WO2007065785A1 - Vorrichtung zur bestimmung eines massenstroms - Google Patents
Vorrichtung zur bestimmung eines massenstroms Download PDFInfo
- Publication number
- WO2007065785A1 WO2007065785A1 PCT/EP2006/068640 EP2006068640W WO2007065785A1 WO 2007065785 A1 WO2007065785 A1 WO 2007065785A1 EP 2006068640 W EP2006068640 W EP 2006068640W WO 2007065785 A1 WO2007065785 A1 WO 2007065785A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass flow
- sound
- flow
- temperature
- speed
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/02—Compensating or correcting for variations in pressure, density or temperature
- G01F15/04—Compensating or correcting for variations in pressure, density or temperature of gases to be measured
- G01F15/043—Compensating or correcting for variations in pressure, density or temperature of gases to be measured using electrical means
Definitions
- the invention relates to a device for determining a mass flow of a gas flowing in a flow channel, each with sound transducers arranged at the ends of a measuring section, to which an evaluation unit is connected, which uses the transit times of sound signals to determine the flow rate of the gas and the Determines the speed of sound and determines a total mass flow on the basis of the flow rate and on the basis of pressure and temperature.
- a device for determining a mass flow of a gas flowing in a flow channel, each with sound transducers arranged at the ends of a measuring section, to which an evaluation unit is connected, which uses the transit times of sound signals to determine the flow rate of the gas and the Determines the speed of sound and determines a total mass flow on the basis of the flow rate and on the basis of pressure and temperature.
- Such a device is known from US Pat. No. 4,754,650.
- the known device has two ultrasound transducers, which are arranged at the ends of a measuring section and are introduced on the wall of a flow channel. With the help of
- the flow rate of the gas flowing in the flow channel and the speed of sound of the sound signal in the gas can then be determined from the transit times.
- the average molecular weight of the gas flowing in the flow channel is determined from the determined speed of sound. This makes it possible to determine the mass flow of the gas flowing in the flow channel at a known pressure and at a known temperature.
- an installation unit with an ultrasonic flow meter is known from EP 0 477 419, which is provided in particular for measuring the air mass in a motor vehicle engine.
- This installation unit also comprises sound transducers arranged at the ends of a measuring section, with which the transit time of sound signals can be determined.
- the flow rate of the air flowing in the flow channel can then be determined from the transit time of the sound signals.
- the mass flow of the incoming air can then be determined.
- the sucked-in air always has a certain proportion of air humidity and thus of water mass.
- the invention has for its object to provide a device for determining the mass flow of a gas in the presence of another gas.
- the evaluation unit determines the flow rate based on the transit times of the sound signals and determines a total mass flow based on pressure and a temperature. Furthermore, the evaluation unit determines the speed of sound from the running times and uses this to determine a proportion of a further gas flowing in the flow channel. The evaluation unit is then able to correct the total mass flow to the mass flow of the gas.
- the device therefore does not require a separate sensor for the proportion of the further gas in the gas flow. Rather, the mass flow of the gas can also be determined in the presence of another gas, provided the pressure and temperature are known.
- the evaluation unit is connected to a temperature sensor and a pressure sensor, which provide the evaluation unit with current values for temperature and pressure. So that the device can also be operated with fluctuating pressure and temperature.
- the evaluation unit uses the speed of sound to determine the water content in an air flow and corrects the total mass flow to the mass flow of the air flow.
- the device is therefore particularly suitable for measuring the air mass flow in the intake tract of an internal combustion engine for a motor vehicle.
- Figure 1 is a block diagram for determining the mass flow in a flow channel
- FIG. 1 shows a measuring device 1 with which the air mass flow in an intake pipe 2 of the internal combustion engine of a motor vehicle can be determined.
- the measuring device 1 comprises ultrasound transducers 4 arranged in a wall 3 of the intake pipe 2, which define a measuring section 5.
- the measuring section 5 runs across the intake pipe 2 at an angle to a flow direction 6.
- the ultrasound transducers 4 are able to both transmit and receive ultrasound.
- the ultrasonic transducers 4 transmit and receive ultrasonic signals 7 in the direction of flow 6.
- Further ultrasonic signals 8 are transmitted and received against the direction of flow 6.
- a runtime measuring circuit 9 which follows the ultrasound transducers 4 determines runtimes t d and for the ultrasound signals 8 runtimes t u .
- the flow rate v of the gas in the intake pipe 2 is, apart from various interfering effects which can falsify the measurement result, proportional to ⁇ t / t u t d, where ⁇ t is the difference between the running times t u and t d .
- the speed of sound c of the gas in the intake pipe 2 is then proportional ⁇ t / tu t d where ⁇ t is the sum of the running times.
- the speed of sound c is determined in an arithmetic unit 10 downstream of the transit time measuring circuit 9 and the flow rate v in a further arithmetic unit 11 downstream of the transit time measuring circuit 9.
- a temperature sensor 12 with a downstream temperature measurement circuit 13 and a pressure sensor 14 with a downstream pressure measurement circuit 15 are also arranged on the intake pipe 2.
- the measured values for temperature T and pressure p supplied by the temperature measuring circuit 13 and the pressure measuring circuit 15 can be used in a computing unit 16 arranged downstream of the arithmetic unit 11 to determine a total mass flow. Since the total pressure is made up of the partial pressure of the air and the partial pressure of the water vapor, the total mass flow is not equal to the air mass flow. Rather, the total mass flow must be corrected with regard to the water vapor mass flow.
- the mass fraction of water vapor in the total mass flow is determined in a further arithmetic unit 17 on the basis of the speed of sound c determined in the arithmetic unit 10 and the measured value for the temperature provided by the temperature measuring circuit 13, and in a further arithmetic unit 18 the total mass flow to the mass flow of air corrected.
- the value for the air mass flow can then be transferred to an output 19 of an engine control.
- the measured value of the air humidity can be passed on to the engine control in a further output 20.
- the transit time measuring circuit 9, the temperature measuring circuit 13, the pressure measuring circuit 15 and the arithmetic units 10, 11 and 16 to 18 form an evaluation unit 21 which can be integrated into a physical device or can also be distributed over several physical devices.
- the function of the arithmetic units 10, 11 and 17 to 18 can also be done with the help of software based on a
- Microprocessor of the evaluation unit 21 runs, be accomplished.
- the runtime measuring circuit 9, the temperature measuring circuit 13, pressure measuring circuit 15 and the arithmetic units 10, 11 and 16 to 18 represent functional units which can be set up using software or hardware.
- the measuring device 1 can significantly influence the measurement result, in particular in the temperature range above 10 ° C. This will be explained in more detail with reference to FIG. 2.
- FIG. 2 shows a diagram in which the dependence of the speed of sound c in air as a function of the relative air humidity p is entered.
- the air mass flow drawn in by an internal combustion engine can be determined.
- a gas mixture comprising two main components is present and the mass flow of one of the two main components is to be determined.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06819596A EP1957945A1 (de) | 2005-12-08 | 2006-11-20 | Vorrichtung zur bestimmung eines massenstroms |
US12/086,300 US8047082B2 (en) | 2005-12-08 | 2006-11-20 | Device for determining a mass flow of a first gas within an overall mixture of gases |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005059062.4 | 2005-12-08 | ||
DE102005059062A DE102005059062B4 (de) | 2005-12-08 | 2005-12-08 | Vorrichtung zur Bestimmung eines Massenstroms |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007065785A1 true WO2007065785A1 (de) | 2007-06-14 |
Family
ID=37885839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2006/068640 WO2007065785A1 (de) | 2005-12-08 | 2006-11-20 | Vorrichtung zur bestimmung eines massenstroms |
Country Status (6)
Country | Link |
---|---|
US (1) | US8047082B2 (de) |
EP (1) | EP1957945A1 (de) |
KR (1) | KR20080080506A (de) |
CN (1) | CN101326427A (de) |
DE (1) | DE102005059062B4 (de) |
WO (1) | WO2007065785A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107430022A (zh) * | 2015-03-13 | 2017-12-01 | 高准公司 | 振动计量仪中的信号的温度补偿 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011080365A1 (de) | 2011-08-03 | 2013-02-07 | Endress + Hauser Flowtec Ag | Verfahren zum Ermitteln des Durchflusses mittels Ultraschall |
RU2585308C2 (ru) * | 2012-02-07 | 2016-05-27 | Закрытое Акционерное Общество "Когерент" | Способ прохождения сигналов через контролируемую среду |
JP6307065B2 (ja) | 2012-04-05 | 2018-04-04 | フィッシャー アンド ペイケル ヘルスケア リミテッド | 呼吸補助装置 |
US8974114B2 (en) * | 2012-05-02 | 2015-03-10 | Daniel Measurement And Control, Inc. | Temperature verification for ultrasonic flow meters |
DE102012209050B3 (de) * | 2012-05-30 | 2013-05-29 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Bestimmung einer Fahrtwindgeschwindigkeit |
US9746360B2 (en) | 2014-03-13 | 2017-08-29 | Siemens Energy, Inc. | Nonintrusive performance measurement of a gas turbine engine in real time |
US9752959B2 (en) * | 2014-03-13 | 2017-09-05 | Siemens Energy, Inc. | Nonintrusive transceiver and method for characterizing temperature and velocity fields in a gas turbine combustor |
EP3148624B1 (de) | 2014-05-27 | 2023-06-28 | Fisher & Paykel Healthcare Limited | Gasmischung und -messung für eine medizinische vorrichtung |
DE102014009581A1 (de) * | 2014-07-01 | 2016-01-07 | Krohne Messtechnik Gmbh | Ultraschall-Durchflussmessgerät und Verfahren zum Betreiben eines Ultraschall-Durchflussmessgerätes |
SG10202005175TA (en) * | 2015-12-02 | 2020-07-29 | Fisher & Paykel Healthcare Ltd | Flow path sensing for flow therapy apparatus |
DE102016218278A1 (de) * | 2016-09-22 | 2018-03-22 | Robert Bosch Gmbh | Funktionsüberwachung von Magnetventilen für Kraftstoffeinspritzsysteme |
JP7012497B2 (ja) * | 2017-10-04 | 2022-01-28 | 上田日本無線株式会社 | 伝搬時間測定装置、気体濃度測定装置および伝搬時間測定プログラム |
CN113558659B (zh) * | 2021-07-30 | 2023-07-04 | 重庆安酷科技有限公司 | 一种高精度超声波肺功能检测仪及其检测方法 |
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CH555473A (de) * | 1973-05-15 | 1974-10-31 | Autoelektronik Ag | Vergasereinrichtung fuer ottomotoren. |
US5247826A (en) * | 1992-11-12 | 1993-09-28 | Devilbiss Health Care, Inc. | Gas concentration and/or flow sensor |
WO1995018958A1 (de) * | 1994-01-10 | 1995-07-13 | Siemens Aktiengesellschaft | Verfahren zur bestimmung des volumenflusses eines gases in einem messrohr |
DE4442078A1 (de) * | 1994-11-25 | 1996-05-30 | Siemens Ag | Verfahren zur Messung der Temperatur eines Fluids in einem Meßrohr |
US6487916B1 (en) * | 2000-02-02 | 2002-12-03 | Bechtel Bxwt Idaho, Llc | Ultrasonic flow metering system |
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DE3312092A1 (de) * | 1983-04-02 | 1984-10-04 | Volkswagenwerk Ag, 3180 Wolfsburg | Anordnung zur bestimmung des durchsatzes eines mediums, insbesondere des luftdurchsatzes durch eine lufteinlassleitung einer brennkraftmaschine |
US4754650A (en) * | 1983-07-29 | 1988-07-05 | Panametrics, Inc. | Apparatus and methods for measuring fluid flow parameters |
ES2021314B3 (es) * | 1986-09-30 | 1991-11-01 | Siemens Ag | Procedimiento de diferencia de fases de ultrasonidos, para la medicion de velocidades de caudal alta |
DE4011526A1 (de) * | 1990-04-10 | 1991-10-17 | Bosch Gmbh Robert | Vorrichtung zur ultraschall-durchflussmessung von stroemenden medien |
EP0477419A1 (de) * | 1990-09-28 | 1992-04-01 | Siemens Aktiengesellschaft | Ultraschall (US)-Durchflussmesser-Einbaueinheit zum Einbauen in ein Messrohr |
EP0533980A1 (de) * | 1991-09-26 | 1993-03-31 | Siemens Aktiengesellschaft | Verfahren zur Bestimmung der Konzentration von Kraftstoffen oder Gasen in Luft |
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DE4343855C2 (de) * | 1993-12-22 | 1995-10-26 | Samson Ag | Verfahren zur Zustandsbestimmung eines Fluides, insbesondere eines im wesentlichen gasförmigen Mediums |
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DE10228497B4 (de) * | 2002-06-21 | 2012-01-26 | Nicolay Verwaltungs-Gmbh | Verfahren und Vorrichtung zum Ermitteln eines Anteils eines für die Stoffwechselfunktion eines atmenden Lebewesens charakteristischen Bestandteils in der von dem Lebewesen ausgeatmeten Luft |
DE102005038599A1 (de) * | 2005-08-16 | 2007-02-22 | Robert Bosch Gmbh | Ultraschallmesseinheit mit integrierter Feuchteermittlung |
US8346491B2 (en) * | 2007-02-23 | 2013-01-01 | Expro Meters, Inc. | Sonar-based flow meter operable to provide product identification |
-
2005
- 2005-12-08 DE DE102005059062A patent/DE102005059062B4/de not_active Expired - Fee Related
-
2006
- 2006-11-20 CN CNA200680046182XA patent/CN101326427A/zh active Pending
- 2006-11-20 WO PCT/EP2006/068640 patent/WO2007065785A1/de active Application Filing
- 2006-11-20 KR KR1020087012513A patent/KR20080080506A/ko not_active Application Discontinuation
- 2006-11-20 US US12/086,300 patent/US8047082B2/en not_active Expired - Fee Related
- 2006-11-20 EP EP06819596A patent/EP1957945A1/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH555473A (de) * | 1973-05-15 | 1974-10-31 | Autoelektronik Ag | Vergasereinrichtung fuer ottomotoren. |
US5247826A (en) * | 1992-11-12 | 1993-09-28 | Devilbiss Health Care, Inc. | Gas concentration and/or flow sensor |
US5247826B1 (en) * | 1992-11-12 | 1995-07-18 | Devilbiss Health Care Inc | Gas concentration and/or flow sensor |
WO1995018958A1 (de) * | 1994-01-10 | 1995-07-13 | Siemens Aktiengesellschaft | Verfahren zur bestimmung des volumenflusses eines gases in einem messrohr |
DE4442078A1 (de) * | 1994-11-25 | 1996-05-30 | Siemens Ag | Verfahren zur Messung der Temperatur eines Fluids in einem Meßrohr |
US6487916B1 (en) * | 2000-02-02 | 2002-12-03 | Bechtel Bxwt Idaho, Llc | Ultrasonic flow metering system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107430022A (zh) * | 2015-03-13 | 2017-12-01 | 高准公司 | 振动计量仪中的信号的温度补偿 |
CN107430022B (zh) * | 2015-03-13 | 2021-02-09 | 高准公司 | 振动计量仪中的信号的温度补偿 |
Also Published As
Publication number | Publication date |
---|---|
US8047082B2 (en) | 2011-11-01 |
EP1957945A1 (de) | 2008-08-20 |
DE102005059062B4 (de) | 2009-08-27 |
DE102005059062A1 (de) | 2007-06-14 |
KR20080080506A (ko) | 2008-09-04 |
CN101326427A (zh) | 2008-12-17 |
US20090249888A1 (en) | 2009-10-08 |
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