A canopy density detection device for farmland shelterbelt

Abstract

This invention relates to a canopy density detection device for farmland shelterbelts, applicable to the field of detection. It uses a photosphere as a light source, which is moved to different positions within the canopy. The emitted light is blocked by canopy layers at varying heights. Based on the intensity of the light captured by an optical sensor, the density at different canopy positions can be obtained. Compared to traditional methods relying on natural light, this device provides better density data at different canopy locations, significantly improving the ability to identify the multi-layered, three-dimensional structure of the canopy. This effectively enhances the diversity of canopy data and is more conducive to analyzing the canopy's growth status. Furthermore, the adjustable nozzle angle allows the photosphere to fall sequentially over the canopy, penetrating dense canopies during its descent for detection. This solves the problem of photosphere obstruction in high-density canopies, enhancing the device's adaptability to complex forest conditions and increasing its practicality.

Description

Technical Field

[0001] This invention relates to a density detection device, and more particularly to a canopy density detection device for farmland shelterbelts used in the field of detection. Background Technology

[0002] The canopy analyzer collects light radiation data from the canopy through optical sensors and calculates parameters such as leaf area index, canopy porosity, and light transmittance using the amount of light transmitted through the canopy.

[0003] Chinese patent CN204329907U discloses a crop canopy analyzer that captures images of the canopy using a hemispherical sensor and transmits the images to a computing device to calculate the canopy density. Chinese patent CN222298755U discloses a portable device for a plant canopy analyzer that acquires plant canopy images using a fisheye lens and an image acquisition device, and analyzes the canopy density using the analyzer's dedicated analysis software.

[0004] All of the aforementioned patent applications use a handheld optical sensor to photograph the canopy from below, and obtain the density of the canopy by measuring the area of ​​natural light passing through it. However, the height and brightness of the natural light cannot be adjusted, making it impossible for the optical sensor to obtain the density at different locations of the canopy. Therefore, further improvements are needed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing technology obtains the density of the canopy by the area of ​​natural light passing through the canopy, but the height and brightness of the natural light cannot be adjusted, so the optical sensor cannot obtain the density at different locations of the canopy.

[0006] To address the aforementioned problems, this invention provides a canopy density detection device for farmland shelterbelts, comprising a lighting module and a shooting module. The lighting module includes a connecting box, an air cylinder fixedly connected to the side wall of the connecting box, a nozzle fixedly connected to the top of the connecting box, a light sphere placed inside the nozzle, a piston slidably connected to the inner wall of the air cylinder, an iron plate fixedly connected to the side wall of the piston, an elastic rope fixedly connected between one end of the piston and one end of the air cylinder, an electric telescopic rod fixedly connected to one end of the air cylinder, the output end of the electric telescopic rod being located inside the air cylinder and fixedly connected to an electromagnet, an air inlet pipe fixedly connected to the other end of the air cylinder, and a one-way air valve fixedly connected to one end of the air inlet pipe. The shooting module includes a support, on which an optical sensor is mounted.

[0007] As a further improvement of this application, an outer shaft is rotatably connected to the middle of the support, the optical sensor is fixedly connected to the outer shaft, and an inner shaft is installed in the middle of the connecting box.

[0008] As a further improvement of this application, a rope reel is fixedly connected to the outer wall of the inner shaft, a limit wheel is installed near the inner wall of the nozzle in the connecting box, a linkage rope is wound on the rope reel, one end of the linkage rope is fixedly connected to the light ball, and the linkage rope and the limit wheel are connected by a transmission.

[0009] As a further improvement of this application, one end of the inner shaft extends to the outside of the connecting box and is fixedly connected to a drive wheel, and one end of the connecting box is fixedly connected to a winding motor, the output end of the winding motor being fixedly connected to one end of the inner shaft.

[0010] As another improvement of this application, one end of the support is rotatably connected to an intermediate shaft, and one end of the intermediate shaft is fixedly connected to a pinion and a driven wheel.

[0011] As a further improvement to this application, one end of the outer shaft extends to the outside of the support and is fixedly connected to a large gear, the small gear meshes with the large gear, and a transmission belt rotatably connects the driving wheel and the driven wheel.

[0012] As a further improvement to this application, the light sphere includes an electric sphere and a light homogenizing layer. The electric sphere is located inside the light homogenizing layer, and multiple uniformly distributed light sources are fixedly connected to the surface of the electric sphere. Multiple uniformly distributed buffer springs are fixedly connected between the electric sphere and the light homogenizing layer.

[0013] As another improvement of this application, the nozzle and the connecting box are fixedly connected by a connecting hose, and an angle adjustment shaft is rotatably connected through the top of the connecting box. An angle drive motor and an angle sensor are fixedly connected to both sides of the top of the connecting box, respectively.

[0014] As another improvement of this application, one end of the drive angle motor and one end of the angle sensor are respectively fixedly connected to both ends of the angle adjustment shaft, and connecting rods are respectively fixedly connected to both ends of the angle adjustment shaft. The top end of the connecting rod is fixedly connected to the nozzle, and a positioning module is installed inside the light sphere.

[0015] As another improvement of this application, the support and the optical sensor are fixedly connected by a positioning and tracking gimbal, and the positioning and tracking gimbal is electrically connected to the positioning module.

[0016] In summary, this invention uses a light sphere as a light source and, through the arrangement of devices such as nozzles, allows the light sphere to move to different positions within the canopy. As the light sphere moves to different heights within the canopy, the emitted light is blocked by the canopy at varying heights. Based on the intensity of the light in the image captured by the optical sensor, the density of the canopy at different locations can be obtained. Compared to traditional methods relying on natural light, this invention provides a better way to obtain the density of the canopy at different locations, significantly improving the ability to identify the multi-layered, three-dimensional structure of the canopy, effectively enhancing the diversity of canopy data, and making it more conducive to analyzing the growth status of the canopy.

[0017] Furthermore, by adjusting the nozzle angle, the photospheres fall sequentially over the canopy, allowing them to penetrate dense canopies for detection during their descent. This solves the problem of photospheres being easily obstructed in high-density canopies, enhances the device's adaptability to complex forest conditions, and increases its practicality. Attached Figure Description

[0018] Figure 1 This is a front cross-sectional view of the connection between the box and the air cylinder in the first embodiment of this application;

[0019] Figure 2 This is a top sectional view of the connection box and the support in the first embodiment of this application;

[0020] Figure 3 This is a frontal cross-sectional view of the photosphere in the first embodiment of this application;

[0021] Figure 4 This is a trajectory diagram of the photosphere passing through the canopy from below in the first embodiment of this application;

[0022] Figure 5 This is a front cross-sectional view of the nozzle in the second embodiment of this application;

[0023] Figure 6 This is a perspective view of the connection hose in the second embodiment of this application;

[0024] Figure 7 This is a side cross-sectional view of the angle adjustment axis in the second embodiment of this application;

[0025] Figure 8 This is a trajectory diagram of the photosphere passing through the canopy from above in the second embodiment of this application.

[0026] Description of the numbers in the figure:

[0027] 1. Connecting box; 101. Air cylinder; 102. Inner shaft; 103. Nozzle; 104. Light ball; 105. Linkage rope; 106. Electric telescopic rod; 107. Electromagnet; 108. Piston; 109. Elastic rope; 110. Iron sheet; 111. Air inlet pipe; 112. One-way air valve; 113. Rope reel; 114. Limit wheel; 115. Drive wheel; 116. Rewinding motor; 117. Connecting... 1. Connecting hose; 118. Angle adjustment shaft; 119. Drive motor; 120. Angle sensor; 121. Connecting rod; 2. Support; 201. Outer shaft; 202. Optical sensor; 203. Intermediate shaft; 204. Pinion; 205. Gear; 206. Driven wheel; 3. Transmission belt; 4. Electromagnet; 401. Light-diffusing layer; 402. Light source; 403. Buffer spring; 5. Positioning and tracking gimbal. Detailed Implementation

[0028] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0029] The first implementation method:

[0030] Figure 1-Figure 4 A canopy density detection device for farmland shelterbelts is shown, comprising a light-illuminating module and a shooting module. The light-illuminating module includes a connecting box 1, an air cylinder 101 fixedly connected to the side wall of the connecting box 1, a nozzle 103 fixedly connected to the top of the connecting box 1, a light ball 104 placed inside the nozzle 103, a piston 108 slidably connected to the inner wall of the air cylinder 101, an iron sheet 110 fixedly connected to the side wall of the piston 108, an elastic rope 109 fixedly connected between one end of the piston 108 and one end of the air cylinder 101, an electric telescopic rod 106 fixedly connected to one end of the air cylinder 101, the output end of the electric telescopic rod 106 located inside the air cylinder 101 and fixedly connected to an electromagnet 107, an air inlet pipe 111 fixedly connected to the other end of the air cylinder 101, and a one-way air valve 112 fixedly connected to one end of the air inlet pipe 111. The shooting module includes a support 2, on which an optical sensor 202 is mounted.

[0031] In use, the illumination module and camera module are installed on the lower side of the canopy, and the light sphere 104 is activated to emit light. Then, the electric telescopic rod 106 is activated to move to the right, at which point the electromagnet 107 and the iron plate 110 are in contact. Then, the electromagnet 107 is activated to attract the iron plate 110, and the electric telescopic rod 106 is activated to move to the left. Under the action of the electromagnet 107 and the iron plate 110, the piston 108 moves to the left synchronously with the output end of the electric telescopic rod 106. When the piston 108 moves to the left, the space outside its... Air enters the air cylinder 101 through the air inlet pipe 111. During this process, the elastic rope 109 has elastic potential energy. At this time, the electromagnet 107 is closed to separate it from the iron plate 110. Under the action of the elastic rope 109, the piston 108 moves rapidly to the right, which compresses the air inside the connecting box 1 and the air cylinder 101, pushing the light ball 104 out of the nozzle 103. By controlling the distance the piston 108 moves to the left, the ejection height of the light ball 104 can be controlled.

[0032] After the light sphere 104 is ejected, it moves to different positions in the canopy and then falls. During this process, the outer shaft 201 drives the optical sensor 202 to rotate, so that the optical sensor 202 follows the movement of the light sphere 104 to take continuous pictures. After the light sphere 104 moves to different heights of the canopy, the light emitted by it is blocked by the canopy at different heights. Based on the intensity of the light in the picture captured by the optical sensor 202, the density of different positions of the canopy can be obtained. Compared with traditional single density detection, it can better obtain the state of the tree canopy.

[0033] An outer shaft 201 is rotatably connected to the middle of the support 2. An optical sensor 202 is fixedly connected to the outer shaft 201. An inner shaft 102 is installed in the middle of the connecting box 1. A rope reel 113 is fixedly connected to the outer wall of the inner shaft 102. A limit wheel 114 is installed on the inner wall of the connecting box 1 near the nozzle 103. A linkage rope 105 is wound on the rope reel 113. One end of the linkage rope 105 is fixedly connected to the light ball 104. The linkage rope 105 and the limit wheel 114 are connected in a transmission manner. One end of the inner shaft 102 extends to the outside of the connecting box 1 and is fixedly connected to a drive wheel 115. A winding motor 116 is fixedly connected to one end of the connecting box 1. The output end of the winding motor 116 is fixedly connected to one end of the inner shaft 102.

[0034] With the above settings, the winding motor 116 does not have a self-locking function. Therefore, when the light ball 104 is ejected from the inside of the nozzle 103, the winding motor 116 will not restrict the rise of the light ball 104. After the light ball 104 lands, the winding motor 116 can be started to drive the linkage rope 105 to wind up, so that the light ball 104 is returned to the inside of the nozzle 103.

[0035] One end of the support 2 is rotatably connected to an intermediate shaft 203. One end of the intermediate shaft 203 is fixedly connected to a pinion 204 and a driven wheel 206. One end of the outer shaft 201 extends to the outside of the support 2 and is fixedly connected to a large gear 205. The pinion 204 and the large gear 205 mesh with each other. A transmission belt 3 is rotatably connected between the drive wheel 115 and the driven wheel 206.

[0036] When the photosphere 104 is ejected from the inside of the nozzle 103, the linkage rope 105 drives the rope disc 113 to rotate. When the rope disc 113 rotates, it synchronously drives the inner shaft 102 to rotate. When the inner shaft 102 rotates, it drives the optical sensor 202 to rotate through the transmission belt 3, the small gear 204 and the large gear 205. The rotation angle of the optical sensor 202 is aligned with the photosphere 104. Through the above settings, the photosphere 104 can synchronously drive the optical sensor 202 to rotate when it rises, so that the optical sensor 202 can be aligned with the photosphere 104 to take pictures, thereby improving the accuracy of canopy detection.

[0037] The second implementation method:

[0038] Figure 5-Figure 8 The present invention discloses a canopy density detection device for farmland shelterbelts. Unlike the first embodiment, the photosphere 104 includes an electric sphere 4 and a light-diffusing layer 401. The electric sphere 4 is located inside the light-diffusing layer 401. A plurality of uniformly distributed light sources 402 are fixedly connected to the surface of the electric sphere 4. A plurality of uniformly distributed buffer springs 403 are fixedly connected between the electric sphere 4 and the light-diffusing layer 401.

[0039] With the above settings, the light emitted by the light source 402 can be evenly diffused outward through the light-diffusing layer 401, and the buffer spring 403 can buffer the light-diffusing layer 401 when it lands.

[0040] The nozzle 103 and the connecting box 1 are fixedly connected by a connecting hose 117. An angle adjustment shaft 118 is rotatably connected through the top of the connecting box 1. An angle drive motor 119 and an angle sensor 120 are fixedly connected to the two sides of the top of the connecting box 1, respectively. One end of the angle drive motor 119 and one end of the angle sensor 120 are fixedly connected to the two ends of the angle adjustment shaft 118, respectively. A connecting rod 121 is fixedly connected to the two ends of the angle adjustment shaft 118, respectively. The top end of the connecting rod 121 is fixedly connected to the nozzle 103. A positioning module is installed inside the light ball 104.

[0041] In use, the illumination module can be installed on the outside of the canopy, and the imaging module on the inside. The emission angle of the photosphere 104 can be adjusted to change its descent position within the canopy. For example, if the descent point of the photosphere 104 is set to the apex of the canopy, it will pass through different positions of the canopy sequentially during its descent. Similarly, the descent point of the photosphere 104 at different positions within the canopy can be adjusted, allowing for more complete detection of different positions within the canopy during its descent. With the above configuration, in cases of dense canopies, the first implementation method might prevent the photosphere 104 from penetrating the canopy. This implementation method, however, allows the photosphere 104 to pass through the canopy sequentially during its descent, making it suitable for dense canopy conditions.

[0042] The support 2 and the optical sensor 202 are fixedly connected by the positioning and tracking gimbal 5, and the positioning and tracking gimbal 5 is electrically connected to the positioning module.

[0043] In this embodiment, since the light ball 104 needs to pass through the canopy during its descent, in order to prevent the linkage rope 105 from getting tangled in the canopy, the positioning and tracking gimbal 5 is used to track the position of the light ball 104.

[0044] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A canopy density detection device for farmland shelterbelts, comprising a light module and a shooting module, characterized in that: The illumination module includes a connecting box (1), an air cylinder (101) is fixedly connected to the side wall of the connecting box (1), a nozzle (103) is fixedly connected to the top of the connecting box (1), a light sphere (104) is placed inside the nozzle (103), a piston (108) is slidably connected to the inner wall of the air cylinder (101), an iron plate (110) is fixedly connected to the side wall of the piston (108), and a fixed connection is made between one end of the piston (108) and one end of the air cylinder (101). The elastic rope (109) is fixedly connected to one end of the air cylinder (101) with an electric telescopic rod (106). The output end of the electric telescopic rod (106) is located inside the air cylinder (101) and is fixedly connected to an electromagnet (107). The other end of the air cylinder (101) is fixedly connected to an air inlet pipe (111). One end of the air inlet pipe (111) is fixedly connected to a one-way air valve (112). The shooting module includes a support (2) and an optical sensor (202) is installed on the support (2).

2. The canopy density detection device for farmland shelterbelts according to claim 1, characterized in that: The support (2) is rotatably connected to an outer shaft (201) in the middle, the optical sensor (202) is fixedly connected to the outer shaft (201), and the connecting box (1) is equipped with an inner shaft (102) in the middle.

3. The canopy density detection device for farmland shelterbelts according to claim 2, characterized in that: A rope reel (113) is fixedly connected to the outer wall of the inner shaft (102). A limit wheel (114) is installed on the inner wall of the connecting box (1) near the nozzle (103). A linkage rope (105) is wound on the rope reel (113). One end of the linkage rope (105) is fixedly connected to the light ball (104). The linkage rope (105) and the limit wheel (114) are connected in a transmission manner.

4. The canopy density detection device for farmland shelterbelts according to claim 3, characterized in that: One end of the inner shaft (102) extends to the outside of the connecting box (1) and is fixedly connected to a drive wheel (115). One end of the connecting box (1) is fixedly connected to a winding motor (116), and the output end of the winding motor (116) is fixedly connected to one end of the inner shaft (102).

5. The canopy density detection device for farmland shelterbelts according to claim 4, characterized in that: One end of the support (2) is rotatably connected to an intermediate shaft (203), and one end of the intermediate shaft (203) is fixedly connected to a pinion (204) and a driven wheel (206).

6. The canopy density detection device for farmland shelterbelts according to claim 5, characterized in that: One end of the outer shaft (201) extends to the outside of the support (2) and is fixedly connected to a large gear (205). The small gear (204) meshes with the large gear (205). A transmission belt (3) is rotatably connected between the drive wheel (115) and the driven wheel (206).

7. The canopy density detection device for farmland shelterbelts according to claim 1, characterized in that: The light sphere (104) includes an electric sphere (4) and a light-diffusing layer (401). The electric sphere (4) is located inside the light-diffusing layer (401). A plurality of uniformly distributed light sources (402) are fixedly connected to the surface of the electric sphere (4). A plurality of uniformly distributed buffer springs (403) are fixedly connected between the electric sphere (4) and the light-diffusing layer (401).

8. The canopy density detection device for farmland shelterbelts according to claim 1, characterized in that: The nozzle (103) and the connecting box (1) are fixedly connected by a connecting hose (117). An angle adjustment shaft (118) is rotatably connected through the top of the connecting box (1). An angle drive motor (119) and an angle sensor (120) are fixedly connected to the two sides of the top of the connecting box (1), respectively.

9. A canopy density detection device for farmland shelterbelts according to claim 8, characterized in that: One end of the drive angle motor (119) and one end of the angle sensor (120) are respectively fixedly connected to both ends of the angle adjustment shaft (118). Both ends of the angle adjustment shaft (118) are respectively fixedly connected to connecting rods (121). The top end of the connecting rod (121) is fixedly connected to the nozzle (103). The positioning module is installed inside the light sphere (104).

10. A canopy density detection device for farmland shelterbelts according to claim 9, characterized in that: The support (2) and the optical sensor (202) are fixedly connected by a positioning and tracking gimbal (5), which is electrically connected to the positioning module.

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