Grain quantity monitoring device capable of adjusting scanning radius based on laser radar

Abstract

The utility model discloses a grain quantity monitoring device capable of adjusting scanning radius based on laser radar, a main cylinder is provided with a telescoping mechanism, the telescoping mechanism comprises a fixed plate, the fixed plate is provided with a first sliding plate in a sliding manner along the length direction, the first sliding plate is provided with a second sliding plate in a sliding manner along the length direction, and the second sliding plate is provided with a second sliding plate. Two belt wheels are rotationally arranged on the first sliding plate, a transmission belt is arranged between the two belt wheels, the left side and the right side of the transmission belt are connected to the fixing plate and the second sliding plate correspondingly, and the auxiliary cylinder and the auxiliary cylinder motor driving the auxiliary cylinder to rotate are both arranged on the second sliding plate. When facing a large granary, the scanning radius of the laser radar can be mainly adjusted through the telescopic mechanism, the telescopic mechanism can convey the laser radar in the direction close to the edge of the granary and conduct scanning in the conveying process, and after the telescopic mechanism extends, the telescopic mechanism is used in cooperation with the auxiliary cylinder motor; therefore, the auxiliary cylinder motor can ensure the coverage of scanning without adjusting the pitch angle of the laser radar to be large.

Description

Technical Field

[0001] This utility model relates to quantity monitoring equipment in the process of bulk grain storage, specifically to a grain quantity monitoring device based on lidar with adjustable scanning radius. Background Technology

[0002] Grain quantity monitoring devices are electronic devices used in grain warehouses to monitor the quantity of bulk grain. Existing grain quantity monitoring devices, such as the "Grain Quantity Monitoring and Warehouse Video Surveillance Device" disclosed in Chinese Patent CN208091369U, include a monitoring unit. This unit comprises a main cylinder driven by a main cylinder motor, with its rotation axis extending vertically. A secondary cylinder with a horizontally aligned rotation axis is rotatably mounted on the side wall of the main cylinder, driven by a secondary cylinder motor. A laser rangefinder (LiDAR) sensor is installed inside the secondary cylinder. In operation, the secondary cylinder motor adjusts the pitch angle of the laser rangefinder sensor, while the main cylinder motor drives the laser rangefinder sensor to rotate around its vertical axis. This allows the laser rangefinder sensor to perform a circular scan of the grain pile. The main and secondary cylinders work together to complete the laser rangefinder sensor's scan of the bulk grain within the warehouse, thereby obtaining the volume of the bulk grain. Finally, the quantity of the bulk grain is calculated based on its density.

[0003] However, when dealing with large grain silos, the existing method of adjusting the pitch angle of the auxiliary cylinder to change the scanning radius of the lidar is not very effective. This is because the larger the grain silo, the farther the center (where the lidar is located in the existing technology) is from the edge of the grain silo. The pitch angle required for the lidar to scan to the edge is larger. When the pitch angle is larger (generally exceeding 45 degrees), in order to ensure the coverage of the scan, the auxiliary cylinder motor needs to drive the lidar to rotate a very small angle each time. Moreover, as the pitch angle increases, the rotation angle needs to become smaller and smaller. It is not easy to achieve this by driving the rotation with the auxiliary cylinder motor alone, and it is difficult to guarantee the effect. Utility Model Content

[0004] This application provides a grain quantity monitoring device based on lidar with adjustable scanning radius, which can solve the problem that the existing method of adjusting the pitch angle of the auxiliary cylinder to change the scanning radius of lidar is not very effective when facing large grain silos.

[0005] To address the aforementioned technical problems, a grain quantity monitoring device based on lidar with adjustable scanning radius is provided. The device includes a main cylinder driven by a main cylinder motor. The main cylinder is equipped with a telescopic mechanism that extends and retracts horizontally. The telescopic mechanism includes a fixed plate, a first sliding plate slidably disposed on the fixed plate along its length, and a second sliding plate slidably disposed on the first sliding plate along its length. Two pulleys are rotatably disposed on the first sliding plate, one in front of the other, with their shafts both vertical. A transmission belt is disposed between the two pulleys, and a drive motor is provided to drive the two pulleys to rotate. The left and right sides of the transmission belt are respectively connected to the fixed plate and the second sliding plate, and the belt's operation is used to pull the first and second sliding plates to extend and retract. A secondary cylinder and its driving motor are both disposed on the second sliding plate.

[0006] In one embodiment, the transmission belt is a synchronous belt, and the pulley is a synchronous pulley.

[0007] In one embodiment, a third locking block is fixedly connected to the fixed plate, the third locking block being located on the inner side of the left side of the transmission belt and engaging with the teeth on the inner side of the transmission belt; a fourth locking block is fixedly connected to the second sliding plate, the fourth locking block being located on the inner side of the right side of the transmission belt and also engaging with the teeth on the inner side of the transmission belt.

[0008] In one embodiment, both the third and fourth locking blocks are adhered to the inner side of the transmission belt.

[0009] In one embodiment, a fifth sliding groove is provided on the fixed plate along its length direction, the first sliding plate is slidably connected to the fifth sliding groove, a sixth sliding groove is provided on the first sliding plate along its length direction, and the second sliding plate is slidably connected to the sixth sliding groove.

[0010] In one embodiment, the cross-sections of the fifth and sixth slide grooves are both convex.

[0011] In summary, the grain quantity monitoring device based on lidar with adjustable scanning radius disclosed in this application has the following advantages compared to the prior art:

[0012] (1) When facing a large grain warehouse, the scanning radius of the laser radar can be adjusted mainly by the telescopic mechanism. The telescopic mechanism can send the laser radar towards the edge of the grain warehouse and scan during the sending process. After the telescopic mechanism is extended, it works in conjunction with the auxiliary cylinder motor so that the auxiliary cylinder motor does not need to adjust the pitch angle of the laser radar to a large extent to ensure the coverage of the scan.

[0013] (2) In the telescopic mechanism, the drive motor drives the first sliding plate and the second sliding plate to move and extend in translation via the operation of the transmission belt, which can achieve a relatively smooth adjustment of the scanning radius;

[0014] (3) When facing a large grain warehouse, the scanning radius can be adjusted by using the telescopic mechanism and the auxiliary cylinder motor together; when facing a small grain warehouse, the scanning radius can be adjusted by using only the auxiliary cylinder motor, which is highly adaptable and flexible. Attached Figure Description

[0015] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding portions, wherein:

[0016] Figure 1 This is a perspective view of a grain quantity monitoring device based on lidar with adjustable scanning radius (the drive motor is omitted).

[0017] Figure 2 This is a perspective view of a grain quantity monitoring device based on lidar with adjustable scanning radius (the drive motor is omitted).

[0018] Figure 3 This is a perspective view of a grain quantity monitoring device based on lidar with adjustable scanning radius (the drive motor is omitted).

[0019] Figure 4 for Figure 3 A magnified view of area A in the middle;

[0020] Figure 5 This is a three-dimensional view of a grain quantity monitoring device based on lidar that can adjust the scanning radius.

[0021] In the diagram, 1. Main cylinder; 2. Main cylinder motor; 3. Fixing plate; 4. Third locking block; 5. Fifth slide groove; 6. First sliding plate; 7. Sixth slide groove; 8. Second sliding plate; 9. Auxiliary cylinder; 10. Auxiliary cylinder motor; 11. Fourth locking block; 12. Pulley; 13. Transmission belt; 14. Drive motor. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0023] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0024] Please see Figure 1 A grain quantity monitoring device based on lidar with adjustable scanning radius includes a main cylinder 1 driven by a main cylinder motor 2, which drives the main cylinder 1 to rotate at the center of the silo top. The main cylinder 1 is equipped with a telescopic mechanism that extends and retracts horizontally. The telescopic mechanism includes a fixed plate 3, which is fixedly connected to the main cylinder 1 by welding. In this invention, the length direction of the fixed plate 3 is defined as the front-back direction, and the direction perpendicular to the front-back direction in the horizontal plane is defined as the left-right direction. A first sliding plate 6 is slidably disposed on the fixed plate 3 along its length direction, and a second sliding plate 8 is slidably disposed on the first sliding plate 6 along its length direction, also along the front-back direction.

[0025] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 Two pulleys 12 are rotatably arranged one behind the other along the length of the first sliding plate 6, with their axes of rotation both vertical. A transmission belt 13 is wound between the two pulleys 12. A drive motor 14 is fixedly mounted on the first sliding plate 6, and its output shaft is fixedly connected to one of the pulleys 12 to drive the two pulleys 12 to rotate. The left side of the transmission belt 13 is fixedly connected to the fixed plate 3, and the right side is fixedly connected to the second sliding plate 8. The transmission belt 13 is used to pull the first sliding plate 6 and the second sliding plate 8 to extend and retract through its rotation. When the pulley 12 rotates clockwise, the first sliding plate 6 and the second sliding plate 8 retract; when the pulley 12 rotates counterclockwise, the first sliding plate 6 and the second sliding plate 8 extend. The auxiliary cylinder 9 and the auxiliary cylinder motor 10 that drives its rotation are both arranged on the second sliding plate 8, with their axes of rotation horizontal. Further, in the initial state, the orientation of the laser radar in the auxiliary cylinder 9 coincides with the rotation axis direction of the main cylinder 1.

[0026] Working Principle: When dealing with large grain silos, the scanning radius of the lidar can be adjusted primarily through the telescopic mechanism. This mechanism moves the lidar closer to the edge of the silo and scans during this process. After extension, the telescopic mechanism works in conjunction with the auxiliary cylinder motor 10, allowing the auxiliary cylinder motor 10 to ensure comprehensive scanning coverage without requiring a large pitch angle adjustment for the lidar. Within the telescopic mechanism, the drive motor 14, via the transmission belt 13, drives the first sliding plate 6 and the second sliding plate 8 to move and extend smoothly, enabling relatively smooth adjustment of the scanning radius. For large grain silos, the scanning radius can be adjusted using both the telescopic mechanism and the auxiliary cylinder motor 10. For smaller grain silos, the scanning radius can be adjusted solely by the auxiliary cylinder motor 10, demonstrating high adaptability and flexibility.

[0027] Please see Figure 4 In one embodiment, the transmission belt 13 is a synchronous belt (its inner tooth profile is not shown in the accompanying drawings), and the pulley 12 is a synchronous pulley 12. This arrangement is because synchronous belts can provide more precise transmission effects and higher transmission efficiency.

[0028] Please see Figure 4 In one embodiment, a third locking block 4 is fixedly connected to the fixed plate 3. The third locking block 4 is located on the inner side of the left side of the transmission belt 13 and engages with the teeth on the inner side of the transmission belt 13 (the side of the third locking block 4 that contacts the inner side of the transmission belt 13 is also toothed). A fourth locking block 11 is fixedly connected to the second sliding plate 8. The fourth locking block 11 is located on the inner side of the right side of the transmission belt 13 and also engages with the teeth on the inner side of the transmission belt 13 (the side of the fourth locking block 11 that contacts the inner side of the transmission belt 13 is also toothed). This arrangement allows the first sliding plate 6 and the second sliding plate 8 to slide by the teeth of the third locking block 4 and the fourth locking block 11 engaging with the transmission belt 13 (synchronous belt), resulting in a more reasonable structure. Furthermore, both the third locking block 4 and the fourth locking block 11 are glued to the inner side of the transmission belt 13, which improves the connection effect and stability.

[0029] Please see Figure 2 , Figure 3In one embodiment, a fifth sliding groove 5 is provided on the fixed plate 3 along its length direction, the first sliding plate 6 is slidably connected to the fifth sliding groove 5, a sixth sliding groove 7 is provided on the first sliding plate 6 along its length direction, and the second sliding plate 8 is slidably connected to the sixth sliding groove 7. This configuration makes the structure easy to implement and provides a relatively stable sliding effect. Furthermore, the cross-sections of both the fifth sliding groove 5 and the sixth sliding groove 7 are convex, further enhancing the stability of the sliding effect.

[0030] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "joined" should be interpreted broadly. For example, the term "joined" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0032] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A grain quantity monitoring device capable of scanning radius adjustment based on laser radar, comprising a main cylinder (1) driven by a main cylinder motor (2), characterized in that, The main cylinder (1) is provided with a telescopic mechanism that extends and retracts in the horizontal direction. The telescopic mechanism includes a fixed plate (3). A first sliding plate (6) is slidably arranged on the fixed plate (3) along its length direction. A second sliding plate (8) is slidably arranged on the first sliding plate (6) along its length direction. Two pulleys (12) are rotatably arranged on the first sliding plate (6), one in front of the other. Their rotation axes are both in the vertical direction. A transmission belt (13) is arranged between the two pulleys (12) and a drive motor (14) is provided to drive the two pulleys (12) to rotate. The left and right sides of the transmission belt (13) are respectively connected to the fixed plate (3) and the second sliding plate (8) to pull the first sliding plate (6) and the second sliding plate (8) to extend and retract through the operation of the transmission belt (13). The auxiliary cylinder (9) and the auxiliary cylinder motor (10) that drives its rotation are both arranged on the second sliding plate (8).

2. The grain quantity monitoring device capable of scanning radius adjustment based on laser radar according to claim 1, wherein, The transmission belt (13) is a synchronous belt, and the pulley (12) is a synchronous pulley (12).

3. The grain quantity monitoring device capable of scanning radius adjustment based on laser radar according to claim 2, characterized in that, A third locking block (4) is fixedly connected to the fixed plate (3). The third locking block (4) is located on the inner side of the left side of the transmission belt (13) and engages with the teeth on the inner side of the transmission belt (13). A fourth locking block (11) is fixedly connected to the second sliding plate (8). The fourth locking block (11) is located on the inner side of the right side of the transmission belt (13) and also engages with the teeth on the inner side of the transmission belt (13).

4. The grain quantity monitoring device capable of scanning radius adjustment based on laser radar according to claim 3, characterized in that, Both the third clip (4) and the fourth clip (11) are adhered to the inner side of the transmission belt (13).

5. The laser radar based grain quantity monitoring device capable of scanning radius adjustment according to claim 1, wherein, The fixed plate (3) is provided with a fifth slide groove (5) along its length direction, the first sliding plate (6) is slidably connected to the fifth slide groove (5), the first sliding plate (6) is provided with a sixth slide groove (7) along its length direction, and the second sliding plate (8) is slidably connected to the sixth slide groove (7).

6. The laser radar based grain quantity monitoring device capable of scanning radius adjustment according to claim 5, wherein, The cross-sections of the fifth groove (5) and the sixth groove (7) are both convex.

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