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.

公开(公告)号：US20180136021A1

公开(公告)日：2018-05-17

申请号：US15814041

申请日：2017-11-15

申请人： HORIBA STEC, Co., Ltd.

发明人： Takehisa Hataita ,  Hideaki Miyamoto

IPC分类号： G01F1/38

CPC分类号： G01F1/383 ,  G01F1/36 ,  G01L9/0072 ,  G01L13/06 ,  G01L15/00

摘要： In order to solve a problem occurring in a capacitance type pressure sensor adapted to measure absolute pressure, and thereby reduce error, a pressure type flowmeter includes a fluid resistance part in a flow path through which fluid flows and measures a flow rate by detecting the upstream and downstream pressures of the fluid resistance part. Respective pressure sensors for detecting the upstream and downstream pressures are configured to be gauge pressure sensors. Each of the gauge pressure sensors is a capacitance type pressure sensor adapted to measure gauge pressure by detecting a change in the capacitance between a diaphragm displaceable by pressure and a fixed electrode and has a main body part that supports the fixed electrode and the diaphragm and forms a space between them. Further, the internal space is adapted to communicatively connect to the outside through a communicative connection part.

公开(公告)号：US09933328B2

公开(公告)日：2018-04-03

申请号：US14910735

申请日：2014-08-08

申请人： EATON CORPORATION

发明人： Michael Berne Rannow

IPC分类号： G01M3/26 ,  G01M3/28 ,  G01F1/36

CPC分类号： G01M3/2815 ,  F15B19/005 ,  F15B20/005 ,  G01F1/36 ,  G01M3/2807

摘要： A system and method for detecting a leak in a hose of a hydraulic system having a control valve assembly with first and second work ports in fluid communication with an actuator is disclosed. In one aspect, the method includes estimating a first hydraulic fluid flow rate for fluid flowing from the control valve assembly first work port to the actuator. Another step may be estimating a second hydraulic fluid flow rate for fluid flowing from the actuator to the control valve assembly second work port. In one step, a proportional flow rate difference is calculated between the first and second hydraulic fluid flow rates. Subsequently, a flow error value can be calculated by subtracting the flow rate difference from a predetermined margin value. Where the flow error value integrated over time exceeds a total flow error threshold value, a hydraulic fluid leak signal can be generated.

公开(公告)号：US20180080692A1

公开(公告)日：2018-03-22

申请号：US15561580

申请日：2016-03-28

申请人： DAIKIN INDUSTRIES, LTD.

发明人： Masahiro HONDA ,  Shigeki KAMITANI

IPC分类号： F25B41/04 ,  F25B13/00 ,  F25B49/02

CPC分类号： F25B41/04 ,  F25B13/00 ,  F25B49/02 ,  F25B49/022 ,  F25B2400/13 ,  F25B2500/19 ,  F25B2500/222 ,  F25B2600/2501 ,  F25B2700/13 ,  F25B2700/1933 ,  F25B2700/195 ,  F25B2700/21163 ,  G01F1/36 ,  G01F1/363 ,  Y10T137/0368 ,  Y10T137/0452 ,  Y10T137/7759

摘要： A refrigeration apparatus includes a primary circuit with a first expansion valve, a bypass circuit extending between branching and joining portions on the refrigerant primary circuit, a heat exchanger, a second expansion valve disposed upstream of the heat exchanger in the bypass circuit, first and second refrigerant flow rate calculating components, and a determining component. The primary circuit also includes a compressor, radiator, and evaporator. The heat exchanger includes first and second refrigerant flow paths disposed on the primary and bypass circuits, respectively, to cause heat between refrigerant flowing in the paths. The first and second refrigerant flow rate calculating components calculate first and second flow rates of refrigerant flowing through the bypass circuit based on refrigeration cycle theory and fluid theory, respectively. The determining component determines whether there is refrigerant leakage or refrigerant charge deficiency based on comparison of the first and second refrigerant flow rates.

公开(公告)号：US20170364099A1

公开(公告)日：2017-12-21

申请号：US15632615

申请日：2017-06-26

申请人： FUJIKIN INCORPORATED

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

IPC分类号： G05D7/06 ,  G01F1/36 ,  G01F15/00

CPC分类号： G05D7/0635 ,  G01F1/36 ,  G01F15/005 ,  Y10T137/7737

摘要： To provide a flow control system with build-down system flow monitoring that realizes flow monitoring close to real-time monitoring by combining build-down system flow rate measurement with the upstream side of the flow control system without using a thermal type flow sensor by effectively utilizing high pressure fluctuation resistance characteristics of the flow control system, and can be significantly downsized and reduced in cost.