公开(公告)号：DE69229871D1

公开(公告)日：1999-09-30

申请号：DE69229871

申请日：1992-10-13

Applicant: ROSEMOUNT INC

Inventor： LOFGREN LYLE ,  SCHULTE JOHN ,  SEEMAN BRIAN

IPC: G01L9/12 ,  G01L13/06 ,  G01D5/24 ,  G01R27/26 ,  G01R27/28

Abstract: A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having a compensation capacitance MACDA or a digital removable module having compensation capacitance CDD. Capacitance compensation circuitry is included in the fixed module which includes a compensation capacitance CDM which is selected whereby MACDA equals CDD when the analog removable module and the digital removable module are calibrated. This provides a pressure transfer function which is more linearized and less susceptible to temperature variations.

公开(公告)号：DE3751008T2

公开(公告)日：1995-05-18

申请号：DE3751008

申请日：1987-07-14

Applicant: ROSEMOUNT INC

Inventor： FRICK ROGER ,  SCHULTE JOHN

IPC: G01L9/12 ,  G01D5/12 ,  G01D5/24 ,  G01R27/26

Abstract: A transmitter provides an output representative of a parameter. A generating circuit in the transmitter senses the parameter and provides charge packets having adjustable magnitudes to a measurement circuit. The measurement circuit measures the quantity of charge and provides a measurement signal representing the charge to a feedback circuit. The feedback circuit is controlled by the measurement signal and provides timed feedback signals to the generating means. The feedback signals control the generation and magnitude of the charge packets such that the charge coupled to the measurement circuit is finely balanced in a short measurement interval. The feedback means counts the number of charge packets provided during a measurement interval such that the numbers counted are representative of the sensed parameter.

公开(公告)号：DE3751008D1

公开(公告)日：1995-03-02

申请号：DE3751008

申请日：1987-07-14

Applicant: ROSEMOUNT INC

Inventor： FRICK ROGER ,  SCHULTE JOHN

IPC: G01L9/12 ,  G01D5/12 ,  G01D5/24 ,  G01R27/26

Abstract: A transmitter provides an output representative of a parameter. A generating circuit in the transmitter senses the parameter and provides charge packets having adjustable magnitudes to a measurement circuit. The measurement circuit measures the quantity of charge and provides a measurement signal representing the charge to a feedback circuit. The feedback circuit is controlled by the measurement signal and provides timed feedback signals to the generating means. The feedback signals control the generation and magnitude of the charge packets such that the charge coupled to the measurement circuit is finely balanced in a short measurement interval. The feedback means counts the number of charge packets provided during a measurement interval such that the numbers counted are representative of the sensed parameter.

公开(公告)号：RU2649032C1

公开(公告)日：2018-03-29

申请号：RU2016151861

申请日：2012-06-14

Applicant: ROSEMOUNT INC

Inventor： HEDTKE ROBERT C ,  SCHULTE JOHN ,  BRODEN DAVID A

IPC: G01L7/08

Abstract: Передающийдатчикдавлениятехнологическойтекучейсредыимеетудаленныйдатчик (204) давления. Передающийдатчиквключаетв себякорпус (104) подэлектроникуи коммуникатор (300) контура, расположенныйв корпусе (104) подэлектроникуи конфигурируемый, чтобыпередаватьданныев соответствиис протоколомсвязипроцесса. Контроллер (304) располагаетсяв корпусе (104) подэлектроникуи соединяетсяс коммуникатором (300) контура. Измерительнаясхема (306) датчикарасполагаетсяв корпусе (104) подэлектроникуи соединяетсяс контроллером (300). Корпусудаленногодатчикадавленияконфигурируется, чтобысоединятьсянепосредственнос процессом, ирасполагаетсянарасстоянииоткорпусаподэлектронику. Датчик (100, 120) давлениярасполагаетсяв корпусеудаленногодатчикадавления. Датчик (100, 120) давленияформируетпоменьшеймереодинэлектрическийкомпонент, имеющийэлектрическуюхарактеристику, котораяизменяетсяс давлениемтехнологическойтекучейсреды. Фрагментыэлектрическогокомпонентасоединяютсянепосредственнос многожильнымкабелем (106), которыйфункциональносоединяетдатчик (100, 120) давленияс измерительнойсхемой (306) датчика. Техническийрезультат– возможностьпредоставленияпреимуществудаленнойсистемыдатчикас одновременнымуменьшениемошибкик сигналу. 20 з.п. ф-лы, 7 ил.

公开(公告)号：DE68926296T2

公开(公告)日：1996-11-21

申请号：DE68926296

申请日：1989-06-08

Applicant: ROSEMOUNT INC

Inventor： SCHULTE JOHN ,  ORTH KELLY ,  FRICK ROGER ,  WESTFIELD BRIAN ,  PASCHKE RANDY

IPC: G01D5/24 ,  G01L9/12 ,  G01R27/26

Abstract: A charge balanced feedback type transmitter generates charge packets representative of a sensed parameter. Improved performance is achieved by the additiion of resistance connected between a charge packet generating reactance and an integrator to reduce the effects of noise caused by switching transients and by ground noise which is coupled to the charge packet generating circuitry by stray capacitance. The charge packets are integrated by the integrater, and the integrator output is supplied from a selective basis to the input of a comparator. The output of the comparator is used to control the application of charge packets to the integrator to achieve charge balance. The input of the comparator is selectively connected to the output of the integrator, to a first supply voltage, or to a second supply voltage to ensure a stable output of the comparator at a critical time when charge is being supplied to the integrator.

公开(公告)号：CA2849392A1

公开(公告)日：2013-04-04

申请号：CA2849392

申请日：2012-06-14

Applicant: ROSEMOUNT INC

Inventor： HEDTKE ROBERT C ,  SCHULTE JOHN ,  BRODEN DAVID A

IPC: G01L7/08 ,  G01L19/08

Abstract: A process fluid pressure transmitter has a remote pressure sensor (204). The transmitter includes an electronics housing (104) and a loop communicator (300) disposed in the electronics housing (104) and being configured to communicate in accordance with a process communication protocol. A controller (304) is disposed within the electronics housing (104) and is coupled to the loop communicator (300). Sensor measurement circuitry (306) is disposed within the electronics housing (104) and is coupled to the controller (300). A remote pressure sensor housing is configured to couple directly to a process and is spaced from the electronics housing. A pressure sensor (100, 120) is disposed within the remote pressure sensor housing. The pressure sensor (100, 120) forms at least one electrical component having an electrical characteristic that varies with process fluid pressure. Portions of the electrical component are coupled directly to a multiconductor cable (106) that operably connects the pressure sensor (100, 120) to the sensor measurement circuitry (306).

公开(公告)号：CA2656738A1

公开(公告)日：2008-01-17

申请号：CA2656738

申请日：2007-05-02

Applicant: ROSEMOUNT INC

Inventor： ROMO MARK ,  RUD STANLEY E JR ,  SCHULTE JOHN

IPC: G01L19/00 ,  G01L27/00

Abstract: Reliability and accuracy in a pressure measurement transmitter are provid ed by employing a plurality of absolute or gauge pressure sensors (220, 222, 230, 232; 307, 301) operating in conjunction with a differential pressure s ensor. A method (400) is also provided to perform diagnostics based upon the readings of the three pressure sensors. Further, should one of the three pr essure sensors (218, 220, 222, 230, 232; 301, 307, 334) fail, a reasonable e stimate of process pressure beijig measured by the failed sensor can be gene rated based upon the remaining two sensors.

公开(公告)号：CA2849392C

公开(公告)日：2016-05-03

申请号：CA2849392

申请日：2012-06-14

Applicant: ROSEMOUNT INC

Inventor： HEDTKE ROBERT C ,  SCHULTE JOHN ,  BRODEN DAVID A

IPC: G01L7/08 ,  G01L19/08

Abstract: A process fluid pressure transmitter has a remote pressure sensor (204). The transmitter includes an electronics housing (104) and a loop communicator (300) disposed in the electronics housing (104) and being configured to communicate in accordance with a process communication protocol. A controller (304) is disposed within the electronics housing (104) and is coupled to the loop communicator (300). Sensor measurement circuitry (306) is disposed within the electronics housing (104) and is coupled to the controller (300). A remote pressure sensor housing is configured to couple directly to a process and is spaced from the electronics housing. A pressure sensor (100, 120) is disposed within the remote pressure sensor housing. The pressure sensor (100, 120) forms at least one electrical component having an electrical characteristic that varies with process fluid pressure. Portions of the electrical component are coupled directly to a multiconductor cable (106) that operably connects the pressure sensor (100, 120) to the sensor measurement circuitry (306).

公开(公告)号：DE68926296D1

公开(公告)日：1996-05-23

申请号：DE68926296

申请日：1989-06-08

Applicant: ROSEMOUNT INC

Inventor： SCHULTE JOHN ,  ORTH KELLY ,  FRICK ROGER ,  WESTFIELD BRIAN ,  PASCHKE RANDY

IPC: G01D5/24 ,  G01L9/12 ,  G01R27/26

Abstract: A charge balanced feedback type transmitter generates charge packets representative of a sensed parameter. Improved performance is achieved by the additiion of resistance connected between a charge packet generating reactance and an integrator to reduce the effects of noise caused by switching transients and by ground noise which is coupled to the charge packet generating circuitry by stray capacitance. The charge packets are integrated by the integrater, and the integrator output is supplied from a selective basis to the input of a comparator. The output of the comparator is used to control the application of charge packets to the integrator to achieve charge balance. The input of the comparator is selectively connected to the output of the integrator, to a first supply voltage, or to a second supply voltage to ensure a stable output of the comparator at a critical time when charge is being supplied to the integrator.

公开(公告)号：EP2761264A4

公开(公告)日：2015-06-24

申请号：EP12835022

申请日：2012-06-14

Applicant: ROSEMOUNT INC

Inventor： HEDTKE ROBERT C ,  SCHULTE JOHN ,  BRODEN DAVID A

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

CPC classification number: G01L19/0061 ,  G01F1/34 ,  G01F1/36 ,  G01F1/38 ,  G01F1/42 ,  G01F15/06 ,  G01F15/061 ,  G01L19/0046 ,  G01L19/0084 ,  G01L19/0681 ,  G01L19/08

Abstract: A process fluid pressure transmitter has a remote pressure sensor. The transmitter includes an electronics housing and a loop communicator disposed in the electronics housing and being configured to communicate in accordance with a process communication protocol. A controller is disposed within the electronics housing and is coupled to the loop communicator. Sensor measurement circuitry is disposed within the electronics housing and is coupled to the controller. A remote pressure sensor housing is configured to couple directly to a process and is spaced from the electronics housing. A pressure sensor is disposed within the remote pressure sensor housing. The pressure sensor forms at least one electrical component having an electrical characteristic that varies with process fluid pressure. Portions of the electrical component are coupled directly to a multiconductor cable that operably connects the pressure sensor to the sensor measurement circuitry.