JPS5639416A - Laminar flow-type flow meter - Google Patents

Laminar flow-type flow meter

Info

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
Application number
JP11457979A
Other languages
Japanese (ja)
Inventor
Kazuo Moriya
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.)
Toyoda Koki KK
Original Assignee
Toyoda Koki KK
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 Toyoda Koki KK filed Critical Toyoda Koki KK
Priority to JP11457979A priority Critical patent/JPS5639416A/en
Publication of JPS5639416A publication Critical patent/JPS5639416A/en
Pending legal-status Critical Current

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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
JP11457979A 1979-09-06 1979-09-06 Laminar flow-type flow meter Pending JPS5639416A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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