| Title |
Effects of the PIG Draft Velocity on the Defect Signals in MFL NDT System |
| Keywords |
자기 누설 탐상 시스템 ; 비파괴 검사 ; 비선형 유한요소법 MFL system ; NDT |
| Abstract |
In this paper, dynamic characteristics of the magnetic flux leakage(MFL) type non-destructive testing(NDT) are analyzed. Effects of a sensor speed in MFL PIG system and remanent magnetization of the gas pipeline are analyzed by using 3 dimensional nonlinear finite element analysis including eddy current and hysteresis characteristics. Results show that the speed of the sensor reduces the magnitude of the sensing signals where as the hysteresis of the pipeline distorts the sensing signals. |