GB1274214A - Improvements in and relating to the measurement of rates of flow of gases - Google Patents

Improvements in and relating to the measurement of rates of flow of gases

Info

Publication number
GB1274214A
GB1274214A GB5971668A GB5971668A GB1274214A GB 1274214 A GB1274214 A GB 1274214A GB 5971668 A GB5971668 A GB 5971668A GB 5971668 A GB5971668 A GB 5971668A GB 1274214 A GB1274214 A GB 1274214A
Authority
GB
United Kingdom
Prior art keywords
phase difference
receiver
pipe
gas
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.)
Expired
Application number
GB5971668A
Inventor
Michael John Parkinson
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.)
Coal Industry Patents Ltd
Original Assignee
Coal Industry Patents Ltd
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 Coal Industry Patents Ltd filed Critical Coal Industry Patents Ltd
Priority to GB5971668A priority Critical patent/GB1274214A/en
Priority to DE19691962649 priority patent/DE1962649A1/en
Publication of GB1274214A publication Critical patent/GB1274214A/en
Expired legal-status Critical Current

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
    • G01P5/248—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 by measuring phase differences
    • 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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measuring Volume Flow (AREA)

Abstract

1,274,214. Acoustic measurement of fluid flow. GOAL INDUSTRY (PATENTS). Ltd. 12 Dec., 1969 [16 Dec., 1968], No. 59716/68. Heading H4D. In a method orapparatus for measuring acoustically the rate of flow of gas in a pipe by obtaining signals dependent on the phase difference between the outputs of upstream and downstream ultrasonic receivers 10, 11 and (to allow for the velocity of sound in the gas) on the phase difference between the outputs of a receiver 27 in a path perpendicular to the direction of gas flow, the path length of the signal to receiver 27 is altered by a known amount. In the embodiment a reflector 25 is moved a known distance to give the phase difference from receiver 27. The phase differences are given by signal travel time differences. The transducers are directional and magnetostrictive end transmitters 1, 2 are each secured to phosphorbronze balls (8, Fig. 2, not shown) pivoted in the wall of the pipe. Any misalignment of transmitters 1, 2 or receivers 10, 11 is allowed for by adjustment of phase shifters 17. Zero-crossing detectors change the signals to constantamplitude and a gate 20 produces a train of pulses of width dependent on the time during which both of its input signals are positive; the integrated gate output is applied to a voltmeter 23. to afford a direct measure of the requisite phase difference. A binary counter 42 is utilized to obtain a measure of the phase difference of the receiver 27 before and after movement of reflector 25 by actuator 26. Stray waves reflected by the pipe wall are absorbed by rubber. Each of receivers. 10, 11 may be on the same or opposite sides of the pipe as their respective transmitters. The transmitted waves may be pulse modulated, or A.M. or F.M. continuous waves; the carrier frequency is preferably greater than 20 kHz but not so great as to lead to undue attenuation. The invention is particularly used when solid particles are suspended in the gas; if the concentration of the particles is known, e.g. by measuring the attenuation of #-particles as in Specification 1,274,213 (Division G1), the mass particle flow can be determined.
GB5971668A 1968-12-16 1968-12-16 Improvements in and relating to the measurement of rates of flow of gases Expired GB1274214A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB5971668A GB1274214A (en) 1968-12-16 1968-12-16 Improvements in and relating to the measurement of rates of flow of gases
DE19691962649 DE1962649A1 (en) 1968-12-16 1969-12-13 Method and device for measuring gas flow rates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5971668A GB1274214A (en) 1968-12-16 1968-12-16 Improvements in and relating to the measurement of rates of flow of gases

Publications (1)

Publication Number Publication Date
GB1274214A true GB1274214A (en) 1972-05-17

Family

ID=10484281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5971668A Expired GB1274214A (en) 1968-12-16 1968-12-16 Improvements in and relating to the measurement of rates of flow of gases

Country Status (2)

Country Link
DE (1) DE1962649A1 (en)
GB (1) GB1274214A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135457A (en) * 1983-02-11 1984-08-30 British Steel Corp Improvements in or relating to apparatus for flow measurement
CN111596092A (en) * 2020-05-18 2020-08-28 天津大学 Laser-induced phosphorescence particle-based imaging speed measurement device and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8901763A (en) * 1989-07-10 1991-02-01 Rheometron Ag SUPPORT DEVICE FOR DIRECTION-SENSOR, MEASURING MEASURING SYSTEM EQUIPPED THEREIN AND METHOD FOR ALIGNING SUCH A MEASURING SYSTEM.
DE102006000693A1 (en) * 2006-01-02 2007-07-05 Endress + Hauser Flowtec Ag Device for determining and / or monitoring the volume or mass flow of a medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135457A (en) * 1983-02-11 1984-08-30 British Steel Corp Improvements in or relating to apparatus for flow measurement
CN111596092A (en) * 2020-05-18 2020-08-28 天津大学 Laser-induced phosphorescence particle-based imaging speed measurement device and method

Also Published As

Publication number Publication date
DE1962649A1 (en) 1970-07-02

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees