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    Process transmitter communication circuit
    2.
    发明授权
    Process transmitter communication circuit 失效
    过程变送器通讯电路

    公开(公告)号：US6006338A

    公开(公告)日：1999-12-21

    申请号：US890169

    申请日：1997-07-09

    申请人： Randy J. Longsdorf ,  Grant B. Edwards ,  Richard L. Nelson ,  David L. Pederson

    发明人： Randy J. Longsdorf ,  Grant B. Edwards ,  Richard L. Nelson ,  David L. Pederson

    IPC分类号： G05B19/418 ,  G01C25/00

    CPC分类号： G05B19/4185 ,  Y02P90/18

    摘要： A process transmitter communications circuit has link terminals which are coupled to a process link, which supplies power to the circuit. A power source is coupled to one of the link terminals and is independent from the power supplied from the process link. Communications circuitry is coupled to the power source and link terminals, which transmits a transmitter signal over the process link, through the link terminals. A power sensing component is coupled to at least one of the link terminals and the communications circuitry and senses whether the power supplied by the process link is inadequate to transmit the transmitter signal. A power control component is coupled to the power source, the link terminals and the communications circuitry and selectively applies power from the power source to the communications circuitry for transmitting the transmitter signal when the power sensing component senses there is inadequate power supplied by the process link.

    摘要翻译： 过程发射机通信电路具有耦合到处理链路的链路终端，该过程链路向电路供电。 电源耦合到链路终端中的一个，并且独立于从过程链路提供的电力。 通信电路耦合到电源和链路终端，电源和链路终端通过链​​路终端在过程链路上发送发射机信号。 功率感测组件耦合到链路终端和通信电路中的至少一个，并且感测由过程链路提供的功率是否不足以发送发射机信号。 功率控制部件耦合到电源，链路终端和通信电路，并且当功率感测部件感测到由处理链路提供的不足的功率时，从电源将功率选择性地施加到用于发送发射机信号的通信电路 。

    Lightning protection for field mounted instruments
    3.
    发明授权
    Lightning protection for field mounted instruments 失效
    现场安装仪表防雷

    公开(公告)号：US5323289A

    公开(公告)日：1994-06-21

    申请号：US960269

    申请日：1992-10-13

    申请人： Randy J. Longsdorf ,  Richard L. Nelson

    发明人： Randy J. Longsdorf ,  Richard L. Nelson

    IPC分类号： H02H9/06 ,  H02H1/04 ,  H02H3/22

    CPC分类号： H02H9/06

    摘要： A protection circuit is provided for protecting sensitive electrical field instruments from a transient voltage strike and for ensuring that the instruments will meet safety approval during high potential voltage testing. The first and second wires of a two-wire circuit are connected to a first and second terminal respectively. A first surge arrestor electrically couples a first path between the first and second terminal. An impedance and a transient suppressor are connected in series and electrically couple a second path between the first and second terminal. The second path is coupled in parallel with the first path between the first and second terminal and is coupled closer to the internal components of the electrical instruments to be protected than is the first path. A second surge arrestor is electrically coupled between the second terminal and ground, and has a higher voltage breakdown potential than the first surge arrestor.

    摘要翻译： 提供了一种保护电路，用于保护敏感电场仪器免受瞬态电压冲击，并确保仪器在高电压电压测试期间将符合安全认证。 两线电路的第一和第二线分别连接到第一和第二端子。 第一浪涌抑制器电耦合第一和第二端子之间的第一路径。 阻抗和瞬态抑制器串联连接并且电耦合第一和第二端子之间的第二路径。 第二路径与第一和第二端子之间的第一路径并联耦合，并且比第一路径更靠近待保护的电气设备的内部部件耦合。 第二电涌放电器电耦合在第二端子和地之间，并且具有比第一电涌放电器更高的电压击穿电位。

    Barrier device
    4.
    发明授权
    Barrier device 失效
    屏障装置

    公开(公告)号：US5710552A

    公开(公告)日：1998-01-20

    申请号：US472695

    申请日：1995-06-06

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

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

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

    CPC分类号： H02H9/008 ,  G01D3/08 ,  G01F23/284

    摘要： 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.

    摘要翻译： 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。

    Process device with vibration based diagnostics
    5.
    发明授权
    Process device with vibration based diagnostics 有权
    具有振动诊断功能的过程装置

    公开(公告)号：US07627441B2

    公开(公告)日：2009-12-01

    申请号：US10675014

    申请日：2003-09-30

    申请人： Randy J. Longsdorf ,  Chad C. Blumeyer

    发明人： Randy J. Longsdorf ,  Chad C. Blumeyer

    IPC分类号： G05B13/00 ,  G01F1/84

    CPC分类号： G05B23/027

    摘要： An process device for use in an industrial process control or monitoring system is configured to couple to a process. A vibration sensor is configured to sense vibrations. Diagnostic circuitry provides a diagnostic output based upon the sensed vibrations.

    摘要翻译： 用于工业过程控制或监测系统的过程装置被配置为耦合到包括承载过程流体的管道的过程。 振动传感器被配置为感测来自该过程的振动。 诊断电路提供与过程干扰相关的诊断输出或基于感测到的振动的过程组件的操作。

    Process control loop current verification
    6.
    发明授权
    Process control loop current verification 有权
    过程控制回路电流验证

    公开(公告)号：US07280048B2

    公开(公告)日：2007-10-09

    申请号：US11095386

    申请日：2005-03-31

    申请人： Randy J. Longsdorf ,  Garrie D. Huisenga ,  James A. Johnson

    发明人： Randy J. Longsdorf ,  Garrie D. Huisenga ,  James A. Johnson

    IPC分类号： G08B21/00

    CPC分类号： G01R19/2509 ,  G05B19/0425 ,  G05B2219/25189 ,  G05B2219/25428 ,  G08C19/02

    摘要： A process device is configured for coupling to a two wire process control loop. Loop current output circuitry is configured to apply an output current to the two wire process control loop. Loop current verification circuitry is coupled to the two wire process control loop and configured to detect errors in the applied output current. At least a portion of the loop current verification circuitry is independent from the loop current output circuitry.

    摘要翻译： 处理装置被配置为耦合到双线过程控制回路。 环路电流输出电路被配置为将输出电流施加到两线制过程控制回路。 环路电流验证电路耦合到两线制过程控制回路，并配置为检测所施加的输出电流中的误差。 环路电流验证电路的至少一部分与环路电流输出电路无关。

    Interface controller for matching a process address field from a plurality of fields and generating a corresponding device address field
    8.
    发明授权
    Interface controller for matching a process address field from a plurality of fields and generating a corresponding device address field 失效
    接口控制器，用于匹配来自多个场的处理地址字段并生成对应的设备地址字段

    公开(公告)号：US5410730A

    公开(公告)日：1995-04-25

    申请号：US157982

    申请日：1993-11-23

    申请人： Randy J. Longsdorf ,  David L. Pederson

    发明人： Randy J. Longsdorf ,  David L. Pederson

    IPC分类号： G05B19/418 ,  G11C8/00

    CPC分类号： G05B19/4185 ,  G05B2219/31121 ,  G05B2219/31166 ,  G05B2219/33184 ,  G05B2219/33187 ,  G05B2219/37003 ,  Y02P90/18

    摘要： An apparatus receives a query from a process controller containing a process variable address representing a storage location for a process variable in a network of field devices. A communication standard type and an unique field device address is associated with each field device. An associating section identifies a field device address and a communication standard type associated with each of a plurality of process variable addresses. An extracting section matches the stored process variable address with a process variable address in the associating section and extracts the associated field device address and the associated communication standard type from the associating section. A generating section generates a field device request containing the extracted associated field device address as a function of the extracted associated communication standard type. The field device request is conveyable over a communication line to address the storage location represented by the stored process variable address.

    摘要翻译： 装置从过程控制器接收包含表示现场设备网络中的过程变量的存储位置的过程变量地址的查询。 通信标准类型和唯一的现场设备地址与每个现场设备相关联。 关联部分识别与多个过程变量地址中的每一个相关联的现场设备地址和通信标准类型。 提取部分将存储的过程变量地址与关联部分中的过程变量地址相匹配，并从关联部分提取相关联的现场设备地址和相关联的通信标准类型。 生成部分根据提取的相关联的通信标准类型生成包含提取的相关联的现场设备地址的现场设备请求。 现场设备请求可以通过通信线路传送，以寻址由存储的过程变量地址表示的存储位置。

    Two-wire transmitter with threshold detection circuit
    9.
    发明授权
    Two-wire transmitter with threshold detection circuit 失效
    具有阈值检测电路的双线变送器

    公开(公告)号：US4804958A

    公开(公告)日：1989-02-14

    申请号：US107297

    申请日：1987-10-09

    申请人： Randy J. Longsdorf

    发明人： Randy J. Longsdorf

    IPC分类号： G08C19/02 ,  G08C19/10 ,  G08C9/06

    CPC分类号： G08C19/02

    摘要： A threshold detection circuit for improving the output of a two-wire transmitter is disclosed. The transmitter comprises a sensing means which has a sensor responsive to a parameter to be sensed by the transmitter and an excitation means which provides an excitation output to excite the sensor. A threshold detection circuit is coupled to the sensor output and provides a detector output representative of an undesired change in excitation output which can produce a sensor output not substantially representative of the sensed parameter. An output means is coupled to the sensor output and detector output and provides the transmitter output as a function of the sensor output and detector output. A distinctive transmitter output representative of an undesired change in excitation output thus detected is provided, thereby improving the transmitter output.

    摘要翻译： 公开了一种用于改善双线发射机的输出的阈值检测电路。 发射机包括感测装置，其具有响应于由发射机感测的参数的传感器以及提供激励输出以激励传感器的激励装置。 阈值检测电路耦合到传感器输出，并提供代表激励输出的不期望变化的检测器输出，其可以产生基本上不代表感测参数的传感器输出。 输出装置耦合到传感器输出和检测器输出，并且作为传感器输出和检测器输出的函数提供发射器输出。 提供代表如此检测的激励输出的不期望的变化的独特的发射机输出，从而改善发射机的输出。

    Two-wire process control loop diagnostics
    10.
    发明授权
    Two-wire process control loop diagnostics 有权
    两线过程控制回路诊断

    公开(公告)号：US07321846B1

    公开(公告)日：2008-01-22

    申请号：US11543349

    申请日：2006-10-05

    申请人： Garrie D. Huisenga ,  Randy J. Longsdorf ,  Donald R. Lattimer

    发明人： Garrie D. Huisenga ,  Randy J. Longsdorf ,  Donald R. Lattimer

    IPC分类号： G06F11/00 ,  G06F11/30

    CPC分类号： H04L1/24

    摘要： A diagnostic device for coupling to a process control loop includes digital communication circuitry configured to receive a digital communication signal from the process control loop. The digital communication signal is a digitally modulated analog signal on the process control loop which is modulated to a plurality of discrete analog signal levels representative of digital values. Diagnostic circuitry diagnoses operation of the process control loop which may include field devices of the process control loop based upon the digitally modulated analog signal.

    摘要翻译： 用于耦合到过程控制回路的诊断装置包括被配置为从过程控制回路接收数字通信信号的数字通信电路。 数字通信信号是过程控制回路上的数字调制模拟信号，其被调制到表示数字值的多个离散模拟信号电平。 诊断电路诊断过程控制回路的操作，其可以包括基于数字调制模拟信号的过程控制回路的现场设备。