Grid array type magnet group

Abstract

The utility model relates to the technical field of magnets, and particularly discloses a grid array type magnet group, which comprises a plurality of first magnets and a plurality of second magnets, the plurality of first magnets and the plurality of second magnets are alternately arranged into a plurality of magnet rows and / or a plurality of magnet columns along the horizontal direction and / or the vertical direction, and the plurality of first magnets and the plurality of second magnets are alternately arranged into the plurality of magnet rows and / or the plurality of magnet columns along the horizontal direction and / or the vertical direction. The plurality of magnet rows and / or the plurality of magnet columns form a rectangular array type structure; in any magnet row or any magnet column, the two ends, close to each other, of the first magnetic block and the second magnetic block are different in magnetism; the first magnetic blocks and the second magnetic blocks are alternately arranged and are different in magnetism, stable magnetic field small units are formed, stable and uniform magnetic fields are cooperatively generated, the resistance to external magnetic field interference is enhanced, the multiple rows and / or columns of magnet rows and / or magnet columns form a rectangular array structure, magnetic force can be evenly distributed on an array plane, local magnetic force nonuniformity is avoided, and the magnetic field interference resistance is improved. And integration with other parts or systems is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnet technical field especially discloses a palace grid array formula magnet group. BACKGROUND

[0002] With the continuous development of science and technology, the requirement of magnetic assembly is increasing in many fields. On the one hand, high-precision magnetic sensor calibration, magnetic imaging detection and other requirements for magnetic field stability and uniformity are strict, and the traditional magnet structure is easy to appear local magnetic force uneven problem, and it is difficult to resist external magnetic field interference, which affects the equipment precision and performance. On the other hand, electronic products are developing rapidly, and the internal space of small-sized equipment is tight, but the existing magnetic structure is not compact enough, and the performance is poor in magnetic force coupling and electric energy transmission efficiency, which cannot meet the space utilization demand. In addition, the working environment of magnetic assembly is complex, often in contact with corrosive medium, easy to be affected by humidity, salt spray and other harsh conditions, and common materials and structure are easy to be oxidized and corroded, and the performance and service life are damaged. At the same time, in specific application, the existing magnetic assembly is difficult to meet the requirement of specific direction magnetic field intensity, and the cooperation with other parts is poor, which hinders the realization of the overall function of the equipment. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a palace grid array formula magnet group.

[0004] In order to achieve the above-mentioned purpose, the palace grid array formula magnet group of the utility model, including first magnetic block, second magnetic block, the number of first magnetic block, second magnetic block is multiple, multiple first magnetic block, multiple second magnetic block is alternately arranged into multiple magnet rows and / or multiple magnet columns along the horizontal and / or vertical direction, and multiple magnet rows and / or multiple magnet columns constitute a square array structure; in any magnet row or any magnet column, the two ends of the first magnetic block and the second magnetic block close to each other are different in magnetism.

[0005] The first magnetic blocks and the second magnetic blocks are alternately arranged in multiple rows and multiple columns in a rectangular array structure in the horizontal and / or vertical direction, and a relatively uniform magnetic field can be formed in the area covered by the array. The combination of multiple magnetic blocks can superimpose the magnetic field in the local area, which can significantly enhance the overall magnetic field strength compared to a single magnetic block. In devices that require a larger magnetic field force, such as electromagnetic separators, the use of this mosaic array type magnet group can improve the adsorption and separation efficiency of minerals and enhance the working efficiency of the device. The two ends of the first magnetic block and the second magnetic block are magnetically different from each other when they are close to each other, which makes there be an attractive force between adjacent magnetic blocks. In the entire array structure, these attractive forces interact to form an inherent balanced force distribution system, which helps to improve the stability and reliability of the entire system and reduce structural deformation or damage caused by external interference. By changing the size, shape, material of the first magnetic block and the second magnetic block, as well as the spacing between them, the adsorption force of the magnet group as a whole can be flexibly adjusted. The rectangular array structure facilitates modular design and combination.

[0006] Further, any first magnetic block of any magnetic row and / or any magnetic column of the rectangular array structure is adjacent to a second magnetic block, and any first magnetic block and any second magnetic block in the rectangular array structure are enclosed by the adjacent second magnetic block and first magnetic block to form a mosaic cell, and the rectangular array structure is composed of the mosaic array structure via the mosaic cell.

[0007] Each mosaic cell is enclosed by adjacent magnetic blocks with different magnetism, which can promote a certain degree of focusing effect of the magnetic field inside the mosaic cell. Due to the existence of the mosaic cell, a magnetic field gradient is formed between adjacent mosaic cells. By reasonably designing the size of the mosaic cell, the difference in magnetic strength of the magnetic blocks, etc., the magnetic field gradient can be finely adjusted. In a magnetic fluid sealing device, accurate magnetic field gradient can better control the distribution and flow state of the magnetic fluid, thereby achieving more efficient and stable sealing effect, reducing the risk of leakage, and improving the service life and reliability of the sealing device. The mutual connection and enclosure of the mosaic cells make the entire mosaic array structure form an organic whole. The magnetic blocks of each mosaic cell support and restrain each other, which can better resist external mechanical stress and deformation compared to a simple row-column arrangement structure. The form of the mosaic cell provides convenience for integrating other functional components within or between each cell. For example, a small electromagnetic induction coil can be embedded in the mosaic cell to collect electrical energy or convert signals using the magnetic field changes generated by the mosaic array type magnet group. The layout of the mosaic cell helps to optimize the uniformity distribution of the magnetic field in a larger space range, such as a magnetic field annealing furnace for semiconductor material preparation. The mosaic array structure can reduce local non-uniformity in the magnetic field, ensure that the material is subjected to a uniform and consistent magnetic field in the entire processing space, and improve the performance consistency of the material and the stability of the product quality.

[0008] The grid array structure enhances the magnetic coupling effect between the magnetic blocks. The close opposite attractive relationship between the adjacent first magnetic block and the second magnetic block forms an efficient magnetic force network throughout the array. This structure can improve the efficiency of electric energy transmission and reduce energy loss. The grid array design allows more magnetic blocks to be accommodated in a limited space. This compact structure is very beneficial for miniaturized magnetic devices. The regular grid array structure is less likely to have local magnetic field distortion when subjected to external non-uniform magnetic field interference due to the stability of the interaction between each grid unit (i.e. the unit composed of adjacent first magnetic block and second magnetic block) in the structure.

[0009] Further, the first magnetic block and the second magnetic block have the same structure, and the number of magnetic blocks is set to nine or twelve, and the grid array structure is formed as a nine-grid array structure or a twelve-grid array structure.

[0010] When the number of magnetic blocks is set to nine to form a nine-grid array structure or twelve to form a twelve-grid array structure, the magnetic field distribution inside the whole array is more uniform due to the same structure and regular arrangement of each magnetic block, reducing the local magnetic field strength unevenness caused by the difference in magnetic block layout. A specific number of magnetic blocks (nine or twelve) facilitates precise regulation of the magnetic field strength of the whole grid array structure by changing the magnetic strength and other parameters of individual magnetic blocks. Because of its regular and relatively fixed layout, it is more predictable and operable when calculating and adjusting the magnetic field strength. The nine-grid array structure and the twelve-grid array structure are very regular in form and have high symmetry. This regularity makes the whole magnet group occupy a more compact and reasonable space inside the device, which can better integrate with other components. Whether it is a nine-grid or a twelve-grid array structure, it can be widely used in many fields due to its optimized magnetic field characteristics, compact and regular structure, and easy-to-coordinate design advantages.

[0011] Further, the magnetic block has a first magnetic surface with N-pole magnetic property and a second magnetic surface with S-pole magnetic property, and the first magnetic surface and the second magnetic surface of any magnetic block are located on both sides of the grid plane formed by the magnet row and the magnet column, and the center axis direction of any magnetic block is parallel to the center axis direction of another magnetic block.

[0012] Since the central axis direction of any magnetic block is parallel to the central axis direction of another magnetic block, this makes the magnetic field generated by the entire grid array magnet group have a clear and unified direction in a macroscopic sense. In a magnetic field energy collection device, a unified magnetic field direction helps to optimize the layout of energy collection components such as coils, enabling them to cut magnetic field lines more efficiently, thereby improving the efficiency of converting magnetic field energy into electrical energy. The magnetic block has a first magnetic surface with N-pole magnetism and a second magnetic surface with S-pole magnetism, and is located on both sides of the grid plane. Such a layout enables the magnetic field to form a more symmetrical and effective distribution on both sides of the grid plane. The distribution of the first and second magnetic surfaces of the magnetic block, combined with the parallel central axis feature, enables a more reasonable spatial layout when the magnetic blocks are arranged in a grid array. The unified central axis direction and the specific magnetic surface distribution help to maintain the stability of the entire magnet group magnetic field. In high-precision magnetic field measuring instruments, stable magnetic field is the basis for accurate measurement. This structure can reduce the magnetic field fluctuations caused by chaotic magnetic field direction or unreasonable magnetic surface layout, thereby improving the precision and stability of the measuring instrument.

[0013] Further, a 0.9mm gap is provided between any first magnetic block and adjacent second magnetic block.

[0014] The 0.9mm gap provides a certain buffer space for the interaction of the magnetic fields between adjacent magnetic blocks, avoiding the situation of excessive superposition or mutual interference of the magnetic fields when the magnetic blocks are in direct close contact. The gap between the magnetic blocks helps to reduce the energy loss caused by hysteresis. When the magnetic blocks are closely arranged without gaps, the magnetic domains are easily affected by each other during magnetization and demagnetization, resulting in large hysteresis loss. The 0.9mm gap provides a relatively independent space for the magnetic domains to move, making the magnetic blocks more smooth in the magnetization and demagnetization cycle, thereby reducing the hysteresis loss and improving the energy conversion efficiency of the entire magnet group. The presence of the gap provides a channel for heat dissipation. During the operation of the magnet group, heat may be generated due to hysteresis loss, eddy current loss, etc. The 0.9mm gap allows heat to be more easily transferred in the gap between the magnetic blocks. The gap space can be used to accommodate some protective materials or auxiliary materials. For example, some heat-conducting silicone can be filled in the gap to further enhance the heat dissipation effect, or some magnetic shielding materials can be filled to reduce the interference of external magnetic fields on the magnetic field of the magnet group, improving the anti-interference ability of the magnet group.

[0015] Further, a PET sheet is provided between the first and second magnetic blocks and installed in the gap. The PET sheet is used to buffer the mutual friction between the first and second magnetic blocks. Any gap corresponds to two PET sheets, and the thickness of the two PET sheets is adapted to the size of the gap. Four gaps are arranged around the positioning hole formed by the PET sheets, and the four corners of the positioning hole correspond to four magnetic blocks, respectively.

[0016] The PET sheets serve as a buffer between the first magnetic blocks and the second magnetic blocks, effectively preventing surface wear caused by direct friction between the magnetic blocks under daily use, equipment vibration, or slight external force. The two PET sheets fill the gaps, equivalent to adding a layer of "connection medium" to the structure of the entire grid array magnet group. They can constrain the relative positions of the magnetic blocks to some extent, preventing excessive displacement or misalignment of the magnetic blocks when subjected to external forces, further enhancing the overall structural stability of the magnet group, allowing it to better cope with various complex use environments. The four gaps between each pair of adjacent magnetic blocks form a positioning hole enclosed by the PET sheets, and the four corners of the positioning hole correspond to the four magnetic blocks. This structural design provides precise positioning reference for the magnetic blocks, making it easier to determine the relative positions of the magnetic blocks during assembly based on the positioning hole, which helps improve assembly accuracy and efficiency, reducing the risk of equipment performance degradation or failure caused by magnetic block position deviation. PET is an excellent electrical insulating material, and the PET sheets installed in the gaps can effectively isolate adjacent first and second magnetic blocks, preventing electrical short circuits that may occur under certain special circumstances (such as electrical faults, electrical leakage, etc.). Although PET itself does not have magnetic properties, filling the gaps between adjacent magnetic blocks will affect the interaction of the magnetic fields between them. By adjusting the thickness of the PET sheets (to match the size of the gaps), the distribution of the magnetic field between the magnetic blocks can be fine-tuned to some extent, making the magnetic field distribution more uniform and reasonable. When the PET sheets are filled in the gaps, they can change the movement environment of the magnetic domains between the magnetic blocks to some extent, making the magnetic domains more smooth during magnetization and demagnetization, thereby reducing hysteresis loss. PET has good chemical stability and can resist corrosion from various common chemicals.

[0017] Further, the first magnetic blocks and the second magnetic blocks are both permanent magnets, and the permanent magnets are made of neodymium iron boron material in the form of sintering.

[0018] Neodymium iron boron material has extremely high magnetic energy product, which enables the manufactured permanent magnets to generate a very strong magnetic field. In the grid array magnet group, this high magnetic field strength characteristic ensures that a larger magnetic force can be achieved in a smaller space. The sintered neodymium iron boron permanent magnet has a relatively stable internal microstructure, and its magnetic field performance can remain stable for a long time under normal use environment. The sintered neodymium iron boron permanent magnet generally has good mechanical properties, such as certain hardness and toughness. In the grid array magnet group, this allows the magnetic blocks to withstand certain external impact during installation and use without being easily damaged. Due to the high magnetic field strength, stability, and good material properties of the neodymium iron boron permanent magnet, the grid array magnet group can be widely used in many fields.

[0019] Further, the surfaces of the first magnetic block and the second magnetic block are subjected to nickel plating treatment for preventing oxidation and corrosion of the magnets.

[0020] The nickel plating layer forms a dense protective film on the surface of the magnetic block, effectively blocking the contact between oxygen in the air and the neodymium iron boron material inside the magnetic block. The neodymium iron boron material itself is prone to oxidation in the air, and the nickel plating treatment is like putting on a layer of “protective armor” for the magnetic block, greatly reducing the possibility of oxidation and prolonging the time for the magnetic block to maintain its original performance. In actual application environments, the magnetic block may come into contact with various corrosive media, such as moisture, acid and alkali solutions, etc. The nickel plating layer has good corrosion resistance and can resist the erosion of these common corrosive media on the magnetic block. The presence of the nickel layer makes the physical and chemical properties of the surface of the magnetic block more stable, and when it comes into contact or works with other components, it can better adapt to various environments and conditions.

[0021] Further, the first magnetic block and the second magnetic block are magnetized in the thickness direction, so that the magnetic field of the magnetic block in the thickness direction is enhanced.

[0022] By magnetizing in the thickness direction, the magnetic field strength of the first magnetic block and the second magnetic block in this direction can be significantly improved. Magnetizing uniformly in the thickness direction helps to optimize the magnetic field distribution of the entire magnetic block array in this direction. Since the magnetic field of each magnetic block in the thickness direction is enhanced and consistent, the magnetic field in this dimension is more uniform, reducing the situation of uneven local magnetic field strength. Many practical applications have specific requirements for the direction and strength of the magnetic field. Magnetizing in the thickness direction meets the needs of those application scenarios that focus on the magnetic field effect in this direction. For example, in the design of some magnetic sensors, if the sensor mainly detects the change of the magnetic field in the thickness direction to achieve a specific function, the enhanced magnetic field in the thickness direction can improve the sensitivity and accuracy of the sensor. In some devices, the magnetic block array needs to work with other components, such as electromagnetic induction coils, magnetic shielding covers, etc. When the magnetic field of the magnetic block in the thickness direction is enhanced, its cooperation effect with these related components can be optimized. For example, when cooperating with an electromagnetic induction coil, the enhanced magnetic field in the thickness direction can improve the efficiency of electromagnetic induction, making the conversion between electric energy and magnetic field energy smoother.

[0023] Further, the first magnetic block and the second magnetic block are subjected to 24h neutral salt spray testing, so that the Gauss value of the surface of the N-pole of the manufactured magnetic block is not less than 2700Gs.

[0024] 24h neutral salt spray test is an effective test means for the corrosion resistance of the magnetic block. In actual use, the magnetic block can be exposed to harsh conditions such as salt-containing, high humidity and the like similar to the salt spray environment, such as the magnetic element in the industrial equipment in the coastal area or the electronic equipment used outdoors. Through this test, it can be ensured that the magnetic block has sufficient corrosion resistance in similar environments to maintain its performance and service life. The gauss value of the N-pole surface of the magnetic block is not less than 2700Gs, which provides a reliable quantitative standard for the magnetic field strength. This means that the magnetic block can still maintain sufficient magnetic field strength after being subjected to a certain degree of corrosion challenge (such as a salt spray environment) in various use environments.

[0025] The magnetic field is stable and uniform, and the magnetic block is alternately arranged, the specific grid array structure, the appropriate gap and the PET sheet are designed to form a stable internal balance force distribution system, effectively resist external magnetic field interference, and can produce a stable and uniform magnetic field. It is suitable for scenes with high magnetic field precision requirements; compact and efficient structure, the regular structure of nine grids or twelve grids makes the magnetic block layout compact, accommodates more magnetic blocks in limited space, enhances the magnetic force coupling effect, improves the electric energy transmission efficiency, and is convenient for small-sized equipment integration application; reliable and durable performance, the permanent magnet is sintered from neodymium iron boron material, has high magnetic energy product and stable microstructure, and the surface is plated with nickel. After 24h neutral salt spray test, oxidation resistance, corrosion resistance, and the magnetic block in the thickness direction enhances the magnetic field strength, the overall performance is reliable and durable, and can fully meet various application requirements. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 It is a whole structure schematic view of the grid array type magnet group of the utility model;

[0027] Fig. 2 It is a structure schematic view of the nine-grid array type structure and the twelve-grid array type structure without PET sheet of the utility model.

[0028] The reference signs include: 1, first magnetic block; 11, first magnetic surface; 2, second magnetic block; 21, second magnetic surface; 3, gap; 4, PET sheet; 5, positioning hole. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in combination with examples and drawings, and the content mentioned in the implementation manner is not a limitation of the utility model.

[0030] Please refer to Figs. 1-2As shown, the utility model relates to a kind of palace grid array formula magnet group, including first magnetic block 1, second magnetic block 2, the quantity of first magnetic block 1, second magnetic block 2 is multiple, multiple first magnetic block 1, multiple second magnetic block 2 are alternately arranged into multiple magnet rows and / or multiple magnet columns along horizontal and / or vertical direction, and multiple magnet rows and / or multiple magnet columns constitute the structure of square array formula;In any magnet row or any magnet column, the magnetic property of the two ends of first magnetic block 1, second magnetic block 2 close to each other is different.

[0031] When actually used, since first magnetic block 1 and second magnetic block 2 are alternately arranged into multiple rows and multiple columns of rectangular array formula structure along horizontal and / or vertical direction, relatively uniform magnetic field can be formed in the area covered by array.The combination of multiple magnetic blocks can superimpose magnetic field in local area, and compared with single magnetic block, the overall magnetic field intensity can be significantly enhanced.In the equipment needing larger magnetic field force, such as electromagnetic concentrator, using this palace grid array formula magnet group can improve the adsorption and separation efficiency of mineral substance, and enhance the work efficiency of equipment.The magnetic property of the two ends of first magnetic block 1, second magnetic block 2 close to each other is different, which makes there be mutual attraction between adjacent magnetic blocks.In the whole array structure, these attractive forces interact, form an inherent balanced force distribution system, and this balanced force distribution helps to improve the stability and reliability of the whole system, and reduce structural deformation or damage caused by external interference.By changing the size, shape, material and spacing between first magnetic block 1 and second magnetic block 2, etc., the adsorption force of magnet group can be flexibly adjusted.

[0032] Specifically, any first magnetic block 1 of any magnet row and / or magnet column of rectangular array formula structure is adjacent to second magnetic block 2, any first magnetic block 1, second magnetic block 2 in square array formula structure is enclosed by second magnetic block 2, first magnetic block 1 adjacent thereto to form palace grid unit, and square array formula structure constitutes palace grid array formula structure via palace grid unit.

[0033] In actual use, each grid cell is enclosed by adjacent magnetic blocks with different magnetism. This structure can promote the focusing effect of the magnetic field inside the grid cell to a certain extent. Due to the existence of the grid cell, a magnetic field gradient is formed between adjacent grid cells. By reasonably designing the size of the grid cell, the difference in magnetic strength of the magnetic blocks, and other parameters, the magnetic field gradient can be finely adjusted. In a magnetic fluid sealing device, an accurate magnetic field gradient can better control the distribution and flow state of the magnetic fluid, thereby achieving a more efficient and stable sealing effect, reducing the risk of leakage, and improving the service life and reliability of the sealing device. The mutual connection and enclosure of the grid cells form an organic whole for the entire grid array structure. The magnetic blocks of each grid cell support and restrain each other, which can better resist external mechanical stress and deformation compared to a simple row-column arrangement structure. The form of the grid cell facilitates the integration of other functional components within each cell or between cells. For example, a small electromagnetic induction coil can be embedded in the grid cell to collect electrical energy or convert signals using the magnetic field changes generated by the grid array magnet group. The layout of the grid cells helps to optimize the uniformity of the magnetic field distribution in a larger space range, such as a magnetic field annealing furnace for semiconductor material preparation. The grid array structure can reduce local non-uniformity in the magnetic field, ensuring that the material is subjected to a uniform and consistent magnetic field throughout the processing space, improving the consistency of material performance and the stability of product quality.

[0034] In actual use, the grid array structure enhances the magnetic force coupling effect between the magnetic blocks. The close opposite attraction relationship between adjacent first magnetic blocks 1 and second magnetic blocks 2 forms an efficient magnetic force network throughout the array. This structure can improve the efficiency of electrical energy transmission and reduce energy loss. The grid array design allows more magnetic blocks to be accommodated in a limited space. This compact structure is very beneficial for miniaturized magnetic devices. This regular grid array structure is less likely to experience local magnetic field distortion when subjected to external non-uniform magnetic field interference due to the stability of the interaction between each grid cell (i.e., the cell composed of adjacent first magnetic blocks 1 and second magnetic blocks 2) within the structure.

[0035] Specifically, the first magnetic blocks 1 and the second magnetic blocks 2 have the same structure, and the number of magnetic blocks is set to nine or twelve, and the grid array structure is formed as a nine-grid array structure or a twelve-grid array structure.

[0036] In actual use, when the number of magnetic blocks is set to nine to form a nine-square array structure or twelve to form a twelve-square array structure, the magnetic field distribution inside the entire array is more uniform due to the same and regular arrangement of the magnetic block structures, reducing the local unevenness of the magnetic field strength caused by the difference in magnetic block layout. The specific number of magnetic blocks (nine or twelve) facilitates precise regulation of the magnetic field strength of the entire square array structure by changing the magnetic strength and other parameters of individual magnetic blocks. Because of its regular and relatively fixed layout, it is more predictable and operable when calculating and adjusting the magnetic field strength. The nine-square array structure and the twelve-square array structure are very regular in form and have high symmetry. This regularity makes the entire magnet group occupy a more compact and reasonable space inside the device, allowing better integration with other components. Whether it is a nine-square or a twelve-square array structure, it can be widely used in many fields due to its optimized magnetic field characteristics, compact and regular structure, and ease of collaborative design.

[0037] Specifically, the magnetic block has a first magnetic surface 11 with N-pole magnetism and a second magnetic surface 21 with S-pole magnetism, and the first magnetic surface 11 and the second magnetic surface 21 of any magnetic block are located on both sides of the square plane formed by the magnetic row and the magnetic column, and the central axis direction of any magnetic block is parallel to the central axis direction of another magnetic block.

[0038] In actual use, since the central axis direction of any magnetic block is parallel to the central axis direction of another magnetic block, the magnetic field generated by the entire square array magnet group has a clear and uniform direction in a macroscopic sense. In a magnetic field energy collection device, a uniform magnetic field direction helps to optimize the layout of the coil and other energy collection components, allowing them to cut magnetic field lines more efficiently and thus improve the efficiency of converting magnetic field energy into electrical energy. The magnetic block has a first magnetic surface 11 with N-pole magnetism and a second magnetic surface 21 with S-pole magnetism, and is located on both sides of the square plane. This layout allows the magnetic field to form a more symmetrical and effective distribution on both sides of the square plane. The distribution of the first magnetic surface 11 and the second magnetic surface 21 of the magnetic block, combined with the parallel central axis feature, allows the magnetic block to achieve a more reasonable spatial layout when arranged in a square array. The uniform central axis direction and the specific magnetic surface distribution help to maintain the stability of the magnetic field of the entire magnet group. In high-precision magnetic field measuring instruments, stable magnetic fields are the basis for accurate measurement. This structure can reduce magnetic field fluctuations caused by chaotic magnetic field direction or unreasonable magnetic surface layout, thereby improving the precision and stability of the measuring instrument.

[0039] Specifically, a gap 3 of 0.9 mm is provided between any first magnetic block 1 and the adjacent second magnetic block 2.

[0040] In actual use, the gap 3 of 0.9 mm allows a certain buffer space for the magnetic field interaction between adjacent magnetic blocks, avoiding the situation of excessive superposition or mutual interference of the magnetic field when the magnetic blocks are in close contact. The gap 3 between the magnetic blocks helps to reduce the energy loss caused by hysteresis. When the magnetic blocks are closely arranged without the gap 3, the magnetic domains are easily affected by each other during magnetization and demagnetization, resulting in large hysteresis loss. The gap 3 of 0.9 mm gives the magnetic domains a relatively independent space for movement, making the magnetic blocks more smooth during magnetization and demagnetization cycles, thereby reducing the hysteresis loss and improving the energy conversion efficiency of the entire magnet group. The presence of the gap 3 provides a channel for heat dissipation. During the operation of the magnet group, heat may be generated due to hysteresis loss, eddy current loss, etc. The gap 3 of 0.9 mm allows the heat to be easily transferred in the gap between the magnetic blocks. The gap 3 space can be used to accommodate some protective materials or auxiliary materials. For example, some heat-conducting silicone can be filled in the gap 3 to further enhance the heat dissipation effect, or some magnetic shielding materials can be filled to reduce the interference of external magnetic fields on the magnetic field of the magnet group and improve the anti-interference ability of the magnet group.

[0041] Specifically, the first magnetic block 1 and the second magnetic block 2 are provided with a PET sheet 4 installed in the gap 3, and the PET sheet 4 is used to buffer the mutual friction between the first magnetic block 1 and the second magnetic block 2. Any gap 3 corresponds to two PET sheets 4, and the thickness of the two PET sheets 4 is adapted to the size of the gap 3. Four gaps 3 are formed between two adjacent PET sheets 4, and the positioning hole 5 surrounded by the PET sheet 4 is formed between the four gaps 3. The four gaps 3 are distributed around the positioning hole 5, and the four corners of the positioning hole 5 correspond to the four magnetic blocks, respectively.

[0042] In actual use, the PET sheet 4 plays a buffering role between the first magnetic block 1 and the second magnetic block 2, effectively avoiding surface wear caused by direct friction between the magnetic blocks under daily use, equipment vibration or slight external force. The two PET sheets 4 are filled in the gap 3, which is equivalent to adding a layer of "connection medium" to the structure of the entire grid array type magnet group. They can constrain the relative position of the magnetic blocks to a certain extent, prevent the magnetic blocks from excessive displacement or misplacement when subjected to external force, and further enhance the overall structural stability of the magnet group, so that it can better cope with various complex use environments. The four gaps between each other form a positioning hole surrounded by the PET sheet, and the four corners of the positioning hole correspond to the four magnetic blocks respectively. This structure design provides accurate positioning reference for the magnetic blocks, which can easily determine the relative position of the magnetic blocks according to the positioning hole during assembly, which is conducive to improving the accuracy and efficiency of assembly and reducing the risk of equipment performance degradation or failure caused by magnetic block position deviation. PET is an excellent electrical insulating material, and the PET sheet 4 installed in the gap 3 can effectively isolate the adjacent first magnetic block 1 and second magnetic block 2, preventing electrical short circuit that may occur under certain special circumstances (such as electrical failure, electrical leakage, etc.). Although the PET sheet 4 itself does not have magnetism, it will have a certain impact on the magnetic field interaction between adjacent magnetic blocks when filled in the gap 3. By reasonably adjusting the thickness of the PET sheet 4 (so that it is compatible with the size of the gap 3), the distribution of the magnetic field between the magnetic blocks can be fine-tuned to a certain extent, making the magnetic field distribution more uniform and reasonable. When the PET sheet 4 is filled in the gap 3, it can change the movement environment of the magnetic domains between the magnetic blocks to a certain extent, making the magnetic domains more smooth during magnetization and demagnetization, thereby reducing the magnetic hysteresis loss. PET has good chemical stability and can resist corrosion of various common chemicals.

[0043] Specifically, the first magnetic block 1 and the second magnetic block 2 are both permanent magnets, which are made of neodymium iron boron material in the form of sintering.

[0044] In actual use, the neodymium iron boron material has very high magnetic energy product, which enables the manufactured permanent magnet to generate a very strong magnetic field. In the grid array type magnet group, this high magnetic field strength characteristic can ensure that a larger magnetic force is achieved in a smaller space. The sintered neodymium iron boron permanent magnet has a relatively stable internal microstructure, and its magnetic field performance can remain stable for a long time under normal use environment. The sintered neodymium iron boron permanent magnet generally has good mechanical properties, such as certain hardness and toughness. In the grid array type magnet group, this enables the magnetic blocks to withstand certain external impact during installation and use without being easily damaged. Due to the high magnetic field strength, stability and good material properties of the neodymium iron boron permanent magnet, the grid array type magnet group can be widely used in many fields.

[0045] Specifically, the surfaces of the first magnetic block 1 and the second magnetic block 2 are subjected to nickel plating treatment for preventing oxidation and corrosion of the magnets.

[0046] In actual use, the nickel plating layer forms a dense protective film on the surface of the magnetic block, which can effectively block the contact between oxygen in the air and the neodymium iron boron material inside the magnetic block. The neodymium iron boron material itself is prone to oxidation in the air, and the nickel plating treatment is like putting on a layer of "protective armor" for the magnetic block, greatly reducing the possibility of oxidation and prolonging the time for the magnetic block to maintain its original performance. In actual application environments, the magnetic block may come into contact with various corrosive media, such as moisture, acid and alkali solutions, etc. The nickel plating layer has good corrosion resistance and can resist the erosion of these common corrosive media on the magnetic block. The presence of the nickel layer makes the physical and chemical properties of the surface of the magnetic block more stable, and when it comes into contact or works with other components, it can better adapt to various environments and conditions.

[0047] Specifically, the first magnetic block 1 and the second magnetic block 2 are magnetized in the thickness direction to enhance the magnetic field of the magnetic block in the thickness direction.

[0048] In actual use, by magnetizing in the thickness direction, the magnetic field strength of the first magnetic block 1 and the second magnetic block 2 in this direction can be significantly improved. Magnetizing uniformly in the thickness direction helps to optimize the magnetic field distribution of the entire grid array type magnet group in this direction. Since the magnetic field of each magnetic block is enhanced and consistent in the thickness direction, the magnetic field is more uniform in this dimension, reducing the situation of uneven local magnetic field strength. Many practical applications have specific requirements for the direction and strength of the magnetic field, and magnetizing in the thickness direction meets the application scenarios that focus on the magnetic field effect in this direction. For example, in the design of some magnetic sensors, if the sensor mainly detects the change of the magnetic field in the thickness direction to realize a specific function, then the enhanced magnetic field in the thickness direction can improve the sensitivity and accuracy of the sensor. In some devices, the grid array type magnet group needs to work with other components, such as electromagnetic induction coils, magnetic shielding covers, etc. When the magnetic block has an enhanced magnetic field in the thickness direction, its cooperation with these related components can be optimized. For example, when cooperating with an electromagnetic induction coil, the enhanced magnetic field in the thickness direction can improve the efficiency of electromagnetic induction, making the conversion between electric energy and magnetic field energy smoother.

[0049] Specifically, the first magnetic block 1 and the second magnetic block 2 are subjected to 24h neutral salt spray testing, so that the Gauss value of the surface of the N-pole of the manufactured magnetic block is not less than 2700Gs.

[0050] In actual use, the 24h neutral salt spray test is an effective test method for the corrosion resistance of the magnetic block. In actual use, the magnetic block can be exposed to harsh conditions such as salt-containing, high-humidity, and the like, similar to a salt spray environment, such as industrial equipment in a coastal area or a magnetic element in an electronic device used outdoors. Through this test, it can be ensured that the magnetic block has sufficient corrosion resistance in a similar environment to maintain its performance and service life. The gauss value of the N-pole surface of the magnetic block is not less than 2700Gs, which provides a reliable quantitative standard for the magnetic field strength. This means that the magnetic block can still maintain sufficient magnetic field strength under various use environments, especially after experiencing a certain degree of corrosion challenge (such as a salt spray environment).

[0051] The above is only a preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the specification should not be understood as limiting the present application.

Claims

1. A grid array magnet assembly, characterized in that: The invention comprises a first magnetic block (1) and a second magnetic block (2), wherein the number of the first magnetic block (1) and the number of the second magnetic block (2) are both multiple, and the multiple first magnetic blocks (1) and the second magnetic blocks (2) are alternately arranged in the horizontal and / or vertical direction to form multiple magnet rows and / or multiple magnet columns, and the multiple magnet rows and / or multiple magnet columns form a rectangular array structure; in any magnet row or any magnet column, the two ends of the first magnetic block (1) and the second magnetic block (2) that are close to each other have different magnetic properties.

2. The grid array magnet assembly according to claim 1, characterized in that: Any first magnetic block (1) in any magnet row and / or magnet column of the rectangular array structure is adjacent to the second magnetic block (2); any first magnetic block (1) and second magnetic block (2) in the rectangular array structure are enclosed by the adjacent second magnetic block (2) and first magnetic block (1) to form a grid unit; the rectangular array structure is formed into a grid array structure.

3. The grid array magnet assembly according to claim 2, characterized in that: The first magnetic block (1) and the second magnetic block (2) have the same structure, the number of magnetic blocks is set to nine or twelve, and the grid array structure is formed into a nine-grid array structure or a twelve-grid array structure.

4. The grid array magnet assembly according to claim 3, characterized in that: The magnetic block has a first magnetic surface containing N-pole magnetism and a second magnetic surface containing S-pole magnetism. The first magnetic surface and the second magnetic surface of any magnetic block are respectively located on both sides of the grid plane formed by the magnet rows and magnet columns. The central axis direction of any magnetic block is parallel to the central axis direction of the other magnetic block.

5. The grid array magnet assembly according to claim 1, characterized in that: A gap (3) of 0.9 mm is provided between any first magnetic block (1) and an adjacent second magnetic block (2).

6. The grid array magnet assembly according to claim 5, characterized in that: A PET sheet (4) installed in the gap (3) is provided between the first magnetic block (1) and the second magnetic block (2). The PET sheet (4) is used to buffer the mutual friction between the first magnetic block (1) and the second magnetic block (2). Any gap (3) corresponds to two PET sheets (4). The thickness of the two PET sheets (4) is adapted to the size of the gap (3). Positioning holes (5) formed by the PET sheets (4) are formed between four adjacent gaps (3). The four gaps (3) are distributed around the positioning hole (5), and the four corners of the positioning hole (5) correspond to the four magnetic blocks respectively.

7. The grid array magnet assembly according to claim 1, characterized in that: The first magnetic block (1) and the second magnetic block (2) are both permanent magnets, and the permanent magnet material of the magnetic blocks is made of neodymium iron boron material in a sintered form.

8. The grid array magnet assembly according to claim 1, characterized in that: The surfaces of the first magnetic block (1) and the second magnetic block (2) are both nickel-plated to prevent oxidation and corrosion of the magnetic blocks.

9. The grid array magnet assembly according to claim 1, characterized in that: The first magnetic block (1) and the second magnetic block (2) are both magnetized in the thickness direction so that the magnetic field of the magnetic blocks in the thickness direction is enhanced.

10. The grid array magnet assembly according to claim 1, characterized in that: The first magnetic block (1) and the second magnetic block (2) are both subjected to a 24-hour neutral salt spray test, so that the Gauss value of the surface of the N pole of the manufactured magnetic block is not less than 2700Gs.

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