SE9701477L - Measuring device for simultaneous determination of flow of a flowing gas mixture and concentration of a specific gas in the gas mixture. - Google Patents

Measuring device for simultaneous determination of flow of a flowing gas mixture and concentration of a specific gas in the gas mixture.

Info

Publication number
SE9701477L
SE9701477L SE9701477A SE9701477A SE9701477L SE 9701477 L SE9701477 L SE 9701477L SE 9701477 A SE9701477 A SE 9701477A SE 9701477 A SE9701477 A SE 9701477A SE 9701477 L SE9701477 L SE 9701477L
Authority
SE
Sweden
Prior art keywords
flow
gas
gas mixture
concentration
mixture
Prior art date
Application number
SE9701477A
Other languages
Swedish (sv)
Other versions
SE9701477D0 (en
SE508439C2 (en
Inventor
Lars Wallen
Rolf Castor
Original Assignee
Siemens Elema Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Elema Ab filed Critical Siemens Elema Ab
Priority to SE9701477A priority Critical patent/SE9701477L/en
Publication of SE9701477D0 publication Critical patent/SE9701477D0/en
Priority to EP98104172A priority patent/EP0874238A1/en
Publication of SE508439C2 publication Critical patent/SE508439C2/en
Publication of SE9701477L publication Critical patent/SE9701477L/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/087—Measuring breath flow
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/082—Evaluation by breath analysis, e.g. determination of the chemical composition of exhaled breath
    • 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
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/083—Measuring rate of metabolism by using breath test, e.g. measuring rate of oxygen consumption
    • A61B5/0836—Measuring rate of CO2 production
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/01—Indexing codes associated with the measuring variable
    • G01N2291/015—Attenuation, scattering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/021—Gases
    • G01N2291/0215—Mixtures of three or more gases, e.g. air
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02809—Concentration of a compound, e.g. measured by a surface mass change

Abstract

A device for simultaneously measuring the flow of a gas mixture and a concentration of a specific gas in the mixture comprises a measuring chamber through which the mixture can flow, an acoustic transmitter (26) which generates and emits an acoustic signal that passes through the chamber, an acoustic receiver (28) for measuring the transmitted acoustic signal, and a first processor (36) linked to the receiver for determining the flow of gas through the chamber, based on the effect that the flow has on the acoustic signal. A second processor (38) is linked to the receiver for determining the concentration of the specific gas in the mixture, based on the effect of this gas on the signal. Preferably the second processor is used to measure carbon dioxide content.
SE9701477A 1997-04-21 1997-04-21 Measuring device for simultaneous determination of flow of a flowing gas mixture and concentration of a specific gas in the gas mixture. SE9701477L (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9701477A SE9701477L (en) 1997-04-21 1997-04-21 Measuring device for simultaneous determination of flow of a flowing gas mixture and concentration of a specific gas in the gas mixture.
EP98104172A EP0874238A1 (en) 1997-04-21 1998-03-09 A measuring device for simultaneous determination of the flow in a circulating gasmixture and the concentration of a specific gas in the gas mixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9701477A SE9701477L (en) 1997-04-21 1997-04-21 Measuring device for simultaneous determination of flow of a flowing gas mixture and concentration of a specific gas in the gas mixture.

Publications (3)

Publication Number Publication Date
SE9701477D0 SE9701477D0 (en) 1997-04-21
SE508439C2 SE508439C2 (en) 1998-10-05
SE9701477L true SE9701477L (en) 1998-10-05

Family

ID=20406649

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9701477A SE9701477L (en) 1997-04-21 1997-04-21 Measuring device for simultaneous determination of flow of a flowing gas mixture and concentration of a specific gas in the gas mixture.

Country Status (2)

Country Link
EP (1) EP0874238A1 (en)
SE (1) SE9701477L (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9801007D0 (en) * 1998-03-25 1998-03-25 Siemens Elema Ab Device for measuring a gas flow
CA2351639A1 (en) * 1998-11-17 2000-05-25 James R. Mault Method and apparatus for the non-invasive determination of cardiac output
SE9903192D0 (en) * 1999-09-09 1999-09-09 Siemens Elema Ab Procedure for determination of gas content
DE102008060922A1 (en) * 2008-12-06 2010-06-10 Ganshorn Medizin Electronic Gmbh Lung diagnostic device with two ultrasonic measuring sections
US8752544B2 (en) 2011-03-21 2014-06-17 General Electric Company Medical vaporizer and method of monitoring of a medical vaporizer
US10610659B2 (en) 2017-03-23 2020-04-07 General Electric Company Gas mixer incorporating sensors for measuring flow and concentration
US10946160B2 (en) 2017-03-23 2021-03-16 General Electric Company Medical vaporizer with carrier gas characterization, measurement, and/or compensation
US10847177B2 (en) 2018-10-11 2020-11-24 Cordio Medical Ltd. Estimating lung volume by speech analysis
US11011188B2 (en) 2019-03-12 2021-05-18 Cordio Medical Ltd. Diagnostic techniques based on speech-sample alignment
US11024327B2 (en) 2019-03-12 2021-06-01 Cordio Medical Ltd. Diagnostic techniques based on speech models
US11484211B2 (en) 2020-03-03 2022-11-01 Cordio Medical Ltd. Diagnosis of medical conditions using voice recordings and auscultation
US11417342B2 (en) 2020-06-29 2022-08-16 Cordio Medical Ltd. Synthesizing patient-specific speech models
US20220165295A1 (en) * 2020-11-23 2022-05-26 Cordio Medical Ltd. Detecting impaired physiological function by speech analysis

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4754650A (en) * 1983-07-29 1988-07-05 Panametrics, Inc. Apparatus and methods for measuring fluid flow parameters
JPS60117131A (en) * 1983-11-30 1985-06-24 Toshiba Corp Measuring tube for simultaneously measuring flow rate and concentration of fluid
FR2634557A1 (en) * 1988-07-22 1990-01-26 Pluss Stauffer Ag DEVICE AND METHOD FOR SIMULTANEOUSLY MEASURING IN A CONDUIT, DENSITY, CONCENTRATION, FLOW SPEED, FLOW AND TEMPERATURE OF A LIQUID OR PASTY FLUID BY ULTRASONIC TRANSMISSION
US5060514A (en) * 1989-11-30 1991-10-29 Puritan-Bennett Corporate Ultrasonic gas measuring device
US5343760A (en) * 1992-07-09 1994-09-06 General Motors Corporation Gas concentration and flow rate sensor
TW295258U (en) * 1992-10-06 1997-01-01 Caldon Inc Apparatus for determining fluid flow
EP0646346A3 (en) * 1993-09-30 1998-06-17 NDD Medizintechnik GmbH Device for measuring respiratory gas parameters

Also Published As

Publication number Publication date
SE9701477D0 (en) 1997-04-21
EP0874238A1 (en) 1998-10-28
SE508439C2 (en) 1998-10-05

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