Sampling device and water quality monitoring device

Abstract

The present application discloses a sampling device and a water quality monitoring device, wherein the sampling device includes a sample trough, a test paper transport mechanism and a sampling mechanism. The sample trough is used to accommodate samples, and the sample trough is provided with an opening. The test paper transport mechanism is provided at the opening of the sample trough, and the test paper transport mechanism is used to transport the test paper so that the test paper passes through the opening. The sampling mechanism is provided in the sample trough, and the sampling mechanism can rotate to dip the sample, and the sampling mechanism can also rotate to rinse the sample droplets onto the test paper. By providing the sampling mechanism and rotating the sampling mechanism, the sampling mechanism can dip the sample and then transfer the sample to the test paper by rinsing. By adjusting the amount of sample that can be dipped at a single time, the amount of sample transferred to the test paper can be adjusted, thereby achieving micro-sampling, ensuring that the detection amount does not exceed the carrying capacity of the test paper, thereby improving the accuracy of the experiment.

Description

Technical Field

[0001] The present application relates to the technical field of water quality monitoring, and in particular to a sampling device and a water quality monitoring device. Background Art

[0002] In the process of using test paper to monitor water quality parameters, it is usually necessary to immerse the test paper in the sample to be tested. After the indicator on the test paper reacts with the sample to be tested and produces a color change, the color is observed with the naked eye or observed and identified using an optical recognition module. The color of the test paper is analyzed through image analysis technology to obtain qualitative and quantitative information of the observed object in the water sample and determine the water quality indicators.

[0003] Because the test strips can only hold a limited amount of sample during sampling, it's important to sample appropriately and place a small amount of water in contact with the test strips. The appropriate amount of water for sampling is typically microliters. Excessive water can damage the test strips, washing away the indicator, and reducing test accuracy. Summary of the Invention

[0004] In order to solve at least one of the above technical problems, the present application provides a sampling device and a water quality monitoring device, which can realize micro-sampling in water samples. The technical solution adopted is as follows.

[0005] The sampling device provided in the first aspect of the present application includes a sample trough, a test paper transport mechanism and a sampling mechanism, the sample trough is used to accommodate samples, and the sample trough is provided with an opening; the test paper transport mechanism is arranged at the opening of the sample trough, and the test paper transport mechanism is used to transport the test paper so that the test paper passes through the opening; the sampling mechanism is arranged in the sample trough, the sampling mechanism can rotate to dip the sample, the sampling mechanism can also rotate to rinse the sample droplets onto the test paper, or the sampling mechanism can rotate to dip the sample, and a part of the sampling mechanism contacts the test paper to transfer the sample to the test paper.

[0006] In certain embodiments of the first aspect of the present application, the sampling mechanism includes a rotating body and a sampling component, the sampling component is arranged on the outer peripheral surface of the rotating body, the rotating body can be used to drive the sampling component to rotate to immerse in the sample to dip the sample, and the rotating body is also used to drive the sampling component to rotate to leave the sample and rinse the sample droplets onto the test paper.

[0007] In certain embodiments of the first aspect of the present application, the sampling component may be any one of a sampling spoon, a sampling ring, and a sampling block.

[0008] In certain embodiments of the first aspect of the present application, the sampling mechanism further includes a sampling arm, one end of the sampling arm is connected to the outer circumferential surface of the rotating body, and the other end of the sampling arm is connected to the sampling component.

[0009] In certain embodiments of the first aspect of the present application, the sampling arm is an elastic member, and the sampling arm can be bent and restored along the length direction.

[0010] In certain embodiments of the first aspect of the present application, the test paper transport mechanism includes a transport belt, which is used to transport the test paper, and the plane of the transport belt is arranged parallel to or perpendicular to the opening.

[0011] In certain embodiments of the first aspect of the present application, the sampling mechanism includes a sampling wheel, a portion of which is immersed in the sample in the sample tank, and another portion of which is exposed outside the sample liquid surface for contact with the test paper.

[0012] In certain embodiments of the first aspect of the present application, the outer peripheral surface of the sampling wheel is provided with a burr structure or a brush structure.

[0013] In certain embodiments of the first aspect of the present application, the sampling device further includes a driving mechanism, which is connected to the sampling mechanism and is used to drive the sampling mechanism to rotate.

[0014] In the second aspect, the present application also provides a water quality monitoring device, comprising a test paper, a camera module and the sampling device provided in the first aspect, wherein the test paper is arranged on the test paper transport mechanism, and the camera module is arranged downstream of the sampling mechanism along the test paper transport direction, and the camera module is used to identify the test paper after the sample droplets are added.

[0015] The embodiments of the present application have at least the following beneficial effects: by providing a sampling mechanism and rotating the sampling mechanism, the sampling mechanism can dip the sample and transfer the sample to the test paper by rinsing or directly contacting the test paper. By adjusting the amount of sample that can be dipped at a time or adjusting the size of the contact part with the test paper, the amount of sample transferred to the test paper can be adjusted, thereby realizing micro-sampling and ensuring that the detection amount will not exceed the carrying capacity of the test paper, thereby improving the accuracy of water quality detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The aspects and advantages described and / or attached in the embodiments of the present application will become apparent and easily understood in conjunction with the following drawings. It should be noted that the embodiments embodied in the following drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0017] Figure 1 A schematic structural diagram of an example of a sampling device provided in Example 1 of the present application;

[0018] Figure 2 for Figure 1 AA cross-section of

[0019] Figure 3 A schematic structural diagram of another example of the sampling device provided in Example 1 of the present application;

[0020] Figure 4 A schematic diagram of the structure of the sampling device provided in Example 2 of the present application;

[0021] Figure 5 for Figure 4 BB cross-section diagram;

[0022] Figure 6 for Figure 5 A partial enlarged view of point C;

[0023] Figure 7 This is a structural diagram of the water quality monitoring device provided in Example 3 of the present application.

[0024] Reference numerals: 1000, sampling device; 1100, sample slot; 1110, opening; 1200, test paper transport mechanism; 1210, transport belt; 1220, tensioning wheel; 1300, sampling mechanism; 1310, rotating body; 1320, sampling component; 1330, sampling arm; 1400, driving mechanism;

[0025] 2000, sampling device; 2100, sample slot; 2110, opening; 2200, test paper transport mechanism; 2210, transport belt; 2300, sampling mechanism; 2310, sampling wheel; 2311, burr structure; 2400, driving mechanism;

[0026] 3000, water quality monitoring device; 3100, test paper; 3200, camera module. DETAILED DESCRIPTION

[0027] The following combination Figures 1 to 7 Embodiments of the present application are described in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limiting the present application.

[0028] In the description of this application, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] Example 1

[0031] See also Figures 1 to 3 The present application provides a sampling device 1000, comprising a sample trough 1100, a test paper transport mechanism 1200, and a sampling mechanism 1300. The sample trough 1100 is used to accommodate a sample, and the sample trough 1100 is provided with an opening 1110. The test paper transport mechanism 1200 is disposed at the opening 1110 of the sample trough 1100, and is used to transport a test paper 3100 so that the test paper 3100 passes through the opening 1110. The sampling mechanism 1300 is disposed in the sample trough 1100, and the sampling mechanism 1300 can rotate to dip in a sample, and can also rotate to swish sample droplets onto the test paper 3100.

[0032] By setting up the sampling mechanism 1300 and rotating the sampling mechanism 1300, the sampling mechanism 1300 can dip the sample and then transfer the sample to the test paper 3100 by shaking it. By adjusting the amount of sample that can be dipped at a time, the amount of sample transferred to the test paper 3100 can be adjusted, thereby realizing micro-sampling and ensuring that the detection amount will not exceed the carrying capacity of the test paper 3100, thereby improving the accuracy of the experiment and realizing high automation. Water quality indicators can be monitored continuously and multiple times, making up for the defect of manual monitoring that is time-consuming and labor-intensive.

[0033] In some embodiments, the sampling mechanism 1300 includes a rotating body 1310 and a sampling component 1320. The sampling component 1320 is disposed on the outer circumference of the rotating body 1310. The rotating body 1310 can be used to drive the sampling component 1320 to rotate until it is immersed in the sample to extract the sample. The rotating body 1310 can also drive the sampling component 1320 to rotate away from the sample and swish the sample droplets onto the test paper 3100. By providing the rotating body 1310 and the sampling component 1320, and locating the sampling component 1320 on the outer circumference of the rotating body 1310, the rotation radius of the sampling mechanism 1300 can be increased. The sampling component 1320 is directly in contact with the sample, while the rotating body 1310 is used to drive the sampling component 1320 through its own rotation, so that the rotating body 1310 does not directly contact the sample in the sample reservoir 1100. At a certain point in the rotation of the rotating body 1310, the sampling component 1320 dips into the sample to extract the sample. As the rotating body 1310 continues to rotate, the sampling component 1320 separates from the sample and, using centrifugal force, swirls the sampled droplets onto the test paper 3100, completing the sampling process. Because the sample is transferred to the test paper 3100 using centrifugal force, the sampling component 1320 does not come into direct contact with the test paper 3100. This ensures the cleanliness of the test paper 3100 while also preventing damage to the test paper 3100 during the rotation of the sampling component 1320. Furthermore, since the sample droplets are added to the test paper 3100 during the swishing process, they remain out of contact with the test paper 3100 at other times, enabling intermittent sampling of the test paper 3100 and effectively preventing the droplets from forming a continuous patch on the test paper 3100, potentially affecting the detection effect.

[0034] Optionally, according to actual sampling requirements, a plurality of sampling components 1320 may be provided on the outer circumference of the rotating body 1310 , and the plurality of sampling components 1320 may be spaced apart.

[0035] In some embodiments, sampling component 1320 can be any of a sampling spoon, a sampling ring, or a sampling block. Specifically, the sampling spoon can be a spoon-shaped structure with a recessed center portion, where the recessed area can accommodate the sample. The sampling ring has a central through-hole. When the sampling ring is immersed in the sample and removed, the sample is retained within the central through-hole due to the surface tension of the liquid. During the rotation of rotating body 1310, centrifugal force breaks down the surface tension of the liquid in the sampling ring, thereby swishing the sample droplets onto test paper 3100. By configuring sampling component 1320 as any of a sampling spoon, a sampling ring, or a sampling block, different sample sampling requirements can be met. Users can select the appropriate sampling component 1320 for sampling based on the different characteristics of the sample, such as viscosity and chemical properties, as well as the desired sampling volume.

[0036] Optionally, when multiple sampling components 1320 are provided on the rotating body 1310, the multiple sampling components 1320 can adopt the same structural form, for example, all configured as sampling spoons or sampling rings. Alternatively, the multiple sampling components 1320 can each adopt two or more structural forms, for example, some sampling components 1320 can be configured as sampling spoons and others as sampling rings. The multiple sampling components 1320 can be configured with the same sampling specifications or different sampling specifications. For example, sampling components 1320 of the same specification or type can be used for sampling, or sampling components 1320 of multiple specifications or types can be used in combination.

[0037] In some embodiments, sampling mechanism 1300 further includes a sampling arm 1330, one end of which is connected to the outer circumference of rotating body 1310, and the other end of sampling arm 1330 is connected to sampling component 1320. The combination of sampling arm 1330 and sampling component 1320 increases the rotation radius of sampling component 1320, enhances the centrifugal effect, and thus enhances the rinsing effect, ensuring that the sample can leave sampling component 1320 and reach test paper 3100. Furthermore, sampling arm 1330 can be used with rotating bodies 1310 and sampling components 1320 of different sizes, thereby reducing the size of rotating body 1310. While ensuring that sampling component 1320 can be immersed in the sample, it prevents contact between rotating body 1310 and the sample, thereby improving the reliability of rotating body 1310.

[0038] In some embodiments, the sampling arm 1330 is an elastic member that can bend and recover along its length. During the sampling process of the sampling component 1320, the sampling component 1320 and the sampling arm 1330 are subject to the flow resistance of the sample in the sample tank 1100 and the air resistance outside the sample tank 1100. By configuring the sampling arm 1330 to have an elastic structure, the sampling arm 1330 can bend and deform in the opposite direction of the rotation of the sampling component 1320 after being subjected to resistance, and accumulate elastic potential energy. During the rotation and swishing process of the sampling mechanism 1300, the kinetic energy of the sampling mechanism 1300 and the elastic potential energy generated by the deformation of the sampling arm 1330 are superimposed, thereby increasing the swishing force and the speed at which the sample droplets leave, ensuring that the sample droplets can be swung onto the test paper 3100, and improving the swishing effect during sampling.

[0039] In some embodiments, the test paper transport mechanism 1200 includes a transport belt 1210, which is used to transport the test paper 3100. The plane of the transport belt 1210 is parallel to or perpendicular to the opening 1110. The test paper 3100 is transported by the transport belt 1210, and the plane of the transport belt 1210 is parallel to or perpendicular to the opening 1110 of the sample slot 1100 (e.g., Figure 1 as shown) or vertically (as Figure 3As shown), it can not only continuously transport the test paper 3100 to improve the convenience of detection, but also flexibly set the relative positions of the test paper 3100 and the sample slot 1100 according to the installation requirements of the actual detection equipment, while reducing the difficulty of installing the test paper transportation mechanism 1200, it also makes it convenient for the sampling device 1000 to be used in conjunction with other detection equipment.

[0040] Alternatively, the test strips 3100 can be spaced apart on the conveyor belt 1210, with the spacing corresponding to the swishing interval of the sampling mechanism 1300, so that each test strip 3100 passing through the opening 1110 of the sample slot 1100 can receive the sample liquid. Alternatively, the test strips 3100 can be arranged continuously on the conveyor belt 1210, so that each swishing of the sample liquid has a corresponding test strip 3100 to receive it. Alternatively, the test strips 3100 can form the conveyor belt 1210 itself. After sampling is completed, a strip of test strips 3100 with sample liquid areas spaced apart can be obtained. The test strip 3100 can then be divided and used again or used directly for testing.

[0041] For example, tensioning wheels 1220 are provided at both ends of the conveyor belt 1210 for tensioning, thereby improving the stability of the test paper 3100 during movement. For example, a driving mechanism 1400 can also be provided to drive the tensioning wheels 1220, thereby driving the test paper 3100 to move, thereby realizing automatic transportation of the test paper 3100.

[0042] In some embodiments, the sampling device 1000 further includes a drive mechanism 1400, which is connected to the sampling mechanism 1300 and is configured to drive the sampling mechanism 1300 to rotate. By providing the drive mechanism 1400 so that the drive mechanism 1400 drives the sampling mechanism 1300 to rotate, automatic sampling of the sampling device 1000 can be achieved. Furthermore, depending on the specific location of the various mechanisms of the sampling device 1000, the rotational mode of the sampling mechanism 1300 can be changed by changing the driving mode of the drive mechanism 1400, thereby making the arrangement of the sampling device 1000 more flexible and facilitating the use of the sampling device 1000 in conjunction with other detection devices. Alternatively, the drive mechanism 1400 can drive the sampling mechanism 1300 to rotate continuously, or the drive mechanism 1400 can drive the sampling mechanism 1300 to rotate in a forward and reverse direction.

[0043] Example 2

[0044] See also Figures 4 to 6The present application provides a sampling device 2000, comprising a sample trough 2100, a test paper transport mechanism 2200, and a sampling mechanism 2300. The sample trough 2100 is used to accommodate a sample, and the sample trough 2100 is provided with an opening 2110. The test paper transport mechanism 2200 is disposed at the opening 2110 of the sample trough 2100, and is used to transport a test paper 3100 so that the test paper 3100 passes through the opening 2110. The sampling mechanism 2300 is disposed in the sample trough 2100, and the sampling mechanism 2300 can rotate to dip the sample, and a portion of the sampling mechanism 2300 contacts the test paper 3100 to transfer the sample to the test paper 3100. By setting up the sampling mechanism 2300 and rotating the sampling mechanism 2300, the sampling mechanism 2300 can dip the sample and transfer the sample to the test paper 3100 by partially contacting the test paper 3100. By adjusting the amount of sample that can be dipped at a time or adjusting the size of the contact portion with the test paper 3100, the amount of sample transferred to the test paper 3100 can be adjusted, thereby realizing micro-sampling and ensuring that the detection amount does not exceed the carrying capacity of the test paper 3100, thereby improving the accuracy of the experiment.

[0045] In some embodiments, the sampling mechanism 2300 includes a sampling wheel 2310. A portion of the sampling wheel 2310 is immersed in the sample in the sample well 2100, while another portion of the sampling wheel 2310 is exposed above the sample liquid surface for contact with the test paper 3100. Because a portion (e.g., the bottom portion) of the sampling wheel 2310 is immersed in the sample well 2100, after one rotation of the sampling wheel 2310, the entire surface of the sampling wheel 2310 is dipped into the sample. At this point, the test paper 3100 contacts the sampling wheel 2310, transferring the sample from the sampling wheel 2310 to the test paper 3100, completing the sampling. By adjusting the contact area and angle between the sampling wheel 2310 and the test paper 3100, the sample volume can be adjusted for each sampling session. Continuous sampling, intermittent sampling, or random sampling with no fixed time intervals can be implemented according to actual sampling needs. Furthermore, the sampling wheel 2310 directly contacts the test paper 3100, providing support for the test paper 3100 and preventing it from shaking, thereby improving sampling stability. This contact sampling method ensures that sample droplets are transferred to the test paper 3100, preventing sample splashing or slipping, and improving sampling reliability.

[0046] In some embodiments, the outer surface of the sampling wheel 2310 is provided with a burr structure 2311 or a brush structure. For example, the burr structure 2311 can increase the dipping area. The grooves within the burr structure 2311 can absorb and store the sample, allowing the sampling wheel 2310 to absorb a sufficient amount of sample when immersed in the sample tank 2100. This can also enhance the sample wheel 2310's adsorption of the sample, allowing a sufficient amount of sample to remain attached to the sampling wheel 2310, thereby ensuring that the sample transfer volume meets testing requirements when the sampling wheel 2310 contacts the test paper 3100. Similarly, the gaps between the bristles in the brush structure can also be used to absorb and store the sample, allowing the sample to be transferred to the test paper surface when the brush contacts the test paper. For example, the burr structure 2311 can also be provided in the form of a velvety structure on the surface of the sampling wheel 2310.

[0047] Optionally, in Example 2, except that the setting method of the sampling mechanism 2300 is different from that of Example 1, the other structures not described in detail, such as the test paper transport mechanism 2200, the transport belt 2210, the driving mechanism 2400, etc., adopt the same setting method as Example 1 and will not be repeated here.

[0048] Example 3

[0049] See also Figure 7 The present application also provides a water quality monitoring device 3000, comprising a test paper, a camera module 3200 and the sampling device 1000 provided in Example 1 or the sampling device 2000 provided in Example 2, wherein the test paper is arranged on the test paper transport mechanism 1200, and the camera module 3200 is arranged along the test paper transport direction (such as Figure 7 The dotted arrow direction shown in the figure is arranged downstream of the sampling mechanism 1300, and the camera module 3200 is used to identify the test paper after the sample droplet is added.

[0050] By applying the sampling device 1000 provided in this application to a water quality detection device, the collected water quality sample can first be placed in the sample slot 1100, and the test paper transport mechanism 1200 is used to transport the device. The sample is dipped into the sample by the sampling mechanism 1300 and transferred to the test paper, and a test paper carrying the sample can be obtained. The test paper is then moved to the recognition range of the camera module 3200 under the conveying action of the test paper transport mechanism 1200. At this time, the camera module 3200 can identify the sample on the test paper, thereby analyzing the water quality sample and determining the water quality index. By adjusting the amount of sample that can be dipped by the sampling mechanism 1300 at a time or adjusting the size of the contact portion between the sampling mechanism 1300 and the test paper, micro-sampling of water quality samples with different dosage requirements can be achieved. By adjusting the rotation frequency or rotation mode of the sampling mechanism 1300, or adjusting the arrangement of the test strips in the test strip transport mechanism 1200, continuous sampling, intermittent sampling, or random sampling can be implemented according to the testing requirements of the water quality samples. Furthermore, by providing a drive mechanism 1400 for the sampling mechanism 1300 and the test strip transport mechanism 1200, the water quality monitoring device 3000 can be operated automatically. By flexibly adjusting the sampling method of the sampling mechanism 1300 and the operation mode of the test strip transport mechanism 1200, users can monitor water quality in a variety of different modes.

[0051] In the description of this specification, if the reference terms "one embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" appear, it means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0052] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

[0053] In the description of this application, if the "," appears in the patent title, it indicates an "and" relationship, not an "or" relationship. For example, if the patent title is "A, B", it means that the content protected by this application is: the technical solution of the subject name A and the technical solution of the subject name B.

Claims

1. A sampling device, characterized in that: include A sample tank, used for accommodating a sample, wherein the sample tank is provided with an opening; a test paper transport mechanism, disposed at the opening of the sample slot, and configured to transport the test paper so as to allow the test paper to pass through the opening; The sampling mechanism is arranged in the sample tank, and the sampling mechanism can rotate to dip the sample, and the sampling mechanism can also rotate to rinse the sample droplets onto the test paper, or The sampling mechanism can rotate to dip the sample, and a portion of the sampling mechanism contacts the test paper to transfer the sample droplet to the test paper.

2. The sampling device according to claim 1, characterized in that: The sampling mechanism includes a rotating body and a sampling component. The sampling component is arranged on the outer peripheral surface of the rotating body. The rotating body can be used to drive the sampling component to rotate to immerse in the sample to dip the sample. The rotating body is also used to drive the sampling component to rotate to leave the sample and rinse the sample droplets onto the test paper.

3. The sampling device according to claim 2, characterized in that: The sampling component is any one of a sampling spoon, a sampling ring, and a sampling block.

4. The sampling device according to claim 2, characterized in that: The sampling mechanism further includes a sampling arm, one end of which is connected to the outer circumferential surface of the rotating body, and the other end of which is connected to the sampling component.

5. The sampling device according to claim 4, characterized in that: The sampling arm is an elastic member, and the sampling arm can be bent and restored along the length direction.

6. The sampling device according to any one of claims 1 to 5, characterized in that: The test paper transport mechanism includes a transport belt, which is used to transport the test paper. The plane of the transport belt is parallel to or perpendicular to the opening.

7. The sampling device according to claim 1, characterized in that: The sampling mechanism comprises a sampling wheel, a portion of which is immersed in the sample in the sample tank; and another portion of the sampling wheel is exposed outside the sample liquid surface for contacting with the test paper.

8. The sampling device according to claim 7, characterized in that: The outer peripheral surface of the sampling wheel is provided with a burr structure or a brush structure.

9. The sampling device according to claim 1, characterized in that: The sampling device further comprises a driving mechanism, which is connected to the sampling mechanism and is used to drive the sampling mechanism to rotate.

10. A water quality monitoring device, characterized in that: It comprises a test paper, a camera module and a sampling device as described in any one of claims 1 to 9, wherein the test paper is arranged on the test paper transport mechanism, the camera module is arranged downstream of the sampling mechanism along the test paper transport direction, and the camera module is used to identify the test paper after the sample droplet is added.

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