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公开(公告)号：US5760310A
公开(公告)日：1998-06-02
申请号：US770916
申请日：1996-12-20
CPC分类号： G01L19/0672 , G01L19/0092 , G01L19/0645 , G01M3/16
摘要： A pressure transmitter has a pressure sensor coupled to an isolator diaphragm by a fill fluid such as oil. According to the invention, means are provided for measuring the position of the isolator diaphragm and comparing the measured position with an expected position to give an indication of fill fluid leakage. Non-contact arrangements such as capacitive and ultrasonic techniques are disclosed for measuring isolator diaphragm position, as well as contacting arrangements such as switches. The fill fluid loss arrangement can be incorporated into a two-wire transmitter, which transmitter can be made to send a warning signal to a control unit when fill fluid loss is detected.
摘要翻译： 压力变送器具有通过诸如油的填充液体耦合到隔离膜的压力传感器。 根据本发明，提供了用于测量隔离膜片的位置并将测量位置与预期位置进行比较的装置，以给出填充流体泄漏的指示。 公开了诸如电容和超声波技术的非接触布置用于测量隔离膜的位置以及诸如开关的接触布置。 填充流体损失布置可以并入双线式发射器中，当检测到填充液体损失时，该发射器可以被发送给控制单元的警告信号。
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公开(公告)号：US06662662B1
公开(公告)日：2003-12-16
申请号：US09564506
申请日：2000-05-04
申请人： Christina A. Nord , David A. Horky , Kenneth G. Guttsen , Thomas E. Johnson , Matthew G. Sherin , Kevin P. Szafranski , William J. Ballot , Renae M. Patrick , Donald E. Harasyn , Ryan R. Eidenschink , Todd W. Schansberg , Mark G. Romo , Steven M. Behm , Bennett L. Louwagie , Robert C. Hedtke , Stanley E. Rud, Jr. , Jeffrey C. Brekken
发明人： Christina A. Nord , David A. Horky , Kenneth G. Guttsen , Thomas E. Johnson , Matthew G. Sherin , Kevin P. Szafranski , William J. Ballot , Renae M. Patrick , Donald E. Harasyn , Ryan R. Eidenschink , Todd W. Schansberg , Mark G. Romo , Steven M. Behm , Bennett L. Louwagie , Robert C. Hedtke , Stanley E. Rud, Jr. , Jeffrey C. Brekken
IPC分类号： G01L708
CPC分类号： G01L19/0645 , G01L19/0618 , G01L19/0663
摘要： A pressure transmitter with a fluid isolator that includes a sensor tube and a fill tube that have “D” shaped ends that connect together in a port internal to the transmitter. The shaped ends can be brazed into the port for sealing. Fitting both the sensor tube and the fill tube in the same port provides a low cost isolator with reduced isolator liquid volume. The fluid isolator has an isolator diaphragm with a central diaphragm region overlying a central backing plate that includes a annular groove. The annular groove avoids slow response of the isolator after an overpressure condition.
摘要翻译： 具有流体隔离器的压力变送器，其包括传感器管和填充管，其具有在发射器内部的端口中连接在一起的“D”形端。 成型端可以钎焊到端口中进行密封。 将传感器管和填充管同时连接在同一个端口，可提供低成本的隔离器，减少隔离液体积。 流体隔离器具有隔离隔膜，隔膜隔膜具有覆盖中心背板的中心隔膜区域，该中心隔板包括环形槽。 环形槽避免了超压条件下隔离器的响应缓慢。
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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。
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公开(公告)号：US5650777A
公开(公告)日：1997-07-22
申请号：US479801
申请日：1995-06-07
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。
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5.发明授权Transmitter having input for receiving a process variable from a remote sensor 失效具有用于从远程传感器接收过程变量的输入的变送器
公开(公告)号：US5606513A
公开(公告)日：1997-02-25
申请号：US258262
申请日：1994-06-09
申请人： Bennett L. Louwagie , Gregory S. Munson , David E. Wiklund , Michael J. Zweber , David A. Broden , Brian J. Bischoff , Gary P. Corpron
发明人： Bennett L. Louwagie , Gregory S. Munson , David E. Wiklund , Michael J. Zweber , David A. Broden , Brian J. Bischoff , Gary P. Corpron
IPC分类号： G01F1/36 , G01F1/88 , G01F15/06 , G01F23/14 , G01F23/18 , G01L7/08 , G01L9/04 , G01L19/00 , G01L19/08 , G01C25/00
CPC分类号： G01F23/18 , G01F1/363 , G01F1/50 , G01F1/88 , G01F15/063 , G01L19/0007 , G01L19/0015 , G01L19/083 , G01L9/045
摘要： A two-wire transmitter senses a pressure using an internal pressure sensor. The transmitter includes an input for receiving a process variable from a remote sensor which is separated from the transmitter. Circuitry in the transmitters transmits information on a two-wire process control loop which is related to the sensed pressure and the process variable.
摘要翻译： 双线变送器使用内部压力传感器感测压力。 发射机包括用于接收来自与发射机分离的远程传感器的过程变量的输入。 发射机中的电路在与感测的压力和过程变量相关的两线过程控制回路上发送信息。
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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
CPC分类号： F16K1/04 , F16K24/04 , G01L19/0015 , Y10T137/8326 , Y10T137/87249 , Y10T137/87885
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。
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公开(公告)号：US06082199A
公开(公告)日：2000-07-04
申请号：US277249
申请日：1999-03-26
CPC分类号： G01L9/0075 , G01L9/125 , Y10T29/49142
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。
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公开(公告)号：US6079276A
公开(公告)日：2000-06-27
申请号：US345165
申请日：1999-06-30
CPC分类号： G01L9/0075 , G01L9/125 , Y10T29/49142
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。
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公开(公告)号：US5899962A
公开(公告)日：1999-05-04
申请号：US792298
申请日：1997-01-31
申请人： Bennett L. Louwagie , Gregory S. Munson , David E. Wiklund , Michael J. Zweber , David A. Broden , Brian J. Bischoff , Gary P. Corpron
发明人： Bennett L. Louwagie , Gregory S. Munson , David E. Wiklund , Michael J. Zweber , David A. Broden , Brian J. Bischoff , Gary P. Corpron
IPC分类号： G01F1/36 , G01F1/88 , G01F15/06 , G01F23/14 , G01F23/18 , G01L7/08 , G01L9/04 , G01L19/00 , G01L19/08 , G01C25/00
CPC分类号： G01F23/18 , G01F1/363 , G01F1/50 , G01F1/88 , G01F15/063 , G01L19/0007 , G01L19/0015 , G01L19/083 , G01L9/045
摘要： A two-wire transmitter senses differential pressure, absolute pressure, and process temperature of a process fluid. The information can be used to provide an output representative of mass flow through a pipe. The transmitter has an electronics module housing attached to a sensor module housing. The sensor module housing contains all the sensors for the pressures and includes a boss input for receiving a signal representative of a temperature or pressure signal. The three process variables are appropriately digitized, and received by an electronics circuit board in the electronics housing including a microprocessor for calculating the mass flow. The microprocessor in the electronics housing also calculates a compressibility factor and a discharge coefficients according to a polynomials of specific forms. The boss is integral to the sensor module housing and is adapted to fit either shielded twisted pair cabling or conduit.
摘要翻译： 双线变送器感应过程流体的差压，绝对压力和过程温度。 该信息可用于提供代表通过管道的质量流量的输出。 变送器具有连接到传感器模块外壳的电子模块外壳。 传感器模块壳体包含用于压力的所有传感器，并且包括用于接收代表温度或压力信号的信号的凸台输入。 三个过程变量被适当地数字化，并由包括用于计算质量流量的微处理器的电子设备外壳中的电子电路板接收。 电子壳体中的微处理器还根据特定形式的多项式计算压缩系数和放电系数。 凸台是传感器模块外壳的一部分，适用于屏蔽双绞线电缆或导线。
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公开(公告)号：US6089097A
公开(公告)日：2000-07-18
申请号：US807999
申请日：1997-03-03
CPC分类号： G01L9/0075 , G01L9/125 , Y10T29/49142
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。
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