SU1379621A1 - Method of measuring thickness of polymer coatings using ultrasound - Google Patents
Method of measuring thickness of polymer coatings using ultrasound Download PDFInfo
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- SU1379621A1 SU1379621A1 SU864109428A SU4109428A SU1379621A1 SU 1379621 A1 SU1379621 A1 SU 1379621A1 SU 864109428 A SU864109428 A SU 864109428A SU 4109428 A SU4109428 A SU 4109428A SU 1379621 A1 SU1379621 A1 SU 1379621A1
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- USSR - Soviet Union
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- waves
- thickness
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- transverse
- fixed distance
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- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Изобретение касаетс ультразвуковых измерений и может быть использовано дл неразрушающего контрол толщины полимерных покрытий. Цель изобретени - повышение точности измерени за счет исключени вли ни размеров акустического преп тстви . Излучающим преобразователем возбуждают импульсы поверхностных ультразвуковых волн, принимают их приемным преобразователем, установленным на фиксированном рассто нии от излучающего и за акустическим преп тствием, созданным путем нагрева поверхности полимерного покрыти и предназначенным дл трансформации поверхностных волн в поперечные. Принимают приемным преобразователем импульсы многократного отражени поперечных волн от противоположной поверхности издели . По фиксированному рассто нию между преобразовател ми, по измеренному времени распространени поверхностных волн между преобразовател ми и по времени распространени поперечных волн между поверхност ми контролируемого издели определ ют толщину последнего. 1 ил. с (ЛThe invention relates to ultrasound measurements and can be used for non-destructive testing of the thickness of polymer coatings. The purpose of the invention is to improve the measurement accuracy by eliminating the influence of the dimensions of the acoustic obstacle. The radiating transducer excites pulses of surface ultrasonic waves, take them as a receiving transducer mounted at a fixed distance from the radiating and behind an acoustic obstacle created by heating the surface of the polymer coating and intended to transform the surface waves into transverse waves. The receiving transducer receives pulses of multiple reflection of transverse waves from the opposite surface of the product. The thickness of the latter is determined by the fixed distance between the transducers, the measured time of propagation of surface waves between the transducers, and the time of propagation of transverse waves between the surfaces of the tested product. 1 il. with (L
Description
Изобретение относитс к области ультразвуковых измерений и может быть использовано дл неразрушающего контрол толщины полимерных покрытий, The invention relates to the field of ultrasonic measurements and can be used for non-destructive control of the thickness of polymer coatings,
Цель изобретени - повышение точности измерени .The purpose of the invention is to improve the measurement accuracy.
На чертеже представлена схема, по сн юща способ измерени толщины полимерного покрыти .The drawing shows a diagram explaining a method for measuring the thickness of a polymer coating.
На схеме изображены излучающий преобразователь 1, приемный преобразователь 2, расположенные на фиксированном рассто нии друг от друга, акустическое преп тствие 3, создан- ное путем нагрева поверхности полимерного покрыти 4. Акустическое преп тствие расположено между излучающим 1 и приемным 2 преобразовател ми .The diagram shows a radiating transducer 1, a receiving transducer 2 located at a fixed distance from each other, an acoustic obstacle 3 created by heating the surface of the polymer coating 4. The acoustic obstacle is located between the radiating 1 and the receiving 2 converters.
Способ осуществл етс следующим .образом.The method is carried out as follows.
Часть поверхностной волны, возбуждаемой преобразователем 1, дойд до преп тстви 3, созданного путем разогрева поверхности полимерного покрыти 4, например, с помощью электромагнитного излучени , трансформируетс в поперечную волну, котора , многократно отража сь от его поверхностей , принимаетс преобразователем 2. Прин тые поперечные ультразвуковы волны регистрируют в виде серии импульсов . Интервал времени между лю- быми двум соседними импульсами соответствует прохождению двойной толщин покрыти 4.A part of the surface wave, excited by the transducer 1, reached obstacle 3, created by heating the surface of the polymer coating 4, for example, using electromagnetic radiation, is transformed into a transverse wave, which, being repeatedly reflected from its surfaces, is received by the transducer 2. Received transverse ultrasound waves are recorded as a series of pulses. The time interval between any two adjacent pulses corresponds to the passage of double thickness of the coating 4.
Друга часть знергии поверхностно ультразвуковой волны принимаетс npe образователем 2 после прохождени ею фиксированного рассто ни . По соотношению между этим рассто нием и временем распространени поверхностных волн определ ют их скорость, ис- ход из чего по времени между импульсами отраженной поперечной волны суд т о толщине полимерного покрыти . С учетом низкого затухани поверхностных волн рассто ние между преобразовател ми можно выбрать гораздо большим, чем размеры акустического преп тстви , в результате чего погрешность определени скорости поверхностных волн, а следовательно, и скорости поперечных волн уменьщаетс Таким образом, повьшхаетс точност измерени толщины полимерного покрыти по известным скорости поперечных волн и временному промежутку между импульсами этих волн, отраженных от противоположной поверхности покрыти .The other part of the surface-ultrasound wave energy is received by the npe generator 2 after it has traveled a fixed distance. The ratio between this distance and the time of propagation of surface waves determines their speed, the outcome of which the thickness of the polymer coating is judged by the time between the pulses of the reflected shear wave. Taking into account the low attenuation of surface waves, the distance between the transducers can be chosen much larger than the dimensions of the acoustic impedance, resulting in an error in determining the velocity of surface waves, and consequently, the velocity of the transverse waves decreases. Thus, the accuracy of measuring the thickness of the polymer coating by known the velocity of the transverse waves and the time interval between the pulses of these waves reflected from the opposite surface of the coating.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU864109428A SU1379621A1 (en) | 1986-06-16 | 1986-06-16 | Method of measuring thickness of polymer coatings using ultrasound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU864109428A SU1379621A1 (en) | 1986-06-16 | 1986-06-16 | Method of measuring thickness of polymer coatings using ultrasound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1379621A1 true SU1379621A1 (en) | 1988-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU864109428A SU1379621A1 (en) | 1986-06-16 | 1986-06-16 | Method of measuring thickness of polymer coatings using ultrasound |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1379621A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2625261C1 (en) * | 2016-07-18 | 2017-07-12 | Общество с ограниченной ответственностью "Нординкрафт Санкт-Петербург" | Method for determining thickness of two-layer materials and their constituent layers by means of elastic wave pulses introduced into control object and ultrasonic converter for its implementation |
| RU2688032C2 (en) * | 2014-10-17 | 2019-05-17 | Рено С.А.С. | Method and device for diagnosing quality of laser welded seam |
-
1986
- 1986-06-16 SU SU864109428A patent/SU1379621A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Авторское свидетельство СССР 372432, кл. G 01 В 17/02, 1973. Авторское свидетельство СССР № 567951, кл. G 01 В 17/02, 1977. * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2688032C2 (en) * | 2014-10-17 | 2019-05-17 | Рено С.А.С. | Method and device for diagnosing quality of laser welded seam |
| RU2625261C1 (en) * | 2016-07-18 | 2017-07-12 | Общество с ограниченной ответственностью "Нординкрафт Санкт-Петербург" | Method for determining thickness of two-layer materials and their constituent layers by means of elastic wave pulses introduced into control object and ultrasonic converter for its implementation |
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