Pipe-Wall Thickness Measurement at High Temperature by Electromagnetic Acoustic Transducer

被引：3

作者：

Nakamoto, Hiroyuki ^{[1
]}

Kojima, Fumio ^{[1
]}

Morikawa, Atsushi ^{[1
]}

Tabata, Hiroki ^{[1
]}

Kosaka, Daigo ^{[2
]}

机构：

[1] Kobe Univ, Grad Sch Syst Informat, Nada Ku, 1-1 Rokkodai Cho, Kobe, Hyogo 6578501, Japan

[2] Polytech Univ, Kodaira, Tokyo 1870035, Japan

来源：

ELECTROMAGNETIC NONDESTRUCTIVE EVALUATION (XVII) | 2014年 / 39卷

关键词：

Pipe-wall thickness measurement; electromagnetic acoustic transducer; high temperature; ultrasonic velocity; RESONANCE;

D O I：

10.3233/978-1-61499-407-7-256

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper is concerned with a high temperature tolerance electromagnetic acoustic transducer (EMAT). In order to use in high temperature environments, the EMAT is composed from samarium- cobalt magnets and a heatproof coil. Measurements of pipe-wall thicknesses require the ultrasonic velocities in the high temperature environment. The ultrasonic velocities are measured, and are used in the electromagnetic resonance (EMAR) method. The thicknesses measured by using 17 pipe specimens with a simulated corrosion are nearly equal to the reference values corrected with thermal expansions. The feasibility and effectiveness of the high temperature tolerance EMAT are confirmed.

引用

页码：256 / 262

页数：7

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