Drill-in type granary sampler and grain pile sampling and image recording method thereof

Abstract

The invention provides a drilling type granary sampler and a grain pile sampling and image recording method thereof, and belongs to the field of agricultural product storage. The problems that the sampling process of a drilling type granary sampler is invisible, so that the representativeness of samples is insufficient, and the process is difficult to trace are solved. Comprising an auger bit module, a driving module, a camera module, a sampling module, a sampling wiring module and a signal transmission module which are sequentially and coaxially cascaded from the head to the tail, the camera shooting module comprises a camera shooting bin shell, a camera is arranged in the camera shooting bin shell, the optical axis direction of the camera is perpendicular to the axial direction of the sampler, and the signal transmission module is in signal connection with the camera shooting module and the sampling wiring module. The device is mainly used for obtaining inspection samples of grain piles and shooting and recording the sampling process.

Description

Technical Field

[0001] This invention belongs to the field of agricultural product storage, and in particular relates to a drill-in grain silo sampler and a method for sampling and image recording of grain piles. Background Technology

[0002] Quality inspection is crucial for grain during its entry, storage, and release processes, and sampling is the key first step in obtaining test samples. Drilling samplers are commonly used deep sampling devices in grain depots, typically consisting of a drill bit, drill rod, drive mechanism, and sample chamber. During operation, the drill bit rotates and penetrates the grain pile to a predetermined depth. Then, a mechanical device opens the sample chamber door, allowing grain to flow into the chamber and completing the sampling.

[0003] However, in existing technologies, the entire sampling process is conducted outside the operator's line of sight. The operator cannot observe the drilling progress inside the grain pile, the visual condition of the surrounding grain quality (such as whether there is localized mold, clumping, or pests), or confirm whether the sample bin door is opened and closed correctly. This blind sampling method means that whether the sample truly represents the grain condition at the target location, especially in areas where quality differences may exist, depends entirely on the operator's experience and the randomness of equipment operation. Sample representativeness is difficult to guarantee, directly affecting the accuracy of subsequent test results. Furthermore, due to the lack of process records, if disputes arise regarding sample representativeness or the sampling process—for example, if there is suspicion that the sample was contaminated by upper impurities or was not taken from the predetermined depth—there is a lack of objective visual evidence for traceability and verification, making quality management and responsibility determination difficult. Although some technological explorations have attempted to introduce camera devices, they are often simply placed at the front of the equipment or coaxially with the drill bit. This not only makes the lens prone to clogging by grains during drilling and causing it to malfunction, but also makes it difficult to effectively observe the conditions on the side of the drill bit and the working area of ​​the sample chamber. This fails to fundamentally solve the core problems of the sampling process being invisible and untraceable. Summary of the Invention

[0004] In view of this, the present invention aims to propose a drill-type grain silo sampler and a method for sampling and recording grain piles, so as to solve the problems that the sampling process of the drill-type grain silo sampler is not visible, resulting in insufficient sample representativeness and difficulty in tracing the process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a drilling-type grain bin sampler, comprising a spiral drill bit module, a drive module, a camera module, a sampling module, a sampling wiring module, and a signal transmission module, which are coaxially cascaded from head to tail; the camera module includes a camera housing, and a camera is disposed inside the camera housing, the optical axis of the camera being perpendicular to the axial direction of the sampler; the signal transmission module is signal-connected to the camera module and the sampling wiring module.

[0006] Furthermore, the camera module also includes a camera mount, a lens barrel, and a glass lens; the camera is mounted on the camera mount, the lens barrel is located in front of the camera, and the glass lens is mounted on the camera housing and located in front of the lens barrel.

[0007] Furthermore, the auger drill bit module includes an auger drill bit, a first bearing housing, a coupling, a first rotating shaft, and a second rotating shaft. The auger drill bit is connected to one end of the first rotating shaft, which is supported by the first bearing housing. The other end of the first rotating shaft is connected to one end of the second rotating shaft via the coupling, and the other end of the second rotating shaft is connected to the drive module.

[0008] Furthermore, the drive module includes a drive motor housing and a drive motor, the drive motor being disposed inside the drive motor housing, the output end of the drive motor being connected to a second rotating shaft, and the sampler also includes an anti-rotation wing, one end of which is connected to the auger bit and the other end of which is connected to the drive motor housing.

[0009] Furthermore, the sampling module includes a sampling chamber shell, a sampling door, a sampling motor compartment, and a sampling motor. Both the sampling door and the sampling chamber shell are semi-cylindrical structures. The top and bottom of the sampling chamber shell are respectively provided with a second bearing seat and a third bearing seat. The top and bottom of the sampling door are respectively connected to the second bearing seat and the third bearing seat via rotating shafts. The sampling motor compartment is located at the bottom of the sampling chamber shell, and the sampling motor is installed inside the sampling motor compartment. The output end of the sampling motor is connected to the rotating shaft at the bottom of the sampling door via the third bearing seat.

[0010] Furthermore, the camera housing has a notch located on the side away from the optical axis of the camera, and a first groove baffle is provided at the notch.

[0011] Furthermore, a second wire groove baffle is provided between the sampling chamber shell of the sampling module and the sampling wiring module.

[0012] Furthermore, the camera module also includes an LED light ring disposed inside the camera housing and surrounding the lens barrel.

[0013] Furthermore, the auger drill bit module, drive module, camera module, sampling module, and sampling wiring module are detachably connected via threaded or flanged structures.

[0014] A method for sampling and image recording of grain piles using a drill-type grain silo sampler includes the following steps: S1: Drive the drive motor of the drive module to rotate the auger drill bit of the auger drill bit module and drill the sampler into the grain pile. S2: During drilling or when the predetermined sampling depth is reached, the camera and LED light ring of the camera module are turned on to capture real-time images of the internal condition of the grain pile and transmit the image data to external devices through the signal transmission module. S3: Control the sampling motor of the sampling module to drive the sampling chamber door to open, allowing the grain sample to enter the sampling chamber shell; S4: After sampling is completed, control the sampling motor to reverse its movement, close the sampling chamber door, turn off the camera, and then remove the sampler from the grain pile.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention integrates a camera module with an optical axis perpendicular to the axial direction on the sampler body, enabling the camera to directly observe and record the internal condition of the grain pile on the side of the drill bit and in the working area of ​​the sample compartment. This structure fundamentally changes the traditional blind sampling operation mode. Operators can monitor the drilling status in real time, observe the grain quality, and record the sampling operation process completely, generating objective image evidence. This effectively solves the problems of invisible and difficult-to-trace process. Operators can consciously observe and select representative sampling points during drilling, such as avoiding obvious abnormal areas or targeting suspected points, and reconfirm the target location before opening the sampling compartment door. This observation, confirmation, and sampling mode enables the sample to more realistically and specifically reflect the actual quality of the grain pile at a specific location, greatly improving the representativeness of the sample and the reliability of the test results. 2. The functional modules of the present invention adopt a modular design of coaxial cascade. This structure not only ensures the overall structural strength and transmission continuity of the equipment, but also allows each module to be installed, disassembled and maintained as an independent unit. The glass lens in front of the lens can effectively protect the internal optical components from direct impact and contamination by grain particles, thus improving the durability of the equipment in complex grain pile environments. 3. The LED light ring arranged around the lens tube inside the camera compartment shell of the present invention can provide necessary lighting in the dark environment inside the grain pile, ensuring that the camera can obtain clear images at any depth. The camera module is located after the drive module and before the sampling module, which avoids the area of ​​severe disturbance generated when the drill bit drills in, and can also observe the environment of the area to be sampled in advance. The structure layout is reasonable, ensuring the effectiveness and practicality of the camera function. 4. The present invention provides a first wire groove baffle between the camera chamber housing and the drive module housing, and a second wire groove baffle between the sample chamber housing and the sample wiring module. These baffle structures can organize and protect the cables connecting the power supply and signals of each module, preventing them from getting tangled, worn or pulled during repeated drilling, withdrawal and rotation of the equipment, thereby improving the safety of the internal wiring and the stability of the overall operation of the equipment. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the axial side structure of a drilling-type grain bin sampler according to the present invention; Figure 2 This is a front view schematic diagram of the structure of a drilling-type grain silo sampler according to the present invention; Figure 3 This is a cross-sectional view of a drilling-type grain silo sampler according to the present invention. Figure 4 This is a schematic diagram of the axonometric structure of the camera module of a drilling-type grain silo sampler according to the present invention; Figure 5 This is a schematic diagram of the axial structure of the sampling module of a drilling-type grain silo sampler according to the present invention. Figure 6 This is a schematic diagram of the anti-rotation wing of a drilling-type grain bin sampler according to the present invention.

[0017] In the picture: 1. Auger bit; 11. First bearing housing; 12. Coupling; 13. First rotating shaft; 14. Second rotating shaft; 2. Anti-rotation wing; 3. Drive motor housing; 31. Drive motor; 32. Drive motor housing shell; 4. Camera module; 41. Camera frame; 42. Lens tube; 43. Glass lens; 44. Camera; 45. Camera housing shell; 5. Sampling module; 51. Sampling chamber door; 52. Sampling chamber shell; 53. Second bearing housing; 54. Sampling motor housing; 55. Sampling motor; 56. Third bearing housing; 6. Sampling wiring module; 7. First groove baffle; 8. Second groove baffle. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0019] Detailed implementation method: See Figure 1-6This embodiment describes a drilling-type grain bin sampler, comprising a spiral drill bit module, a drive module 3, a camera module 4, a sampling module 5, a sampling wiring module 6, and a signal transmission module, coaxially cascaded from head to tail. This structure, through modular cascading design, integrates drilling, observation, and sampling functions, enabling the device to penetrate deep into grain piles. Its modular design facilitates installation, disassembly, and independent maintenance, enhancing its flexibility. The spiral drill bit module is used to drill into the grain pile. The spiral drill bit is streamlined, its design based on proportionally magnified bullet head characteristic parameters, effectively reducing resistance during drilling, thus minimizing friction between the grain pile and the drill bit, increasing drilling depth, and improving drilling efficiency. The drive module provides rotational power. The sampling module 5 collects grain samples at a specified depth. The sampling wiring module 6 organizes and collects the cables of each module. The camera module 4 includes a camera housing 45. The housing 45 forms the protective body of the camera module 4, providing structural support and sealing protection for the internal components. A camera 44 is installed inside the camera housing 45. The optical axis of the camera 44 is perpendicular to the axis of the sampler, allowing the camera 44 to capture the internal view of the grain pile from the side of the drill bit, rather than just an axial view. This enables real-time visualization of the internal conditions of the grain pile, such as mold and pest distribution, solving the problems of invisible sampling and difficulty in intelligently adjusting sampling points based on internal conditions. The camera 44 is a visible light camera with short focal length and autofocus, thus obtaining a wider lateral field of view and reducing costs. The signal transmission module is connected to the camera module 4 and the sampling wiring module 6. The signal transmission module transmits the image signals collected by the camera 44 to external devices. The signal transmission module uses a wired communication method based on a network cable and integrates a USB to RJ45 converter module.

[0020] The camera module 4 also includes a camera mount 41, a lens barrel 42, and a glass lens 43. The camera 44 is mounted on the camera mount 41, which is fixedly installed inside the camera housing 45 by studs and other connectors. This provides a stable mounting base for the camera 44, ensuring its position is fixed in drilling and vibrating working environments and preventing loosening from affecting image quality. The lens barrel 42 is located in front of the camera 44. One end of the lens barrel 42 is connected to the camera housing 45 by studs, and the other end is attached to the camera. The lens barrel 42 provides a positioning and shielding space for the camera 44, ensuring the accurate relative position of the optical components and forming part of a sealed cavity with the camera housing 45. The glass lens 43 is mounted on the camera housing 45 and located in front of the lens barrel 42. The glass lens 43 faces the grain pile directly, protecting the internal camera 44 and lens barrel 42 from damage caused by grain impact and intrusion while allowing light to pass through, ensuring image acquisition.

[0021] The auger drill bit module includes an auger drill bit 1, a first bearing housing 11, a coupling 12, a first rotating shaft 13, and a second rotating shaft 14. The auger drill bit 1 is connected to one end of the first rotating shaft 13, which is supported by the first bearing housing 11. The first bearing housing 11 provides radial support for the first rotating shaft 13, ensuring its stability during high-speed rotation and bearing the load generated during drilling. The other end of the first rotating shaft 13 is connected to one end of the second rotating shaft 14 via the coupling 12. The coupling 12 connects the first rotating shaft 13 and the second rotating shaft 14 to transmit torque and compensate for possible minor alignment errors. The other end of the second rotating shaft 14 is connected to the drive module 3, which transmits the rotational power from the drive module to the auger drill bit in front.

[0022] The drive module 3 includes a drive motor housing 32 and a drive motor 31. The drive motor 31 is housed within the drive motor housing 32, which provides a sealed and robust enclosure and protection space for the drive motor 31, preventing dust intrusion and mechanical impact in the grain pile environment. The output end of the drive motor 31 is connected to the second rotating shaft 14, transmitting rotational power to the second rotating shaft 14, thereby driving the auger drill system to rotate and achieve drilling. Its torque or speed can be controlled by a host computer to adapt to different drilling requirements. The sampler also includes an anti-rotation wing 2, one end of which is connected to the auger drill 1, and the other end is connected to the drive motor housing 32. The anti-rotation wing 2 has a symmetrical structure, with a conical cylinder at one end. One end is fitted onto the outside of the auger bit 1 via a conical cylinder, and the other end is fixedly connected to the drive motor housing 32. When the auger bit 1 rotates, it generates a reverse torque on the entire sampler. This torque tends to cause the sampler to rotate along with the auger bit 1. The anti-rotation wing 2 prevents the sampler from rotating along with the auger bit 1 by increasing the contact and friction area with the grain particles. When the reverse torque generated by the auger bit 1 attempts to drive the sampler to rotate, the anti-rotation wing 2 with its large surface area generates a huge static friction force with the surrounding grain. This friction force forms a resistance torque that is opposite in direction and equal in magnitude to the reverse torque, thus effectively offsetting the reverse torque. This firmly anchors the drive module 3 and all its cascaded modules in the grain pile, preventing them from rotating with the auger bit 1, ensuring the stability of drilling and the normal operation of subsequent sampling, imaging, and other tasks.

[0023] The sampling module 5 includes a sampling chamber shell 52, a sampling door 51, a sampling motor chamber 54, and a sampling motor 55. Both the sampling door 51 and the sampling chamber shell 52 are semi-cylindrical structures. This double semi-cylindrical structure allows them to be combined to form a complete cylindrical cavity. The sampling chamber shell 52, as a fixed part, constitutes the main body and base of the sampling chamber, while the sampling door 51, as a movable part, opens and closes to seal and open the sampling chamber. A second bearing seat 53 and a third bearing seat 56 are respectively provided at the top and bottom of the sampling chamber shell 52. These bearing seats provide precise rotational support points, ensuring that the sampling door 51 can stably rotate around a fixed axis. The sampling door 51 is rotated, with its top and bottom connected to the second bearing seat 53 and the third bearing seat 56 respectively via rotating shafts. This allows the sampling door 51 to rotate around the second bearing seat 53 and the third bearing seat 56 as fulcrums, thereby realizing the opening and closing action of the sampling door 51. The sampling motor compartment 54 is located at the bottom of the sampling compartment shell 52. The sampling motor compartment shell 52 is used to house and protect the sampling motor 55, isolating the sampling motor 55 from the grain sample and the external environment. The sampling motor 55 is installed inside the sampling motor compartment 54. The output end of the sampling motor 55 is connected to the rotating shaft at the bottom of the sampling door 51 via the third bearing seat 56. The sampling motor 55 is used to start the action of the sampling door 51. The forward or reverse rotation of the sampling motor 55 drives the sampling door 51 to open and close.

[0024] The camera housing 45 has a notch on its side wall, which is located away from the optical axis of the camera 44. This avoids the optical path directly in front of the camera 44, ensuring that the notch and its internal wiring do not obstruct or interfere with the side view of the camera 44. A first cable tray baffle 7 is provided at the notch, which is fixed to the camera housing 45 by studs and covers the notch to form a protective structure. This structure protects the cable leading out from the notch and prevents grain particles and dust from entering the housing or abrading or snagging the cable during the drilling into the grain pile. At the same time, the notch itself provides a channel for the cable to be led out.

[0025] A second cable tray baffle 8 is provided between the sampling chamber shell 52 of the sampling module 5 and the sampling wiring module 6. The second cable tray baffle 8 is used to protect the power and control cables connected to the sampling module 5, preventing them from being worn, snagged, or squeezed by grain particles when drilling into the grain pile, and ensuring the reliability of signal and power transmission. The second cable tray baffle 8 is set behind the first cable tray baffle 7 along the axis of the sampler, so that after the cable is led out from the camera module 4, it can pass through the first cable tray baffle 7 and the second cable tray baffle 8 in sequence before entering the sampling wiring module 6, and then lead out from the lead-in port at the bottom of the sampling wiring module 6 to connect to the controller. The continuous protection of the first cable tray baffle 7 and the second cable tray baffle 8 forms a full-process protection path for the cable.

[0026] The camera module 4 also includes an LED light ring disposed inside the camera housing 45 and surrounding the lens barrel 42. The LED light ring is used to provide illumination in the dark environment inside the grain pile. The LED light ring is arranged in a ring around the lens barrel 42, so that the LED light ring can project light from multiple angles into the field of view in front of the camera 44, thereby providing uniform and shadow-free illumination for the shooting area on the side of the camera 44, avoiding dark areas or strong reflections caused by unilateral lighting. The inner side of the LED light ring is provided with a scattering cloth to soften and evenly diffuse the point-like strong light emitted by the LED light ring, reducing the strong reflection spots formed by the light on the grain or glass lens 43 surface, thereby reducing interference with imaging and improving the clarity and detail of the images acquired in the complex environment inside the grain pile.

[0027] The auger drill bit module, drive module, camera module 4, sampling module, and sampling wiring module 6 are detachably connected via threaded or flanged structures. This allows the core functional units of the auger drill bit 1, drive module, camera module 4, sampling module, and sampling wiring module 6 to exist as independent modules. This detachable connection design enables the modules to be easily assembled and separated, facilitating the transportation and storage of the entire device. Furthermore, when a specific module needs to be independently maintained, repaired, or upgraded, it can be quickly disassembled without affecting other parts, thus improving the flexibility of use and the convenience of maintenance.

[0028] A method for sampling and image recording of grain piles using a drill-type grain silo sampler includes the following steps: S1: The drive motor 31 of the drive module drives the spiral drill bit 1 of the spiral drill bit module to rotate, and drills the sampler into the grain pile. The torque or speed of the drive motor 31 is controlled by external equipment to adapt to grain piles of different densities. The streamlined design of the spiral drill bit 1 helps to reduce drilling resistance and improve drilling efficiency and depth. S2: During drilling or when the predetermined sampling depth is reached, the camera 44 and LED light ring of the camera module 4 are activated to capture real-time images of the inside of the grain pile. The image data is then transmitted to external devices via the signal transmission module. The optical axis of the camera 44 is perpendicular to the drilling direction to acquire images of the inside of the grain pile on the side of the drill bit. The LED light ring provides uniform illumination for the dark inside of the grain pile, and its light can be softened by a diffuser to reduce glare interference. The image data is transmitted back to the external display and recording terminal in real time via a long-distance signal transmission module based on a network cable, enabling process visualization and traceability. S3: Control the sampling motor 55 of the sampling module to drive the sampling door 51 to open, so that the grain sample enters the sampling chamber shell 52. The sampling motor 55 is controlled by external equipment to drive the sampling door 51, which is a movable semi-cylinder, to rotate around the bearing seat and open, so that the grain sample enters the sampling chamber formed by the sampling chamber shell 52 and the sampling door 51. S4: After sampling is completed, control the sampling motor 55 to reverse, close the sampling chamber door 51, and turn off the camera 44. Then, remove the sampler from the grain pile. Control the sampling motor 55 to close the sampling chamber door 51 to contain and preserve the grain sample through external equipment. Turn off the camera 44 and lighting to stop recording. Then, control the drive motor 31 to reverse through external equipment to pull the entire device out of the grain pile, thus completing the sampling.

[0029] The specific embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific embodiments described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A drilling-type grain silo sampler, characterized in that: It includes a spiral drill bit module, a drive module (3), a camera module (4), a sampling module (5), a sampling wiring module (6), and a signal transmission module, which are coaxially cascaded from head to tail. The camera module (4) includes a camera housing (45), and a camera (44) is installed inside the camera housing (45). The optical axis of the camera (44) is perpendicular to the axis of the sampler. The signal transmission module is connected to the camera module (4) and the sampling wiring module (6).

2. The drilling-type grain silo sampler according to claim 1, characterized in that: The camera module (4) also includes a camera mount (41), a lens barrel (42) and a glass lens (43); the camera (44) is mounted on the camera mount (41), the lens barrel (42) is located in front of the camera (44), and the glass lens (43) is mounted on the camera housing (45) and located in front of the lens barrel (42).

3. The drilling-type grain silo sampler according to claim 1, characterized in that: The auger drill bit module includes an auger drill bit (1), a first bearing housing (11), a coupling (12), a first rotating shaft (13), and a second rotating shaft (14). The auger drill bit (1) is connected to one end of the first rotating shaft (13), which is supported by the first bearing housing (11). The other end of the first rotating shaft (13) is connected to one end of the second rotating shaft (14) via the coupling (12), and the other end of the second rotating shaft (14) is connected to the drive module (3).

4. A drilling-type grain silo sampler according to claim 3, characterized in that: The drive module (3) includes a drive motor housing (32) and a drive motor (31). The drive motor (31) is located inside the drive motor housing (32). The output end of the drive motor (31) is connected to the second rotating shaft (14). The sampler also includes an anti-rotation wing (2). One end of the anti-rotation wing (2) is connected to the auger bit (1), and the other end is connected to the drive motor housing (32).

5. A drilling-type grain silo sampler according to claim 1, characterized in that: The sampling module (5) includes a sampling chamber shell (52), a sampling door (51), a sampling motor chamber (54), and a sampling motor (55). The sampling door (51) and the sampling chamber shell (52) are both semi-cylindrical structures. The top and bottom of the sampling chamber shell (52) are respectively provided with a second bearing seat (53) and a third bearing seat (56). The top and bottom of the sampling door (51) are respectively connected to the second bearing seat (53) and the third bearing seat (56) through a rotating shaft. The sampling motor chamber (54) is located at the bottom of the sampling chamber shell (52). The sampling motor (55) is installed inside the sampling motor chamber (54). The output end of the sampling motor (55) is connected to the rotating shaft at the bottom of the sampling door (51) through the third bearing seat (56).

6. A drilling-type grain silo sampler according to claim 1, characterized in that: The camera housing (45) has a notch located on the side away from the optical axis of the camera (44), and a first groove baffle (7) is provided at the notch.

7. A drilling-type grain silo sampler according to claim 6, characterized in that: A second groove baffle (8) is provided between the sampling chamber shell (52) of the sampling module (5) and the sampling wiring module (6). The second groove baffle (8) is located behind the first groove baffle (7) along the axis of the sampler.

8. A drilling-type grain silo sampler according to claim 1, characterized in that: The camera module (4) also includes an LED light ring disposed inside the camera housing (45) and surrounding the lens barrel (42).

9. A drilling-type grain silo sampler according to claim 1, characterized in that: The auger drill bit module, drive module, camera module (4), sampling module and sampling wiring module (6) are detachably connected by thread or flange structure.

10. A method for grain pile sampling and image recording using a drill-type grain silo sampler as described in claim 1, characterized in that, Includes the following steps: S1: Drive the drive motor (31) of the drive module to rotate the auger drill bit (1) of the auger drill bit module and drill the sampler into the grain pile; S2: During the drilling process or when the predetermined sampling depth is reached, the camera (44) and LED light ring of the camera module (4) are turned on to take real-time pictures of the internal condition of the grain pile and transmit the image data to the external device through the signal transmission module. S3: Control the sampling motor (55) of the sampling module to drive the sampling chamber door (51) to open, so that the grain sample enters the sampling chamber shell (52); S4: After sampling is completed, control the sampling motor (55) to reverse its movement, close the sampling chamber door (51), and turn off the camera (44), and then remove the sampler from the grain pile.

Images