Hunan Yongyi Technology Co., Ltd.With a solid magnetic field design foundation, we have successively developed a large uniform space magnetic field, a high gradient hook magnetic field, a high-strength high-uniformity permanent magnetic field, an AC/DC superimposed magnetic field, a program-controlled magnetic material magnetic exercise and its demagnetization magnetic field and a multi-degree-of-freedom gradient magnetic field. Experienced in magnetic field generating equipment. The products are adopted by many domestic scientific research institutes and exported to the United States, Australia, Hong Kong and other scientific research institutions, involving military experiments, magnetic material processing, biological experiments, medical surgery and magnetic powder imaging. The company is gradually transforming from a 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 fieldRefers to the magnetic field strength with the change of spatial displacement magnetic field strength changes, one-dimensional gradient magnetic field can be expressed by dH/dx. The direction of the magnetic field gradient generally refers to the direction in which the magnetic field gradient changes the most. When dH/dx is a fixed constant, we call it uniform gradient magnetic field. When the magnetic field is a transformation constant, we call it uneven gradient magnetic field. When dH/dx = 0, it is what we often call uniform magnetic field.
The uniform magnetic field can be obtained by using permanent magnet magnetic circuit, electromagnet, solenoid and Helmholtz coil, which 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.A uniform magnetic field of 640kA/m (0.1) has been designed for users with permanent magnet strong magnetic SmCo, which is used for the needs of UnionPay card diamagnetic experiments. The innovative Helmholtz coil design is used to undertake the magnetic field design of 1000mmX1000mmX1000mm area uniformity 1.0% designed by xx observatory in China, and the magnetic field design of 500mmX500mmX500mm area uniformity 0.3% required for military experiments. At present, the permanent magnet material test electromagnet also consumes 2kVA power at a pole surface 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 terms of 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 ophthalmic surgery. It can be expected that more colleagues will invest in the research and design of this direction in the near future. Hunan Yongyi Technology Co., Ltd. is also particularly optimistic about the use of multi-degree-of-freedom gradient magnetic field in the spherical domain for the development and design of medical magnetic medium navigation control system. At present, Hunan Yongyi Technology Co., Ltd. is actively cooperating with foreign scientific research institutions and hospitals to design a large-scale interventional magnetic navigation control system that can be used in the human body in the near future, so as to reduce the risk and pain of patients in surgery and benefit mankind.
Hunan Yongyi Technology Co., Ltd.Through the design of gradient magnetic fields at the request of users since 2012, six sets of gradient magnetic fields have been designed successively, with the maximum gradient reaching 9 T/m and the maximum magnetic field strength reaching 0.2 T. The development and research of many topics have been completed in cooperation with users. The model of multi-degree-of-freedom magnetic navigation control system is introduced as follows and shared with peers.
1. University of Edis Coven, Australia: 8 heads, sphere diameter 250mm, gradient 2 T/m, maximum magnetic field: 0.15T.
2. City University of Hong Kong: 6 heads, 200mm in diameter, 2 T/m in gradient and 0.065T in maximum magnetic field.
