Method for adjusting conductivity of fertilizer and movable irrigation head

Abstract

The invention provides a method for adjusting the conductivity of a fertilizer and a movable irrigation head, and is applied to the field of agriculture. As the jurisdiction range of the fixed type head part is limited, and the movable type irrigation head part is more applied to agricultural production, the movable type irrigation head part provided by the invention can automatically adjust the conductivity of the fertilizer, the conductivity of the fertilizer is not too high on the premise of ensuring the fertilization effect, the seedling burning problem is avoided, the adjustment process is automatic, and the operation is simple and convenient. Operation by agricultural producers is not needed, and development of intelligent agriculture is promoted.

Description

Technical Field

[0001] The present application relates to the field of agricultural technology, and more particularly, to a method for adjusting the electrical conductivity of fertilizers and a mobile irrigation head. Background Art

[0002] Fixed headers are generally fixed pump houses designed according to field well houses or irrigation rivers and channels. They are the core system of water supply and fertilization of field irrigation systems. However, the scope of jurisdiction of fixed headers is limited, usually less than 500 mu, and the maximum is generally no more than 1,000 mu. The main reasons for the limited scope of jurisdiction of fixed headers are as follows: 1. The groundwater or water supply system is insufficient, and it is difficult to meet the large-scale field irrigation needs; 2. The area is too large, and the water pump of the fixed header is required to be high. The water pump has a large power and a thick pipe diameter, and the pump house has a high investment cost and high maintenance cost; 3. The area is too large, and the field pipe network is too complicated. The farther away from the pump house, the greater the pressure loss, and it is difficult to ensure the balance of pressure and flow in each irrigation area. Therefore, more and more agricultural producers have begun to choose mobile headers. However, the functions of current mobile headers are relatively single, especially when fertilizing, the electrical conductivity (EC) of the fertilizer needs to be manually adjusted by agricultural producers, which is time-consuming and labor-intensive. Based on this, how to achieve automatic adjustment of EC has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] The present application provides a method for adjusting the electrical conductivity of fertilizer and a mobile irrigation head, which can automatically adjust the electrical conductivity of fertilizer. Under the premise of ensuring the fertilization effect, the electrical conductivity of fertilizer will not be too high to avoid the problem of burning seedlings. The adjustment process is automatic and does not require operation by agricultural producers, which helps to promote the development of smart agriculture.

[0004] In a first aspect, a method for adjusting the conductivity of fertilizer is provided, the method being applied to a mobile irrigation head, the method comprising: in response to a first instruction, starting a pump (1428) and a fertilizer suction port valve (1427) in a first operating condition, wherein the first instruction is used to instruct the start of fertilization, the pump (1428) is used to suck fertilizer, the fertilizer suction port valve (1427) is a ball valve, the frequency of the pump (1428) corresponding to the first operating condition is full frequency, and the fertilizer suction port valve (1427) is The opening is the minimum opening; when it is detected that the conductivity of the fertilizer is greater than the target value, the frequency of the pump (1428) is reduced so that the difference between the conductivity and the target value is less than or equal to a first threshold value; or when it is detected that the conductivity is less than the target value, the opening of the fertilizer inlet valve (1427) is first increased to make the conductivity greater than the target value, and after the conductivity is greater than the target value, the frequency of the pump (1428) is reduced so that the difference between the conductivity and the target value is less than or equal to the first threshold value.

[0005] In the embodiment of the present application, after the mobile irrigation head receives the first instruction, the pump can be turned on at full frequency and the fertilizer inlet valve can be opened at a minimum opening. When it is detected that the conductivity of the fertilizer is greater than the target value, the conductivity can be reduced by reducing the frequency of the pump. When it is detected that the conductivity of the fertilizer is less than the target value, the opening of the fertilizer inlet valve can be increased to make the conductivity of the fertilizer greater than the target value, and then the conductivity can be reduced by reducing the frequency of the pump so that the difference between the conductivity and the target value is less than or equal to the first threshold.

[0006] In combination with the first aspect, in certain implementations of the first aspect, after reducing the frequency of the pump (1428), or first increasing the opening of the fertilizer inlet valve (1427) and then reducing the frequency of the pump (1428), the method further comprises: when it is detected that the conductivity is greater than the target value, reducing the frequency of the pump (1428), or reducing the opening of the fertilizer inlet valve (1427), or first reducing the opening of the fertilizer inlet valve (1427), and when the conductivity is less than the target value After that, the frequency of the pump (1428) is increased so that the difference between the conductivity and the target value is less than or equal to the first threshold value; when it is detected that the conductivity is less than the target value, the frequency of the pump (1428) is increased, or the opening of the fertilizer intake valve (1427) is increased, or the opening of the fertilizer intake valve (1427) is first increased, and after the conductivity is greater than the target value, the frequency of the pump (1428) is reduced so that the difference between the conductivity and the target value is less than or equal to the first threshold value.

[0007] In combination with the first aspect, in certain implementations of the first aspect, when it is detected that the conductivity is greater than the target value, the frequency of the pump (1428) is reduced, or the opening of the fertilizer inlet valve (1427) is reduced, or the opening of the fertilizer inlet valve (1427) is first reduced, and after the conductivity is less than the target value, the frequency of the pump (1428) is increased, including: when the ratio of the conductivity to the target value is greater than a second threshold value, the opening of the fertilizer inlet valve (1427) is reduced, or the opening of the fertilizer inlet valve (1427) is first reduced, and after the conductivity is less than the target value, the frequency of the pump (1428) is increased; or when the ratio of the conductivity to the target value is less than or equal to the second threshold value, the frequency of the pump (1428) is reduced.

[0008] In combination with the first aspect, in certain implementations of the first aspect, when it is detected that the conductivity is less than the target value, the frequency of the pump (1428) is increased, or the opening of the fertilizer inlet valve (1427) is increased, or the opening of the fertilizer inlet valve (1427) is first increased, and after the conductivity is greater than the target value, the frequency of the pump (1428) is reduced, including: when the ratio of the conductivity to the target value is less than a third threshold value, the opening of the fertilizer inlet valve (1427) is increased, or the opening of the fertilizer inlet valve (1427) is first increased, and after the conductivity is greater than the target value, the frequency of the pump (1428) is reduced; or when the ratio of the conductivity to the target value is greater than or equal to the third threshold value, the frequency of the pump (1428) is increased.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the adjustment step of the fertilizer intake valve (1427) and the pump (1428) is determined based on the ratio of the conductivity to the target value.

[0010] In combination with the first aspect, in certain implementations of the first aspect, when it is detected that the conductivity of the fertilizer is greater than the target value, the frequency of the pump (1428) is reduced, including: when it is detected that the conductivity is greater than the target value, determining the reduction step of the pump (1428); and reducing the frequency of the pump (1428) according to the reduction step.

[0011] In combination with the first aspect, in certain implementations of the first aspect, determining the reduction step of the pump (1428) includes: determining the ratio of the conductivity to the target value; and determining the reduction step of the pump (1428) based on the ratio of the conductivity to the target value.

[0012] In combination with the first aspect, in certain implementations of the first aspect, when it is detected that the conductivity is less than the target value, the opening of the fertilizer intake port valve (1427) is first increased to make the conductivity greater than the target value, and after the conductivity is greater than the target value, the frequency of the pump (1428) is reduced, including: when it is detected that the conductivity is less than the target value, the increase step of the fertilizer intake port valve (1427) is determined, and after the conductivity is greater than the target value, the reduction step of the pump (1428) is determined; the opening of the fertilizer intake port valve (1427) is increased according to the increase step of the fertilizer intake port valve (1427), and after the conductivity is greater than the target value, the step of the pump (1428) is reduced according to the reduction step of the pump (1428).

[0013] In combination with the first aspect, in certain implementations of the first aspect, determining the increase step of the fertilizer intake valve (1427) and, after the conductivity is greater than the target value, determining the decrease step of the pump (1428), includes: determining the increase step of the fertilizer intake valve (1427) and the decrease step of the pump (1428) based on the ratio of the conductivity to the target value.

[0014] In a second aspect, a mobile irrigation head is provided, the mobile irrigation head comprising a mobile warehouse (110), an irrigation pipe system (120), a fertilizer system (130), and a fertilization irrigation control system (140); the mobile warehouse (110) is provided with a water inlet (111) and a water outlet (112); the water inlet (111) is connected to a water source, a water pump is provided in the water source, the water outlet (111) is connected to an irrigation channel in a farmland, the irrigation pipe system (120) is accommodated in the mobile warehouse (110), the irrigation pipe system (120) comprises a water inlet pipe (121) and a water outlet pipe (122); the water inlet pipe (121) is connected to the water inlet (111), and the water outlet pipe (122) is connected to the water inlet (111). (122) is connected to the water outlet (112), the fertilizer system (130) is accommodated in the mobile warehouse (110), the fertilizer system (130) comprises a fertilizer barrel (131) and a water injection pipe (132), the water injection pipe (132) is connected to the water outlet pipe (122) in the irrigation pipe system (120), and is used to inject water into the fertilizer barrel (131), the fertilization irrigation control system (140) is accommodated in the mobile warehouse (110), comprises a control module (141), a pipe assembly (142), the pipe assembly (142) is connected to the irrigation pipe system (120) and the fertilizer system (130), the pipe assembly (142) comprises: a water inlet assembly (1401), a water outlet assembly (1402), and a water inlet assembly (1403). The invention relates to an irrigation system (120) comprising an irrigation pipe system (120), a fertilizer absorption component (1403), and a fertilizer mixing component (1404); the water inlet component (1401) and the water outlet component (1402) are connected to the irrigation pipe system (120); the water inlet component (1401) comprises a water inlet sub-pipeline (1424); the water outlet component (1402) comprises a water outlet sub-pipeline (1425); the water inlet sub-pipeline (1424) and the water outlet sub-pipeline (1425) are connected to the water outlet pipe (122) of the irrigation pipe system (120); the fertilizer absorption component (1403) is connected to the fertilizer system (130); the fertilizer absorption component (1403) comprises a fertilizer absorption sub-pipeline (1426) and a fertilizer absorption port valve (1427); the fertilizer mixing component (1404 ... 1404) comprises: a pump (1428), a first fertilizer mixing pipe (1429) and a second fertilizer mixing pipe (1430), the fertilizer mixing component (1404) is provided with a conductivity detector (1433), one end of the first fertilizer mixing pipe (1429) is connected to the water inlet sub-pipeline (1424) and the fertilizer suction sub-pipeline (1426), the other end of the first fertilizer mixing pipe (1429) is connected to the pump (1428), one end of the second fertilizer mixing pipe (1430) is connected to the pump (1428), and the other end of the second fertilizer mixing pipe (1430) is connected to the water outlet sub-pipeline (1425), and the control module (141) is used to execute the first aspect and any possible implementation method of the first aspect.

[0015] In a third aspect, a mobile irrigation head is provided, the mobile irrigation head comprising a mobile warehouse (110), an irrigation pipe system (120), a fertilizer system (130), and a fertilization irrigation control system (140), wherein the irrigation pipe system (120), the fertilizer system (130), and the fertilization irrigation control system (140) are accommodated in the mobile warehouse (110), and the fertilization irrigation control system (140) comprises a control module (141), a pipe assembly (142), and the pipe assembly (143). The component (142) is connected to the irrigation pipe system (120) and the fertilizer system (130) to mix water and fertilizer. The pipe component (142) includes a fertilizer inlet valve (1427) and a pump (1428). The fertilizer inlet valve (1427) and the pump (1428) are used to control the flow of fertilizer. The pipe component (142) is provided with a conductivity detector (1433). The control module (141) is used to execute the first aspect and any possible implementation method of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural block diagram of a mobile irrigation head provided in an embodiment of the present application.

[0017] Figure 2 It is a schematic side view of a mobile warehouse provided in an embodiment of the present application.

[0018] Figure 3 It is a schematic three-dimensional structural diagram of the irrigation head provided in an embodiment of the present application.

[0019] Figure 4 It is another schematic three-dimensional structural diagram of the irrigation head provided in an embodiment of the present application.

[0020] Figure 5 It is a schematic stereoscopic diagram of a pipeline component in a fertilization and irrigation control system provided in an embodiment of the present application.

[0021] Figure 6 yes Figure 5 A partial enlarged schematic diagram of part A.

[0022] Figure 7 It is a schematic flow chart of the method for adjusting the electrical conductivity of fertilizer provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0024] The terms used in the following embodiments are only for the purpose of describing specific embodiments, and are not intended to be used as limitations on the present application. As used in the specification and the appended claims of the present application, the singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" refer to one, two or more. The term "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0025] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0026] Fixed headers are generally fixed pump houses designed according to field well houses or irrigation rivers and channels. They are the core system of water supply and fertilization of field irrigation systems. However, the scope of jurisdiction of fixed headers is limited, usually less than 500 mu, and the maximum is generally no more than 1,000 mu. The main reasons for the limited scope of jurisdiction of fixed headers are as follows: 1. The groundwater or water supply system is insufficient, and it is difficult to meet the large-scale field irrigation needs; 2. The area is too large, and the water pump of the fixed header is required to be high. The water pump has a large power and a thick pipe diameter, and the pump house has a high investment cost and high maintenance cost; 3. The area is too large, and the field pipe network is too complicated. The farther away from the pump house, the greater the pressure loss, and it is difficult to ensure the balance of pressure and flow in each irrigation area. Therefore, more and more agricultural producers have begun to choose mobile headers. However, the functions of current mobile headers are relatively single, especially when fertilizing, the electrical conductivity (EC) of the fertilizer needs to be manually adjusted by agricultural producers, which is time-consuming and labor-intensive. Based on this, how to achieve automatic adjustment of EC has become a technical problem that needs to be solved urgently.

[0027] The following will first combine Figure 1-Figure 6The mobile irrigation head provided in the embodiment of the present application is introduced.

[0028] Figure 1 A schematic structural diagram of a mobile irrigation head provided in an embodiment of the present application is shown.

[0029] like Figure 1 As shown, the mobile irrigation head 100 includes: a mobile warehouse 110, an irrigation pipe system 120, a fertilizer system 130 and a fertilization and irrigation control system 140.

[0030] The mobile warehouse 110 is provided with a water inlet and a water outlet. The water inlet is connected to a water source in which a water pump is provided, and the water outlet is connected to an irrigation channel in the farmland.

[0031] The irrigation pipe system 120 is accommodated in the mobile bin 110. The irrigation pipe system 120 includes an inlet pipe, an outlet pipe and a filter assembly, wherein the inlet pipe is connected to the water inlet of the mobile bin 110, the outlet pipe is connected to the water outlet of the mobile bin 110, and the filter assembly is connected between the inlet pipe and the outlet pipe.

[0032] The fertilizer system 130 is accommodated in the mobile warehouse 110. The fertilizer system 130 includes a fertilizer barrel and a water injection pipe, and the water injection pipe is connected to the water outlet pipe in the irrigation pipe system 120 for injecting water into the fertilizer barrel.

[0033] The fertilization and irrigation control system 140 is also contained in the mobile bin 110. The fertilization and irrigation control system 140 includes a control module and a pipeline assembly, and the pipeline assembly is connected to the above-mentioned irrigation pipeline system 120 and the fertilizer system 130 to achieve fertilizer mixing. The control module is used to control the water pump adjustment module to adjust the irrigation parameters of the irrigation head 100, and is used to control the pipeline assembly to adjust the fertilization parameters of the irrigation head 100.

[0034] As an example, Figure 2 A schematic side view of a mobile bin 110 is shown.

[0035] like Figure 2 As shown, a water inlet 111 and a water outlet 112 may be provided on the same side wall of the mobile warehouse 110. The water inlet 111 may be connected to a water source through a pipe, and water in the water source may enter the water inlet 111 through a pipe under the action of a water pump. The water outlet 112 may be connected to an irrigation channel in a farmland through a pipe. The water entering through the water inlet 111 may be processed by various systems inside the mobile warehouse 110, and then may flow out through the water outlet 112, thereby realizing precise irrigation and fertilization of crops in the farmland.

[0036] In addition to the water inlet 111 and the water outlet 112, the mobile warehouse 110 may also be provided with a power interface, a water pump control interface, etc., for connecting a power line and a water pump control line, etc. The power line and the water pump control line may be connected to the control system inside the mobile warehouse 110 through the interface on the mobile warehouse 110.

[0037] The irrigation pipe system 120 includes: an inlet pipe, an outlet pipe and a filter assembly; the inlet pipe can be connected to the water inlet 111 of the mobile warehouse 110, and the outlet pipe can be connected to the water outlet 112 of the mobile warehouse 110. A filter assembly is connected between the inlet pipe and the outlet pipe, and the filter assembly is used to filter the water entering through the inlet pipe, so that the filtered water flows into the farmland through the outlet pipe for irrigation.

[0038] The fertilizer system 130 includes: a fertilizer barrel and a water injection pipe, wherein the fertilizer barrel is used to contain source fertilizer, the water injection pipe can be arranged corresponding to the inlet of the fertilizer barrel, and the water injection pipe can be connected to the outlet pipe of the irrigation pipe system 120. In addition to flowing into the farmland for irrigation, the water in the outlet pipe can also flow into the fertilizer barrel through the water injection pipe to dilute the source fertilizer in the fertilizer barrel, thereby adjusting the parameters of the fertilizer, such as electrical conductivity (EC), potential of hydrogen (PH), etc.

[0039] In the irrigation head 100, in addition to the mobile bin 110, the irrigation pipe system 120 and the fertilizer system 130, it also includes a core part - a fertilization irrigation control system 140. The fertilization irrigation control system 140 can be used to control the fertilization parameters of the irrigation head 100, wherein the fertilization parameters may include the EC of the fertilizer.

[0040] Specifically, the fertilization and irrigation control system 140 may include a control module and a pipeline assembly. The pipeline assembly may include a plurality of pipelines and valves and other components for connecting the irrigation pipeline system 120 and the fertilizer system 130. Specifically, the pipeline assembly may be connected to the water outlet pipeline in the irrigation pipeline system 120 and the fertilizer barrel in the fertilizer system 130.

[0041] In addition, since the pipeline assembly is connected to the irrigation pipeline system 120 and the fertilizer system 130 to achieve fertilizer mixing, the control module can also be used to control components in the pipeline assembly (such as valves, etc.) to control the ratio of water and fertilizer during the fertilizer mixing process and the time of adding water or fertilizer, thereby controlling and adjusting the fertilization parameters of the irrigation head 100.

[0042] As an example and not a limitation, the above-mentioned control module includes but is not limited to: a programmable logic controller (PLC), a programmable automation controller (PAC), an embedded controller, etc. The embodiments of the present application do not limit the specific type of the control module.

[0043] Figure 3 A schematic three-dimensional structural diagram of the irrigation head 100 provided in an embodiment of the present application is shown. In this schematic diagram, in order to facilitate observation of various system structures inside the mobile warehouse 110, the four side walls and the top wall of the mobile warehouse 110 are hidden, and only the bottom plate of the mobile warehouse 110 and related structures such as the traction structure are retained.

[0044] See also Figure 3 The interior of the irrigation head 100 mainly contains three parts: an irrigation pipe system 120, a fertilizer system 130 and a fertilization and irrigation control system 140.

[0045] Next, first combine Figure 3 The specific structure of the irrigation pipe system 120 in the irrigation head 100 is introduced.

[0046] like Figure 3 As shown, the irrigation pipe system 120 mainly includes: an inlet pipe 121 , an outlet pipe 122 , and an intermediate pipe 123 .

[0047] Next, combine Figure 3 The specific structure of the fertilizer system 130 in the irrigation head 100 is introduced.

[0048] like Figure 3 As shown, the fertilizer system 130 mainly includes: a fertilizer barrel 131 and a water injection pipe 132. The fertilizer barrel 131 can be arranged between the water inlet pipe 121 and the water outlet pipe 122 in the irrigation pipe system 120. One end of the water injection pipe 132 can be connected to the top of the fertilizer barrel 131, and the other end can be connected to the water outlet pipe 122 in the irrigation pipe system 120, so that the aqueous solution flowing out of the water outlet pipe 122 can enter the fertilizer barrel 131 through the water injection pipe 132 to dilute the source fertilizer in the fertilizer barrel 131.

[0049] Optionally, a water injection valve may be provided on the water injection pipe 132. The water injection valve may be connected to the fertilization and irrigation control system 140 by wire or wirelessly, so that the fertilization and irrigation control system 140 controls the switch state of the water injection valve, thereby controlling the dilution of the fertilizer in the fertilizer barrel 131.

[0050] Figure 4FIG. 2 shows another schematic three-dimensional structural diagram of the irrigation head 100 provided in an embodiment of the present application. Figure 4 and Figure 3 It is a stereoscopic image of the same irrigation head 100 at different viewing angles.

[0051] like Figure 4 As shown, the fertilization and irrigation control system 140 may be an integrated machine for implementing fertilization and irrigation and water pump regulation. Specifically, the fertilization and irrigation control system 140 may include: a control module 141 and a pipeline component 142.

[0052] As described above, the control module 141 may include, for example, a control system of a type such as a PLC.

[0053] The pipe assembly 142 can be connected to the irrigation pipe system 120 and the fertilizer system 130 through external connecting pipes. Specifically, the pipe assembly 142 may include a water inlet sub-pipeline, a water outlet sub-pipeline, and a fertilizer suction sub-pipeline, and the three sub-pipelines can be connected to the irrigation pipe system 120 and the fertilizer system 130 through three connecting pipes, respectively.

[0054] Figure 5 A schematic three-dimensional diagram of a pipeline assembly 142 in a fertilization and irrigation control system 140 provided in an embodiment of the present application is shown. In this schematic diagram, in order to facilitate observation of the specific structure of the pipeline assembly 142, the left side wall of the cabinet where the pipeline assembly 142 is located is hidden.

[0055] like Figure 5 As shown, the pipeline component 142 includes: a water inlet component 1401, a water outlet component 1402, a fertilizer absorption component 1403 and a fertilizer mixing component 1404. The water inlet component 1401 and the water outlet component 1402 are connected to the irrigation pipeline system 120, the fertilizer absorption component 1403 is connected to the fertilizer system 130, and the fertilizer mixing component 1404 is used to mix the water in the water inlet component 1401 and the fertilizer in the fertilizer system 130 to transmit them to the water outlet component 1402.

[0056] Figure 6 Shows Figure 5 A partial enlarged schematic diagram of part A.

[0057] like Figure 6 As shown, Figure 6 The water inlet component 1401 may include: a water inlet sub-pipeline 1424 , and a water inlet 1421 of the water inlet sub-pipeline 1424 is connected to the water outlet pipe 122 of the above-mentioned irrigation pipe system 120 .

[0058] Figure 6The water outlet assembly 1402 may include: a water outlet sub-pipe 1425, the water outlet 1422 of which is connected to the water outlet pipe 122 of the irrigation pipe system 120. Optionally, the position where the water outlet 1422 is connected to the water outlet pipe 122 may be located upstream of the position where the water inlet 1421 is connected to the water outlet pipe 122.

[0059] Continue to see Figure 6 , the above Figure 5 The fertilizer suction component 1403 may include: a fertilizer suction sub-pipeline 1426, and a fertilizer suction port 1423 of the fertilizer suction sub-pipeline 1426 is connected to the fertilizer barrel 131 of the above-mentioned fertilizer system 130.

[0060] The fertilizer suction sub-pipeline 1426 may be provided with a fertilizer suction port valve 1427, which may control the flow of fertilizer passing through the fertilizer suction sub-pipeline 1426. In some examples, the fertilizer suction port valve 1427 may be an electric ball valve, in which the opening ratio of the valve may be controlled by controlling the rotation of the ball in the valve.

[0061] In some embodiments, the fertilizer intake valve 1427 can be connected to the control module 141 in the fertilization and irrigation control system 140 by wire or wireless means, and the control module 141 can control the opening ratio of the fertilizer intake valve 1427, thereby controlling the flow rate of the fertilizer in the fertilizer intake sub-pipeline 1426 to control the EC of the fertilizer in the irrigation head 100.

[0062] Continue to see Figure 6 As shown above Figure 5 The fertilizer mixing component 1404 includes: a pump 1428, a first fertilizer mixing pipe 1429 and a second fertilizer mixing pipe 1430, one end of the first fertilizer mixing pipe 1429 is connected to the water inlet sub-pipeline 1424 and the fertilizer suction sub-pipeline 1426, the other end of the first fertilizer mixing pipe 1429 is connected to the pump 1428, one end of the second fertilizer mixing pipe 1430 is connected to the pump 1428, and the other end of the second fertilizer mixing pipe 1430 is connected to the water outlet sub-pipeline 1425. The control module 141 can control the frequency of the pump 1428 to control the EC of the fertilizer of the irrigation head 100.

[0063] The first fertilizer mixing pipeline 1429 is located below the second fertilizer mixing pipeline 1430. The first fertilizer mixing pipeline 1429 is provided with a water outlet valve 1431. When the irrigation head 100 stops working, the water outlet valve 1431 is used to discharge the liquid remaining in the pump 1428.

[0064] Optionally, in the embodiment of the present application, the first fertilizer mixing pipe 1429 can be connected to the water inlet sub-pipeline 1424 and the fertilizer suction sub-pipeline 1426 through the ejector 1432.

[0065] Optionally, in addition to the components described above, the fertilizer mixing component 1404 is provided with an EC detector 1433 .

[0066] As an example, Figure 6 As shown, an EC detector 1433 may be provided in the fertilizer mixing component 1404, and the EC detector 1433 may detect EC. The detection inlet of the EC detector 1433 may be located in the water inlet sub-pipeline 1424, and the detection outlet of the EC detector 1433 may be located in the first fertilizer mixing pipe 1429. Specifically, the EC of the solution in the water inlet sub-pipeline 1424 detected by the EC detector 1433 is the EC of the fertilizer solution that enters the water outlet pipe 122 after fertilizer mixing, and thus can more effectively characterize the EC of the fertilizer solution provided to the farmland by the irrigation head 100.

[0067] Optionally, the EC detector may be connected to the control module 141 via a wired or wireless manner, so that the control module 141 may receive parameter values ​​detected in real time to control related components, thereby adjusting fertilization parameters of the irrigation head 100 .

[0068] Optionally, in some embodiments of the present application, the fertilization and irrigation control system 140 also includes: a wireless communication module, which is used to receive wireless control commands and transmit the wireless control commands to the control module 141, so that the control module 141 controls the EC of the fertilizer in the irrigation head 100 according to the wireless control commands.

[0069] As an example, the wireless communication module includes but is not limited to: a wireless local area network communication module, a wireless wide area network communication module, etc. Among them, the wireless wide area network communication module includes: a cellular network (for example: 2G, 3G, 4G, 5G, etc.) module, a satellite communication module, etc. The wireless local area network communication module includes: a Wi-Fi communication module, a Bluetooth communication module, etc. The embodiment of the present application does not limit the specific method of the wireless communication.

[0070] In a specific implementation, the user can send relevant instructions to the fertilization and irrigation control system 140 through an application (Application, App) on a smart terminal and a wireless network, so that the fertilization and irrigation control system 140 can control the EC of the fertilizer according to the user's instructions.

[0071] Optionally, in some embodiments of the present application, the fertilization and irrigation control system 140 further includes: a user interaction module for receiving user input commands and sending the input commands to the control module 141, so that the control module 141 can control the EC of the fertilizer of the irrigation head 100 according to the input commands.

[0072] As an example, return to Figure 4 and Figure 5As shown, in the fertilization and irrigation control system 140, the cabinet where the control module 141 is located may be provided with a display panel and user interaction modules such as buttons, and the user may input commands to the control module 141 through buttons or a display panel with a touch function, such as the target EC of the fertilizer.

[0073] It is understandable that the user interaction module can be various types of user input devices such as keyboards, microphones, handwriting boards, etc. in addition to the display panel and buttons shown in the figure, and this application does not make specific limitations on this.

[0074] Figure 7 FIG. 7 is a schematic flow chart of a method 700 for adjusting the electrical conductivity of fertilizer provided in an embodiment of the present application. The method 700 is applied to the mobile irrigation head mentioned above, such as Figure 7 As shown, the method 700 includes:

[0075] S701, in response to a first instruction, the pump 1428 and the fertilizer inlet valve 1427 are turned on in a first operating condition, wherein the first instruction is used to instruct the start of fertilization, the frequency of the pump 1428 corresponding to the first operating condition is full frequency, and the fertilizer inlet valve 1427 is at minimum opening.

[0076] After receiving the first instruction, the mobile irrigation head determines that the first instruction is used to start fertilization, and then starts the pump 1428 at full frequency and opens the fertilizer intake valve 1427 at the minimum opening.

[0077] In some embodiments, the minimum opening of the fertilizer inlet valve 1427 is 2%.

[0078] In some embodiments, the full frequency is 50 Hz.

[0079] In some embodiments, the first instruction may be issued by a user through a user interaction module.

[0080] In some embodiments, the first instruction may be issued by a smart agriculture processing platform, that is, the smart agriculture processing platform may detect various data in agricultural production, and when determining the need for fertilization based on the data, may issue a first instruction to a mobile irrigation head.

[0081] In some embodiments, the first instruction may be issued by a user through a terminal device.

[0082] S702, when it is detected that the conductivity of the fertilizer is greater than the target value, the frequency of the pump 1428 is reduced so that the difference between the conductivity and the target value is less than or equal to the first threshold value.

[0083] S703, when it is detected that the conductivity is less than the target value, the opening of the fertilizer intake valve 1427 is first increased to make the conductivity greater than the target value, and after the conductivity is greater than the target value, the frequency of the pump 1428 is reduced to make the difference between the conductivity and the target value less than or equal to the first threshold.

[0084] In the embodiment of the present application, the mobile irrigation head can adjust the pump 1428 and / or the fertilizer inlet valve 1427. It can be understood that when the frequency of the pump 1428 is reduced, the conductivity of the fertilizer decreases, and when the frequency of the pump 1428 is increased, the conductivity of the fertilizer increases. When the opening of the fertilizer inlet valve 1427 is reduced, the conductivity of the fertilizer decreases, and when the opening of the fertilizer inlet valve 1427 is increased, the conductivity of the fertilizer increases.

[0085] It can be understood that when the first threshold is 0, after the mobile irrigation head executes step S702 or S703, the conductivity of the fertilizer is equal to the target value.

[0086] In some embodiments, the first instruction includes a target value, and the mobile irrigation head can determine the target value through the first instruction.

[0087] The mobile irrigation head can detect the conductivity of the fertilizer when the duration of operating the pump 1428 and the fertilizer intake valve 1427 under the first working condition reaches a first duration.

[0088] In some embodiments, the first duration is 30 seconds.

[0089] When the mobile irrigation head detects that the conductivity of the fertilizer is greater than the target value, since the opening of the fertilizer intake valve 1427 is at the minimum opening and the frequency of the pump 1428 is at full frequency, the mobile irrigation head can reduce the frequency of the pump 1428, so that the difference between the conductivity of the fertilizer and the target value is less than or equal to the first threshold value.

[0090] In some embodiments, when the mobile irrigation head reduces the frequency of the pump 1428, the reduction step can be determined according to the ratio of the conductivity of the fertilizer to the target value. The reduction step of the pump 1428 can also be called the frequency reduction step.

[0091] In some embodiments, when the ratio of the electrical conductivity of the fertilizer to the target value is greater than 1.1, the decreasing step is 0.3 Hz.

[0092] In some embodiments, when the ratio of the electrical conductivity of the fertilizer to the target value is greater than or equal to 1.05 and less than or equal to 1.1, the decreasing step is 0.15 Hz.

[0093] In some embodiments, when the ratio of the electrical conductivity of the fertilizer to the target value is greater than 1 and less than or equal to 1.05, the decreasing step is 0.05 Hz.

[0094] In the embodiment of the present application, there is no specific limitation on the time length corresponding to reducing the stride length, and the time length corresponding to reducing the stride length can be determined according to factors such as the type of fertilizer, the size of the fertilizer particles, etc.

[0095] For example, when the fertilizer is liquid fertilizer, the duration corresponding to reducing the stride is duration #1, and when the fertilizer is granular fertilizer, the duration corresponding to reducing the stride is duration #2, and duration #1 is less than duration #2.

[0096] It is understandable that when the mobile irrigation head executes step S702, the step width of the reduction may be constant, or in other embodiments, when the mobile irrigation head executes step S702, the step width of the reduction may be variable.

[0097] For example, when the ratio of the conductivity of the fertilizer to the target value is greater than 1.1, the mobile irrigation head can first reduce the frequency of the pump 1428 with a reduction step of 0.3 Hz, and when the ratio of the conductivity of the fertilizer to the target value becomes greater than or equal to 1.05 and less than or equal to 1.1, the reduction step is adjusted from 0.3 Hz to 0.15 Hz. Similarly, when the ratio of the conductivity of the fertilizer to the target value becomes greater than or equal to 1 and less than or equal to 1.05, the reduction step is adjusted from 0.15 Hz to 0.05 Hz, that is, when the mobile irrigation head executes step S702, the reduction step can be variable and gradually reduced.

[0098] For another example, when the ratio of the electrical conductivity of the fertilizer to the target value is greater than or equal to 1 and less than or equal to 1.05, the reduction step is 0.05 Hz, that is, when the mobile irrigation head executes step S702, the reduction step may remain unchanged.

[0099] When the mobile irrigation head detects that the conductivity is less than the target value, since the opening of the fertilizer inlet valve 1427 is at the minimum opening and the frequency of the pump 1428 is at full frequency, in order to increase the conductivity of the fertilizer, the opening of the fertilizer inlet valve 1427 can be increased first to make the conductivity greater than the target value, and after the conductivity is greater than the target value, the frequency of the pump 1428 can be reduced so that the difference between the conductivity and the target value is less than or equal to the first threshold value.

[0100] In the embodiment of the present application, since the influence of the minimum adjustment opening of the fertilizer inlet valve 1427 on the conductivity of the fertilizer is greater than the influence of the minimum adjustment frequency of the pump 1428 on the conductivity of the fertilizer, the way in which the mobile irrigation head adjusts the opening of the fertilizer inlet valve 1427 is called coarse adjustment, and the way in which the mobile irrigation head adjusts the frequency of the pump 1428 is called fine adjustment. In other words, when the mobile irrigation head turns on the fertilization function, if it is detected that the conductivity of the fertilizer is less than or equal to the target value, coarse adjustment can be performed first, and then fine adjustment can be performed.

[0101] In some embodiments, when the mobile irrigation head increases the opening of the fertilizer intake valve 1427, the increase step can be determined according to the ratio of the conductivity of the fertilizer to the target value.

[0102] In some embodiments, when the ratio of the electrical conductivity of the fertilizer to the target value is less than 0.5, the increasing step is 10%.

[0103] In some embodiments, when the ratio of the electrical conductivity of the fertilizer to the target value is greater than or equal to 0.5 and less than 0.8, the increasing step is 5%.

[0104] In some embodiments, when the ratio of the electrical conductivity of the fertilizer to the target value is greater than or equal to 0.8 and less than 1, the increasing step is 2%.

[0105] It is understandable that when the mobile irrigation head executes step S703, the increase step may be constant, or in some other embodiments, when the mobile irrigation head executes step S703, the increase step may be variable.

[0106] For example, when the ratio of the electrical conductivity of the fertilizer to the target value is less than 0.5, the mobile irrigation head can first increase the opening of the fertilizer intake valve 1427 with an increase step of 10%. When the ratio of the electrical conductivity of the fertilizer to the target value becomes greater than or equal to 0.5 and less than 0.8, the increase step is adjusted from 10% to 5%. Similarly, when the ratio of the electrical conductivity of the fertilizer to the target value becomes greater than or equal to 0.8 and less than 1, the increase step is adjusted from 5% to 2%, that is, when the mobile irrigation head executes step S703, the increase step can be variable and gradually smaller.

[0107] For another example, when the ratio of the conductivity of the fertilizer to the target value is greater than or equal to 0.8 and less than 1, the increase step is 2%, that is, when the mobile irrigation head executes step S703, the increase step may remain unchanged.

[0108] It is understandable that since the minimum adjustment opening of the fertilizer intake valve 1427 has a greater impact on the conductivity of the fertilizer, when increasing the opening of the fertilizer intake valve 1427, the conductivity of the fertilizer may be greater than the target value. In this case, the mobile irrigation head may no longer adjust the opening of the fertilizer intake valve 1427, but instead reduce the frequency of the pump 1428.

[0109] It should be understood that when the mobile irrigation head determines that the conductivity of the fertilizer is greater than the target value, the frequency of the pump 1428 can be reduced in the manner described above. Please refer to the above for specific description, which will not be repeated here for the sake of brevity.

[0110] In the embodiment of the present application, after the mobile irrigation head receives the first instruction, the pump can be turned on at full frequency and the fertilizer inlet valve can be opened at a minimum opening. When it is detected that the conductivity of the fertilizer is greater than the target value, the conductivity can be reduced by reducing the frequency of the pump. When it is detected that the conductivity of the fertilizer is less than the target value, the opening of the fertilizer inlet valve can be increased to make the conductivity of the fertilizer greater than the target value, and then the conductivity can be reduced by reducing the frequency of the pump so that the difference between the conductivity and the target value is less than or equal to the first threshold.

[0111] It is described above that when the mobile irrigation head starts the fertilization function, the frequency of the pump 1428 and the opening of the fertilizer inlet valve 1427 can be adjusted so that the difference between the conductivity of the fertilizer and the target value is less than or equal to the first threshold. In other embodiments of the present application, the mobile irrigation head can also dynamically adjust the conductivity of the fertilizer during the execution of the fertilization function.

[0112] In some embodiments, after reducing the frequency of the pump 1428, or first increasing the opening of the fertilizer suction port valve 1427 and then reducing the frequency of the pump 1428, the method 700 further includes:

[0113] When it is detected that the conductivity is greater than the target value, the frequency of the pump 1428 is reduced, or the opening of the fertilizer intake valve 1427 is reduced, or the opening of the fertilizer intake valve 1427 is first reduced, and after the conductivity is less than the target value, the frequency of the pump 1428 is increased, so that the difference between the conductivity and the target value is less than or equal to the first threshold.

[0114] As described above, the mobile irrigation head adjusts the frequency of the pump 1428 and the opening of the fertilizer inlet valve 1427 when the fertilization function is turned on. Therefore, the frequency of the pump 1428 may no longer be the full frequency, and the opening of the fertilizer inlet valve 1427 may no longer be the minimum opening. When the mobile irrigation head performs the fertilization function, the conductivity of the fertilizer may fluctuate. When the conductivity is detected to be greater than the target value, the mobile irrigation head may reduce the frequency of the pump 1428, or reduce the opening of the fertilizer inlet valve 1427, or first reduce the opening of the fertilizer inlet valve 1427, and then increase the frequency of the pump 1428 after the conductivity is less than the target value.

[0115] It should be noted that the mobile irrigation head first reduces the opening of the fertilizer intake valve 1427, and after the conductivity is less than the target value, the frequency of the pump 1428 is increased because the fertilizer intake valve 1427 is a ball valve, and the minimum adjustment opening has a greater impact on the conductivity of the fertilizer. Therefore, in the process of reducing the opening, the conductivity of the fertilizer may be less than the target value. In this case, the frequency of the pump 1428 can be increased.

[0116] In the embodiment of the present application, during the fertilization process of the mobile irrigation head, when the conductivity of the fertilizer is greater than the target value, the above three methods can be adopted for adjustment. The mobile irrigation head can finally determine the adjustment method based on the ratio of the conductivity to the target value.

[0117] In some embodiments, when the ratio of conductivity to the target value is greater than a second threshold value, the mobile irrigation head can reduce the opening of the fertilizer intake valve 1427, or first reduce the opening of the fertilizer intake valve 1427, and then increase the frequency of the pump 1428 after the conductivity is less than the target value.

[0118] In some embodiments, when the ratio of the conductivity to the standard value is less than or equal to the second threshold, the mobile irrigation head can reduce the frequency of the pump 1428.

[0119] For example, when the ratio of the conductivity to the target value is greater than 1.1, the mobile irrigation head can reduce the opening of the fertilizer inlet valve 1427, or first reduce the opening of the fertilizer inlet valve 1427, and after the conductivity is less than the target value, increase the frequency of the pump 1428. When the ratio of the conductivity to the target value is less than or equal to 1.1, the mobile irrigation head can reduce the frequency of the pump 1428.

[0120] In some embodiments, when the mobile irrigation head reduces the frequency of the pump 1428, or reduces the opening of the fertilizer intake valve 1427, or first reduces the opening of the fertilizer intake valve 1427, and then increases the frequency of the pump 1428 after the conductivity is less than the target value, the corresponding adjustment step can be determined based on the ratio of the conductivity of the fertilizer to the target value, wherein the adjustment step includes a reduction step and an increase step.

[0121] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than 1.1, the pump 1428 is reduced in steps of 0.3 Hz.

[0122] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than or equal to 1.05 and less than or equal to 1.1, the reduction step of the pump 1428 is 0.15 Hz.

[0123] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than 1 and less than or equal to 1.05, the reduction step of the pump 1428 is 0.05 Hz.

[0124] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than 1.1, the reduction step of the fertilizer inlet valve 1427 is 10%.

[0125] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than or equal to 1.05 and less than or equal to 1.1, the decreasing step of the fertilizer inlet valve 1427 is 5%.

[0126] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than 1 and less than or equal to 1.05, the decreasing step of the fertilizer inlet valve 1427 is 2%.

[0127] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is less than 0.9, the increase step of the pump 1428 is 0.3 Hz.

[0128] In some embodiments, when the ratio of the electrical conductivity of the fertilizer to the target value is greater than or equal to 0.9 and less than or equal to 0.95, the increasing step of the pump 1428 is 0.15 Hz.

[0129] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than 0.95 and less than 1, the increase step of the pump 1428 is 0.05 Hz.

[0130] In some embodiments, after reducing the frequency of the pump 1428, or first increasing the opening of the fertilizer suction port valve 1427 and then reducing the frequency of the pump 1428, the method further includes:

[0131] When it is detected that the conductivity is less than the target value, the frequency of the pump 1428 is increased, or the opening of the fertilizer inlet valve 1427 is increased, or the opening of the fertilizer inlet valve 1427 is increased first, and after the conductivity is greater than the target value, the frequency of the pump 1428 is reduced, so that the difference between the conductivity and the target value is less than or equal to the first threshold value.

[0132] As described above, the mobile irrigation head adjusts the frequency of the pump 1428 and the opening of the fertilizer inlet valve 1427 when the fertilization function is turned on. Therefore, the frequency of the pump 1428 may no longer be the full frequency, and the opening of the fertilizer inlet valve 1427 may no longer be the minimum opening. When the mobile irrigation head performs the fertilization function, the conductivity of the fertilizer may fluctuate. When the conductivity is detected to be less than the target value, the mobile irrigation head may increase the frequency of the pump 1428, or increase the opening of the fertilizer inlet valve 1427, or first increase the opening of the fertilizer inlet valve 1427, and then reduce the frequency of the pump 1428 after the conductivity is less than the target value.

[0133] It should be noted that the mobile irrigation head first increases the opening of the fertilizer intake valve 1427, and after the conductivity is greater than the target value, the frequency of the pump 1428 is reduced because the fertilizer intake valve 1427 is a ball valve, and the minimum adjustment opening has a greater impact on the conductivity of the fertilizer. Therefore, in the process of reducing the opening, the conductivity of the fertilizer may be greater than the target value. In this case, the frequency of the pump 1428 can be further reduced.

[0134] In the embodiment of the present application, during the fertilization process of the mobile irrigation head, when the conductivity of the fertilizer is less than the target value, the above three methods can be adopted for adjustment. The mobile irrigation head can finally determine the adjustment method based on the ratio of the conductivity to the target value.

[0135] In some embodiments, when the ratio of the conductivity to the target value is less than a third threshold value, the mobile irrigation head can first increase the opening of the fertilizer intake valve 1427, and after the conductivity is greater than the target value, reduce the frequency of the pump 1428, or increase the opening of the fertilizer intake valve 1427.

[0136] In some embodiments, when the ratio of the conductivity to the marked value is greater than or equal to a third threshold, the frequency of pump 1428 is increased.

[0137] For example, when the ratio of the conductivity to the target value is less than 0.9, the mobile irrigation head can first increase the opening of the fertilizer inlet valve 1427, and after the conductivity is greater than the target value, reduce the frequency of the pump 1428, or increase the opening of the fertilizer inlet valve 1427. When the ratio of the conductivity to the target value is less than or equal to 0.9, the mobile irrigation head can increase the frequency of the pump 1428.

[0138] In some embodiments, when the mobile irrigation head increases the frequency of the pump 1428, or increases the opening of the fertilizer inlet valve 1427, or first increases the opening of the fertilizer inlet valve 1427, and then reduces the frequency of the pump 1428 after the conductivity is greater than the target value, the corresponding adjustment step can be determined based on the ratio of the conductivity of the fertilizer to the target value, wherein the adjustment step includes a reduction step and an increase step.

[0139] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is less than 0.9, the increase step of the pump 1428 is 0.3 Hz.

[0140] In some embodiments, when the ratio of the electrical conductivity of the fertilizer to the target value is greater than or equal to 0.9 and less than or equal to 0.95, the increasing step of the pump 1428 is 0.15 Hz.

[0141] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than 0.95 and less than 1, the increase step of the pump 1428 is 0.05 Hz.

[0142] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is less than 0.5, the increase step of the fertilizer inlet valve 1427 is 10%.

[0143] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than or equal to 0.5 and less than 0.8, the increasing step of the fertilizer inlet valve 1427 is 5%.

[0144] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than or equal to 0.8 and less than 1, the increasing step of the fertilizer inlet valve 1427 is 2%.

[0145] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than 1.1, the pump 1428 is reduced in steps of 0.3 Hz.

[0146] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than or equal to 1.05 and less than or equal to 1.1, the reduction step of the pump 1428 is 0.15 Hz.

[0147] In some embodiments, when the ratio of the conductivity of the fertilizer to the target value is greater than 1 and less than or equal to 1.05, the reduction step of the pump 1428 is 0.05 Hz.

[0148] In the embodiment of the present application, the mobile irrigation head can dynamically adjust the conductivity of the fertilizer during the fertilization process, and the conductivity can be maintained at a target value, thereby ensuring the fertilization effect.

[0149] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described device can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0150] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative.

[0151] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0152] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for adjusting the electrical conductivity of a fertilizer, characterized in that: The method is applied to a mobile irrigation head, and the method comprises: In response to a first instruction, the pump (1428) and the fertilizer suction port valve (1427) are turned on in a first working condition, wherein the first instruction is used to instruct the start of fertilization, the pump (1428) is used to suck fertilizer, the fertilizer suction port valve (1427) is a ball valve, the frequency of the pump (1428) corresponding to the first working condition is full frequency, and the opening of the fertilizer suction port valve (1427) is minimum opening; When it is detected that the conductivity of the fertilizer is greater than the target value, the frequency of the pump (1428) is reduced so that the difference between the conductivity and the target value is less than or equal to a first threshold value; or When it is detected that the conductivity is less than the target value, the opening of the fertilizer intake valve (1427) is first increased to make the conductivity greater than the target value, and after the conductivity is greater than the target value, the frequency of the pump (1428) is reduced to make the difference between the conductivity and the target value less than or equal to the first threshold value.

2. The method according to claim 1, characterized in that After reducing the frequency of the pump (1428), or first increasing the opening of the fertilizer suction port valve (1427) and then reducing the frequency of the pump (1428), the method further comprises: When it is detected that the conductivity is greater than the target value, the frequency of the pump (1428) is reduced, or the opening of the fertilizer intake valve (1427) is reduced, or the opening of the fertilizer intake valve (1427) is first reduced, and after the conductivity is less than the target value, the frequency of the pump (1428) is increased, so that the difference between the conductivity and the target value is less than or equal to a first threshold value; or When it is detected that the conductivity is less than the target value, the frequency of the pump (1428) is increased, or the opening of the fertilizer intake valve (1427) is increased, or the opening of the fertilizer intake valve (1427) is first increased, and after the conductivity is greater than the target value, the frequency of the pump (1428) is reduced, so that the difference between the conductivity and the target value is less than or equal to the first threshold value.

3. The method according to claim 2, characterized in that When it is detected that the conductivity is greater than the target value, the frequency of the pump (1428) is reduced, or the opening of the fertilizer suction port valve (1427) is reduced, or the opening of the fertilizer suction port valve (1427) is first reduced, and after the conductivity is less than the target value, the frequency of the pump (1428) is increased, including: When the ratio of the conductivity to the target value is greater than a second threshold, the opening of the fertilizer intake valve (1427) is reduced, or the opening of the fertilizer intake valve (1427) is first reduced, and after the conductivity is less than the target value, the frequency of the pump (1428) is increased; or When the ratio of the conductivity to the target value is less than or equal to the second threshold, the frequency of the pump (1428) is reduced.

4. The method according to claim 3, characterized in that When it is detected that the conductivity is less than the target value, the frequency of the pump (1428) is increased, or the opening of the fertilizer suction port valve (1427) is increased, or the opening of the fertilizer suction port valve (1427) is increased first, and after the conductivity is greater than the target value, the frequency of the pump (1428) is reduced, including: When the ratio of the conductivity to the target value is less than a third threshold, the opening of the fertilizer intake valve (1427) is increased, or the opening of the fertilizer intake valve (1427) is increased first, and after the conductivity is greater than the target value, the frequency of the pump (1428) is reduced; or When the ratio of the conductivity to the target value is greater than or equal to the third threshold, the frequency of the pump (1428) is increased.

5. The method according to any one of claims 2 to 4, characterized in that The adjustment steps of the fertilizer intake valve (1427) and the pump (1428) are determined according to the ratio of the conductivity to the target value.

6. The method according to any one of claims 1 to 4, characterized in that When the conductivity of the fertilizer is detected to be greater than a target value, the frequency of the pump (1428) is reduced, comprising: When it is detected that the conductivity is greater than the target value, determining a reduction step of the pump (1428); The frequency of the pump (1428) is reduced according to the reduction step.

7. The method according to claim 6, characterized in that Determining the reduction step of the pump (1428) comprises: determining a ratio of the electrical conductivity to the target value; The step size of reducing the pump (1428) is determined according to the ratio of the conductivity to the target value.

8. The method according to any one of claims 1 to 4, characterized in that When it is detected that the conductivity is less than the target value, the opening of the fertilizer intake valve (1427) is first increased to make the conductivity greater than the target value, and after the conductivity is greater than the target value, the frequency of the pump (1428) is reduced, including: When it is detected that the conductivity is less than the target value, the increasing step of the fertilizer intake valve (1427) is determined, and when the conductivity is greater than the target value, the decreasing step of the pump (1428) is determined; The opening of the fertilizer intake port valve (1427) is increased according to the increasing step of the fertilizer intake port valve (1427), and after the conductivity is greater than the target value, the step of the pump (1428) is reduced according to the decreasing step of the pump (1428).

9. The method according to claim 8, characterized in that The step of determining the increase step of the fertilizer intake valve (1427), and after the conductivity is greater than the target value, determining the decrease step of the pump (1428), comprises: The increasing step of the fertilizer intake valve (1427) and the decreasing step of the pump (1428) are determined according to the ratio of the conductivity to the target value.

10. A mobile irrigation head, characterized in that: The mobile irrigation head comprises a mobile bin (110), an irrigation pipe system (120), a fertilizer system (130), and a fertilizer irrigation control system (140). The irrigation pipe system (120), the fertilizer system (130), and the fertilizer irrigation control system (140) are accommodated in the mobile bin (110). The fertilizer irrigation control system (140) comprises a control module (141) and a pipe assembly (142). The pipe assembly (142) is connected to the irrigation pipe system (120) and the fertilizer system (130) to mix water and fertilizer. The pipe assembly (142) comprises a fertilizer suction port valve (1427) and a pump (1428). The fertilizer suction port valve (1427) and the pump (1428) are used to control the flow of fertilizer. The pipe assembly (142) is provided with a conductivity detector (1433). The control module (141) is used to execute the method according to any one of claims 1 to 9.

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