GB2019568A - Improvements in or relating to ultrasonic liquid level gauges - Google Patents

Improvements in or relating to ultrasonic liquid level gauges

Info

Publication number
GB2019568A
GB2019568A GB7916914A GB7916914A GB2019568A GB 2019568 A GB2019568 A GB 2019568A GB 7916914 A GB7916914 A GB 7916914A GB 7916914 A GB7916914 A GB 7916914A GB 2019568 A GB2019568 A GB 2019568A
Authority
GB
United Kingdom
Prior art keywords
acoustic waves
transducer
liquid
surface acoustic
plane
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
Application number
GB7916914A
Other versions
GB2019568B (en
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 GB7916914A priority Critical patent/GB2019568B/en
Priority to IT50727/79A priority patent/IT1164058B/en
Priority to FI793405A priority patent/FI65244C/en
Publication of GB2019568A publication Critical patent/GB2019568A/en
Application granted granted Critical
Publication of GB2019568B publication Critical patent/GB2019568B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G01F23/2962—Measuring transit time of reflected waves
    • 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
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

An ultrasonic liquid level gauge consisting of a surface which can be immersed in a liquid the level of which is to be determined, a transducer for exciting and detecting surface acoustic waves in the surface, a reflector consisting of at least one plane surface 5 positioned to reflect compression waves having a plane wavefront in the liquid arising from mode conversion of the surface acoustic waves in the liquid back to the surface at an angle such that they are re-converted into surface acoustic waves which are detected by the transducer, and means for measuring the time interval between the initial and returning surface acoustic waves. The transducer may be an electromagnetic acoustic transceiver comprising a flat rectangular coil whose plane is perpendicular to the surface and which is disposed between the poles of a magnet (Fig. 6, not shown). Types of reflectors include suitably angled planes (Fig. 2, not shown), a graticule (Fig. 4. not shown) and a floating corner reflector (Fig. 5, not shown). <IMAGE>
GB7916914A 1978-03-01 1979-03-02 Ultrasonic liquid level gauges Expired GB2019568B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB7916914A GB2019568B (en) 1978-03-01 1979-03-02 Ultrasonic liquid level gauges
IT50727/79A IT1164058B (en) 1978-11-01 1979-10-31 N-3,5-Cis-di:methyl-piperazino-propyl-carbazole
FI793405A FI65244C (en) 1978-11-01 1979-10-31 PROCEDURE FOR FRAMSTATION OF AV 9- (3- (3,5-CIS-DIMETHYLPIPERAZINE) PROPYL) CARBAZOLE ANVAENDBAR SAOSOM ETT PSYKOTROPISKT MEDEL

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB806178 1978-03-01
GB7916914A GB2019568B (en) 1978-03-01 1979-03-02 Ultrasonic liquid level gauges

Publications (2)

Publication Number Publication Date
GB2019568A true GB2019568A (en) 1979-10-31
GB2019568B GB2019568B (en) 1983-02-02

Family

ID=26241876

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7916914A Expired GB2019568B (en) 1978-03-01 1979-03-02 Ultrasonic liquid level gauges

Country Status (1)

Country Link
GB (1) GB2019568B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106677A2 (en) * 1982-10-14 1984-04-25 Gilbarco Inc. Tank gauging system and methods
EP0146829A2 (en) * 1983-12-07 1985-07-03 Asea Ab Ultrasonic measuring device
US4890490A (en) * 1987-07-06 1990-01-02 United Kingdom Atomic Energy Authority Liquid level monitoring
EP1136796A3 (en) * 2000-03-08 2003-08-20 Robert Bosch Gmbh Liquid level detection using acoustic surface waves
DE102005013269A1 (en) * 2005-03-22 2006-09-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for determining the liquid level of a liquid phase via an ultrasonic transit time measurement
GB2427273A (en) * 2005-06-14 2006-12-20 Inertia Switch Ltd Fluid level sensor using Rayleigh-Lamb waves
DE102015113311A1 (en) * 2015-08-12 2017-02-16 Inoson GmbH Method and device for determining the position of a piston in a cylinder filled with liquid

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106677A2 (en) * 1982-10-14 1984-04-25 Gilbarco Inc. Tank gauging system and methods
EP0106677A3 (en) * 1982-10-14 1985-04-03 Gilbarco Inc. Tank gauging system and methods
EP0146829A2 (en) * 1983-12-07 1985-07-03 Asea Ab Ultrasonic measuring device
EP0146829A3 (en) * 1983-12-07 1987-04-22 Asea Ab Ultrasonic measuring device
US4890490A (en) * 1987-07-06 1990-01-02 United Kingdom Atomic Energy Authority Liquid level monitoring
EP1136796A3 (en) * 2000-03-08 2003-08-20 Robert Bosch Gmbh Liquid level detection using acoustic surface waves
DE102005013269A1 (en) * 2005-03-22 2006-09-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for determining the liquid level of a liquid phase via an ultrasonic transit time measurement
GB2427273A (en) * 2005-06-14 2006-12-20 Inertia Switch Ltd Fluid level sensor using Rayleigh-Lamb waves
DE102015113311A1 (en) * 2015-08-12 2017-02-16 Inoson GmbH Method and device for determining the position of a piston in a cylinder filled with liquid
DE102015113311B4 (en) * 2015-08-12 2017-03-16 Inoson GmbH Method and device for determining the position of a piston in a cylinder filled with liquid

Also Published As

Publication number Publication date
GB2019568B (en) 1983-02-02

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920515