The study of Proton magnetometer sensor fast tuning algorithm based on FFT

The sensor´s tuning of Proton magnetometer is the key to get the best signal to noise ratio. The paper analyzes general sensor tuning method, gives a fast sensor tuning method based on fast Fourier transform, confirms the feasibility of the method, and implements the algorithm in STM32 microcontroller. The result shows that the speed of the algorithm is about five times faster than general sensor tuning method for initial tuning, and the algorithm solves the problem of out of tuning in the process of magnetic measurement.