Field crop growth monitoring system and monitoring method based on low-altitude remote sensing

Abstract

The invention discloses a field crop growth monitoring system and method based on low-altitude remote sensing, and belongs to the technical field of crop monitoring. Comprising an unmanned aerial vehicle body, the bottom end of the unmanned aerial vehicle body is provided with a foot stool and a camera body, the bottom end of the unmanned aerial vehicle body is provided with a mounting disc, four photovoltaic power generation panels, a turnover assembly and a linkage assembly, and the mounting disc is internally provided with a photovoltaic power generation module, a standby battery and a light sensation control module. According to the invention, the photovoltaic power generation module and the standby battery supply power to the electrical components in sequence, so that the flight cruising ability of the unmanned aerial vehicle body and the shooting cruising ability of the camera body can meet the monitoring requirements of field crops, and the unmanned aerial vehicle does not need to frequently return to a base station for charging, thereby improving the monitoring efficiency; through cooperative arrangement of the overturning assembly and the linkage assembly, the photovoltaic power generation panel and the camera body can be automatically subjected to angle adjustment along with illumination changes, so that the power generation efficiency is improved, and shot images are clearer.

Description

Technical Field

[0001] The invention relates to the technical field of crop monitoring, and in particular to a field crop growth monitoring system and a monitoring method based on low-altitude remote sensing. Background Art

[0002] Crop growth refers to the conditions and trends of crop growth. By monitoring the growth of crops, we can timely understand the growth conditions, pests and diseases or nutritional status of each crop in each growth period, and predict the yield, so as to guide people to take corresponding management measures. With the development of remote sensing technology and drone technology, remote sensing images of crops can be obtained by aerial photography with drones equipped with high-definition cameras. Remote sensing images can be used to record the growth conditions of crops at different stages in real time, and the images can be analyzed and processed to obtain sequential images of the same location and time, so as to fully understand the growth of crops at different growth stages.

[0003] The existing technology has the following defects: First, when the UAV needs to perform a mission, it may sometimes encounter a situation where the target area is in bad weather. At this time, the resistance to the UAV will increase, which may easily cause additional consumption of the UAV's power and affect its endurance; Second, traditional remote sensing has low resolution and cannot estimate plant growth dynamics. It also has poor timeliness, relies on manual operation experience, and consumes human resources. In order to overcome defect one, the prior art (application number: 202420181944.2, Chinese patent with application date of 2024-01-25) discloses a low-altitude remote sensing and mapping UAV. When the main body of the UAV is launched, it only needs to start the driving component to move the slide bar upward and drive the landing gear to move upward, thereby reducing the windward area of ​​the UAV, that is, reducing the resistance encountered during flight, which is beneficial to improving the endurance of the device and solving the above-mentioned defect one; In order to overcome defect two, the prior art (application number: 202410940199.X, Chinese patent with application date of 2024-07-15) discloses a dynamic monitoring method for the growth of woody spring flowering plants based on low-altitude remote sensing technology. By introducing the ratio of linear stretched images to original images as a method for selecting the optimal image, deep learning is improved. The classification accuracy of the algorithm is improved, and the pixel statistics of each element of a single plant after statistical classification using a morphological algorithm are greatly reduced, which solves the second defect mentioned above; although the prior art 1 and the prior art 2 can overcome the above-mentioned defects, when monitoring field crops through remote sensing drones, due to the weight limitation of the drone itself, the capacity of the power supply battery will not be too large, and the range of field crops required for monitoring is large. The flight endurance of existing drones and the shooting endurance of cameras cannot meet the needs, and they need to return to the base station for charging from time to time, which makes the monitoring efficiency low; and when drones take aerial photos of field crops, the image coverage area is wide, and affected by factors such as shooting angle and lighting conditions, it will cause part of the captured image to be unclear, making it difficult to perform subsequent image extraction and processing, which increases the difficulty of monitoring.

[0004] In response to the above problems, it is urgent to carry out innovative design based on the original equipment. Therefore, we proposed a field crop growth monitoring system and monitoring method based on low-altitude remote sensing that can solve the above problems well. Summary of the invention

[0005] The purpose of the present invention is to provide a field crop growth monitoring system and monitoring method based on low-altitude remote sensing, so as to solve the problem proposed in the above background technology that the field crop growth monitoring system based on low-altitude remote sensing on the market currently has a limited capacity of the power supply battery due to the weight of the drone itself during monitoring, and the range of field crops to be monitored is large. The flight endurance of existing drones and the shooting endurance of cameras cannot meet the demand, and they need to return to the base station for charging from time to time, resulting in low monitoring efficiency; and the image coverage area of ​​drones is wide when taking aerial photos of field crops, but affected by factors such as shooting angle and lighting conditions, the captured image will be partially unclear, making it difficult to perform subsequent extraction and processing, which increases the difficulty of monitoring.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a field crop growth monitoring system based on low-altitude remote sensing, comprising an unmanned aerial vehicle (UAV) body, wherein four sets of propellers are installed at the four corners of the UAV body through arms, and two tripods are foldably installed at the bottom end of the UAV body, and a camera body is detachably installed between the two tripods, and a mounting plate is fixedly installed at the bottom end of the UAV body, and photovoltaic panels are rotatably installed on the four sides of the mounting plate, and photovoltaic power generation modules, backup batteries and light sensing control modules are respectively installed inside the mounting plate, and the photovoltaic power generation modules, backup batteries and light sensing control modules are electrically connected in pairs, and the four photovoltaic panels convert light energy into electrical energy that is concentrated in the photovoltaic power generation module. , the camera body, the light sensing control module and other electrical components are powered in turn through the photovoltaic power generation module and the backup battery, so that the flight endurance of the drone body and the shooting endurance of the camera body can meet the monitoring needs of field crops, avoiding the need to return to the base station for charging from time to time, thereby improving the monitoring efficiency; the four photovoltaic power generation panels are connected to the mounting plate through a flip assembly, and can automatically flip as the light changes, and the camera body is linked with the flip assembly through a linkage assembly, so that the camera body can be synchronously rotated and adjusted with the flipping of the photovoltaic power generation panel, so as to adjust the shooting angle according to the light change, so that the captured image is clearer, so as to facilitate the subsequent extraction and processing of the image, and reduce the difficulty of monitoring.

[0007] Preferably, mounting rings are formed around the bottom of the mounting plate, and inner sleeve rods are fixedly connected to the inner side of the end of the photovoltaic panel close to the mounting plate, and the four inner sleeve rods are rotatably sleeved on the inner sides of the corresponding mounting rings.

[0008] Preferably, a charging hole is provided at the bottom end of the mounting plate corresponding to a position below the backup battery, and the charging hole overlaps with the charging port of the backup battery.

[0009] Preferably, the flip assembly includes a linkage frame fixedly connected to the bottom of the inner sleeve rod, a push-pull rod is fixedly connected to the middle of the bottom cross bar of the linkage frame, the end of the push-pull rod is fixedly connected to a ball shell, a ball block is movably sleeved inside the ball shell, a sliding rod is fixedly connected to the top of the ball block, an eccentric rotating frame is slidably sleeved on the outer sides of the four sliding rods, a cross-shaped connecting frame is fixedly connected to the inner side of the eccentric rotating frame, a micro motor is fixedly installed at the bottom center of the mounting plate, and the output part of the micro motor is fixedly connected to the center of the connecting frame.

[0010] Preferably, a circle of limiting protrusions is formed on the top of the sliding rod, and limiting sliding grooves are provided around the bottom end of the mounting plate, and the four top protrusions of the sliding rods slide in a limited manner on the inner side of the corresponding limiting sliding grooves.

[0011] Preferably, the eccentric rotating frame is formed with convex plates around it, and an eccentric groove is opened at the convex plate. The eccentric groove is an eccentrically arranged arc-shaped groove structure, and the four sliding rods slide correspondingly on the inner side of the eccentric groove.

[0012] Preferably, the micro motor is electrically connected to the photovoltaic power generation module, the backup battery and the light sensing control module respectively, and the micro motor is fixedly mounted on the bottom end of the mounting plate through a support member, and the support member is composed of support columns on all sides and a support plate at the bottom.

[0013] Preferably, the linkage assembly includes a mounting bracket detachably connected to the outside of the camera body, the top of both sides of the mounting bracket are fixedly connected with shaft rods, the two shaft rods are rotatably connected to the inner sides of corresponding tripods respectively, the outer wall of one of the shaft rods located on the outside of the tripod is formed with protruding teeth, the protruding teeth are evenly distributed on the circumference, the bottom of the protruding teeth is meshed with a rack, the top of the rack is fixedly connected with a sliding bar, the two ends of the sliding bar are abutted against two sections of the rod body adjacent to the connecting bracket, the bottom end of the mounting plate is fixedly connected with a fixed slide seat, and the sliding bar slides horizontally on the inner side of the fixed slide seat.

[0014] Preferably, a method for using the monitoring system is also disclosed, and the specific method steps are as follows: S1. First, the four propellers are started to rotate through the electronic speed regulator installed at the end of the arm to provide lift for the take-off of the UAV body. After the UAV body takes off, the camera body is used to remotely sense the field crops. When there is sufficient light, the photovoltaic panels can fully convert light energy into electrical energy and store it in the photovoltaic power generation module as the driving power supply for the camera body, light sensing control module and micro motor. When the light conditions are poor and the power in the photovoltaic power generation module is exhausted, the backup battery is automatically started as a reserve power supply to continue to power the electrical components, thereby greatly improving the endurance of the device.

[0015] S2. The light sensing control module can sense the light conditions in real time, and can automatically control the micro motor to start as the light conditions change. The micro motor drives the eccentric rotating frame to rotate, and through the limited sliding of the eccentric groove and the sliding rod, the eccentric rotating frame will drive the four sliding rods to move closer or farther synchronously. The sliding rod continues to drive the inner sleeve rod to rotate along the mounting sleeve ring through the transmission of the ball block, the ball shell, the push-pull rod, and the linkage frame in turn. The photovoltaic panels rotate synchronously to enable them to fully receive light, thereby ensuring the power generation efficiency of the photovoltaic panels.

[0016] S3. When the eccentric rotating frame rotates, the connecting frame inside it rotates synchronously, and drives the slide bar to translate along the fixed slide seat, and the rack moves synchronously, and then drives the shaft rod to rotate through the engagement between the bottom of the rack and the protruding teeth. The mounting frame and the camera body inside it rotate synchronously, that is, the shooting angle of the camera body can be synchronously adjusted as the lighting conditions change, so that the camera picture is clearer.

[0017] S4. When the camera body's shooting picture fully covers the field crops, the user can recall the remote sensing drone device, and the data storage module in the camera body will automatically store the shot images, and send the image data to the data processing module of the central control system wirelessly. The data processing module cuts and divides the picture through the optical image acquisition module, performs batch precision processing and calculation, and calls out previous data for comparison, thereby realizing the growth analysis, yield prediction, and pest and nutrition management policies of field crops.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the photovoltaic power generation module and the backup battery are used to power the electrical components in turn, so that the flight endurance of the drone body and the shooting endurance of the camera body meet the monitoring needs of field crops, and there is no need to frequently return to the base station for charging, thereby improving the monitoring efficiency. Through the coordinated setting of the flip component and the linkage component, the photovoltaic power generation panel and the camera body can automatically adjust the angle as the light changes, thereby improving the power generation efficiency and making the captured image clearer.

[0019] The specific contents are as follows: 1. When there is sufficient sunlight, the photovoltaic panels are used to convert light energy into electrical energy and store it in the photovoltaic power generation module, which serves as the driving power source for the camera body, light sensing control module and micro motor; when the lighting conditions are poor and the power in the photovoltaic power generation module is exhausted, the backup battery is automatically started as a reserve power source to continue to power the electrical components, thereby greatly improving the endurance of the device.

[0020] 2. The light sensing control module can sense the light conditions in real time, and can automatically control the micro motor to start as the light conditions change. The micro motor drives the eccentric rotating frame to rotate, and the eccentric rotating frame continues to drive the four sliding rods to move closer or farther synchronously. The sliding rods continue to drive the photovoltaic panels to rotate synchronously through the ball block, ball shell, push-pull rod, linkage frame, and inner sleeve rod, so that they can fully receive light, thereby ensuring the power generation efficiency of the photovoltaic panels.

[0021] 3. The eccentric rotating frame drives the connecting frame to rotate synchronously, and drives the sliding bar to translate, the rack to move synchronously, and then drives the shaft to rotate through the engagement between the bottom of the rack and the protruding teeth. The mounting frame and the camera body inside it rotate synchronously, that is, the shooting angle of the camera body can be adjusted synchronously with the change of lighting conditions, so that the camera picture is clearer.

[0022] 4. The data storage module in the camera body will automatically store the captured images and send the image data wirelessly to the data processing module of the central control system. The data processing module will cut and divide the picture through the optical image acquisition module, and then perform batch precision processing and calculation to realize the analysis and prediction of the growth of field crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the main structure of the present invention as a whole; Figure 2 It is a bottom view structural schematic diagram of the whole present invention; Figure 3 It is a schematic diagram of the structure of each module inside the installation disk of the present invention; Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 5 It is a partial structural schematic diagram of the flip assembly of the present invention; Figure 6 It is a structural schematic diagram of the eccentric rotating frame of the present invention; Figure 7 This is a schematic diagram of the structure of the bottom of the mounting plate of the present invention; Figure 8 It is a schematic diagram of the connection structure between the protruding teeth of the shaft rod and the rack of the present invention.

[0024] In the figure: 1. UAV body; 2. Machine arm; 3. Propeller; 4. Tripod; 5. Camera body; 6. Mounting plate; 7. Mounting ring; 8. Photovoltaic panel; 9. Inner sleeve rod; 10. Photovoltaic module; 11. Backup battery; 12. Light sensing control module; 13. Charging port; 14. Linkage frame; 15. Push-pull rod; 16. Ball shell; 17. Ball block; 18. Sliding rod; 19. Limiting slide groove; 20. Eccentric rotating frame; 21. Eccentric groove; 22. Connecting frame; 23. Micro motor; 24. Support; 25. Mounting frame; 26. Shaft; 27. Raised teeth; 28. Rack; 29. ​​Slide bar; 30. Fixed slide seat. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1: In the existing field crop growth monitoring system based on low-altitude remote sensing, due to the small capacity of the power supply battery of the drone and the large monitoring range of the field crops, the flight endurance of the drone and the shooting endurance of the camera cannot meet the demand, and the drone needs to return to the base station for charging from time to time, which makes the monitoring efficiency low. In order to solve this technical problem, this embodiment discloses the following technical contents: Please refer to Figure 1-Figure 3 As shown, a field crop growth monitoring system based on low-altitude remote sensing includes a drone body 1, four sets of propellers 3 are installed at the four corners of the drone body 1 through a machine arm 2, the bottom end of the drone body 1 can be folded and installed with two tripods 4, a camera body 5 is detachably installed between the two tripods 4, a mounting plate 6 is fixedly installed at the bottom end of the drone body 1, and photovoltaic panels 8 are rotatably installed on the four sides of the mounting plate 6. Specifically, mounting rings 7 are formed on the bottom of the surrounding areas of the mounting plate 6, and inner sleeve rods 9 are fixedly connected to the inner side of the end of the photovoltaic panel 8 close to the mounting plate 6, and the four inner sleeve rods 9 are rotatably sleeved on the corresponding The inner side of the mounting ring 7, wherein the inside of the mounting disk 6 are respectively installed with a photovoltaic power generation module 10, a backup battery 11 and a light sensing control module 12, and the photovoltaic power generation modules 10, the backup battery 11 and the light sensing control modules 12 are electrically connected to each other, and the four photovoltaic power generation panels 8 convert the light energy into electrical energy which is concentrated in the photovoltaic power generation module 10. In addition, a charging hole 13 is provided at the bottom end of the mounting disk 6 corresponding to the position below the backup battery 11, and the charging hole 13 overlaps with the charging port of the backup battery 11, so that the backup battery 11 can be directly charged through the charging hole 13.

[0027] The photovoltaic power generation module 10 and the backup battery 11 are used to supply power to the camera body 5, the light sensing control module 12 and other electrical components in turn, so that the flight endurance of the drone body 1 and the shooting endurance of the camera body 5 meet the monitoring needs of field crops, avoiding the need to frequently return to the base station for charging, thereby improving the monitoring efficiency. When in use, the four sets of propellers 3 are first started to rotate by the electronic speed regulator installed at the end of the arm 2 to provide lift for the take-off of the drone body 1. After the drone body 1 takes off, the field crops are remotely sensed and photographed by the camera body 5. When the light is sufficient, the photovoltaic power generation panel 8 can fully convert light energy into electrical energy and store it in the photovoltaic power generation module 10 to serve as the driving power source for the camera body 5, the light sensing control module 12 and the micro motor 23. When the light conditions are poor and the power in the photovoltaic power generation module 10 is exhausted, the backup battery 11 is automatically started as a reserve power source to continue to supply power to the electrical components, thereby greatly improving the endurance of the device.

[0028] When the shooting picture of the camera body 5 fully covers the field crops, the user can recall the remote sensing drone device, and the data storage module in the camera body 5 will automatically store the shot image, and send the image data to the data processing module of the central control system wirelessly. The data processing module cuts and divides the picture through the optical image acquisition module, performs batch precision processing and calculation, and calls out previous data for comparison, thereby realizing the growth analysis of field crops, yield prediction, and the formulation of pest and nutrition management policies.

[0029] Embodiment 2: The technical content disclosed in this embodiment is a further improvement on the basis of the above-mentioned embodiment 1. When the existing field crop growth monitoring system based on low-altitude remote sensing is used for aerial photography of field crops, the image coverage area is wide, and the shooting angle, lighting conditions and other factors may cause the captured image to be partially unclear, making it difficult to perform subsequent extraction and processing, which increases the difficulty of monitoring. In order to further solve this technical problem, this embodiment discloses the following technical content: Figure 2 , Figure 4-Figure 8 As shown, four photovoltaic panels 8 are connected to the mounting plate 6 via a flip assembly and can automatically flip as the light changes. The camera body 5 is linked to the flip assembly via a linkage assembly, so that the camera body 5 can be rotated and adjusted synchronously with the flipping of the photovoltaic panels 8 to adjust the shooting angle according to the light changes, making the captured image clearer, facilitating the subsequent extraction and processing of the image, and reducing the difficulty of monitoring.

[0030] Specifically, the flip assembly includes a linkage frame 14 fixedly connected to the bottom of the inner sleeve rod 9, a push-pull rod 15 is fixedly connected to the middle of the bottom cross bar of the linkage frame 14, and a ball shell 16 is fixedly connected to the end of the push-pull rod 15. A ball block 17 is movably sleeved inside the ball shell 16, and a sliding rod 18 is fixedly connected to the top of the ball block 17. A circle of limiting protrusions is formed on the top of the sliding rod 18, and a limiting slide groove 19 is provided around the bottom end of the mounting plate 6. The top protrusions of the four sliding rods 18 are limited to slide on the inner side of the corresponding limiting slide groove 19, and the outer sides of the four sliding rods 18 are slidably sleeved with an eccentric rotating frame 20, wherein the eccentric rotating frame 20 is formed with a convex plate around it, and an eccentric Groove 21, the eccentric groove 21 is an eccentrically arranged arc-shaped groove structure, and the four sliding rods 18 slide correspondingly on the inner side of the eccentric groove 21. The inner side of the eccentric rotating frame 20 is fixedly connected with a cross-shaped connecting frame 22, and a micro motor 23 is fixedly installed at the bottom center of the mounting disk 6. The output part of the micro motor 23 is fixedly connected with the center of the connecting frame 22, and the micro motor 23 is electrically connected to the photovoltaic power generation module 10, the backup battery 11 and the light sensing control module 12 respectively, and the micro motor 23 is fixedly installed on the bottom end of the mounting disk 6 through the support member 24, and the support member 24 is composed of support columns on all sides and a support disk at the bottom to achieve a stable installation of the micro motor 23. The light sensing control module 12 can sense the light conditions in real time, and can automatically control the micro motor 23 to start as the light conditions change. The micro motor 23 drives the eccentric rotating frame 20 to rotate, and through the limited sliding of the eccentric groove 21 and the sliding rod 18, the eccentric rotating frame 20 will drive the four sliding rods 18 to move closer or farther synchronously. The sliding rod 18 continues to drive the inner sleeve rod 9 to rotate along the mounting ring 7 through the transmission of the ball block 17, the ball shell 16, the push-pull rod 15, and the linkage frame 14 in turn, and the photovoltaic panel 8 rotates synchronously to enable it to fully receive light, thereby ensuring the power generation efficiency of the photovoltaic panel 8.

[0031] Meanwhile, the linkage assembly includes a mounting frame 25 detachably connected to the outside of the camera body 5, and shafts 26 are fixedly connected to the tops of both sides of the mounting frame 25, and the two shafts 26 are respectively rotatably connected to the inner sides of the corresponding tripods 4. One of the shafts 26 is located on the outer wall of the tripod 4 and is formed with protruding teeth 27, and the protruding teeth 27 are evenly distributed around the circumference, and the bottom of the protruding teeth 27 is meshed with a rack 28, and the top of the rack 28 is fixedly connected with a slide bar 29, and the two ends of the slide bar 29 are against the two adjacent sections of the connecting frame 22, and the bottom end of the mounting plate 6 is fixedly connected with a fixed slide seat 30, and the slide bar 29 is horizontally limited and slidable on the inner side of the fixed slide seat 30. When the eccentric rotating frame 20 rotates, the connecting frame 22 inside it rotates synchronously, and drives the slide bar 29 to translate along the fixed slide seat 30, and the rack 28 moves synchronously, and then drives the shaft rod 26 to rotate through the engagement between the bottom of the rack 28 and the protruding teeth 27, and the mounting frame 25 and the camera body 5 inside it rotate synchronously, that is, the shooting angle of the camera body 5 is synchronously adjusted as the lighting conditions change, so that the camera picture is clearer.

[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A field crop growth monitoring system based on low-altitude remote sensing, comprising an unmanned aerial vehicle (UAV) body (1), wherein four sets of propellers (3) are installed at four corners of the UAV body (1) through arms (2), and two tripods (4) are foldably installed at the bottom end of the UAV body (1), and a camera body (5) is detachably installed between the two tripods (4); characterized in that: A mounting plate (6) is fixedly mounted on the bottom end of the drone body (1), and photovoltaic panels (8) are rotatably mounted on the four sides of the mounting plate (6). A photovoltaic power generation module (10), a backup battery (11) and a light sensing control module (12) are respectively mounted inside the mounting plate (6), and the photovoltaic power generation modules (10), the backup battery (11) and the light sensing control module (12) are electrically connected in pairs. The four photovoltaic power generation panels (8) convert light energy into electrical energy that is concentrated in the photovoltaic power generation modules (10). The photovoltaic power generation modules (10) and the backup battery (11) supply power to the camera body (5), the light sensing control module (12) and other electrical components in turn. The four photovoltaic power generation panels (8) are connected to the mounting plate (6) via a flip assembly, and the camera body (5) is linked to the flip assembly via a linkage assembly, so that the photovoltaic power generation panels (8) and the camera body (5) can be synchronously rotated and adjusted as the light changes.

2. The field crop growth monitoring system based on low-altitude remote sensing according to claim 1 is characterized in that: The bottom of the mounting plate (6) is formed with mounting collars (7), and the inner side of the end of the photovoltaic panel (8) close to the mounting plate (6) is fixedly connected with inner sleeve rods (9), and the four inner sleeve rods (9) are rotatably sleeved on the inner sides of corresponding mounting collars (7).

3. The field crop growth monitoring system based on low-altitude remote sensing according to claim 2 is characterized in that: A charging hole (13) is provided at the bottom end of the mounting plate (6) at a position corresponding to the position below the backup battery (11), and the charging hole (13) overlaps with the charging port of the backup battery (11).

4. The field crop growth monitoring system based on low-altitude remote sensing according to claim 3 is characterized in that: The flip assembly comprises a linkage frame (14) fixedly connected to the lower part of the inner sleeve rod (9); a push-pull rod (15) is fixedly connected to the middle part of the bottom cross bar of the linkage frame (14); the end of the push-pull rod (15) is fixedly connected to a ball shell (16); a ball block (17) is movably sleeved inside the ball shell (16); a sliding rod (18) is fixedly connected to the top of the ball block (17); an eccentric rotating frame (20) is slidably sleeved on the outer sides of four sliding rods (18); a cross-shaped connecting frame (22) is fixedly connected to the inner side of the eccentric rotating frame (20); a micro motor (23) is fixedly installed at the bottom center of the mounting plate (6); and an output portion of the micro motor (23) is fixedly connected to the center of the connecting frame (22).

5. The field crop growth monitoring system based on low-altitude remote sensing according to claim 4 is characterized in that: A circle of limiting protrusions is formed on the top of the sliding rod (18), and limiting sliding grooves (19) are provided around the bottom end of the mounting plate (6). The top protrusions of the four sliding rods (18) slide in a limited manner on the inner side of the corresponding limiting sliding grooves (19).

6. The field crop growth monitoring system based on low-altitude remote sensing according to claim 5 is characterized in that: The eccentric rotating frame (20) is formed with convex plates on the four sides, and an eccentric groove (21) is formed on the convex plates. The eccentric groove (21) is an eccentrically arranged arc-shaped groove structure, and the four sliding rods (18) slide correspondingly on the inner side of the eccentric groove (21).

7. The field crop growth monitoring system based on low-altitude remote sensing according to claim 6 is characterized in that: The micro motor (23) is electrically connected to the photovoltaic power generation module (10), the backup battery (11) and the light sensing control module (12) respectively, and the micro motor (23) is fixedly mounted on the bottom end of the mounting plate (6) via a support member (24), wherein the support member (24) is composed of support columns on all sides and a support plate at the bottom.

8. The field crop growth monitoring system based on low-altitude remote sensing according to claim 7 is characterized in that: The linkage assembly comprises a mounting frame (25) detachably connected to the outside of the camera body (5), the tops of both sides of the mounting frame (25) are fixedly connected with shafts (26), the two shafts (26) are respectively rotatably connected to the inner sides of the corresponding tripods (4), the outer wall of one of the shafts (26) located on the outer side of the tripod (4) is formed with protruding teeth (27), the protruding teeth (27) are evenly distributed on the circumference, the bottom of the protruding teeth (27) is meshed with a rack (28), the top of the rack (28) is fixedly connected with a slide bar (29), the two ends of the slide bar (29) are against two adjacent sections of the connecting frame (22), the bottom end of the mounting plate (6) is fixedly connected with a fixed slide seat (30), and the slide bar (29) is horizontally limited and slidable on the inner side of the fixed slide seat (30).

9. The monitoring method of the field crop growth monitoring system based on low-altitude remote sensing according to claim 8 is characterized in that: The following steps are involved: S1. After the remote sensing drone takes off, it uses the camera body (5) to perform remote sensing photography of field crops. When the light is sufficient, the photovoltaic panel (8) is used to generate electricity to provide power for the camera body (5), the light sensing control module (12) and the micro motor (23). When the light conditions are poor and the power in the photovoltaic power generation module (10) is exhausted, the backup battery (11) is started to provide power. S2, the light sensing control module (12) senses the light conditions in real time, and automatically controls the micro motor (23) to start as the light conditions change, thereby driving the photovoltaic power generation panel (8) to rotate so that it can fully receive light; S3, adjusting the shooting angle of the camera body (5) by driving the camera body (5) to rotate; S4. The data storage module in the camera body (5) automatically stores the captured images and sends the image data to the data processing module of the central control system via wireless. The images are cut and processed in batches with high precision to achieve analysis and prediction of the growth of field crops.

Images