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 probeInfo
- 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
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.
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)
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)
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 |
-
1976
- 1976-07-23 FR FR7622679A patent/FR2359419A1/en active Granted
Patent Citations (3)
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)
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 |