公开(公告)号：EP2761264B1

公开(公告)日：2020-03-04

申请号：EP12835022.0

申请日：2012-06-14

Applicant: Rosemount Inc.

Inventor： HEDTKE, Robert, C. ,  SCHULTE, John ,  BRODEN, David, A.

IPC: G01L7/08 ,  G01L19/08 ,  G01L19/00 ,  G01F1/34 ,  G01F1/36 ,  G01F1/38 ,  G01F1/42 ,  G01F15/06 ,  G01L19/06

公开(公告)号：EP2593766B1

公开(公告)日：2018-11-14

申请号：EP11725286.6

申请日：2011-06-01

Applicant: Rosemount Inc.

Inventor： BRODEN, David, A. ,  HEDTKE, Robert, C. ,  KLOSINSKI, Andrew, J. ,  SITTLER, Fred, C.

IPC: G01L13/00 ,  G01L15/00 ,  G01L27/00

CPC classification number: G01L13/026 ,  G01F1/383 ,  G01F1/50 ,  G01L9/125 ,  G01L15/00 ,  G01L27/002 ,  G01L27/007

Abstract: A process variable transmitter for measuring a pressure of a process fluid includes a process coupling having a first port configured to couple to a first process pressure and a second port configured to couple to a second process pressure. A differential pressure sensor is coupled to the first and second ports and provides an output related to a differential pressure between the first pressure and the second pressure. First and second pressure sensors couple to the respective first and second ports and provide outputs related to the first and second pressures. Transmitter circuitry is configured to provide a transmitter output based upon the output from the differential pressure sensor and/or the first and/or second pressure sensors. Additional functionality is provided by the transmitter using the sensed first and/or second pressures.

公开(公告)号：EP2304404A1

公开(公告)日：2011-04-06

申请号：EP09763295.4

申请日：2009-06-03

Applicant: Rosemount, Inc.

Inventor： BRODEN, David, A.

IPC: G01L9/00

CPC classification number: G01L19/0046 ,  G01L19/0645

Abstract: A process fluid pressure transmitter includes a pressure sensor, transmitter electronics, and an isolation system. The pressure sensor has an electrical characteristic that changes with pressure. The transmitter electronics are coupled to the pressure sensor to sense the electrical characteristic and calculate a pressure output. The isolation system includes a base member, and isolation diaphragm, and a fill-fluid. The isolation diaphragm is mounted to the base member and interposed between the pressure sensor and a process fluid. The fill-fluid is disposed between the isolation diaphragm and the pressure sensor. The base member and the isolation diaphragm are constructed from different materials such that the coefficient of thermal expansion of the isolation diaphragm is larger than the coefficient of thermal expansion of the base member.

公开(公告)号：EP2260280A2

公开(公告)日：2010-12-15

申请号：EP09727675.2

申请日：2009-04-02

Applicant: Rosemount, Inc.

Inventor： BRODEN, David, A.

IPC: G01L9/12

CPC classification number: G01L13/025 ,  G01L19/0046

Abstract: A capacitive pressure sensor (30) for an industrial process transmitter (12) comprises a housing (62A & 62B), a sensing diaphragm (58), an electrode (60A or 60B) and a fill fluid. The housing (62A & 62B) includes an interior cavity (78) and a channel extending from an exterior of the housing (62A & 62B) to the cavity (78). The sensing diaphragm (58) is disposed within the interior cavity (78) opposite the electrode (60A or 60B). The fill fluid occupies the interior cavity (78) such that a pressure from the channel is conveyed to the sensing diaphragm (58) to adjust a capacitance between the electrode (60A or 60B) and the sensing diaphragm (58). The fill fluid has a dielectric constant higher than about 3.5. In various embodiments, the pressure sensor (30) has a diameter less than approximately 3.175 centimeters (~1.25 inches).

公开(公告)号：EP1269027B1

公开(公告)日：2005-07-27

申请号：EP01916156.1

申请日：2001-02-22

Applicant: ROSEMOUNT INC.

Inventor： WIKLUND, David, E. ,  KROUTH, Terrance, F. ,  BRODEN, David, A. ,  SCHUMACHER, Mark, S.

IPC: F15B15/28 ,  G01F1/00

CPC classification number: G01F1/50 ,  F15B15/2838 ,  G01F1/40 ,  G01F1/42 ,  G01F1/44

公开(公告)号：EP2304404B1

公开(公告)日：2019-05-01

申请号：EP09763295.4

申请日：2009-06-03

Applicant: Rosemount Inc.

Inventor： BRODEN, David, A.

IPC: G01L19/00 ,  G01L19/06

公开(公告)号：EP2002232B1

公开(公告)日：2013-05-08

申请号：EP07752663.0

申请日：2007-03-08

Applicant: Rosemount, Inc.

Inventor： BRODEN, David, A.

IPC: G01L13/02 ,  G01L19/00 ,  G01L19/04 ,  G01L19/06

CPC classification number: G01L19/0681 ,  G01L9/025 ,  G01L13/025 ,  G01L19/0046

公开(公告)号：EP1181518B1

公开(公告)日：2005-11-02

申请号：EP00928951.3

申请日：2000-05-11

Applicant: ROSEMOUNT INC.

Inventor： FRICK, Roger, L. ,  RUD, Stanley, E., Jr. ,  BRODEN, David, A.

IPC: G01L13/02 ,  G01L9/00

CPC classification number: G01L9/0075 ,  G01L9/0072 ,  G01L9/125 ,  G01L13/025

公开(公告)号：EP1436583A1

公开(公告)日：2004-07-14

申请号：EP02761800.8

申请日：2002-09-24

Applicant: ROSEMOUNT INC.

Inventor： GRAVEL, James, L. ,  SITTLER, Fred, C. ,  BRODEN, David, A.

IPC: G01L19/14

CPC classification number: G01L9/0086 ,  G01L9/0075 ,  G01L19/0084 ,  G01L19/0645 ,  G01L19/14

Abstract: A sensor capsule (20, 98, 120, 220) suitable for use in an industrial process fluid transmitter. The sensor capsule (20, 98, 120, 220) includes a block (24, 224) that has a sensor mounting hole (30, 130, 230). The block (24, 224) includes two half-blocks (26, 28; 146, 148; 226, 228) joined along mating surfaces (22, 23; 222, 223) passing lengthwise through the sensor mounting hole. A (50, 128, 250) sensor has as sensor neck (52, 252) passing through the sensor mounting hole (30, 130, 230). The sensor neck (52, 252) is sealed to the sensor mounting hole (30, 130, 230).

公开(公告)号：EP1181518A1

公开(公告)日：2002-02-27

申请号：EP00928951.3

申请日：2000-05-11

Applicant: ROSEMOUNT INC.

Inventor： FRICK, Roger, L. ,  RUD, Stanley, E., Jr. ,  BRODEN, David, A.

IPC: G01L13/02 ,  G01L9/00

CPC classification number: G01L9/0075 ,  G01L9/0072 ,  G01L9/125 ,  G01L13/025

Abstract: A device and method provide for improved error compensation in the measurement of process pressure. The device and method are able to compensate for diaphragm deformation (offset) and varying dielectric constants present in a process field environment. The pressure sensor (56), filled with a dielectric fill-fluid (95), includes at least three capacitor plates (144, 146, 148, 150), disposed about a diaphragm (102). At least two capacitor plates (144, 146) are placed on one side of a conductive diaphragm (102), and one capacitor plate (148, 150) is placed on the other side of the diaphragm (102). The method compensates for both diaphragm offset and variances in the dielectric constant of the fill-fluid (95). An error compensated measurement of differential pressure is a function of the amount of diaphragm deflection detected at the edge region (194) subtracted from the amount of diaphragm deflection detected at the center region (140). One way of measuring diaphragm deflection is to measure the changes in capacitances from two capacitors on each side of the diaphragm (102), and to combine these values to achieve an error compensated output (R) representative of the applied differential pressure.