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環形配列 磁氣센서를 利用한 高壓給水加熱器 傳熱管의 非破壞檢査

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Author(s)
정명철
Issued Date
2017
Abstract
A non-destructive testing system is developed for the inspection of austenitic stainless steel heat exchanger tubes. First, integrated Hall sensor arrays are disposed under absolute type coil. When an alternating current is applied to the bobbin coils, an induced current in circumferential direction is generated in the heat exchanger tube. In this structure, an eddy current is generated around the defect, and the impedance of bobbin coil changes. Therefore, it is possible to estimate the presence and location of a defect by analyzing the bobbin coil signal, i.e., the amplitude and phase shift. Furthermore, the eddt currents generated around the defects distort the time-varying magnetic field distribution, so the shape of defect can be evaluated by the measurement of these distortions using the bobbin-type integrated Hall sensor array and the AC amplification signal processing circuit. The developed system is verified using the artificial defects introduced into the SS304 heat exchanger tubes of the high-pressure water feeder.
Alternative Title
Non-Destructive Testing of Heat Exchanger Tubes in the High Pressure Water Feeder Using the Bobbin-type Integrated Magnetic Sensor Arrays
Alternative Author(s)
Myungchul Jung
Department
일반대학원 제어계측공학과
Advisor
李鎭伊
Awarded Date
2018-02
Table Of Contents
제1장 서 론 1
제2장 원리 6
제1절 결함검출의 원리 6
제2절 데이터 표현 9
제3절 결함검출 알고리즘 18
제3장 실험 및 고찰 20
제1절 시험편 20
제2절 센서 및 자원 24
제3절 실험결과 28
제4절 시험편별 결함 탐상 결과 45
제5절 결함 평가 56
제4장 결론 74
REFERENCE 76
Degree
Master
Publisher
조선대학교 대학원
Citation
정명철. (2017). 環形配列 磁氣센서를 利用한 高壓給水加熱器 傳熱管의 非破壞檢査.
Type
Dissertation
URI
https://oak.chosun.ac.kr/handle/2020.oak/13566
http://chosun.dcollection.net/common/orgView/200000266826
Appears in Collections:
General Graduate School > 3. Theses(Master)
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