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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：US5495768A
公开(公告)日：1996-03-05
申请号：US277710
申请日：1994-07-20
CPC分类号： G01L19/0046 , G01L19/0645 , G01L19/086
摘要： An isolator diaphragm is formed and connected to a support member so it will withstand periodic high pressure cleaning. Such periodic cleaning includes use of heated, concentrated cleaning solutions flowing under high pressure from a nozzle which moves rapidly over segments of an exposed surface of the isolator diaphragm. The present invention prevents isolator diaphragm failure precipitated by the substantially incompressible isolator fluid driven toward the perimeter of the diaphragm during cleaning operations. Such cleaning operations generate a separating force between the isolator diaphragm and diaphragm support. The isolator diaphragm has a peripheral wall portion bonded to a planar support surface and is formed to have an offset center region. The peripheral wall and center region are joined by a conical, inclined wall bounding the center portion. The support member has a correspondingly shaped recess with an inclined annular wall that supports the conical wall of the diaphragm. The primary diaphragm flexure point of the center portion of the diaphragm is moved away from the perimeter of the diaphragm, to adjacent the junction of the inclined wall and the center region. The bonding area is not subjected to a high separating force due to the movement in the incompressible fill fluid to a localized region of the diaphragm adjacent a seal or junction line.
摘要翻译： 隔离膜隔膜形成并连接到支撑件上，从而能够承受周期性的高压清洗。 这种定期清洁包括使用在高压下流动的加热浓缩的清洁溶液，该清洁溶液快速移动到隔离隔膜的暴露表面的段上。 本发明防止在清洁操作期间由隔膜隔膜驱动的基本上不可压缩的隔离器流体沉积的隔离膜隔膜故障。 这种清洁操作在隔离膜和隔膜支撑件之间产生分离力。 隔离膜具有结合到平面支撑表面的周壁部分，并且形成为具有偏移中心区域。 周边壁和中心区域通过围绕中心部分的锥形倾斜壁连接。 支撑构件具有相应形状的凹部，其具有支撑隔膜的锥形壁的倾斜环形壁。 隔膜中心部分的主要隔膜弯曲点远离隔膜的周边移动到靠近倾斜壁和中心区域的接合处。 由于在不可压缩的填充流体中移动到邻近密封或连接线的隔膜的局部区域，接合区域不会受到高的分离力。
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公开(公告)号：USD358782S
公开(公告)日：1995-05-30
申请号：US13150
申请日：1993-09-20
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公开(公告)号：US20080245152A1
公开(公告)日：2008-10-09
申请号：US11697399
申请日：2007-04-06
IPC分类号： G01L7/00
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：US20080087335A1
公开(公告)日：2008-04-17
申请号：US11580512
申请日：2006-10-13
IPC分类号： F16K37/00
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：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：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。
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公开(公告)号：US5157972A
公开(公告)日：1992-10-27
申请号：US677309
申请日：1991-03-29
CPC分类号： G01L9/0073 , Y10T29/43
摘要： A metal thin film bonds a semiconductor bonding region of a diaphragm layer to a ceramic bonding region of a high modulus support block. The arrangement isolates a pressure sensing diaphragm from undesired strain, improving sensor accuracy. A passageway through the support block couples the fluid pressure to the sensing diaphragm to deflect it. Capacitive coupling between the diaphragm and a capacitor plate on the support block sense the deflection and provide an output representative of pressure.
摘要翻译： 金属薄膜将隔膜层的半导体接合区域结合到高模量支撑块的陶瓷接合区域。 该装置将压力感测隔膜与不期望的应变隔离，从而提高传感器精度。 通过支撑块的通道将流体压力耦合到感测膜片以使其偏转。 隔膜和支撑块上的电容器板之间的电容耦合感测偏转并提供代表压力的输出。
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