An automatic sample changer

Abstract

The utility model provides a kind of automatic sample changing device, the automatic sample changing device includes sample wheel module, for driving sample wheel drive module and for controlling control module of drive module;The drive module includes the base for supporting the sample wheel module and drive source, the base is connected with sample wheel module magnetic suction, the drive source is located inside base, for driving the autorotation of the sample wheel module;The control module includes reset detection piece on the base and for controlling the drive control piece of drive source, the drive control piece is connected with drive source and reset detection piece communication;The sample wheel module is formed with the initial position indicating element for the sensing of reset detection piece.This application described automatic sample changing device supports wheel disc quick replacement, automatic reset, meet the needs of high-throughput XAFS experimental platform in running efficiency, repeatability and diversified test task adaptation each aspect.

Description

Technical Field

[0001] This utility model belongs to the field of automatic sample processing technology and relates to an automatic sample changing device. Background Technology

[0002] In research fields such as materials, energy, and the environment, X-ray absorption spectroscopy (XAFS) is widely used for the precise analysis of microstructure and valence state information. With the increasing demand for high-throughput experiments, experimental platforms often need to automate the testing of hundreds of samples, placing higher demands on the efficiency, stability, and adaptability of automated sample changing devices.

[0003] Currently, the mainstream sample changing structures mainly include: linear displacement sample chambers, robotic arm loading and unloading systems, and rotary sample wheels. Among them, the sample wheel structure has been widely used in XAFS experimental stations due to its compact structure and controllable operating rhythm. However, existing sample wheel devices still have the following problems: ① Wheel replacement usually uses screws or bayonet fixing, which is cumbersome and has low loading and unloading efficiency, especially inconvenient to use under space-constrained conditions; ② After replacing the wheel, it is difficult to restore the consistency with the original angular reference position, causing fluctuations in sample positioning accuracy; ③ The control system is tightly coupled with the wheel structure, making it unable to quickly adapt to wheel structures with different numbers or arrangements of holes, resulting in poor scalability.

[0004] Therefore, there is an urgent need to provide an automatic sample wheel device that supports rapid wheel replacement and automatic reset, and has flexible software control and hardware structure compatibility, so as to meet the needs of high-throughput XAFS experimental platforms in terms of operating efficiency, repeatability, and adaptability to diverse testing tasks.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an automatic sample changing device to solve the problems of inconvenient wheel replacement, difficulty in unifying the reference position after wheel replacement leading to decreased accuracy, and inability to adapt to different wheel types in the prior art.

[0007] To achieve the above objectives, this utility model provides an automatic sample changing device, which includes a sample wheel module, a drive module for driving the sample wheel, and a control module for controlling the drive module. The drive module includes a base for supporting the sample wheel module and a drive source. The base is magnetically connected to the sample wheel module, and the drive source is located inside the base for driving the rotation of the sample wheel module. The control module includes a reset detection element located on the base and a drive control element for controlling the drive source. The drive control element is communicatively connected to the drive source and the reset detection element. The sample wheel module has an initial position indicator for the reset detection element to sense.

[0008] In one specific embodiment, the sample wheel module includes a sample wheel body, the mounting surface of which is provided with a plurality of first magnetic components; the base is provided with a plurality of second magnetic components that are matched and configured with the first magnetic components.

[0009] In one specific implementation, the reset detection element is a photoelectric sensor.

[0010] In a more specific embodiment, any of the first magnetic attraction components is fixedly connected to the sample wheel body by bolts.

[0011] In a more specific embodiment, the second magnetic component is fixedly connected to the base by bolts.

[0012] In a more specific embodiment, the sample wheel body is wheel-shaped and includes a transmission support part and a sample detection part near the edge in sequence from the center outwards. The first magnetic suction component is disposed on the transmission support part. The sample detection part has a plurality of sample holes for limiting the sample.

[0013] In a further embodiment, the thickness of the sample detection section is less than the thickness of the transmission support section.

[0014] In a further embodiment, the spacing between adjacent sample wells is consistent.

[0015] In a further embodiment, the sample detection unit and the transmission support unit are detachably connected.

[0016] In a further embodiment, a crosshair is marked around the location of the sample well.

[0017] In a further embodiment, the sample well is numbered around its well location.

[0018] In a further embodiment, the initial position indicator protrudes from the mounting surface and is columnar or needle-shaped.

[0019] In one specific embodiment, the base further includes a transmission connection portion, on which the second magnetic attraction component is disposed, and the transmission connection portion is transmissionally connected to the drive source to drive the sample wheel module to rotate.

[0020] In one specific implementation, the drive source is selected from one or more of stepper motors and torque motors.

[0021] In one specific implementation, the drive control unit includes a drive controller and a host computer, and the drive controller is communicatively connected to the host computer.

[0022] In one specific implementation, the drive controller is a Waynes VSMD133_010T motor controller.

[0023] In one specific implementation, the host computer is LabVIEW.

[0024] As described above, the automatic sample changing device of this utility model has the following beneficial effects:

[0025] 1) In the automatic sample changing device described in this application, the sample wheel body is magnetically connected to the base. The magnetic connection method makes the automatic sample changing device convenient to operate when changing the wheel, with high loading and unloading efficiency and no space limitation.

[0026] 2) In this application, the reset detection component enables the replacement of the wheel to restore consistency with the original angle reference position, thereby achieving high repeatability positioning accuracy. Attached Figure Description

[0027] Figure 1 The diagram shown is a three-dimensional structural schematic of the automatic sample changing device provided by this utility model.

[0028] Figure 2 The diagram shown is a cross-sectional view of the automatic sample changing device provided by this utility model.

[0029] Figure 3 The diagram shown is a front view of the automatic sample changing device provided by this utility model.

[0030] Figure 4 The diagram shown is a three-dimensional structural schematic of the transmission support part in the automatic sample changing device provided by this utility model.

[0031] Figure 5 The diagram shown is a three-dimensional structural schematic of the sample detection section in the automatic sample changing device provided by this utility model.

[0032] Explanation of reference numerals in the attached figures

[0033] 10 Sample wheel body, 11 First magnetic suction component, 12 Transmission support, 13 Sample detection part, 131 Sample hole, 14 Initial position indicator, 20 Base, 21 Second magnetic suction component, 22 Drive source, 221 Bearing, 23 Transmission connection part, 30 Reset detection component, 40 Drive control component. Detailed Implementation

[0034] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0035] Please see Figures 1-5 This application provides an automatic sample changing device. It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art; they are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, in this application, "lower" refers to the side closest to the grinding pad. Terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] See Figures 1-5This embodiment provides an automatic sample changing device, which includes a sample wheel module, a drive module for driving the sample wheel, and a control module for controlling the drive module. The drive module includes a base 20 for supporting the sample wheel module and a drive source 22. The base 20 is magnetically connected to the sample wheel module, and the drive source 22 is located inside the base 20 for driving the rotation of the sample wheel module. The control module includes a reset detection element 30 located on the base 20 and a drive control element 40 for controlling the drive source 22. The drive control element 40 is communicatively connected to the drive source 22 and the reset detection element 30. The sample wheel module has an initial position indicator 14 for the reset detection element 30 to sense. In the automatic sample changing device of this application, the magnetic connection between the sample wheel module and the base 20 makes the automatic sample changing device convenient to operate when changing the wheel, with high loading and unloading efficiency and no space limitations. The reset detection element 30 ensures that after changing the wheel, it can maintain consistency with the original angle reference position, thereby achieving stable positioning accuracy of the automatic sample changing device. The automatic sample changing device described in this application supports rapid disk replacement and automatic reset, and has the characteristics of flexible software control and hardware structure compatibility, meeting the needs of high-throughput XAFS experimental platforms in terms of operating efficiency, repeatability accuracy and adaptability to diverse test tasks.

[0038] In a specific embodiment, such as Figures 1-5 As shown, the sample wheel body 10 includes a plurality of first magnetic attraction components 11, and any one of the first magnetic attraction components 11 is fixedly connected to the sample wheel body 10 by bolts.

[0039] In a specific embodiment, such as Figures 1-5 As shown, the sample wheel module includes a sample wheel body 10, and the mounting surface of the sample wheel body 10 is provided with a plurality of first magnetic attraction components 11; the base 20 is provided with a plurality of second magnetic attraction components 21 that are matched with the first magnetic attraction components 11.

[0040] It should be noted that the type and size of the magnets used in the first magnetic attraction component 11 and the second magnetic attraction component 21 can be arbitrarily selected according to actual needs, as long as the base 20 and the sample wheel body 10 are stably connected during the experiment.

[0041] In a specific embodiment, such as Figures 1-5 As shown; the reset detection element 30 is a photoelectric sensor. When the initial position indicator 14 rotates to the position corresponding to the photoelectric sensor as the sample wheel body 10 rotates, the initial position indicator 14 blocks the light signal emitted by the photoelectric sensor, causing the photoelectric sensor to generate a reset signal and transmit it to the drive control element 40.

[0042] In a more specific embodiment, such as Figures 1-5As shown, any of the first magnetic suction components 11 is fixedly connected to the sample wheel body 10 by bolts.

[0043] In a more specific embodiment, such as Figures 1-5 As shown, the second magnetic attraction component 21 is fixedly connected to the base 20 by bolts.

[0044] In a more specific embodiment, such as Figures 1-5 As shown, the sample wheel body 10 is wheel-shaped and includes a transmission support part 12 and a sample detection part 13 near the edge from the center outwards. The first magnetic suction component 11 is disposed on the transmission support part 12. The sample detection part 13 has a plurality of sample holes 131 for limiting the sample.

[0045] In a further specific embodiment, such as Figures 1-5 As shown, the thickness of the sample detection section 13 is less than the thickness of the transmission support section 12. The smaller thickness of the sample detection section 13 reduces the impact of the sample detection section 13 itself on the XAFS experiment, thus reducing the light-blocking area and making it suitable for experimental conditions with tilted incident angles (e.g., 45°), thereby improving experimental accuracy. The larger thickness of the transmission support section 12 facilitates the stress distribution during disc replacement, making disc replacement convenient and preventing damage due to excessive thinness, thus improving the structural strength of the disc.

[0046] In a further specific embodiment, such as Figures 1-5 As shown, the spacing between adjacent sample wells 131 is consistent. Consistent spacing of sample wells 131 facilitates unified control during subsequent automatic sample changing.

[0047] In a further specific embodiment, such as Figures 1-5 As shown, the sample detection unit 13 and the transmission support unit 12 are detachably connected. This detachable connection can be achieved by the sample detection unit 13 and the transmission support unit 12 having corresponding threads at their assembly positions for a threaded connection; or by the sample detection unit 13 and the transmission support unit 12 having corresponding through holes for bolts to pass through for a nut-bolt connection; or by the sample detection unit 13 and the transmission support unit 12 having corresponding snap-fit ​​elements for a snap-fit ​​connection.

[0048] In a like Figures 1-5 In the specific embodiment shown, the sample detection unit 13 and the transmission support unit 12 are detachably connected by nuts and bolts.

[0049] In a further specific embodiment, such as Figures 1-5 As shown, crosshairs are marked around the sample hole 131. These crosshairs assist in the positioning and adhesion of the sample.

[0050] It should be noted that the size and shape of the sample wheel body 10 can be adjusted according to actual needs. For example, the shape of the sample wheel body 10 can be circular, rectangular, or elliptical, as long as the sample holes 131 are arranged with the rotation axis of the sample wheel body 10 as the center. If the number of samples is large, a larger sample wheel body 10 should be selected; otherwise, a smaller sample wheel body 10 should be selected. In a case such as Figures 1-5 In a specific embodiment, the cross-section of the sample wheel body 10 is circular.

[0051] In a more specific embodiment, such as Figures 1-5 As shown, the thickness of the support transmission part 12 is 3-10mm. For example, it can be 3-4mm, 4-5mm, 5-6mm, 6-7mm, 7-8mm, 8-9mm, or 9-10mm.

[0052] In a more specific embodiment, such as Figures 1-5 As shown, the thickness of the sample detection section 13 is 0.5–2 mm. For example, it can be 0.5–0.7 mm, 0.7–1 mm, 1–1.2 mm, 1.2–1.5 mm, 1.5–1.7 mm, or 1.7–2 mm.

[0053] It should be noted that the thickness and cross-sectional area of ​​the supporting transmission part 12 and the sample detection part 13 can be adjusted according to actual needs, as long as the sample detection part 13 is sufficient to form the sample hole 131. In a... Figures 1-5 In the specific embodiment shown, the thickness of the support transmission part 12 is 5 mm, and the thickness of the sample detection part 13 is 1.5 mm.

[0054] In a more specific embodiment, such as Figures 1-5 As shown, the number of sample wells 131 is 8 to 50. For example, it can be 8 to 12, 12 to 16, 16 to 20, 20 to 24, 24 to 26, 26 to 30, 30 to 40, or 40 to 50.

[0055] In a more specific embodiment, such as Figures 1-5 As shown, the diameter of the sample hole 131 is 5-30 mm. For example, it can be 5-10 mm, 10-15 mm, 15-20 mm, 20-25 mm, or 25-30 mm.

[0056] It should be noted that the number and diameter of the sample holes 131 can be adjusted according to actual needs. For example, when the number of samples is large, a sample wheel body 10 with more sample holes 131 should be selected; conversely, a sample wheel body 10 with more sample holes 131 should be selected when the number of samples is small. The number of sample holes 131 on the sample wheel can be 8-12, 12-16, 16-20, 20-24, 24-26, 26-30, or 30-40. The diameter of the sample holes 131 only needs to match the diameter of the sample container. In a... Figures 1-5 In a specific embodiment, the number of sample holes 131 is 26, the diameter of the sample holes 131 is 15mm, the spacing is 25mm, and they are numbered from 0 to 25. Hole position 0 is an empty sample position, and the initial position indicator 14 is located at the position corresponding to hole position 0.

[0057] The automatic sample changing device described in this application can be a metal automatic sample changing device, a plastic automatic sample changing device, or a ceramic automatic sample changing device. In a... Figures 1-5 In the specific embodiment shown, the automatic sample changing device is a metal automatic sample changing device.

[0058] In a specific embodiment, such as Figures 1-5 As shown, the base 20 also includes a transmission connection part 23, the second magnetic attraction component 21 is disposed on the transmission connection part 23, and the transmission connection part 23 is connected to the drive source 22 to drive the sample wheel module to rotate.

[0059] In a like Figures 1-5 In the specific embodiment shown, a bearing 221 is formed on the rotation output shaft of the drive source 22. The other end of the bearing 221 is connected to the transmission connection part 2 to drive the sample wheel module to rotate. The rotation of the drive source 22 drives the transmission connection part 23 to rotate through the bearing 221, which in turn drives the first magnetic attraction part 11 and the sample wheel module to rotate, which are magnetically connected to the second magnetic attraction part 21.

[0060] In a specific embodiment, such as Figures 1-5 As shown, the drive source 22 is selected from one or more of a stepper motor and a torque motor. In a... Figures 1-5 In the specific embodiment shown, the drive source 22 includes a stepper motor and a reducer connected by a drive mechanism, and the stepper motor has a microstepping control function. The drive source 22 has high precision to cooperate with the control module to achieve an angular positioning accuracy better than 0.1°.

[0061] In a specific embodiment, such as Figures 1-5 As shown, the drive control unit 40 is communicatively connected to the drive source 22 and the photoelectric sensor.

[0062] In a specific embodiment, such as Figures 1-5As shown, the initial position indicator 14 protrudes from the mounting surface and is columnar or needle-shaped. It should be noted that regardless of the size of the sample wheel body 10, the initial position indicator 14 is always formed on the sample wheel body 10 at the position corresponding to the reset detection element 30.

[0063] In a specific embodiment, such as Figures 1-3 As shown, the shape of the base 20 is selected from one or more of the following: cubic, cylindrical, frustum, and convex. It should be noted that the size and shape of the base 20 can be adjusted according to actual needs, as long as it can stably support the sample wheel module and ensure that the sample wheel body 10 is set perpendicular to the ground.

[0064] In a like Figures 1-3 In the specific embodiment shown, the base 20 includes a base parallel to the ground and a support portion protruding and perpendicular to the base, the support portion being used for magnetic connection with the sample wheel module.

[0065] In a specific embodiment, such as Figures 1-5 As shown, the drive control unit 40 includes a drive controller and a host computer, and the drive controller is communicatively connected to the host computer.

[0066] In a specific embodiment, such as Figures 1-5 As shown, the drive control unit 40 includes an input module, which includes a sample changing module for inputting sample changing commands. The sample changing module is communicatively connected to the control drive source 22 to control the drive source 22 to drive the sample wheel module to rotate to the specified test hole position. It also includes a setting module for inputting parameters of the sample wheel body 10 and the drive source 22. The setting module is communicatively connected to the sample changing module and the drive source 22 so that the built-in software program of the drive control unit 40 can calculate the corresponding angle of each hole position and feed back the calculated signal to the sample changing module to control the angle of rotation of the sample wheel module driven by the drive source 22.

[0067] In a specific embodiment, such as Figures 1-5 As shown, the sample change instructions include an automatic reset instruction (i.e., returning to well position 0), an instruction to select a sample at a specified well position, and an instruction to automatically change to the next well position sample.

[0068] In a specific embodiment, such as Figures 1-5 As shown, the parameters of the sample wheel body 10 and the drive source 22 include the number of sample holes 131, running speed, reduction ratio, and homing speed.

[0069] In a like Figures 1-5 In the specific embodiment shown, the drive controller and the host computer are connected via an RS485 to Ethernet interface.

[0070] In a like Figures 1-5 In the specific embodiment shown, the drive controller is a Waynes VSMD133_010T motor controller. It should be noted that the drive controller can be replaced with a functionally equivalent device according to actual needs.

[0071] In a like Figures 1-5 In the specific embodiment shown, the host computer is LabVIEW. It should be noted that the host computer can be replaced with a functionally equivalent device as needed, as long as it can support a graphical user interface, hole position parameter setting, automatic generation of sample change paths, and equipment status monitoring.

[0072] The drive control unit 40 can quickly adapt to different types of wheel structures by modifying configuration parameters (including the number of holes, initial angle, etc.). The system automatically updates the control logic to ensure the accuracy of the sample changing path and the compatibility of the wheel changing.

[0073] In a like Figures 1-5 In the specific embodiment shown, the operation process of the automatic sample changing device includes the following steps:

[0074] 1) Select a matching sample wheel body 10 according to the number and diameter of the samples. Through the matching of the first magnetic suction component 11 and the second magnetic suction component 21, the transmission support part 12 of the sample wheel body 10 is magnetically connected to the transmission connection part 23 of the base 20, thereby realizing the installation of the sample wheel module.

[0075] 2) By inputting instructions into the input module of the host computer, the drive controller is started to control the drive source to work, so that the sample wheel module rotates through the bearing 221 until the initial position indicator 14 rotates to the photoelectric sensor and blocks the light signal emitted by the photoelectric sensor; the photoelectric sensor sends a signal to reset to the 0th hole position to the host computer to determine the initial angle of reset (i.e. the angle of the empty sample hole numbered 0).

[0076] 3) Input the initial angle, the driving speed, and the diameter and number of the sample holes 131 of the selected sample wheel body 10 into the host computer through the setting window. The host computer program automatically calculates the angle corresponding to each numbered sample hole 131. According to the test requirements, input the command in the sample changing window to make the host computer output a rotation signal to the drive control component, control the drive source 22 to start and stop, until the sample wheel body 10 rotates to the corresponding angle, so as to align the sample hole 131 with the test location.

[0077] 4) When it is necessary to replace the sample wheel body 10, apply force to the transmission support part 12 to separate the sample wheel body 10 from the base 20; after replacement, repeat the above steps to set the upper computer parameters and test the sample.

[0078] In the above embodiments of this application, the automatic sample changing device enables rapid loading and unloading of the wheel, and the magnetic suction structure supports loading and unloading in seconds, significantly improving the efficiency of wheel changing and making it suitable for space-constrained platforms; it has high repeatability and positioning accuracy, and the reset detection component 30 can eliminate the error caused by wheel replacement, ensuring the consistency of sample positioning after wheel replacement, with a repeatability error better than 0.1°; the drive control component 40 is flexible: it can adapt to different wheel structures without program modification, supports custom or batch angle settings, multiple drive modes, and drive parameter configuration; the wheel can be freely replaced with different apertures, densities, and sizes to adapt to various experimental needs; it has strong compatibility and portability, and the wheel can be replaced without changing the control system and main structure, making it suitable for different experimental space conditions and high-throughput application platforms.

[0079] This invention effectively overcomes some shortcomings of the prior art and has high industrial application value.

[0080] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An automatic sample changing device, characterized in that, The automatic sample changing device includes a sample wheel module, a drive module for driving the sample wheel, and a control module for controlling the drive module. The driving module includes a base (20) for supporting the sample wheel module and a driving source (22). The base (20) is magnetically connected to the sample wheel module, and the driving source (22) is located inside the base (20) for driving the rotation of the sample wheel module. The control module includes a reset detection element (30) disposed on the base (20) and a drive control element (40) for controlling the drive source (22), wherein the drive control element (40) is communicatively connected to the drive source (22) and the reset detection element (30); The sample wheel module is provided with an initial position indicator (14) for sensing by the reset detection element (30).

2. The automatic sample changing device according to claim 1, characterized in that, The sample wheel module includes a sample wheel body (10), and the mounting surface of the sample wheel body (10) is provided with a plurality of first magnetic attraction components (11); The base (20) is provided with a plurality of second magnetic components (21) that are matched with the first magnetic component (11); And / or, the reset detection element (30) is a photoelectric sensor.

3. The automatic sample changing device according to claim 2, characterized in that, Any of the first magnetic attraction components (11) is bolted to the sample wheel body (10); and / or, the second magnetic attraction component (21) is bolted to the base (20).

4. The automatic sample changing device according to claim 2, characterized in that, The sample wheel body (10) is wheel-shaped and includes a transmission support part (12) and a sample detection part (13) near the edge from the center outward. The first magnetic suction component (11) is provided on the transmission support part (12). The sample detection part (13) has a plurality of sample holes (131) for limiting the sample.

5. The automatic sample changing device according to claim 4, characterized in that, The thickness of the sample detection part (13) is less than the thickness of the transmission support part (12); And / or, the spacing between adjacent sample wells (131) is consistent; And / or, the sample detection unit (13) and the transmission support unit (12) are detachably connected; And / or, cross lines are marked around the hole position of the sample hole (131); And / or, the sample hole (131) is numbered around the hole position; And / or, the initial position indicator (14) protrudes from the assembly surface and is columnar or needle-shaped.

6. The automatic sample changing device according to claim 4, characterized in that, The number of sample wells (131) is 8 to 50; And / or, the diameter of the sample hole (131) is 5 to 30 mm.

7. The automatic sample changing device according to claim 5, characterized in that, The thickness of the support transmission part (12) is 3 to 10 mm; And / or, the thickness of the sample detection section (13) is 0.5 to 2 mm.

8. The automatic sample changing device according to claim 1, characterized in that, The base (20) also includes a transmission connection part (23), and the second magnetic attraction component (21) is disposed on the transmission connection part (23). The transmission connection part (23) is connected to the drive source (22) to drive the sample wheel module to rotate.

9. The automatic sample changing device according to claim 1, characterized in that, The drive source (22) is selected from one or more of stepper motors and torque motors.

10. The automatic sample changing device according to claim 1, characterized in that, The drive control unit (40) includes a drive controller and a host computer, and the drive controller is communicatively connected to the host computer.

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