GB1508636A - Apparatus for indicating fluid flow velocity - Google Patents

Apparatus for indicating fluid flow velocity

Info

Publication number
GB1508636A
GB1508636A GB2951775A GB2951775A GB1508636A GB 1508636 A GB1508636 A GB 1508636A GB 2951775 A GB2951775 A GB 2951775A GB 2951775 A GB2951775 A GB 2951775A GB 1508636 A GB1508636 A GB 1508636A
Authority
GB
United Kingdom
Prior art keywords
output
vfo
pulses
counter
flop
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
GB2951775A
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB2951775A priority Critical patent/GB1508636A/en
Publication of GB1508636A publication Critical patent/GB1508636A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • G01S15/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • 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
    • G01P5/247—Sing-around-systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Measuring Volume Flow (AREA)

Abstract

1508636 Ultrasonic fluid flowmeters UNITED KINGDOM ATOMIC ENERGY AUTHORITY 7 Oct 1976 [14 July 1975] 29517/75 Addition to 1422791 Heading GIG In an ultrasonic fluid flowmeter as described in the Parent Specification, pulses are produced at the difference frequency between the two VFO's and are counted by an up/down counter 67 whose direction of counting is determined by the output of circuitry which determines which of the two VFO's has the greater frequency. As shown, AND gates 61, 63 and 65 determine coincidences between pulses B derived from the output of one VFO and pulses A2, Al and A3 respectively derived from the output of the other VFO, the pulses on output 64 of flip-flop 62 being at the difference frequency and the output of flip-flop 66 determining the direction of counting. Means may be provided for reversing the setting of the counter and for displaying a negative symbol when the counter counts below zero.
GB2951775A 1976-10-07 1976-10-07 Apparatus for indicating fluid flow velocity Expired GB1508636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2951775A GB1508636A (en) 1976-10-07 1976-10-07 Apparatus for indicating fluid flow velocity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2951775A GB1508636A (en) 1976-10-07 1976-10-07 Apparatus for indicating fluid flow velocity

Publications (1)

Publication Number Publication Date
GB1508636A true GB1508636A (en) 1978-04-26

Family

ID=10292790

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2951775A Expired GB1508636A (en) 1976-10-07 1976-10-07 Apparatus for indicating fluid flow velocity

Country Status (1)

Country Link
GB (1) GB1508636A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0093505A1 (en) * 1982-04-05 1983-11-09 British Nuclear Fuels PLC Method of measuring fluid oscillation amplitude
US4685093A (en) * 1985-04-03 1987-08-04 Brookes & Gatehouse Limited Speed measurement device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0093505A1 (en) * 1982-04-05 1983-11-09 British Nuclear Fuels PLC Method of measuring fluid oscillation amplitude
US4685093A (en) * 1985-04-03 1987-08-04 Brookes & Gatehouse Limited Speed measurement device

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Legal Events

Date Code Title Description
PS Patent sealed