RU2003123720A - METHOD OF ULTRASONIC DEFECTOSCOPY OF SHEET AND VARIETY PIPES RENT - Google Patents

METHOD OF ULTRASONIC DEFECTOSCOPY OF SHEET AND VARIETY PIPES RENT Download PDF

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RU2003123720A
RU2003123720A RU2003123720/28A RU2003123720A RU2003123720A RU 2003123720 A RU2003123720 A RU 2003123720A RU 2003123720/28 A RU2003123720/28 A RU 2003123720/28A RU 2003123720 A RU2003123720 A RU 2003123720A RU 2003123720 A RU2003123720 A RU 2003123720A
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status
signals
reliable
interference
time
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RU2003123720/28A
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RU2265833C2 (en
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Андрей Васильевич Кириков (RU)
Андрей Васильевич Кириков
Константин Николаевич Макаренков (RU)
Константин Николаевич Макаренков
Андрей Юрьевич Смирнов (RU)
Андрей Юрьевич Смирнов
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ООО "Компани Нординкрафт" (RU)
ООО "Компания Нординкрафт"
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1. Способ ультразвуковой дефектоскопии листового и сортового проката и труб, включающий возбуждение акустических волн, прием и обработку отраженных сигналов, отличающийся тем, что обнаружение импульсов помех осуществляют только в информативных интервалах времени с помощью регистрирующих ультразвуковых преобразователей, сигналы от регистрирующих преобразователей сравнивают с заданным пороговым значением К, о наличии импульсной помехи судят по превышению этих сигналов заданного порогового значения, акустическим сигналам, принятым в моменты регистрации помехи, присваивают статус “недостоверные”, остальным данным присваивают статус “достоверные” и сохраняют, сигналы со статусом “недостоверные” исключают из дальнейшего анализа и заменяют на данные со статусом “достоверные”, полученные на аналогичных интервалах времени, подсчитывают количество данных в единицу времени со статусом “недостоверные” и “достоверные” за интервал времени Т, а предельно допустимую скорость ультразвукового контроля определяют по выражению1. The method of ultrasonic inspection of sheet and long products and pipes, including the excitation of acoustic waves, reception and processing of reflected signals, characterized in that the detection of interference pulses is carried out only at informative time intervals using recording ultrasonic transducers, the signals from the recording transducers are compared with a predetermined threshold value of K, the presence of impulse noise is judged by the excess of these signals at a predetermined threshold value, the acoustic signals received in the moments of registration of interference, assign the status of “unreliable”, the rest of the data are assigned the status of “reliable” and save, signals with the status of “invalid” are excluded from further analysis and replaced with data with the status of “reliable”, obtained at similar time intervals, count the amount of data in unit of time with the status of “unreliable” and “reliable” for the time interval T, and the maximum permissible speed of ultrasonic testing is determined by the expression Vk=(1-Z)·Vo, где Z=Nнд/Nнд+Nд,V k = (1-Z) · V o , where Z = N nd / N nd + N d , где Z - показатель недостоверности контроля, 0<Z<1;where Z is an indicator of the uncertainty of control, 0 <Z <1; Vo - предельно допустимая скорость контроля при полном отсутствии помехи;V o - the maximum permissible speed of control in the complete absence of interference; Nнд - количество сигналов в единицу времени, имеющих статус “недостоверные”;N ND - the number of signals per unit of time having the status of “unreliable”; Nд - количество сигналов в единицу времени, имеющих статус “достоверные”.N d - the number of signals per unit of time having the status of “reliable”. 2. Способ по п.1, отличающийся тем, что в качестве регистрирующего преобразователя используют любой преобразователь комплекта ультразвукового прибора.2. The method according to claim 1, characterized in that as the recording transducer use any transducer kit ultrasound device. 3. Способ по пп.1 и 2, отличающийся тем, что статус “недостоверные” присваивается путем вычисления зависимости3. The method according to claims 1 and 2, characterized in that the status of "false" is assigned by calculating the dependence
Figure 00000001
Figure 00000001
 где S1(t) - сигнал с рабочего преобразователя;where S 1 (t) is the signal from the working Converter; S2(t) - сигнал с регистрирующего преобразователя;S 2 (t) is the signal from the recording transducer; t1-t2 - информативный интервал,t 1 -t 2 is an informative interval, только тем сигналам, которые зарегистрированы в моменты действия помехи с амплитудой, превышающей установленный порог К.only to those signals that are registered at the moments of interference with an amplitude exceeding the set threshold K.
RU2003123720/28A 2003-07-31 2003-07-31 Method of ultrasonic defectoscopy of sheet and bar RU2265833C2 (en)

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RU2003123720A true RU2003123720A (en) 2005-01-27
RU2265833C2 RU2265833C2 (en) 2005-12-10

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Publication number Priority date Publication date Assignee Title
JP4491800B2 (en) * 2008-03-27 2010-06-30 住友金属工業株式会社 Ultrasonic flaw detection method and apparatus
RU2517774C1 (en) * 2013-01-10 2014-05-27 Открытое акционерное общество "Иркутский научно-исследовательский и конструкторский институт химического и нефтяного машиностроения" (ОАО "ИркутскНИИхиммаш") Method of non-destructive pipe check

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