GB2117912A - Method and device for measuring the thickness of a ferromagnetic layer - Google Patents
Method and device for measuring the thickness of a ferromagnetic layerInfo
- Publication number
- GB2117912A GB2117912A GB08313361A GB8313361A GB2117912A GB 2117912 A GB2117912 A GB 2117912A GB 08313361 A GB08313361 A GB 08313361A GB 8313361 A GB8313361 A GB 8313361A GB 2117912 A GB2117912 A GB 2117912A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ferromagnetic layer
- thickness
- measuring
- magnetic
- magnetic field
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
-
- 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
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
- G01B7/105—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance for measuring thickness of coating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
A method of measuring the thickness of a ferromagnetic layer, implemented by means of a device for measuring the thickness of a ferromagnetic layer, consists in magnetizing the ferromagnetic layer (6) with a non-uniform local magnetic field generated from an area (3) of magnetic non-uniformity of the magnetic shunt (2) of a magnetic system (1). Then the reaction of the local non-uniform magnetic field of the area (3) of magnetic non-uniformity to the magnetic field of the ferromagnetic layer (6) is measured and the thickness of the ferromagnetic layer (6) is determined through the reading of an indicator (7).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU813344807A SU1048302A1 (en) | 1981-10-05 | 1981-10-05 | Method of measuring thickness of ferromagnetic articles and coats |
PCT/SU1982/000029 WO1983001302A1 (en) | 1981-10-05 | 1982-08-31 | Method and device for measuring the thickness of a ferromagnetic layer |
Publications (2)
Publication Number | Publication Date |
---|---|
GB8313361D0 GB8313361D0 (en) | 1983-06-22 |
GB2117912A true GB2117912A (en) | 1983-10-19 |
Family
ID=20979253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08313361A Withdrawn GB2117912A (en) | 1981-10-05 | 1982-08-31 | Method and device for measuring the thickness of a ferromagnetic layer |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS58501640A (en) |
GB (1) | GB2117912A (en) |
SU (1) | SU1048302A1 (en) |
WO (1) | WO1983001302A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1773930C3 (en) * | 1968-07-27 | 1974-09-26 | Heltuin 7411 Reutlingenbetzingen Mooser | Magnetic method for the discovery and localization of defects in steel pipes and sheet metal a |
FR2083751A6 (en) * | 1970-03-26 | 1971-12-17 | Lignes Telegraph Telephon | |
DE2049976B2 (en) * | 1970-10-12 | 1972-09-21 | Elektro-Physik Hans Nix & Dr.-Ing. E. Steingroever KG, 5000 Köln | METHOD FOR MEASURING THE THICKNESS OF LAYERS IN CONSTRUCTION AND DEVICE FOR CARRYING OUT THE METHOD |
GB2067766B (en) * | 1980-01-15 | 1984-07-04 | Bicc Ltd | Testing elongate bodies of ferrous metals |
-
1981
- 1981-10-05 SU SU813344807A patent/SU1048302A1/en active
-
1982
- 1982-08-31 GB GB08313361A patent/GB2117912A/en not_active Withdrawn
- 1982-08-31 WO PCT/SU1982/000029 patent/WO1983001302A1/en active Application Filing
- 1982-08-31 JP JP50348582A patent/JPS58501640A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO1983001302A1 (en) | 1983-04-14 |
GB8313361D0 (en) | 1983-06-22 |
JPS58501640A (en) | 1983-09-29 |
SU1048302A1 (en) | 1983-10-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1525310A (en) | Method and apparatus for measuring the current flowing in a workpiece | |
DE3271655D1 (en) | Device for the non-destructive testing of ferromagnetic objects | |
GB1539313A (en) | Magnetic testing devices for detecting defects in magnetically permeable elongate objects | |
EP0176932A3 (en) | Method and apparatus for the non-destructive testing of ferromagnetic bodies by means of magnetisation | |
JPS522452A (en) | Method and apparatus for measuring plate thickness | |
GB2117912A (en) | Method and device for measuring the thickness of a ferromagnetic layer | |
JPS5342762A (en) | Radiation measuring apparatus | |
ZA821958B (en) | Process and device for non-destructive testing by eddy currents | |
JPS52119970A (en) | Sound measuring apparatus | |
JPS5672309A (en) | Measuring method of three-dimension measuring device and reference point block for its measurement | |
JPS5233756A (en) | Device for measuring the thickness of plate and the like | |
JPS5651681A (en) | Measuring instrument for magnetic characteristic | |
JPS5626253A (en) | Testing device for plane magnetic film and testing method using said device | |
JPS5342002A (en) | Method for inspection of magnetic recording medium | |
JPS56112602A (en) | Measuring device for thickness of nonmagnetic thin metal plate | |
JPS5357089A (en) | Magnetic field generator for measurement device using electromagneticultrasonic waves | |
JPS5224573A (en) | Method and apparatus for measuring concentrations of fluorescent magnetic poder liquid | |
JPS51134685A (en) | Fluid softness measurement method | |
JPS52151044A (en) | Length measuring apparatus of steel materials | |
JPS5296588A (en) | Non-destructive steel material inspecting method and apparatus | |
JPS5384795A (en) | Inspecting apparatus for corner part of magnetic inspector of square steel material | |
JPS534584A (en) | Detecting system for passage of moving body through fixed point | |
JPS533883A (en) | Eddy current inspecting apparatus | |
JPS5529740A (en) | Detecting method for nodule of steel fiber contained in concrete | |
JPS5360535A (en) | Detection of magnetic material by magnetic modulator of even higher harmonictype |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |