JPS55131786A - Measurement of fluid flow velocity - Google Patents
Measurement of fluid flow velocityInfo
- Publication number
- JPS55131786A JPS55131786A JP3851479A JP3851479A JPS55131786A JP S55131786 A JPS55131786 A JP S55131786A JP 3851479 A JP3851479 A JP 3851479A JP 3851479 A JP3851479 A JP 3851479A JP S55131786 A JPS55131786 A JP S55131786A
- Authority
- JP
- Japan
- Prior art keywords
- value
- fluid flow
- flow velocity
- measurement
- acoustic wave
- 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
- G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
- G01P5/245—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Measuring Volume Flow (AREA)
Abstract
PURPOSE:To accomplish higher reliability of fluid flow velocity measurement using the value independent of the objective measurement value as the reference value in the measurement of the fluid flow velocity employing acoustic wave including supersonic wave. CONSTITUTION:Acoustic wave is received or transmitted in the opposite direction to each other between transmitting devices 1 and 2 and receiving devices 3 and 4 are separated at a fixed space L as opposed to each other to detect the propagation times t1 and t2 of each acoustic wave in the opposite direction. The value, T=(t1+ t2)/t1t2, is computed to be memorized in the comparison value memory circuit 10 as comparison standard value T0. At the same time, from the propagation times t1 and t2, the value corresponding to the fluid flow velocity, wind speed, vector Vx is determined by computing the equation of [(t2-t1)/t1t2]L/2 and memorized so temporarily in the register 7 to allow continuous output. The value T is used as the noise decision value. When the noise decision value obtained at a certain cycle with respect to the T0 exceeds the allowable range succesively at N cycles, the comparison standard value is corrected adopting the noise decision value T at the cycle N as the new comparison standard value T0. Thus, highly reliable fluid flow velocity measurement can be done.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3851479A JPS6017061B2 (en) | 1979-03-31 | 1979-03-31 | Fluid flow rate measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3851479A JPS6017061B2 (en) | 1979-03-31 | 1979-03-31 | Fluid flow rate measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55131786A true JPS55131786A (en) | 1980-10-13 |
| JPS6017061B2 JPS6017061B2 (en) | 1985-04-30 |
Family
ID=12527371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3851479A Expired JPS6017061B2 (en) | 1979-03-31 | 1979-03-31 | Fluid flow rate measurement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6017061B2 (en) |
-
1979
- 1979-03-31 JP JP3851479A patent/JPS6017061B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6017061B2 (en) | 1985-04-30 |
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