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    THERMAL, FLOW MEASURING DEVICE WITH DIAGNOSTIC FUNCTION
    52.
    发明申请
    THERMAL, FLOW MEASURING DEVICE WITH DIAGNOSTIC FUNCTION 审中-公开

    公开(公告)号：US20180031403A1

    公开(公告)日：2018-02-01

    申请号：US15535446

    申请日：2015-12-03

    Applicant: Endress + Hauser Flowtec AG

    Inventor： Martin Arnold ,  Axel Pfau

    IPC: G01F1/696

    CPC classification number: G01F1/696 ,  G01F1/6842 ,  G01F1/69 ,  G01F25/0007 ,  G01P5/12

    Abstract: A thermal, flow measuring device for determining and/or monitoring the mass flow (φM) and/or the flow velocity (vF) of a flowable medium through a pipeline, comprising at least three sensor elements and an electronics unit, as well as method for operating a thermal, flow measuring device. Each sensor element is at least partially and/or at times in thermal contact with the medium, and includes a heatable temperature sensor. The electronics unit is embodied to heat each of the three sensor elements with a heating power, to register their temperature, to heat at least two of the at least three sensor elements simultaneously, continuously to ascertain the mass flow (φM) and/or the flow velocity (vF) of the medium, and, simultaneously, from a pairwise comparison of the temperatures and/or heating powers, to provide information concerning the state of at least one of the at least three sensor elements, and in the case that a malfunction and/or a deposit occurs on at least one of the at least three sensor elements, to perform a correction of the measured value for the mass flow (φM) and/or the flow velocity (vF) and/or to generate and to output a report concerning the state of the at least one sensor element.

    MEMS thermal flow sensor with compensation for fluid composition
    53.
    发明授权
    MEMS thermal flow sensor with compensation for fluid composition 有权

    公开(公告)号：US09874467B2

    公开(公告)日：2018-01-23

    申请号：US15047839

    申请日：2016-02-19

    Applicant: MEMSIC, INC.

    Inventor： Thomas O. Maginnis ,  Nan Jou Pern ,  Zhengxin Zhao ,  Yongyao Cai ,  Yang Zhao

    IPC: G01F1/696 ,  G01F1/684 ,  G01F25/00 ,  G01F1/688 ,  G01F15/04 ,  G01F1/36 ,  G01N11/08

    CPC classification number: G01F1/6845 ,  G01F1/36 ,  G01F1/688 ,  G01F15/046 ,  G01F25/0053 ,  G01N11/08

    Abstract: The present invention provides a MEMS thermal flow sensor or meter for measuring the flow rate of a fluid without need for calibration of the flow sensor for that particular fluid. A response curve is determined by plotting the sensor output voltage against the volume flow rate divided by fluid thermal diffusivity for a calibration fluid of known thermal diffusivity, and storing response curve data in memory. A conversion factor is employed to provide a measure of correct flow rate of an unknown fluid. This conversion factor is derived from the ratio of the thermal time constant of the calibration fluid to the thermal time constant of the measured fluid, the time constants being measured at zero flow. These time constants are stored in memory. This conversion factor in conjunction with the response curve data is utilized by the processor to produce the correct flow rate. The invention also encompasses a method for measuring fluid flow rate of fluids of differing properties without necessity of a separate flow calibration for each fluid.

    Human Machine Interface for a Remote Terminal Unit
    55.
    发明申请
    Human Machine Interface for a Remote Terminal Unit 审中-公开

    公开(公告)号：US20170356780A1

    公开(公告)日：2017-12-14

    申请号：US15620706

    申请日：2017-06-12

    Applicant: Relevant Solutions, LLC

    Inventor： Matthew G. Smith ,  Andrew D. Hutson

    IPC: G01F15/06 ,  G01F1/696 ,  G01F1/34

    Abstract: Various implementations described herein are directed to a petrochemical measurement system. A remote terminal unit includes a network data server. A human machine interface may be an autonomous network data client in communication with the remote terminal unit. The human machine interface may include: a memory having configuration parameter software stored thereon; a user interface configured to receive configuration parameter input using the configuration parameter software; and a processor configured to send the configuration parameters received from the user interface of the HMI to the remote terminal unit.

    Thermal Flow Meter
    56.
    发明申请
    Thermal Flow Meter 审中-公开

    公开(公告)号：US20170336232A1

    公开(公告)日：2017-11-23

    申请号：US15659309

    申请日：2017-07-25

    Applicant: Hitachi Automotive Systems, Ltd.

    Inventor： Shinobu TASHIRO ,  Keiji HANZAWA ,  Noboru TOKUYASU ,  Takeshi MORINO ,  Ryosuke DOI ,  Akira UENODAN

    IPC: G01F1/684 ,  G01F1/696 ,  G01F15/14

    Abstract: It is an object of the present invention to improve a measurement accuracy of a thermal flowmeter. A circuit package 401 is such that a measurement surface 430 and a backside of measurement surface 431 of a rear surface thereof are located in a bypass passage, and the bypass passage is configured to allow a measurement target gas 30 to flow upon dividing the measurement target gas 30 into a flow path 386 at a side of the measurement surface 430 of the circuit package and a flow path 387 at a side of the backside of measurement surface 431 of a rear surface of the measurement surface 430, and an inflow-side end surface of the circuit package for dividing the measurement target gas 30 has different shapes at the side of the measurement surface and at the side of the backside of measurement surface. The inflow-side end surface of the circuit package for dividing the measurement target gas 30 is formed with a reference line 700 dividing the measurement target gas 30, and an end surface 701a at the side of the measurement surface with respect to the reference line and an end surface 701b at the side of the backside of measurement surface with respect to the reference line are formed to be asymmetrical.

    Thermal, Flow Measuring Device
    60.
    发明申请
    Thermal, Flow Measuring Device 审中-公开

    公开(公告)号：US20170307428A1

    公开(公告)日：2017-10-26

    申请号：US15520102

    申请日：2015-09-02

    Applicant: Endress + Hauser Flowtec AG

    Inventor： Krishna Malladi ,  Martin Arnold ,  Michel Wagner

    IPC: G01F1/684 ,  G01F1/69 ,  G01P13/00 ,  G01F1/696

    CPC classification number: G01F1/6847 ,  G01F1/688 ,  G01F1/69 ,  G01F1/6965 ,  G01F25/0007 ,  G01P13/0046

    Abstract: A thermal, flow measuring device for ascertaining a mass flow or a flow velocity of a medium in a pipe. The thermal, flow measuring device has at least one measuring transducer with at least a first and a second sensor element. The first sensor element has a pin-shaped metal sleeve, which has a lowest point on a wall of the metal sleeve in the gravitational direction, wherein there is arranged in the metal sleeve at least one heating means, especially a heatable temperature sensor. The heating means is arranged in the metal sleeve and above the aforementioned point in the gravitational direction, in such a manner that the maximum heat input per unit area from the heating means into the medium occurs in the gravitational direction above the point.

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