLER
    38.
    发明申请
    AN IMPROVED SELF-TUNING CONTROLLER 审中-公开
    改进的自调节控制器

    公开(公告)号：WO1993009481A1

    公开(公告)日：1993-05-13

    申请号：PCT/US1991007957

    申请日：1991-10-28

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  HANSEN, Peter, D. ,  BRISTOL, Edgar, H.

    IPC: G05B13/02

    CPC classification number: G05B13/024

    Abstract: An apparatus and method for automatically adjusting the control parameters of a self-tuning controller used to regulate a process having a measured process variable signal. Using the measured process variable signal, an error signal representing a closed-loop response of the process to an upset condition is generated. Local extrema of the error signal is measured and three successive amplitude values are selected to produce measured decay and overshoot characteristics of the error signal. The three successive amplitude values are selected such that the measured decay characteristic is greater than the overshoot characteristic. Based on the measured decay and overshoot characteristics at least one of the control parameters of the controller is automatically adjusted to improve the difference between one of the measured characteristics and a target characteristic.

    Abstract translation: 一种用于自动调节用于调节具有测量的过程变量信号的过程的自调节控制器的控制参数的装置和方法。 使用所测量的过程变量信号，产生表示过程到镦粗状态的闭环响应的误差信号。 测量误差信号的局部极值，并选择三个连续的振幅值，以产生误差信号的测量衰减和过冲特性。 选择三个连续的幅度值，使得测量的衰减特性大于过冲特性。 基于测量的衰减和过冲特性，自动调整控制器的至少一个控制参数，以改善测量特性之一和目标特性之间的差异。

    OPTICAL PROBE FOR FLUID LIGHT TRANSMISSION PROPERTIES
    40.
    发明申请
    OPTICAL PROBE FOR FLUID LIGHT TRANSMISSION PROPERTIES 审中-公开
    流体光传输特性的光学探头

    公开(公告)号：WO1990012309A1

    公开(公告)日：1990-10-18

    申请号：PCT/US1990001395

    申请日：1990-03-21

    Applicant: THE FOXBORO COMPANY

    Inventor： THE FOXBORO COMPANY ,  JEANNOTTE, Anthony, C. ,  GILBY, Anthony, C.

    IPC: G01N21/00

    CPC classification number: G01N21/8507 ,  G01N2021/054 ,  G01N2021/1744 ,  G01N2201/08

    Abstract: Radiant energy is transmitted to a probe element (10) including an interior conical reflecting surface (17) and a fluid sample chamber (18). Portions of the light which have been transmitted, partially attenuated, or scattered by a fluid sample (73) in the sample chamber (18) are directed by at least a portion of the interior conical reflecting surface (17) to means for collecting the transmitted, partially attenuated, or scattered light. A stilling valve (12) incorporated into the probe element (10) enables elimination of entrained gas bubbles from the chamber (18).

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