Magnetic Drives for Nanorobots - Rotating and Gradient Magnetic Field of 3D Helmholtz Coils

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Application of nanorobots in the medical industry


Since Nobel Prize-winning theoretical physicist Richard Feynman first proposed the idea of nanotechnology in 1959, scientists have been studying it until now, and its applications have become more and more extensive, especially in the medical industry. Nanorobots, shaped like E. coli. Scientists already conducted clinical trials in 2015. Scientists in the field of nanotechnology research are actively exploring other applications of this technology, such as water treatment or environmental governance. In the future, millions of nanorobots may be manipulated and sent through polluted waters to find and process pollutants and collect them together.



nanorobots in the medical industry


When treating heart disease, nanorobots will pass through a catheter with a diameter of 2 to 3 millimeters and enter the specific part that needs treatment. This catheter technique can also be used in the brain as well as other sites such as the bowel and urinary tract. The greatest difficulty in accessing these parts is the extreme precision that must be achieved. For this reason, nanotechnology has long been hailed as the ideal weapon in the future fight against cancer.


Drives for nanorobots


In daily research in the laboratory, scientists use the rotating magnetic field and gradient magnetic field generated by the three-dimensional Helmholtz coil to drive the nanorobots to move in the blood vessels and reach the designated position precisely.


Helmholtz coils system

Helmholtz coils system Helmholtz coils system


The three-dimensional AC-DC Helmholtz coil magnetic drive system designed by Dexinmag company can be controlled in a closed-circuit manner in the frequency range of 0-20Hz and the magnetic field range of 0-200Gs, and can produce AC and DC uniform strong magnetic field, gradient magnetic field, and rotating magnetic field. Simple. Dexinmag company currently provides satisfactory solutions to well-known institutions such as the Institute of Physics of the Chinese Academy of Sciences, Huazhong University of Science and Technology, Sun Yat-sen University, South China University of Technology, and Hebei University.


Introduction to three-dimensional Helmholtz coils, rotating magnetic field, and gradient magnetic field


A three-dimensional Helmholtz coil is a magnetic field generator composed of three coaxial toroidal coils. This coil design produces a uniform and controllable magnetic field, characterized by a magnetic field whose strength remains constant in space. By adjusting the current and geometry of the coil, we can achieve precise control over the strength and direction of the magnetic field. Three-dimensional Helmholtz coils are widely used in magnetic field experiments, magnetic resonance imaging and other fields.


Rotating magnetic field refers to the phenomenon that the direction of the magnetic field changes periodically in space. By introducing AC power into a three-dimensional Helmholtz coil, we can achieve the generation of a rotating magnetic field. Rotating magnetic field have many applications. For example, in the study of magnetic properties of materials, rotating magnetic field can be used to change the magnetic behavior of materials, thereby achieving control of material properties.


Gradient magnetic field refers to the phenomenon that the magnetic field intensity changes linearly in space. In a three-dimensional Helmholtz coil, we can generate gradient magnetic field by applying currents of different sizes to different coils.

Gradient magnetic field are widely used in medical imaging. For example, in magnetic resonance imaging, through the action of gradient magnetic field, signals at different locations can be distinguished, thereby obtaining high-quality images.




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The X and Y axis coils are charged to form a 90-degree orientation angle, and the magnetic field can rotate; There is a conductor inside, and the conductor will rotate when it conducts magnetism.


The conductor piece rotates in a three-dimensional Helmholtz coil


Rotating magnets, the magnetic field can be rotated 360° around the axis of rotation and can be equipped with a stepper motor to accurately control the rotation of the magnet, arbitrarily set the rotation angle, and programmable control forward rotation and travel time. The controller's angular resolution is 0.01 degrees, the mechanical step angle is 0.1 degrees, and the repeatability is 0.05 degrees.


DXXZ-60 Permanent Magnet Rotating Magnetic Field