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公开(公告)号：NO881169D0
公开(公告)日：1988-03-16
申请号：NO881169
申请日：1988-03-16
Applicant: ROSEMOUNT INC
Inventor： FRICK ROGER L , SCHULTE JOHN P
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.
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公开(公告)号：DK683887A
公开(公告)日：1987-12-23
申请号：DK683887
申请日：1987-12-23
Applicant: ROSEMOUNT INC
Inventor： FRICK ROGER L , SCHULTE JOHN P
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 is coupled 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.
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公开(公告)号：NO875401A
公开(公告)日：1987-12-22
申请号：NO875401
申请日：1987-12-22
Applicant: ROSEMOUNT INC
Inventor： FRICK ROGER L , SCHULTE JOHN P
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公开(公告)号：BR112012028543A2
公开(公告)日：2016-07-26
申请号：BR112012028543
申请日：2011-05-09
Applicant: ROSEMOUNT INC
Inventor： SCHULTE JOHN P
IPC: G05B19/042
Abstract: dispositivo de campo de processo para uso em monitoramento ou controle de um processo industrial, e, método de prover energia para um dispositivo de campo de processo. um dispositivo de campo de processo (104) para uso em monitoramento ou controle de um processo inclui primeiro e segundo terminais de laço (162, 164) configurados para acoplar um laço de controle de processo industrial de dois fios (108). os circuitos do dispositivo de campo (168) são configurados para monitorar ou controlar uma variável de processo industrial. os circuitos do dispositivo de campo (168) com fornecimento de energia por conexões de energia a partir do laço de controle de processo industrial de dois fios (108). um regulador de corrente (220) é conectado em série com o laço de controle de processo industrial de dois fios (108), o primeiro e segundo terminais de laço (162, 164) e os circuitos do dispositivo de campo (168). um regulador de voltagem (282) é conectado em paralelo com o regulador de corrente (220) e em série com o laço de controle de processo industrial de dois fios (108), o primeiro e segundo terminais de laço (162, 164) e os circuitos do dispositivo de campo (168).
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公开(公告)号：MX2012013749A
公开(公告)日：2013-02-12
申请号：MX2012013749
申请日：2011-06-01
Applicant: ROSEMOUNT INC
Inventor： KLOSINSKI ANDREW J , SCHULTE JOHN P , TYSON DAVID G
Abstract: Un ensamble de sensor presión para detectar una presión de un fluido de proceso incluye un cuerpo de sensor (56) que tiene una cavidad (132,134) formada en el mismo y primera y segunda aberturas a la cavidad configurada para aplicar primera y segunda presiones (P1, P2). Un diafragma (106) en la cavidad separa la primera abertura de la segunda abertura y está configurada para flexionarse en respuesta a una presión diferencial entre la primera presión y la segunda presión. Un sensor de deformación (59) basado en capacitancia se provee y está configurado para detectar deformación del cuerpo del sensor en respuesta a una presión de línea aplicada al cuerpo del sensor.
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Patent Agency Ranking
公开(公告)号：CA2804988A1
公开(公告)日：2011-12-15
申请号：CA2804988
申请日：2011-06-01
Applicant: ROSEMOUNT INC
Inventor： SCHULTE JOHN P , TYSON DAVID G , KLOSINSKI ANDREW J
Abstract: A pressure sensor assembly for sensing a pressure of a process fluid includes a sensor body (56) having a cavity (132, 134) formed therein and first and second openings to the cavity configured to apply first and second pressures (PI, P2). A diaphragm (106) in the cavity separates the first opening from the second opening and is configured to deflect in response to a differential pressure between the first pressure and the second pressure. A capacitance based deformation sensor (59) is provided and configured to sense deformation of the sensor body in response to a line pressure applied to the sensor body.
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27.发明专利
公开(公告)号：AU2003265312A1
公开(公告)日：2004-03-03
申请号：AU2003265312
申请日：2003-07-28
Applicant: ROSEMOUNT INC
Inventor： SCHULTE JOHN P
Abstract: A pressure measurement device that has a digital clock circuit that provides an excitation clock and a control output. An integrator includes a switch controlled by the control output, an amplifier, and a pressure sensing capacitance coupled in an amplifier feedback path. The switch connects across the first pressure sensing capacitance. A reference capacitance that is insensitive to the pressure couples between the excitation clock and the amplifier input. An amplifier output represents the pressure.
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公开(公告)号：BR9610644A
公开(公告)日：1999-05-18
申请号：BR9610644
申请日：1996-09-13
Applicant: ROSEMOUNT INC
Inventor： FRICK ROGER L , SCHULTE JOHN P , TEWFIK AHMED H
Abstract: A transmitter in a process control system includes input/output circuitry for coupling to a process control loop. A first sensor having a first impedance is responsive to a first sensed parameter. A second sensor having a second impedance is responsive to a sensed parameter. First and second excitation signals are applied to the first and second sensors. A summing node sums the outputs of the first and second sensors. An analog to digital converter provides a digital output representative of the summed signals. Digital signal processing circuitry coupled to the analog to digital converter provides an output related to the outputs of the first and second sensors to the input/output circuitry for transmission over the process control loop.
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公开(公告)号：HUT68107A
公开(公告)日：1995-05-29
申请号：HU9401103
申请日：1992-10-13
Applicant: ROSEMOUNT INC
Inventor： SCHULTE JOHN P , LOFGREN LYLE E , SEEMAN BRIAN
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.
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公开(公告)号：ZA927996B
公开(公告)日：1994-04-18
申请号：ZA927996
申请日：1992-10-16
Applicant: ROSEMOUNT INC
Inventor： LOFGREN LYLE E , SCHULTE JOHN P , SEEMANN BRIAN
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.
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