GB1439324A - Gas flow measurements - Google Patents
Gas flow measurementsInfo
- Publication number
- GB1439324A GB1439324A GB1762772A GB1762772A GB1439324A GB 1439324 A GB1439324 A GB 1439324A GB 1762772 A GB1762772 A GB 1762772A GB 1762772 A GB1762772 A GB 1762772A GB 1439324 A GB1439324 A GB 1439324A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- velocity
- pyrometers
- pipe
- correlation
- 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.)
- Expired
Links
Classifications
-
- 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
- G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
- G01F1/708—Measuring the time taken to traverse a fixed distance
- G01F1/712—Measuring the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means
-
- 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
- G01P5/18—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 time taken to traverse a fixed distance
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
1439324 Measuring gas velocity BRITISH STEEL CORP 16 Oct 1973 [17 Oct 1972] 17627/72 Heading G1A The mean velocity of a gas, e.g. the effluent from a steelmaking vessel, is measured by detecting emitted radiation at two points spaced along the flow or determining the delay to the upstream signal necessary to produce maximum correlation between the waveforms. As shown, Fig. 1, the gas flow through a pipe 1 is monitored by two I.R. pyrometers 2, 3 (e.g. PbS photo-conductors) having narrow fields of view which lie in parallel planes but are inclined to one another so as to define a restricted axial path in the gas along which correlation exists and the velocity is determined. The detector signals are passed through identical filters 4 which may be high, low or band-pass selected in accordance with the emission characteristics of the gas and the measurement mode used. The upstream signal is passed through a variable delay network 6 and a circuit 7 derives the correlation junction, the maximum value of which is attained when the delay introduced by network 6 is equal to the 'time of flight' of the gas between the two pyrometers. A circuit 8 calculates and displays the velocity of the gas. For certain applications fast acting AGC amplifiers 4A may be introduced into the signal channels. One or both pyrometers may be mounted for pivotal movement within the crosssectional plane of the pipe in order to scan the effective measurement axis across the pipe to obtain a velocity profile.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1762772A GB1439324A (en) | 1972-10-17 | 1972-10-17 | Gas flow measurements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1762772A GB1439324A (en) | 1972-10-17 | 1972-10-17 | Gas flow measurements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1439324A true GB1439324A (en) | 1976-06-16 |
Family
ID=10098451
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1762772A Expired GB1439324A (en) | 1972-10-17 | 1972-10-17 | Gas flow measurements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1439324A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2029569A (en) * | 1978-09-07 | 1980-03-19 | Standard Telephones Cables Ltd | Fluid flowmeter |
EP0100304A1 (en) * | 1982-06-11 | 1984-02-08 | Gedevelop Aktiebolag | Method and apparatus for determining the flow velocity of a molten, radiation-emitting material |
DE3642771A1 (en) * | 1986-12-15 | 1988-06-23 | Kuipers Ulrich | METHOD AND DEVICE FOR MEASURING THE MEASURING SIZE OF A MEASURING OBJECT |
WO2004097346A1 (en) * | 2003-04-30 | 2004-11-11 | Tetra Laval Holdings & Finance Sa | A method for monitoring the stay time in a restricted conduit |
FR2914740A1 (en) * | 2007-04-06 | 2008-10-10 | Peugeot Citroen Automobiles Sa | Fluid e.g. gas, volumetric flow rate determining method for fuel cell of e.g. motor vehicle, involves measuring change of fluid temperature in points of pipe, obtaining profiles, and evaluating delay of one profile on another profile |
-
1972
- 1972-10-17 GB GB1762772A patent/GB1439324A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2029569A (en) * | 1978-09-07 | 1980-03-19 | Standard Telephones Cables Ltd | Fluid flowmeter |
GB2029569B (en) * | 1978-09-07 | 1983-03-09 | Standard Telephones Cables Ltd | Fluid flowmeter |
EP0100304A1 (en) * | 1982-06-11 | 1984-02-08 | Gedevelop Aktiebolag | Method and apparatus for determining the flow velocity of a molten, radiation-emitting material |
DE3642771A1 (en) * | 1986-12-15 | 1988-06-23 | Kuipers Ulrich | METHOD AND DEVICE FOR MEASURING THE MEASURING SIZE OF A MEASURING OBJECT |
WO2004097346A1 (en) * | 2003-04-30 | 2004-11-11 | Tetra Laval Holdings & Finance Sa | A method for monitoring the stay time in a restricted conduit |
EA008680B1 (en) * | 2003-04-30 | 2007-06-29 | Тетра Лаваль Холдингз Энд Файнэнс Са | A method for monitoring the stay time of liquid food products in a restricted conduit |
CN100419389C (en) * | 2003-04-30 | 2008-09-17 | 利乐拉瓦尔集团及财务有限公司 | A method for monitoring the stay time in a restricted conduit |
US7487665B2 (en) | 2003-04-30 | 2009-02-10 | Tetra Laval Holdings & Finance S.A. | Method for monitoring the stay time in a restricted conduit |
FR2914740A1 (en) * | 2007-04-06 | 2008-10-10 | Peugeot Citroen Automobiles Sa | Fluid e.g. gas, volumetric flow rate determining method for fuel cell of e.g. motor vehicle, involves measuring change of fluid temperature in points of pipe, obtaining profiles, and evaluating delay of one profile on another profile |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
49R | Reference inserted (sect. 9/1949) | ||
SP | Amendment (slips) printed | ||
PCNP | Patent ceased through non-payment of renewal fee |