Transient magnetic field waveform digital reconstruction based on sensor´s full equation

This paper deduces a kind of simple method based on the sensor´s full electromagnetic induction equation to reconstruct the transient magnetic field waveform in time domain. Research on the external electromagnetic interference source, background noise of oscilloscope and calibration method has been conducted in detail. Different kinds of methods to reduce interference and measurement error through the software and hardware method have been tested successfully. Calibration was conducted with impulse current generator from mus to ms scale. The results show that the reconstructed waveform is very consistent with the source waveform either in low frequency or in high frequency with less than 5% magnitude error