Evaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter

Surface texture is an important parameter which affects functions and performance of industrial components. Although stylus and optical techniques are commonly used for evaluating the surface topology, they are applicable only to accessible surfaces. In practice, the geometrical features measurement...

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Autores principales:	Chanh Nghia NGUYEN, Yu KUROKAWA, Hirotsugu INOUE
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2018
Materias:	ultrasonic nde surface profile pulse-echo technique inaccessible surfaces Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/6f36f08c0465458cac48d5a614d7c43e
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id	oai:doaj.org-article:6f36f08c0465458cac48d5a614d7c43e
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spelling	oai:doaj.org-article:6f36f08c0465458cac48d5a614d7c43e2021-11-26T07:16:02ZEvaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter2187-974510.1299/mej.17-00585https://doaj.org/article/6f36f08c0465458cac48d5a614d7c43e2018-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/5/2/5_17-00585/_pdf/-char/enhttps://doaj.org/toc/2187-9745Surface texture is an important parameter which affects functions and performance of industrial components. Although stylus and optical techniques are commonly used for evaluating the surface topology, they are applicable only to accessible surfaces. In practice, the geometrical features measurement of inaccessible surfaces from back side is sometimes demanded, for example, in inspection of safety-critical parts such as inner surfaces of pipes. For evaluating such internal surfaces, ultrasonic technique is one of the most effective among others. However, little attention has been paid to the evaluation of inaccessible periodic surfaces so far. In this paper, an ultrasonic pulse-echo technique, namely, master curve technique is developed for evaluating the pitch and the height of periodic triangular surfaces which is inaccessible or hidden on the back side. It is found that 60° of incident angle is appropriate for the development of the master curve equation to compromise between the resolution of measurement and the measurable range of the height-to-pitch ratio. By using P-wave at 60° of incidence angle, the pitch of the surface profile is evaluated from the classical diffraction grating equation, and then the height is evaluated by the master curve equation built from numerical simulation. The validity of the proposed method was verified by both numerical simulation and experiment. It was confirmed that the pitch is accurately measured in most cases. The height was also evaluated with good accuracy when it is smaller than a half of the pitch.Chanh Nghia NGUYENYu KUROKAWAHirotsugu INOUEThe Japan Society of Mechanical Engineersarticleultrasonic ndesurface profilepulse-echo techniqueinaccessible surfacesMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 5, Iss 2, Pp 17-00585-17-00585 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	ultrasonic nde surface profile pulse-echo technique inaccessible surfaces Mechanical engineering and machinery TJ1-1570
spellingShingle	ultrasonic nde surface profile pulse-echo technique inaccessible surfaces Mechanical engineering and machinery TJ1-1570 Chanh Nghia NGUYEN Yu KUROKAWA Hirotsugu INOUE Evaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter
description	Surface texture is an important parameter which affects functions and performance of industrial components. Although stylus and optical techniques are commonly used for evaluating the surface topology, they are applicable only to accessible surfaces. In practice, the geometrical features measurement of inaccessible surfaces from back side is sometimes demanded, for example, in inspection of safety-critical parts such as inner surfaces of pipes. For evaluating such internal surfaces, ultrasonic technique is one of the most effective among others. However, little attention has been paid to the evaluation of inaccessible periodic surfaces so far. In this paper, an ultrasonic pulse-echo technique, namely, master curve technique is developed for evaluating the pitch and the height of periodic triangular surfaces which is inaccessible or hidden on the back side. It is found that 60° of incident angle is appropriate for the development of the master curve equation to compromise between the resolution of measurement and the measurable range of the height-to-pitch ratio. By using P-wave at 60° of incidence angle, the pitch of the surface profile is evaluated from the classical diffraction grating equation, and then the height is evaluated by the master curve equation built from numerical simulation. The validity of the proposed method was verified by both numerical simulation and experiment. It was confirmed that the pitch is accurately measured in most cases. The height was also evaluated with good accuracy when it is smaller than a half of the pitch.
format	article
author	Chanh Nghia NGUYEN Yu KUROKAWA Hirotsugu INOUE
author_facet	Chanh Nghia NGUYEN Yu KUROKAWA Hirotsugu INOUE
author_sort	Chanh Nghia NGUYEN
title	Evaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter
title_short	Evaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter
title_full	Evaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter
title_fullStr	Evaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter
title_full_unstemmed	Evaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter
title_sort	evaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter
publisher	The Japan Society of Mechanical Engineers
publishDate	2018
url	https://doaj.org/article/6f36f08c0465458cac48d5a614d7c43e
work_keys_str_mv	AT chanhnghianguyen evaluationoftheheightofinternalperiodictriangularsurfacesbyultrasonicbackscatter AT yukurokawa evaluationoftheheightofinternalperiodictriangularsurfacesbyultrasonicbackscatter AT hirotsuguinoue evaluationoftheheightofinternalperiodictriangularsurfacesbyultrasonicbackscatter
_version_	1718409723907145728

Evaluation of the height of internal periodic triangular surfaces by ultrasonic backscatter

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