GB1070859A - Apparatus for the measurement of changes in diameter of wire or tubular metal and a method for the determination of the corrosion of such metal - Google Patents
Apparatus for the measurement of changes in diameter of wire or tubular metal and a method for the determination of the corrosion of such metalInfo
- Publication number
- GB1070859A GB1070859A GB137765A GB137765A GB1070859A GB 1070859 A GB1070859 A GB 1070859A GB 137765 A GB137765 A GB 137765A GB 137765 A GB137765 A GB 137765A GB 1070859 A GB1070859 A GB 1070859A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wire
- solenoid
- metal
- diameter
- tube
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/12—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
- G01B7/125—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters of objects while moving
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
1,070,859. Determining linear dimensions of electrically conductive wires or tubes. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N. V. March 31, 1965 [April 2, 1964], No. 13677/65. Heading G1N. The change in the diameter of a metal wire or the wall thickness of a tube (e.g. due to corrosion by gasoline) is determined by inducing eddy currents in the metal using an apparatus comprising a bridge circuit (Fig. 1) one arm of which includes a solenoid 3, through which the wire or tube 4 is passed by guide rollers 5, and forming with a capacitor 6 a tuned circuit which is resonant at the input frequency (e. g. 10<SP>5</SP>-10<SP>8</SP> c.p. s.). Another arm includes a reference impedance L7, R8, C9 which is also tuned to the input frequency. Decreases in diameter of 0À5 microns can be detected, the unbalanced bridge output voltage produced by the change in dimension providing a measure thereof which may be recorded as a function of time in a recorder 12. The reference impedance may also include a solenoid within which a reference wire or tube is placed. If the wire or tube is ferromagnetic a permanent magnet may be fitted inside the solenoid to magnetically saturate any ferromagnetic material in the vicinity thereof, so that magnetic effects due to the wire on the impedance of the solenoid will be eliminated. The apparatus may comprise a number of solenoids mounted on the circumference of a rotatable disc (not shown) for testing wires of different diameters a solenoid bore being preferably at the most twice the diameter of a wire. Rotation of the disc to a selected position may also switch on a power source of having a frequency appropriate to the metal under test. Circuit diagrams Figs. 3a, 3b, 3c (not shown) of the high frequency generators and measuring bridge together with component values, are given. The bridge arms may have rectifiers 13, 14 whereby the bridge output will be a direct voltage independent of any phase difference between the currents in the two bridge arms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR45591A FR1463466A (en) | 1965-01-12 | 1965-02-04 | Coupling in particular for rotating mechanical tools fitted with a detachable accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6403501A NL6403501A (en) | 1964-04-02 | 1964-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1070859A true GB1070859A (en) | 1967-06-07 |
Family
ID=19789707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB137765A Expired GB1070859A (en) | 1964-04-02 | 1965-01-12 | Apparatus for the measurement of changes in diameter of wire or tubular metal and a method for the determination of the corrosion of such metal |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE661856A (en) |
| CH (1) | CH436785A (en) |
| DE (1) | DE1598989A1 (en) |
| GB (1) | GB1070859A (en) |
| NL (1) | NL6403501A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2847763A1 (en) * | 1977-11-04 | 1979-05-10 | Snecma | METHOD OF MEASURING THE WALL THICKNESS OF GAS TURBINE BLADES |
| FR2531527A1 (en) * | 1982-08-06 | 1984-02-10 | Australian Wire Ind Pty | METHOD AND APPARATUS FOR DETERMINING THE COATING THICKNESS |
| GB2124778A (en) * | 1982-08-04 | 1984-02-22 | Pa Inc | Method and apparatus for magnetically checking the wall thickness of a ferromagnetic element |
| EP0127443A2 (en) * | 1983-05-23 | 1984-12-05 | The National Grid Company plc | Cable corrosion monitor |
| CN102808613A (en) * | 2012-08-01 | 2012-12-05 | 中国海洋石油总公司 | Calibration method of magnetoresistive angle sensor of caliper logging unit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1163522B (en) * | 1983-06-15 | 1987-04-08 | Cise Spa | METER BODY SURFACE AND SUB-SURFACE DEFECTS METER ABOVE CURIE TEMPERATURE |
-
1964
- 1964-04-02 NL NL6403501A patent/NL6403501A/xx unknown
-
1965
- 1965-01-12 GB GB137765A patent/GB1070859A/en not_active Expired
- 1965-03-31 CH CH440965A patent/CH436785A/en unknown
- 1965-03-31 DE DE19651598989 patent/DE1598989A1/en active Pending
- 1965-03-31 BE BE661856D patent/BE661856A/xx unknown
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2847763A1 (en) * | 1977-11-04 | 1979-05-10 | Snecma | METHOD OF MEASURING THE WALL THICKNESS OF GAS TURBINE BLADES |
| GB2124778A (en) * | 1982-08-04 | 1984-02-22 | Pa Inc | Method and apparatus for magnetically checking the wall thickness of a ferromagnetic element |
| FR2531527A1 (en) * | 1982-08-06 | 1984-02-10 | Australian Wire Ind Pty | METHOD AND APPARATUS FOR DETERMINING THE COATING THICKNESS |
| GB2124779A (en) * | 1982-08-06 | 1984-02-22 | Australian Wire Ind Pty | Determination of coating thickness |
| US4593244A (en) * | 1982-08-06 | 1986-06-03 | Australian Wire Industries Pty. Ltd. | Determination of the thickness of a coating on a highly elongated article |
| EP0127443A2 (en) * | 1983-05-23 | 1984-12-05 | The National Grid Company plc | Cable corrosion monitor |
| EP0127443A3 (en) * | 1983-05-23 | 1986-07-16 | The National Grid Company plc | Cable corrosion monitor |
| CN102808613A (en) * | 2012-08-01 | 2012-12-05 | 中国海洋石油总公司 | Calibration method of magnetoresistive angle sensor of caliper logging unit |
| CN102808613B (en) * | 2012-08-01 | 2015-04-29 | 中国海洋石油总公司 | Calibration method of magnetoresistive angle sensor of caliper logging unit |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6403501A (en) | 1965-10-04 |
| CH436785A (en) | 1967-05-31 |
| BE661856A (en) | 1965-09-30 |
| DE1598989A1 (en) | 1970-10-29 |
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