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    MEASUREMENT CIRCUIT.
    2.
    发明专利
    MEASUREMENT CIRCUIT. 未知

    公开(公告)号：MY102916A

    公开(公告)日：1993-03-31

    申请号：MYPI19872132

    申请日：1987-09-29

    Applicant: ROSEMOUNT INC

    Inventor： ROGER L FRICK ,  JOHN P SCHULTE

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

    Abstract: A MEASUREMENT CIRCUIT (10, 50, 500) PROVIDES AN OUTPUT SIGNAL AS A FUNCTION OF AN INPUT SIGNAL. THE MEASUREMENT CIRCUIT INCLUDES A CHARGE GENERATOR (18, 58, 520) WHICH PROVIDES PACKETS OF CHARGE AS A FUNCTION OF THE INPUT SIGNAL TO A MEASUREMENT ELEMENT (34, 7 4, 540). THE MEASUREMENT ELEMENT (34, 74, 540) MEASURES THE CHARGE PROVIDED AND PROVIDES A MEASUREMENT SIGNAL AS A FUNCTION OF THE CHARGE RECEIVED.THE MEASUREMENT SIGNAL (28,72) IS COUPLED TO A FEEDBACK CIRCUIT (9, 59) WHICH COUPLES TO SWITCHES IN THE CHARGE GENERATOR (18, 58, 520) TO CONTROL PRODUCTION OF CHARGE PACKETS. THE FEEDBACK CIRCUIT (9, 59, 538) PROVIDES AT LEAST ONE OUTPUT SIGNAL INDICATIVE OF THE QUANTITY OR NUMBER OF CHARGE PACKETS PROVIDED. (FIG. 1)

    DIFFERENTIAL PRESSURE SENSOR
    3.
    发明专利
    DIFFERENTIAL PRESSURE SENSOR 未知

    公开(公告)号：MY100597A

    公开(公告)日：1990-12-15

    申请号：MYPI19871473

    申请日：1987-08-28

    Applicant: ROSEMOUNT INC

    Inventor： ROGER L FRICK ,  THOMAS A KNECHT ,  STEVEN M BRUESEHOFF

    IPC: G01L7/08 ,  G01L9/04 ,  G01L9/12

    Abstract: A CELL (10) FOR SENSING DIFFERENTIAL PRESSURES HAS A SINGLE BRITTLE MATERIAL DIAPHRAGM (43) MOUNTED ON SUPPORT PLATES POSITIONED ON OPPOSITE SIDES OF THE DIAPHRAGM. THE DIAPHRAGM SURFACES WHEN AT ZERO DIFFERENTIAL PRESSURE FACING THE SUPPORT ARE CONCAVE AND SHAPED TO CONFORM VERY CLOSELY TO THE SHAPE THE DIAPHRAGM HAS WHEN IT IS DEFLECTED SO THAT WHEN THE DIAPHRAGM (43) IS UNDER A SELECTED PRESSURE AND IT IS FORCED AGAINST ONE OF THE SUPPORTS IN EITHER DIRECTION, THE DIAPHRAGM IS SUBSTANTIALLY PLANAR OR FLAT AND SUPPORTED FULLY ON ITS SUPPORT PLATE. THE DIAPHRAGM (43) MAY BE SHAPED BY PLACING IT UNDER A PRESSURE SO THAT IT BOWS OR DEFLECTS AND THEN GRINDING THE SURFACE OPPOSITE FROM THE APPLIED PRESSURE FLAT.(FIG. 6)

    CAPACITANCE PRESSURE SENSOR.
    4.
    发明专利
    CAPACITANCE PRESSURE SENSOR. 未知

    公开(公告)号：MY100233A

    公开(公告)日：1990-05-29

    申请号：MYPI19872170

    申请日：1987-09-29

    Applicant: ROSEMOUNT INC

    Inventor： THOMAS A KNECHT ,  ROGER L FRICK

    IPC: G01L7/08 ,  G01L9/12

    Abstract: THE PRESSURE SENSOR (47) IS MADE UP OF A SANDWICH CONSTRUCTION INCLUDING A SILICON WAFER (10) WHICH IS ETCHED FROM ONE SIDE TO MAKE CAVITIES (14) IN A PLURALITY OF DESIRED LOCATIONS TO FORM DEFLECTING DIAPHRAGMS (12), ONE SURFACE OF WHICH ACTS AS A CAPACITOR PLATE. A GLASS LAYER (20) IS METALIZED ON BOTH SIDES AND HAS HOLES DRILLED IN LOCATIONS THAT ALIGN WITH THE DIAPHRAGMS FORMED ON THE SILICON WAFER (10). THE FOUR LAYER SANDWICH IS THEN CUT UP INTO INDIVIDUAL SENSORS (47).(FIG. 3)

    THREE WIRE LOW POWER TRANSMITTER WATER
    5.
    发明专利
    THREE WIRE LOW POWER TRANSMITTER WATER 未知

    公开(公告)号：MY109146A

    公开(公告)日：1996-12-31

    申请号：MYPI19921554

    申请日：1992-08-28

    Applicant: ROSEMOUNT INC

    Inventor： ROGER L FRICK ,  STEPHEN D ANDERSON ,  GLEN E MONZO ,  BRIAN L WESTFIELD

    IPC: G08C19/02 ,  G06C19/00

    Abstract: A THREE WIRE TRANSMITTER (50) BIDIRECTIONALLY COMMUNICATES AC SIGNALS TO AND FROM A FIRST EXTERNAL DEVICE (59) AND SENDS DC SIGNALS TO A SECOND EXTERNAL DEVICE (59). THE TRANSMITTER (50) INCLUDES A SENSOR CIRCUIT (52) AND A COMMUNICATION CIRCUIT (70), BOTH ENERGIZED FROM POWER (66) AND COMMON (69) TERMINALS OF THE TRANSMITTER (50). THE COMMUNICATION CIRCUIT (70) RECEIVES A SENSOR OUTPUT INDICATING A SENSED PROCESS VARIABLE AND PROVIDE DC AND AC SIGNALS TO A SIGNAL TERMINAL (68) WHICH CONNECTS TO BOTH EXTERNAL DEVICES (59), AND ALSO RECEIVES AC SIGNALS FROM THE FIRST EXTERNAL DEVICE (59). THE DC SIGNAL IS REPRESENTATIVE OF THE SENSED PROCESS VARIABLE, AND THE AC SIGNAL IS DIGITALLY REPRESENTATIVE OF THE SENSED PROCESS VARIABLE AND OF TRANSMITTER DATA SELECTED BY THE RECEIVED AC SIGNAL. THE COMMUNICATION CIRCUIT (70) HAS A CHARACTERISTIC IMPEDANCE BOTH AC AND DC, BETWEEN THE SIGNAL (68) AND COMMON (69) TERMINALS SELECTED SO THE DC IMPEDANCE IS SUBSTANTIALLY LOWER THAN THE IMPEDANCE OF THE SECOND EXTERNAL DEVICE (59) WHICH RECEIVES DC SIGNALS AND THE AC IMPEDANCE PROPER RECEIVING AND TRANSMITTING OF AC SIGNALS. A MICROCOMPUTER (64) IS INCLUDED IN THE COMMUNICATION CIRCUIT (70) WHICH RECEIVES, STORES AND TRANSMITS TRANSMITTER STATUS INFORMATION. (FIGURE 1)

    MEASUREMENT CIRCUIT
    6.
    发明专利
    MEASUREMENT CIRCUIT 未知

    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.

    A MEASUREMENT CIRCUIT FOR PROVIDING AN OUTPUT AS A FUNCTION OF AN INPUT SIGNAL
    7.
    发明专利
    A MEASUREMENT CIRCUIT FOR PROVIDING AN OUTPUT AS A FUNCTION OF AN INPUT SIGNAL 未知

    公开(公告)号：IN169603B

    公开(公告)日：1991-11-23

    申请号：IN278MA1987

    申请日：1987-04-15

    Applicant: ROSEMOUNT INC

    Inventor： ROGER L FRICK ,  JOHN P SCHULTE

    IPC: G01L9/12 ,  G01R20060101 ,  G01R11/52 ,  G01R27/26 ,  G01R29/24 ,  G01D5/12

    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.

    TRANSMITTER WITH AN IMPROVED SPAN ADJUSTMENT.
    8.
    发明专利
    TRANSMITTER WITH AN IMPROVED SPAN ADJUSTMENT. 未知

    公开(公告)号：MY100607A

    公开(公告)日：1990-12-15

    申请号：MYPI19872444

    申请日：1987-09-30

    Applicant: ROSEMOUNT INC

    Inventor： ROGER L FRICK

    IPC: G01D3/02 ,  G01D5/16 ,  G01G7/06 ,  G01G23/01 ,  G01L9/12

    Abstract: A TRANSMITTER (200) SENSES A PROCESS VARIABLE AND PROVIDES A TWO-WIRE OUTPUT ADJUSTED BY A SPAN ADJUSTMENT. A SPAN-CONTROLLING CIRCUIT IS COUPLED BETWEEN THE SENSOR AND THE OUTPUT CIRCUIT AND RECEIVES A SPAN ADJUSTMENT. THE SPAN-CONTROLLING CIRCUIT INCLUDES AN AMPLIFIER COUPLED TO A POTENTIOMETER. THE WIPER OF THE POTENTIOMETER IS CONNECTED TO THE AMPLIFIER OUTPUT (228) SO THAT ONE PORTION OF THE POTENTIOMETER RESISTANCE PROVIDES FEEDBACK FROM THE AMPLIFIER OUTPUT (228) TO THE AMPLIFIER INPUT(222). A SECOND PORTION OF THE POTENTIOMETER RESISTANCE IS COUPLED BETWEEN THE AMPLIFIER OUTPUT (228) AND THE OUTPUT CIRCUIT.(FIG. 4)

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