DE2227067A1 - Spirometer und verfahren zum ueberwachen der stroemung eines fliessenden mediums - Google Patents

Spirometer und verfahren zum ueberwachen der stroemung eines fliessenden mediums

Info

Publication number
DE2227067A1
DE2227067A1 DE19722227067 DE2227067A DE2227067A1 DE 2227067 A1 DE2227067 A1 DE 2227067A1 DE 19722227067 DE19722227067 DE 19722227067 DE 2227067 A DE2227067 A DE 2227067A DE 2227067 A1 DE2227067 A1 DE 2227067A1
Authority
DE
Germany
Prior art keywords
thermistor
temperature
circuit
potential difference
compensation
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
DE19722227067
Other languages
German (de)
English (en)
Inventor
Michael R Utenick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandoz AG
Original Assignee
Sandoz AG
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 Sandoz AG filed Critical Sandoz AG
Publication of DE2227067A1 publication Critical patent/DE2227067A1/de
Ceased legal-status Critical Current

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
    • G01F1/68—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
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters
    • G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/08—Measuring devices for evaluating the respiratory organs
    • A61B5/087—Measuring breath flow
    • A61B5/0878—Measuring breath flow using temperature sensing means

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physiology (AREA)
  • Molecular Biology (AREA)
  • Pulmonology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
DE19722227067 1971-06-11 1972-06-03 Spirometer und verfahren zum ueberwachen der stroemung eines fliessenden mediums Ceased DE2227067A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15238471A 1971-06-11 1971-06-11

Publications (1)

Publication Number Publication Date
DE2227067A1 true DE2227067A1 (de) 1973-01-04

Family

ID=22542689

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19722227067 Ceased DE2227067A1 (de) 1971-06-11 1972-06-03 Spirometer und verfahren zum ueberwachen der stroemung eines fliessenden mediums

Country Status (8)

Country Link
JP (1) JPS56150507U (enrdf_load_stackoverflow)
CA (1) CA962089A (enrdf_load_stackoverflow)
CH (1) CH549218A (enrdf_load_stackoverflow)
DE (1) DE2227067A1 (enrdf_load_stackoverflow)
FR (1) FR2141312A5 (enrdf_load_stackoverflow)
GB (1) GB1397113A (enrdf_load_stackoverflow)
IT (1) IT956445B (enrdf_load_stackoverflow)
SU (1) SU508161A3 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4562731A (en) * 1979-07-24 1986-01-07 Hitachi, Ltd. Air flow meter

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2444511C3 (de) * 1974-09-18 1981-07-30 Volkswagenwerk Ag, 3180 Wolfsburg Thermischer Strömungsmesser für gasförmige Medien
JPS5543447A (en) * 1978-09-22 1980-03-27 Hitachi Ltd Hot-wire type flow rate measuring device
FR2459962A1 (fr) * 1979-06-25 1981-01-16 Assistance Tech Med Capteur de debit gazeux a fil chaud
US4334186A (en) 1979-10-03 1982-06-08 Hitachi, Ltd. Apparatus for driving hot-wire type flow sensor
FR2667147A1 (fr) * 1990-09-25 1992-03-27 Cit Alcatel Detecteur de niveau de liquide.
NL9201906A (nl) * 1992-11-02 1994-06-01 Huiberts Albertus T Werkwijze en inrichting voor het meten van het debiet van een mediumstroom.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4562731A (en) * 1979-07-24 1986-01-07 Hitachi, Ltd. Air flow meter

Also Published As

Publication number Publication date
CA962089A (en) 1975-02-04
JPS56150507U (enrdf_load_stackoverflow) 1981-11-11
IT956445B (it) 1973-10-10
FR2141312A5 (enrdf_load_stackoverflow) 1973-01-19
CH549218A (de) 1974-05-15
GB1397113A (en) 1975-06-11
SU508161A3 (ru) 1976-03-25

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Legal Events

Date Code Title Description
OD Request for examination
8131 Rejection