公开(公告)号：DE69420853D1

公开(公告)日：1999-10-28

申请号：DE69420853

申请日：1994-07-29

Applicant: ROSEMOUNT INC

Inventor： LOUWAGIE BENNETT ,  MUNSON GREGORY ,  WIKLUND DAVID ,  ZWEBER MICHAEL ,  BRODEN DAVID ,  BISCHOFF BRIAN ,  CORPRON GARY

IPC: G01F1/36 ,  G01F1/88 ,  G01F15/06 ,  G01F23/14 ,  G01F23/18 ,  G01L7/08 ,  G01L9/04 ,  G01L19/00 ,  G01L19/08

Abstract: A two-wire transmitter senses a pressure using an internal pressure sensor. The transmitter includes an input for receiving a process variable from a remote sensor which is separated from the transmitter. Circuitry in the transmitters transmits information on a two-wire process control loop which is related to the sensed pressure and the process variable.

公开(公告)号：DE3886946T2

公开(公告)日：1994-05-05

申请号：DE3886946

申请日：1988-09-12

Applicant: ROSEMOUNT INC

Inventor： KLEVEN LOWELL ,  CORPRON GARY

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.

公开(公告)号：DE69420853T2

公开(公告)日：2000-05-18

申请号：DE69420853

申请日：1994-07-29

Applicant: ROSEMOUNT INC

Inventor： LOUWAGIE BENNETT ,  MUNSON GREGORY ,  WIKLUND DAVID ,  ZWEBER MICHAEL ,  BRODEN DAVID ,  BISCHOFF BRIAN ,  CORPRON GARY

IPC: G01F1/36 ,  G01F1/88 ,  G01F15/06 ,  G01F23/14 ,  G01F23/18 ,  G01L7/08 ,  G01L9/04 ,  G01L19/00 ,  G01L19/08

Abstract: A two-wire transmitter senses a pressure using an internal pressure sensor. The transmitter includes an input for receiving a process variable from a remote sensor which is separated from the transmitter. Circuitry in the transmitters transmits information on a two-wire process control loop which is related to the sensed pressure and the process variable.

公开(公告)号：DE3886946D1

公开(公告)日：1994-02-17

申请号：DE3886946

申请日：1988-09-12

Applicant: ROSEMOUNT INC

Inventor： KLEVEN LOWELL ,  CORPRON GARY

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.