Device and method for simply detecting spatial distribution of fog drops of plant protection unmanned aerial vehicle in rice

Abstract

The invention provides a device and a method for simply detecting spatial distribution of fog drops of a plant protection unmanned aerial vehicle in rice, and belongs to the technical field of agriculture. After a proper flight path is selected in an investigation field, continuous marker posts are arranged in the vertical direction of the flight path of the plant protection unmanned aerial vehicle, and one marker post is arranged every 0.5 m by taking the flight path as the center according to the spraying width of the plant protection unmanned aerial vehicle. Height is selected according to the growth period of rice, one end of the round tube clamp of the double-end clamp clamps the corresponding scale mark post, and one end of the flat-end clamp clamps the test paper. The required chemical agent is dissolved in a developing solution with a proper volume, and the chemical agent is sprayed according to the operation of a conventional plant protection unmanned aerial vehicle. After the pesticide is applied, the test paper at each test point is collected immediately, the fog drop coverage, the fog drop density and the fog drop particle size are calculated through the fog drop scanning-calculator device, and the fog drop deposition condition at each test point is counted and analyzed. The method has the advantages of simplicity, high operability, high accuracy and low cost.

Description

TECHNICAL FIELD

[0001] The application provides a device and method for simply detecting spatial distribution of plant protection unmanned aerial vehicle droplets on rice, and belongs to the field of agricultural technology. BACKGROUND

[0002] With the development of agricultural mechanization and intelligentization, agricultural plant protection unmanned aerial vehicles have made great progress in rice chemical prevention and control in recent years. Agricultural plant protection unmanned aerial vehicles have the advantages of high efficiency, precise application and convenient operation, and have strong terrain adaptability. They can be used in plains and hilly areas to carry out pesticide application, realize man-machine separation operation, avoid pesticide poisoning, reduce labor intensity and labor cost, effectively improve operation efficiency, and achieve the purpose of reducing pesticide use, realizing precise and reduced pesticide application, and improving pesticide utilization rate. The spatial deposition of the droplets of the agricultural plant protection unmanned aerial vehicle on the target crop is closely related to its prevention and control effect. Detecting the deposition of the droplets of the agricultural plant protection unmanned aerial vehicle is of great significance for evaluating flight parameters, chemical agents and flight equipment for prevention and control effect.

[0003] Currently, the detection method generally uses water-sensitive test paper, which is not suitable for detection in the morning or evening with dew; and the water-sensitive test paper is expensive and has no installation device, and the detection process is complicated; in addition, the detection of the base of rice is easily affected by the water layer of the paddy field, which affects the accuracy of the results; finally, professional equipment is needed, which is not conducive to the development of related tests or detection by basic research units. SUMMARY

[0004] The application provides a device and method for simply and efficiently detecting spatial deposition of plant protection unmanned aerial vehicle droplets, which can simply detect the spatial deposition distribution of plant protection unmanned aerial vehicle droplets without using professional detection instruments and equipment, and has the advantage of low cost.

[0005] The specific technical solution is as follows:

[0006] The device for simply detecting spatial distribution of plant protection unmanned aerial vehicle droplets on rice comprises:

[0007] A marker is provided on the rod, and a length scale is marked on the rod to identify the height of the installation of the test paper.

[0008] A double-head clamp is provided, one end of which is a round pipe clamp clamped on the marker, and the other end is a flat head clamp clamping the test paper; the round pipe clamp and the flat head clamp are connected by a universal buckle to adjust the direction.

[0009] The method for simply detecting spatial distribution of plant protection unmanned aerial vehicle droplets on rice comprises the following steps:

[0010] Step 1: Insert the marker rod: After selecting the appropriate flight path in the survey field, set up a continuous marker rod in the vertical direction of the plant protection UAV flight path. According to the plant protection UAV spray width, set a marker rod every 0.5 m in the center of the flight path. At the same time, to avoid the marginal effect of the plant protection UAV, the marker point should be set within the uniform cruising path of the plant protection UAV.

[0011] Step 2: Set the height: After the marker rod is inserted, select the appropriate height according to the growth period of rice, and clamp one end of the double-head clamp to the corresponding scale marker. The height from the ground during the tillering stage is about 3-5 cm; the height from the ground during the tillering stage is about 5-10 cm; two heights can be set during the jointing stage, 5-10 cm from the ground and 10-15 cm from the top; three heights can be set during the heading stage, 5-10 cm from the ground, the middle height of the crop height, and 10-15 cm from the top.

[0012] Step 3: Install the test paper: After the double-head clamp is fixed on the marker rod, clamp the test paper with the flat end. Rotate the universal buckle so that the light surface (photosensitive surface) of the test paper faces upwards and the velvet surface faces downwards. When measuring the spatial deposition of droplets at different heights on one marker rod, adjust the double-head clamp to make the test papers at different heights face different directions to avoid the upper test paper blocking the lower test paper.

[0013] Step 4: Prepare the color developing solution: Dilute the color developing mother liquor with clean water at a ratio of 1:500 to prepare the color developing solution for plant protection UAV spraying.

[0014] Step 5: Apply the pesticide: Dissolve the required chemical agent in the appropriate volume of color developing solution and apply it by following the conventional plant protection UAV operation.

[0015] Step 6: Collect the test paper: Immediately collect the test paper from each test point after the plant protection UAV application.

[0016] Step 7: Calculate the droplet distribution: Bring the collected test paper back to the room and use the droplet scanning-calculator device to calculate the droplet coverage, droplet density, and droplet size, and statistically analyze the droplet deposition at each test point.

[0017] Droplet coverage (VC) is defined as the ratio of the colored area of the droplet color developing solution on the test paper to the entire test paper area; its calculation formula is:

[0018]

[0019] wherein is the correction coefficient, PI b is the test paper color value

[0020] Droplet density (DD) is defined as the number of colored spots per unit area (1 cm 2 ) on the test paper;

[0021] Droplet size (DS) is defined as the diameter of the spot of the droplet color developing liquid attached to the test paper, and the diameter of the droplet sphere in the air after the non-droplet is sprayed by the plant protection unmanned plane; its calculation formula is:

[0022] DS = VC / (DD x π)

[0023] Wherein, VC is the coverage, and DD is the droplet density.

[0024] The device and method have the advantages of simplicity, strong operability, high accuracy and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The device structure diagram of the present application;

[0026] Figure 2 The droplet scanning-calculator of the present application. DETAILED DESCRIPTION

[0027] As shown in the simple device for detecting the spatial distribution of the plant protection unmanned plane droplets in rice. It comprises: Figure 1 Marker 100: PVC pipe with a diameter of 16 mm (20 mm and 25 mm are also available), about 1.2 m-1.5 m long, with length scale on the pipe wall for easy identification of test paper 300 height.

[0028] Double-head clamp 200: one end is a round pipe clamp to hold the marker 100; the other end is a flat head clamp to hold the test paper 300; the round pipe clamp and the flat head clamp are connected by a universal buckle to adjust the direction.

[0029] Test paper 300: ordinary glossy photo paper, size 5.5 cm x 8.4 cm.

[0030] Color developing mother liquor: color developing mother liquor is prepared with lemon yellow: bright blue: water = 5.8:1.4:100 ratio for subsequent use.

[0031] The method for simply detecting the spatial distribution of the plant protection unmanned plane droplets in rice comprises the following steps:

[0032] Step 1: Insert the marker 100: After selecting the appropriate flight path in the survey field, set up continuous markers 100 in the vertical direction of the plant protection unmanned plane flight path, and set up a marker 100 every 0.5 m according to the spraying width of the plant protection unmanned plane, with the flight path as the center. At the same time, in order to avoid the marginal effect of the plant protection unmanned plane, the marker 100 point should be set in the uniform cruising path of the plant protection unmanned plane.

[0033]

[0034] ​Step Six: Determine the Height: After inserting the marker pole 100, select an appropriate height based on the rice's growth stage. Clamp one end of the round tube clamp of the double-ended clamp 200 onto the corresponding graduated marker pole 100. During the rice's tillering stage, the height from the ground is approximately 3-5cm; during the tillering stage, it is approximately 5-10cm; during the jointing stage, two heights can be set: 5-10cm from the ground and 10-15cm from the top; during the heading stage, three heights can be set: 5-10cm from the ground, the middle height of the crop, and 10-15cm from the top.

[0035] Step 3: Loading Test Strips 300: After fixing the double-ended clip 200 to the scale rod 100, clamp one end of the flat-ended clip onto the test strip 300. Rotate the universal joint so that the smooth side (photosensitive side) of the test strip 300 faces upwards and the textured side faces downwards. When measuring droplet deposition at different heights on a single scale, adjust the round tube clamp of the double-ended clip 200 so that the test strips 300 at different heights face different directions to prevent the upper layer of test strips 300 from obstructing the lower layer.

[0036] Step 4: Prepare the color developing solution: Dilute the color developing stock solution with clean water at a ratio of 1:500 to prepare the color developing solution for use by agricultural drones.

[0037] Step 5: Apply pesticide: Dissolve the required chemical agent in an appropriate volume of color-developing solution and spray the pesticide using a conventional agricultural drone.

[0038] Step 6: Collect 300 test strips: After the agricultural drone applies pesticides, immediately collect 300 test strips from each test site.

[0039] Step 7: Droplet Distribution Calculation: Bring the collected test strips (300) back indoors and calculate the droplet distribution using methods such as... Figure 2 The droplet scanning-calculator device shown calculates droplet coverage, droplet density, and droplet size, and statistically analyzes droplet deposition at each test point.

[0040] The specific operation is as follows: Press and hold the power button for 23 seconds. After the droplet calculator is turned on, open the scanning area panel 5 and proceed with the blank test paper 300. Coefficient correction, according to Correction key 6. Correction After scanning, place the collected test strips 300 into the scanning area 5, close the panel, and press the confirmation button 3. The display screen 1 will then show the droplet coverage, droplet density, and droplet size. Press the cancel button 4, and the data will be automatically saved to the memory card 7. The next scan of test strips 300 can then be performed. After all test strips 300 have been scanned, press and hold the power button 2 to turn off the machine, then remove the memory card 7 to retrieve the test data via a computer.

[0041] Droplet coverage (VC) is defined as the ratio of the area stained by the droplet colorimetric solution on test paper 300 to the total area of ​​test paper 300; its calculation formula is:

[0042]

[0043] wherein is a correction factor, PI b is the coloration value of the test paper 300.

[0044] The droplet density (DD) is defined as the number of colored spots per unit area (1 cm 2 ) of the test paper 300;

[0045] The droplet size (DS) is defined as the diameter of the spot to which the droplet coloration solution adheres to the test paper 300;

[0046] The non-droplet aerial droplet sphere diameter after being sprayed by the plant protection unmanned aerial vehicle; the calculation formula is:

[0047] DS = VC / (DD x π)

[0048] wherein VC is the coverage, and DD is the droplet density.

[0049] Example 1: Detection of the spatial distribution of the plant protection unmanned aerial vehicle droplets in the tillering stage of rice

[0050] The plant protection unmanned aerial vehicle model is DJI T40P, the spraying width is set to 6 m, the flight route is taken as the central axis, the left and right sides are spaced 0.5 m apart, and a flagpole is inserted 100 m away from the take-off point at a distance of 25 m. The rice is in the tillering stage, and only one height is investigated in this detection. The round tube clamp of the double-head clamp 200 is clamped at a distance of 5 cm from the ground, and the flat-head clamp clamps the 5.5 cm x 8.4 cm test paper 300, ensuring that the light surface of the test paper 300 faces upwards. The coloration mother liquor is prepared in a ratio of lemon yellow: bright blue: water = 5.8: 1.4: 100, and then diluted with clean water at a ratio of 1:500 to obtain the coloration solution. The coloration solution and the chemical agent are added to the plant protection unmanned aerial vehicle tank for spraying. After the spraying is completed, the test papers 300 are collected, the colored area and the blank area of the test paper 300 are counted by the transparent grid paper method, and the droplet deposition conditions of each monitoring point are shown in Table 1.

[0051] Table 1: Spatial distribution of the plant protection unmanned aerial vehicle droplets in the tillering stage of rice

[0052]

[0053]

[0054] As can be seen from Table 1, when the DJI T40P is used for spraying in the tillering stage of rice, the spatial distribution of the liquid droplets is centered on the central axis of the flight route, and gradually decreases towards the two wings.

[0055] Example 2: Detection of the spatial distribution of the plant protection unmanned aerial vehicle droplets in the full-bloom stage of rice

[0056] The plant protection unmanned aerial vehicle model is DJI T40P, the spraying width is set to 6 m, and the flagpole 100 is inserted at a distance of 25 m from the take-off point with the flight route as the central axis, and the left and right sides are spaced 0.5 m apart. The rice is at the heading stage, and the detection survey is conducted at two heights, the upper height is 15 cm from the top of the leaf surface, and the lower height is 10 cm from the ground. The round pipe clamp of the double-head clamp 200 is clamped at the corresponding scale on the flagpole 100, the flat clamp clamps the test paper 300 of 5.5 cm x 8.4 cm, ensures that the light surface of the test paper 300 faces upwards, adjusts the round pipe clamp of the double-head clamp 200 to make the test paper 300 at different heights face different directions, and avoids the upper test paper 300 from blocking the lower test paper 300. Lemon yellow: bright blue: water = 5.8:1.4:100 ratio to configure the color developing mother liquor, then dilute it to 1:500 with clean water as the color developing liquid, then add the color developing liquid and the chemical agent to the plant protection unmanned aerial vehicle tank for spraying. After spraying, collect each test paper 300, and count the colored area and blank area of the test paper 300 by the transparent grid paper method, and the droplet deposition situation of each monitoring point is shown in Table 2.

[0057] Table 2: Spatial distribution of plant protection unmanned aerial vehicle droplets on rice at the heading stage

[0058]

[0059]

[0060] As can be seen from Table 2, when DJI T40P is used for spraying at the heading stage of rice, the spatial distribution of droplets in the vertical direction is that the amount of pesticide liquid on the upper part of the rice is greater than the basic amount of pesticide liquid, and in the horizontal direction, the spatial distribution of droplets gradually decreases towards both wings from the central axis of the route.

Claims

1. A simple device for detecting the spatial distribution of droplets from an agricultural drone in rice paddies, characterized in that, include: A marker (100) with length markings on its shaft to indicate the height at which the test strip (300) is installed; The double-ended clamp (200) has a round tube clamp on one end, which clamps onto the marker (100); and a flat clamp on the other end, which clamps onto the test paper (300). The round tube clamp and the flat clamp are connected by a universal buckle to adjust the direction.

2. A simplified method for detecting the spatial distribution of droplets from agricultural drones in rice paddies, characterized in that, The device for detecting the spatial distribution of droplets from an agricultural drone in rice paddies, as described in claim 1, comprises the following steps: Step 1: Inserting markers (100): After selecting the flight path in the surveyed field, set up continuous markers (100) in the vertical direction of the plant protection drone's flight path. According to the spray width of the plant protection drone, set up a marker (100) every 0.5m with the flight path as the center; the markers (100) are set within the uniform cruising path of the plant protection drone. Step 2: Determine the height: After the marker (100) is inserted, select the height according to the rice growth period, and clamp one end of the round tube clamp of the double-headed clamp (200) onto the corresponding scale marker (100); Step 3: Loading test strips (300): After the double-ended clamp (200) is fixed on the scale rod (100), clamp the test strip (300) with one end of the flat-ended clamp; rotate the universal buckle so that the photosensitive side of the test strip (300) faces upward; when measuring the spatial deposition of droplets at different heights on a scale, adjust the round tube clamp of the double-ended clamp (200) so that the test strips (300) at different heights face different directions to avoid the upper test strip (300) blocking the lower test strip (300); Step 4: Prepare the color development solution: Dilute the color development stock solution with clean water at a volume ratio of 1:500 to prepare the color development solution for use by agricultural drones. Step 5: Application: Dissolve the required chemical agent in the colorimetric solution and spray it using a conventional agricultural drone. Step 6: Collect test strips (300): After the agricultural drone applies pesticides, immediately collect test strips (300) from each test site; Step 7: Droplet distribution calculation: Bring the collected test strips (300) back indoors, calculate the droplet coverage, droplet density and droplet size using the droplet scanning-calculator device, and statistically analyze the droplet deposition at each test point.

3. The method for easily detecting the spatial distribution of droplets from an agricultural drone in rice paddies according to claim 2, characterized in that, In step 2, the height of the double-headed clamp (200) is: The height of rice plants from the ground during the upright growth stage is 3-5 cm. During the tillering stage, the tillering height is 5-10 cm from the ground. During the jointing stage, two heights are set: 5-10cm from the ground and 10-15cm from the top. Three heights are set at the heading stage: 5-10cm from the ground, the middle height of the crop plant, and 10-15cm from the top.

4. The method for easily detecting the spatial distribution of droplets from an agricultural drone in rice paddies according to claim 2, characterized in that, In step 7, the droplet coverage VC is defined as the ratio of the area stained by the droplet colorimetric solution on the test paper (300) to the total area of ​​the test paper (300); its calculation formula is: in PI is a correction factor. b The coloring value of the test strip (300); The droplet density DD is defined as the density of droplets per unit area (cm²) of the test paper (300). 2 The number of stained spots; The droplet size DS is defined as the diameter of the spot on the test paper 300 mm thick where the droplet colorimetric solution adheres. The diameter of the aerial droplet spheres after non-droplet spraying by agricultural drones; its calculation formula is: DS = VC / (DD × π) Where VC is coverage and DD is droplet density.

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