전기철도 차량에 대한 극저주파 자계영역의 시간영역 측정 및 스펙트럼 분석

Time-domain measurement and spectral analysis of low frequency magnetic field on board of rolling stock

The measurement of magnetic field is performed AC magnetic field emission density in driver cab and saloon's compartment of rolling stock. In order to measure magnetic-field emission, a three-axial magnetic-field sensor is used and connected to data process system. The AC magnetic field is checked and analysis through BNC output, DAQ cad and notebook PC. The spectral analysis is performed by short time Fourier transform(STFT) for time-domain emission signal.