CN117243095A - Irrigation system suitable for unmanned agricultural machinery operation - Google Patents

Abstract

The invention discloses an irrigation system suitable for unmanned agricultural machinery operations. It is applied in the technical field of unmanned agricultural machinery irrigation systems and includes an unmanned agricultural vehicle and an irrigation pipeline system. It is characterized in that: the irrigation pipeline system is provided on an unmanned agricultural machinery. Inside the agricultural locomotive, the irrigation pipeline system includes a fertilizer tank, water tank one and water tank two. The fertilizer tank is arranged on the head of the unmanned agricultural locomotive. The water tank one and two are arranged on the head of the unmanned agricultural locomotive. At the rear; a fertilizer pipe 1 is connected between the fertilizer tank and a water tank 1, a liquid pump 2 is connected to the fertilizer pipe 1, a fertilizer pipe 2 is connected between the fertilizer tank and the water tank 2, and a fertilizer pipe 2 is connected to the fertilizer pipe 2 A liquid pump three is connected. One side of the water tank one is connected to a water outlet pipe. One side of the water tank two is connected to a water outlet pipe two. The connection between the water outlet pipe one and the water outlet pipe two is connected by a tee. Liquid pipe, the invention improves the utilization rate of unmanned agricultural machinery and improves agricultural irrigation efficiency.

Description

An irrigation system suitable for unmanned agricultural machinery operations

Technical field

The invention is applied in the technical field of unmanned agricultural machinery irrigation systems, and is called an irrigation system suitable for unmanned agricultural machinery operations.

Background technique

The application of unmanned agricultural machinery, on the one hand, improves the efficiency of agricultural production and ensures the security of our country's food supply. On the other hand, the large-scale application of unmanned agricultural machinery also liberates people from heavy agricultural production and greatly improves people's life.

Intelligent unmanned agricultural machinery needs to complete more than one agricultural operation, such as but not limited to spraying chemicals, fertilizing, and sowing. In the existing working mode of smart agricultural machinery, if you want to simply spray ground water for irrigation, you cannot apply fertilizer. If you want to implement fertilization, you cannot implement spray irrigation. A variety of different types of unmanned agricultural machinery equipment are required to be used together. This operation greatly reduces the cost. It reduces the utilization rate of unmanned agricultural machinery and reduces agricultural irrigation efficiency.

Therefore, it is necessary to provide an irrigation system suitable for unmanned agricultural machinery operations, which can realize the functions of both irrigation and fertilization by unmanned agricultural machinery, improve the utilization rate of unmanned agricultural machinery and improve agricultural irrigation efficiency.

Contents of the invention

The purpose of the present invention is to provide an irrigation system suitable for unmanned agricultural machinery operations to solve the problems raised in the above background technology.

In order to solve the above technical problems, the present invention provides the following technical solution: an irrigation system suitable for unmanned agricultural machinery operations, including an unmanned agricultural vehicle and an irrigation pipeline system, characterized in that: the irrigation pipeline system is provided on the unmanned agricultural machinery Inside the vehicle, the irrigation pipeline system includes a fertilizer tank, a water tank 1 and a water tank 2. The fertilizer tank is located at the head of the unmanned agricultural vehicle, and the water tank 1 and water tank 2 are located at the rear of the unmanned agricultural vehicle. ;

There is a fertilizer pipe one connected between the fertilizer tank and the water tank one, a liquid pump two connected to the fertilizer pipe one, a fertilizer pipe two connected between the fertilizer tank and the water tank two, and a fertilizer pipe two connected to the fertilizer pipe two. Liquid pump three, one side of the water tank one is connected to a water outlet pipe one, one side of the water tank two is connected to a water outlet pipe two, the connection between the water outlet pipe one and the water outlet pipe two is connected to a liquid outlet pipe through a tee , the liquid outlet pipe is connected to a liquid pump one, the water outlet pipe one is connected to an electronically controlled valve one, and the water outlet pipe two is connected to an electronically controlled valve two.

In one embodiment, the other side of the water tank one is connected to a water inlet pipe one, the water inlet pipe one is connected to an electronically controlled valve three, the other side of the water tank two is connected to a water inlet pipe two, and the water inlet pipe one is connected to an electronically controlled valve three. The water pipe two is connected to an electronically controlled valve four, the water inlet pipe one and the water inlet pipe two are connected to a central pipe through a tee, and the central pipe is connected to a liquid pump four.

In one embodiment, the first water tank and the second water tank are connected by a pipeline, and a bidirectional suction pump and a flow control valve are connected to the pipeline between the first water tank and the second water tank.

In one embodiment, a concentration detector and a liquid level sensor are provided in both water tank one and water tank two.

In one embodiment, the bottom of the unmanned agricultural vehicle is provided with a water suction pipe, the head of the unmanned agricultural vehicle is provided with a feed pipe, and the central tube is connected to the water suction pipe.

In one embodiment, step one: before using the unmanned agricultural machine, pour the fertilizing liquid into the fertilizer tank through the feeding pipe;

Step 2: Control the unmanned agricultural locomotive to walk among agricultural crops, place the water suction pipe in the ditch between the crops, start the liquid pump four to suck the water in the ditch into water tanks one and two, and store the water;

Step 3: Start the liquid pump to pump the stored water into the irrigation spray device, and then spray it into the crops through the irrigation spray device to achieve irrigation water;

Step 4: When it is necessary to fertilize, open liquid pump three and liquid pump two successively, pump the fertilizing liquid in the fertilizer tank through fertilizer pipe two and fertilizer pipe one into water tank two and water tank one, mix with water to form a mixed liquid, and then pass through Irrigation spraying devices spray into crops to achieve irrigation and fertilization;

Step 5: When fertilization is not needed, turn off liquid pump three and liquid pump two, stop the fertilizer liquid from entering water tanks one and two, and repeat steps two and three to irrigate crops.

Compared with the existing technology, the beneficial effects achieved by the present invention are: by providing an irrigation pipeline system, the present invention realizes switching between irrigation and fertilization, ensures the utilization rate of unmanned agricultural vehicles, and improves the efficiency of fertilization and irrigation.

Description of drawings

The technical solutions and other beneficial effects of the present application will be apparent through a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings.

In the attached picture:

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is a schematic side structural view of the present invention;

Figure 3 is a side two-dimensional schematic diagram of the present invention;

Figure 4 is a top two-dimensional schematic diagram of the present invention;

Figure 5 is a schematic diagram of the irrigation pipeline system of the present invention;

In the picture: 1. Unmanned agricultural vehicle; 2. Feed pipe; 3. Suction pipe; 4. Fertilizer tank; 5. Water tank two; 6. Water tank one; 7. Fertilizer pipe one; 8. Liquid pump two; 9. Fertilizer pipe two; 10. Liquid pump three; 11. Central pipe; 12. Liquid pump four; 13. Electronic control valve four; 14. Electronic control valve three; 15. Bidirectional suction pump; 16. Water inlet pipe two; 17. Water inlet pipe one; 18. Liquid pump one; 19. Electronic control valve two; 20. Electronic control valve one two; 21. Water outlet pipe one; 22. Water outlet pipe two; 23. Concentration detector; 24. Flow control valve.

Detailed ways

The following disclosure provides many different embodiments or examples for implementing the various structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the application. Furthermore, this application may repeat reference numbers and/or reference letters in different examples, such repetition being for the purposes of simplicity and clarity and does not by itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, this application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

As shown in Figures 1 and 2, the present invention provides a technical solution: an irrigation system suitable for unmanned agricultural machinery operations, including an unmanned agricultural vehicle 1 and an irrigation pipeline system. The irrigation pipeline system is provided on the unmanned agricultural vehicle 1. Internally, the unmanned agricultural vehicle 1 is equipped with a radio communication control system, which is electrically connected to the wireless terminal. It controls the operation and irrigation of the unmanned agricultural vehicle 1 through signal transmission. The wireless control system is an existing technology and therefore does not require too much effort. To go into details, the top of the unmanned agricultural vehicle 1 is equipped with an irrigation spraying device. The irrigation spraying device is connected to the irrigation pipeline system through pipelines. By switching the pipeline system, both the fertilizing liquid and water of the irrigation device can be sprayed, improving the unmanned operation of the vehicle. The utilization rate of the agricultural vehicle 1. It should be noted that the irrigation spray device is a common spray device, so I will not go into too much detail here. The bottom of the unmanned agricultural vehicle 1 is provided with a water suction pipe 3, through which the water in the ditch is The water is pumped into the irrigation pipeline system and then sprayed out through the irrigation spray device. The head of the unmanned agricultural vehicle 1 is provided with a feed pipe 2 for pouring the fertilizer liquid into the irrigation pipeline system.

As shown in Figures 3 and 4, the irrigation pipeline system includes a fertilizer tank 4, a water tank 6 and a water tank 2 5. The fertilizer tank 4 is arranged on the head of the unmanned agricultural vehicle 1 and runs through the feed pipe 2. The water tank One 6 and two water tanks 5 are arranged at the rear of the unmanned agricultural vehicle 1 and are arranged side by side.

As shown in Figure 5, a fertilizer pipe 7 is connected between the fertilizer tank 4 and a water tank 6. A liquid pump 2 8 is connected to the fertilizer pipe 7. A fertilizer pipe 9 is connected between the fertilizer tank 4 and the water tank 2 5. The fertilizer pipe 2 9 is connected to a liquid pump 3 10 , one side of the water tank 6 is connected to a water outlet pipe 21 , one side of the water tank 2 5 is connected to a water outlet pipe 22 , and the connection between the water outlet pipe 21 and the water outlet pipe 2 22 There is a liquid outlet pipe connected through the tee. The liquid outlet pipe is connected to the irrigation spray device. The liquid outlet pipe is connected to a liquid pump 18. The outlet pipe 21 is connected to an electronically controlled valve 20. The outlet pipe 22 is connected to an electronically controlled valve. 2. 19. Both the water tank 1 6 and the water tank 2 5 are provided with stirring devices (not shown in the figure), which are used to stir the fertilizing liquid and water so that the two are evenly mixed.

The other side of the water tank one 6 is connected to a water inlet pipe 17, and the water inlet pipe 17 is connected to an electronic control valve three 14. The other side of the water tank two 5 is connected to a water inlet pipe 16, and the water inlet pipe 2 16 is connected to an electronic control valve. Valve four 13, water inlet pipe one 17 and water inlet pipe two 16 are connected to a central pipe 11 through a tee. The central pipe 11 is connected to a liquid pump four 12. The central pipe 11 is connected to the water suction pipe 3 for pumping water from the outside. The liquid is pumped into water tank one 6 and water tank two 5 through liquid pump four 12 respectively.

There is a pipeline connection between water tank one 6 and water tank two 5, and a bidirectional suction pump 15 and a flow control valve 24 are connected to the pipeline between water tank one 6 and water tank two 5;

Both the water tank one 6 and the water tank two 5 are provided with a concentration detector 23 and a liquid level sensor (not shown in the figure) for detecting the concentration of the mixed liquid in the water tank one 6 and the water tank two 5 and the water tank one 6 and the water tank two 5 The liquid level height.

Embodiment 1

In this embodiment, the irrigation system is used as follows:

Step 1: Before using the unmanned agricultural machine 1, pour the fertilizer solution into the fertilizer tank 4 through the feed pipe 2.

Step 2: Control the unmanned agricultural vehicle 1 to walk among agricultural crops, place the water suction pipe 3 in the ditch between the crops, start the liquid pump 4 12 to suck the water in the ditch into the water tank 1 6 and the water tank 2 5. Water is stored.

Step 3: Start the liquid pump 18 to pump the stored water into the irrigation spray device, and then spray it into the crops through the irrigation spray device to achieve irrigation water.

Specifically in this step, when the liquid level of the water in the water tank one 6 and the water tank two 5 is four-fifths of the height of the water tank, the electronic control valve four 13 is closed so that no more water enters the water tank two 5, and the water tank is closed at the same time. The electronically controlled valve two 19 prevents the water inside the water tank two 5 from being pumped out. The electronically controlled valve three 14 and the electronically controlled valve one 20 are always open, allowing water to enter the water tank one 6 all the time, and then pumped into the liquid outlet pipe from the water outlet pipe one 21, and then sprayed into the crops along with the irrigation spraying device;

Through this step, only water tank one 6 needs to be used for ordinary irrigation, while water tank two 5 is used for backup. The liquid level height of the water in water tank two 5 is four-fifths of the height of the water tank to facilitate subsequent pumping of the fertilizing liquid. .

Step 4: When it is necessary to fertilize, turn on the liquid pump three 10 and the liquid pump two 8 successively, and pump the fertilizing liquid in the fertilizer tank 4 through the fertilizer pipe two 9 and the fertilizer pipe one 7 into the water tank two 5 and the water tank one 6 to mix with water. The mixture is mixed to form a mixed liquid, which is then sprayed into crops through irrigation spraying devices to achieve irrigation and fertilization.

Specifically, in this step, when fertilizer is to be applied, the liquid pump three 10 is first started to pump the fertilizing liquid in the fertilizer tank 4 into the water tank two 5 to form a mixed liquid, and then the stirring device is turned on to stir the mixed liquid inside, so that The internal mixed liquid is more uniform. At this time, close the electronic control valve three 14 and the electronic control valve one 20. At the same time, ensure that four-fifths of the water in the water tank one 6 is filled. Open the electronic control valve two 19 and pump the water tank through the liquid pump one 18. The mixed liquid of 25 is pumped into the irrigation spray device through the outlet pipe to realize fertilization;

While using the mixed liquid in water tank two 5 to fertilize, start liquid pump two 8 to pump the fertilizing liquid into water tank one 6, and then stir the mixed liquid through the stirring device in water tank one 6. When the mixed liquid in water tank two 5 When the use is about to be completed, close the electronic control valve two 19, open the electronic control valve one 20, and pump the mixed liquid in the water tank one 6 into the irrigation spray device to realize fertilization. When using the mixed liquid in the water tank one 6, open the Electronically control valve four 13, pump the water in the ditch into water tank two 5, repeat the above steps of forming the mixed liquid in water tank two 5, so that the mixed liquid in water tank two 5 is formed, and the mixed liquid in water tank one 6 is used When finished, switch to the mixed liquid in the water tank 2 and 5. Through this step, the fertilizing liquid is always kept sufficient, and the fertilizing liquid can be provided in time to ensure the fertilizing efficiency.

Step 5: When fertilization is not needed, turn off liquid pump three 10 and liquid pump two 8, stop the fertilizer liquid from entering water tank one 6 and water tank two 5, repeat steps two and three to irrigate crops.

Specifically, in this step, when the mixed liquid in the water tank one 6 is used during fertilization, the liquid pump three 10 is turned off at this time, the transmission of the fertilizing liquid to the inside of the water tank two 5 is stopped, the electronic control valve four 13 is opened, and the ditch is The water is input into the water tank two 5, so that the water tank two 5 is filled with the water that needs to be used. When fertilization is not required, close the electronic control valve one 20, open the electronic control valve two 19, and pass the water in the water tank two 5 through the irrigation spray device Spray into crops to switch between irrigation and fertilization.

Through the above steps, the switching between irrigation and fertilization is realized, ensuring the utilization rate of unmanned agricultural vehicles, and improving the efficiency of fertilization and irrigation;

It should be noted that in this embodiment, the ratio of the fertilizing liquid and water in the fertilizing mixed liquid is set by the staff. The concentration values of the mixed liquid are detected by the concentration detector 23. The staff sets standards in the radio communication control system. Concentration value A, when the concentration value of the mixed liquid in the water tank reaches the standard concentration value A, stop transmitting the fertilizer liquid to ensure the concentration of the mixed liquid in the water tank. The water tank here includes water tank one 6 and water tank two 5.

Embodiment 2

In this embodiment, it is necessary to ensure the concentration value of the water in the water tank during the switching process from irrigation fertilization liquid to irrigation water. Since fertilizing liquid will remain in the water tank when switching, if the concentration of the residual mixed liquid in the irrigation water is high, it will affect the growth of subsequent crops. Therefore, it is necessary to determine the concentration of the mixed liquid remaining in the water tank when switching;

Specifically, when the mixed liquid in water tank one 6 is used during fertilization, the water in the ditch is filled into the inside of water tank two 5, and the concentration value inside is detected by the concentration detector 23 in water tank two 5. Since the staff is Concentration value B is set in the radio communication control system. The concentration of concentration value B is smaller than the standard concentration value A, which is different from the concentration value A of the mixed solution during fertilization.

When the concentration value detected at this time is less than the concentration value B, the crop irrigation is switched according to step 5 in the first embodiment. When the concentration value detected is higher than the concentration value B, the bidirectional suction pump 15 is controlled to open, and the water tank 2 5 Part of the water in the water tank is pumped into the water tank one 6, and then the electronic control valve four 13 is opened to continue to input water, diluting the water in the water tank two 5, until the concentration monitor 23 in the water tank two 5 detects the concentration value in the water tank two 5 When the concentration value is lower than B, the two-way suction pump 15 is turned off, and then the electronically controlled valve 219 is opened to irrigate the crops.

The concentration detector 23 in the water tank 6 detects the concentration value of the water in the water tank 6 and compares it with the concentration value B. When the concentration value of the water in the water tank 6 is higher than the concentration value B, the electronic control valve 3 is opened at the same time. 14. Transfer the water from the ditch to the inside of the water tank 6 for dilution, ensuring that the concentration value of the water in the water tank 6 is lower than the concentration value B.

When the water in the water tank 6 reaches four-fifths of the liquid level, and the concentration value of the water in the water tank 6 is still higher than the concentration value B, close the electronically controlled valve 3 14 and open the bidirectional suction pump 15 , pump the water in water tank one 6 into water tank two 5, open the flow control valve 24, and control the flow into water tank two 5 to avoid inputting too much water and causing the concentration value in water tank two 5 to be greater than the concentration value B. When the water in the water tank one 6 becomes less, the electronically controlled valve three 14 is opened again to allow water to enter the inside of the water tank one 6 for dilution again, ensuring that the water concentration in the water tank one 6 is lower than the concentration value B.

When the water in water tank one 6 enters water tank two 5, the concentration detector in water tank two 5 detects the internal concentration value in real time to prevent the concentration value in water tank two 5 from being higher than concentration value B. If it is higher than concentration value B, , the two-way suction pump 15 and the flow control valve 24 can be closed.

Through the above steps, when the irrigation fertilization liquid is switched to irrigation water, it is avoided that the high concentration value of the fertilization liquid in the water causes excessive crop nutrition and reduces the growth rate of the crops.

Embodiment 3

In this embodiment, it is determined whether there is dirt inside the water tank one 6 and the water tank two 5. When there is dirt inside the water tank one 6 and the water tank two 5, and at the same time when the stirring device is started, the dirt will easily fall off into the fertilizing liquid, thus Affect the quality of fertilizing solution;

Specifically, since the ratio of fertilizing liquid and water in the fertilizing mixture is set by the staff, the ratio of fertilizing liquid and water is quantitative, so that the height of the mixed liquid is also quantitative. The mixed liquid is normally in the water tank. The liquid level height is a. The liquid level sensor detects the height of the mixed liquid in the water tank in real time. If the height of the mixed liquid in the water tank detected in real time is greater than the liquid level height a under normal circumstances in a quantitative ratio, it means that the liquid level in the water tank is Contains dirt, at this time, the signal is transmitted to the radio communication control system, causing it to alarm and notify the staff that there is dirt in the water tank, so that the internal dirt can be removed and the quality of the fertilizer solution can be improved.

In the description of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, an internal connection between two elements, or an interactive relationship between two elements. For those of ordinary skill in the art, the meanings of the above terms in this application can be understood according to specific circumstances.

The above is a detailed introduction to an irrigation system suitable for unmanned agricultural machinery operations provided by the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only for assistance. Understand the technical solutions and core ideas of this application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or Substitution does not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of each embodiment of the present application.

Claims (5)

1. An irrigation system suitable for unmanned agricultural machinery operations, including an unmanned agricultural vehicle (1) and an irrigation pipeline system, characterized in that: the irrigation pipeline system is arranged inside the unmanned agricultural vehicle (1), so The irrigation pipeline system includes a fertilizer tank (4), a water tank (6) and a water tank (5). The fertilizer tank (4) is installed on the head of the unmanned agricultural vehicle (1), and the water tank (1) 6) and water tank two (5) are arranged behind the unmanned agricultural vehicle (1); A fertilizer pipe (7) is connected between the fertilizer tank (4) and the water tank (6). A liquid pump (8) is connected to the fertilizer pipe (7). The fertilizer tank (4) is connected to the water tank (6). There is a fertilizer pipe two (9) connected between the two water tanks (5), a liquid pump three (10) is connected to the fertilizer pipe two (9), and a water outlet pipe one (6) is connected to one side of the water tank one (6). 21), one side of the water tank two (5) is connected to a water outlet pipe two (22), and the connection between the water outlet pipe one (21) and the water outlet pipe two (22) is connected to a liquid outlet pipe through a tee, so The liquid outlet pipe is connected to liquid pump one (18), the water outlet pipe one (21) is connected to electronically controlled valve one (20), and the water outlet pipe two (22) is connected to electronically controlled valve two (19); The other side of the water tank one (6) is connected to a water inlet pipe (17). The water inlet pipe (17) is connected to an electronically controlled valve three (14). The other side of the water tank two (5) There is a water inlet pipe two (16) connected to it, and an electronically controlled valve four (13) is connected to the water inlet pipe two (16). There is a pipeline connection between the water tank one (6) and the water tank two (5). A bidirectional suction pump (15) and a flow control valve (24) are connected to the pipeline between water tank one (6) and water tank two (5). Both water tanks one (6) and two water tanks (5) are provided with Concentration detector (23) and liquid level sensor. 2. An irrigation system suitable for unmanned agricultural machinery operations according to claim 1, characterized in that: the first water inlet pipe (17) and the second water inlet pipe (16) are connected to a central pipe (11) through a tee. , the central tube (11) is connected with four liquid pumps (12). 3. An irrigation system suitable for unmanned agricultural machinery operations according to claim 2, characterized in that: a water suction pipe (3) is provided at the bottom of the unmanned agricultural vehicle (1), and the unmanned agricultural vehicle (1) 1) The head of the car is provided with a feed pipe (2), and the central pipe (11) is connected to the water suction pipe (3). 4. The method of using an irrigation system suitable for unmanned agricultural machinery operations according to claim 3, characterized in that: the method includes the following steps: Step 1: Before using the unmanned agricultural machine (1), pour the fertilizer solution into the fertilizer tank (4) through the feed pipe (2); Step 2: Control the unmanned agricultural vehicle (1) to walk among agricultural crops, place the water suction pipe (3) in the ditch between the crops, start the liquid pump four (12) to suck the water in the ditch into the water tank one ( 6) and water tank two (5) to store water; Step 3: Start liquid pump one (18) to pump the stored water into the irrigation spray device, and then spray it into the crops through the irrigation spray device to achieve irrigation water; Step 4: When it is necessary to fertilize, turn on liquid pump three (10) and liquid pump two (8) to pump the fertilizing liquid in the fertilizer tank (4) through fertilizer pipe two (9) and fertilizer pipe one (7). Mix with water in water tank two (5) and water tank one (6) to form a mixed liquid, which is then sprayed into the crops through the irrigation spray device to realize irrigation and fertilization; Step 5: When fertilization is not needed, turn off liquid pump three (10) and liquid pump two (8), stop the fertilizer liquid from entering water tank one (6) and water tank two (5), and repeat steps two and three. , to irrigate crops. 5. The method of using an irrigation system suitable for unmanned agricultural machinery operations according to claim 4, characterized in that it also includes a switching process: S1. When the mixed liquid in water tank one (6) is used during fertilization, the water in the ditch is filled into the inside of water tank two (5), and the concentration detector (23) in water tank two (5) detects the internal concentration. Concentration value, because the staff sets the concentration value B in the radio communication control system; S2. When the detected concentration is higher than the concentration value B, control the two-way suction pump (15) to open, pump part of the water in the water tank 2 5 into the water tank 1 (6), and then open the electronic control valve 4 (13) Continue to input water to dilute the water in water tank two (5) until the concentration monitor (23) in water tank two (5) detects that the concentration value in water tank two (5) is lower than the concentration value B, then the two-way suction is turned off. pump (15), and then open the electronically controlled valve two (19) to irrigate crops; S3. The concentration detector (23) in the water tank one (6) detects the concentration value of the water in the water tank one (6) and compares it with the concentration value B. When the concentration value of the water in the water tank one (6) is higher than the concentration value At time B, open the electronic control valve three (14) at the same time to transfer the water from the ditch to the inside of the water tank one (6) for dilution, ensuring that the concentration value of the water in the water tank one (6) is lower than the concentration value B.