SU868351A1 - Ultrasonic method of measuring article coating thickness - Google Patents
Ultrasonic method of measuring article coating thickness Download PDFInfo
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- SU868351A1 SU868351A1 SU802861747A SU2861747A SU868351A1 SU 868351 A1 SU868351 A1 SU 868351A1 SU 802861747 A SU802861747 A SU 802861747A SU 2861747 A SU2861747 A SU 2861747A SU 868351 A1 SU868351 A1 SU 868351A1
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- USSR - Soviet Union
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- coating
- product
- ultrasonic vibrations
- thickness
- measured
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- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Description
(54) УЛЬТРАЗВУКОВОЙ СПОСОБ ИЗМЕРЕНИЯ ТОЛЩИНЫ ПОКРЫТИЙ ИЗДЕЛИЙ(54) ULTRASONIC METHOD FOR MEASURING THE THICKNESS OF PRODUCT COATINGS
1one
Изобретение относитс к измерительной технике и может быть исполь зовано дл измерени толщины защитных покрытий.The invention relates to a measurement technique and can be used to measure the thickness of protective coatings.
Известен ультразвуковой способ измерени толщины покрытий, основанный на зависимости затухани поверхностных волн от толщины покрыти tij.A known ultrasonic method for measuring the thickness of coatings is based on the dependence of the attenuation of surface waves on the thickness of the coating tij.
Недостатком указанного способа вл етс низка точность, обусловленна трудност ми при измерении толщины покрыти с высоким затуханием.The disadvantage of this method is low accuracy due to difficulties in measuring the thickness of the coating with high attenuation.
Наиболее близким по технической сущности к предлагаемому вл етс ультразвуковой способ измерени : толщины покрьпнК. изделий, заключающийс в том, что устанавливают на изделие со стороны покрыти излучатель ультразвуковых колебаний, ввод т с его помощью в изделие ультразвуковой импульс с широким спектром частот, принимают отраженные сигналы, анализигуют спектр эхо-сигналов и по. изменени м параметров спектра суд т о толщине C IНедостатком известного способа вл етс низка точность измерени покрытий малой толщины, обусловленна сложностью выделени измер емой части эхо-сигнала.The closest in technical essence to the present invention is an ultrasonic method of measurement: the thickness of the rivet. products, which consist in installing an emitter of ultrasonic vibrations on the product from the coating side, inserting an ultrasonic pulse with a wide frequency spectrum into the product, receiving reflected signals, analyzing the spectrum of the echo signals and. Changes in the spectrum parameters are judged on the thickness C. The disadvantage of this method is the low measurement accuracy of thin coatings, due to the difficulty in extracting the measured part of the echo signal.
Цель изобретени - повышение точности измерени покрытий малой толщины .The purpose of the invention is to improve the measurement accuracy of coatings of small thickness.
Поставленна цель достигаетс тем, 5 что располагают между излучателем ультразвуковых колебаний и покрытием слой материала с волновым сопротивлением , равным отношению квадрата .волновому сопротивлению покрыти 0 к волновому сопротивлению издели , вьщел ют эхо-сигнал, отраженный от поверхности покрыти , и по первому частотному минимуму огибающей частотного спектра суд т о толщине 15 измер емого покрыти , которую определ ют из выражени СThe goal is achieved by the fact that between the emitter of ultrasonic vibrations and the coating there is a layer of material with a characteristic impedance equal to the ratio of the square wave resistance of the coating 0 to the characteristic impedance of the product, the echo signal reflected from the surface of the coating the frequency spectrum is judged to be a thickness of 15 measurable coatings, which is determined from the expression C
(1)(one)
где d - толщина измер емого пок20 рыти ;where d is the thickness of the measured surface;
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU802861747A SU868351A1 (en) | 1980-01-02 | 1980-01-02 | Ultrasonic method of measuring article coating thickness |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU802861747A SU868351A1 (en) | 1980-01-02 | 1980-01-02 | Ultrasonic method of measuring article coating thickness |
Publications (1)
Publication Number | Publication Date |
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SU868351A1 true SU868351A1 (en) | 1981-09-30 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU802861747A SU868351A1 (en) | 1980-01-02 | 1980-01-02 | Ultrasonic method of measuring article coating thickness |
Country Status (1)
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SU (1) | SU868351A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2403010A (en) * | 2003-06-16 | 2004-12-22 | Gen Electric | Measuring coated part thickness using delay lines impedance-matched to the coating |
CN114216858A (en) * | 2021-11-25 | 2022-03-22 | 长江存储科技有限责任公司 | Detection method of thin film |
-
1980
- 1980-01-02 SU SU802861747A patent/SU868351A1/en active
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2403010A (en) * | 2003-06-16 | 2004-12-22 | Gen Electric | Measuring coated part thickness using delay lines impedance-matched to the coating |
US7194907B2 (en) | 2003-06-16 | 2007-03-27 | R/D Tech Instruments Inc. | Method for measuring part thickness having an external coating using impedance matching delay lines |
GB2403010B (en) * | 2003-06-16 | 2007-05-30 | Gen Electric | Method and apparatus for measuring part thickness having an external coating using impedance matching delay lines |
CN114216858A (en) * | 2021-11-25 | 2022-03-22 | 长江存储科技有限责任公司 | Detection method of thin film |
CN114216858B (en) * | 2021-11-25 | 2023-11-17 | 长江存储科技有限责任公司 | Method for detecting film |
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