RU1798617C - Method of measurement of thickness of nonmagnetic coating of ferromagnetic base - Google Patents

Method of measurement of thickness of nonmagnetic coating of ferromagnetic base

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Publication number
RU1798617C
RU1798617C SU894708815A SU4708815A RU1798617C RU 1798617 C RU1798617 C RU 1798617C SU 894708815 A SU894708815 A SU 894708815A SU 4708815 A SU4708815 A SU 4708815A RU 1798617 C RU1798617 C RU 1798617C
Authority
RU
Russia
Prior art keywords
thickness
measurement
domain
diameter
controlled
Prior art date
Application number
SU894708815A
Other languages
Russian (ru)
Inventor
Владимир Павлович Демин
Сергей Иванович Фетисов
Валерий Борисович Миронов
Александр Павлович Демин
Андрей Самуилович Устинов
Original Assignee
Центр научно-технического творчества молодежи "Внедрение"
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 Центр научно-технического творчества молодежи "Внедрение" filed Critical Центр научно-технического творчества молодежи "Внедрение"
Priority to SU894708815A priority Critical patent/RU1798617C/en
Application granted granted Critical
Publication of RU1798617C publication Critical patent/RU1798617C/en

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  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)

Abstract

Изобретение относитс  к средствам контрол  толщины покрытий и может быть использовано в неразрушающем контроле ферромагнитных материалов дл  измерени  толщины упрочненного сло . Цель изобретени  - повышение точности измерений. Поставленна  цель достигаетс  тем, что магнитна  пленка с управл емой доменной структурой, размещенна  на контролируемой поверхности, снабжена кольцеобразным магнитом, расположенным параллельно плоскости магнитной пленки. В пол ризованном свете наблюдают изменение диаметра цилиндрического домена и измер ют его, при этом диаметр домена пропорционален толщине немагнитного покрыти . 1 ил.The invention relates to means for controlling the thickness of coatings and can be used in non-destructive testing of ferromagnetic materials to measure the thickness of the hardened layer. The purpose of the invention is to improve the accuracy of measurements. The goal is achieved in that a magnetic film with a controlled domain structure located on a controlled surface is provided with an annular magnet located parallel to the plane of the magnetic film. In polarized light, a change in the diameter of the cylindrical domain is observed and measured, the diameter of the domain being proportional to the thickness of the non-magnetic coating. 1 ill.

Description

(Л(L

СWITH

Изобретение относитс  к средствам контрол  толщины покрытий и может быть использовано в неразрушающем контроле ферромагнитных материалов дл  измерени  толщины упрочненного сло .The invention relates to means for controlling the thickness of coatings and can be used in non-destructive testing of ferromagnetic materials to measure the thickness of the hardened layer.

Цель изобретени  - повышение точности измерений.The purpose of the invention is to improve the accuracy of measurements.

На чертеже приведена структурна  схема устройства, реализующего способ.The drawing shows a structural diagram of a device that implements the method.

Устройство состоит из магнитной плен- ки с управл емой доменной структурой 1, расположенной на контролируемой поверхности 2, покрывающей магнитное основание 3. Кольцеобразный магнит 4 находитс  сверху магнитной пленки. На магнитной пленке создаетс  домен цилиндрической формы, который наблюдают в пол ризованном свете через блок визуализации 5. Изме- р ют диаметр домена, которыйThe device consists of a magnetic film with a controlled domain structure 1 located on a controlled surface 2 covering the magnetic base 3. An annular magnet 4 is located on top of the magnetic film. A cylindrical domain is created on the magnetic film and observed in polarized light through imaging unit 5. The diameter of the domain is measured.

пропорционален толщине немагнитного покрыти .proportional to the thickness of the non-magnetic coating.

Claims (1)

Формула изобретени  Способ измерени  толщины немагнитного покрыти  на ферромагнитном основании , заключающийс  в том, что посто нный магнит располагают над поверхностью контролируемого издели  и по изменению напр женности магнитного пол  суд т о толщине, отличающийс  тем, что, с целью повышени  точности измерени  толщины , используют кольцевой магнит, между его торцем и контролируемой поверхностью размещают ферромагнитную пленку с управл емой доменной структурой, а величину изменени  напр женности магнитного пол  определ ют по диаметру образующегос  в ферромагнитной пленке цилиндрического домена.SUMMARY OF THE INVENTION A method for measuring the thickness of a non-magnetic coating on a ferromagnetic base, namely, that a permanent magnet is placed above the surface of the product to be monitored and the thickness is determined by the change in the magnetic field strength, characterized in that an annular magnet is used to increase the accuracy of the thickness measurement a magnet, a ferromagnetic film with a controlled domain structure is placed between its end and the controlled surface, and the magnitude of the change in the magnetic field strength is determined by the diameter of the cylindrical domain formed in the ferromagnetic film. х|x | О 00About 00 оabout мйmy V)V) Wtf//7////%WWtf // 7 ////% W -J-J
SU894708815A 1989-05-10 1989-05-10 Method of measurement of thickness of nonmagnetic coating of ferromagnetic base RU1798617C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU894708815A RU1798617C (en) 1989-05-10 1989-05-10 Method of measurement of thickness of nonmagnetic coating of ferromagnetic base

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU894708815A RU1798617C (en) 1989-05-10 1989-05-10 Method of measurement of thickness of nonmagnetic coating of ferromagnetic base

Publications (1)

Publication Number Publication Date
RU1798617C true RU1798617C (en) 1993-02-28

Family

ID=21455910

Family Applications (1)

Application Number Title Priority Date Filing Date
SU894708815A RU1798617C (en) 1989-05-10 1989-05-10 Method of measurement of thickness of nonmagnetic coating of ferromagnetic base

Country Status (1)

Country Link
RU (1) RU1798617C (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство СССР N 1262354, кл. G 01 N 27/90, 1985. А.М.Валитов и Г.И.Шилов. Приборы и методы контрол толщины покрытий. Л.: Машиностроение, 1970, с.7-9, *

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