SU574675A1 - Thermoanemometric resistivity sensor - Google Patents
Thermoanemometric resistivity sensorInfo
- Publication number
- SU574675A1 SU574675A1 SU7402042173A SU2042173A SU574675A1 SU 574675 A1 SU574675 A1 SU 574675A1 SU 7402042173 A SU7402042173 A SU 7402042173A SU 2042173 A SU2042173 A SU 2042173A SU 574675 A1 SU574675 A1 SU 574675A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- thermoanemometric
- resistivity sensor
- sensor
- speed
- resistivity
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Description
поток Q, рассеиваемый на чувствительном элементе 5, имеет видthe flux Q dispersed on the sensitive element 5 has the form
Q Q, + BYv,Q Q, + BYv,
где QO - тепловой поток в неподвилшой ереде;where QO is the heat flux in the unconnected range;
и - скорость исследуемого потока; В - коэффициент пропорциональности, завис щий от свойств среды и терморезистивного элемента.and - the speed of the stream under study; B is the proportionality coefficient, depending on the properties of the medium and the thermal resistance element.
Поддержива посто нным ток через элемент 5, можно определить величину скорости по падению напр жени на элементе 5 с помощью заранее сн той градуировочной кривой . Так как при наличии скорости в исследуемой среде элемент 5 охлаждаетс ,то величина его электрического сопротивлени (и падени напр жени на нем) однозначно зависит от его температурного коэффициента сопротивлени (ТКС). Поэтому любое увеличение ТКС ведет к повышению чувствительности датчика.By maintaining a constant current through element 5, it is possible to determine the magnitude of the velocity by the voltage drop on element 5 using a previously removed calibration curve. Since, in the presence of speed in the medium under study, element 5 is cooled, the magnitude of its electrical resistance (and the voltage drop across it) uniquely depends on its temperature coefficient of resistance (TCR). Therefore, any increase in TKS leads to an increase in the sensitivity of the sensor.
При использовании никелевой фольги толЩИной 20 мкм, изол ционного подсло толщиной 2 мкм и элемента 5 из никел с размерами 0,1 мм-1,5 мм-6.10- мм посто нна датчика составл ет 10- сек, а частотный диапазон расшир етс до б-Ю гц при изменении скорости водных потоков в диапазоне 1- 10 м/сек.When using nickel foil with a thickness of 20 microns, an insulating underlayer 2 microns thick and a nickel element 5 with dimensions of 0.1 mm-1.5 mm-6.10 mm, the sensor constant is 10 sec, and the frequency range is expanded to -U Hz when changing the speed of water flows in the range of 1- 10 m / s.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7402042173A SU574675A1 (en) | 1974-07-09 | 1974-07-09 | Thermoanemometric resistivity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7402042173A SU574675A1 (en) | 1974-07-09 | 1974-07-09 | Thermoanemometric resistivity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU574675A1 true SU574675A1 (en) | 1977-09-30 |
Family
ID=20590412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU7402042173A SU574675A1 (en) | 1974-07-09 | 1974-07-09 | Thermoanemometric resistivity sensor |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU574675A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4635475A (en) * | 1985-10-31 | 1987-01-13 | General Motors Corporation | Hot element mass airflow sensor |
| US4934190A (en) * | 1987-12-23 | 1990-06-19 | Siemens-Bendix Automotive Electronics L.P. | Silicon-based sensors |
-
1974
- 1974-07-09 SU SU7402042173A patent/SU574675A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4635475A (en) * | 1985-10-31 | 1987-01-13 | General Motors Corporation | Hot element mass airflow sensor |
| US4934190A (en) * | 1987-12-23 | 1990-06-19 | Siemens-Bendix Automotive Electronics L.P. | Silicon-based sensors |
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