Title :
Numerical prediction of operating conditions for magnetic flux leakage inspection of moving steel sheets
Author_Institution :
Dept. of Electr. Eng., Kunsan Nat. Univ., South Korea
fDate :
3/1/1997 12:00:00 AM
Abstract :
Optimal operating conditions for magnetic flux leakage inspection of moving steel sheets are predicted by using a 2-D finite element model and a time step algorithm. Through numerical modeling of motional induction phenomena, sensor signal variations due to different velocities are investigated. Results show that changes in specimen velocity affect the base signal level and the peak to peak (P-P) signal, but their variations are not proportional to the velocity. Also found is that the sensor position where the maximum P-P signal appears changes its location to the direction of specimen motion as the velocity increases. These results made it possible to decide optimal operating conditions, such as the velocity of steel sheet and the sensor location, to obtain the maximum signal to noise ratio
Keywords :
finite element analysis; inspection; magnetic field measurement; magnetic leakage; signal processing; steel; 2-D finite element model; base signal level; magnetic flux leakage inspection; maximum signal to noise ratio; motional induction phenomena; moving steel sheets; numerical prediction; operating conditions; optimal operating conditions; peak to peak signal; sensor position; sensor signal variations; time step algorithm; Finite element methods; Inspection; Magnetic flux; Magnetic flux leakage; Magnetic sensors; Numerical models; Predictive models; Sensor phenomena and characterization; Signal to noise ratio; Steel;
Journal_Title :
Magnetics, IEEE Transactions on
