An online detection system for spray deposition parameters based on the principle of light propagation

Abstract

This invention discloses an online detection system for spray deposition parameters based on the principle of light propagation, relating to the field of intelligent agricultural detection. The system comprises a droplet collection plate, a shadow generation device, an image acquisition device, an image data transmission module, a wireless networking module, a wireless gateway module, a power supply module, a display processing module, and a support frame. The system can rapidly detect and evaluate spray deposition parameters independently of the color of the liquid solution. This system reduces the workload of traditional spray deposition parameter measurement and avoids the drawbacks of traditional imaging methods for measuring spray deposition parameters, providing a solution for rapid detection of spray deposition parameters.

Description

Technical Field

[0001] The present invention relates to the field of intelligent agricultural detection, and in particular to an online detection system for spray deposition parameters based on the principle of light propagation. Background Art

[0002] In agricultural planting, chemical pesticides are predominantly used for crop protection. Excessive or insufficient application of chemical pesticides can lead to problems. Measuring pesticide droplet deposition parameters can evaluate spray quality and provide effective feedback for improving and adjusting equipment. Therefore, measuring spray deposition parameters is of great significance to crop protection operations.

[0003] Currently, imaging is a common method for measuring spray deposition parameters. This includes the use of water-sensitive paper and the addition of pigments. The water-sensitive paper method suffers from long measurement cycles, high workload, and high costs. The addition of pigments creates a color difference between the spray droplets and the background, and the image is then collected and processed. This can alter certain spray characteristics, leading to inaccurate deposition parameter measurements. Furthermore, the measurement is affected by the external environment. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides an online detection system and method for spray deposition parameters based on the principle of light propagation. By combining wireless networks with image processing methods, the system realizes online detection and evaluation of spray deposition parameters: droplet deposition density, droplet coverage area, and droplet deposition amount. When measuring the droplet deposition parameters of the liquid medicine, no pigment needs to be added. The system can directly realize online measurement of the droplet deposition parameters and can be reused, which greatly reduces the measurement cost.

[0005] The present invention achieves the above technical objectives through the following technical means.

[0006] A spray deposition parameter online detection system based on the principle of light propagation includes a droplet collection plate, a shadow generating device, an image acquisition device, an image data transmission device, a wireless networking module, a wireless gateway module, a power supply module, a display processing module and a support frame; during spraying operation, the droplet collection plate is used to collect droplets to be detected; the shadow generating device is used to make the droplets on the droplet collection plate produce corresponding shadows; the image acquisition device is used to collect the generated droplet shadow images; the image data transmission device is used to establish a collection wireless local area network and realize the transmission of image data; the wireless gateway module is used to upload the collected image data to the display processing module; the power supply module is connected to the droplet collection plate, the shadow generating device, the image acquisition device, the image data transmission device and the wireless gateway module; the display processing module is used for setting image processing parameters, storing and processing data, and sending instructions to the wireless gateway module; the support frame is used to arrange collection points of the data collection local area network to realize spray deposition parameter measurement.

[0007] In the above scheme, the shadow generating device generates corresponding shadows of the droplets on the droplet collecting plate based on the propagation principle of light. By processing the droplet shadow image, the droplet deposition parameter information of the droplet collecting plate can be obtained. The droplet deposition parameters on the droplet collecting plate, including the number of droplets and the droplet coverage area, are obtained by the following formula:

[0008] NZ1=AZ2

[0009] k=f(h)

[0010] S 1i =k×S 2i

[0011] Among them, N Z1 is the number of droplets on the droplet collection plate, N Z2 is the number of fog droplets on the fog droplet shadow image, S 1i is the droplet coverage area on the droplet collection plate, S 2i is the coverage area of ​​the droplet on the droplet shadow image, h is the vertical distance from the droplet collection plate to the imaging paper, and k is a function of h;

[0012] Based on the obtained droplet coverage area on the droplet collection plate and the spherical cap and volume formula, the droplet deposition amount (m) on the droplet collection plate can be calculated by the following formula:

[0013]

[0014] m=ρ×V Z1

[0015] Where ρ is the liquid density, V Z1Droplet deposition volume, k2 = f(θ), θ is the contact angle between the droplet and the droplet collection plate surface, k2 is a function of θ, S 11 , S 12 ,...,S 1i ,...S 1n It is the spreading area of ​​the droplets on the droplet collection plate.

[0016] In the above scheme, the display processing module realizes the processing and storage of the collected data; in the processing of the collected data, there are automatic mode and manual mode for the sampling area selection; automatic mode: after setting the parameters, the sampling area is automatically selected according to the collected and transmitted image data; the number of area sampling areas i and the area sampling threshold are set S is the area of ​​the droplet collection plate, the target locking value t i is the target locking value of the i-th area sampling area. The display processing module will select the area sampling area based on the Δt approach principle. S ti is the droplet coverage area in the i-th area sampling area; spray deposition density N i is the number of droplets in the i-th sampling area, and the coverage rate per unit area of ​​spray deposition Mass per unit area of ​​spray deposition m i is the mass of droplets in the i-th area sampling area; manual mode: the display processing module will calculate according to the sampling area and the number of area sampling areas i selected by the operator, and then follow the subsequent calculation method of the automatic mode.

[0017] In the above solution, the shadow generating device includes imaging paper and a light source.

[0018] In the above solution, the support frame is a triangular support frame.

[0019] In the above scheme, a supporting device is provided on the upper side of the supporting frame, and the supporting device is used to support the droplet collecting plate, the imaging paper and the image acquisition device, wherein the droplet collecting plate is arranged above the imaging paper, and the image acquisition device is arranged below the imaging paper; the droplet collecting plate protrudes from the supporting device when collecting droplets; after collecting the droplets, the droplet collecting plate is pushed into the supporting device; at this time, the droplet collecting plate is placed directly above the forming paper.

[0020] In the above solution, a light source is provided above the droplet collecting plate.

[0021] The present invention has the following beneficial effects compared to the prior art:

[0022] 1. Based on the principle of light propagation, the present invention combines wireless networks with image processing to achieve real-time field measurement of spray deposition parameters. This method provides a new breakthrough for online field measurement of spray deposition parameters and offers solutions to the problems encountered in traditional image-based measurement of droplet deposition parameters. Furthermore, through continuous improvement of droplet deposition detection methods, it can promote improvements and innovations in plant protection machinery.

[0023] 2. The present invention provides a detection system for measuring spray deposition parameters, which can achieve rapid detection and evaluation of spray deposition parameters without relying on the color of the liquid medicine.

[0024] 3. The present invention can reduce the workload of traditional measurement of spray deposition parameters and avoid the disadvantage of liquid color in traditional image method for measuring spray deposition parameters, providing a solution for rapid detection of spray deposition parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an overall framework diagram of an online detection system for spray deposition parameters based on the light propagation principle of the present invention;

[0026] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of the support frame, droplet collection plate and forming paper involved.

[0027] The figures are marked as follows: 1-droplet collection plate; 2-image acquisition device; 3-shadow generation device; 4-wireless gateway module; 5-display processing module; 6-wireless networking module; 7-support frame; 8-image data transmission device; 9-power module, 10-imaging paper, 11-light source. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0029] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] Combined with attachment Figure 1Figure 2 shows the overall framework of an online detection system for spray deposition parameters based on the principle of light propagation. This system, based on the shadow principle, combines wireless networks with image processing technology to achieve online detection and evaluation of spray deposition parameters. The system includes a droplet collection plate 1, an image acquisition device 2, a shadow generation device 3, a wireless gateway module 4, a display processing module 5, a wireless networking module 6, a support frame 7, an image data transmission device 8, and a power supply module 9. The shadow generation device 3 includes imaging paper 10 and a light source 11.

[0031] The droplet collection plate 1, shadow generation device 3, image acquisition device 2, wireless networking module 6, and support frame 7 constitute the droplet deposition parameter measurement unit. The droplet collection plate 1 is used to collect droplet deposits after the spray operation and automatically send them to the shadow generation device. The shadow generation device 3 generates droplet shadows on the collection plate based on the principle of rectilinear propagation of light. The image acquisition device 2 is used to acquire shadow images. The wireless networking module 6 is used to establish a wireless network and wirelessly communicate. The tripod is used for point measurement of the droplet deposition parameter measurement unit. The image data transmission device 8, wireless networking module 6, and wireless gateway module 4 constitute the network data acquisition unit. The image data transmission device 8 transmits shadow images. The wireless networking module 6 establishes data links between multiple network data acquisition units. The wireless gateway module 4 wirelessly communicates data from the data acquisition local area network with the display processing module.

[0032] The working process of an online detection system for spray deposition parameters based on the principle of light propagation is as follows: when performing field spraying operations, first arrange the sampling points in the field, turn on the power before starting the operation, and after the spraying operation is completed, use the display processing module 5 to send a "start" command, and forward the command to the data acquisition local area network through the wireless gateway module 4. After each wireless networking module 6 receives the "start" command, it automatically controls the retraction of the droplet collection plate 1, generates corresponding droplet shadows through the shadow generation device 3, and collects droplet shadows through the image acquisition device 2. Multiple collections are performed here to facilitate subsequent data processing. The image data is uploaded to the display processing module 5 through the wireless gateway module 4 through the image data transmission device 8. After receiving the data, the display processing module 5 sends a "stop" command to the data acquisition local area network according to the above process, and the collection is completed. The collected data is processed and saved using the display processing module 5. There are different processing modes for data processing sampling area selection: automatic and manual modes. In the automatic mode, after setting the parameters, the sampling area is automatically selected according to the collected and transmitted image data. The number of area sampling areas i and the area sampling threshold are set. ,S is the area of ​​the acquisition board, target locking value t iis the target locking value of the i-th area sampling area, and the display processing module will select the area sampling area based on the Δt approaching principle. ti is the droplet coverage area in the i-th area sampling area. Spray deposition density N i is the number of droplets in the i-th sampling area, and the coverage rate per unit area of ​​spray deposition Mass per unit area of ​​spray deposition m i is the mass of droplets in the i-th area sampling area. In the manual mode, the display processing module will calculate according to the sampling area selected by the operator and the number of area sampling areas i, and then follow the calculation method of the automatic mode.

[0033] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0034] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. An online detection system for spray deposition parameters based on the principle of light propagation, characterized in that: It includes a droplet collection plate, a shadow generating device, an image acquisition device, an image data transmission device, a wireless networking module, a wireless gateway module, a power supply module, a display processing module and a support frame; during the spraying operation, the droplet collection plate is used to collect the droplets to be detected; the shadow generating device is used to make the droplets on the droplet collection plate produce corresponding shadows; the image acquisition device is used to collect the generated droplet shadow images; the image data transmission device is used to establish a wireless local area network for collection and realize the transmission of image data; the wireless gateway module is used to upload the collected image data to the display processing module; The power supply module is connected to the droplet collection plate, the shadow generation device, the image acquisition device, the image data transmission device and the wireless gateway module; the display processing module is used to set the image processing parameters, store and process the data, and send instructions to the wireless gateway module; the support frame is used to arrange the collection points of the data collection local area network to realize the measurement of spray deposition parameters; The shadow generating device generates corresponding shadows on the droplets on the droplet collecting plate based on the propagation principle of light. By processing the droplet shadow image, the droplet deposition parameter information of the droplet collecting plate can be obtained. The droplet deposition parameters on the droplet collecting plate, including the number of droplets and the droplet coverage area, are obtained by the following formula: N Z1 =N Z2 k=f(h) S 1i =k×S 2i Among them, N Z1 is the number of droplets on the droplet collection plate, N Z2 is the number of fog droplets on the fog droplet shadow image, S 1i is the droplet coverage area on the droplet collection plate, S 2i is the coverage area of ​​the droplet on the droplet shadow image, h is the vertical distance from the droplet collection plate to the imaging paper, and k is a function of h; Based on the obtained droplet coverage area on the droplet collection plate and the spherical cap and volume formula, the droplet deposition amount (m) on the droplet collection plate can be calculated by the following formula: m=ρ×V z1 Where ρ is the liquid density, V Z1 Droplet deposition volume, k2 = f(θ), θ is the contact angle between the droplet and the droplet collection plate surface, k2 is a function of θ, S 11 , S 12 ,...,S 1i , S 1n It is the spreading area of ​​the droplets on the droplet collection plate.

2. The spray deposition parameter online detection system based on the light propagation principle according to claim 1 is characterized in that: The display processing module realizes the processing and storage of the collected data; in the processing of the collected data, there are automatic mode and manual mode for the sampling area selection; automatic mode: after setting the parameters, the sampling area is automatically selected according to the collected and transmitted image data; the number of area sampling areas i and the area sampling threshold are set S is the area of ​​the droplet collection plate, the target locking value t i is the target locking value of the i-th area sampling area. The display processing module will select the area sampling area according to the Δt approach principle. S ti is the droplet coverage area in the i-th area sampling area; spray deposition density N i is the number of droplets in the i-th sampling area, and the coverage rate per unit area of ​​spray deposition Mass per unit area of ​​spray deposition m i is the mass of droplets in the i-th area sampling area; manual mode: the display processing module will calculate according to the sampling area and the number of area sampling areas i selected by the operator, and then follow the subsequent calculation method of the automatic mode.

3. The spray deposition parameter online detection system based on the light propagation principle according to claim 1 is characterized in that: The shadow generating device includes imaging paper and a light source.

4. The spray deposition parameter online detection system based on the light propagation principle according to claim 1 is characterized in that: The support frame is a triangular support frame.

5. The spray deposition parameter online detection system based on the light propagation principle according to claim 1 is characterized in that: A supporting device is provided on the top of the support frame, which is used to support the droplet collecting plate, imaging paper and image acquisition device, wherein the droplet collecting plate is arranged above the imaging paper, and the image acquisition device is arranged below the imaging paper; the droplet collecting plate protrudes from the supporting device when collecting droplets; after collecting droplets, the droplet collecting plate is pushed into the supporting device; at this time, the droplet collecting plate is placed directly above the forming paper.

6. The on-line detection system for spray deposition parameters based on the light propagation principle according to claim 5 is characterized in that: A light source is arranged above the mist droplet collecting plate.

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