Soil nutrient detection device

Abstract

The utility model discloses a soil nutrient detection device, which relates to the technical field of soil detection and comprises a detection box, a conveying mechanism, two connecting mechanisms and two lighting mechanisms. Two detection cavities are formed in the detection box side by side, and conveying openings are formed in the side wall of the detection box and a partition plate between the two detection cavities; the two connecting mechanisms are respectively arranged in the two detection cavities, each connecting mechanism is fixedly provided with a spectrograph, a probe of each spectrograph extends into the corresponding detection cavity, and the distances between the two probes and the soil sample are the same; the two illumination mechanisms are respectively arranged in the two detection cavities, and the illumination angles of the illumination mechanisms on the soil samples are the same; the conveying mechanism horizontally penetrates through each conveying opening, and the conveying mechanism is used for placing a soil sample and conveying the soil sample into the two detection cavities in sequence, so that the soil sample can be placed below the corresponding probe and can be illuminated by the illumination mechanism. According to the soil nutrient detection device provided by the utility model, redundant variables are reduced, and the detection efficiency and the data acquisition accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of soil detection devices, in particular to a soil nutrient detection device. Background Art

[0002] The fertility of soil is crucial for agricultural production and directly affects the growth and yield of crops. Near-infrared spectroscopy technology is widely used in fields such as agriculture, food, and medicine due to its advantages of being fast, non-destructive, convenient, low-cost, and capable of simultaneously measuring multiple components. With the development of near-infrared technology, instrumental analysis technology, electronic technology, and computer technology, it has promoted the development of methods for rapidly obtaining soil component information using near-infrared spectroscopy technology, making significant progress in soil nutrient analysis based on near-infrared spectroscopy technology.

[0003] When using near-infrared spectroscopy technology for soil element detection, the detection models established by different researchers are usually designed for specific models of spectrometers. Due to differences between spectrometers, directly using the same model on different spectrometers may lead to large prediction errors, thereby reducing the universality of the model. The method for solving such problems is called model transfer. During the model transfer process, the spectrometer on which the model has been established is called the host, and the spectrometer to which the model is to be transferred is called the slave. Model transfer mainly finds the relationship between the spectral detection signals of the host and slave spectrometers and fits the corresponding conversion matrix to ensure the consistency and accuracy of the prediction results of multiple instruments, and realizes the universality of a model on different instruments. The basis for establishing a universal soil nutrient detection model on different spectrometers using model transfer technology is to collect spectral data of the same batch of standard samples using different models of spectrometers, then select the host and slave, establish a model on the host, and transfer the model to the slave in combination with the model transfer algorithm.

[0004] Existing soil nutrient detection devices based on near-infrared spectroscopy model transfer technology usually use two different models of spectrometers to separately collect spectral data of prepared standard soil samples. It is necessary to transfer the soil samples to different detection devices for detection, lacking a set of standardized devices to systematically implement this process, with low detection efficiency. Moreover, when collecting standard soil samples using different models of spectrometers, redundant variables such as different distances between the optical fiber probe and the soil sample or different illumination light source angles are likely to occur, affecting the accuracy of data collection. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a soil nutrient detection device to solve the problems existing in the above-mentioned prior art, reduce redundant variables, and improve the detection efficiency and data collection accuracy.

[0006] To achieve the above purpose, the utility model provides the following scheme:

[0007] The present utility model provides a soil nutrient detection device, which includes a detection box, a conveying mechanism, two connecting mechanisms and two lighting mechanisms; there are two detection chambers arranged side by side in the detection box, and conveying ports are provided on the side wall of the detection box and the partition between the two detection chambers; the two connecting mechanisms are respectively arranged in the two detection chambers, and a spectrometer is fixedly arranged on each connecting mechanism. The probe of the spectrometer is used to extend into the corresponding detection chamber, and the distances between the two probes and the soil sample are the same; the two lighting mechanisms are respectively arranged in the two detection chambers, and the irradiation angles of the two lighting mechanisms on the soil sample are the same; the conveying mechanism horizontally penetrates through each conveying port, and the conveying mechanism is used to place the soil sample and convey the soil sample into the two detection chambers in sequence, so that the soil sample can be placed under the corresponding probe and can be illuminated by the lighting mechanism.

[0008] Preferably, each connecting mechanism is connected to the top wall of the corresponding detection chamber, and each connecting mechanism is used to drive the corresponding spectrometer to move vertically relative to the detection box.

[0009] Preferably, each lighting mechanism includes lighting components symmetrically arranged on both sides of the soil sample along the soil sample conveying direction, and the two lighting components are both used to illuminate the soil sample; and each lighting component can adjust the irradiation angle on the soil sample.

[0010] Preferably, the inner wall of the detection chamber is provided with a blackened layer; and each detection chamber is provided with a switch door.

[0011] Preferably, the conveying mechanism includes a conveying drive assembly, a support assembly and a conveyor belt. The support assembly is used to support inside the conveyor belt, and the conveying drive assembly is arranged at one end of the conveyor belt and is used to drive the conveyor belt to rotate cyclically relative to the support assembly; the conveyor belt horizontally penetrates through each conveying port, and the conveyor belt is used to place the soil sample.

[0012] Preferably, the support assembly is provided with a plurality of them and is horizontally and spacedly supported on the conveyor belt; and a positioning component is arranged on the support assembly supported inside the end of the conveyor belt away from the conveying drive assembly, and the positioning component is used to position the initial position of the soil sample.

[0013] Preferably, a light-shielding mechanism is arranged above the conveying mechanism at each conveying port. The light-shielding mechanism includes a rotation drive component, a rotating cylinder and a light-shielding curtain. The rotation drive component is connected to the rotating cylinder, the light-shielding curtain is wound on the rotating cylinder, and the rotation drive component is used to drive the rotating cylinder to rotate so that the light-shielding curtain is wound and unwound on the rotating cylinder.

[0014] Preferably, each of the delivery ports is provided with a sealing brush disposed below the delivery mechanism. The sealing brush is used to seal the part of the delivery port below the delivery mechanism and can scrape the lower side of the delivery mechanism.

[0015] Preferably, it further includes a temperature and humidity control mechanism disposed on the partition. The temperature and humidity control mechanism is used to monitor, display, and adjust the temperature and humidity in the two detection chambers, and the temperature and humidity control mechanism can also send out warning information that can be received by the outside world.

[0016] Preferably, it further includes a central control mechanism. The central control mechanism is communicatively connected to the spectrometer and can receive the acquisition information of the spectrometer. The central control mechanism is also communicatively connected to the delivery mechanism and the light-shielding mechanism and can control the actions of the delivery mechanism and the light-shielding mechanism.

[0017] The following technical effects are achieved by the present utility model compared with the prior art:

[0018] The soil nutrient detection device provided by the present utility model is provided with two independent detection chambers in the detection box, which can enable the delivery mechanism to sequentially send soil samples into each detection chamber through each delivery port, and data collection is carried out through the probes of the spectrometers in each detection chamber. Among them, the lighting mechanisms in each detection chamber provide lighting for the probes to facilitate data collection, and the soil samples are transferred through the delivery mechanism, improving the efficiency of detection data collection; moreover, the distances between the probes and the soil samples in each detection chamber are the same and the irradiation angles of the lighting mechanisms on the soil samples are the same, reducing redundant variables other than the spectrometers and improving the accuracy of data collection. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the soil nutrient detection device provided for Embodiment 1;

[0021] Figure 2 It is a schematic structural diagram of the delivery drive assembly and a support assembly provided for Embodiment 1;

[0022] Figure 3 It is a schematic structural diagram of the light-shielding mechanism provided for Embodiment 1.

[0023] In the figure: 1 - Soil nutrient detection device; 10 - Detection box; 11 - Detection chamber; 12 - Partition; 13 - Delivery port; 20 - Connection mechanism; 30 - Spectrometer; 31 - Probe; 40 - Soil sample; 50 - Lighting mechanism; 51 - Lighting component; 511 - Lighting bracket; 512 - Halogen lamp; 60 - Delivery mechanism; 61 - Delivery drive assembly; 611 - Delivery motor; 612 - Drive belt; 613 - Drive shaft; 62 - Support assembly; 621 - Support shaft; 622 - Support frame; 63 - Conveyor belt; 70 - Positioning component; 80 - Light-shielding mechanism; 81 - Rotation drive component; 82 - Rotating cylinder; 83 - Light-shielding curtain; 84 - Fixed frame; 85 - Driving wheel; 90 - Sealing brush; 100 - Temperature and humidity control mechanism; 110 - Central control mechanism. Detailed implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] The purpose of the present invention is to provide a soil nutrient detection device to solve the problems existing in the above-mentioned prior art, reduce redundant variables, and improve the detection efficiency and data acquisition accuracy.

[0026] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes.

[0027] Embodiment 1

[0028] This embodiment provides a soil nutrient detection device 1. Please refer to Figure 1, including a detection box 10, a conveying mechanism 60, two connecting mechanisms 20 and two lighting mechanisms 50; there are two detection chambers 11 arranged side by side in the detection box 10, and conveying ports 13 are provided on the side wall of the detection box 10 and the partition 12 between the two detection chambers 11; the two connecting mechanisms 20 are respectively arranged in the two detection chambers 11, and a spectrometer 30 is fixedly arranged on each connecting mechanism 20. The probe 31 of the spectrometer 30 is used to extend into the corresponding detection chamber 11, and the distances between the two probes 31 and the soil sample 40 are the same; the two lighting mechanisms 50 are respectively arranged in the two detection chambers 11, and the irradiation angles of each lighting mechanism 50 on the soil sample 40 are the same; the conveying mechanism 60 horizontally penetrates through each conveying port 13, and the conveying mechanism 60 is used to place the soil sample 40 and convey the soil sample 40 into the two detection chambers 11 in sequence, so that the soil sample 40 can be placed below the corresponding probe 31 and can be illuminated by the lighting mechanism 50.

[0029] Setting two independent detection chambers 11 in the detection box 10 enables the conveying mechanism 60 to sequentially send the soil sample 40 into each detection chamber 11 through each conveying port 13, and data collection is carried out by the probe 31 of the spectrometer 30 in each detection chamber 11. Among them, the lighting mechanism 50 in each detection chamber 11 facilitates data collection by the probe 31. The transfer of the soil sample 40 is carried out through the conveying mechanism 60, improving the detection data collection efficiency; moreover, the distances between the probes 31 and the soil sample 40 in each detection chamber 11 are the same and the irradiation angles of the lighting mechanism 50 on the soil sample 40 are the same, reducing the redundant variables other than the spectrometer 30 and improving the accuracy of data collection.

[0030] In an alternative embodiment of the present invention, preferably, each connecting mechanism 20 is connected to the top wall of the corresponding detection chamber 11, and each connecting mechanism 20 is used to drive the corresponding spectrometer 30 to move vertically relative to the detection box 10; since the conveying mechanism 60 horizontally conveys the soil sample 40, the distance between the probes 31 and the soil sample 40 can be controlled to be the same by controlling the same height of each probe 31; each spectrometer 30 is vertically arranged; and by adjusting the height of the probe 31, different detection scenarios at different distances can also be realized according to needs.

[0031] Specifically, the connecting mechanism 20 is set as a vertically arranged threaded cylinder, and the probe 31 coaxially and fixedly passes through the threaded cylinder and extends into the detection chamber 11. The threaded cylinder is threadedly connected to the top of the detection box 10 to realize the adjustment of the vertical position of the probe 31; in addition, the connecting mechanism 20 can also be set as other mechanisms capable of realizing linear drive, such as a telescopic rod mechanism, which can drive the probe 31 to move vertically.

[0032] In the optional scheme of this embodiment, it is more preferred that each lighting mechanism 50 includes a lighting component 51 symmetrically arranged on both sides of the soil sample 40 along the conveying direction of the soil sample 40, and the two lighting components 51 are used to illuminate the soil sample 40, so that the soil sample 40 is fully illuminated from both sides; and each lighting component 51 can adjust the irradiation angle of the soil sample 40, so as to facilitate the adjustment of the irradiation angle so that the irradiation of the soil sample 40 in the two detection chambers 11 remains consistent; specifically, the lighting component 51 includes a lighting bracket 511 and a halogen lamp 512, the lighting bracket 511 is fixedly arranged on the inner wall of the detection chamber 11, and the halogen lamp 512 is vertically rotatably connected to the lighting bracket 511, and the position can be adjusted and fixed by a damping shaft, or the lighting angle can be adjusted by a conventional gear-type angle adjustment method.

[0033] In the optional scheme of this embodiment, it is more preferred that the inner wall of the detection cavity 11 is provided with a black coating layer such as black spray paint to reduce the diffuse reflection interference of noise light; each detection cavity 11 is provided with a switch door to facilitate the adjustment of the internal structure such as the lighting mechanism 50.

[0034] Furthermore, the detection box 10 is made of aluminum alloy.

[0035] In the optional scheme of this embodiment, it is more preferred that the conveying mechanism 60 includes a conveying drive component 61, a support component 62 and a conveyor belt 63, the support component 62 is used to support the inside of the conveyor belt 63, so that the conveyor belt 63 can convey smoothly; the conveying drive component 61 is arranged at one end of the conveyor belt 63 and is used to drive the conveyor belt 63 to rotate in a circle relative to the support component 62; the conveyor belt 63 horizontally passes through each conveying port 13, and the conveyor belt 63 is used to place the soil sample 40. Under the drive of the conveying drive component 61, the soil sample 40 is driven by the conveyor belt 63 to be conveyed horizontally.

[0036] Specifically, see Figure 2 The support assembly 62 includes a support shaft 621 and a support frame 622, and the conveying drive assembly 61 includes a conveying motor 611, a driving belt 612 and a driving shaft 613. The support shaft 621 is rotatably arranged on the support frame 622, and the conveying belt 63 is sleeved outside the support shaft 621. The driving shaft 613 is coaxially fixedly connected with the support shaft 621, and the conveying motor 611 is connected to the driving shaft 613 through the driving belt 612; the conveying motor 611 drives the driving shaft 613 to rotate through the driving belt 612, and drives the support shaft 621 to drive the conveying belt 63 to rotate synchronously to realize the conveying of the soil sample 40.

[0037] In the optional scheme of this embodiment, it is more preferred that a plurality of support assemblies 62 are provided, and are supported on the conveyor belt 63 at intervals in the horizontal direction to ensure the smooth operation of the conveyor belt 63; and a positioning component 70 is provided on the support assembly 62 supported at one end of the conveyor belt 63 away from the conveying drive assembly 61, that is, Figure 1A positioning component 70 is provided on the leftmost support component 62, and the positioning component 70 is used to position the initial position of the soil sample 40, which is convenient for indicating the initial placement position of the soil sample 40, and further convenient for accurately controlling the conveying distance of the soil sample 40.

[0038] Specifically, the positioning component 70 is set as an isosceles triangle plate and is fixedly arranged on the support frame 622. The perpendicular bisector of the isosceles triangle plate can be coplanar with the vertical central plane of the support shaft 621, which is used to indicate the position of the sample placement. When the soil sample 40 is placed, the left side of the soil sample 40 can be flush with the vertical central plane of the support shaft 621.

[0039] Since the size of each conveying port 13 is larger than the size of the conveyor belt 63 to facilitate the entry of the soil sample 40 into the detection chamber 11, if the conveying port 13 is not shaded, it may cause the detection chamber 11 to be not completely sealed, and the leakage of light or the mutual influence between the lights of the two detection chambers 11 may interfere with the acquisition of the spectrum. Therefore:

[0040] In an alternative solution of this embodiment, preferably, please refer to Figure 3 , a shading mechanism 80 is provided at each conveying port 13 above the conveying mechanism 60. The shading mechanism 80 includes a rotary driving component 81, a rotary cylinder 82 and a shading curtain 83. The rotary driving component 81 is connected to the rotary cylinder 82, and the shading curtain 83 is wound on the rotary cylinder 82. The rotary driving component 81 is used to drive the rotary cylinder 82 to rotate so that the shading curtain 83 is retracted and released on the rotary cylinder 82. When the soil sample 40 passes through the conveying port 13, the rotary cylinder 82 is driven to rotate to retract the shading curtain 83 to avoid affecting the conveying of the soil sample 40. After the soil sample 40 passes through the conveying port 13, the rotary cylinder 82 can be controlled to rotate to lower the shading curtain 83 to shade the conveying port 13.

[0041] Specifically, both ends of the rotary cylinder 82 are rotationally connected to the conveying port 13 through a fixing frame 84, and the fixing frame 84 is fixedly connected to the conveying port 13. One end of the rotary cylinder 82 can be rotationally connected to the fixing frame 84 through a pin shaft or a bearing. The rotary driving component 81 is set as a rotary motor, and the rotary motor is arranged inside the rotary cylinder 82. The rotary motor is fixedly connected to the fixing frame 84. A driving wheel 85 is fixedly arranged at the driving end of the rotary motor, and the driving wheel is fixedly connected to the inner wall of the rotary cylinder 82. The driving end of the rotary motor drives the driving wheel 85 to rotate, and further drives the rotary cylinder 82 to rotate relative to the fixing frame 84 to retract and release the shading curtain 83; wherein the shading curtain 83 is set as a black light-shielding cloth.

[0042] In an alternative solution of this embodiment, preferably, each conveying port 13 is provided with a sealing brush 90 disposed below the conveying mechanism 60. The sealing brush 90 is used to seal the part of the conveying port 13 below the conveying mechanism 60 and can scrape the lower side of the conveying mechanism 60. The sealing brush 90 can be composed of a row of soft bristles, which can not only effectively block light, but also brush off the soil debris falling on the conveyor belt 63, achieving the function of cleaning the conveyor belt 63. The falling of the soil debris on the bottom layer of the detection cavity 13 is also convenient for cleaning.

[0043] In an alternative solution of this embodiment, preferably, the soil nutrient detection device 1 provided in this embodiment further includes a temperature and humidity control mechanism 100 disposed on the partition plate 12. The temperature and humidity control mechanism 100 is used to monitor, display and adjust the temperature and humidity in the two detection chambers 11, and the temperature and humidity control mechanism 100 can also send out warning information that can be received by the outside world; specifically, the temperature and humidity control mechanism 100 is set as a temperature and humidity control mechanism based on a 51 single-chip microcomputer, and the single-chip microcomputer model can be AT89C51, AT89C52, etc. This temperature and humidity control mechanism 100 is placed between the two partition plates 12, and can simultaneously monitor and adjust the temperature and humidity of the two detection chambers 11 and display them through the display and control screen on the humidity control mechanism 100 to ensure that the temperature and humidity of the two detection chambers 11 are maintained at the same level; The temperature and humidity control mechanism 100 includes the following components: a display and control screen, a temperature and humidity sensor module, an alarm module, a key module, a heating module, a cooling module, a humidifying module and a dehumidifying module. The temperature and humidity sensor module, the alarm module, the key module, the heating module, the cooling module, the humidifying module and the dehumidifying module are all communicatively connected to the display and control screen; among them, a display and control screen of the LCD1602 model is adopted, and the key module is integrated thereon. The temperature and humidity sensor module adopts a temperature and humidity sensor of the DHT11 model, and the alarm module can be set as a buzzer; among them, the heating module is set as a heating resistor, the cooling module is set as a Peltier device cooperating with an electric fan to achieve cooling, and both the humidifying module and the dehumidifying module adopt conventional humidifiers and dehumidifiers; the display and control screen is disposed outside the detection box 10, and the remaining modules are disposed inside. The temperature and humidity sensor module monitors the temperature and humidity information. The user can view the environmental temperature and humidity in real time on the display and control screen. The user can set the temperature and humidity control range through the key module on the display and control screen. The default temperature range is 15°C to 30°C, and the default humidity range is 25%RH to 65%RH. The user can adjust the temperature and humidity control range according to needs. When the environmental temperature is lower than 15°C, the heating module is started, and the heating resistor operates to raise the environmental temperature. At the same time, the buzzer in the alarm module of the humidity control mechanism 100 alarms to prompt the user to stop spectral acquisition. When the environmental temperature is higher than 30°C, the cooling module is started, and the motor drives the fan to operate to lower the environmental temperature. The buzzer in the alarm module also alarms to prompt the user to stop spectral acquisition; when the environmental humidity is lower than 25%RH, the humidifying module is started, and the humidifier operates to raise the environmental humidity, and the buzzer alarms to prompt the user to stop spectral acquisition; when the environmental humidity is higher than 65%RH, the dehumidifying module is started, and the dehumidifier operates to lower the environmental humidity, and at the same time the buzzer alarms to prompt the user to stop spectral acquisition.

[0044] In an alternative solution of this embodiment, preferably, the soil nutrient detection device 1 provided in this embodiment further includes a central control mechanism 110. The central control mechanism 110 is communicatively connected to the spectrometer 30 and can receive the acquisition information of the spectrometer 30. The central control mechanism 110 is also communicatively connected to the conveying mechanism 60 and the light shielding mechanism 80 and can control the actions of the conveying mechanism 60 and the light shielding mechanism 80. The central control mechanism 11 may include a computer terminal and a remote control device. The computer terminal is communicatively connected to each spectrometer 30 and receives and processes the acquired data. The remote control is communicatively connected to the conveying mechanism 60 and the light shielding mechanism 80 and can control the actions of the conveying mechanism 60 and the light shielding mechanism 80.

[0045] A specific working process of the soil nutrient detection device 1 provided in this embodiment is as follows:

[0046] First, prepare the standard soil sample. Place the soil sample in a petri dish and scrape the upper surface flat with a spatula. Start the temperature and humidity control mechanism 100, adjust and maintain the environmental temperature and humidity within the set range, and communicatively connect the spectrometer 13 to the central control mechanism 11. Place two parallel soil samples 40 under the two probes 31 respectively, and then adjust the angle of the lighting mechanism 50 and the distance between the probe 31 and the soil sample 40 until the spectral line is stable. After the adjustment of the spectrometer 13 is completed, close the switch doors of the two detection chambers 11, place the soil sample 40 on the positioning member 70, control the conveying mechanism 60 to start running through the central control mechanism 110, and at the same time start the three light shielding mechanisms 80 to raise the light shielding curtain 83. The soil sample 40 is transported to directly below the probe 31 of the left detection chamber 11, and the conveying mechanism 60 system stops running. The three light shielding mechanisms 80 are started to lower the light shielding curtain 83, and the spectrometer 13 starts to collect the soil sample spectrum. After the collection is completed, the central control mechanism 110 controls the conveying mechanism 60 to start running, and the soil sample 40 is transported to directly below the probe 31 of the right detection chamber 11 to collect the spectrum in the same way. Finally, the sample is transported to the end of the conveying mechanism 60, remove the soil sample 40 that has been collected, place the next soil sample 40 on the positioning member 70 and repeat the above operations. Collect the spectra of three parallel samples of each soil sample 40, calculate the average spectrum as the standard spectrum for subsequent modeling, import the average spectrum into the model transfer data processing module, and gradually complete the model transfer operation according to the system prompts.

[0047] In the present utility model, specific examples are used to elaborate the principle and implementation manner of the present utility model. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present utility model. At the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A soil nutrient detection device, characterized in that: include: A detection box (10), wherein the detection box (10) has two detection chambers (11) arranged side by side, and a conveying port (13) is provided on a side wall of the detection box (10) and a partition (12) between the two detection chambers (11); Two connecting mechanisms (20) are respectively arranged on the two detection chambers (11), and a spectrometer (30) is fixedly arranged on each of the connecting mechanisms (20). The probe (31) of the spectrometer (30) is used to extend into the corresponding detection chamber (11), and the distance between the two probes (31) and the soil sample (40) is the same; Two lighting mechanisms (50) are respectively arranged in the two detection chambers (11), and the lighting angles of the lighting mechanisms (50) on the soil samples (40) are the same; and A conveying mechanism (60) horizontally penetrates each of the conveying ports (13), and is used to place the soil sample (40) on the conveying mechanism (60) and convey the soil sample (40) into the two detection chambers (11) in sequence, so that the soil sample (40) can be placed under the corresponding probe (31) and can be illuminated by the lighting mechanism (50).

2. The soil nutrient detection device according to claim 1, characterized in that: Each of the connecting mechanisms (20) is connected to a top wall of the corresponding detection chamber (11), and each of the connecting mechanisms (20) is used to drive the corresponding spectrometer (30) to move vertically relative to the detection box (10).

3. The soil nutrient detection device according to claim 2, characterized in that: Each of the lighting mechanisms (50) comprises lighting components (51) symmetrically arranged on both sides of the soil sample (40) along the conveying direction of the soil sample (40); the two lighting components (51) are used to illuminate the soil sample (40); and each of the lighting components (51) can adjust the irradiation angle of the soil sample (40).

4. The soil nutrient detection device according to claim 1, characterized in that: The inner wall of the detection cavity (11) is provided with a black coating layer; and each detection cavity (11) is provided with a switch door.

5. The soil nutrient detection device according to claim 1, characterized in that: The conveying mechanism (60) comprises a conveying drive component (61), a supporting component (62) and a conveying belt (63); the supporting component (62) is used to be supported inside the conveying belt (63); the conveying drive component (61) is arranged at one end of the conveying belt (63) and is used to drive the conveying belt (63) to rotate cyclically relative to the supporting component (62); the conveying belt (63) horizontally passes through each of the conveying ports (13); and the soil sample (40) is placed on the conveying belt (63).

6. The soil nutrient detection device according to claim 5, characterized in that: The support components (62) are arranged in plurality and are supported on the conveyor belt (63) at intervals in the horizontal direction; and a positioning component (70) is arranged on the support component (62) supported inside one end of the conveyor belt (63) away from the conveying drive component (61), and the positioning component (70) is used to locate the initial position of the soil sample (40).

7. The soil nutrient detection device according to claim 5, characterized in that: Each of the conveying ports (13) is provided with a shading mechanism (80) disposed above the conveying mechanism (60), the shading mechanism (80) comprising a rotating drive component (81), a rotating cylinder (82) and a shading curtain (83), the rotating drive component (81) being connected to the rotating cylinder (82), the shading curtain (83) being wound around the rotating cylinder (82), the rotating drive component (81) being used for driving the rotating cylinder (82) to rotate so that the shading curtain (83) is retracted onto the rotating cylinder (82).

8. The soil nutrient detection device according to claim 5, characterized in that: Each of the conveying ports (13) is provided with a sealing brush (90) disposed below the conveying mechanism (60); the sealing brush (90) is used to seal the portion of the conveying port (13) below the conveying mechanism (60) and can scrape the lower side of the conveying mechanism (60).

9. The soil nutrient detection device according to claim 1, characterized in that: It also includes a temperature and humidity control mechanism (100) disposed on the partition (12), the temperature and humidity control mechanism (100) being used to monitor, display and adjust the temperature and humidity in the two detection chambers (11), and the temperature and humidity control mechanism (100) can also issue early warning information that can be received by the outside world.

10. The soil nutrient detection device according to claim 7, characterized in that: The invention also comprises a central control mechanism (110), wherein the central control mechanism (110) is connected in communication with the spectrometer (30) and is capable of receiving acquisition information of the spectrometer (30), and the central control mechanism (110) is also connected in communication with the conveying mechanism (60) and the shading mechanism (80) and is capable of controlling the actions of the conveying mechanism (60) and the shading mechanism (80).

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