SU868561A1 - Method of flaw detection of ferromagnetic articles - Google Patents
Method of flaw detection of ferromagnetic articles Download PDFInfo
- Publication number
- SU868561A1 SU868561A1 SU772530535A SU2530535A SU868561A1 SU 868561 A1 SU868561 A1 SU 868561A1 SU 772530535 A SU772530535 A SU 772530535A SU 2530535 A SU2530535 A SU 2530535A SU 868561 A1 SU868561 A1 SU 868561A1
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- SU
- USSR - Soviet Union
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- receiving
- flaw detection
- excitation
- magnitude
- product
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
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Изобретение относитс к контрольноизмерительной технике и может быть использовано дл бесконтактной ультразвуковой дефектоскопии изделий из фер-ромагни ных материалов.The invention relates to a measuring technique and can be used for non-contact ultrasonic inspection of products made of ferromagnetic materials.
Известен способ контрол ферромаггнитных материалов, при котором вблизи поверхности издели размещают электро-.« магнитно-акустический преобразователь совмещенного типа и определ ют наличие дефекта по отраженной от него упругой волне, преобразуемой при приеме в электрический сигнал 1.A known method of controlling ferromagnetic materials in which an electrically-magnetic transducer of the combined type is placed near the product surface and the presence of a defect is determined by the elastic wave reflected from it, which is transformed upon reception into an electrical signal 1.
Недостатком этого способа вл етс «5 его относительно низка чувствителыиость вследствие малой той части упругой энергии, котора отражаетс от дефекта и достигает преобразовател .The disadvantage of this method is that it is relatively low in sensitivity due to a small part of the elastic energy that is reflected from the defect and reaches the converter.
Наиболее близким по технической 20 сущности к предлагаемому вл етс способ дефектоскопии ферромагнитных изделий заключающийс в том, что вблизи поверхности контролируемого издели располагают возбуждающий и при&лныЯ 25 электромагнитно-акустические преобразователи таким образом, чтобы их высокочастотные катушки были параллельны: между соббй, пропускают перемеиЦЫЙ ток по катушке возбуждающего пре- 30The closest to the technical essence of the present invention is a method of flaw detection of ferromagnetic products, which consists in the fact that the excitation is located near the surface of the product under test and at 25 amps electromagnetic-acoustic transducers in such a way that their high-frequency coils are parallel: between the assembly, the current is passed over the coil of the exciter 30
образовател и по величине сигнала, снимаемого с приемного преобразовател , суд т о наличии и величине дефекта .the generator and the magnitude of the signal removed from the receiving transducer are judged on the presence and magnitude of the defect.
Этот способ позвол ет повысить чувствительность контрол за счет увеличени числа витков приемного преобразовател или подключени его к приемному тракту через повыиающий трансформатор. В известном способе создают подмагничивание в зонах возбуждени и приема по нормали к поверхности издели 2}. ( Недостатком известного способа вл етс его недостаточно высока чувствительность , котора определ етс также малым вли нием дефекта на буждаемую упругую волнуThis method makes it possible to increase the sensitivity of monitoring by increasing the number of turns of the receiving transducer or connecting it to the receiving path through a step-up transformer. In the known method, magnetization is created in the excitation and reception zones normal to the surface of the product 2}. (The disadvantage of this method is that its sensitivity is not high enough, which is also determined by the small influence of the defect on the elastic wave
Цель изобретени - повышение чувстЁительности контрол .The purpose of the invention is to increase the sensitivity of the control.
Указанна цель достигаетс тем, что изделие в зонах возбуждени и приема намагничивают в двух взаимно перпендикул рных тангенциальных на правлени х .This goal is achieved by the fact that the product in the excitation and reception areas is magnetized in two mutually perpendicular tangential directions.
На чертеже изображено расположение преобразователей относительно издепи , напр9вление полей подмагничивани и блок-схема npif6opa, реализун г цего данный способ.The drawing shows the location of the transducers in relation to the output, the direction of the bias fields and the block diagram of the npif6opa, which implements this method.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772530535A SU868561A1 (en) | 1977-10-03 | 1977-10-03 | Method of flaw detection of ferromagnetic articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU772530535A SU868561A1 (en) | 1977-10-03 | 1977-10-03 | Method of flaw detection of ferromagnetic articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU868561A1 true SU868561A1 (en) | 1981-09-30 |
Family
ID=20727543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU772530535A SU868561A1 (en) | 1977-10-03 | 1977-10-03 | Method of flaw detection of ferromagnetic articles |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU868561A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4593567A (en) * | 1983-09-02 | 1986-06-10 | Betriebsforschungsinstitut Vdeh Institut For Angewandete Forschung Gmbh | Electromagnet transducer |
-
1977
- 1977-10-03 SU SU772530535A patent/SU868561A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4593567A (en) * | 1983-09-02 | 1986-06-10 | Betriebsforschungsinstitut Vdeh Institut For Angewandete Forschung Gmbh | Electromagnet transducer |
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