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公开(公告)号：EP0830646A1
公开(公告)日：1998-03-25
申请号：EP96920591.0
申请日：1996-05-31
申请人： ROSEMOUNT INC.
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 (40) for use in a process control system (10) is adapted for coupling to a primary process control loop (26). Digital receiver circuitry (46, 52) in the conversion circuitry (40) receives a digital signal transmitted over the primary process control loop (26) from a field transmitter (22) and responsively provides a digital output. A microprocessor (50) receives the digital output and responsively provides a secondary loop control output. Secondary loop control circuitry (62) for coupling to a secondary process control loop (58) receives the secondary loop control output from the microprocessor (50) and responsively controls current flowing through the secondary process control loop (58). The current flowing through the secondary process control loop (58) is related to the digital signal transmitted by the field transmitter (22).
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公开(公告)号：EP0720732B1
公开(公告)日：1999-09-22
申请号：EP94924070.9
申请日：1994-07-29
申请人： ROSEMOUNT INC.
发明人： LOUWAGIE, Bennett, L. , MUNSON, Gregory, S. , WIKLUND, David, E. , ZWEBER, Michael, J. , BRODEN, David, A. , BISCHOFF, Brian, J. , CORPRON, Gary, P.
CPC分类号： G01F23/18 , G01F1/363 , G01F1/50 , G01F1/88 , G01F15/063 , G01L9/045 , G01L19/0007 , G01L19/0015 , G01L19/083
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公开(公告)号：EP0720732A1
公开(公告)日：1996-07-10
申请号：EP94924070.0
申请日：1994-07-29
申请人： ROSEMOUNT INC.
发明人： LOUWAGIE, Bennett, L. , MUNSON, Gregory, S. , WIKLUND, David, E. , ZWEBER, Michael, J. , BRODEN, David, A. , BISCHOFF, Brian, J. , CORPRON, Gary, P.
CPC分类号： G01F23/18 , G01F1/363 , G01F1/50 , G01F1/88 , G01F15/063 , G01L9/045 , G01L19/0007 , G01L19/0015 , G01L19/083
摘要： A two-wire transmitter (2) 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 (4). The transmitter (2) has an electronics module housing (14) attached to a sensor module housing (16).
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公开(公告)号：EP2150789B1
公开(公告)日：2016-02-10
申请号：EP08742518.7
申请日：2008-04-03
申请人： Rosemount, Inc.
CPC分类号： G01L19/04 , G01L19/0645
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公开(公告)号：EP0695418B1
公开(公告)日：1998-12-30
申请号：EP94914136.0
申请日：1994-04-12
申请人： ROSEMOUNT INC.
CPC分类号： G01L19/0046 , G01L19/0645 , G01L19/086
摘要： An isolator diaphragm (13) is formed and connected to a support member (16A) so it will withstand periodic high pressure cleaning. The isolator diaphragm (13) has a peripheral wall portion bonded to a planar support (26) surface and is formed to have a center region (38). The peripheral wall and center region (38) are joined by a conical, inclined wall (28) bounding the center region (38). The support member (16A) has a correspondingly shaped recess (32) with an inclined annular wall (30) that supports the conical wall (28) of the diaphragm. The primary diaphragm flexure point of the center portion (38) of the diaphragm (13) is moved away from the perimeter of the diaphragm, to adjacent the junction of the inclined wall (28) and the center region (38).
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公开(公告)号：EP0577720A1
公开(公告)日：1994-01-12
申请号：EP92909243.0
申请日：1992-03-24
申请人： ROSEMOUNT INC.
CPC分类号： G01L9/0073 , Y10T29/43
摘要： Couche mince métallique (58) liant la surface de liaison à semiconducteurs (54, 56) d'une couche diaphragme (50) à la surface de liaison en céramique (44) d'un bloc support à module élevé (40). Cet agencement protège un diaphragme capteur de pression (60) des contraintes indésirables et en améliore la précision. Un passage (48) traversant le bloc support (40) couple la pression fluidique au diaphragme capteur (60) pour le faire dévier. Un couplage capacitif entre le diaphragme (60) et une plaque de condensateur (47) sur le bloc support (40) détecte la déviation et produit un signal de sortie représentant la pression.
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公开(公告)号：EP2150789A1
公开(公告)日：2010-02-10
申请号：EP08742518.7
申请日：2008-04-03
申请人： Rosemount, Inc.
CPC分类号： G01L19/04 , G01L19/0645
摘要： A pressure monitoring system (200) provides a pressure sensor (214) and a body that has a first coefficient of thermal expansion and includes at least one opening (226) for accessing a process fluid. At least one isolation diaphragm (230) is coupled to the body and positioned in the at least one opening (226). The at least one isolation diaphragm (230) has a first surface in communication with the process fluid. At least one passageway (222) 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 (222) is positioned between the first isolation diaphragm (230) and the pressure sensor (214). At least one expansion chamber (242) is coupled to the first passageway and includes an insert (246) 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 (246).
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公开(公告)号：EP0830646B1
公开(公告)日：2001-10-24
申请号：EP96920591.3
申请日：1996-05-31
申请人： ROSEMOUNT INC.
IPC分类号： G05B19/042 , G05B19/418
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 (40) for use in a process control system (10) is adapted for coupling to a primary process control loop (26). Digital receiver circuitry (46, 52) in the conversion circuitry (40) receives a digital signal transmitted over the primary process control loop (26) from a field transmitter (22) and responsively provides a digital output. A microprocessor (50) receives the digital output and responsively provides a secondary loop control output. Secondary loop control circuitry (62) for coupling to a secondary process control loop (58) receives the secondary loop control output from the microprocessor (50) and responsively controls current flowing through the secondary process control loop (58). The current flowing through the secondary process control loop (58) is related to the digital signal transmitted by the field transmitter (22).
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公开(公告)号：EP0577720B1
公开(公告)日：1996-10-30
申请号：EP92909243.5
申请日：1992-03-24
申请人： ROSEMOUNT INC.
CPC分类号： G01L9/0073 , Y10T29/43
摘要： A metal thin film (58) bonds a semiconductor bonding region (54, 56) of a diaphragm layer (50) to a ceramic bonding region (44) of a high modulus support block (40). The arrangement isolates a pressure sensing diaphragm (60) from undesired strain, improving sensor accuracy. A passageway (48) through the support block (40) couples the fluid pressure to the sensing diaphragm (60) to deflect it. Capacitive coupling between the diaphragm (60) and a capacitor plate (47) on the support block (40) sense the deflection and provide an output representative of pressure.
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公开(公告)号：EP0695418A1
公开(公告)日：1996-02-07
申请号：EP94914136.0
申请日：1994-04-12
申请人： ROSEMOUNT INC.
CPC分类号： G01L19/0046 , G01L19/0645 , G01L19/086
摘要： An isolator diaphragm (13) is formed and connected to a support member (16A) so it will withstand periodic high pressure cleaning. The isolator diaphragm (13) has a peripheral wall portion bonded to a planar support (26) surface and is formed to have a center region (38). The peripheral wall and center region (38) are joined by a conical, inclined wall (28) bounding the center region (38). The support member (16A) has a correspondingly shaped recess (32) with an inclined annular wall (30) that supports the conical wall (28) of the diaphragm. The primary diaphragm flexure point of the center portion (38) of the diaphragm (13) is moved away from the perimeter of the diaphragm, to adjacent the junction of the inclined wall (28) and the center region (38).
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