WO2001018496A3 - Several gas flow measuring devices and signal processing methods - Google Patents

Several gas flow measuring devices and signal processing methods Download PDF

Info

Publication number
WO2001018496A3
WO2001018496A3 PCT/CA2000/001026 CA0001026W WO0118496A3 WO 2001018496 A3 WO2001018496 A3 WO 2001018496A3 CA 0001026 W CA0001026 W CA 0001026W WO 0118496 A3 WO0118496 A3 WO 0118496A3
Authority
WO
WIPO (PCT)
Prior art keywords
flow
gas flow
accentuated
adc
flow tube
Prior art date
Application number
PCT/CA2000/001026
Other languages
French (fr)
Other versions
WO2001018496A2 (en
Inventor
Oleg Grudin
Alexander Gendin
Gennadiy Frolov
Original Assignee
Microbridge Technologies Inc
Oleg Grudin
Alexander Gendin
Gennadiy Frolov
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 Microbridge Technologies Inc, Oleg Grudin, Alexander Gendin, Gennadiy Frolov filed Critical Microbridge Technologies Inc
Priority to KR10-2003-7003190A priority Critical patent/KR20030043951A/en
Priority to CA002422398A priority patent/CA2422398A1/en
Priority to JP2001522038A priority patent/JP2003529051A/en
Priority to AU2000269752A priority patent/AU2000269752A1/en
Priority to EP00958063A priority patent/EP1315948A2/en
Publication of WO2001018496A2 publication Critical patent/WO2001018496A2/en
Publication of WO2001018496A3 publication Critical patent/WO2001018496A3/en

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
    • G01F1/05—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 using mechanical effects
    • G01F1/34—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 using mechanical effects by measuring pressure or differential pressure
    • 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
    • A61B5/0878—Measuring breath flow using temperature sensing means
    • 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
    • G01F1/05—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 using mechanical effects
    • G01F1/34—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 using mechanical effects by measuring pressure or differential pressure
    • G01F1/36—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 using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
    • G01F1/40—Details of construction of the flow constriction devices
    • G01F1/42—Orifices or nozzles
    • 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
    • G01F1/68—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 using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow

Abstract

A gas flow receiver has a non-symmetrical-flow-inducing diaphragm mounted in a flow tube and causes non-symmetrical flow in the flow tube with an accentuated higher pressure near an upstream orifice than would be sensed in a corresponding cross-section of the flow tube and an accentuated lower pressure near a downstream orifice. A gas flowmeter using thermoanemometer-type transducers receiving gas flow from the upstream orifice is made immune to vibration or acceleration by arranging a pair of the transducers parallel to one another with the gas flow passing serially through them, but in opposite directions. The transducer output is amplified by a noisy amplifier which injects a secondary signal prior to digital conversion using an ADC. The digital signal is averaged over a sampling period to obtain a sample having a level of precision greater than a minimum quantization value of the ADC.
PCT/CA2000/001026 1999-09-03 2000-09-01 Several gas flow measuring devices and signal processing methods WO2001018496A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR10-2003-7003190A KR20030043951A (en) 1999-09-03 2000-09-01 Several gas flow measuring devices and signal processing methods
CA002422398A CA2422398A1 (en) 1999-09-03 2000-09-01 Several gas flow measuring devices and signal processing methods
JP2001522038A JP2003529051A (en) 1999-09-03 2000-09-01 Gas flow measuring device and signal processing method applicable thereto
AU2000269752A AU2000269752A1 (en) 1999-09-03 2000-09-01 Several gas flow measuring devices and signal processing methods
EP00958063A EP1315948A2 (en) 1999-09-03 2000-09-01 Several gas flow measuring devices and signal processing methods

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US15246199P 1999-09-03 1999-09-03
US15246499P 1999-09-03 1999-09-03
US15246099P 1999-09-03 1999-09-03
US15248799P 1999-09-03 1999-09-03
US60/152,461 1999-09-03
US60/152,487 1999-09-03
US60/152,464 1999-09-03
US60/152,460 1999-09-03

Publications (2)

Publication Number Publication Date
WO2001018496A2 WO2001018496A2 (en) 2001-03-15
WO2001018496A3 true WO2001018496A3 (en) 2002-09-12

Family

ID=27496022

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2000/001026 WO2001018496A2 (en) 1999-09-03 2000-09-01 Several gas flow measuring devices and signal processing methods

Country Status (6)

Country Link
EP (1) EP1315948A2 (en)
JP (1) JP2003529051A (en)
KR (1) KR20030043951A (en)
AU (1) AU2000269752A1 (en)
CA (1) CA2422398A1 (en)
WO (1) WO2001018496A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103838261B (en) * 2001-10-12 2017-05-03 霍里巴斯特克公司 System and method for making and using a mass flow device
US20050039809A1 (en) * 2003-08-21 2005-02-24 Speldrich Jamie W. Flow sensor with integrated delta P flow restrictor
US9974465B2 (en) 2007-01-04 2018-05-22 Oridion Medical 1987 Ltd. Capnography device and method
JP6434419B2 (en) 2012-11-30 2018-12-05 インペリアル イノベ−ションズ リミテッド Apparatus, method and system for monitoring a fluid delivery conduit network
JP6401717B2 (en) 2013-02-08 2018-10-10 プロフタガレン アクチエボラグＰｒｏｖｔａｇａｒｅｎ Ａｂ Improved differential thermal mass flow meter assembly and method of measuring mass flow using the mass flow meter assembly
EP3304008B1 (en) * 2015-06-04 2020-03-04 Fluid Handling LLC. Contoured insert for flow verification
US11890089B1 (en) 2015-07-28 2024-02-06 Thorasys Thoracic Medical Systems Inc. Flowmeter for airway resistance measurements
CN108802418B (en) * 2018-08-23 2023-09-15 安徽启源智能科技有限公司 Filter tank back flush tester and test system
CN109341786B (en) * 2018-12-04 2023-10-27 东北林业大学 Automobile air flow sensor
EP3933352A1 (en) * 2020-07-01 2022-01-05 Sick Ag Thermal flow measurement
CN113171986A (en) * 2021-05-19 2021-07-27 四川中烟工业有限责任公司 Method for automatically controlling stem removing amount of air separator

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083244A (en) * 1975-11-24 1978-04-11 Agar Instrumentation Incorporated Method and apparatus for measuring fluid flow and/or for exercising a control in dependence thereon
US4083245A (en) * 1977-03-21 1978-04-11 Research Development Corporation Variable orifice gas flow sensing head
EP0037259A1 (en) * 1980-03-27 1981-10-07 Victor Company Of Japan, Limited Circuit arrangement and method for reducing quantization distortion in a signal processing device
EP0068604A2 (en) * 1981-04-24 1983-01-05 Peter Caleb Frederick Wolfendale Improvements in transducers
US4996871A (en) * 1989-06-02 1991-03-05 Micro Motion, Inc. Coriolis densimeter having substantially increased noise immunity
US5186056A (en) * 1989-05-08 1993-02-16 Lew Hyok S Vortex flowmeter with dual vortex sensors
DE4238149A1 (en) * 1992-11-12 1994-05-19 Meissner & Wurst Press. monitoring arrangement, esp. for clean room areas - contains thermal anemometers in flow channel with separating flow obstruction, and signal processor
EP0629862A1 (en) * 1993-06-18 1994-12-21 Siemens Aktiengesellschaft Apparatus for measuring a radial flow of a gas or a fluid using a Wheatstone bridge of four temperature dependent resistors
JPH10122921A (en) * 1996-10-22 1998-05-15 Nippon Koden Corp Flow sensor
EP0890828A1 (en) * 1997-07-08 1999-01-13 Emerson Electric Co. Method and apparatus for detecting and controlling mass flow

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083244A (en) * 1975-11-24 1978-04-11 Agar Instrumentation Incorporated Method and apparatus for measuring fluid flow and/or for exercising a control in dependence thereon
US4083245A (en) * 1977-03-21 1978-04-11 Research Development Corporation Variable orifice gas flow sensing head
EP0037259A1 (en) * 1980-03-27 1981-10-07 Victor Company Of Japan, Limited Circuit arrangement and method for reducing quantization distortion in a signal processing device
EP0068604A2 (en) * 1981-04-24 1983-01-05 Peter Caleb Frederick Wolfendale Improvements in transducers
US5186056A (en) * 1989-05-08 1993-02-16 Lew Hyok S Vortex flowmeter with dual vortex sensors
US4996871A (en) * 1989-06-02 1991-03-05 Micro Motion, Inc. Coriolis densimeter having substantially increased noise immunity
DE4238149A1 (en) * 1992-11-12 1994-05-19 Meissner & Wurst Press. monitoring arrangement, esp. for clean room areas - contains thermal anemometers in flow channel with separating flow obstruction, and signal processor
EP0629862A1 (en) * 1993-06-18 1994-12-21 Siemens Aktiengesellschaft Apparatus for measuring a radial flow of a gas or a fluid using a Wheatstone bridge of four temperature dependent resistors
JPH10122921A (en) * 1996-10-22 1998-05-15 Nippon Koden Corp Flow sensor
US5979247A (en) * 1996-10-22 1999-11-09 Nihon Kohden Corporation Flow sensor having a fixed resistance and a variable resistance
EP0890828A1 (en) * 1997-07-08 1999-01-13 Emerson Electric Co. Method and apparatus for detecting and controlling mass flow

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 10 31 August 1998 (1998-08-31) *

Also Published As

Publication number Publication date
AU2000269752A1 (en) 2001-04-10
EP1315948A2 (en) 2003-06-04
WO2001018496A2 (en) 2001-03-15
JP2003529051A (en) 2003-09-30
AU2000269752A8 (en) 2001-06-07
KR20030043951A (en) 2003-06-02
CA2422398A1 (en) 2001-03-15

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