公开(公告)号：HU9401103D0

公开(公告)日：1994-08-29

申请号：HU9401103

申请日：1992-10-13

Applicant: ROSEMOUNT INC

Inventor： SCHULTE JOHN P ,  LOFGREN LYLE E ,  SEEMAN BRIAN

IPC: G01D5/24 ,  G01L9/12 ,  G01L13/06 ,  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：NO941362A

公开(公告)日：1994-06-08

申请号：NO941362

申请日：1994-04-15

Applicant: ROSEMOUNT INC

Inventor： LOFGREN LYLE E ,  SCHULTE JOHN P ,  SEEMAN BRIAN

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

CPC classification number: G01L9/125

公开(公告)号：NO941362D0

公开(公告)日：1994-04-15

申请号：NO941362

申请日：1994-04-15

Applicant: ROSEMOUNT INC

Inventor： LOFGREN LYLE E ,  SCHULTE JOHN P ,  SEEMAN BRIAN

IPC: G01L9/12 ,  G01D5/24 ,  G01L13/06 ,  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：AT87747T

公开(公告)日：1993-04-15

申请号：AT87903103

申请日：1987-04-16

Applicant: ROSEMOUNT INC

Inventor： FRICK ROGER L ,  SCHULTE JOHN P

IPC: G01L9/12 ,  G01R20060101 ,  G01R11/52 ,  G01R27/26 ,  G01R29/24

Abstract: A measurement circuit (10) provides an output signal as a function of an input signal. The measurement circuit includes a charge generator (18) which provides packets of charge as a function of the input signal to a measurement element (34). The measurement element (34) measures the charge provided and provides a measurement signal as a function of the charge received. The measurement signal (28) is coupled to a feedback circuit (9) which couples to switches in the charge generator (18) to control production of charge packets. The feedback circuit (9) provides at least one output signal indicative of the quantity or number of charge packets provided.

公开(公告)号：AU604741B2

公开(公告)日：1991-01-03

申请号：AU7705087

申请日：1987-07-14

Applicant: ROSEMOUNT INC

Inventor： FRICK ROGER L ,  SCHULTE JOHN P

IPC: G01L9/12 ,  G01D5/12 ,  G01D5/24 ,  G01R27/26 ,  G01R27/02

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：ES2005176A6

公开(公告)日：1989-03-01

申请号：ES8701151

申请日：1987-04-21

Applicant: ROSEMOUNT INC

Inventor： FRICK ROGER L ,  SCHULTE JOHN P

IPC: G01L9/12 ,  G01R20060101 ,  G01R11/52 ,  G01R27/26 ,  G01R29/24

Abstract: UN CIRCUITO DE MEDICION PARA PROPORCIONAR UNA SALIDA EN FUNCION DE UNA SEÑAL DE ENTRADA, QUE COMPRENDE UN GENERADOR DE CARGA ACOPLADO A LA SEÑAL DE ENTRADA Y DOTADO DE UNA REACTANCIA PARA PROPORCIONAR PAQUETES DE CARGA EN FUNCION DE LA SEÑAL DE ENTRADA, UN ELEMENTO DE MEDICION ACOPLADO AL GENERADOR PARA MEDIR LA SEÑAL DE ESTE EN FUNCION DE LA REACTANCIA Y PROPORCIONAR UNA SEÑAL DE MEDICION EN FUNCION DE LA CARGA RECIBIDA, Y UN CIRCUITO DE REALIMENTACION ACOPLADO AL ELEMENTO DE MEDICION PARA PROPORCIONAR AL GENERADOR UNA SEÑAL DE REALIMENTACION EN FUNCION DE LA SEÑAL DE MEDICION Y SUMINISTRAR UNA SEÑAL DE SALIDA REPRESENTATIVA DE LA CANTIDAD DE PAQUETES DE CARGA. EL INVENTO ES UTIL PARA MEDIR POTENCIALES, CORRIENTES ELECTRICAS, PRESIONES, TEMPERATURAS, CAUDALES, VALORES DE PH Y OTRAS VARIABLES.

公开(公告)号：ZA872875B

公开(公告)日：1988-04-27

申请号：ZA872875

申请日：1987-04-23

Applicant: ROSEMOUNT INC

Inventor： FRICK ROGER L ,  ROGER L FRICK ,  SCHULTE JOHN P ,  JOHN P SCHULTE

IPC: G01L9/12 ,  G01R20060101 ,  G01R11/52 ,  G01R27/26 ,  G01R29/24 ,  G08C

Abstract: A measurement circuit (10) provides an output signal as a function of an input signal. The measurement circuit includes a charge generator (18) which provides packets of charge as a function of the input signal to a measurement element (34). The measurement element (34) measures the charge provided and provides a measurement signal as a function of the charge received. The measurement signal (28) is coupled to a feedback circuit (9) which couples to switches in the charge generator (18) to control production of charge packets. The feedback circuit (9) provides at least one output signal indicative of the quantity or number of charge packets provided.

公开(公告)号：BR0014359A

公开(公告)日：2002-06-11

申请号：BR0014359

申请日：2000-09-27

Applicant: ROSEMOUNT INC

Inventor： BEHM STEVEN M ,  DAVIS DALE S ,  FANDREY MARK C ,  FRICK ROGER L ,  HEDTKE ROBERT C ,  NELSON RICHARD L ,  NELSON SCOTT D ,  ROPER WESTON ,  SCHNAARE THEODORE H ,  SCHULTE JOHN P ,  SCHUMACHER MARK S

IPC: G01L19/14 ,  G01D1/00 ,  G01L9/00 ,  H01R29/00 ,  H01R31/06 ,  H05K7/00 ,  G01L19/08

公开(公告)号：AU7835000A

公开(公告)日：2001-04-30

申请号：AU7835000

申请日：2000-09-27

Applicant: ROSEMOUNT INC

Inventor： BEHM STEVEN M ,  DAVIS DALE S ,  FANDREY MARK C ,  FRICK ROGER L ,  HEDTKE ROBERT C ,  NELSON RICHARD L ,  NELSON SCOTT D ,  ROPER WESTON ,  SCHNAARE THEODORE H ,  SCHULTE JOHN P ,  SCHUMACHER MARK S

IPC: G01L19/14 ,  G01D1/00 ,  G01L9/00 ,  H01R29/00 ,  H01R31/06 ,  H05K7/00 ,  G01L19/08

公开(公告)号：DK172364B1

公开(公告)日：1998-04-14

申请号：DK683887

申请日：1987-12-23

Applicant: ROSEMOUNT INC

Inventor： FRICK ROGER L ,  SCHULTE JOHN P

IPC: G01L9/12 ,  G01R20060101 ,  G01R11/52 ,  G01R27/26 ,  G01R29/24

Abstract: A measurement circuit (10) provides an output signal as a function of an input signal. The measurement circuit includes a charge generator (18) which provides packets of charge as a function of the input signal to a measurement element (34). The measurement element (34) measures the charge provided and provides a measurement signal as a function of the charge received. The measurement signal (28) is coupled to a feedback circuit (9) which couples to switches in the charge generator (18) to control production of charge packets. The feedback circuit (9) provides at least one output signal indicative of the quantity or number of charge packets provided.