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    ROCKING BEAM VORTEX SENSOR
    12.
    发明专利
    ROCKING BEAM VORTEX SENSOR 未知

    公开(公告)号：CA1321481C

    公开(公告)日：1993-08-24

    申请号：CA577371

    申请日：1988-09-14

    Applicant: ROSEMOUNT INC

    Inventor： KLEVEN LOWELL A ,  CORPRON GARY P

    IPC: G01F1/32

    Abstract: A vortex sensor used in a vortex flowmeter that has a single sensing diaphragm parallel to the direction of flow that is sensitive to differential pressures caused by vortices shed by a vortex shedding bar associated with the sensing diaphragm. A beam is attached to the sensing diaphragm and it transfers the deflecting motion of the sensing diaphragm due to differential pressures to a sensor external to the flow passageway. The sensor provides an output indicating motions of the beam caused by the beam pivoting when the sensing diaphragm deflects. The beam preferably is pivoted on a relatively rigid, fluid-tight isolator diaphragm with one end of the beam on the outside of the isolator diaphragm. The sensing diaphragm which is used to measure differential pressure rejects variations in the static pressure, that is, increases and decreases of the static pressure on both sides of the diaphragm, which is a common source of problems with existing vortex flowmeter sensors.

    OPTICAL DISPLACEMENT SENSOR
    13.
    发明专利
    OPTICAL DISPLACEMENT SENSOR 未知

    公开(公告)号：CA1292532C

    公开(公告)日：1991-11-26

    申请号：CA566805

    申请日：1988-05-13

    Applicant: ROSEMOUNT INC

    Inventor： CORPRON GARY P ,  KLEVEN LOWELL A ,  JOHNSON LAWRENCE A

    IPC: G01D5/30 ,  G01D5/26 ,  G01D5/353 ,  G01F1/32 ,  G01P5/00 ,  G01P13/00 ,  G01J5/16

    Abstract: The optical displacement sensor modulates intensity of the light beam as a function of the physical displacement. The sensor includes a reflector positioned in a path of the light beam between a slight source and a light detector . The reflector has a non-reflective portion surrounded by a reflective portion . Relative movement (displacement) of the beam and the reflector occurs as a function of a parameter which is being sensed. In a normal (no displacement) condition, the non-reflective portion can be positioned with respect to the light beam so that intensity of the light beam received by the detector is at a minimum, and the sensor is operating in a darkfield mode. Displacement from the normal position causes an increase in the light intensity received by the detector.

    ROCKING BEAM VORTEX SENSOR
    14.
    发明专利
    ROCKING BEAM VORTEX SENSOR 未知

    公开(公告)号：AU3255289A

    公开(公告)日：1990-11-01

    申请号：AU3255289

    申请日：1989-04-07

    Applicant: ROSEMOUNT INC

    Inventor： CORPRON GARY P

    IPC: G01F1/32 ,  G01F1/38

    Abstract: A vortex sensor used in a vortex flowmeter that has a single sensing diaphragm parallel to the direction of flow that is sensitive to differential pressures caused by vortices shed by a vortex shedding bar associated with the sensing diaphragm. A beam is attached to the sensing diaphragm and it transfers the deflecting motion of the sensing diaphragm due to differential pressures to a sensor external to the flow passageway. The sensor provides an output indicating motions of the beam caused by the beam pivoting when the sensing diaphragm deflects. The beam preferably is pivoted on a relatively rigid, fluid-tight isolator diaphragm with one end of the beam on the outside of the isolator diaphragm. The sensing diaphragm which is used to measure differential pressure rejects variations in the static pressure, that is, increases and decreases of the static pressure on both sides of the diaphragm, which is a common source of problems with existing vortex flowmeter sensors.

    DIFFERENTIAL PRESSURE VORTEX SENSOR
    16.
    发明专利
    DIFFERENTIAL PRESSURE VORTEX SENSOR 未知

    公开(公告)号：CA1190407A

    公开(公告)日：1985-07-16

    申请号：CA422621

    申请日：1983-03-01

    Applicant: ROSEMOUNT INC

    Inventor： CORPRON GARY P ,  PAGEL ROY E

    IPC: G01F1/32

    Abstract: DIFFERENTIAL PRESSURE VORTEX SENSOR A differential pressure sensor adapted specifically for use with vortex shedding flowmeters which can be used in small spaces, uses a bending beam for providing an electrical signal proportional to differential pressures between two oppositely facing diaphragms . The diaphragms deflect under differential pressure and cause the beam to be bent. The diaphragms have low mass and have a support structure between them, carrying spring clips which load one end of the bending beam . The other end of the bending beam is then supported so it cantilevers from its mounting or support and upon movement of the diaphragms under differential pressure the beam will bend. The signal can be derived by using a bending element made of a piezoelectric "bimorph" beam, which provides a voltage output as it bends, a strain gauge sensor on the beam, or an optical sensor, such as a fine fiber which deflects and provides an optical output, may be used, as well as similar devices. Preferably, the sensor is a piezoelectric bimorph beam because of the direct electrical signals provided, which result from bending of the beam .

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