JPS5719672A - Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism - Google Patents
Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanismInfo
- Publication number
- JPS5719672A JPS5719672A JP9388780A JP9388780A JPS5719672A JP S5719672 A JPS5719672 A JP S5719672A JP 9388780 A JP9388780 A JP 9388780A JP 9388780 A JP9388780 A JP 9388780A JP S5719672 A JPS5719672 A JP S5719672A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- heat rays
- mid
- point
- adjusting
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/10—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables
- G01P5/12—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables using variation of resistance of a heated conductor
-
- 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
- G01F1/6983—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters adapted for burning-off deposits
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
PURPOSE:To perform burning-off extraneous matter produced by heat rays at prescribed temperature regardless of ambient temperature by preparing in a mid-point adjusting circuit a variable adjusting resistance for mid-point electric potential grounded together with a transistor and by connecting a constant-voltage regulated power independently to permit the potential mid-point of which varies to be constant. CONSTITUTION:A mid-point potential adjusting circuit 9 has transister TR10, 11, resistances 12, 13 and an input terminal A, actuated by a constant-voltage regulating power 14 through a resistance 15 and connected to a mid-point potential adjusting resistance 16 that is a variable resistance. The output is connected a middle point C on the side of an adjusting resistance R2. In this bridge circuit, the value of a combined resistance between the heat rays resistance RH and a reference resistance RM is set at a valve remarkably smaller than the total summed valve of temp. compensation resistance RK, a reference resistance R1 and an adjusting resistance R2 therefore the most parts of the bridge current flow on the side of heat rays. Accordingly, the heat rays are heated, and the desired burning-off temperature is obtained. Through said process it is possible to prevent a change of a characteristic caused by overheat by heat rays thereby enabling accurate measurement of flow velocity for a long period.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9388780A JPS5719672A (en) | 1980-07-11 | 1980-07-11 | Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9388780A JPS5719672A (en) | 1980-07-11 | 1980-07-11 | Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5719672A true JPS5719672A (en) | 1982-02-01 |
JPH0147749B2 JPH0147749B2 (en) | 1989-10-16 |
Family
ID=14094984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9388780A Granted JPS5719672A (en) | 1980-07-11 | 1980-07-11 | Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5719672A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60154116A (en) * | 1984-01-25 | 1985-08-13 | Japan Electronic Control Syst Co Ltd | Hot wire type flow meter |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5476182A (en) * | 1977-11-09 | 1979-06-18 | Bosch Gmbh Robert | Device for measuring quantity of air |
JPS5576182A (en) * | 1978-11-30 | 1980-06-09 | Fuji Shoji | Steel cord and tire using steel cord |
-
1980
- 1980-07-11 JP JP9388780A patent/JPS5719672A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5476182A (en) * | 1977-11-09 | 1979-06-18 | Bosch Gmbh Robert | Device for measuring quantity of air |
JPS5576182A (en) * | 1978-11-30 | 1980-06-09 | Fuji Shoji | Steel cord and tire using steel cord |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60154116A (en) * | 1984-01-25 | 1985-08-13 | Japan Electronic Control Syst Co Ltd | Hot wire type flow meter |
Also Published As
Publication number | Publication date |
---|---|
JPH0147749B2 (en) | 1989-10-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4283944A (en) | Apparatus for measuring the mass of a fluid medium | |
GB1451231A (en) | Gas sensitive devices | |
ATE136643T1 (en) | COMPENSATION CIRCUIT FOR ZERO POINT DEVIATION | |
JPS55112523A (en) | Gas flow rate measuring unit | |
JPS5719672A (en) | Heat rays type flow velocity meter equipped with heat rays extraneous matter burning-off mechanism | |
JPH075008A (en) | Method for calibrating time response of mass air flow sensor without air flow | |
JPS57163822A (en) | Measuring device for air flow rate | |
US4571991A (en) | Air flow measuring apparatus | |
JPS5716343A (en) | Thermal conductivity detector | |
JPS6416957A (en) | Device for detecting mixing rate of different kinds of fuel | |
GB1431039A (en) | Pressure transducer arrangements | |
JPS5537906A (en) | Pressure transmission device | |
DE3677580D1 (en) | CONTINUOUS HEATER. | |
JPS57132211A (en) | Temperature control method for heater | |
GB835551A (en) | Improvements in and relating to temperature measuring devices | |
GB1472949A (en) | Electro-optical apparatus | |
JPS57184923A (en) | Hot-wire type flowmeter | |
JPS5760263A (en) | Flow direction gauge | |
GB2082774A (en) | Thermocouple Cold Junction Compensation | |
FR2456950A1 (en) | Cell for thermal conductivity measurement - operates on voltage change required to maintain constant filament temperature | |
JPS57118148A (en) | Measuring apparatus for relative humidity | |
JPS5712332A (en) | Temperature sensor | |
JPS6266147A (en) | Measuring method for heat constant by temperature step thin wire heating | |
JPS5589726A (en) | Temperature measuring unit | |
SU861976A2 (en) | Device for measuring rapidly charged temperatures |