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FR2241080A1 - Acoustic measurement of liquid or powder surface level - by alteration of phase to produce standing wave - Google Patents

Acoustic measurement of liquid or powder surface level - by alteration of phase to produce standing wave

Info

Publication number
FR2241080A1
FR2241080A1FR7329663AFR7329663AFR2241080A1FR 2241080 A1FR2241080 A1FR 2241080A1FR 7329663 AFR7329663 AFR 7329663AFR 7329663 AFR7329663 AFR 7329663AFR 2241080 A1FR2241080 A1FR 2241080A1
Authority
FR
France
Prior art keywords
phase
standing wave
alteration
liquid
surface level
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
FR7329663A
Other languages
French (fr)
Other versions
FR2241080B1 (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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEAfiledCriticalCommissariat a lEnergie Atomique CEA
Priority to FR7329663ApriorityCriticalpatent/FR2241080A1/en
Publication of FR2241080A1publicationCriticalpatent/FR2241080A1/en
Application grantedgrantedCritical
Publication of FR2241080B1publicationCriticalpatent/FR2241080B1/fr
Grantedlegal-statusCriticalCurrent

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Abstract

The level of the surface of a fluid or powder is measured by inserting a tube with the upper end closed into the material. Sound waves are reflected from the surface and picked up by a receiver shielded from the direct sound wave. The echo path can be used to set the frequency of the source according to the path length, or to vary the phase of a wave from a fixed source. In each case frequency or phase to voltage converters can be used to give an output proportional to the level. Alternatively the cavity may be excited by white noise to find the frequency at which a standing wave is formed.
FR7329663A1973-08-141973-08-14Acoustic measurement of liquid or powder surface level - by alteration of phase to produce standing waveGrantedFR2241080A1 (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
FR7329663AFR2241080A1 (en)1973-08-141973-08-14Acoustic measurement of liquid or powder surface level - by alteration of phase to produce standing wave

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
FR7329663AFR2241080A1 (en)1973-08-141973-08-14Acoustic measurement of liquid or powder surface level - by alteration of phase to produce standing wave

Publications (2)

Publication NumberPublication Date
FR2241080A1true FR2241080A1 (en)1975-03-14
FR2241080B1 FR2241080B1 (en)1976-06-18

Family

ID=9123987

Family Applications (1)

Application NumberTitlePriority DateFiling Date
FR7329663AGrantedFR2241080A1 (en)1973-08-141973-08-14Acoustic measurement of liquid or powder surface level - by alteration of phase to produce standing wave

Country Status (1)

CountryLink
FR (1)FR2241080A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
EP0094965A4 (en)*1981-11-271985-10-14Motorola IncSonic pressure volume measuring device.
WO1988008985A1 (en)*1987-05-051988-11-17Beckman Instruments, Inc.Sonic system for measuring liquid height or level
FR2637367A1 (en)*1988-10-051990-04-06Geotechnical Instr Uk Ltd METHOD AND APPARATUS FOR MEASURING THE LEVEL OF LIQUID IN THE SOIL
EP0462342A1 (en)*1990-06-181991-12-27Kansai Automation Co. Ltd.Method and apparatus for detecting the level of a substance
US5465629A (en)*1992-06-081995-11-14Behring Diagnostics Inc.Liquid dispensing system with acoustic sensing means
WO2012117261A1 (en)*2011-03-032012-09-07University Of BradfordMethods and apparatus for detection of fluid interface fluctuations
GB2570963A (en)*2018-02-072019-08-14Floodflash LtdDevice and method for sensing the level of naturally-occuring water, and method for installation of such a device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
EP0094965A4 (en)*1981-11-271985-10-14Motorola IncSonic pressure volume measuring device.
WO1988008985A1 (en)*1987-05-051988-11-17Beckman Instruments, Inc.Sonic system for measuring liquid height or level
US4790183A (en)*1987-05-051988-12-13Beckman Instruments, Inc.Acoustic impedance system for liquid boundary level detection
FR2637367A1 (en)*1988-10-051990-04-06Geotechnical Instr Uk Ltd METHOD AND APPARATUS FOR MEASURING THE LEVEL OF LIQUID IN THE SOIL
EP0462342A1 (en)*1990-06-181991-12-27Kansai Automation Co. Ltd.Method and apparatus for detecting the level of a substance
US5465629A (en)*1992-06-081995-11-14Behring Diagnostics Inc.Liquid dispensing system with acoustic sensing means
WO2012117261A1 (en)*2011-03-032012-09-07University Of BradfordMethods and apparatus for detection of fluid interface fluctuations
GB2570963A (en)*2018-02-072019-08-14Floodflash LtdDevice and method for sensing the level of naturally-occuring water, and method for installation of such a device
GB2578564A (en)*2018-02-072020-05-20Floodflash LtdDevice and method for sensing the level of naturally-occurring water, and method for installation of such a device

Also Published As

Publication numberPublication date
FR2241080B1 (en)1976-06-18

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