Multi-degree-of-freedom magnetic navigation gradient magnetic field control system

Hunan Forever Elegance Technology Co.,Ltd. has developed the use of effective space to create large uniform space magnetic fields, high gradient eccentric magnetic fields, high strength and high uniformity permanent magnetic fields, AC and DC superimposed magnetic fields, and programmable soft The magnetic training of magnetic materials and its demagnetization magnetic field and multi-degree-of-freedom gradient magnetic field. In the field of magnetic field generating equipment, it is at the advanced level of domestic and foreign counterparts. The products have been adopted by many domestic scientific research institutes and exported to the United States, Australia, Hong Kong and other scientific research institutions, involving military industry experiments, magnetic material processing, biological experiments, medical surgery, magnetic particle imaging and other fields. The company is gradually transforming from an excellent supplier of magnetic measurement equipment to a more comprehensive supplier of magnetic material testing equipment and magnetic field design application equipment, and the prospects will be broader.

　　 Gradient magnetic field refers to a magnetic field whose magnetic field strength changes with the change of spatial displacement. A one-dimensional gradient magnetic field can be expressed by dH/dx. The direction of the magnetic field gradient generally refers to the direction where the magnetic field gradient changes the most. When dH/dx is a fixed constant, we call it a uniform gradient magnetic field. When the magnetic field is a transformation constant, we call it a non-uniform gradient magnetic field. When dH/dx=0 , Is the uniform magnetic field we often say.
　　 We can use permanent magnetic circuit, electromagnet, solenoid and Helmholtz coil to obtain the uniform magnetic field. This is quite extensive in the design, and the design is relatively mature. The research direction is how to optimize the structure of smaller magnet consumption, power consumption, and reduce cost and space consumption. Hunan Yongyi Technology Co., Ltd. has used permanent magnet SmCo to design a uniform magnetic field (0.1%) of 640kA/m for users to meet the needs of UnionPay card diamagnetic experiment; adopt innovative Helmholtz coil design to undertake domestic × ×Astronomical observatory design 1000mmX1000mmX1000mm area uniformity 1.0% magnetic field design, undertaking military experiments requires 500mmX500mmX500mm area uniformity 0.3% magnetic field design. The permanent magnet material test electromagnet currently has a power consumption of 2kVA at a pole diameter of 60mm, a gap of 10mm, and a magnetic field of 29.5kOe. The achievement is inseparable from the joint efforts of all employees and the help of friends in the industry.
The design of gradient magnetic field is a more attractive thing. In medical surgery, it is equivalent to an invisible hand controlling the interventional probe to walk along the prescribed route and reach the predetermined position. It can be widely used in cardiovascular surgery, urethral surgery and ophthalmology. Surgery, etc., it can be expected that more colleagues will invest in research and design in this direction in the near future. The company is also particularly optimistic about the development and design of medical magnetic media navigation control systems in the spherical domain using multi-degree-of-freedom gradient magnetic fields. At present, Hunan Yongyi Technology Co., Ltd. is actively communicating and cooperating with foreign scientific research institutions and hospitals, striving to design a large-scale interventional magnetic navigation control system that can be used on the human body in the near future to reduce the risk and pain of patients during surgery , For the benefit of mankind.
         Hunan Yongyi Technology Co., Ltd. has completed 6 sets of gradient magnetic field designs in response to user requirements since 2012, with a maximum gradient of 9T/m and a maximum magnetic field strength of 0.2 T, and cooperated with users to complete a number of topics. Development and research, the multi-degree-of-freedom magnetic navigation control system model is introduced as follows, and shared with colleagues.