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25 条记录 (耗时 0.021 秒)

    Charge balanced feedback transmitter
    12.
    发明授权
    Charge balanced feedback transmitter 失效
    充电平衡反馈变送器

    公开(公告)号：US4878012A

    公开(公告)日：1989-10-31

    申请号：US205268

    申请日：1988-06-10

    申请人： John P. Schulte ,  Kelly M. Orth ,  Roger L. Frick ,  Brian L. Westfield ,  Randy K. Paschke

    发明人： John P. Schulte ,  Kelly M. Orth ,  Roger L. Frick ,  Brian L. Westfield ,  Randy K. Paschke

    IPC分类号： G01D5/24 ,  G01L9/12 ,  G01R27/26

    CPC分类号： G01L9/12 ,  G01D5/24 ,  G01R27/2605

    摘要： A charge balanced feedback type transmitter generates charge packets representative of a sensed parameter. Improved performance is achieved by the additiion of resistance connected between a charge packet generating reactance and an integrator to reduce the effects of noise caused by switching transients and by ground noise which is coupled to the charge packet generating circuitry by stray capacitance. The charge packets are integrated by the integrater, and the integrator output is supplied from a selective basis to the input of a comparator. The output of the comparator is used to control the application of charge packets to the integrator to achieve charge balance. The input of the comparator is selectively connected to the output of the integrator, to a first supply voltage, or to a second supply voltage to ensure a stable output of the comparator at a critical time when charge is being supplied to the integrator.

    摘要翻译： 电荷平衡反馈型发射器产生表示感测参数的电荷分组。 通过增加连接在电荷分组产生电抗和积分器之间的电阻来实现改进的性能，以减少由开关瞬变引起的噪声的影响，以及通过杂散电容耦合到电荷分组产生电路的地面噪声。 电荷分组由积分器积分，积分器输出从选择性提供给比较器的输入。 比较器的输出用于控制对积分器的电荷分组的应用，以实现电荷平衡。 比较器的输入选择性地连接到积分器的输出到第一电源电压或第二电源电压，以确保在向积分器供电的关键时刻稳定的比较器输出。

    Process field device temperature control
    13.
    发明授权
    Process field device temperature control 有权
    过程现场设备温度控制

    公开(公告)号：US07679033B2

    公开(公告)日：2010-03-16

    申请号：US11238656

    申请日：2005-09-29

    申请人： Brian L. Westfield ,  Kelly M. Orth

    发明人： Brian L. Westfield ,  Kelly M. Orth

    IPC分类号： H05B3/68 ,  H05B1/02 ,  H05B3/78

    CPC分类号： G05B19/0423 ,  G01L19/04 ,  G05B2219/25428 ,  G05B2219/31121 ,  G05D23/19

    摘要： A field device system for use in an industrial process includes a field device configured to couple to the industrial process and monitor or control the industrial process. The field device provides a temperature control signal output related to a temperature of the field device. A heater coupled to the field device heats the field device in response to the temperature control signal.

    摘要翻译： 用于工业过程的现场设备系统包括被配置为耦合到工业过程并监视或控制工业过程的现场设备。 现场设备提供与现场设备的温度相关的温度控制信号输出。 耦合到现场设备的加热器响应于温度控制信号加热现场设备。

    RF ADAPTER FOR FIELD DEVICE WITH LOOP CURRENT BYPASS
    14.
    发明申请
    RF ADAPTER FOR FIELD DEVICE WITH LOOP CURRENT BYPASS 有权
    具有环路电流旁路的现场设备的RF适配器

    公开(公告)号：US20090311971A1

    公开(公告)日：2009-12-17

    申请号：US12486253

    申请日：2009-06-17

    申请人： John A. Kielb ,  Brian L. Westfield

    发明人： John A. Kielb ,  Brian L. Westfield

    IPC分类号： H04B1/38 ,  G08B29/00

    CPC分类号： H04L12/40045 ,  G05B19/0423 ,  G05B2219/25191 ,  G05B2219/25196 ,  H04L12/40176 ,  H04L2012/4026 ,  Y10T307/445

    摘要： A wireless adapter for use with a two-wire process control loop is configured to couple to a process field device in an industrial process control system. The wireless adapter is coupled to the two-wire process control loop and provides wireless communication to the process field device. The adapter includes first and second loop terminals configured to couple in series with the two-wire process control loop. Wireless communication circuitry is coupled to the first and second loop terminals and is adapted to provide wireless communication to the process field device. Loop current bypass circuitry is electrically connected between the first and second loop terminals and is configured to provide a loop current path therebetween in response to an open circuit in wireless communication circuitry.

    摘要翻译： 用于两线过程控制回路的无线适配器被配置为耦合到工业过程控制系统中的过程现场设备。 无线适配器耦合到两线制过程控制回路，并向过程现场设备提供无线通信。 适配器包括被配置为与两线制过程控制回路串联耦合的第一和第二回路端子。 无线通信电路耦合到第一和第二环路终端，并且适于向该过程现场设备提供无线通信。 环路电流旁路电路电连接在第一和第二环路端子之间，并且被配置为响应于无线通信电路中的开路而在其间提供环路电流路径。

    Process transmitter having a step-up converter for powering analog components
    15.
    发明授权
    Process transmitter having a step-up converter for powering analog components 有权
    具有用于为模拟组件供电的升压转换器的过程变送器

    公开(公告)号：US06813318B1

    公开(公告)日：2004-11-02

    申请号：US09303050

    申请日：1999-04-30

    申请人： Brian L. Westfield ,  Weston T. Roper ,  David G. Tyson

    发明人： Brian L. Westfield ,  Weston T. Roper ,  David G. Tyson

    IPC分类号： H04L2720

    CPC分类号： G05B19/042 ,  G05B19/4185

    摘要： A process transmitter suitable for coupling to a process loop. The process transmitter includes a power regulator adapted to receive a power signal on the process loop and to provide a first signal having a first voltage. Digital components of the process transmitter are electrically coupled to the power regulator to receive power from the first signal. A step-up converter is electrically coupled to the power regulator and receives the first signal. The step-up converter outputs a second signal having a second voltage larger than the first voltage. Analog components of the process transmitter are electrically coupled to the step-up converter to receive power from the second signal.

    摘要翻译： 适用于耦合到过程回路的过程变送器。 过程变送器包括适于在过程回路上接收功率信号并提供具有第一电压的第一信号的功率调节器。 过程变送器的数字部件电耦合到功率调节器以从第一信号接收功率。 升压转换器电耦合到功率调节器并接收第一信号。 升压转换器输出具有大于第一电压的第二电压的第二信号。 过程变送器的模拟部件电耦合到升压转换器以从第二信号接收功率。

    Multiple die industrial process control transmitter
    18.
    发明授权
    Multiple die industrial process control transmitter 有权
    多模工业过程控制变送器

    公开(公告)号：US06480131B1

    公开(公告)日：2002-11-12

    申请号：US09636152

    申请日：2000-08-10

    申请人： Weston R. Roper ,  David G. Tyson ,  Brian L. Westfield ,  Michael J. Gaboury

    发明人： Weston R. Roper ,  David G. Tyson ,  Brian L. Westfield ,  Michael J. Gaboury

    IPC分类号： H03M112

    CPC分类号： G05B19/4142 ,  G05B19/0423 ,  G05B2219/31121 ,  G05B2219/31126 ,  G05B2219/33197 ,  G05B2219/34309

    摘要： A two-wire industrial process control transmitter includes a sensor, at least two integrated circuits, and a level shift circuit. The first integrated circuit contains the analog measurement circuit that includes a sensor detection circuit and the analog portion of a digital-to-analog convertor. The second integrated circuit contains the digital system circuit that includes a modem and the digital portion of the analog-to-digital convertor. The first and second ICs may be powered at different voltage levels to maximize the power of the analog circuit and improve resolution. Alternatively, the ICs may be powered at the same voltage level, but the digital circuits are divided among several stacked dies to minimize the voltage for each digital circuit. In either case, the level shifting circuit shifts the voltage level between the analog and digital circuits.

    摘要翻译： 双线工业过程控制发射机包括传感器，至少两个集成电路和电平移位电路。 第一集成电路包含模拟测量电路，其包括传感器检测电路和数模转换器的模拟部分。 第二集成电路包含数字系统电路，其包括调制解调器和模拟 - 数字转换器的数字部分。 第一和第二IC可以以不同的电压电平供电，以最大化模拟电路的功率并提高分辨率。 或者，IC可以以相同的电压电平供电，但是数字电路在几个堆叠的管芯之间分开，以使每个数字电路的电压最小化。 在任一情况下，电平移位电路使模拟和数字电路之间的电压电平移位。

    Conversion circuit for process control system
    19.
    发明授权
    Conversion circuit for process control system 失效
    过程控制系统转换电路

    公开(公告)号：US5650777A

    公开(公告)日：1997-07-22

    申请号：US479801

    申请日：1995-06-07

    申请人： Brian L. Westfield ,  Stephen D. Anderson ,  Bennett L. Louwagie ,  Todd A. Piechowski

    发明人： Brian L. Westfield ,  Stephen D. Anderson ,  Bennett L. Louwagie ,  Todd A. Piechowski

    IPC分类号： G05B11/36 ,  G05B19/042 ,  G05B19/418 ,  H04L25/02 ,  G08C19/36

    CPC分类号： G05B19/0423 ,  G05B19/4185 ,  G05B2219/25189 ,  G05B2219/25191 ,  G05B2219/31121 ,  G05B2219/31126 ,  G05B2219/31135 ,  G05B2219/33197 ,  Y02P90/18

    摘要： Conversion circuitry for use in a process control system is adapted for coupling to a primary process control loop. Digital receiver circuitry in the conversion circuitry receives a digital signal transmitted over the primary process control loop from a field transmitter and responsively provides a digital output. A microprocessor receives the digital output and responsively provides a secondary loop control output. Secondary loop control circuitry for coupling to a secondary process control loop receives the secondary loop control output from the microprocessor and responsively controls current flowing through the secondary process control loop. The current flowing through the secondary process control loop is related to the digital signal transmitted by the field transmitter.

    摘要翻译： 用于过程控制系统的转换电路适于耦合到主过程控制回路。 转换电路中的数字接收机电路接收从现场发射机通过主过程控制回路传输的数字信号，并且响应地提供数字输出。 微处理器接收数字输出并且响应地提供辅助回路控制输出。 用于耦合到次级过程控制回路的二次回路控制电路接收来自微处理器的次级回路控制输出，并且响应地控制流过次级过程控制回路的电流。 流过次级过程控制回路的电流与现场发射机发射的数字信号有关。

    PROCESS VARIABLE TRANSMITTER WITH TWO-WIRE PROCESS CONTROL LOOP DIAGNOSTICS
    20.
    发明申请
    PROCESS VARIABLE TRANSMITTER WITH TWO-WIRE PROCESS CONTROL LOOP DIAGNOSTICS 有权
    具有两线工艺控制环路诊断的过程变量变送器

    公开(公告)号：US20110010120A1

    公开(公告)日：2011-01-13

    申请号：US12832341

    申请日：2010-07-08

    申请人： David L. Wehrs ,  Gregory J. LeCuyer ,  Jessica Lo ,  Steven J. McCoy ,  Brian L. Westfield

    发明人： David L. Wehrs ,  Gregory J. LeCuyer ,  Jessica Lo ,  Steven J. McCoy ,  Brian L. Westfield

    IPC分类号： G01R19/00 ,  G01R27/02 ,  G06F19/00

    CPC分类号： G01D21/00 ,  G05B19/0423 ,  G05B2219/24069

    摘要： A two-wire process variable transmitter for use in an industrial process, including a process variable sensor configured to sense a process variable of a fluid of the industrial process. Output circuitry is configured to provide an output on a two-wire process control loop which is related to the sensed process variable. Loop current measurement circuitry measures a loop current flowing through the two-wire process control loop and terminal voltage measurement circuitry measures a voltage related to a terminal voltage of the process variable transmitter. The terminal voltage can be a voltage measured across an electrical connection of the two-wire process variable transmitter to the two-wire process control loop. Input circuitry is configured to receive a diagnostic command from the two-wire process control loop. A microprocessor configured to perform loop diagnostics on the two-wire process control loop based upon the measured loop current and terminal voltage in response to receipt of a diagnostic command from the two-wire process control loop.

    摘要翻译： 一种用于工业过程的二线过程变量变送器，包括被配置为感测工业过程流体的过程变量的过程变量传感器。 输出电路被配置为在与所感测的过程变量相关的二线过程控制回路上提供输出。 回路电流测量电路测量流过两线制过程控制回路的回路电流，并且端子电压测量电路测量与过程变量变送器的端子电压相关的电压。 端子电压可以是两线制过程变量发射机与两线制过程控制回路的电气连接测量的电压。 输入电路配置为从两线制过程控制回路接收诊断命令。 该微处理器被配置为响应于从两线制过程控制回路接收到诊断命令，基于所测量的回路电流和端子电压在两线制过程控制回路上执行循环诊断。