公开(公告)号：US11156486B2

公开(公告)日：2021-10-26

申请号：US16570322

申请日：2019-09-13

Applicant: Micro Motion Inc.

Inventor： Scot R. Foss

IPC: G01F1/60

Abstract: The magnetic flowmeter includes at least one coil and a pair of electrodes is configured to detect an electromotive force within the process fluid flow in response to the magnetic field. Measurement circuitry is coupled to the electrodes and is configured to provide an indication of the detected electromotive force. A processor is coupled to the measurement circuitry and is configured to receive the indication of the detected electromotive force. The processor is configured to obtain a sequence of indications of detected electromotive force over a time interval and to generate a plurality of sets of emf samples by selecting non-continuous indications of the detected electromotive force. Each of the sets of emf samples is processed by a signal processing engine to provide an emf sample output. The processor is configured to combine emf sample outputs from each set of emf samples to generate a process fluid flow output.

公开(公告)号：US20210080299A1

公开(公告)日：2021-03-18

申请号：US16570301

申请日：2019-09-13

Applicant: Micro Motion Inc.

Inventor： Scot R. Foss ,  Andrew T. Kline

IPC: G01F1/58 ,  G01F1/60

Abstract: A magnetic flowmeter includes at least one coil configured to generate a magnetic field within a process fluid flow. A pair of electrodes is configured to detect an electromotive force within the process fluid flow in response to the magnetic field. Measurement circuitry is operably coupled to the pair of electrodes and configured to provide an indication of the detected electromotive force. A processor is coupled to the measurement circuitry and is configured to receive the indication of the detected electromotive force and an indication of process noise. The processor is configured to change a dead time parameter based on the indication of process noise and provide a process fluid flow output based on the indication of detected electromotive force and the dead time parameter.

公开(公告)号：US11092470B2

公开(公告)日：2021-08-17

申请号：US16570301

申请日：2019-09-13

Applicant: Micro Motion Inc.

Inventor： Scot R. Foss ,  Andrew T. Kline

IPC: G01F1/60 ,  G01F1/58 ,  G01D3/032

Abstract: A magnetic flowmeter includes at least one coil configured to generate a magnetic field within a process fluid flow. A pair of electrodes is configured to detect an electromotive force within the process fluid flow in response to the magnetic field. Measurement circuitry is operably coupled to the pair of electrodes and configured to provide an indication of the detected electromotive force. A processor is coupled to the measurement circuitry and is configured to receive the indication of the detected electromotive force and an indication of process noise. The processor is configured to change a dead time parameter based on the indication of process noise and provide a process fluid flow output based on the indication of detected electromotive force and the dead time parameter.

公开(公告)号：US11085803B2

公开(公告)日：2021-08-10

申请号：US14863734

申请日：2015-09-24

Applicant: Micro Motion, Inc.

Inventor： Michael P. Machuca ,  Joseph A. Smith ,  Trever J. Ball ,  Scot R. Foss

IPC: G01F1/58 ,  G01F1/74 ,  G01F1/60 ,  G01F15/08

Abstract: A magnetic flowmeter includes at least one coil configured to generate a magnetic field within a process fluid flow. A pair of electrodes is configured to detect an electromotive force within the flowing process fluid in response to the magnetic field. Measurement circuitry is coupled to the pair of electrodes and is configured to provide an indication of the detected electromotive force. A processor is coupled to the measurement circuitry and configured to receive the indication of the detected electromotive force and determine a flow-related output based on the detected electromotive force. A diagnostics component is configured to analyze a number of successive parameters of the magnetic flowmeter in order to provide an indication of a detected entrained fluid.

公开(公告)号：US11060893B2

公开(公告)日：2021-07-13

申请号：US16570328

申请日：2019-09-13

Applicant: Micro Motion Inc.

Inventor： Scot R. Foss ,  Andrew T. Kline

IPC: G01F1/60 ,  G01F1/58

Abstract: A magnetic flowmeter includes at least one coil configured to generate a magnetic field within a process fluid flow. A pair of electrodes is configured to detect an electromotive force within the process fluid flow in response to the magnetic field. Coil drive circuitry is coupled to the at least one coil and is configured to cause the at least one coil to generate the magnetic field. Measurement circuitry is operably coupled to the pair of electrodes and configured to provide an indication of the detected electromotive force. A processor is coupled to the measurement circuitry and the coil drive circuitry. The processor is configured to cause the coil drive circuitry to operate at one of a plurality of coil drive frequencies. The processor is also configured to obtain a plurality of measurement samples while process fluid is flowing and while the coil drive circuitry is operating at a first frequency. The processor is configured to generate an autozero estimate for operation at a second coil drive frequency higher than the first coil drive frequency and to save the autozero estimate for use during operation at the second coil drive frequency.

公开(公告)号：US20210080301A1

公开(公告)日：2021-03-18

申请号：US16570328

申请日：2019-09-13

Applicant: Micro Motion Inc.

Inventor： Scot R. Foss ,  Andrew T. Kline

IPC: G01F1/60

Abstract: A magnetic flowmeter includes at least one coil configured to generate a magnetic field within a process fluid flow. A pair of electrodes is configured to detect an electromotive force within the process fluid flow in response to the magnetic field. Coil drive circuitry is coupled to the at least one coil and is configured to cause the at least one coil to generate the magnetic field. Measurement circuitry is operably coupled to the pair of electrodes and configured to provide an indication of the detected electromotive force. A processor is coupled to the measurement circuitry and the coil drive circuitry. The processor is configured to cause the coil drive circuitry to operate at one of a plurality of coil drive frequencies. The processor is also configured to obtain a plurality of measurement samples while process fluid is flowing and while the coil drive circuitry is operating at a first frequency. The processor is configured to generate an autozero estimate for operation at a second coil drive frequency higher than the first coil drive frequency and to save the autozero estimate for use during operation at the second coil drive frequency.

公开(公告)号：US20210080300A1

公开(公告)日：2021-03-18

申请号：US16570322

申请日：2019-09-13

Applicant: Micro Motion Inc.

Inventor： Scot R. Foss

IPC: G01F1/60

Abstract: A magnetic flowmeter includes at least one coil configured to generate a magnetic field within a process fluid flow. A pair of electrodes is configured to detect an electromotive force within the process fluid flow in response to the magnetic field. Measurement circuitry is operably coupled to the pair of electrodes and is configured to provide an indication of the detected electromotive force. A processor is coupled to the measurement circuitry and configured to receive the indication of the detected electromotive force. The processor is configured to obtain a sequence of indications of detected electromotive force over a time interval and to generate a plurality of sets of emf samples by selecting non-contiguous indications of the detected electromotive force. Each of the plurality of sets of emf samples is processed by a signal processing engine to provide an emf sample output. The processor is configured to combine emf sample outputs from each set of emf samples to generate a process fluid flow output. In another aspect, the processor is configured to obtain the sequence of indications of detected electromotive force over a timer interval and generate a plurality of data streams from the sequence of indications of detected electromotive force. The processor is further configured to perform signal processing on each stream to generate a plurality of stream outputs and to generate a process flow output based on a combination of the plurality of data stream outputs. In a further aspect, the processor is configured to calculate median absolute deviation of each data stream to provide each data stream output.