A real-time on-site droplet collection device and method

Abstract

The present invention discloses a real-time field droplet collection device and method, the droplet collection device comprises a collection terminal and a droplet analysis terminal, the collection terminal comprises a droplet collection module and an image collection module, the droplet collection module comprises a collection box, the outside of the collection box is provided with a collection receiving part for receiving a test paper, the receiving area on the collection receiving part is communicated with the inner cavity of the collection box, the inner cavity bottom surface of the collection box is a downwardly inclined image collection placement surface; the image collection module comprises a visual sensor, the visual sensor is arranged on the collection box, the visual acquisition end of the visual sensor extends into the inner cavity of the collection box and faces the image acquisition placement surface; the visual sensor is connected to the droplet analysis terminal. After collecting droplet samples, the present invention can obtain and analyze images of droplet samples in real time and field, understand the field distribution of pesticides in real time, and has the advantages of simple operation and less time consumption.

Description

Technical Field

[0001] The invention relates to a fog droplet collection device and method, and in particular to a real-time on-site fog droplet collection device and method. Background Art

[0002] With the rapid development and application of agricultural aerospace technology and electronic information technology, drones, as a highly automated and intelligent equipment, are widely used in agricultural and forestry plant protection, aerial photography, placement, electricity, logistics and other fields due to their unique advantages such as small size, light weight, easy to carry, wide range of uses and low cost.

[0003] Among them, plant protection spraying is one of the main application areas of drones. Drones act as a means of transportation, carrying pesticides to spray plants in the air. Compared with traditional manual spraying, drone spraying has greatly improved the efficiency of spraying and reduced the labor intensity of manual labor.

[0004] Furthermore, in order to obtain the effect of drone spraying, it is necessary to collect the droplets and then analyze the distribution of the droplets to judge the spraying effect. Among them, the prior art has proposed some droplet collection devices, which mainly use oil pans, magnesium oxide sampling plates, water-sensitive test papers, etc. to collect droplet samples, and then analyze and count the collected samples through manual analysis or image processing methods.

[0005] Although the above droplet collection method can collect and analyze droplets, it still has the following shortcomings:

[0006] 1. After sampling, the samples need to be transferred to the laboratory and analyzed using a spectrometer or computer image processing software. The analysis results cannot be obtained in real time.

[0007] 2. After obtaining the droplet samples, a large number of test papers need to be manually scanned before analysis, which is a huge workload and very time-consuming. Summary of the invention

[0008] The purpose of the present invention is to overcome the above-mentioned problems and provide a real-time on-site droplet collection device. After collecting the droplet samples, the droplet collection device can acquire and analyze the images of the droplet samples in real time and understand the field distribution of pesticides in real time. It also has the advantages of simple operation and less time consumption.

[0009] Another object of the present invention is to provide a real-time on-site droplet collection method.

[0010] The purpose of the present invention is achieved through the following technical solutions:

[0011] A real-time on-site droplet collection device, comprising a collection terminal and a droplet analysis terminal, wherein the collection terminal comprises a droplet collection module and an image collection module, wherein the droplet collection module comprises a collection box, wherein the outside of the collection box is provided with a collection receiving portion for receiving a test paper, wherein the collection receiving portion is provided with a receiving area, wherein the receiving area is communicated with an inner cavity of the collection box, and wherein the inner cavity bottom surface of the collection box is a downwardly inclined image collection placement surface;

[0012] The image acquisition module includes a visual sensor for acquiring an image of the test paper, the visual sensor is arranged on the acquisition box, and a visual acquisition end of the visual sensor extends into the inner cavity of the acquisition box and faces the image acquisition placement surface;

[0013] The visual sensor is connected to the droplet analysis terminal via a signal connection.

[0014] The working principle of the above-mentioned real-time field droplet collection device is:

[0015] During operation, the collection box is placed in the collection site, and a blank test paper is placed on the collection receiving part of the collection box, and then the droplet collection work is started. After the current collection task is completed, the test paper with droplets is pushed into the collection box. When the test paper enters the inner cavity of the collection box, it slides downward along the downward inclined image collection placement surface under the action of its own gravity until it stops in the image collection area of ​​the visual sensor. Then the visual sensor is started to obtain the image of the test paper in the image collection area, and the obtained image is transmitted to the droplet analysis terminal, which analyzes the image to obtain the current drone spraying effect, understand the field distribution of pesticides in real time, and then adjust the application according to the specific situation.

[0016] In a preferred embodiment of the present invention, the inner cavity of the acquisition box includes an image acquisition cavity for the visual sensor to acquire images and a storage cavity for storing test papers that have completed image acquisition, and the image acquisition placement surface is arranged in the image acquisition cavity;

[0017] The image acquisition chamber is provided with a barrier device for blocking the test paper in the image acquisition area at one end close to the storage chamber, and the bottom surface of the storage chamber is lower than the image acquisition placement surface. Through the above structure, after the droplets are collected, the test paper with the droplets enters the image acquisition chamber of the acquisition box and slides downward, and the barrier device blocks the test paper so that the test paper is located in the image acquisition area, thereby ensuring that the visual sensor can successfully acquire the original image of the test paper. After the image is acquired, the barrier device cancels the blockage of the test paper, and under the action of gravity, the test paper slides into the storage chamber, and the storage chamber uniformly collects the test papers that have completed the acquisition task for subsequent sorting and summarization.

[0018] Preferably, the barrier device comprises a metal barrier plate and an electromagnetic drive mechanism, the metal barrier plate is hinged on the image acquisition placement surface, a torsion spring is provided between the metal barrier plate and the acquisition box, the torsion spring is sleeved on the hinge center of the metal barrier plate, and the two ends are respectively fixed on the metal barrier plate and the acquisition box; in a natural state, the metal barrier plate stands on the image acquisition placement surface; when the electromagnetic drive mechanism is energized, the electromagnetic drive mechanism drives the metal barrier plate to rotate downward around the hinge center, and turns to below the image acquisition placement surface or to be flush with the image acquisition placement surface.

[0019] Furthermore, the electromagnetic drive mechanism is arranged below the image acquisition placement surface, and includes an electromagnetic coil and an iron core. The electromagnetic coil is wrapped around the outside of the iron core, and the electromagnetic coil is connected to a power source. When the electromagnetic coil is energized, a downward magnetic attraction force is generated, driving the metal baffle plate to rotate downward around the hinge center, releasing the obstruction to the test paper, so that the test paper can automatically slide into the storage cavity. In the above process, the torsion spring is squeezed and deformed, generating elastic potential energy. When the electromagnetic coil is powered off, the potential energy is released, driving the metal baffle plate to rotate upward and stand on the image acquisition placement surface, thereby forming a state of blocking the test paper.

[0020] Preferably, a storage door is provided at one end of the storage chamber away from the image acquisition chamber. After the acquisition task of the current stage is completed, the storage door of the storage chamber is opened to take out all the test papers of the original droplet test and then organize and summarize them.

[0021] In a preferred embodiment of the present invention, the collecting and placing portion is provided with two placement grooves arranged opposite to each other, and the placing area is formed between the two placement grooves.

[0022] In a preferred embodiment of the present invention, a blocking portion with an arc protrusion is provided between the image acquisition placement surface and the acquisition receiving portion. The test paper is placed on the acquisition receiving portion and pushed in along the track. When slight resistance is encountered, it indicates that the preset position formed by the semi-cylindrical protrusion has been reached, and the pushing is stopped immediately. After the droplets fall on the test paper, the test paper is pushed in with a light force to pass over the blocking portion with the arc protrusion. Under the action of gravity, the test paper slides down along the image acquisition placement surface into the image acquisition area.

[0023] In a preferred embodiment of the present invention, the visual sensor is connected to the droplet analysis terminal via a wireless signal.

[0024] In a preferred embodiment of the present invention, the droplet analysis terminal is a computer loaded with droplet analysis software.

[0025] Preferably, the computer is provided with a control program for controlling the visual sensor and the electromagnetic drive mechanism to work, and the control program is integrated into the droplet analysis software;

[0026] The acquisition box is provided with a terminal control module, which includes a terminal processor, a terminal memory and a terminal signal transmission module; the terminal processor acquires the signal of the visual sensor and converts it into an image and stores it in the terminal memory, or sends it out through the terminal signal transmission module. Through the above structure, the visual sensor and the electromagnetic drive mechanism can be controlled by a computer to work, which greatly facilitates the acquisition operation.

[0027] A real-time on-site droplet collection method comprises the following steps:

[0028] (1) Place the collection box in the collection site and place a blank test paper on the collection receiving portion of the collection box;

[0029] (2) After the current collection task is completed, the test paper containing the droplets is pushed into the collection box;

[0030] (3) After the test paper enters the inner cavity of the collection box, it slides down along the inclined image collection placement surface under the action of its own gravity until it stops in the image collection area of ​​the visual sensor;

[0031] (4) starting the visual sensor to acquire an image of the test paper located in the image acquisition area, and transmitting the acquired image to the droplet analysis terminal;

[0032] (5) The droplet analysis terminal analyzes the acquired image and publishes the analysis results.

[0033] In a preferred embodiment of the present invention, in step (4), the test paper droplet analysis software is opened by a computer, and the visual sensor (camera) is opened by clicking on the operation interface to obtain an image of the test paper located in the image acquisition area.

[0034] In a preferred embodiment of the present invention, in step (3), after the droplets are collected, the test paper with the droplets collected enters the image acquisition cavity of the collection box and slides downward, and the test paper is blocked by the barrier device so that the test paper is located in the image acquisition area;

[0035] After the image is acquired, the barrier device removes the barrier to the test paper, and the test paper slides down into the storage chamber under the action of gravity, and the storage chamber uniformly collects the test paper that has completed the acquisition task.

[0036] Preferably, the barrier device cancels the obstruction of the test paper by controlling the electromagnetic drive mechanism to be energized on a computer. When the electromagnetic coil is energized, a downward magnetic attraction force is generated to drive the metal barrier plate to rotate downward around the hinge center and rotate to below the image acquisition placement surface or to be flush with the image acquisition placement surface.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The present invention integrates a droplet collection module and an image collection module to construct a collection terminal. After the droplet samples are collected, there is no need to transfer the samples. The images of the droplet samples can be acquired and analyzed in real time on the spot, and the field distribution of pesticides can be understood in real time.

[0039] 2. After obtaining the droplet sample, there is no need to transfer the sample to another site. The image of the droplet sample can be immediately obtained through the visual sensor set on the collection box, and the obtained image can be transmitted to the droplet analysis terminal for analysis. The operation is very simple and time-saving.

[0040] 3. The droplet collection device of the present invention can collect droplets outdoors anytime and anywhere, and has good flexibility and portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a side view of the real-time on-site droplet collection device in the present invention.

[0042] Figure 2 It is a schematic diagram of the three-dimensional structure of the real-time on-site droplet collection device in the present invention, wherein a in the figure represents a test paper.

[0043] Figure 3 It is a schematic diagram of the local structure of the collection and placement part in the present invention.

[0044] Figure 4-6 is a cross-sectional view of the real-time field droplet collection device of the present invention, in which a represents a test paper; wherein, Figure 4 This is a cross-sectional view during the acquisition process. Figure 5 To obtain the cross-sectional view during the image acquisition process, Figure 6 This is a cross-sectional view of the test strip storage process. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0046] See also Figure 1-6 The real-time on-site droplet collection device in this embodiment includes a collection terminal and a droplet analysis terminal. The collection terminal includes a droplet collection module and an image collection module. The droplet collection module includes a collection box 1. The outside of the collection box 1 is provided with a collection receiving portion 1-1 for receiving a test paper. The collection receiving portion 1-1 is connected to the inner cavity of the collection box 1. The bottom surface of the inner cavity of the collection box 1 is a downwardly inclined image collection placement surface 1-2.

[0047] The image acquisition module includes a visual sensor 2 for acquiring the image of the test paper. The visual sensor 2 is arranged on the acquisition box 1. The visual acquisition end of the visual sensor 2 extends into the inner cavity of the acquisition box 1 and faces the image acquisition placement surface 1-2. Specifically, the visual sensor 2 is a Weixin Vision AF500W1 camera, which adopts an autofocus form and has a maximum resolution of 2592*1944. Furthermore, the outer ring of the camera is provided with an LED fill light 3, which is turned on during image acquisition to ensure that there is sufficient light source for the acquired image. The LED fill light 3 is a circular light ring with an outer diameter of 35mm and 24 patch lights connected in series, weighing 2g.

[0048] The droplet analysis terminal is connected to the visual sensor 2 via a wireless signal, and the wireless signal may be a wireless network signal or a Bluetooth transmission signal, etc. Further, the droplet analysis terminal is a computer loaded with droplet analysis software, and may be a laptop computer; a control program for controlling the visual sensor 2 and the electromagnetic drive mechanism to work is provided on the computer, and the control program is integrated in the droplet analysis software.

[0049] The acquisition box 1 is provided with a terminal control module and a power management module, and the terminal control module includes a terminal processor, a terminal memory and a terminal signal transmission module; the terminal processor acquires the signal of the visual sensor 2 and converts it into an image and stores it in the terminal memory, or sends it out through the terminal signal transmission module. Specifically, the terminal memory can temporarily store data when there is a failure such as failure in wireless data transmission and reception, so as to facilitate the subsequent reading of data by wireless or wired means. The terminal signal transmission module has a carrier frequency of 490MHz, a serial port rate of 9600b / s, and a power of 100mW. The power management module is a rechargeable lithium-ion battery pack with a capacity of 5000mAh, an output voltage of 12V, and a maximum discharge current of 3A.

[0050] See also Figure 4-6The inner cavity of the acquisition box 1 includes an image acquisition cavity 1-3 for the visual sensor 2 to acquire images and a storage cavity 1-4 for storing the test paper that has completed image acquisition. The image acquisition placement surface 1-2 is arranged in the image acquisition cavity 1-3; the end of the image acquisition cavity 1-3 close to the storage cavity 1-4 is provided with a barrier device for blocking the test paper in the image acquisition area, and the bottom surface of the storage cavity 1-4 is lower than the image acquisition placement surface 1-2; the end of the storage cavity 1-4 away from the image acquisition cavity 1-3 is provided with a storage door 4. After the acquisition task of the current stage is completed, the storage door 4 of the storage cavity 1-4 is opened, and all the test papers of the original droplet test are taken out, and then sorted and summarized. Through the above structure, after the droplets are collected, the test paper with the droplets enters the image acquisition cavity 1-3 of the acquisition box 1, and slides downward, and the test paper is blocked by the barrier device, so that the test paper is located in the image acquisition area, thereby ensuring that the visual sensor 2 can successfully acquire the original image of the test paper. After the image is acquired, the barrier device removes the barrier to the test paper, and under the action of gravity, the test paper slides into the storage chamber 1-4, and the storage chamber 1-4 uniformly collects the test paper that has completed the acquisition task for subsequent sorting and summarization. Of course, the storage chamber 1-4 can also be composed of the inner cavity of a storage box arranged in parallel with the acquisition box 1.

[0051] Furthermore, the barrier device includes a metal barrier plate 5 and an electromagnetic drive mechanism, wherein the metal barrier plate 5 is hinged on the image acquisition placement surface 1-2, and a torsion spring (not shown in the figure) is provided between the metal barrier plate 5 and the acquisition box 1, and the torsion spring is sleeved on the hinge center of the metal barrier plate 5, and the two ends are respectively fixed on the metal barrier plate 5 and the acquisition box 1; in a natural state, the metal barrier plate 5 stands on the image acquisition placement surface 1-2; when the electromagnetic drive mechanism is powered on, the electromagnetic drive mechanism drives the metal barrier plate 5 to rotate downward around the hinge center, and rotate to below the image acquisition placement surface 1-2 or to be flush with the image acquisition placement surface 1-2. Specifically, the electromagnetic drive mechanism is electrically connected to the terminal control module, so that it can work under the control of a computer.

[0052] See also Figure 1-6 The electromagnetic drive mechanism is arranged below the image acquisition placement surface 1-2, and includes an electromagnetic coil 6 and an iron core. The electromagnetic coil 6 is wrapped around the outside of the iron core, and the electromagnetic coil 6 is connected to a power source. When the electromagnetic coil 6 is energized, a downward magnetic attraction force is generated, driving the metal baffle plate 5 to rotate downward around the hinge center, removing the obstruction to the test paper, so that the test paper can automatically slide into the storage cavity 1-4. In the above process, the torsion spring is squeezed and deformed, generating elastic potential energy. When the electromagnetic coil 6 is powered off, the potential energy is released, driving the metal baffle plate 5 to rotate upward and stand on the image acquisition placement surface 1-2, thereby forming a state of blocking the test paper.

[0053] See also Figure 3The collection and placement part 1-1 is provided with two placement grooves 1-1-1 arranged opposite to each other, and a placement area for placing the test paper is formed between the two placement grooves 1-1-1.

[0054] See also Figure 4-6 A circular arc-shaped raised blocking portion 1-5 is provided between the image acquisition placement surface 1-2 and the acquisition placement portion 1-1. The test paper is placed on the acquisition placement portion 1-1 and pushed in along the track. If slight resistance is encountered, it indicates that the preset position formed by the semi-cylindrical protrusion has been reached, and the pushing is stopped immediately. After the droplets fall on the test paper, the test paper is pushed in with light force to pass over the circular arc-shaped raised blocking portion 1-5. Under the action of gravity, the test paper slides down along the image acquisition placement surface 1-2 into the image acquisition area.

[0055] See also Figure 1-6 The collection box 1 in this embodiment is supported on a triangular bracket 7, which has a foldable structure and can be easily stored; the specific extension is fixed by a firm lock, which has good stability and can be responsible for stabilizing the collection box 1 and related components of the collection box 1.

[0056] See also Figure 1-6 The real-time field droplet collection method in this embodiment includes the following steps:

[0057] (1) Start the power management module switch, connect the power, and set the self-starting collection device to the initial state. Place the collection box 1 in the collection site, and place a blank test paper on the collection receiving part 1-1 of the collection box 1.

[0058] (2) After the set collection time has passed, the test paper containing the mist droplets is pushed into the collection box 1.

[0059] (3) After the test paper enters the inner cavity of the acquisition box 1, it slides downward along the downwardly inclined image acquisition placement surface 1-2 under the action of its own gravity, and is blocked by the barrier device and stays in the image acquisition area of ​​the visual sensor 2.

[0060] (4) Open the test paper droplet analysis software through the computer, click to open the visual sensor 2 (camera) in the operation interface, obtain the image of the test paper located in the image acquisition area, and transmit the acquired image to the droplet analysis terminal. Further, after the image is acquired, the barrier device cancels the blocking of the test paper, and the test paper slides into the storage chamber 1-4 under the action of gravity, and the storage chamber 1-4 uniformly collects the test paper that has completed the collection task.

[0061] (5) The droplet analysis terminal analyzes the acquired image and publishes the analysis results.

[0062] Furthermore, the barrier device in this embodiment cancels the obstruction of the test paper in the following manner: the electromagnetic drive mechanism is controlled to be energized on a computer, and when the electromagnetic coil 6 is energized, a downward magnetic attraction force is generated to drive the metal barrier plate 5 to rotate downward around the hinge center to below the image acquisition placement surface 1-2 or to be flush with the image acquisition placement surface 1-2.

[0063] See also Figure 1-6 The working principle of the above-mentioned real-time field droplet collection device is:

[0064] During operation, the collection box 1 is placed in the collection site, and a blank test paper is placed on the collection receiving portion 1-1 of the collection box 1, and then the droplet collection work is started. Figure 4 After the set collection time, the test paper with the droplets is pushed into the collection box 1. After the test paper enters the inner cavity of the collection box 1, it slides down along the downwardly inclined image collection placement surface 1-2 under the action of its own gravity until it stops in the image collection area of ​​the visual sensor 2. Figure 5 Then, the visual sensor 2 is started to obtain the image of the test paper in the image acquisition area, and the obtained image is transmitted to the droplet analysis terminal, which analyzes the image to obtain the current effect of the drone spraying, understand the field distribution of pesticides in real time, and then adjust the pesticide application according to the specific situation.

[0065] Further, after the image is acquired, the barrier device removes the obstruction to the test paper, and under the action of gravity, the test paper slides into the storage chamber 1-4, and the storage chamber 1-4 uniformly collects the test paper that has completed the acquisition task, such as Figure 6 , so as to facilitate subsequent sorting and summarization.

[0066] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A real-time on-site droplet collection device, characterized in that: It includes a collection terminal and a droplet analysis terminal, the collection terminal includes a droplet collection module and an image collection module, the droplet collection module includes a collection box, the outside of the collection box is provided with a collection receiving part for receiving the test paper, the collection receiving part is provided with a receiving area, the receiving area is communicated with the inner cavity of the collection box, and the inner cavity bottom surface of the collection box is a downwardly inclined image collection placement surface; The image acquisition module includes a visual sensor for acquiring an image of the test paper, the visual sensor is arranged on the acquisition box, and the visual acquisition end of the visual sensor extends into the inner cavity of the acquisition box and faces the image acquisition placement surface; the visual sensor is connected to the droplet analysis terminal through a signal connection method; The inner cavity of the acquisition box includes an image acquisition cavity for the visual sensor to acquire images and a storage cavity for storing test papers that have completed image acquisition, and the image acquisition placement surface is arranged in the image acquisition cavity; a barrier device for blocking the test paper in the image acquisition area is arranged at one end of the image acquisition cavity close to the storage cavity, and the bottom surface of the storage cavity is lower than the image acquisition placement surface; a storage door is arranged at one end of the storage cavity away from the image acquisition cavity; The baffle device comprises a metal baffle plate and an electromagnetic drive mechanism, wherein the metal baffle plate is hinged on the image acquisition placement surface, a torsion spring is arranged between the metal baffle plate and the acquisition box, the torsion spring is sleeved on the hinge center of the metal baffle plate, and the two ends are respectively fixed on the metal baffle plate and the acquisition box; in a natural state, the metal baffle plate stands on the image acquisition placement surface; when the electromagnetic drive mechanism is powered on, the electromagnetic drive mechanism drives the metal baffle plate to rotate downward around the hinge center, and rotate to below the image acquisition placement surface or to be flush with the image acquisition placement surface; The electromagnetic drive mechanism is arranged below the image acquisition placement surface, and comprises an electromagnetic coil and an iron core, wherein the electromagnetic coil surrounds the outside of the iron core, and the electromagnetic coil is connected to a power source; The acquisition and placement part is provided with two placement grooves arranged opposite to each other, and the placement area is formed between the two placement grooves; a blocking part with an arc protrusion is provided between the image acquisition placement surface and the acquisition and placement part.

2. The real-time on-site droplet collection device according to claim 1, characterized in that: The visual sensor is connected to the droplet analysis terminal via a wireless signal; the droplet analysis terminal is a computer loaded with droplet analysis software; The computer is provided with a control program for controlling the visual sensor and the electromagnetic drive mechanism to work, and the control program is integrated into the droplet analysis software; The acquisition box is provided with a terminal control module, which includes a terminal processor, a terminal memory and a terminal signal transmission module; the terminal processor acquires the signal of the visual sensor and converts it into an image and stores it in the terminal memory, or sends it out through the terminal signal transmission module.

3. A real-time on-site droplet collection method applied to the real-time on-site droplet collection device according to claim 2, characterized in that: The following steps are involved: (1) Place the collection box in the collection area and place a blank test paper on the collection receiving part of the collection box; (2) After the current collection task is completed, the test paper containing the droplets is pushed into the collection box; (3) After the test paper enters the inner cavity of the collection box, it slides down along the inclined image collection placement surface under the action of its own gravity until it stops in the image collection area of ​​the visual sensor; (4) starting the visual sensor, acquiring an image of the test paper in the image acquisition area, and transmitting the acquired image to the droplet analysis terminal; (5) The droplet analysis terminal analyzes the acquired images and publishes the analysis results.

4. The real-time on-site droplet collection method according to claim 3, characterized in that: In step (4), the test paper droplet analysis software is opened through a computer, and the visual sensor is opened by clicking on the operation interface to obtain an image of the test paper located in the image acquisition area.

5. The real-time on-site droplet collection method according to claim 3, characterized in that: In step (3), after the droplets are collected, the test paper with the droplets collected enters the image acquisition cavity of the collection box and slides downward, and the test paper is blocked by the barrier device so that the test paper is located in the image acquisition area; After the image is acquired, the barrier device removes the barrier to the test paper, and the test paper slides down into the storage chamber under the action of gravity, and the storage chamber uniformly collects the test paper that has completed the acquisition task.

6. The real-time on-site droplet collection method according to claim 5, characterized in that: The blocking device removes the blocking of the test paper by controlling the electromagnetic drive mechanism to be energized on a computer. When the electromagnetic coil is energized, a downward magnetic attraction force is generated to drive the metal blocking plate to rotate downward around the hinge center and rotate to below the image acquisition placement surface or to be flush with the image acquisition placement surface.

Images