Study of signal processing for EMAT

被引：2
|
作者：
Nishimura, Yoshihiro [1 ]
Sasamoto, Akira [1 ]
Suzuki, Takayuki [1 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058564, Japan
来源：
APPLIED ELECTROMAGNETIC ENGINEERING FOR MAGNETIC, SUPERCONDUCTING AND NANOMATERIALS | 2011年 / 670卷
关键词：
EMAT; Magnetic Pproperty; Ultra sound; UT; Image Reconstruction; FFT;
D O I：
10.4028/www.scientific.net/MSF.670.345
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：
EMAT using a magnetostrictive effect was employed to detect flaws in the sample with scaled surface. Chromium molybdenum steel samples were annealed from 600 degrees C to 900 degrees C for two hours to eight hours and subjected to EMAT to survey its signal properties. The signal output was found to have too much noise to identify internal flaws and to reconstruct flaw images in a computer. This study proposes spectrum analysis methods and statistical methods based on the noise probability to decrease this noise.
引用
收藏
页码：345 / 354
页数：10
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