SU871056A1 - Electromagnetic method of measuring ferromagnetic-based non-magnetic electroconductive coating thickness - Google Patents
Electromagnetic method of measuring ferromagnetic-based non-magnetic electroconductive coating thickness Download PDFInfo
- Publication number
- SU871056A1 SU871056A1 SU792817914A SU2817914A SU871056A1 SU 871056 A1 SU871056 A1 SU 871056A1 SU 792817914 A SU792817914 A SU 792817914A SU 2817914 A SU2817914 A SU 2817914A SU 871056 A1 SU871056 A1 SU 871056A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- coating thickness
- based non
- electromagnetic method
- electroconductive coating
- magnetic electroconductive
- Prior art date
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Description
от вихревых токов в контролируемом покрытии дл низкочастотного и высокочастотного преобразователей.from eddy currents in a controlled coating for low-frequency and high-frequency converters.
Способ реализуетс следующим образом . Паргилетры вихревых тОков преобразователей , например число их витков, выбираютс таким образом, что напр жени холостого хода обои преобразователей на соответствующих частатах - высшей fg и низшей равны. При взаимодействии вихретоковых преобразователей с объектом контрол равенство выходнь х напр жений преобразователей нарушаетс из-за нелинейной зависимости вносимых напр жений от толщины покрыти . Величина , например, низшей частоты измен етс до получени равества гилплитуд вносимых напр жений высшей н низшей частот. По полученной величине Afц низшей частоты суд т о контролируемом параметре, так как величина л€ц однозначно св зана с толщиной контролируемого покрыти .The method is implemented as follows. The pargilletres of the eddy currents of the transducers, for example, the number of their turns, are chosen in such a way that the no-load voltages of the transducers wallpaper on the respective parts — the highest fg and the lowest — are equal. In the interaction of eddy current transducers with an object of control, the equality of the output voltages of the transducers is disturbed due to the nonlinear dependence of the applied stresses on the thickness of the coating. The magnitude, for example, of the lower frequency, changes until the equalities of applied voltages of the higher and lower frequencies are equal. Based on the obtained low frequency value Afc, the controlled parameter is judged, since the value of l € q is unambiguously related to the thickness of the controlled coating.
Данный способ позвол ет существенно упростить функцию преобразовани сигналов высшей и низщей частот и, следовательно, повысить точность измерений толщины немагнитных электропровод щих покрытий на ферромагнитном основании.This method significantly simplifies the function of converting high and low frequency signals and, consequently, improves the accuracy of measuring the thickness of nonmagnetic electrically conductive coatings on a ferromagnetic basis.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792817914A SU871056A1 (en) | 1979-09-03 | 1979-09-03 | Electromagnetic method of measuring ferromagnetic-based non-magnetic electroconductive coating thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792817914A SU871056A1 (en) | 1979-09-03 | 1979-09-03 | Electromagnetic method of measuring ferromagnetic-based non-magnetic electroconductive coating thickness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU871056A1 true SU871056A1 (en) | 1981-10-07 |
Family
ID=20849885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU792817914A SU871056A1 (en) | 1979-09-03 | 1979-09-03 | Electromagnetic method of measuring ferromagnetic-based non-magnetic electroconductive coating thickness |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU871056A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4703265A (en) * | 1984-02-17 | 1987-10-27 | Tornbloms Kvalitetskontroll Ab | Method and apparatus for compensating for different depths of sun currents induced in the object tested for imperfections |
| US5525903A (en) * | 1993-08-18 | 1996-06-11 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Eddy current method of acquiring the surface layer properties of a metallic target |
-
1979
- 1979-09-03 SU SU792817914A patent/SU871056A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4703265A (en) * | 1984-02-17 | 1987-10-27 | Tornbloms Kvalitetskontroll Ab | Method and apparatus for compensating for different depths of sun currents induced in the object tested for imperfections |
| US5525903A (en) * | 1993-08-18 | 1996-06-11 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Eddy current method of acquiring the surface layer properties of a metallic target |
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