SU591774A1 - Fluid flow velocity meter - Google Patents
Fluid flow velocity meterInfo
- Publication number
- SU591774A1 SU591774A1 SU762401041A SU2401041A SU591774A1 SU 591774 A1 SU591774 A1 SU 591774A1 SU 762401041 A SU762401041 A SU 762401041A SU 2401041 A SU2401041 A SU 2401041A SU 591774 A1 SU591774 A1 SU 591774A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- fluid flow
- flow velocity
- velocity meter
- measuring
- accuracy
- Prior art date
Links
Landscapes
- Measuring Volume Flow (AREA)
Description
тока усилител не бопее 0,1 от величины посто нной составп юшей, то крутизна грацуировочной характеристики в диапазоне мапых скоростей достаточно высока, что и позвол ет увеличить точность измерени . Так при измерении потоков воды при погреш ности в измерении переменного тока J(j- 5% на скорости V .0,5 м/с может быть получена погрешность измерени скорости ,, 8%. Таким образом, в предлагаемом спосрое по сравнению с известными значительно У увеличиваетс точность измерени мапых. скоростей. Формула и 3 о б р е т е и и Способ измерени скорости газожидкост:ных потоков Галкина,заключающийс втом.что в лоток помещают термоапемометр посто нного тока, регулируют ток нагрева термочувствительного элемента, йключенного в измерительный мост, посредством усилител обратной св зи, и по величине тока суд т о скорости потока, отличающийс тем, что, с целью повышени точности измерени малых скоростей, в усилитель обратной св зи подают переменный ток, поддержива посто нными амплитуду и частоту переменного тока в процессе измерени , а а выходе термранемометра измер ют переменную составл ющую тока нагрева, и по ее значению определ ют величину скорости ntiтрка . Источники информации, прин тые во вниманиепри экспертизе: 1.Армистед и Кейес.Пленочный датчик дд изучени турбулентности вблизи стенки. Приборы дл :научных исследований, 1968, № 1, с, 64-71. 2.Авторское свидетельство Jvfe 146610, кл. Q 01 Р 5/12, 1962.the current amplifier is not more than 0.1 of the magnitude of the constant component, then the gradient of the grading characteristic in the speed range is rather high, which makes it possible to increase the measurement accuracy. So, when measuring water flows with an error in measuring alternating current J (j-5% at a speed of V .0.5 m / s, an accuracy of measuring speed of 8% can be obtained. Thus, in the proposed procedure, compared with the known The accuracy of the measurement of the speeds increases. Formula and 3 of the rim and Method of measuring the speed of gas-liquid flows of Galkin, which consists of a thermo-anemometer of direct current, which is switched on in the measuring bridge mediated Your feedback amplifier is judged by the magnitude of the current, which is characterized in that, in order to improve the accuracy of measuring small speeds, an alternating current is supplied to the feedback amplifier, maintaining a constant amplitude and frequency of the alternating current during the measurement, and the output of the thermranemometer measures the variable component of the heating current, and determines the magnitude of the velocity of penetration by its value. Sources of information taken into account in the examination: 1.Armised and Keyes. iz wall Instruments for: scientific research, 1968, No. 1, p. 64-71. 2. The copyright certificate Jvfe 146610, cl. Q 01 P 5/12, 1962.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762401041A SU591774A1 (en) | 1976-09-06 | 1976-09-06 | Fluid flow velocity meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762401041A SU591774A1 (en) | 1976-09-06 | 1976-09-06 | Fluid flow velocity meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU591774A1 true SU591774A1 (en) | 1978-02-05 |
Family
ID=20675790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU762401041A SU591774A1 (en) | 1976-09-06 | 1976-09-06 | Fluid flow velocity meter |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU591774A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4562731A (en) * | 1979-07-24 | 1986-01-07 | Hitachi, Ltd. | Air flow meter |
-
1976
- 1976-09-06 SU SU762401041A patent/SU591774A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4562731A (en) * | 1979-07-24 | 1986-01-07 | Hitachi, Ltd. | Air flow meter |
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