FR2254025A1 - Device for detecting sand in a conduit - has acoustic transducer in oil filled box attached to pipe exterior - Google Patents

Device for detecting sand in a conduit - has acoustic transducer in oil filled box attached to pipe exterior

Info

Publication number
FR2254025A1
FR2254025A1 FR7440107A FR7440107A FR2254025A1 FR 2254025 A1 FR2254025 A1 FR 2254025A1 FR 7440107 A FR7440107 A FR 7440107A FR 7440107 A FR7440107 A FR 7440107A FR 2254025 A1 FR2254025 A1 FR 2254025A1
Authority
FR
France
Prior art keywords
conduit
acoustic transducer
oil filled
box attached
transducer
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
FR7440107A
Other languages
French (fr)
Other versions
FR2254025B1 (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.)
ExxonMobil Oil Corp
Original Assignee
Mobil Oil Corp
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
Priority claimed from US422618A external-priority patent/US3906780A/en
Application filed by Mobil Oil Corp filed Critical Mobil Oil Corp
Publication of FR2254025A1 publication Critical patent/FR2254025A1/en
Application granted granted Critical
Publication of FR2254025B1 publication Critical patent/FR2254025B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
    • G01N29/046—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks using the echo of particles imparting on a surface; using acoustic emission of particles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/024—Mixtures
    • G01N2291/02408—Solids in gases, e.g. particle suspensions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/024—Mixtures
    • G01N2291/02416—Solids in liquids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0422—Shear waves, transverse waves, horizontally polarised waves

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

A piezoelectric transducer is mounted in a box (12) attached to a pipe (10). The transducer is suspended by means of the output wire (21) and earth connexion in order to maximise its sensitivity to vibrations. The transducer is tuned by a coil (31) and the output passed to a narrow band filter (32) and then amplified (33). This signal is rectified (34) for application to a recording instrument (35) or it is applied to an alarm circuit (36) where a comparator (37) compares the signal with a reference signal (Vr) to operate the alarm (45) if the reference signal is exceeded. The box is filled with an incompressible fluid such as oil through a screw plug (25) opening.
FR7440107A 1973-12-07 1974-12-06 Device for detecting sand in a conduit - has acoustic transducer in oil filled box attached to pipe exterior Granted FR2254025A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US422618A US3906780A (en) 1972-10-12 1973-12-07 Particulate material detection means

Publications (2)

Publication Number Publication Date
FR2254025A1 true FR2254025A1 (en) 1975-07-04
FR2254025B1 FR2254025B1 (en) 1978-05-05

Family

ID=23675661

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7440107A Granted FR2254025A1 (en) 1973-12-07 1974-12-06 Device for detecting sand in a conduit - has acoustic transducer in oil filled box attached to pipe exterior

Country Status (4)

Country Link
BR (1) BR7410240A (en)
FR (1) FR2254025A1 (en)
MY (1) MY7800135A (en)
NO (1) NO140838C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2304082A1 (en) * 1975-03-10 1976-10-08 Westinghouse Electric Corp HUMIDITY INDICATOR
FR2412840A1 (en) * 1977-12-20 1979-07-20 Shell Int Research METHOD AND DEVICE FOR DETECTING SOLID PARTICLES IN A FLUID FLOWING IN A DUCT, IN PARTICULAR GRAINS OF SAND IN A HYDROCARBON

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2304082A1 (en) * 1975-03-10 1976-10-08 Westinghouse Electric Corp HUMIDITY INDICATOR
FR2412840A1 (en) * 1977-12-20 1979-07-20 Shell Int Research METHOD AND DEVICE FOR DETECTING SOLID PARTICLES IN A FLUID FLOWING IN A DUCT, IN PARTICULAR GRAINS OF SAND IN A HYDROCARBON

Also Published As

Publication number Publication date
BR7410240A (en) 1976-06-08
NO140838B (en) 1979-08-13
FR2254025B1 (en) 1978-05-05
NO140838C (en) 1979-11-21
MY7800135A (en) 1978-12-31
NO744410L (en) 1975-07-07

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Legal Events

Date Code Title Description
ST Notification of lapse