RU2012145236A - Термографический способ контроля и контрольная установка для осуществления способа - Google Patents
Термографический способ контроля и контрольная установка для осуществления способа Download PDFInfo
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Abstract
1. Термографический способ контроля для выявления с локальным разрешением и идентификации близких к поверхности дефектов в контролируемом объекте, содержащий следующие шаги:нагревают участок контролируемого объекта с созданием термического неравновесия между пораженными дефектами дефектными областями и бездефектным материалом контролируемого объекта, причем обеспечивают отсутствие нагрева бездефектного окружения дефектной области или его менее сильный нагрев, по сравнению с нагревом дефектной области;регистрируют последовательность следующих друг за другом с временным интервалом термографических изображений в пределах фазы распространения тепла, которая начинается, когда тепловой поток от локально нагретой дефектной области становится заметным в окружении дефектной области, причем каждое термографическое изображение представляет локальное распределение температуры в зарегистрированной термографическим изображением области поверхности контролируемого объекта;определяют, из термографических изображений, расположенные в правильном позиционном положении температурные профили, причем температурный профиль является профилем с локальным разрешением, в котором к различным позициям в пределах температурного профиля относят измеренную величину, представляющую температуру в соответствующей позиции, при этом каждый расположенный в правильном позиционном положении температурный профиль относится к одной и той же области измерений поверхности контролируемого объекта;определяют, из температурных профилей для множества зарегистрированных температурными профилями позиций измерений в об
Claims (10)
1. Термографический способ контроля для выявления с локальным разрешением и идентификации близких к поверхности дефектов в контролируемом объекте, содержащий следующие шаги:
нагревают участок контролируемого объекта с созданием термического неравновесия между пораженными дефектами дефектными областями и бездефектным материалом контролируемого объекта, причем обеспечивают отсутствие нагрева бездефектного окружения дефектной области или его менее сильный нагрев, по сравнению с нагревом дефектной области;
регистрируют последовательность следующих друг за другом с временным интервалом термографических изображений в пределах фазы распространения тепла, которая начинается, когда тепловой поток от локально нагретой дефектной области становится заметным в окружении дефектной области, причем каждое термографическое изображение представляет локальное распределение температуры в зарегистрированной термографическим изображением области поверхности контролируемого объекта;
определяют, из термографических изображений, расположенные в правильном позиционном положении температурные профили, причем температурный профиль является профилем с локальным разрешением, в котором к различным позициям в пределах температурного профиля относят измеренную величину, представляющую температуру в соответствующей позиции, при этом каждый расположенный в правильном позиционном положении температурный профиль относится к одной и той же области измерений поверхности контролируемого объекта;
определяют, из температурных профилей для множества зарегистрированных температурными профилями позиций измерений в области измерений, диаграммы изменения во времени температурных значений; и
оценивают диаграммы изменения во времени, по меньшей мере, по одному из критериев оценки, характеризующему тепловой поток в области измерений.
2. Способ по п.1, отличающийся тем, что для указанной оценки определяют, по меньшей мере, один локальный максимум температурных значений в пределах температурного профиля.
3. Способ по п.2, отличающийся тем, что при оценке оценивают процесс изменения во времени амплитуды температурных значений в области локального максимума.
4. Способ по п.2 или 3, отличающийся тем, что при оценке определяют величину концентрации тепла в области локального максимума температурных значений в пределах температурного профиля и оценивают процесс изменения во времени величины концентрации количества тепла.
5. Способ по п.1, отличающийся тем, что при оценке оценивают совместно, по меньшей мере, три, предпочтительно от четырех до двадцати расположенных в правильном позиционном положении температурных профилей.
6. Способ по п.1, отличающийся тем, что создают, для контроля длинномерного контролируемого объекта, относительное движение между контролируемым объектом и регистрирующим устройством для регистрации термографических изображений, предпочтительно в направлении движения, параллельном продольному направлению контролируемого объекта, таким образом, что регистрируемые термографическими изображениями области поверхности смещены относительно друг друга в направлении движения, причем области поверхности снятых непосредственно друг за другом термографических изображений предпочтительно перекрываются в области перекрытия.
7. Способ по п.6, отличающийся тем, что регистрирующее устройство установлено неподвижно, а длинномерный контролируемый объект перемещают относительно регистрирующего устройства.
8. Способ п.6, отличающийся тем, что выполняют следующие шаги: анализируют зарегистрированное в первый момент времени первое термографическое изображение последовательности термографических изображений для идентификации, по меньшей мере, одного первого найденного участка изображения, который содержит участок поверхности с похожим на дефект отклонением; автоматически определяют соответствующий первому участку изображения второй участок изображения во втором термографическом изображении, зарегистрированном в более поздний второй момент времени с временным интервалом после первого термографического изображения; совместно оценивают термографические данные первого участка изображения и второго участка изображения; при этом предпочтительно при идентификации похожих на дефекты отклонений определяют локальный максимум температурных значений в пределах температурных профилей.
9. Способ по любому из пп.6-8, отличающийся тем, что для автоматического определения определяют ожидаемое положение участка поверхности, содержащего похожее на дефект отклонение, во втором термографическом изображении на основе относительной скорости между контролируемым объектом и регистрирующим устройством направления движения и времени, прошедшем между первым моментом времени и вторым моментом времени, причем предпочтительно измеряют относительную скорость, в частности, скорость контролируемого объекта.
10. Термографическая контрольная установка для выявления с локальным разрешением и идентификации близких к поверхности дефектов в контролируемом объекте, содержащая:
нагревательное устройство (110) для нагрева участка контролируемого объекта (180) таким образом, что создается термическое неравновесие между пораженными дефектами дефектными областями и бездефектным материалом объекта, причем бездефектное окружение дефектной области не нагревается или нагревается менее сильно, чем дефектная область;
по меньшей мере, одно регистрирующее устройство (120) для регистрации последовательности, по меньшей мере, из двух термографических изображений, следующих друг за другом с временным интервалом; и
устройство оценки для оценки термографических данных термографических изображений,
причем контрольная установка выполнена с возможностью осуществления способа по любому из предыдущих пунктов.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10003756.3 | 2010-04-08 | ||
| EP10003756.3A EP2375243B1 (de) | 2010-04-08 | 2010-04-08 | Thermografisches Prüfverfahren und Prüfvorrichtung zur Durchführung des Prüfverfahrens |
| PCT/EP2011/055386 WO2011124628A1 (de) | 2010-04-08 | 2011-04-07 | Thermografisches prüfverfahren und prüfvorrichtung zur durchführung des prüfverfahrens |
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| RU2012145236A true RU2012145236A (ru) | 2014-05-20 |
| RU2549913C2 RU2549913C2 (ru) | 2015-05-10 |
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| RU2012145236/28A RU2549913C2 (ru) | 2010-04-08 | 2011-04-07 | Термографический способ контроля и контрольная установка для осуществления способа |
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| US (1) | US9194831B2 (ru) |
| EP (1) | EP2375243B1 (ru) |
| JP (2) | JP6243225B2 (ru) |
| KR (1) | KR101757019B1 (ru) |
| CN (1) | CN102947695B (ru) |
| BR (1) | BR112012025659B1 (ru) |
| CA (1) | CA2794119C (ru) |
| ES (1) | ES2953887T3 (ru) |
| MX (1) | MX2012011507A (ru) |
| RU (1) | RU2549913C2 (ru) |
| UA (1) | UA111328C2 (ru) |
| WO (1) | WO2011124628A1 (ru) |
| ZA (1) | ZA201207096B (ru) |
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| AT506109B1 (de) | 2007-11-20 | 2010-06-15 | Palfinger Systems Gmbh | Verfahren zur untersuchung der oberflächenbeschaffenheit von flächigen strukturen |
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| UA111328C2 (ru) | 2016-04-25 |
| MX2012011507A (es) | 2013-02-27 |
| JP2016128842A (ja) | 2016-07-14 |
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| ZA201207096B (en) | 2013-05-29 |
| ES2953887T3 (es) | 2023-11-16 |
| EP2375243C0 (de) | 2023-06-07 |
| CA2794119A1 (en) | 2011-10-13 |
| WO2011124628A1 (de) | 2011-10-13 |
| CN102947695B (zh) | 2015-07-22 |
| BR112012025659B1 (pt) | 2020-04-07 |
| JP2013524229A (ja) | 2013-06-17 |
| US20130077650A1 (en) | 2013-03-28 |
| JP6243225B2 (ja) | 2017-12-06 |
| KR101757019B1 (ko) | 2017-07-26 |
| EP2375243A1 (de) | 2011-10-12 |
| KR20130043105A (ko) | 2013-04-29 |
| BR112012025659A2 (pt) | 2016-06-28 |
| US9194831B2 (en) | 2015-11-24 |
| CA2794119C (en) | 2018-01-02 |
| EP2375243B1 (de) | 2023-06-07 |
| RU2549913C2 (ru) | 2015-05-10 |
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