In the design of smart robot joints, the multipole magnetized magnetic ring serves as a core driving component, generating precise magnetic field signals to achieve high-precision control and flexible rotation of the joints, significantly enhancing the robot's motion performance. Compared to traditional electromagnetic drives, it offers advantages such as efficient energy conversion, compact design, and durability, making the robot joints lighter, more powerful, and capable of stable operation in complex environments. The application of the multipole magnetized magnetic ring has also expanded the use of smart robots into a wide range of industries, including healthcare, manufacturing, and services.