公开(公告)号：US12061211B2

公开(公告)日：2024-08-13

申请号：US17046008

申请日：2019-04-12

申请人： TECHNISCHE UNIVERSITÄT BERLIN

发明人： Roland Rückert ,  Mario Eck ,  Dirk Wieser ,  Dieter Peitsch

IPC分类号： G01P5/14 ,  G01F1/20 ,  G01F1/34 ,  G01F1/36

CPC分类号： G01P5/14 ,  G01F1/206 ,  G01F1/34 ,  G01F1/36

摘要： The invention relates to a boundary layer probe for determining a fluid flow, comprising a measuring surface which is formed on a probe wall and with which a fluid flow to be determined is in contact during a measuring operation. The boundary layer probe also comprises an assembly of measuring obstacles that are formed in the region of the measuring surface as obstacles which disrupt the fluid flow in a flow region adjacent to the measuring surface, each of which has an elongated obstacle course extending over a particular obstacle length, and which are arranged at substantially equidistant angular distances in the circumferential direction. The boundary layer probe additionally has pressure measuring points, each of which is radially adjacent to an associated obstacle in order to detect a local pressure in the region of the measuring surface. The invention additionally relates to a measuring assembly and to a method for determining a fluid flow.

公开(公告)号：US11988543B2

公开(公告)日：2024-05-21

申请号：US17755966

申请日：2020-11-26

申请人： FUJIKIN INCORPORATED

发明人： Atsushi Hidaka ,  Masaaki Nagase ,  Kouji Nishino ,  Nobukazu Ikeda ,  Kaoru Hirata

IPC分类号： G01F25/10 ,  G01F1/36 ,  G05D7/06

CPC分类号： G01F25/15 ,  G01F1/36 ,  G05D7/0635

摘要： An abnormality detection method is performed in a gas supply system including a flow rate control device having a restriction part, a control valve, a flow rate control pressure sensor for measuring upstream pressure, and a control circuit. The inflow pressure sensor measures the supply pressure. An upstream on/off valve is provided upstream of the inflow pressure sensor. The method includes closing the upstream on/off valve when the gas flows at a controlled flow rate at the downstream of the restriction part by controlling an opening degree of the control valve based on the output of the flow rate control pressure sensor; measuring a drop in supply pressure on the upstream side of the control valve after closing the upstream on/off valve while keeping the control valve open; and detecting the presence or absence of abnormality in the flow rate control device based on the measured supply pressure drop.

公开(公告)号：US11920968B2

公开(公告)日：2024-03-05

申请号：US16976926

申请日：2019-03-06

申请人： ebm-papst Mulfingen GmbH & Co. KG

发明人： Thomas Sauer

IPC分类号： G01F15/063 ,  G01F1/36 ,  G06Q10/20 ,  G06Q30/0283 ,  G06Q30/04 ,  G06Q50/06

CPC分类号： G01F15/063 ,  G01F1/36 ,  G06Q30/0283 ,  G06Q30/04 ,  G06Q50/06 ,  G06Q10/20

摘要： An apparatus and a method for ascertaining and billing for a volume of air generated by an air-conveying device. The air quantity ascertaining and billing apparatus has an air-conveying device generating an air volume flow through an air passage. A measuring device measures air-related parameters of the particular air volume flow. An analysis unit analyzes the measured parameters, in order to determine the total air volume that was conveyed by the air conveying device through the air passage over a period. A transfer device transfers the value determined for the air volume by the analysis unit to a validation device. The validation device links the air volume flow or the determined air volume to an economic value, in order to obtain a billing value for the generated air volume.

公开(公告)号：US11860010B2

公开(公告)日：2024-01-02

申请号：US17292214

申请日：2019-11-08

申请人： Spirax-Sarco Limited

发明人： Adam Hughes ,  Martin Folkesson

IPC分类号： G01F1/36 ,  G01F15/00

CPC分类号： G01F1/36 ,  G01F15/005

摘要： A differential pressure metering apparatus includes a manifold for fluidically coupling impulse lines. The manifold also includes a rigid body having a base, and an arm extending from the base, with a high and low pressure channel extending through the body from a high pressure inlet to opposing first and second high pressure outlet ports, and from a low pressure inlet to opposing first and second low pressure outlet ports respectively. The manifold is configured to be mounted to a flow restrictor pipe section in a wet-line configuration, in which the first high and low pressure outlet ports define impulse line extension directions having a downward component, and the second high and low pressure outlet ports define impulse line extension directions having an upward component.

公开(公告)号：US20190242741A1

公开(公告)日：2019-08-08

申请号：US15890444

申请日：2018-02-07

申请人： Saudi Arabian Oil Company

发明人： Muhammad Idris ,  Mohammed A. Al-Atwi

IPC分类号： G01F25/00 ,  E21B47/06 ,  E21B49/08 ,  E21B47/10 ,  G01F1/44

CPC分类号： G01F25/0053 ,  E21B43/12 ,  E21B43/34 ,  E21B47/06 ,  E21B47/065 ,  E21B47/10 ,  E21B49/08 ,  E21B2049/085 ,  G01F1/36 ,  G01F1/44 ,  G01F1/74 ,  G01F25/0007

摘要： Systems and methods for finding and solving problems with wet gas venturi meters in one or more gas well sites include one or more gas well sites configured to supply gas to a gas plant, each gas well site comprising a gas well connected to a piping, one or more valves installed on the piping, one or more pressure sensors, one or more temperature sensors, one or more venturi meters configured to measure a differential pressure of the gas in the piping, and one or more programmable logic controllers configured to receive the measured data from the pressure sensors, temperature sensors, and the venturi meters, receive a plurality of dimensions of the one or more venturi meters, receive a plurality of fluid properties values and, determine a first gas rate and first condensate rate for each of the well sites.

公开(公告)号：US20190212177A1

公开(公告)日：2019-07-11

申请号：US16227368

申请日：2018-12-20

申请人： STMicroelectronics S.r.l.

发明人： Fabio Passaniti ,  Enrico Rosario Alessi

IPC分类号： G01F1/72 ,  G01N29/02 ,  G01F1/36 ,  G01M3/28

CPC分类号： G01F1/72 ,  G01F1/36 ,  G01F1/712 ,  G01M3/20 ,  G01M3/26 ,  G01M3/28 ,  G01N29/02 ,  G01P5/14 ,  G01P5/22

摘要： A method includes: receiving, from a plurality of sensors, detection signals indicative of fluid flow, the fluid flow having a direction and a speed, the plurality of sensors having respective mutual positions and distances between pairs of sensors in the plurality of sensors; determining, as a function of the detection signals, a first detection sensor in the plurality of sensors detecting the fluid flow prior to other sensors in the plurality of sensors; determining time delays between detection of the fluid flow by a first sensor and by a second sensor in each pair of sensors in the plurality of sensors; and determining a fluid flow velocity vector indicative of the direction and the speed of the fluid flow as a function of the mutual positions and distances between the pairs of sensors in the plurality of sensors and the time delays.

公开(公告)号：US20180356266A1

公开(公告)日：2018-12-13

申请号：US15740872

申请日：2016-06-21

申请人： Oxford University Innovation Limited

发明人： Peter Alistair Robbins ,  David O'Neill ,  John Couper ,  Gus Hancock ,  Grant Ritchie ,  Luca Ciaffoni

IPC分类号： G01F1/40 ,  A61B5/083 ,  A61B5/087 ,  G01N21/39

CPC分类号： G01F1/40 ,  A61B5/0833 ,  A61B5/0836 ,  A61B5/087 ,  A61M2016/0036 ,  A61M2016/1025 ,  A61M2230/432 ,  G01F1/36 ,  G01N21/031 ,  G01N21/3504 ,  G01N21/39

摘要： A molecular flow sensor includes a flowmeter integrated with an in airway laser gas analyser. The laser gas analyser spectroscopically analyses the concentrations of gases in a measurement space. The gas flow is measured by measuring the pressure drop across the flow-sensing mesh screens using a differential pressure sensor. Helical baffles are provided upstream and downstream of the measurement space to provide a low resistance gas flow path while blocking ambient light from entering the measurement space, and flow-conditioning elements of mesh or metal foam are provided between the helical baffles and the flow-sensing meshes. Pressure averaging is conducted circumferentially around the gas flow path. At least two independent pressure sensors may be provided, switchable out independently to allow regular calibration while the other is still measuring. The flow sensor is particularly useful for measuring respiratory gas exchange such as oxygen consumption or carbon dioxide production by a respiring subject.

公开(公告)号：US20180264491A1

公开(公告)日：2018-09-20

申请号：US15919779

申请日：2018-03-13

申请人： Jonas Goldowsky ,  Noa Schmid ,  Siegfried F. Graf ,  Helmut Knapp

发明人： Jonas Goldowsky ,  Noa Schmid ,  Siegfried F. Graf ,  Helmut Knapp

IPC分类号： B05B7/24 ,  G01F1/36 ,  G01F15/075 ,  G01F23/14

CPC分类号： B05B7/2489 ,  B01L3/0293 ,  B01L2200/0605 ,  B01L2200/146 ,  B01L2400/0487 ,  G01F1/36 ,  G01F11/284 ,  G01F13/006 ,  G01F15/0755 ,  G01F22/00 ,  G01F22/02 ,  G01F23/14

摘要： An apparatus and method for precisely dispensing liquid fluid from a container are disclosed. The apparatus comprises a metering unit having a gas feedthrough channel with a first end extending in a gas containing part of the chamber and a second end opposite the first end extending outside the chamber, the metering unit further comprising a flow sensing assembly configured to measure a gas pressure differential Δp and/or gas flow V{dot over ( )} within the gas feedthrough channel and to introduce or release a determined volume of gas in the chamber to dispense a controlled volume of liquid from the chamber.

公开(公告)号：US20180188700A1

公开(公告)日：2018-07-05

申请号：US15858689

申请日：2017-12-29

申请人： Reno Technologies, Inc.

发明人： Sean Penley ,  Michael Maeder

IPC分类号： G05B13/02 ,  G01N7/00 ,  G01F17/00 ,  G01F1/36 ,  G05D7/06

CPC分类号： G05B13/024 ,  G01F1/36 ,  G01F15/002 ,  G01F15/005 ,  G01F17/00 ,  G01F22/02 ,  G01F25/0038 ,  G01F25/0053 ,  G01N7/00 ,  G05D7/005 ,  G05D7/0186 ,  G05D7/0623

摘要： Apparatuses for controlling gas flow are important components for delivering process gases for semiconductor fabrication. In one embodiment, a method of calibrating an apparatus for controlling gas flow is disclosed. Specifically, the apparatus may be calibrated on installation using a two-step process of measuring the volume of gas box downstream from the apparatus by flowing nitrogen gas into the gas box and measuring the resulting temperature and rate of pressure rise. Using the computed volume of the gas box, a sweep of several mass flow rates may be performed using the process gas and the gas map for the process gas. The apparatus is calibrated based on the measured temperature and pressure values, which allow calculation of the actual mass flow rate for the process gas as compared with the commanded mass flow rates.

公开(公告)号：US20180164135A1

公开(公告)日：2018-06-14

申请号：US15837931

申请日：2017-12-11

申请人： HORIBA STEC, Co., Ltd.

发明人： Daniel Thomas Mudd ,  William Wylie White ,  Michael Kramer ,  Tadahiro Yasuda

IPC分类号： G01F1/36 ,  G01F1/50

CPC分类号： G01F1/36 ,  G01F1/363 ,  G01F1/40 ,  G01F1/50 ,  G01F25/0007

摘要： To provide a flow rate characteristic function identification method, flow rate sensor, and flow rate characteristic function identification program that can set a flow rate characteristic function reflecting not only the type or shape of a fluid resistance but also the effects of states such as an attachment state of the fluid resistance, and calculate a flow rate with higher accuracy. An actual flow rate characteristic function, which is a flow rate characteristic function when an actual fluid resistance is provided in a flow path, is identified on the basis of multiple flow rate characteristic functions including a first reference flow rate characteristic function and a second reference flow rate characteristic function, and predetermined weighting.