FR2325028A1 - Level detector for liquid in reservoir - uses transmit-receive pulsed acoustic probe in contact with outside wall to monitor level of reflection of acoustic pulses - Google Patents

Level detector for liquid in reservoir - uses transmit-receive pulsed acoustic probe in contact with outside wall to monitor level of reflection of acoustic pulses

Info

Publication number
FR2325028A1
FR2325028A1 FR7528573A FR7528573A FR2325028A1 FR 2325028 A1 FR2325028 A1 FR 2325028A1 FR 7528573 A FR7528573 A FR 7528573A FR 7528573 A FR7528573 A FR 7528573A FR 2325028 A1 FR2325028 A1 FR 2325028A1
Authority
FR
France
Prior art keywords
reservoir
liquid
level
contact
wall
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
FR7528573A
Other languages
French (fr)
Other versions
FR2325028B3 (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.)
ULTRAFLUX
Original Assignee
ULTRAFLUX
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 ULTRAFLUX filed Critical ULTRAFLUX
Priority to FR7528573A priority Critical patent/FR2325028A1/en
Publication of FR2325028A1 publication Critical patent/FR2325028A1/en
Application granted granted Critical
Publication of FR2325028B3 publication Critical patent/FR2325028B3/fr
Granted 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
    • G01F23/2965—Measuring attenuation of transmitted waves
    • 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
    • G01F23/2961—Acoustic waves for discrete levels

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

The device described can detect the presence of a liquid at a certain level through the wall of a reservoir. It comprises a transmit-receive pulsed acoustic probe (1) which is placed in contact with the external surface of the reservoir wall at the level at which the presence (or absence) of liquid is to be determined. Acoustic pulses are emitted and these propagate into the wall. Echoes are received due to successive reflections at the internal surface of the wall and at the probe's transmit-receive surface. The echoes received are selected from a predetermined burst and a signalling system (6) is triggered when the selected echoes reach a predetermined threshold amplitude. The echo selection unit comprises two monostable circuits (4, 8) and an AND gate (5).
FR7528573A 1975-09-18 1975-09-18 Level detector for liquid in reservoir - uses transmit-receive pulsed acoustic probe in contact with outside wall to monitor level of reflection of acoustic pulses Granted FR2325028A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7528573A FR2325028A1 (en) 1975-09-18 1975-09-18 Level detector for liquid in reservoir - uses transmit-receive pulsed acoustic probe in contact with outside wall to monitor level of reflection of acoustic pulses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7528573A FR2325028A1 (en) 1975-09-18 1975-09-18 Level detector for liquid in reservoir - uses transmit-receive pulsed acoustic probe in contact with outside wall to monitor level of reflection of acoustic pulses

Publications (2)

Publication Number Publication Date
FR2325028A1 true FR2325028A1 (en) 1977-04-15
FR2325028B3 FR2325028B3 (en) 1978-05-05

Family

ID=9160125

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7528573A Granted FR2325028A1 (en) 1975-09-18 1975-09-18 Level detector for liquid in reservoir - uses transmit-receive pulsed acoustic probe in contact with outside wall to monitor level of reflection of acoustic pulses

Country Status (1)

Country Link
FR (1) FR2325028A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060027A1 (en) * 1981-03-06 1982-09-15 British Gas Corporation Device for detecting flooding of a hollow structure
EP0035318B1 (en) * 1980-03-03 1985-05-02 C-Tape Developments Limited Improvements in electroacoustic transducers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035318B1 (en) * 1980-03-03 1985-05-02 C-Tape Developments Limited Improvements in electroacoustic transducers
EP0060027A1 (en) * 1981-03-06 1982-09-15 British Gas Corporation Device for detecting flooding of a hollow structure

Also Published As

Publication number Publication date
FR2325028B3 (en) 1978-05-05

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