SU1260670A1 - Method of nondestructive inspection of articles - Google Patents
Method of nondestructive inspection of articles Download PDFInfo
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- SU1260670A1 SU1260670A1 SU843716415A SU3716415A SU1260670A1 SU 1260670 A1 SU1260670 A1 SU 1260670A1 SU 843716415 A SU843716415 A SU 843716415A SU 3716415 A SU3716415 A SU 3716415A SU 1260670 A1 SU1260670 A1 SU 1260670A1
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Изобретение относитс к области неразрушающего контрол и может быть использовано в машиностроении дл определени толщины покрытий и упрочненных покрытий, нанесенных на металлические издели . Цель изобретени - повьшение точности при контроле, покрытий и упрочненных слоев , незначительно отличающихс по магнитным свойствам от материала основы изделий, за счет пространственного и временного разделени полей. На изделие воздействуют двум магнитными пол ми одинаковой амплитуды и частоты, но различной фазы, а толщину покрытий и упрочненных слоев определ ют по разности фаз сигналов магниточувствительных преобразователей . 1 ил. (5 (Л ю Од с О) The invention relates to the field of non-destructive testing and can be used in mechanical engineering to determine the thickness of coatings and hardened coatings applied to metal products. The purpose of the invention is to increase the accuracy of the control, coatings and hardened layers, which are slightly different in magnetic properties from the base material of the products, due to the spatial and temporal separation of the fields. The product is affected by two magnetic fields of the same amplitude and frequency, but of a different phase, and the thickness of the coatings and hardened layers is determined by the phase difference of the signals of a magnetically sensitive transducer. 1 il. (5 (LU Oud with O)
Description
Изобретение относитс к неразрушающему контролю и может быть использовано в машиностроении oit- ределени толщины защитных и упрочн ющих покрытий, нанесенных на ме- таллические издели ,The invention relates to non-destructive testing and can be used in mechanical engineering to determine the thickness of protective and strengthening coatings applied to metal products.
Цель изобретени - повьппение точности при контроле покрытий и упрочненных слоев, незначительно отличающихс по магнитным свойствам от материала основы издели , за счет пространственного и временного разделени магнитных полей.The purpose of the invention is to improve accuracy in the control of coatings and hardened layers, which are slightly different in magnetic properties from the base material of the product, due to the spatial and temporal separation of magnetic fields.
На чертеже представлено устройств дл реализации способа неразрушаю- щего контрол изделий.The drawing shows devices for implementing the method of non-destructive testing of products.
Устройство содер йт электромагнит 1, состо щий из трехстержневого сердечника 2 и возбу адающей обмотки размещенной на крайнем стержне сер- дечника 2, и два магниточувствитель- ных преобразовател 4 и 5, например датчики Холла, размещенные на торцах двух других стержней сердечника 2.The device contains an electromagnet 1, consisting of a three-core core 2 and an excitation winding located at the extreme core of core 2, and two magnetosensitive transducers 4 and 5, such as Hall sensors, placed at the ends of two other cores of core 2.
Способ осуществл етс следующим образом.The method is carried out as follows.
Электромагнит 1 с преобразовател - ми 4 и 5 устанавливают на поверхность издели 6 со стороны покрыти 7. В обмотку 3 электромагнита подают ток. Разность фаз сигналов преобразователей 4 и 5 измер ют с помощью фазометра (не показан).The electromagnet 1 with converters 4 and 5 is installed on the surface of the product 6 from the side of the coating 7. A current is applied to the winding 3 of the electromagnet. The phase difference of the signals of the transducers 4 and 5 is measured with a phase meter (not shown).
Изменение фазы пол на поверхности издели 6, вызванное его вза- имодействием с изделием, определ етс величинами магнитной и диэлектрической проницаемости, электрогфовод ности и объемом материала объекта, перемагничиваемого этим Полем, The change in the phase of the field on the surface of the product 6, caused by its interaction with the product, is determined by the magnitudes of the magnetic and dielectric constant, electrocovigilance and the volume of the material of the object, which is remagnetized by this Field,
Следовательно, фаза сигнала преобразовател 4 остаетс неизменной при изменении толщины покрыти 7 от минимальной до максимальной, поскольку при этом не измен ютс ниConsequently, the phase of the signal of the converter 4 remains unchanged when the thickness of the coating 7 changes from minimum to maximum, since it does not change
5 five
0 0
0 0
5 050
5five
объем, ни физические характеристики промагничиваемого средним стержнем сердечника 2 сло . Таким образом, этот сигнал вл етс опорным, несущим информацию только о свойствах материала покрыти 7.volume, nor physical characteristics of the core 2 magnetized by the middle core. Thus, this signal is a reference, carrying information only about the properties of the material of the coating 7.
Объем материала, промагничиваемого стержнем сердечника 2 с преобразователем 5, при изменении толщины покрыти 7 также не измен етс , но при этом измен ютс электромагнитные характеристики этого объема, а следовательно, измен етс и фаза сигнала преобразовател 5. В результате измер ема разность фаз сигналов датчиков 4 и 5 содержит ин- формацию о разности свойств материалов покрыти 7 и основы, что и позвол ет по величине определ емой разности фаз судить о толщине покрыти .The volume of material magnetized by the core core 2 with converter 5 does not change with a change in the thickness of coating 7, but the electromagnetic characteristics of this volume change and, therefore, the signal phase of converter 5 also changes. As a result, the measured phase difference of sensor signals 4 and 5 contain information on the difference in the properties of the materials of the coating 7 and the substrate, which allows to judge the thickness of the determined phase difference.
Пространственное и временное разделение магнитных полей исключает их взаимное вли ние друг на друга.The spatial and temporal separation of magnetic fields excludes their mutual influence on each other.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU843716415A SU1260670A1 (en) | 1984-03-29 | 1984-03-29 | Method of nondestructive inspection of articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU843716415A SU1260670A1 (en) | 1984-03-29 | 1984-03-29 | Method of nondestructive inspection of articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1260670A1 true SU1260670A1 (en) | 1986-09-30 |
Family
ID=21109586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU843716415A SU1260670A1 (en) | 1984-03-29 | 1984-03-29 | Method of nondestructive inspection of articles |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1260670A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6534975B2 (en) * | 2000-01-15 | 2003-03-18 | Alstom (Switzerland) Ltd | Nondestructive method for determining the thickness of a metallic protective layer on a metallic base material via a different type of layer between the metallic protective layer and the metallic base material |
-
1984
- 1984-03-29 SU SU843716415A patent/SU1260670A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Мельгуй М.А. Магнитный контроль механических свойств сталей. Минск: Наука и тегшика, 1980,с.126. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6534975B2 (en) * | 2000-01-15 | 2003-03-18 | Alstom (Switzerland) Ltd | Nondestructive method for determining the thickness of a metallic protective layer on a metallic base material via a different type of layer between the metallic protective layer and the metallic base material |
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