A sliding rail type double magnetic pole interval nuclear magnetic detection device

Abstract

The utility model provides a slide rail formula double magnetic pole distance nuclear magnetic detection device, the design double track linkage precision distance adjustment: through slide rail screw synchronous mechanism realizes double magnetic pole equidistance reverse movement, dynamic keeps magnetic field center symmetry, online closed loop calibration system: integration hall sensor network, real -time feedback magnetic field intensity and automatic compensation offset, it includes: detection bin, the bottom of detection bin is provided with four support legs, the front of detection bin is equipped with the bin lid through the hinge rotation and is installed, is provided with the observation window on the bin lid, the top fixed mounting of detection bin has the working pilot lamp, the outside electric connection of detection bin has the computer controller, be provided with the metal shielding layer on the inner wall of detection bin, two electric slide rail mechanisms, symmetry sets up inside detection bin, two electric slide rail mechanisms all are installed nuclear magnetic detection mechanism, two slide platform, symmetry sets up in the bottom inner wall of detection bin, two slide platform are located between two electric slide rail mechanisms.

Description

Technical Field

[0001] This utility model relates to the field of nuclear magnetic resonance (NMR) detection device technology, and in particular to a sliding rail type dual magnetic pole spacing NMR detection device. Background Technology

[0002] Nuclear magnetic resonance (NMR) technology, as a core method for material analysis, is widely used in fields such as medical imaging and materials science. Permanent magnet NMR devices, due to their advantage of not requiring liquid helium cooling, have become an ideal choice for rapid on-site detection.

[0003] Current technologies have a fixed magnetic pole spacing, which cannot be adapted to samples of different thicknesses (such as living organs / thin-layer materials), thus limiting detection accuracy. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention solves the following technical problem: existing technologies have a fixed magnetic pole spacing, which cannot be adapted to samples of different thicknesses (such as living organs / thin-layer materials), thus limiting detection accuracy. This invention provides a sliding rail type dual magnetic pole spacing NMR detection device.

[0005] To achieve the above objectives, this utility model provides:

[0006] A sliding rail type dual-pole spacing NMR detection device includes:

[0007] The testing chamber has four support legs at its bottom, a cover that is hinged to the front of the testing chamber and has an observation window on the cover, a working indicator light fixedly installed on the top of the testing chamber, a computer controller electrically connected to the outside of the testing chamber, and a metal shielding layer on the inner wall of the testing chamber.

[0008] Two electric slide rail mechanisms are symmetrically arranged inside the detection chamber, and each of the two electric slide rail mechanisms is equipped with an NMR detection mechanism.

[0009] Two sliding platforms are symmetrically arranged on the bottom inner wall of the detection chamber. The two sliding platforms are located between two electric sliding rail mechanisms. The top of the two sliding platforms is equipped with the same base, and the same sample detection chamber is placed on the top of the base.

[0010] Preferably, the electric slide rail mechanism includes a slide rail, which is installed on the bottom inner wall of the detection chamber. A lead screw is rotatably installed inside the slide rail via a bearing. A stepper motor is installed on the outside of the slide rail. The output shaft of the stepper motor is fixedly installed with the lead screw. The two stepper motors are synchronously connected to a control system to achieve synchronous operation.

[0011] Preferably, the NMR detection mechanism includes an NMR detection plate, a movable rod is fixedly installed at the bottom of the NMR detection plate, the movable rod is slidably installed in a slide rail, the movable rod is threaded to the outside of a lead screw, a limit slide rod is fixedly installed in the slide rail, the movable rod is slidably installed on the outside of the limit slide rod, and the limit slide rod ensures that the movable rod slides stably in the slide rail.

[0012] Preferably, two first Hall sensors are fixedly installed on the rear side of the moving rod, and a groove is provided on the rear side of the moving rod. A magnetic pole assembly is provided in the groove, and the magnetic pole assembly includes neodymium iron boron and copper wire winding.

[0013] Preferably, a working indicator light and a second Hall sensor are embedded in the top of the base.

[0014] Preferably, the bottom of the sample testing chamber is fixedly installed with four positioning pins, and the top of the base is provided with four positioning slots. The four positioning pins are adapted to the four positioning slots. The front of the base is fixedly installed with a handle. The four positioning pins cooperate with the four positioning slots to facilitate the installation and disassembly of the sample testing chamber.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] 1. Dual-pole synchronous precision pitch adjustment system

[0017] The symmetrical electric slide rail mechanism (including lead screw and limit slide bar) is synchronously driven by two stepper motors through the same control system.

[0018] It enables equidistant, counter-directional movement of dual magnetic poles (the spacing adjustment range is customizable), solving the problem of magnetic field center offset caused by traditional unilateral spacing adjustment.

[0019] 2. Integrated Magnetism-Electromagnetism Detection Module

[0020] The moving rod integrates a first Hall sensor (dynamically monitoring the magnetic pole position). The magnetic pole assembly adopts a composite structure of neodymium iron boron and copper wire winding (permanent magnet + electromagnetic dual mode). The magnetic pole assembly is embedded in a groove to form a compact magnetic field generator. The copper wire winding realizes field strength adjustment (adjustable from 0.5-1.2T), and neodymium iron boron provides the basic field strength.

[0021] 3. Three-level closed-loop magnetic field monitoring network, sensor layout: real-time feedback of magnetic pole spacing and parallelism, full-area scanning of magnetic field uniformity in the sample area, fusion of 16-point sensor data → generation of 3D magnetic field cloud map, automatic triggering of PID compensation.

[0022] 4. Modular quick-release sample compartment, positioning pins + positioning grooves, sliding table support base → enabling one-click push-pull sample changing.

[0023] This utility model features a dual-track linkage precision distance adjustment system: it achieves equidistant reverse movement of the two magnetic poles through a sliding rail and lead screw synchronization mechanism, dynamically maintaining the symmetry of the magnetic field center; and an online closed-loop calibration system: it integrates a Hall sensor network to provide real-time feedback on the magnetic field strength and automatically compensate for offset. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of this design;

[0025] Figure 2 For this design Figure 1 A schematic diagram of the cross-sectional structure;

[0026] Figure 3 This is a top view of the base, electric slide rail mechanism, and nuclear magnetic resonance detection mechanism in this design.

[0027] Figure 4 This is a schematic diagram of the NMR detection mechanism in this design;

[0028] Figure 5 This is a schematic diagram of the sample testing chamber in this design.

[0029] In the diagram: 1. Detection chamber; 11. Metal shielding layer; 12. Working indicator light; 13. Chamber cover; 14. Observation window; 2. Computer controller; 3. Electric slide rail mechanism; 31. Slide rail; 32. Stepper motor; 33. Limiting slide rod; 34. Lead screw; 4. NMR detection mechanism; 41. Moving rod; 42. NMR detection plate; 43. Groove; 44. Magnetic pole assembly; 45. First Hall sensor; 5. Slide stage; 6. Base; 61. Positioning groove; 62. Second Hall sensor; 7. Sample detection chamber; 71. Positioning pin. Detailed Implementation

[0030] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0031] See Figure 1-5 As shown, a sliding rail type dual-pole spacing NMR detection device includes a detection chamber 1, two electric sliding rail mechanisms 3, and two sliding tables 5. The bottom of the detection chamber 1 is provided with four support legs. The front of the detection chamber 1 is rotatably mounted with a chamber cover 13 via a hinge. The chamber cover 13 is provided with an observation window 14. The top of the detection chamber 1 is fixedly mounted with a working indicator light 12. The outside of the detection chamber 1 is electrically connected to a computer controller 2. The inner wall of the detection chamber 1 is provided with a metal shielding layer 11. The two electric sliding rail mechanisms 3 are symmetrically arranged inside the detection chamber 1. Each of the two electric sliding rail mechanisms 3 is equipped with an NMR detection mechanism 4. The two sliding tables 5 are symmetrically arranged on the bottom inner wall of the detection chamber 1. The two sliding tables 5 are located between the two electric sliding rail mechanisms 3. The top of the two sliding tables 5 is mounted with the same base 6. The top of the base 6 is placed with the same sample detection chamber 7.

[0032] In this embodiment, the electric slide rail mechanism 3 includes a slide rail 31, which is installed on the bottom inner wall of the detection chamber 1. A lead screw 34 is rotatably installed inside the slide rail 31 through a bearing. A stepper motor 32 is installed on the outside of the slide rail 31. The output shaft of the stepper motor 32 is fixedly installed with the lead screw 34. The two stepper motors 32 are synchronously connected to a control system to achieve synchronous operation.

[0033] In this embodiment, the nuclear magnetic resonance (NMR) detection mechanism 4 includes an NMR detection plate 42. A movable rod 41 is fixedly installed at the bottom of the NMR detection plate 42. The movable rod 41 is slidably installed in the slide rail 31. The movable rod 41 is threaded to the outside of the lead screw 34. A limiting slide rod 33 is fixedly installed in the slide rail 31. The movable rod 41 is slidably installed on the outside of the limiting slide rod 33. The limiting slide rod 33 ensures that the movable rod 41 slides stably in the slide rail 31.

[0034] In this embodiment, two first Hall sensors 45 are fixedly installed on the rear side of the moving rod 41, and a groove 43 is provided on the rear side of the moving rod 41. A magnetic pole assembly 44 is provided in the groove 43, and the magnetic pole assembly 44 includes neodymium iron boron and copper wire winding.

[0035] Specifically, the magnetic pole assembly:

[0036] Main magnet: Neodymium iron boron N52 (1.5T), 100mm in diameter

[0037] Correction coil: copper wire winding (embedded in the groove of the magnetic pole back plate), with a power-on / off response time of <1ms.

[0038] In this embodiment, the top of the base 6 is embedded with 12 working indicator lights and 62 second Hall sensors.

[0039] Specifically, the sensor is fully embedded (the surface is flush with the base) to avoid interfering with the sample;

[0040] The magnetic pole back sensor is insulated from heat conduction by ceramic heat-conducting pillars (operating temperature drift ≤0.01%).

[0041] In this embodiment, four positioning pins 71 are fixedly installed at the bottom of the sample detection chamber 7, and four positioning slots 61 are opened at the top of the base 6. The four positioning pins 71 are adapted to the four positioning slots 61. A handle is fixedly installed on the front of the base 6. The four positioning pins 71 cooperate with the four positioning slots 61 to facilitate the installation and disassembly of the sample detection chamber 7.

[0042] Operating Procedure: When in use, connect the power supply and computer controller 2, place the object to be detected inside the sample detection chamber 7, and then move the base 6 along the two slides 5 using the handle to move the sample detection chamber 7 between the two NMR detection mechanisms 4. The two magnetic pole components 44 are energized to generate a magnetic field, performing NMR detection on the object. This is combined with four first Hall sensors 45 and twelve second Hall sensors 62 to detect the magnetic field strength. The Hall sensors detect the magnetic field strength distribution and generate a 3D field strength cloud map. To accommodate objects of different sizes, adjust the distance between the two NMR detection mechanisms 4. The stepper motor 32 drives the lead screw 34 to rotate, which in turn drives the moving rod 41 to slide within the slide rail 31. The moving rod 41 then moves the NMR detection plate 42. By changing the distance between the two NMR detection plates 42, NMR detection of objects of different sizes can be adapted.

[0043] This utility model is not limited to the above-described preferred embodiment. Anyone can derive other products in various forms under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that is the same as or similar to this utility model is within its protection scope.

Claims

1. A sliding rail type dual-pole spacing NMR detection device, characterized in that: include: The detection chamber (1) has four support legs at its bottom. The front of the detection chamber (1) is fitted with a cover (13) by a hinge. The cover (13) has an observation window (14). The top of the detection chamber (1) is fixedly fitted with a work indicator light (12). The outside of the detection chamber (1) is electrically connected to a computer controller (2). Two electric slide rail mechanisms (3) are symmetrically arranged inside the detection chamber (1), and nuclear magnetic detection mechanisms (4) are installed on both electric slide rail mechanisms (3); Two slides (5) are symmetrically arranged on the bottom inner wall of the detection chamber (1). The two slides (5) are located between two electric slide rail mechanisms (3). The top of the two slides (5) is equipped with the same base (6), and the top of the base (6) is equipped with the same sample detection chamber (7).

2. The sliding rail type dual-pole spacing NMR detection device according to claim 1, characterized in that: The electric slide rail mechanism (3) includes a slide rail (31), which is installed on the bottom inner wall of the detection chamber (1). A lead screw (34) is rotatably installed in the slide rail (31) through a bearing. A stepper motor (32) is installed on the outside of the slide rail (31), and the output shaft of the stepper motor (32) is fixedly installed with the lead screw (34).

3. The sliding rail type dual-pole spacing NMR detection device according to claim 1, characterized in that: The nuclear magnetic resonance (NMR) detection mechanism (4) includes an NMR detection plate (42), a movable rod (41) is fixedly installed at the bottom of the NMR detection plate (42), the movable rod (41) is slidably installed in the slide rail (31), the movable rod (41) is threadedly connected to the outside of the lead screw (34), a limit slide rod (33) is fixedly installed in the slide rail (31), and the movable rod (41) is slidably installed on the outside of the limit slide rod (33).

4. The sliding rail type dual-pole spacing NMR detection device according to claim 3, characterized in that: Two first Hall sensors (45) are fixedly installed on the rear side of the moving rod (41). A groove (43) is provided on the rear side of the moving rod (41). A magnetic pole assembly (44) is provided in the groove (43). The magnetic pole assembly (44) includes neodymium iron boron and copper wire winding.

5. The sliding rail type dual-pole spacing NMR detection device according to claim 1, characterized in that: The base (6) has a working indicator light (12) and a second Hall sensor (62) embedded in its top.

6. The sliding rail type dual-pole spacing NMR detection device according to claim 1, characterized in that: The bottom of the sample testing chamber (7) is fixedly installed with four positioning pins (71), and the top of the base (6) is provided with four positioning slots (61). The four positioning pins (71) are adapted to the four positioning slots (61), and a handle is fixedly installed on the front of the base (6).

7. The sliding rail type dual-pole spacing NMR detection device according to claim 1, characterized in that: A metal shielding layer (11) is provided on the inner wall of the detection chamber (1).

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