Based on arctangent subdivision algorithm

a high-resolution angle measurement scheme using the tunneling magnetoresistance(TMR)effect is proposed.The structure and measurement principle of the TMR effect-based angle sensor are introduced.The magnetic field distribution around the multi-stage magnetic ring is simulated using COMSOL software

and the influences of the number of the magnetic pole pairs and measurement distance on the magnetic field strength are analyzed.In addition

the signal processing module of angular displacement based on the arctangent algorithm is introduced in detail

and the TMR angle sensor based on the multi-stage magnetic ring is tested.Test results show that the method can realize the thousand-fold subdivision of the TMR output signal

and the angular resolution can reach 0.09°

which verifies the feasibility of the proposed scheme.