Small magnetic resonance main magnetic field insert structure

Abstract

The utility model relates to the technical field of food detection, in particular to a small magnetic resonance main magnetic field inserting piece structure which comprises a support used for supporting the whole structure. The magnetic plate comprises a main magnetic plate body and a bundle magnetic plate body, the main magnetic plate body and the bundle magnetic plate body jointly form an insertion piece structure, and a plurality of neodymium-iron-boron permanent magnets are inlaid in the main magnetic plate body. A strong main magnetic field environment can be constructed in a limited space, the field intensity of a main imaging area reaches 165 mT, a high-intensity magnetic field meeting the detection requirement can still be provided for application such as food detection on the premise that the requirement for miniaturization of equipment is met, 36 neodymium iron boron permanent magnets are embedded in each group of main magnetic plates, 26 magnetic blocks are embedded in each bundle magnetic plate, and the magnetic field intensity of each group of main magnetic plates is adjusted. By means of the specific magnet layout mode and the design that the main magnet is arranged in the middle of the beam magnetic plate, the uniformity of the magnetic field of the main imaging area can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to food detection technical field more specifically, the utility model relates to a kind of small magnetic resonance main magnetic field insert piece structure. BACKGROUND

[0002] Under the background of the continuous expansion of the application of magnetic resonance technology, especially in the low-field nuclear magnetic resonance technology used in medical, industrial or food industry, etc. Scene, there are higher requirements for the performance and structural design of magnetic resonance equipment, low-field nuclear magnetic resonance technology is based on the interaction of nuclear spin and magnetic field, by detecting the relaxation time of hydrogen nucleus in sample to obtain the molecular dynamics information of sample, especially in food adulteration detection, low-field nuclear magnetic resonance technology shows significant advantages, its small magnetic resonance equipment can be used for on-site rapid detection in food processing workshop, agricultural market and other places due to its portability and flexibility.

[0003] The insert piece structure of small magnetic resonance main magnetic field is the core structure of the equipment, and its production and manufacturing are to meet the needs of food science research and food quality detection instrument, but in the process of use, the main magnetic field structure of conventional large magnetic resonance equipment is complex and large, which is not suitable for on-site rapid detection with strict restrictions on equipment volume and weight, such as instant detection of food adulteration in food processing workshop, agricultural market and other places, on the other hand, the traditional structure is difficult to ensure good performance while miniaturizing in terms of magnetic field uniformity and stability, the non-uniformity or instability of magnetic field will lead to deviation of detected relaxation time data, and then affect the qualitative and quantitative analysis results of food sample composition and structure, and reduce the accuracy of food adulteration detection.

[0004] Therefore, it is of important practical significance and market demand to develop a new type of small magnetic resonance equipment main magnetic field structure to improve the performance and practicability of the equipment. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of small magnetic resonance main magnetic field insert piece structure to solve the problem that conventional large magnetic resonance main magnetic field structure is complex and large in the above background technology, not suitable for on-site rapid detection, and traditional structure is difficult to ensure that magnetic field is uniform and stable while miniaturizing, which will cause relaxation time data deviation and reduce the accuracy of food adulteration detection.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of small magnetic resonance main magnetic field insert piece structure, comprising: support, for supporting the whole structure;Magnetic plate, the magnetic plate includes main magnetic plate and beam magnetic plate, the main magnetic plate and beam magnetic plate jointly constitute insert piece structure, the main magnetic plate is inlaid with multiple Nd-Fe-B permanent magnets, the beam magnetic plate is inlaid with multiple magnetic blocks;The main magnetic plate is arranged in the middle of beam magnetic plate.

[0007] Preferably, the magnetic block is 12*12*12mm³ in volume, and the surface magnetic field strength of the Nd-Fe-B permanent magnet (3) is 5660 Gauss.

[0008] Preferably, the Nd-Fe-B permanent magnet uses 348 blocks in the whole main magnetic field system, and the main imaging area field strength reaches 165mT.

[0009] Preferably, each group of the main magnetic plate is inlaid with 36 Nd-Fe-B permanent magnets, and the beam magnetic plate is inlaid with 26 magnetic blocks, the distance from the center point of the magnetic block in the innermost layer to the axis of the beam magnetic plate is 45mm, and the distance from the center point of the magnetic block in the outermost layer to the axis of the beam magnetic plate is 65mm.

[0010] Preferably, the support and the top of the magnetic plate are provided with a control panel, the control panel is provided with a reserved hole, and a long pin is sleeved in the reserved hole.

[0011] Preferably, the insert piece structure precisely controls the repulsive force between the magnetic plates, and the two ends of the insert piece structure are thickened.

[0012] Compared with the prior art, the utility model has the beneficial effects as follows:

[0013] 1、 the utility model discloses a through the inlaying of 348 Nd-Fe-B permanent magnets with the surface magnetic field strength of 5660 Gauss in the magnetic plate, can build the main magnetic field environment of stronger in the limited space, makes the main imaging area field strength reach 165mT, still can provide the high-intensity magnetic field satisfying the detection demand for food detection etc.

[0014] 2、The insert piece structure formed by the main magnetic plate and the magnetic field concentrating plate can accurately control the repulsion force between the magnetic plates, the insert piece structure makes the magnetic field interaction between the magnetic plates more orderly due to the characteristic that the same poles repel each other between the magnets, reduces the unstable factors caused by the repulsion force, ensures the stability of the equipment during operation, the stable contact between the magnets is ensured through the pre-pressing structure at both ends, which can effectively resist the strain generated by the structure in actual work, reduces the situation that the magnets are loose or separated due to strain, meanwhile, the both ends of the insert piece structure are thickened, which further enhances the strength of the structure, because the both ends are usually the parts with the largest stress in the whole structure, the thickening design can make the insert piece structure better bear external force, improve the reliability of the equipment, and prolong the service life of the equipment;

[0015] 3、The main magnetic plate is arranged in the middle of the magnetic field concentrating plate, and the magnetic blocks on the magnetic field concentrating plate are distributed around the main magnetic plate, so that the magnetic field generated by the main magnetic plate can be more effectively confined in a specific area, the leakage of the magnetic field to the surrounding space is reduced, and the utilization efficiency of the magnetic field is improved, so that the demand for magnet materials can be reduced under the condition of achieving the same imaging effect, thereby reducing the manufacturing cost of the equipment, and the arrangement mode of the main magnetic plate in the middle of the magnetic field concentrating plate is favorable for the assembly of the insert piece structure and the cooperation with other components, in the assembly process, the relative position of the magnetic field concentrating plate and the main magnetic plate can be more conveniently determined based on the main magnetic plate in the middle, so that the accuracy and consistency of the insert piece structure are ensured, meanwhile, the layout is also convenient for the connection and fixation of the insert piece structure and other supporting structures such as the support, so that the structure of the whole small-sized magnetic resonance main magnetic field system is more compact and stable, in addition, the reasonable structure design is also favorable for the later maintenance and repair, reduces the use cost, and improves the practicability of the equipment in the portable food detection scene. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is a main magnetic plate schematic diagram of the utility model;

[0018] Figure 3 It is a magnetic field concentrating plate schematic diagram of the utility model;

[0019] Figure 4 It is a magnetic field distribution schematic diagram of the utility model;

[0020] Figure 5 It is a repulsion force between magnetic plates indication arrow schematic diagram of the utility model.

[0021] Marked number in figure: 1, support; 2, main magnetic plate; 3, magnetic field concentrating plate; 4, neodymium-iron-boron permanent magnet; 5, magnetic block; 6, control panel; 7, long pin. DETAILED DESCRIPTION

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-3 As shown, this utility model provides a small magnetic resonance main magnetic field insert structure, a support 1 for supporting the entire structure; a magnetic plate, the magnetic plate including a main magnetic plate 2 and a beam magnetic plate 3, the main magnetic plate 2 and the beam magnetic plate 3 together form the insert structure, the main magnetic plate 2 is set in the middle of the beam magnetic plate 3 for magnetic field confinement, the main magnetic plate 2 is embedded with multiple neodymium iron boron permanent magnets 4, the beam magnetic plate 3 is embedded with multiple magnetic blocks 5, the magnetic blocks 5 have a volume of 12×12×12mm³, the surface magnetic field strength of the neodymium iron boron permanent magnets 4 is 5660 Gauss, Gauss is the unit of magnetic field strength, which is beneficial for guiding the main magnetic field and precisely controlling the beam path. 348 neodymium iron boron permanent magnets 4 are used in the entire main magnetic field system, and the field strength in its main imaging area reaches 165mT, where mT is the unit used to measure magnetic field strength.

[0024] The multiple neodymium iron boron permanent magnets 4 embedded in the main magnetic plate 2 are the core components for generating the magnetic field. The neodymium iron boron permanent magnets 4 have extremely high magnetism, and the surface magnetic field strength of each neodymium iron boron permanent magnet 4 reaches 5660 Gauss. When 348 neodymium iron boron permanent magnets 4 are applied to the entire main magnetic field system, they together construct a strong main magnetic field environment, enabling the field strength in the main imaging area to reach 165mT.

[0025] Multiple magnetic blocks 5 embedded on the magnetic beam 3 cooperate with the neodymium iron boron permanent magnets 4 of the main magnetic plate 2 to guide the main magnetic field. The magnetic blocks 5 are distributed on the magnetic beam 3 in a specific layout. The distance from the center point of the innermost magnetic block 5 to the axis of the magnetic beam 3 is 45mm, and the distance from the center point of the outermost magnetic block 5 to the axis of the magnetic beam 3 is 65mm. This layered and regular distribution can accurately adjust the direction and path of the main magnetic field, guide the main magnetic field to the required area, and thus accurately control the beam path to meet the strict requirements of magnetic field distribution for applications such as small magnetic resonance imaging.

[0026] In the small magnetic resonance main magnetic field insert structure, the main magnetic plate 2 is arranged in the middle of the beam magnetic plate 3, the main magnetic plate 2 generates the main magnetic field, and the magnetic block 5 inlaid on the beam magnetic plate 3 plays a role in assisting the constraint of the magnetic field. The main magnetic plate 2 is arranged in the middle of the beam magnetic plate 3, which can make the magnetic field generated by the main magnetic plate 2 and the magnetic field generated by the magnetic block 5 on the beam magnetic plate 3 better cooperate with each other. The magnetic block 5 on the beam magnetic plate 3 is distributed around the main magnetic plate 2, which can more effectively confine the magnetic field generated by the main magnetic plate 2 in a specific area, reducing the leakage of the magnetic field to the surrounding space. This is very critical to improve the utilization efficiency of the magnetic field, and more magnetic field energy can be concentrated in the main imaging area to meet the requirements of magnetic resonance imaging on magnetic field strength and distribution. Moreover, the middle position makes the distance between the main magnetic plate 2 and each magnetic block 5 on the beam magnetic plate 3 relatively uniform, and the adjusting effect of the magnetic block 5 on the magnetic field of the main magnetic plate 2 is more balanced.

[0027] In addition, the arrangement of the main magnetic plate 2 in the middle of the beam magnetic plate 3 is also conducive to the assembly of the insert structure and the cooperation with other components. During the assembly process, the relative position of the beam magnetic plate 3 and the main magnetic plate 2 can be more easily determined based on the main magnetic plate 2 in the middle, ensuring the accuracy and consistency of the insert structure. At the same time, this layout also facilitates the connection and fixation of the insert structure with other support structures such as the support 1, making the structure of the entire small magnetic resonance main magnetic field system more compact and stable.

[0028] As shown in Figure 5 , the insert structure precisely controls the repulsive force between the magnetic plates, ensures stable contact between the magnets through the pre-pressing structure at both ends, and reduces loosening or separation caused by strain. The two ends of the insert structure are thickened.

[0029] Due to the characteristic of repulsion between magnets of the same pole, repulsive force will be generated between the main magnetic plate 2 and the beam magnetic plate 3. The insert structure can precisely control this repulsive force through its unique design. The existence of the insert structure makes the magnetic field interaction between the magnetic plates more orderly, reducing the unstable factors caused by repulsive force.

[0030] The pre-pressing structure at both ends ensures stable contact between the magnets. In actual work process, the structure will be subjected to various forces and may be strained. The pre-pressing structure can effectively resist these strains and reduce the loosening or separation of the magnets caused by strain. At the same time, the two ends of the insert structure are thickened, which further enhances the strength of the structure. Because the two ends are usually the most stressed parts in the entire structure, the thickening design can make the insert structure better withstand external forces and ensure the stability of the entire insert structure during long-term operation.

[0031] As shown in Figure 2 , Figure 3 and Figure 4As shown, each of the main magnetic plates 2 is inlaid with 36 neodymium-iron-boron permanent magnets 4, and each of the beam magnetic plates 3 is inlaid with 26 magnetic blocks 5. This specific magnet arrangement helps to improve the uniformity of the magnetic field in the main imaging area, which is crucial for small-sized magnetic resonance imaging applications. A uniform magnetic field ensures the accuracy and reliability of the imaging results. The reasonable number and distribution of magnets make the magnetic field more stable and uniform in the main imaging area, avoiding imaging distortion and other problems caused by uneven magnetic fields.

[0032] For details, please refer to the following Figure 4 By using COMSOL simulation software and based on Halbach array magnetic analysis, the distribution of magnetic blocks 5 is designed to accurately achieve a uniform and high-strength magnetic field in a limited volume. Halbach array itself has unique magnetic field characteristics, which can effectively enhance the magnetic field strength on one side and reduce the magnetic field leakage on the other side. During the simulation process, the arrangement of magnetic blocks 5 is optimized to achieve the best cooperation of the magnetic fields generated by the magnetic blocks 5 on the main magnetic plates 2 and the beam magnetic plates 3. As mentioned earlier, the neodymium-iron-boron permanent magnets 4 in the main magnetic plates 2 generate a main magnetic field, and the magnetic blocks 5 on the beam magnetic plates 3 guide and constrain the main magnetic field. In addition, based on the optimized distribution of Halbach array, the uniformity and strength of the magnetic field in the main imaging area are further improved.

[0033] Moreover, through simulation, the optimal parameters of the thickened structure at both ends of the insert can be determined, which can better withstand the larger stress at both ends and ensure the stability of the structure. At the same time, based on mechanical analysis, the pre-pressing structure is optimized to more effectively resist strain and reduce the risk of magnet loosening or separation, further improving the reliability and stability of the equipment. This solves the related problems caused by unreasonable structure design in existing small-sized magnetic resonance equipment, prolongs the service life of the equipment, and reduces maintenance costs.

[0034] Furthermore, in terms of miniaturization, the arrangement of magnetic blocks 5 is precisely designed to achieve a high-strength uniform magnetic field in a limited volume, avoiding the use of larger magnet structures to achieve the same magnetic field performance. This meets the strict space requirements of portable food detection equipment. In terms of cost, the optimized distribution of magnetic blocks 5 improves the efficiency of magnetic field utilization, reduces unnecessary use of magnet materials, and reduces manufacturing costs. Moreover, stable magnetic field performance and reliable structure design ensure that the equipment can operate stably in complex environments such as emergency sites and remote areas, meeting the demand for rapid and convenient magnetic resonance imaging in portable food detection scenarios and promoting the development of portable magnetic resonance equipment.

[0035] As shown in the following Figure 1 The control panel 6 is installed on the top of the support 1 and the magnetic plates, and a reserved hole is formed in the control panel 6. A long pin 7 is sleeved in the reserved hole.

[0036] It is worth mentioning that during the installation process, the long pin 7 plays a role similar to a connector, through the reserved holes of the bracket 1 and the magnetic plate, the relative fixation between the components is realized, and the accuracy of the spatial position of each component is ensured. Since the overall magnetic field net magnetization vector of the small magnetic resonance main magnetic field insert structure is upward during work, this will cause the magnetic plate to be subjected to an upward magnetic field force, in this case, the magnetic plate has the risk of flying out of the bracket 1. The existence of the long pin 7 can provide mechanical restraint to offset part or all of the tendency of the magnetic plate to separate from the bracket 1 due to the magnetic field force, thereby ensuring the stable position of the magnetic plate in the bracket 1 and preventing the magnetic plate from flying out, which can avoid problems such as magnetic field inhomogeneity, imaging quality degradation, and the like caused by unstable structure.

[0037] The working principle is as follows: the small magnetic resonance main magnetic field insert structure, the 348 Nd-Fe-B permanent magnets 4 inlaid in the main magnetic plate 2 are the core of the magnetic field generation, and the surface magnetic field strength of each Nd-Fe-B permanent magnet 4 reaches 5660 Gauss, which collectively builds a main magnetic field environment, making the main imaging area field strength reach 165 mT. The multiple magnetic blocks 5 with a volume of 12x12x12mm³ on the beam magnetic plate 3 are distributed according to a specific layout, with the center point of the innermost magnetic block 5 to the axis of the beam magnetic plate 3 being 45mm, and the outermost being 65mm. They cooperate with the Nd-Fe-B permanent magnets 4 of the main magnetic plate 2 to precisely adjust the direction and path of the main magnetic field, guide the main magnetic field to the desired area, and accurately control the beam path. The main magnetic plate 2 is arranged in the middle of the beam magnetic plate 3, and the main magnetic field generated thereby cooperates with the magnetic field generated by the magnetic blocks 5 on the beam magnetic plate 3. The magnetic blocks 5 are distributed around the main magnetic plate 2, effectively confining the magnetic field generated by the main magnetic plate 2 to a specific area, reducing magnetic field leakage, and improving magnetic field utilization efficiency, so that more magnetic field energy is concentrated in the main imaging area. At the same time, the middle position makes the distance between the main magnetic plate 2 and the magnetic blocks 5 relatively uniform, making the adjustment of the magnetic field by the magnetic blocks 5 to the main magnetic plate 2 more balanced, optimizing the magnetic field uniformity. The repulsion force between the main magnetic plate 2 and the beam magnetic plate 3 due to the same poles of the magnets generates a repulsion force, and the insert structure precisely controls it through unique design, making the magnetic field interaction between the magnetic plates more orderly and reducing unstable factors. The pre-pressing structure at both ends ensures stable contact of the magnets, resists strain generated by the structure during actual work, and reduces the loosening or separation of the magnets. The two ends of the insert structure are thickened to enhance the structural strength and better withstand external forces, ensuring long-term operation stability. Each group of main magnetic plates 2 inlaid with 36 Nd-Fe-B permanent magnets 4 and beam magnetic plates 3 inlaid with 26 magnetic blocks 5 make the magnetic field of the main imaging area more stable and uniform, avoiding imaging distortion and ensuring accurate and reliable imaging results.

[0038] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0039] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A small magnetic resonance main field insert piece structure, characterized in that Comprise: Supporting frame (1) for supporting the whole structure; Magnetic plate, the magnetic plate includes main magnetic plate (2) and bundle magnetic plate (3), the main magnetic plate (2) and bundle magnetic plate (3) jointly constitute the insert piece structure, the main magnetic plate (2) is inlaid with multiple Nd-Fe-B permanent magnets (4), the bundle magnetic plate (3) is inlaid with multiple magnetic blocks (5); The main magnetic plate (2) is arranged in the middle of the bundle magnetic plate (3).

2. A small magnetic resonance main field insert piece structure according to claim 1, characterized in that: The magnetic block (5) is 12x12x12mm³ in volume, and the surface magnetic field strength of the Nd-Fe-B permanent magnet (4) is 5660 Gauss.

3. A small magnetic resonance main field insert piece structure according to claim 2, characterized in that: The Nd-Fe-B permanent magnet (4) uses 348 blocks in the whole main magnetic field system, and the main imaging area field strength reaches 165mT.

4. A small magnetic resonance main field insert piece structure according to claim 1, characterized in that: Each group of the main magnetic plate (2) is inlaid with 36 Nd-Fe-B permanent magnets (4), and the bundle magnetic plate (3) is inlaid with 26 magnetic blocks (5). The distance from the center point of the magnetic block (5) in the innermost layer to the axis of the bundle magnetic plate (3) is 45mm, and the distance from the center point of the magnetic block (5) in the outermost layer to the axis of the bundle magnetic plate (3) is 65mm.

5. A small magnetic resonance main field insert piece structure according to claim 4, characterized in that: The supporting frame (1) and the top of the magnetic plate are provided with a control panel (6), the control panel (6) is provided with a reserved hole, and the reserved hole is provided with a long pin (7).

6. A small magnetic resonance main field insert piece structure according to claim 5, characterized in that: The insert piece structure precisely controls the repulsive force between the magnetic plates, and the two ends of the insert piece structure are thickened.

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