JPS5639416A - Laminar flow-type flow meter - Google Patents
Laminar flow-type flow meterInfo
- Publication number
- JPS5639416A JPS5639416A JP11457979A JP11457979A JPS5639416A JP S5639416 A JPS5639416 A JP S5639416A JP 11457979 A JP11457979 A JP 11457979A JP 11457979 A JP11457979 A JP 11457979A JP S5639416 A JPS5639416 A JP S5639416A
- Authority
- JP
- Japan
- Prior art keywords
- property
- temperature
- laminar flow
- bridge circuit
- flow
- 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.)
- Pending
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
PURPOSE: To provide high-precision flow measurement over a wide temperature range by setting the sensitivity/temperature property of semiconductor differential pressure transducer which detects the difference in pressure before and after the laminar flow grid installed inside the flow path in such manner that the said property may be opposite to the differential pressure/temperature characteristic at the time of constant flow.
CONSTITUTION: The difference of pressure before and after the laminar flow grid installed inside the laminar flow meter is measured by semiconductor distortion gauge G1WG4 arranged at each side of bridge circuit 29 and is indicated by indicator 34 connected to the output terminals 32, 34 of bridge circuit. This output sensitivity has a negative temperature property. The input terminal of bridge circuit 29 is connected to the negative terminal 36 of the power supply 35. While the other input terminal 31 is connected to the collector 41 of transistor 40. The bridge circuit having the positive temperature property of transistor 40, adjusts variable resistance 53 and compensates for temperature by setting the sensitivity/temperature property at the time of constant laminar flow so as to be the opposite property. Thus it is possible to carry out high-precision measurement over an extensive temperature range.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11457979A JPS5639416A (en) | 1979-09-06 | 1979-09-06 | Laminar flow-type flow meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11457979A JPS5639416A (en) | 1979-09-06 | 1979-09-06 | Laminar flow-type flow meter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5639416A true JPS5639416A (en) | 1981-04-15 |
Family
ID=14641365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11457979A Pending JPS5639416A (en) | 1979-09-06 | 1979-09-06 | Laminar flow-type flow meter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5639416A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3801860A1 (en) * | 1987-01-23 | 1988-08-04 | Fuji Photo Film Co Ltd | DEVICE FOR EXAMINING A SURFACE |
-
1979
- 1979-09-06 JP JP11457979A patent/JPS5639416A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3801860A1 (en) * | 1987-01-23 | 1988-08-04 | Fuji Photo Film Co Ltd | DEVICE FOR EXAMINING A SURFACE |
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