Unmanned aerial vehicle multispectral tobacco plant growth monitoring device

Abstract

The utility model discloses an unmanned aerial vehicle multispectral tobacco plant growth monitoring device which comprises an unmanned aerial vehicle body and a multispectral camera, a telescopic rod is fixedly installed at the bottom of the unmanned aerial vehicle body, a rotating rod is arranged between the telescopic rod and the multispectral camera, the top end of the rotating rod is rotatably connected with the telescopic rod, and the bottom of the rotating rod is connected with the multispectral camera through a connecting rod. According to the unmanned aerial vehicle multispectral tobacco plant growth vigor monitoring device, the unmanned aerial vehicle body is operated and used for monitoring the tobacco plant growth vigor, compared with a manual on-site sampling method, the tobacco field growth vigor space distribution can be rapidly known, and the ratio of the poor tobacco growth vigor area to the excessively-vigorous tobacco growth vigor area can be accurately evaluated. The telescopic rotating holder can be controlled to enable the multispectral camera to vertically and obliquely shoot tobacco plants in a tobacco field at 90 degrees and 45 degrees respectively, the whole tobacco field only needs to fly back and forth twice, vertical and oblique shooting is achieved by controlling the telescopic rotating holder, tobacco plant tobacco leaf growth information can be more accurately obtained, and the problem that tobacco leaves are mutually shielded is solved.

Description

Technical Field

[0001] This application relates to the field of tobacco cultivation technology, and in particular to a multispectral tobacco plant growth monitoring device using an unmanned aerial vehicle (UAV). Background Technology

[0002] During the field growth period of tobacco plants, their growth at different stages is closely related to the final yield and quality of tobacco leaves. Therefore, judging the growth of tobacco plants during the rosette stage, vigorous growth stage, and topping stage is an important part of tobacco planting management and an important basis for subsequent agricultural operations such as topping and harvesting.

[0003] However, existing methods for judging tobacco plant growth mostly rely on manual on-site sampling, which is inefficient, highly subjective, and not conducive to large-scale implementation. Utility Model Content

[0004] To address the aforementioned technical problems, the purpose of this utility model is to provide a multispectral tobacco plant growth monitoring device for unmanned aerial vehicles (UAVs), which can quickly understand the spatial distribution of tobacco plant growth and accurately assess the proportion of areas with poor and excessive tobacco growth.

[0005] The technical solution provided by this utility model is as follows:

[0006] A drone-based multispectral tobacco plant growth monitoring device includes a drone body and a multispectral camera. A telescopic rod is fixedly installed at the bottom of the drone body, and a rotating rod is provided between the telescopic rod and the multispectral camera. The top of the rotating rod is rotatably connected to the telescopic rod, and the bottom is connected to the multispectral camera through a connecting rod. The rotating rod includes an electrically limited carbon fiber hollow rod that can switch between 90° and 45°, allowing the multispectral camera to take vertical and tilted pictures of the tobacco plants in the tobacco field at 90° and 45° respectively.

[0007] Preferably, the telescopic rod is a three-section electric telescopic rod, including a drive assembly, an outer rod, a middle rod, and an inner rod, wherein the outer rod, the middle rod, and the inner rod are cylindrical carbon fiber hollow tubes with open ends.

[0008] Preferably, a limiting annular block is fixedly connected to the outer wall of the rotating rod, and the limiting annular block is rotatably connected to the inside of the telescopic rod, so that the rotating rod can switch between 90° and 45°.

[0009] Preferably, the rotating rod and the telescopic rod are connected by a shaft seal.

[0010] Preferably, the multispectral camera comprises six 1 / 2.8-inch CMOS sensors, including one color sensor for visible light imaging and five monochrome sensors for multispectral imaging, with an effective pixel count of 20 million. The wavelengths of the five monochrome sensors are as follows: blue: 450 nm ± 16 nm; green: 560 nm ± 16 nm; red: 650 nm ± 16 nm; red edge: 730 nm ± 16 nm; near-infrared: 840 nm ± 26 nm.

[0011] Preferably, support frames are fixedly installed at both ends of the bottom of the drone body.

[0012] Compared to existing technologies, this utility model's UAV multispectral tobacco plant growth monitoring device monitors tobacco plant growth using the UAV itself. Compared to manual on-site sampling methods, it can quickly understand the spatial distribution of tobacco plant growth and accurately assess the proportion of areas with poor and excessive growth. Furthermore, it can control the telescopic rotating gimbal to allow the multispectral camera to capture vertical and oblique images of the tobacco plants at 90° and 45° angles respectively. Only two round trips are needed to view the entire tobacco field. The leaf area index (LAI) of the tobacco plants can be calculated from the images captured by the multispectral camera and compared with stored LAI data to determine the growth status of the monitored tobacco plants. By controlling the telescopic rotating gimbal to achieve vertical and oblique imaging, it can obtain more accurate information on tobacco plant and leaf growth and solve the problem of mutual shading among tobacco leaves. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the UAV multispectral tobacco plant growth monitoring device according to an embodiment of this utility model. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0017] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0019] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0020] like Figure 1 As shown, this utility model embodiment provides a drone multispectral tobacco plant growth monitoring device, including a drone body 1 and a multispectral camera 4. A telescopic rod 3 is fixedly installed at the bottom of the drone body 1, and a rotating rod 5 is provided between the telescopic rod 3 and the multispectral camera 4. The top end of the rotating rod 5 is rotatably connected to the telescopic rod, and the bottom end is connected to the multispectral camera 4 through a connecting rod 6.

[0021] In this embodiment, the telescopic rod 3 is a three-section electric telescopic rod, including a drive assembly, an outer rod, a middle rod, and an inner rod. The outer rod, middle rod, and inner rod are cylindrical carbon fiber hollow tubes with open ends.

[0022] In this embodiment, the rotating rod 5 includes an electrically controlled, limit-positioning hollow carbon fiber rod that can switch between 90° and 45°, allowing the multispectral camera 4 to capture vertical and tilted images of the tobacco plants in the tobacco field at 90° and 45° respectively. Specifically, a limiting annular block is fixedly connected to the outer wall of the rotating rod 5, and the limiting annular block is rotatably connected to the inside of the telescopic rod 3, allowing the rotating rod 5 to switch between 90° and 45°. The rotating rod 5 and the telescopic rod are connected by a shaft seal.

[0023] In this embodiment, the multispectral camera 4 includes six 1 / 2.8-inch CMOS sensors, including one color sensor for visible light imaging and five monochrome sensors for multispectral imaging, with an effective pixel count of 20 million. The wavelengths of the five monochrome sensors are as follows: Blue (B): 450 nm ± 16 nm; Green (G): 560 nm ± 16 nm; Red (R): 650 nm ± 16 nm; Red Edge (RE): 730 nm ± 16 nm; Near Infrared (NIR): 840 nm ± 26 nm.

[0024] In this embodiment, support frames 2 are fixedly installed at both ends of the bottom of the UAV body 1 to prevent the multispectral camera 4 from touching the ground.

[0025] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multispectral tobacco plant growth monitoring device for unmanned aerial vehicles (UAVs), characterized in that, The device includes a drone body (1) and a multispectral camera (4). A telescopic rod (3) is fixedly installed at the bottom of the drone body (1). A rotating rod (5) is provided between the telescopic rod (3) and the multispectral camera (4). The top of the rotating rod (5) is rotatably connected to the telescopic rod, and the bottom is connected to the multispectral camera (4) through a connecting rod (6). The rotating rod (5) includes an electrically limited carbon fiber hollow rod that can switch between 90° and 45°, so that the multispectral camera (4) can take vertical and tilted pictures of the tobacco plants in the tobacco field at 90° and 45° respectively.

2. The UAV multispectral tobacco plant growth monitoring device as described in claim 1, characterized in that, The telescopic rod (3) is a three-section electric telescopic rod, including a drive assembly, an outer rod, a middle rod, and an inner rod. The outer rod, middle rod, and inner rod are cylindrical carbon fiber hollow tubes with open ends.

3. The UAV multispectral tobacco plant growth monitoring device as described in claim 1, characterized in that, The outer wall of the rotating rod (5) is fixed to a limiting ring block, which is rotatably connected to the inside of the telescopic rod (3), so that the rotating rod (5) can switch between 90° and 45°.

4. The UAV multispectral tobacco plant growth monitoring device as described in claim 1, characterized in that, The rotating rod (5) and the telescopic rod are connected by a shaft seal.

5. The UAV multispectral tobacco plant growth monitoring device as described in claim 1, characterized in that, The multispectral camera (4) contains 6 CMOS sensors, including 1 color sensor for visible light imaging and 5 monochrome sensors for multispectral imaging. The wavelengths of the 5 monochrome sensors are as follows: blue: 450 nm ± 16 nm; green: 560 nm ± 16 nm; red: 650 nm ± 16 nm; red edge: 730 nm ± 16 nm; near infrared: 840 nm ± 26 nm.

6. The UAV multispectral tobacco plant growth monitoring device as described in claim 1, characterized in that, The unmanned aerial vehicle (UAV) body (1) has support frames (2) fixedly installed at both ends of its bottom.

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