DE2227067A1 - Spirometer und verfahren zum ueberwachen der stroemung eines fliessenden mediums - Google Patents
Spirometer und verfahren zum ueberwachen der stroemung eines fliessenden mediumsInfo
- 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
Links
- 238000012544 monitoring process Methods 0.000 title claims description 15
- 238000000034 method Methods 0.000 title claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
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)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Pulmonology (AREA)
- General Physics & Mathematics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Heart & Thoracic Surgery (AREA)
- Physiology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring Volume Flow (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
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 (enExample) |
| CA (1) | CA962089A (enExample) |
| CH (1) | CH549218A (enExample) |
| DE (1) | DE2227067A1 (enExample) |
| FR (1) | FR2141312A5 (enExample) |
| GB (1) | GB1397113A (enExample) |
| IT (1) | IT956445B (enExample) |
| SU (1) | SU508161A3 (enExample) |
Cited By (1)
| 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)
| 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 |
| DE3037340C2 (de) | 1979-10-03 | 1985-07-18 | Hitachi, Ltd., Tokio/Tokyo | Treiber für Hitzdraht-Luftmengenmesser |
| 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. |
-
1972
- 1972-05-31 CH CH803472A patent/CH549218A/xx not_active IP Right Cessation
- 1972-06-03 DE DE19722227067 patent/DE2227067A1/de not_active Ceased
- 1972-06-07 GB GB2648372A patent/GB1397113A/en not_active Expired
- 1972-06-08 CA CA144,196A patent/CA962089A/en not_active Expired
- 1972-06-09 FR FR7220763A patent/FR2141312A5/fr not_active Expired
- 1972-06-10 SU SU1802101A patent/SU508161A3/ru active
- 1972-06-10 IT IT2552572A patent/IT956445B/it active
-
1981
- 1981-03-17 JP JP3643481U patent/JPS56150507U/ja active Pending
Cited By (1)
| 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 |
| CH549218A (de) | 1974-05-15 |
| FR2141312A5 (enExample) | 1973-01-19 |
| SU508161A3 (ru) | 1976-03-25 |
| IT956445B (it) | 1973-10-10 |
| JPS56150507U (enExample) | 1981-11-11 |
| GB1397113A (en) | 1975-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OD | Request for examination | ||
| 8131 | Rejection |