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    RF adapter for field device with low voltage intrinsic safety clamping
    1.
    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。

    RF ADAPTER FOR FIELD DEVICE WITH LOW VOLTAGE INTRINSIC SAFETY CLAMPING
    3.
    发明申请
    RF ADAPTER FOR FIELD DEVICE WITH LOW VOLTAGE INTRINSIC SAFETY CLAMPING 有权
    用于具有低电压内部安全钳位的现场设备的RF适配器

    公开(公告)号：US20090253388A1

    公开(公告)日：2009-10-08

    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： 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。

    RF adapter for field device with loop current bypass
    5.
    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 LOOP CURRENT BYPASS
    6.
    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。

    RF adapter for field device with variable voltage drop
    7.
    发明授权
    RF adapter for field device with variable voltage drop 有权
    射频适配器，适用于具有可变电压降的现场设备

    公开(公告)号：US08847571B2

    公开(公告)日：2014-09-30

    申请号：US12486282

    申请日：2009-06-17

    申请人： John A. Kielb

    发明人： John A. Kielb

    IPC分类号： G05F1/613 ,  G05F3/16 ,  G05F1/00 ,  G05B23/02 ,  G05B19/042

    CPC分类号： G05B19/0423 ,  G05B2219/25187 ,  G05B2219/25428

    摘要： A wireless adapter for use in a two-wire process control loop includes wireless communication circuitry and first and second terminals configured to couple in series with the two-wire process control loop. A regulator having a regulated input is coupled to the first terminal and an output. A shunt is coupled to the output of the regulator and is configured to provide power to the wireless communication circuitry. A feedback circuit is configured to control current flowing from the regulator to the shunt as a function of a loop current flowing through the two-wire process control loop.

    摘要翻译： 用于两线制过程控制回路的无线适配器包括无线通信电路和被配置为与两线过程控制回路串联耦合的第一和第二终端。 具有调节输入的调节器耦合到第一端子和输出端。 分流器耦合到调节器的输出端并且被配置为向无线通信电路提供电力。 反馈电路被配置为根据流过二线过程控制回路的回路电流来控制从调节器流向分流器的电流。

    Cold junction compensation for thermocouple
    8.
    发明授权
    Cold junction compensation for thermocouple 失效
    冷端补偿热电偶

    公开(公告)号：US4623266A

    公开(公告)日：1986-11-18

    申请号：US779514

    申请日：1985-09-24

    申请人： John A. Kielb

    发明人： John A. Kielb

    IPC分类号： G01K7/13 ,  G01K7/20 ,  G01K7/12

    CPC分类号： G01K7/13 ,  G01K7/20

    摘要： A cold junction compensation bridge for a thermocouple circuit includes a temperature compensation resistor encased in a heat conductive material and is directly connected to the same terminal block or strip to which the thermocouple leads are attached. The compensation resistor is in the same chamber of a housing as the cold junction of the thermocouple so it is subjected to the same temperature as the thermocouple junction. This is of particular importance in two wire current transmitters wherein the housings are multi compartment, with the electronics in one compartment (that may be sealed and not normally opened) and the terminal blocks for connecting the thermocouple and the like, as well as the calibrating screws, in a separate compartment. In such arrangements the thermocouple cold junction can be at a different temperature than the rest of the electronics. In the present invention, the cold junction compensation resistor is in the same location as the junctions of the thermocouple to insure that any changes in temperature of the cold junction are sensed by the resistor.

    摘要翻译： 用于热电偶电路的冷端补偿桥包括封装在导热材料中的温度补偿电阻器，并且直接连接到热电偶引线所连接的相同的端子块或带上。 补偿电阻与外壳的同一个室内，与热电偶的冷接点相同，因此其受热温度与热电偶接头相同。 这在两线电流变送器中特别重要，其中壳体是多隔室，电子器件在一个隔室中（可以是密封的而不是常开的）和用于连接热电偶等的端子块以及校准 螺丝，在一个单独的隔间。 在这种布置中，热电偶冷接点可能处于与电子设备其余部分不同的温度。 在本发明中，冷端补偿电阻器位于与热电偶的接头相同的位置，以确保冷端的温度的任何变化被电阻器感测到。

    Two-wire level transmitter
    9.
    发明授权
    Two-wire level transmitter 失效
    双线液位变送器

    公开(公告)号：US5672975A

    公开(公告)日：1997-09-30

    申请号：US486649

    申请日：1995-06-07

    申请人： John A. Kielb ,  Richard L. Nelson ,  Scott D. Manicor

    发明人： John A. Kielb ,  Richard L. Nelson ,  Scott D. Manicor

    IPC分类号： G01F23/284 ,  G01S13/10 ,  G01F23/28

    CPC分类号： G01F23/284

    摘要： A level transmitter for use in a process application measures height of a product in a tank. The level transmitter includes a microwave antenna directed into the tank. A low power microwave source sends a microwave signal through the microwave antenna. A low power microwave receiver receives a reflected microwave signal. Measurement circuitry coupled to the source and receiver initiates transmitting of the microwave signal and determines product height based upon the received, reflected signal. Output circuitry coupled to a two-wire process control loop transmits information related to product height over the loop. Power supply circuitry in the level transmitter coupled to the two-wire process control loop receives power from the loop which powers the level transmitter including the microwave source and the microwave receiver.

    摘要翻译： 用于过程应用的液位变送器可测量油箱中产品的高度。 液位变送器包括一个导入油箱的微波天线。 低功率微波源通过微波天线发送微波信号。 低功率微波接收器接收反射的微波信号。 耦合到源和接收器的测量电路启动微波信号的发射并基于所接收的反射信号确定产品高度。 耦合到二线过程控制回路的输出电路传输与循环上的产品高度相关的信息。 耦合到二线过程控制回路的电平变送器中的电源电路从环路接收功率，该环路为包括微波源和微波接收器的电平变送器供电。

    Digital converter apparatus for improving the output of a two-wire transmitter
    10.
    发明授权
    Digital converter apparatus for improving the output of a two-wire transmitter 失效
    数字转换装置，用于改善双线发射机的输出

    公开(公告)号：US5187474A

    公开(公告)日：1993-02-16

    申请号：US188110

    申请日：1988-04-28

    申请人： John A. Kielb ,  Richard L. Nelson ,  David L. Pederson

    发明人： John A. Kielb ,  Richard L. Nelson ,  David L. Pederson

    IPC分类号： G08C19/02

    CPC分类号： G08C19/02

    摘要： An existing analog two-wire transmitter has a sensor module, an analog excitation circuit, and an analog detector circuit which provides an output representative of a sensed process variable, such as pressure, to a two-wire current loop. The analog detection circuit is removed and replaced with apparatus including a digital converter that digitally calculates the transmitter's output. The output is improved by calculating correction for linearity. The analog excitation circuit may also be replaced with a replacement excitation circuit. The replacement excitation circuit and the digital converter can be energized in series to control energization current. A charge pump can be coupled to the loop to balance the current in the series circuit. The digital converter can also provide electrical span and zero adjustments.

    摘要翻译： 现有的模拟双线发射机具有传感器模块，模拟激励电路和模拟检测器电路，其向双线电流回路提供表示感测的过程变量（例如压力）的输出。 模拟检测电路被去除，并用包括数字计算发射器输出的数字转换器的装置代替。 通过计算线性校正来改善输出。 也可以用替换激励电路代替模拟激励电路。 替代激励电路和数字转换器可以串联通电以控制通电电流。 电荷泵可以耦合到回路以平衡串联电路中的电流。 数字转换器还可以提供电气跨度和零点调整。