The Research Of A Relatively Small Transient Magnetic Fields Measurement System

To research the defence problem of transient Electromagnetic Interference, a relatively small transient magnetic fields measurement system has been developed. Which include magnetic-field probe, wide-band amplifier, transmission cable and its compensator. This paper has analyzed the characteristics of near-field Electromagnetic Fields and the measurement principle of magnetic-field sensor, and designed probe , amplifier unit and compensator according to measurement needs. Finally, based on the Electromagnetic Pulse simulator in the lab, a set of experiments have been done on the designed magnetic fields measurement system and analyzed the error of the measurement system. All experimental results have indicated that the magnetic measurement system could be used for measuring relatively small transient magnetic fields.