Pressure sensor cavity etched with hot POCL.sub.3 gas
    1.
    发明授权
    Pressure sensor cavity etched with hot POCL.sub.3 gas 有权
    用热POCL3气体蚀刻压力传感器腔

    公开(公告)号:US06082199A

    公开(公告)日:2000-07-04

    申请号:US277249

    申请日:1999-03-26

    IPC分类号: G01L9/00 G01L9/12 G01L13/06

    摘要: 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.

    摘要翻译: 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。

    Sintered pressure sensor for a pressure transmitter
    2.
    发明授权
    Sintered pressure sensor for a pressure transmitter 有权
    用于压力变送器的烧结压力传感器

    公开(公告)号:US6079276A

    公开(公告)日:2000-06-27

    申请号:US345165

    申请日:1999-06-30

    IPC分类号: G01L9/00 G01L9/12 G01L13/06

    摘要: 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 control's 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.

    摘要翻译: 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。 补偿电路接收压力相关信号,并响应控制I / O电路传输环路上的压力信息。 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。

    Elongated pressure sensor for a pressure transmitter
    3.
    发明授权
    Elongated pressure sensor for a pressure transmitter 失效
    用于压力变送器的细长压力传感器

    公开(公告)号:US6089097A

    公开(公告)日:2000-07-18

    申请号:US807999

    申请日:1997-03-03

    IPC分类号: G01L9/00 G01L9/12 G01L13/06

    摘要: 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.

    摘要翻译: 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。

    Capacitive pressure sensor for a pressure transmitted where electric
field emanates substantially from back sides of plates
    4.
    发明授权
    Capacitive pressure sensor for a pressure transmitted where electric field emanates substantially from back sides of plates 失效
    用于压力变送器的电容式压力传感器,其中电场基本上从板的背面发出

    公开(公告)号:US5637802A

    公开(公告)日:1997-06-10

    申请号:US395778

    申请日:1995-02-28

    IPC分类号: G01L9/00 G01L9/12 G01L13/06

    摘要: 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.

    摘要翻译: 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。

    Expansion chamber for use with a pressure transmitter
    5.
    发明授权
    Expansion chamber for use with a pressure transmitter 有权
    膨胀室,用于压力变送器

    公开(公告)号:US07454975B2

    公开(公告)日:2008-11-25

    申请号:US11697399

    申请日:2007-04-06

    IPC分类号: G01L7/08

    CPC分类号: G01L19/04 G01L19/0645

    摘要: A pressure monitoring system provides a pressure sensor and a body that has a first coefficient of thermal expansion and includes at least one opening for accessing a process fluid. At least one isolation diaphragm is coupled to the body and positioned in the at least one opening. The at least one isolation diaphragm has a first surface in communication with the process fluid. At least one passageway is located in the body and configured to contain a fill fluid in communication with a second surface of the first isolation diaphragm. The at least one passageway is positioned between the first isolation diaphragm and the pressure sensor. At least one expansion chamber is coupled to the first passageway and includes an insert having a second coefficient of thermal expansion. The first coefficient of thermal expansion of the body is greater than the second coefficient of thermal expansion of the insert.

    摘要翻译: 压力监测系统提供压力传感器和具有第一热膨胀系数的主体,并且包括至少一个用于进入工艺流体的开口。 至少一个隔离隔膜联接到主体并且定位在至少一个开口中。 所述至少一个隔离隔膜具有与所述工艺流体连通的第一表面。 至少一个通道位于主体中并且构造成容纳与第一隔离隔膜的第二表面连通的填充流体。 至少一个通道位于第一隔离隔膜和压力传感器之间。 至少一个膨胀室联接到第一通道并且包括具有第二热膨胀系数的插入件。 身体的第一热膨胀系数大于插入件的第二热膨胀系数。

    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

    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 pressure measurement system with improved venting
    8.
    发明授权
    Process pressure measurement system with improved venting 有权
    过程压力测量系统具有改进的排气

    公开(公告)号:US07721764B2

    公开(公告)日:2010-05-25

    申请号:US11580512

    申请日:2006-10-13

    IPC分类号: F17D1/00

    摘要: A process fluid pressure measurement system includes a process fluid pressure transmitter coupled to a coplanar manifold. The coplanar manifold includes a first bore coupleable to a source of process fluid, and a vent passageway connected to the first bore and terminating in a vent hole. The coplanar manifold includes at least one port configured to receive a valve stem. Directly engaging the valve stem with the coplanar manifold selectively vents the coplanar manifold. Aspects of the present invention also include a coplanar manifold for coupling fluid to a process fluid pressure transmitter, and a method of venting such a coplanar manifold.

    摘要翻译: 过程流体压力测量系统包括耦合到共面歧管的过程流体压力变送器。 共面歧管包括可连接到过程流体源的第一孔和连接到第一孔并且终止于通气孔中的通气通道。 共面歧管包括构造成接收阀杆的至少一个端口。 直接接合阀杆与共面歧管选择性地排出共面歧管。 本发明的方面还包括用于将流体耦合到过程流体压力变送器的共面歧管以及排放这种共面歧管的方法。