FR2359419A1 - Monitoring changing parameters in inaccessible environments - e.g., corrosion in reactors, by detecting change in resonant frequency of vibrating probe - Google Patents

Monitoring changing parameters in inaccessible environments - e.g., corrosion in reactors, by detecting change in resonant frequency of vibrating probe

Info

Publication number
FR2359419A1
FR2359419A1 FR7622679A FR7622679A FR2359419A1 FR 2359419 A1 FR2359419 A1 FR 2359419A1 FR 7622679 A FR7622679 A FR 7622679A FR 7622679 A FR7622679 A FR 7622679A FR 2359419 A1 FR2359419 A1 FR 2359419A1
Authority
FR
France
Prior art keywords
probe
resonant frequency
corrosion
monitored
reactors
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
FR7622679A
Other languages
French (fr)
Other versions
FR2359419B1 (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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to FR7622679A priority Critical patent/FR2359419A1/en
Publication of FR2359419A1 publication Critical patent/FR2359419A1/en
Application granted granted Critical
Publication of FR2359419B1 publication Critical patent/FR2359419B1/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
    • G01N29/12—Analysing solids by measuring frequency or resonance of acoustic waves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • 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
    • G01N29/02—Analysing fluids
    • G01N29/036—Analysing fluids by measuring frequency or resonance of acoustic waves
    • 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
    • G01N2291/028—Material parameters
    • G01N2291/02881—Temperature

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Pathology (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Mechanical Engineering (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)

Abstract

A probe is caused to vibrate from an external energy source, and its resonant frequency monitored. Changes in environmental parameters cause a change in the resonant frequency and can thereby be detected and monitored. A probe may take the form of a strip or bar or circular section, and may, e.g. be made of the material whose corrosion rate is to be monitored. The probe is vibrated at a frequency of 0.3-3.0 Hz by an externally mounted electrically driven energy source, connected to the probe by a rigid coupling. Used for on-line monitoring of corrosion or solids deposition within chemical reactors or equipment such as turbines or compressors and for the detection of ice formation outside buildings or on aircraft wings. Monitoring in inaccessible situations is readily possible so that expensive plant shut-downs for internal inspection are minimised.
FR7622679A 1976-07-23 1976-07-23 Monitoring changing parameters in inaccessible environments - e.g., corrosion in reactors, by detecting change in resonant frequency of vibrating probe Granted FR2359419A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7622679A FR2359419A1 (en) 1976-07-23 1976-07-23 Monitoring changing parameters in inaccessible environments - e.g., corrosion in reactors, by detecting change in resonant frequency of vibrating probe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7622679A FR2359419A1 (en) 1976-07-23 1976-07-23 Monitoring changing parameters in inaccessible environments - e.g., corrosion in reactors, by detecting change in resonant frequency of vibrating probe

Publications (2)

Publication Number Publication Date
FR2359419A1 true FR2359419A1 (en) 1978-02-17
FR2359419B1 FR2359419B1 (en) 1981-10-09

Family

ID=9176114

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7622679A Granted FR2359419A1 (en) 1976-07-23 1976-07-23 Monitoring changing parameters in inaccessible environments - e.g., corrosion in reactors, by detecting change in resonant frequency of vibrating probe

Country Status (1)

Country Link
FR (1) FR2359419A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991005999A2 (en) * 1989-10-20 1991-05-02 University Of Strathclyde Apparatus for assessing a particular property in a medium
US5296374A (en) * 1989-10-20 1994-03-22 University Of Strathclyde Apparatus for assessing a particular property in a medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056284A (en) * 1958-11-03 1962-10-02 Pure Oil Co Scale and corrosion-measuring device and method
US3253219A (en) * 1961-06-01 1966-05-24 Union Oil Co Method using change of piezoelectric crystal frequency to determine corrosion rate and apparatus therefor
FR2072420A5 (en) * 1969-11-25 1971-09-24 Euratom

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056284A (en) * 1958-11-03 1962-10-02 Pure Oil Co Scale and corrosion-measuring device and method
US3253219A (en) * 1961-06-01 1966-05-24 Union Oil Co Method using change of piezoelectric crystal frequency to determine corrosion rate and apparatus therefor
FR2072420A5 (en) * 1969-11-25 1971-09-24 Euratom

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991005999A2 (en) * 1989-10-20 1991-05-02 University Of Strathclyde Apparatus for assessing a particular property in a medium
WO1991005999A3 (en) * 1989-10-20 1993-02-18 Univ Strathclyde Apparatus for assessing a particular property in a medium
US5296374A (en) * 1989-10-20 1994-03-22 University Of Strathclyde Apparatus for assessing a particular property in a medium

Also Published As

Publication number Publication date
FR2359419B1 (en) 1981-10-09

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Legal Events

Date Code Title Description
ST Notification of lapse