An Automated Scanning System for the Acquisition of Nonuniform Time-Varying Magnetic Fields

This paper presents an automatic scanning solution for measuring nonuniform magnetic fields captured by a tri-axial sensor connected to a time-domain acquisition system over a robotic arm. The sensor has been realized and calibrated through a canonical configuration consisting of Helmholtz coils. The acquisition system is instead executed by a Red Pitaya, which is an FPGA-based board with high performance and reliability regarding the sampling rate of the input signal. A LabVIEW software has then been developed for the acquisition of the sampled signal over time, the calculation and post-processing of the magnetic field, and the data saving. Finally, an Arduino-based robotic arm has been employed to make the acquisition system fully automated. This is particularly useful for the compliance assessment against electromagnetic field exposures at workplaces.