利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

25 条记录 (耗时 0.03 秒)

    Three wire low power transmitter
    1.
    发明授权
    Three wire low power transmitter 失效
    三线低功率发射机

    公开(公告)号：US5245333A

    公开(公告)日：1993-09-14

    申请号：US766667

    申请日：1991-09-25

    申请人： Stephen D. Anderson ,  Roger L. Frick ,  Glen E. Monzo ,  Brian L. Westfield

    发明人： Stephen D. Anderson ,  Roger L. Frick ,  Glen E. Monzo ,  Brian L. Westfield

    IPC分类号： G08C19/02

    CPC分类号： G08C19/02

    摘要： A three wire transmitter bidirectionally communicates AC signals to and from a first external device and sends DC signals to a second external device. The transmitter includes a communication circuit which is energized from power and common terminals and includes memory storage for transmitter status and a process variable (PV). The communication circuit receives a sensor output indicative of the PV and provides the DC signal and the AC signal to a signal terminal which connects to both external devices, and also receives AC signals from the first external device. The communications circuit has a characteristic AC impedance between the signal and common terminals over an AC frequency range for receiving and transmitting AC signals to and from the first external device so that the receiving signals are not shorted out and so the transmitted signals can be received. The communications circuit has a characteristic DC impedance between the signal and common terminals over a range of frequencies which include DC and typically extend to approximately 20 Hz. The characteristic impedance is substantially lower than the impedance of the second external device which receives DC signals so that the accuracy of the DC signal is not compromised.

    摘要翻译： 三线制发射机将交流信号双向地传送到第一外部设备并从第一外部设备传送直流信号到第二外部设备。 发射机包括一个从电源和公共终端通电的通信电路，包括用于发射机状态的存储器和一个过程变量（PV）。 通信电路接收表示PV的传感器输出，并将DC信号和AC信号提供给连接到两个外部设备的信号端子，并且还从第一外部设备接收AC信号。 该通信电路具有在交流频率范围内的信号与公共端之间的特征交流阻抗，用于从第一外部装置接收和发送交流信号，使得接收信号不被短路，因此可以接收所发送的信号。 通信电路在包括DC并且通常延伸到大约20Hz的频率范围内在信号和公共端子之间具有特征的DC阻抗。 特征阻抗基本上低于接收DC信号的第二外部设备的阻抗，使得DC信号的精度不受影响。

    Charge balanced feedback transmitter
    2.
    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。

    Conversion circuit for process control system
    4.
    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：US06307483B1

    公开(公告)日：2001-10-23

    申请号：US09287775

    申请日：1999-04-07

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

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

    IPC分类号： G08C1904

    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。

    Conversion circuit for process control system
    6.
    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
    7.
    发明授权
    Process variable transmitter with two-wire process control loop diagnostics 有权
    具有二线过程控制回路诊断功能的过程变量变送器

    公开(公告)号：US09182256B2

    公开(公告)日：2015-11-10

    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： G01R11/17 ,  G01R11/16 ,  G06F3/00 ,  G06F3/01 ,  G01D21/00 ,  G05B19/042

    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。

    RF adapter for field device with loop current bypass
    8.
    发明授权
    RF adapter for field device with loop current bypass 有权
    射频适配器，用于带环路电流旁路的现场设备

    公开(公告)号：US08049361B2

    公开(公告)日：2011-11-01

    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： H02J3/00

    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。

    RF adapter for field device with low voltage intrinsic safety clamping
    9.
    发明授权
    RF adapter for field device with low voltage intrinsic safety clamping 有权
    射频适配器，用于现场设备，具有低电压本质安全钳位

    公开(公告)号：US08787848B2

    公开(公告)日：2014-07-22

    申请号：US12486269

    申请日：2009-06-17

    申请人： John A. Kielb ,  Brian L. Westfield ,  Kelly M. Orth

    发明人： John A. Kielb ,  Brian L. Westfield ,  Kelly M. Orth

    IPC分类号： H01Q11/12 ,  H04B1/04

    CPC分类号： G05B19/4185 ,  G01D21/00 ,  G05B2219/31121 ,  G05B2219/33192 ,  G05B2219/34313 ,  G08C17/02 ,  Y02P80/114 ,  Y02P90/18 ,  Y02P90/86

    摘要： An adapter for coupling to a process control transmitter of the type used to monitor a process variable in an industrial process includes a first connection configured to couple to a first side of a two wire process control loop, a second connection configured to couple to a second side of the two wire process control loop and in series with a first connection to a process control transmitter, and a third connection configured to couple to a second connection of the process control transmitter. Wireless communication circuitry is coupled to at least the third connection and is configured to provide wireless communication for the process control transmitter. Intrinsic safety circuitry coupled to at least one of the first, second and third connections is configured to limit transfer of electrical energy to a value which is less than an intrinsic safety value.

    摘要翻译： 用于耦合到用于监测工业过程中的过程变量的类型的过程控制变送器的适配器包括被配置为耦合到双线过程控制回路的第一侧的第一连接，被配置为耦合到第二连接的第二连接 并且与第一连接到过程控制发送器串联，以及第三连接，其被配置为耦合到过程控制发送器的第二连接。 无线通信电路耦合到至少第三连接，并且被配置为为过程控制发送器提供无线通信。 耦合到第一，第二和第三连接中的至少一个的本质安全电路被配置为将电能的转移限制到小于本征安全值的值。

    Form factor and electromagnetic interference protection for process device wireless adapters
    10.
    发明授权
    Form factor and electromagnetic interference protection for process device wireless adapters 有权
    过程设备无线适配器的外形和电磁干扰保护

    公开(公告)号：US08694060B2

    公开(公告)日：2014-04-08

    申请号：US12485189

    申请日：2009-06-16

    申请人： Joel D. Vanderaa ,  Christina A. Grunig ,  Ronald F. Hurd ,  Brian L. Westfield ,  Chad M. McGuire ,  Steven B. Paullus

    发明人： Joel D. Vanderaa ,  Christina A. Grunig ,  Ronald F. Hurd ,  Brian L. Westfield ,  Chad M. McGuire ,  Steven B. Paullus

    IPC分类号： H04M1/00 ,  H01Q1/24 ,  H04B1/16

    CPC分类号： G08C17/04

    摘要： A process device wireless adapter includes a wireless communications module, a metallic housing, and an antenna. The wireless communications module is configured to communicatively couple to a process device and to a wireless receiver. The metallic housing surrounds the wireless communication module and has a first end and a second end. The first end is configured to attach to the process device. In one embodiment, a metallic shield contacts the housing second end such that the metallic shield and the housing form a substantially continuous conductive surface. The antenna is communicatively coupled to the wireless communication module and separated from the wireless communication module by the metallic shield. Preferably, the wireless communications module illustratively includes a printed circuit board that has a length that is greater than its width.

    摘要翻译： 处理设备无线适配器包括无线通信模块，金属外壳和天线。 无线通信模块被配置为通信地耦合到处理设备和无线接收器。 金属外壳包围无线通信模块，并具有第一端和第二端。 第一端被配置为附加到处理设备。 在一个实施例中，金属屏蔽件接触壳体的第二端，使得金属屏蔽和壳体形成基本上连续的导电表面。 天线通信地耦合到无线通信模块，并通过金属屏蔽与无线通信模块分离。 优选地，无线通信模块示例性地包括具有大于其宽度的长度的印刷电路板。