Magnetic materials are a kind of substances that can generate and be affected by magnetic fields. These materials are usually composed of iron, nickel, cobalt and other metals and their alloys, in which there is a magnetic moment inside the atoms or molecules. According to the magnetic ability of the material, magnetic material can be further divided into ferromagnetic, ferromagnetic and paramagnetic materials. Ferromagnetic materials will produce strong magnetization under the action of the external magnetic field, and will still maintain a certain degree of magnetism after removing the external magnetic field. It is widely used in the manufacture of electromagnets, transformers, motors, etc. Ferromagnetic materials will be attracted under the action of external magnetic field, but the magnetism will quickly disappear after removing the external magnetic field. It is used to manufacture induction coils, magnetic storage media, etc. Paramagnetic materials will show weak magnetism under external magnetic field, but will not maintain permanent magnetism. It is commonly used in magnetic resonance imaging, magnetic fluid and other fields. Magnetic materials have important applications in electronic technology, communication, medical treatment, energy and other fields, and play a key role in modern science and industrial development. 

 The magnetic vision detection equipmentconverts the captured target into an image signal through the machine vision product CCD image sensor and transmits it to a special image processing system. According to the pixel distribution, brightness, color and other information, it is converted into a digital signal. The image system performs various operations on these signals to extract the characteristics of the target. , and then control the on-site equipment action according to the results of the judgment to make an accurate judgment of the product. 

 Detection effect 

 Top positive light detection 

Bottom positive light detection

Positive light detection

Reverse side positive light detection