公开(公告)号：US5771114A

公开(公告)日：1998-06-23

申请号：US536397

申请日：1995-09-29

Applicant: Anders G. Andersson ,  Michael J. Smith

Inventor： Anders G. Andersson ,  Michael J. Smith

IPC: H04B10/00 ,  H04B10/08

CPC classification number: H04B10/077 ,  H04B10/07955 ,  H04B10/807

Abstract: A system for transmitting optical power from a first location to a second location. The system includes a first light source at the first location which generates a first light beam. A power converter detects the first light beam at the second location. A first control circuit coupled to the power converter operates a second light source at the second location to generate a return safety light beam after detection of the first light beam. A photodetector detects the return safety light beam at the first location. A second control circuit is coupled between the photodetector and the first light source. The second control circuit detects the presence of the return safety light beam and operates the first light source to generate the first light beam at a first power level prior to detecting the return safety light beam and at a second power level, higher than the first power level, after detecting the return safety light beam.

Abstract translation: 一种用于将光功率从第一位置传输到第二位置的系统。 该系统包括在第一位置产生第一光束的第一光源。 功率转换器在第二位置检测第一光束。 耦合到功率转换器的第一控制电路在第二位置操作第二光源，以在检测到第一光束之后产生返回安全光束。 光电检测器检测第一位置处的返回安全光束。 第二控制电路耦合在光电检测器和第一光源之间。 第二控制电路检测返回安全光束的存在并操作第一光源以在检测到返回安全光束之前产生处于第一功率电平的第一光束，并且在高于第一功率的第二功率电平 水平后，检测到返回安全光束。

公开(公告)号：US5760310A

公开(公告)日：1998-06-02

申请号：US770916

申请日：1996-12-20

Applicant: Stanley E. Rud, Jr. ,  William E. Petrich ,  Bennett L. Louwagie ,  Terrance F. Krouth

Inventor： Stanley E. Rud, Jr. ,  William E. Petrich ,  Bennett L. Louwagie ,  Terrance F. Krouth

IPC: G01L9/00 ,  G01L19/00 ,  G01L19/06 ,  G01M3/16

CPC classification number: G01L19/0672 ,  G01L19/0092 ,  G01L19/0645 ,  G01M3/16

Abstract: A pressure transmitter has a pressure sensor coupled to an isolator diaphragm by a fill fluid such as oil. According to the invention, means are provided for measuring the position of the isolator diaphragm and comparing the measured position with an expected position to give an indication of fill fluid leakage. Non-contact arrangements such as capacitive and ultrasonic techniques are disclosed for measuring isolator diaphragm position, as well as contacting arrangements such as switches. The fill fluid loss arrangement can be incorporated into a two-wire transmitter, which transmitter can be made to send a warning signal to a control unit when fill fluid loss is detected.

Abstract translation: 压力变送器具有通过诸如油的填充液体耦合到隔离膜的压力传感器。 根据本发明，提供了用于测量隔离膜片的位置并将测量位置与预期位置进行比较的装置，以给出填充流体泄漏的指示。 公开了诸如电容和超声波技术的非接触布置用于测量隔离膜的位置以及诸如开关的接触布置。 填充流体损失布置可以并入双线式发射器中，当检测到填充液体损失时，该发射器可以被发送给控制单元的警告信号。

公开(公告)号：US5727110A

公开(公告)日：1998-03-10

申请号：US547536

申请日：1995-10-24

Applicant: Michael J. Smith ,  George C. Hausler

Inventor： Michael J. Smith ,  George C. Hausler

IPC: G01D11/24 ,  G01R1/04 ,  G02B6/36 ,  G02B6/42

CPC classification number: G01R1/04 ,  G01D11/24

Abstract: A remotely powered field instrument comprises a housing with an electronics compartment, a terminal compartment, and a bulkhead separating the electronics compartment from the terminal compartment. A first electrical lead extends through the bulkhead. A mounting plate is secured within the terminal compartment. An interface module is positioned within the terminal compartment and secured to the mounting plate. The interface module comprises an optical connector, an optical-to-electrical converter coupled to the optical connector and a second electrical lead coupled between the optical-to-electrical converter and the first electrical lead.

Abstract translation: 远程供电的现场仪器包括具有电子室，壳体和终端隔室的壳体，以及将电子室与终端隔室分开的隔板。 第一个电线穿过隔板延伸。 安装板固定在端子室内。 接口模块定位在端子室内并固定到安装板上。 接口模块包括光学连接器，耦合到光学连接器的光电转换器和耦合在光 - 电转换器和第一电引线之间的第二电引线。

公开(公告)号：US5710552A

公开(公告)日：1998-01-20

申请号：US472695

申请日：1995-06-06

Applicant: Steven J. McCoy ,  Mark S. Schumacher ,  John A. Kielb ,  Donald F. Palan ,  Grant B. Edwards ,  Randy J. Longsdorf ,  James E. Templin

Inventor： Steven J. McCoy ,  Mark S. Schumacher ,  John A. Kielb ,  Donald F. Palan ,  Grant B. Edwards ,  Randy J. Longsdorf ,  James E. Templin

IPC: G01D3/08 ,  G01F23/284 ,  H02H9/00 ,  G08C19/16

CPC classification number: H02H9/008 ,  G01D3/08 ,  G01F23/284

Abstract: A barrier device threadably mounts to a cabling aperture on a field mounted transmitter. The field mounted transmitter receives and transmits signals, and is wholly powered by a current loop circuit. The barrier device has a conductive housing with at least a first and a second aperture and a pair of conductors passing through the first aperture of the barrier device, for connecting to a terminal block in the transmitter. A pair of signal terminals, preferably as ring tongue lug, is mounted in the second aperture of the barrier device. The signal terminals are connectable to a handheld communicator, which is used to calibrate, monitor and test the transmitter. A barrier circuit is mounted in the housing and is electrically connected between the signal terminals and the conductors. Signals from the communicator access the terminal block through the barrier circuit, and the barrier circuit limits the power available at the signal terminals. One embodiment of the barrier device has a third aperture directly across from the first aperture. The first aperture threadably connects to the transmitter, so that cabling from the transmitter can pass through a passageway formed between the first and third apertures. Another embodiment has a stub shaped housing, with one end of stub being the first aperture, and the other end being the second aperture. The first aperture threads to the cabling aperture on the transmitter, and the barrier circuit is potted in the stub shaped housing.

Abstract translation: 屏障装置螺纹地安装在现场安装的变送器上的布线孔中。 现场安装的发射机接收和发射信号，并由电流环路电路完全供电。 阻挡装置具有至少具有第一和第二孔径的导电壳体和穿过阻挡装置的第一孔的一对导体，用于连接到发射器中的端子块。 一对信号端子，优选地为环形舌片，安装在屏障装置的第二孔中。 信号端子可连接到手持通信器，用于校准，监控和测试发射机。 屏蔽电路安装在壳体中，并且电连接在信号端子和导体之间。 来自通信器的信号通过屏障电路接入端子块，并且屏障电路限制信号端子处的可用功率。 阻挡装置的一个实施例具有直接从第一孔直接穿过的第三孔。 第一个孔螺纹地连接到发射器，使得来自发射器的布线可以穿过形成在第一和第三孔之间的通道。 另一个实施例具有短截面的壳体，短截线的一端是第一孔，另一端是第二孔。 第一个孔径到发射机上的布线孔径，屏障电路被封装在短截线形壳体中。

公开(公告)号：US5695590A

公开(公告)日：1997-12-09

申请号：US486309

申请日：1995-06-07

Applicant: Charles R. Willcox ,  Larry A. Peitersen

Inventor： Charles R. Willcox ,  Larry A. Peitersen

IPC: G01L9/12 ,  G01L9/00 ,  G01L13/00 ,  B32B31/14

CPC classification number: G01L9/0073 ,  G01L9/0042

Abstract: A pedestal mount capacitive pressure sensor (10) is supported in a housing (11) and used to sense fluid pressures to provide air pressure data relating to the performance of air vehicles. The capacitive sensor uses a thick base plate (40) on which a diaphragm (48) is mounted. A capacitive electrode (52) is mounted to the diaphragm and pressure deflects the diaphragm to provide an output. The pressure sensor (10) is mounted in an outer housing (11) using a stress isolating pedestal (20).

Abstract translation: 基座安装电容式压力传感器（10）被支撑在壳体（11）中并且用于感测流体压力以提供与空中车辆的性能有关的气压数据。 电容式传感器使用安装有隔膜（48）的厚基板（40）。 电容电极（52）安装在隔膜上，压力使隔膜偏转以提供输出。 压力传感器（10）使用应力隔离基座（20）安装在外壳体（11）中。

公开(公告)号：US5691896A

公开(公告)日：1997-11-25

申请号：US515410

申请日：1995-08-15

Applicant: Hehong Zou ,  Kale P. Hedstrom ,  Jogesh Warrior ,  Coy L. Hays

Inventor： Hehong Zou ,  Kale P. Hedstrom ,  Jogesh Warrior ,  Coy L. Hays

IPC: G05B13/02 ,  G05B11/42 ,  G05B13/04 ,  G05B23/02

CPC classification number: G05B13/042 ,  G05B11/42

Abstract: A process control system controls a process through a control output signal based on a set point and a measured process variable. The process control system includes a control circuit having a set point input, a process variable input and a control output. The control circuit generates the control output signal on the control output as a function of the set point received on the set point input and the measured process variable received on the process variable input. An auto-tuning circuit excites the process, estimates a process model based on a rising dead time, a rising rate-of-change, a falling dead time and a falling rate-of-change in the measured process variable and then tunes the control function to the process 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 such in field-mounted control units.

Abstract translation: 过程控制系统通过基于设定点和测量过程变量的控制输出信号控制过程。 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。 控制电路根据设定点输入端接收的设定点和过程变量输入端接收的测量过程变量，在控制输出端产生控制输出信号。 自动调谐电路激励该过程，基于上升的死区时间，上升的变化率，下降的死区时间和下降的测量过程变量的变化估计一个过程模型，然后调整控制 基于过程模型的过程的功能。 自动调谐电路获得了可靠的结果，但是在计算上很简单，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，例如在现场安装的控制单元中。

公开(公告)号：US5637802A

公开(公告)日：1997-06-10

申请号：US395778

申请日：1995-02-28

Applicant: Roger L. Frick ,  Bennett L. Louwagie ,  Adrian C. Toy

Inventor： Roger L. Frick ,  Bennett L. Louwagie ,  Adrian C. Toy

IPC: G01L9/00 ,  G01L9/12 ,  G01L13/06

CPC classification number: G01L9/0075 ,  G01L9/125 ,  Y10T29/49142

Abstract: A transmitter in a process control system transmits a pressure over a process control loop. The transmitter includes I/O circuitry, compensation circuitry and an absolute pressure sensor. The I/O circuitry transmits information over the process control loop. Compensation circuitry receives a pressure related signal and responsively controls the I/O circuitry to transmit pressure information on the loop. The absolute pressure sensor includes a cavity which deforms as the sensor deflects in response to an applied pressure. A sensor in the cavity provides the pressure related signal to the compensation circuitry in response to the deformation.

Abstract translation: 过程控制系统中的变送器通过过程控制回路传送压力。 变送器包括I / O电路，补偿电路和绝对压力传感器。 I / O电路通过过程控制回路传输信息。 补偿电路接收与压力相关的信号，并且响应地控制I / O电路传送环路上的压力信息。 绝对压力传感器包括当传感器响应于施加的压力而偏转时变形的空腔。 空腔中的传感器响应于变形而将补偿电路的压力相关信号提供给补偿电路。

公开(公告)号：US5573032A

公开(公告)日：1996-11-12

申请号：US478506

申请日：1995-06-07

Applicant: Gary A. Lenz ,  Gregory C. Brown ,  Jogesh Warrior

Inventor： Gary A. Lenz ,  Gregory C. Brown ,  Jogesh Warrior

IPC: G05D3/12 ,  G05D7/00 ,  G05D7/06 ,  G05D16/20 ,  F16K31/126

CPC classification number: G05D7/005 ,  F16K31/1262 ,  F16K37/0083 ,  Y10T137/2452 ,  Y10T137/7759 ,  Y10T137/7761

Abstract: In this invention, a valve positioner receives a setpoint from a master and provides a control pressure to a valve actuator for controlling a valve. A sensing circuit in the positioner senses the position of the valve and the control pressure, and a control circuit in the positioner uses both the sensed pressure and position to provide a command output to a pneumatic section which produces the control pressure. In another embodiment of the invention, a positioner receives a setpoint from a master and provides a control pressure to a valve actuator for controlling a valve. A sensing circuit in the positioner senses the valve position and pneumatics in the positioner provide the control pressure as a function of the sensed position and an output from a control circuit within the positioner. The positioner includes a diagnostic circuit which stores a valve attribute and provides a diagnostic output as a function of the stored valve characteristic and a selected one of the sensed variables. In another embodiment of the invention, a positioner includes a correction circuit for storing a valve attribute affected by one of a set of physical parameters and for receiving a selected one of the set of sensed physical parameters. The correction means compensates a command output from a control circuit as a function of the sensed physical parameter and the stored valve characteristic. In another embodiment, the positioner includes a benchset control circuit which ramps the control pressure between an initial control pressure and a final control pressure and back to the initial control pressure, while sampling specific control pressures and their corresponding positions, in order to provide an output indicating the proper spring preload force on an actuator spring.

Abstract translation: 在本发明中，阀定位器从主机接收设定值，并向控制阀的阀致动器提供控制压力。 定位器中的检测电路检测阀的位置和控制压力，并且定位器中的控制电路使用感测到的压力和位置来向产生控制压力的气动部提供指令输出。 在本发明的另一个实施例中，定位器从主机接收设定值，并向控制阀的阀致动器提供控制压力。 定位器中的感测电路感测阀位置，并且定位器中的气动作为感测位置的函数提供控制压力，以及来自定位器内的控制电路的输出。 定位器包括诊断电路，其存储阀属性并提供作为存储的阀特性的函数的诊断输出和所感测的变量中的所选择的一个。 在本发明的另一个实施例中，定位器包括一个校正电路，用于存储受一组物理参数之一影响的阀门属性，并且用于接收该组感测物理参数中选定的一个。 校正装置补偿从控制电路输出的命令作为检测到的物理参数和存储的阀特性的函数。 在另一个实施例中，定位器包括一个台架控制电路，其在初始控制压力和最终控制压力之间斜升控制压力并返回初始控制压力，同时对特定控制压力及其对应位置进行采样，以便提供输出 指示执行器弹簧上的正确的弹簧预紧力。

公开(公告)号：US5558115A

公开(公告)日：1996-09-24

申请号：US481085

申请日：1995-06-07

Applicant: Gary A. Lenz ,  Gregory C. Brown ,  Jogesh Warrior

Inventor： Gary A. Lenz ,  Gregory C. Brown ,  Jogesh Warrior

IPC: G05D3/12 ,  G05D7/00 ,  G05D7/06 ,  G05D16/20 ,  F16K37/00

CPC classification number: G05D7/005 ,  F16K31/1262 ,  F16K37/0083 ,  Y10T137/2452 ,  Y10T137/7759 ,  Y10T137/7761

Abstract: In this invention, a valve positioner receives a setpoint from a master and provides a control pressure to a valve actuator for controlling a valve. A sensing circuit in the positioner senses the position of the valve and the control pressure, and a control circuit in the positioner uses both the sensed pressure and position to provide a command output to a pneumatic section which produces the control pressure. In another embodiment of the invention, a positioner receives a setpoint from a master and provides a control pressure to a valve actuator for controlling a valve. A sensing circuit in the positioner senses the valve position and pneumatics in the positioner provide the control pressure as a function of the sensed position and an output from a control circuit within the positioner. The positioner includes a diagnostic circuit which stores a valve attribute and provides a diagnostic output as a function of the stored valve characteristic and a selected one of the sensed variables. In another embodiment of the invention, a positioner includes a correction circuit for storing a valve attribute affected by one of a set of physical parameters and for receiving a selected one of the set of sensed physical parameters. The correction means compensates a command output from a control circuit as a function of the sensed physical parameter and the stored valve characteristic. In another embodiment, the positioner includes a benchset control circuit which ramps the control pressure between an initial control pressure and a final control pressure and back to the initial control pressure, while sampling specific control pressures and their corresponding positions, in order to provide an output indicating the proper spring preload force on an actuator spring.

公开(公告)号：US5524492A

公开(公告)日：1996-06-11

申请号：US538382

申请日：1995-10-03

Applicant: Roger L. Frick ,  Robert K. Snyder

Inventor： Roger L. Frick ,  Robert K. Snyder

IPC: G01L7/08 ,  G01L13/00 ,  G01L13/02 ,  G01L19/00 ,  G01L19/06 ,  G01L7/00

CPC classification number: G01L19/0645 ,  G01L19/0038

Abstract: A transmitter provides an output indicative of pressure of process fluid. The transmitter has a first body with a passageway filled with isolation fluid extending from a first port to a pressure sensor. A second body has an inlet for receiving process fluid and a second port. An isolation diaphragm between the first and second ports isolates process fluid from isolation fluid. A seal adjacent the diaphragm seals the diaphragm and couples the diaphragm to the second body. A spring urges the seal against the diaphragm.

Abstract translation: 变送器提供指示过程流体压力的输出。 变送器具有第一主体，其具有填充有从第一端口延伸到压力传感器的隔离流体的通道。 第二主体具有用于接收处理流体的入口和第二端口。 第一和第二端口之间的隔离隔离隔离了来自隔离流体的过程流体。 与隔膜相邻的密封件密封隔膜并将隔膜连接到第二主体。 一个弹簧促使密封抵靠隔膜。