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公开(公告)号：US11467015B2
公开(公告)日：2022-10-11
申请号：US17287871
申请日：2019-11-19
申请人： Hitachi Astemo, Ltd.
发明人： Yuki Isoya , Hiroaki Hoshika
摘要： Provided is a physical quantity measurement device capable of reducing a frequency analysis error of a gas flow rate as compared with the related art. A physical quantity measurement device 20 includes a flow rate sensor 205 and a signal processing unit 260. The signal processing unit 260 has a buffer 261, an offset adjustment unit 262, a gain calculation unit 263, a correction calculation unit 264, and a frequency analysis unit 265. The buffer 261 stores a flow rate data based on an output signal of the flow rate sensor 205 for a predetermined period. The offset adjustment unit 262 adjusts the zero point of the flow rate waveform. The gain calculation unit 263 calculates a correction gain of the flow rate waveform whose zero point has been adjusted. The correction calculation unit 264 performs the correction by multiplying the flow rate waveform whose zero point has been adjusted by the correction gain. The frequency analysis unit 265 performs a frequency analysis calculation of the corrected flow rate waveform and stores the data obtained by the calculation in the buffer 261. The gain calculation unit 263 calculates the correction gain at which the overflow does not occur in the frequency analysis unit 265.
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公开(公告)号：US20220291036A1
公开(公告)日：2022-09-15
申请号：US17198615
申请日：2021-03-11
发明人： Tobias Meimberg , Ralf Schroeder genannt Berghegger , Christian Lampe-Juergens , Andreas Wuchrer
摘要： A system includes a flow tube configured to receive a flow measured by an ultrasonic flow measurement, wherein a center region of the flow tube is configured to have a drop in pressure. The system also includes a heat source/hot wire and temperature sensors configured to enable a flow measured by a thermal massflow measurement. In the system, a controller is configured to compare the flow measured by the ultrasonic flow measurement to the flow measured by the thermal massflow measurement. The controller determines a ratio of the flow measured by an ultrasonic flow measurement to the flow measured on by the flow measurement based on thermal massflow. The controller also calculates a density, a thermal conductivity and an energy and/or gas content of the gas.
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公开(公告)号：US20220276083A1
公开(公告)日：2022-09-01
申请号：US17682938
申请日：2022-02-28
申请人： BEPIS, Inc.
发明人： Jesse Jenter
IPC分类号： G01F15/063 , G01F1/696
摘要： A flow metering system is generally presented herein. The flow metering system is generally configured to measure liquid flow from a liquid dispensing system and to track volume change and other measurable characteristics of the liquid in real time. The flow metering system may include a flow sensor. The flow sensor may be positioned in line with a liquid flow line, or in a separate line where the remainder of the liquid exits via a bypass, where the liquid flow line is connected to and configured to dispense liquid from a pre-packaged liquid volume, or a reservoir. For example, the flow sensor may be connected in-line to a beer line, such as vinyl piping, for a beer keg or soda dispensing tank. However, it will be appreciated that the flow metering system may be used with any type of liquid dispensing system.
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公开(公告)号：US20220214198A1
公开(公告)日：2022-07-07
申请号：US17595331
申请日：2020-06-09
申请人： Hitachi Astemo, Ltd.
发明人： Akira UENODAN , Nobuaki GARAI , Shigeto HIROHATA , Naoki SAITO , Takahiro MIKI
摘要： An object is to improve measurement accuracy of a flow rate measurement device. A flow rate measurement device including: a first void which is formed of one surface of the support body and one surface of the circuit board; a second void which is formed of a surface opposite to the one surface of the circuit board and the housing; and a third void which is formed of a surface opposite to the one surface of the support body and a cover.
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公开(公告)号：US11365699B2
公开(公告)日：2022-06-21
申请号：US17257782
申请日：2019-09-06
IPC分类号： F02D41/22 , F02D41/00 , G01F1/69 , G01F5/00 , G01L13/00 , F02D41/18 , G01F1/696 , F02D41/28 , G01F15/04 , G01F1/72
摘要： Provided is an internal combustion engine control device capable of more appropriately correcting an output value of a flow rate sensor that measures a flow rate of air flowing through an intake flow path of an internal combustion engine, and further reducing an error between a corrected air flow rate and an actual air flow rate as compared to a conventional device. For this purpose, the internal combustion engine control device of the present invention includes an arithmetic device 100 including a fundamental frequency derivation unit 104 that derives a fundamental frequency, a flow rate amplitude calculation unit 107 that extracts a radio frequency of a plurality of frequencies equal to or higher than the fundamental frequency from a pulsation waveform based on the output value of the flow rate sensor as a flow rate radio frequency and calculates an amplitude of the flow rate radio frequency for each frequency, a correction amount derivation unit 108 that derives a correction amount based on the amplitude of the flow rate radio frequency for each frequency, and a flow rate calculation unit 109 that calculates a flow rate of air by using the output value of the flow rate sensor and the correction amount.
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公开(公告)号：US20220146292A1
公开(公告)日：2022-05-12
申请号：US17090990
申请日：2020-11-06
摘要： Methods and apparatuses associated with flow sensing devices are provided. An example flow sensing device includes a flow cap component and a sensor component. The flow cap component or sensor component may include a heating element. The flow cap component can at least partially define a flow channel configured for a media to flow therethrough. The heater element may be orthogonal or perpendicular to the flow channel. The sensor component may include at least one thermal sensing element disposed upstream of the heater element and at least one thermal sensing element disposed downstream of the heater element. The sensor component may include two or more thermal sensing elements disposed in either the upstream direction or downstream direction of the heater element. Thermal sensing elements may be spaced different distances from the heater element to increase the accuracy and precision of flow rate measurement at low flow rates.
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公开(公告)号：US11307073B2
公开(公告)日：2022-04-19
申请号：US16606190
申请日：2018-04-18
发明人： Dimitri Tainoff , Olivier Bourgeois
摘要： A device for measuring the speed or flow of a gas at a temperature different from an ambient temperature is provided, which includes: a first platform suspended by first arms above a support designed to be kept at an ambient temperature, the first arms comprising thermoelectric strips designed to supply a first voltage based on the difference between the temperatures of the first platform and the support; and a processing unit designed to supply the speed or flow measurement on the basis of the first voltage, the gas temperature and the ambient temperature.
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公开(公告)号：US11274621B2
公开(公告)日：2022-03-15
申请号：US17090955
申请日：2020-11-06
申请人： DENSO CORPORATION
发明人： Kengo Ito
摘要： An air flow measurement device that measures an air flow rate based on an output value of a sensing unit attached in an environment in which air flows, the air flow measurement device is provided. The air flow measurement device may calculate an average air amount, which is an average value of the air flow rate, from the output value. The air flow measurement device may calculate a pulsation maximum value, which is a maximum value of the air flow rate, from the output value.
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公开(公告)号：US11268839B2
公开(公告)日：2022-03-08
申请号：US16734359
申请日：2020-01-05
发明人： Omar Abed , Gertjan van Sprakelaar , Justin Gaynor
摘要： Reliable flow sensors with enclosures that have predictable thermal variations and reduced mechanical tolerances for a more consistent fluid flow and more consistent flow measurements. Thermal variations can be made predictable by using etched structures in silicon blocks. Mechanical tolerances can be reduced using lithography and high-precision semiconductor manufacturing equipment and techniques.
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公开(公告)号：US11248942B2
公开(公告)日：2022-02-15
申请号：US16968312
申请日：2019-01-18
申请人： OMRON CORPORATION
发明人： Katsuyuki Yamamoto , Naotsugu Ueda
IPC分类号： G01F1/696
摘要： The flow rate measuring apparatus according to one aspect of the present invention is a flow rate measuring apparatus that intermittently measures the flow rate of a fluid, comprising a heating unit for heating the fluid; a control unit that controls a drive voltage for driving the heating unit, or the interval at which the drive voltage is applied, to the desired value; a temperature sensing unit that senses information about the temperature of the heated fluid; and a flow rate measurement unit that measures the flow rate of the fluid on the basis of the sensing signal outputted from the temperature sensing unit, wherein, in intermittently measuring the flow rate, the control unit varies the heating amount of the heating unit in each measurement by varying the interval at which the drive voltage is applied.
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