Design a magnetic compass sensor based on magnetic induction effect

the single axial core sensor is formed by nano Pomo alloy material molding

and it is produced on magnetic core

which is wound with the wire winding. The magnetic induction sensor is processed by LR resonant Schmidt trigger circuit

and magnetic field intensity signal is converted to frequency signal. Adopt high precision frequency meter based on FPGA to extract magnetic compass frequency signal. Magnetic compass sensor uses four points correction method to compensate background magnetic interference signal

at the same time

DSP is used to capture signal of 3D acceleration sensor in order to carry out intelligent attitude self-compensation

which makes the sensor have good environment adaptability. The results show that the sensor has advantages of high precision

high stability

low power consumption

small size and has intelligent self-compensation function.