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公开(公告)号：US20230288240A1
公开(公告)日：2023-09-14
申请号：US17766357
申请日：2020-10-02
摘要： A method for determining mass flow according to the differential pressure method on an internal combustion engine, includes calculating a mass flow signal by using sensors of a mass flow meter to measure a differential pressure, an absolute pressure and a temperature of the mass flow. The mass flow signal is filtered by an evaluation unit of the mass flow meter and the filtered mass flow signal is sent to an engine control. The filter parameters are matched to a measurement situation by the evaluation unit. In a first measurement situation, the filter parameters are set on the basis of an analysis of pulsations of the current measured values and in a second measurement situation, the filter parameters are set on the basis of status data of the internal combustion engine transmitted by the engine control unit. A mass flow meter and a probe are also provided.
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公开(公告)号：US20230034399A1
公开(公告)日：2023-02-02
申请号：US17873374
申请日：2022-07-26
发明人： Risako MATSUDA , Keita SHOUJI , Kazuaki TAKAAI
摘要： A substrate processing system includes a chamber group including chambers configured to process a substrate in a desired process gas, a gas box group including gas boxes configured to supply the process gas to each of the chambers, a flow rate measuring device configured to measure a flow rate of the process gas supplied from the gas box group, and an exhaust device connected to the chamber group and the flow rate measuring device. The flow rate measuring device includes a measuring instrument and a measurement pipe connected to the gas box group and the measuring instrument and configured to flow the process gas through the gas box group and the measuring instrument. The measurement pipe includes branch pipes connected to each of the gas boxes, a main pipe connected to each of the branch pipes and the measuring instrument, and branch pipe valves provided in the branch pipes.
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公开(公告)号：US20220373371A1
公开(公告)日：2022-11-24
申请号：US17754605
申请日：2020-09-18
发明人： Peter Tschabold
摘要： The method comprises producing a measurement signal (s1) having a signal parameter, followed with a temporal change (Δx1/Δt; Δx1′/Δt) of a primary measured variable (x1) and a temporal change (Δy1/Δt) of a disturbing variable (Δ1), and producing a measurement signal (s2) having a signal parameter, followed by a temporal change (Δx2/Δt; Δx2′/Δt) of a primary measured variable (x2). The method comprises ascertaining measured values (XI) of first type representing the primary measured variable (x1) or a secondary measured variable (f(x1) Δx1′) of measured values (XII) of second type representing the primary measured variable (x2) or a secondary measured variable (f(x2) Δx2′). The method comprises using measured values (XI) of first type and measured values (XII) of second type for ascertaining an error characterizing number (Err) representing a velocity error (ΔXI/ΔXII) caused by a change of the disturbing variable (y1).
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公开(公告)号：US11340105B2
公开(公告)日：2022-05-24
申请号：US16369983
申请日：2019-03-29
申请人： Dresser, LLC
IPC分类号： G01F23/24 , G01F23/34 , G01F23/22 , G01F23/00 , G01F1/84 , G01N11/16 , G05B19/042 , G01N9/00 , G01F1/50 , G01L27/00
摘要： A method that configures a liquid-level transmitter device to generate a measured value for a level of a liquid. The method includes steps to correct for changes in physical properties of one or more components of the device. In one embodiment, the method utilizes a correction value that incorporates data from a temperature sensor disposed inside of the device, for example, inside of the electronics member.
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公开(公告)号：US11047378B2
公开(公告)日：2021-06-29
申请号：US16040524
申请日：2018-07-19
摘要： A system includes a fluid pump and a first pressure sensor disposed on or near an inlet of the fluid pump. The system further includes a second pressure sensor disposed on or near an outlet of the fluid pump and a control system. The control system includes a processor configured to receive a first signal from the first pressure sensor. The processor is further configured to receive a second signal from the second pressure sensor, and to derive a pump slip measure based on the first signal and the second signal.
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公开(公告)号：US20210096013A1
公开(公告)日：2021-04-01
申请号：US17122078
申请日：2020-12-15
发明人： Bhushan Somani , Eric J. Redemann
IPC分类号： G01F15/02 , G01F1/50 , G01F15/14 , G01F1/42 , G01F15/00 , G05D7/06 , G01F1/40 , G01F1/48 , G01F1/692 , G01F1/88 , G01F25/00
摘要： A reference volume for use with pressure change flow rate measurement apparatus has an internal structure comprising elements with cross section and length comparable to the cross section and length of adjacent interstitial fluid regions. The reference volume may have one or more heat conduction elements exterior to and in good thermal contact with a corrosion resistant material that defines the internal fluid holding region.
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公开(公告)号：US10697813B2
公开(公告)日：2020-06-30
申请号：US16346629
申请日：2017-10-27
摘要： Microwave measuring arrangement for determining loading two-phase flow with gaseous carrier medium in tube of channel system (1) with small solid and/or liquid particles. Microwaves with frequencies between 0.95 and 1.05 times the frequency of waveguide fundamental wave, are coupled into an electrically conductive section of the tube/channel system (1), section being delimited by filed rods (4,4′) and acting as resonator, the shift in the resonant frequency of the resonator on account of loading of the medium with solid and/or liquid particles is determined. To suppress interference (reflected, diffracted and/or superimposed) in the tube/or channel system (1), two auxiliary field rods (6, 7 and 6′, 7′) assigned to each filed rod (4,4′) are provided, Auxiliary filed rods (6, 7 and 6′, 7) are arranged at an angle α with respect to the field rod (4, 4′) of α=+45°±10 and/or α=−45°±10° and/or α=+135°±10° and/or α=−135°±.
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公开(公告)号：US10578467B2
公开(公告)日：2020-03-03
申请号：US15567405
申请日：2016-04-15
摘要： A subsea flow meter assembly includes a pipe section extending in an axial direction and providing a flow path for a medium. At least four measuring ports are provided at different locations in the pipe section. A first assembly measures at least a differential pressure between a first and second ports and an absolute pressure at one of the ports. A second assembly measures a differential pressure between a third and a fourth ports, and an absolute pressure at one of the ports. A first measuring unit is used to take measurements of the differential pressure and the absolute pressure via the first sensor assembly. A second measuring unit is used to take measurements of the differential pressure and the absolute pressure via the second sensor assembly. An evaluation unit of each determines a flow rate of a flow of medium through the pipe section based on the measurements.
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公开(公告)号：US10578062B2
公开(公告)日：2020-03-03
申请号：US15404607
申请日：2017-01-12
摘要： A system, method and device for mass airflow sensor signal processing includes a microcontroller, a mass airflow sensor and an engine PCM. An analog-to-digital converter (ADC) converts a first output signal from the mass airflow sensor to a first VDC value. A digital-to-analog converter (DAC) converts a second VDC value to a second output signal associated with the mass airflow sensor. Transfer functions are obtained from a flow bench using the mass airflow sensor, performance air intake components, and stock air intake components. The microcontroller determines, from the first VDC value, a corresponding actual flow rate. From the actual flow rate, a corresponding stock VDC value is determined. The stock VDC value is then output to the DAC for conversion to the output second signal associated with the mass airflow sensor for communication to the engine PCM.
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公开(公告)号：US20190204128A1
公开(公告)日：2019-07-04
申请号：US16334316
申请日：2017-09-19
CPC分类号： G01F15/028 , G01F1/42 , G01F1/50 , G01F15/00 , G01F15/005 , G01F15/02 , G01F15/14 , G05D7/0635 , G05D7/0688
摘要： A self-correcting pressure-based mass flow control apparatus includes outlet pressure sensing to enable correction for non-ideal operating conditions. Further the mass flow control apparatus having a fluid pathway, a shutoff valve in the fluid pathway, a reference volume in the fluid pathway, a first pressure measuring sensor in fluid communication with the reference volume, a first temperature measuring sensor providing a temperature signal indicative of the fluid temperature within the reference volume, a proportional valve in the fluid pathway, and a second pressure measuring sensor in fluid communication with the fluid pathway.
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