Публікація: Високоефективний контроль труб електромагнітно-акустичними перетворювачами
Дата
2017
Автори
Назва видання
ISSN
Назва тому
Видання
НТУ "ХПІ"
Анотація
Розроблено новий метод контролю ультразвуковими імпульсами всього об’єму металу труб. Для реалізації цього методу розроблений електромагнітно-акустичний перетворювач нового типу, який дає можливість виявляти дефекти новим і традиційним методом та вимірювати товщину стінки об'єктів контролю. Розроблений електромагніто-акустичний перетворювач працює в широкому діапазоні частот та амплітуд сигналу, що дозволяє ефективно виявляти дефекти на різних глибинах, з різними геометричними параметрами. Експериментальні дослідження трубних зразків підтвердили високу ефективність розробленого методу та нових ультразвукових безконтактних перетворювачів.
A new method for controlling pipes with ultrasonic pulses of the total volume of metal is developed. For the implementation of this method, an electromagnetic acoustic converter of a new type has been developed, which makes it possible to detect defects by a new and traditional method and measure the thickness of the wall of control objects. The developed electromagnetic acoustic converter works in a wide range of frequencies and amplitudes of the signal, which allows to effectively detect defects at different depths, with different geometric parameters. The frequency range for developed electromagnetic acoustic transducer varies in the range from 0,5 to 6 MHz, and allows for measurement of wide array of tubular samples, allowing detection of both internal and surface defects. Accordingly wide array of defects can be detected, varying from cracks to air bubbles and caverns. Experimental studies of tube samples confirmed the high efficiency of the developed method and new ultrasonic noncontact transducers. Two transducers are used within given solution to generatend receive the signal, for further processing within hybrid analog/digital system. The magnetic field generated by first transducer emits the acoustic waves for the second transducer to register. Wave set registered includes straight, transverse and Rayleigh waves, which are echoed from defect and other elements of the sample, creating the image which allows to analyze the defect in complex form, including it’s location and geometry.
A new method for controlling pipes with ultrasonic pulses of the total volume of metal is developed. For the implementation of this method, an electromagnetic acoustic converter of a new type has been developed, which makes it possible to detect defects by a new and traditional method and measure the thickness of the wall of control objects. The developed electromagnetic acoustic converter works in a wide range of frequencies and amplitudes of the signal, which allows to effectively detect defects at different depths, with different geometric parameters. The frequency range for developed electromagnetic acoustic transducer varies in the range from 0,5 to 6 MHz, and allows for measurement of wide array of tubular samples, allowing detection of both internal and surface defects. Accordingly wide array of defects can be detected, varying from cracks to air bubbles and caverns. Experimental studies of tube samples confirmed the high efficiency of the developed method and new ultrasonic noncontact transducers. Two transducers are used within given solution to generatend receive the signal, for further processing within hybrid analog/digital system. The magnetic field generated by first transducer emits the acoustic waves for the second transducer to register. Wave set registered includes straight, transverse and Rayleigh waves, which are echoed from defect and other elements of the sample, creating the image which allows to analyze the defect in complex form, including it’s location and geometry.
Опис
Ключові слова
труба, ультразвуковий контроль, ультразвуковий перетворювач, електромагнітно-акустичний імпульс, дефект, pipe, ultrasonic control, ultrasonic transducer, electromagnetic acoustic, pulse, defect
Бібліографічний опис
Плєснецов С. Ю. Високоефективний контроль труб електромагнітно-акустичними перетворювачами / С. Ю. Плєснецов // Вісник Нац. техн. ун-ту "ХПІ" : зб. наук. пр. Сер. : Інноваційні технології та обладнання обробки матеріалів у машинобудуванні та металургії = Bulletin of National Technical University "KhPI" : coll. sci. papers. Ser. : Innovative technologies and equipment handling materials in mechanical engineering and metallurgy. – Харків : НТУ "ХПІ", 2017. – № 35 (1257). – С. 44-48.