An automatic sample injector for near infrared diffuse reflectance detection

Abstract

The utility model relates to the technical field of grain and oil inspection, provide a kind of for near infrared diffuse reflection detection's automatic sampling device, comprising: rotating work subassembly, including rotating workbench and first driving device, rotating workbench is with several detection positions along the circumferential arrangement, first driving device is transmission connection with rotating workbench, for driving rotating workbench to make rotating movement, so that each detection position is in turn aligned fixedly set detection station;Several sample rotating subassemblies, corresponding with the number of detection positions and one-to-one fixedly set in each detection position, each sample rotating subassembly includes rotating main body and second driving device, rotating main body is used to carry the sample to be measured, and second driving device is used to drive rotating main body to rotate around its own axis;Wherein, when any detection position rotates to detection station, the rotating main body at this detection position rotates and cooperates to realize diffuse reflection detection.

Description

Technical Field

[0001] This utility model relates to the field of grain and oil inspection technology, and in particular to an automatic sample introduction device for near-infrared diffuse reflectance detection. Background Technology

[0002] Near-infrared spectroscopy (NIR) technology is widely used in the detection of agricultural products, pharmaceuticals, and chemical products due to its advantages such as speed and non-destructive testing. Near-infrared light (NIR), an electromagnetic wave with a wavelength range of 780–2526 nm, has spectral characteristics primarily derived from the overtone and combination frequency absorption of hydrogen-containing molecular vibrations. It can accurately reflect the composition and structure of substances through differences in characteristic absorption peaks. Currently, commonly used near-infrared diffuse reflectance detection equipment in laboratories generally adopts a single-sample-stage design, which has significant limitations in practical applications: Firstly, it can only process one sample at a time, requiring sequential sample loading, detection, and cleaning, with an average processing time of up to 3 minutes per sample, including only 30 seconds for spectral scanning, resulting in a significant amount of time wasted on manual operation. Secondly, this serial detection mode cannot achieve batch sample processing; when encountering urgent samples, the current detection process must be interrupted, severely impacting detection efficiency. The inefficiency of existing equipment is particularly pronounced in scenarios requiring high-throughput analysis, such as agricultural product quality testing and pharmaceutical process monitoring. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the related art. To this end, this application proposes an automated sample introduction device for near-infrared diffuse reflectance detection, which addresses the inefficiency of existing equipment. The automated sample introduction device for near-infrared diffuse reflectance detection has the advantages of multiple detection positions and a high degree of automation, meeting the laboratory's requirements for flexibility in the detection process.

[0004] An automated sample introduction device for near-infrared diffuse reflectance detection according to an embodiment of this application includes: A rotating working assembly includes a rotating worktable and a first driving device. The rotating worktable has several detection positions arranged circumferentially. The first driving device is connected to the rotating worktable for driving the rotating worktable to rotate, so that each detection position is sequentially aligned with a fixed detection station. Several sample rotation components are fixedly installed at each detection position, corresponding to the number of detection positions. Each sample rotation component includes a rotation body and a second driving device. The rotation body is used to carry the sample to be tested, and the second driving device is used to drive the rotation body to rotate around its own axis. Specifically, when any detection position is rotated to the detection station, the rotating main body at that detection position rotates in coordination to achieve diffuse reflection detection.

[0005] The automatic sample introduction device for near-infrared diffuse reflectance detection according to the embodiments of this application is lightweight, easy to install, and simple to operate. It can achieve batch detection when there are many samples to be tested, and can add samples at any time to improve the overall detection efficiency.

[0006] According to one embodiment of this application, the number of detection positions of the rotary table is 6-24.

[0007] According to one embodiment of this application, the first driving device is a stepper motor or a servo motor, and the first driving device is connected to the rotary table via a worm gear mechanism or a gear set.

[0008] According to one embodiment of this application, the rotating body includes: The sample support stage has a groove on the top for positioning the sample container, and the surface of the sample support stage is coated with an anti-reflective coating.

[0009] According to one embodiment of this application, the inner wall of the groove is provided with an elastic positioning element.

[0010] According to one embodiment of this application, the rotating body is a transmission gear, and the output shaft of the second drive device is provided with a drive gear, the drive gear meshing with the transmission gear.

[0011] According to one embodiment of this application, the second drive device is a DC geared motor with an adjustable speed range of 10-60 rpm.

[0012] According to one embodiment of this application, the rotary worktable is an aluminum alloy worktable, and the surface of the rotary worktable is anodized.

[0013] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the automatic sample introduction device and detection device for near-infrared diffuse reflectance detection provided in the embodiments of this application.

[0016] Figure 2This is a schematic diagram of the structure of the automatic sample introduction device for near-infrared diffuse reflectance detection provided in the embodiments of this application.

[0017] Figure 3 This is a schematic diagram of the structure of the automatic sample introduction device and detection device for near-infrared diffuse reflectance detection provided in the embodiments of this application.

[0018] Figure 4 This is a schematic diagram of the structure of the automatic sample introduction device and detection device for near-infrared diffuse reflectance detection provided in the embodiments of this application.

[0019] Figure 5 This is one of the structural schematic diagrams of the rotary table provided in the embodiments of this application.

[0020] Figure 6 This is the second schematic diagram of the structure of the rotary table provided in the embodiments of this application.

[0021] Figure 7 This is one of the structural schematic diagrams of the rotating body provided in the embodiments of this application.

[0022] Figure 8 This is the second structural schematic diagram of the rotating body provided in the embodiments of this application.

[0023] Figure 9 This is one of the structural schematic diagrams of the drive base provided in the embodiments of this application.

[0024] Figure 10 This is the second schematic diagram of the drive base provided in the embodiments of this application.

[0025] Figure 11 This is the third schematic diagram of the drive base provided in the embodiments of this application.

[0026] Figure 12 This is one of the structural schematic diagrams of the second driving device provided in the embodiments of this application.

[0027] Figure 13 This is the second schematic diagram of the structure of the second driving device provided in the embodiments of this application.

[0028] Figure 14 This is the third schematic diagram of the structure of the second driving device provided in the embodiments of this application.

[0029] Figure 15 This is one of the structural schematic diagrams of the drive gear provided in the embodiments of this application.

[0030] Figure 16 This is the second schematic diagram of the structure of the drive gear provided in the embodiments of this application.

[0031] Figure label: 1. Detection device; 2. Rotating working assembly; 3. Sample rotating assembly; 4. Sample container; 5. Rotating main body; 6. Drive base; 7. Second drive device; 8. Drive gear. Detailed Implementation

[0032] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0033] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections, wherein a fixed connection can include an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0035] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] The following is combined with Figures 1-16 This invention describes an automatic sample introduction device for near-infrared diffuse reflectance detection (hereinafter referred to as the automatic sample introduction device).

[0038] Please refer to the automated sample introduction device for near-infrared diffuse reflectance detection proposed in the embodiments of this application. Figures 1 to 4 The automatic sampler includes: The rotating work assembly 2 includes a rotating worktable and a first drive device. The rotating worktable has several detection positions arranged circumferentially. The first drive device is connected to the rotating worktable for driving the rotating worktable to rotate, so that each detection position is sequentially aligned with the fixed detection station. Several sample rotation components 3 are fixedly installed at each detection position, corresponding to the number of detection positions. Each sample rotation component 3 includes a rotating body 5 and a second driving device 7. The rotating body 5 is used to carry the sample to be tested, and the second driving device 7 is used to drive the rotating body 5 to rotate around its own axis. When any detection position is rotated to the detection station, the rotating body 5 at that detection position rotates to achieve diffuse reflection detection.

[0039] The automatic sample introduction device for near-infrared diffuse reflectance detection according to the embodiments of this application is lightweight, easy to install, and simple to operate. It can achieve batch detection when there are many samples to be tested, and can add samples at any time to improve the overall detection efficiency.

[0040] Understandably, the rotary table is circular, with several detection positions evenly arranged circumferentially, providing dedicated space for the sample to be tested. A first drive unit is connected to the rotary table via a transmission connection (such as gear or belt drive). When the first drive unit is activated, it drives the rotary table to rotate according to a set speed and direction. This rotational motion ensures that each detection position is sequentially and accurately aligned with the fixed detection station. The detection station is a critical area for near-infrared diffuse reflectance detection. The automatic sample feeding device of this application can cooperate with the detection device 1 to detect the fixed positions of the detection station.

[0041] It should be noted that the detection device 1 and the automatic sample injection device of this application are supporting equipment, and can be replaced according to the actual situation. In some possible embodiments, the detection device 1 is a Fourier type near-infrared spectrometer.

[0042] Several sample rotation components 3 are fixedly installed at each detection position, corresponding to the number of detection positions. Each sample rotation component 3 includes a rotating body 5 and a second driving device 7. The rotating body 5 directly supports the sample to be tested; its shape and size are designed according to the characteristics of the sample to ensure that the sample can be stably placed on it. The second driving device 7 provides power to the rotating body 5, enabling it to rotate around its own axis. When any detection position rotates to the detection station, the second driving device 7 at that detection position is activated, driving the rotating body 5 to rotate around its own axis. During rotation, near-infrared light irradiates the sample surface from different angles, and the diffuse reflected light from the sample surface is received by the detector at the detection station. Because the sample rotates continuously during the detection process, near-infrared light can irradiate the sample from all directions, avoiding detection errors caused by local differences in the characteristics of the sample surface, and improving the accuracy and comprehensiveness of the detection.

[0043] The automatic sample introduction device of this application is simple to operate. The operator only needs to place the sample to be tested on the rotating body 5 and start the first and second drive devices 7. The device can then automatically complete the sample introduction and detection process, reducing the difficulty of operation and the skill requirements for operators. When there are many samples to be tested, the device can achieve batch testing, and samples can be added at any time. Since the rotating worktable has multiple detection positions that can be reused, multiple samples can be placed for testing simultaneously, greatly improving detection efficiency. Furthermore, if additional samples are needed during the testing process, simply place the sample in an empty detection position and wait for the rotating worktable to move it to the detection station; there is no need to stop the entire testing process, further improving overall detection efficiency.

[0044] According to one embodiment of this application, the number of detection positions of the rotary table is 6-24.

[0045] The sample container 4 can be placed on the rotating body 5 of this application. The sample container 4 can be a sample cup. In one embodiment, the number of detection positions is 8. When performing multi-sample detection, it is only necessary to load the sample into the sample cup after installing the near-infrared detection requirements, and then place it into cup holders numbered 1 to 8 in sequence.

[0046] According to one embodiment of this application, the first driving device is a stepper motor or a servo motor, and the first driving device is connected to the rotary table via a worm gear mechanism or a gear set.

[0047] According to one embodiment of this application, the rotary table is a standard FL-D300 rotary platform. Its overall dimensions are 330mm (length) × 300mm (width) × 160mm (height), featuring a compact structure and lightweight design. The device is powered by a standard 220V voltage and has a maximum load capacity of 30kg, meeting the needs of routine laboratory testing. The core drive system uses a 57-76 series high-precision stepper motor, coupled with a 1:10 speed ratio reducer transmission mechanism, ensuring both accurate rotational positioning and sufficient torque output. Through optimized mechanical structure design, the entire system achieves a significant improvement in testing efficiency while ensuring operational stability, making it particularly suitable for near-infrared diffuse reflectance analysis scenarios requiring high-throughput testing. The dimensions of the rotary platform in this embodiment can be referenced... Figure 5 and Figure 6 .

[0048] According to one embodiment of this application, the rotating body 5 includes a sample support stage, with a groove on the top for positioning the sample container 4, and an anti-reflective coating on the surface of the sample support stage.

[0049] The top of the sample support stage features a carefully designed groove for positioning the sample container 4. This groove is not arbitrarily designed but precisely planned and manufactured based on the common shape of the sample container 4. For example, if the sample container 4 is cylindrical, the groove is designed to be a matching cylinder, with its diameter and depth precisely calculated to ensure that the sample container 4 can be tightly and accurately embedded within it. In this way, during the rotation of the main body 5 around its own axis for testing, the sample container 4 remains stable due to the positioning effect of the groove, preventing any shaking or displacement. At the same time, the groove design also greatly facilitates the operation. When placing and removing the sample container 4, the operator only needs to align the sample container 4 with the groove and gently insert or remove it, eliminating the need to spend a lot of time adjusting the position of the sample container 4, improving operational efficiency and reducing human interference in the testing process.

[0050] The sample stage surface is also coated with an anti-reflection coating. In near-infrared diffuse reflectance detection optical systems, the sample stage surface acts as a "light reflection source." When near-infrared light shines on the sample stage surface, some of the light is reflected back. This reflected light may interfere with the effective signal reflected back from the sample surface. The anti-reflection coating allows most of the light to penetrate the coating and reach the sample. As a result, the diffuse reflected light signal received by the detector from the sample is stronger, and the signal-to-noise ratio of the detection is significantly improved.

[0051] According to one embodiment of this application, the inner wall of the groove is provided with an elastic positioning element.

[0052] Understandably, when sample container 4 is placed into the groove, the elastic positioning elements immediately come into play. They automatically adjust their shape according to the shape and size of sample container 4, tightly fitting the surface of sample container 4. This tight fit not only eliminates the tiny gaps between sample container 4 and the inner wall of the groove, preventing sample container 4 from shaking in the groove, but also ensures that sample container 4 is accurately positioned in the center of the groove.

[0053] According to one embodiment of this application, the rotating body 5 is a transmission gear, and the output shaft of the second drive device 7 is provided with a drive gear 8, which meshes with the transmission gear.

[0054] The dimensions of the rotating body 5 in this embodiment can be referenced. Figure 7 and Figure 8 The dimensions of the drive gear 8 in this embodiment can be referenced. Figure 15 and Figure 16 .

[0055] According to one embodiment of this application, the sample rotation assembly 3 includes a drive base 6, a second drive device 7 is mounted on the drive base 6, and the drive base 6 is connected to a rotary table.

[0056] The dimensions of the rotating body 5 in this embodiment can be referenced. Figures 9 to 11 .

[0057] According to one embodiment of this application, the second drive device 7 is a DC geared motor with an adjustable speed range of 10-60 rpm.

[0058] The dimensions of the second driving device 7 in this embodiment can be referenced. Figures 12 to 14 .

[0059] According to one embodiment of this application, the rotary table is an aluminum alloy table, and the surface of the rotary table has been anodized.

[0060] The automatic sample feeding device provided by this invention can work in conjunction with near-infrared detection software. By setting the sample information corresponding to each detection position on the detection interface, the system can perform sample detection sequentially according to the sample information. The system can also automatically skip positions without sample information (sampling positions). The positioning is flexible. The system fills in the sample information at the corresponding positions where samples are placed. If no samples are placed, the information is left blank, and the system automatically skips the position.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automated sample introduction device for near-infrared diffuse reflectance detection, characterized in that, include: A rotating working assembly includes a rotating worktable and a first driving device. The rotating worktable has several detection positions arranged circumferentially. The first driving device is connected to the rotating worktable for driving the rotating worktable to rotate, so that each detection position is sequentially aligned with a fixed detection station. Several sample rotation components are fixedly installed at each detection position, corresponding to the number of detection positions. Each sample rotation component includes a rotation body and a second driving device. The rotation body is used to carry the sample to be tested, and the second driving device is used to drive the rotation body to rotate around its own axis. Specifically, when any detection position is rotated to the detection station, the rotating main body at that detection position rotates in coordination to achieve diffuse reflection detection.

2. The automatic sample introduction device for near-infrared diffuse reflectance detection according to claim 1, characterized in that, The number of detection positions of the rotary table is 6-24.

3. The automatic sample introduction device for near-infrared diffuse reflectance detection according to claim 1, characterized in that, The first driving device is a stepper motor or a servo motor, and the first driving device is connected to the rotary table through a worm gear mechanism or a gear set.

4. The automated sample introduction device for near-infrared diffuse reflectance detection according to claim 1, characterized in that, The rotating body includes: The sample support stage has a groove on the top for positioning the sample container, and the surface of the sample support stage is coated with an anti-reflective coating.

5. The automated sample introduction device for near-infrared diffuse reflectance detection according to claim 4, characterized in that, The inner wall of the groove is provided with an elastic positioning element.

6. The automatic sample introduction device for near-infrared diffuse reflectance detection according to claim 1, characterized in that, The rotating body is a transmission gear, and the output shaft of the second drive device is provided with a drive gear, which meshes with the transmission gear.

7. The automatic sample introduction device for near-infrared diffuse reflectance detection according to claim 1, characterized in that, The second drive device is a DC geared motor with an adjustable speed range of 10-60 rpm.

8. The automated sample introduction device for near-infrared diffuse reflectance detection according to any one of claims 1-7, characterized in that, The rotary worktable is an aluminum alloy worktable, and the surface of the rotary worktable has been anodized.

Images