کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6758262 | 1431265 | 2018 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental verification of long-range microwave pipe inspection using straight pipes with lengths of 19-26.5â¯m
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This study demonstrated the applicability of a nondestructive microwave testing method for the long-range inspection of pipe inner surfaces. Experimental verifications were conducted using pipes with lengths of 19-26.5â¯m, inner diameters of 11, 19, or 39â¯mm, and made of either brass or austenitic stainless steel. Microwaves were emitted from a probe attached to one of the pipe ends, and the reflections due to full circumferential wall thinning 50â¯mm in length and 1â¯mm in depth situated at various distances from the end were measured. The frequency range and the probe characteristics were decided so that microwaves propagating only in TM01 mode affect signals. After signal processing to compensate for microwave dispersion, the measured signals showed clear reflections caused by wall thinning situated 23.5â¯m from the pipe end at which microwaves were emitted. This study also discussed the attenuation of microwave reflection with the distance between a probe and wall thinning. The experimental results agreed well with a theoretical model describing the attenuation of microwave propagating inside a pipe, although the model did not consider the reflection of microwaves due to a flaw, the dependence of the reflection on the frequency of microwaves, or mode conversion of the microwave due to the reflection. The agreement revealed that not only frequency but also the inner diameter, electromagnetic property, and surface roughness of a pipe are needed to evaluate the length of the pipe that can be inspected by the method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NDT & E International - Volume 96, June 2018, Pages 47-57
Journal: NDT & E International - Volume 96, June 2018, Pages 47-57
نویسندگان
Kota Sasaki, Takuya Katagiri, Noritaka Yusa, Hidetoshi Hashizume,