Intelligent atomizing water and fertilizer integrated ginger cultivation system and control method

Abstract

The invention discloses an intelligent atomizing water and fertilizer integrated ginger cultivation system and a control method, and mainly relates to the technical field of intelligent crop cultivation. The sensor module is used for collecting and monitoring ginger planting environment parameters, and the ginger planting environment parameters comprise soil humidity, air temperature, illumination intensity and carbon dioxide concentration; the atomizing module is used for generating mist in the upper space of the ginger through a high-pressure nozzle; the water and fertilizer integration module is used for mixing water and fertilizer and supplying the ginger through the atomizing module; the control module is used for adjusting water and fertilizer supply based on the data information acquired by the sensor module, and regulating and controlling a mist spraying equipment switch; and the Internet of Things module is used for remote monitoring and data transmission. The intelligent ginger planting system has the advantages that intelligent control of integrating the atomizing technology with water and fertilizer and combining illumination and environment temperature regulation in the ginger planting process is achieved, the precise management level is improved, the ginger growth environment is improved, and the ginger yield and the product quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent cultivation of crops, and specifically to a ginger intelligent mist irrigation and integrated water and fertilizer cultivation system and a control method therefor. Background Art

[0002] Ginger originated in tropical rainforest regions and has a growth habit of preferring humidity and being intolerant to strong light. Ginger cultivation in summer is prone to strong light or high-temperature stress. Therefore, shading cultivation is mostly used in production. However, mist irrigation can reduce the temperature of the plant canopy and leaves and increase air humidity. Therefore, the mist irrigation technology can be used to replace the shading measure. At the same time, combined with the integrated water and fertilizer and intelligent automatic technology, the precision management level can be improved, the growth environment of ginger can be improved, and the yield and product quality of ginger can be increased.

[0003] In the current process of cultivating and planting ginger, such as the invention patent CN109618879A: a ginger planting device and method based on mist irrigation cultivation, and CN209693651U, a ginger planting device based on mist irrigation cultivation, which includes support rods distributed in the ginger field, mist nozzles arranged on the support rods and used for generating water-like diffused mist, a high-pressure pump arranged to communicate with the mist nozzles, and a water tank arranged to communicate with the high-pressure pump. Through the mist nozzles, high-pressure pump and water tank, a water-like diffused mist is formed in the ginger field, and through the support rods, the mist nozzles are distributed in the ginger field, improving the photosynthetic pigment content of ginger leaves. It is no longer an open planting in the ginger field, so the yield of ginger is increased. However, only a mist nozzle device is simply added in the field, without combining the integrated water and fertilizer and intelligent control technology, which will cause waste of water resources. And during the process of generating mist, if the accurate control of the spraying duration, position, etc. cannot be achieved, it will also affect the growth trend of ginger to a certain extent.

[0004] Therefore, there is an urgent need for a ginger intelligent mist irrigation and integrated water and fertilizer cultivation system and a control method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a ginger intelligent mist irrigation and integrated water and fertilizer cultivation system and a control method therefor, which can realize the intelligent control of the combination of mist irrigation technology and integrated water and fertilizer in the process of ginger planting, improve the precision management level, improve the growth environment of ginger, and increase the yield and product quality of ginger.

[0006] To achieve the above object, the present invention is realized through the following technical solutions:

[0007] On the one hand, a ginger intelligent mist irrigation and integrated water and fertilizer cultivation system is provided, including:

[0008] A sensor module: used to collect and monitor the ginger planting environment parameters, and the ginger planting environment parameters include: soil humidity, environmental temperature, light intensity, and carbon dioxide concentration;

[0009] Atomizing module: used to generate atomized mist in the upper space of ginger through high-pressure nozzles;

[0010] Integrated water and fertilizer module: used to mix water and fertilizer and supply them to ginger through the atomizing module;

[0011] Control module: used to adjust the water and fertilizer supply based on the data information collected by the sensor module;

[0012] Internet of Things module: used for remote monitoring and data transmission.

[0013] Preferably, the sensor module includes: a humidity sensor, a temperature sensor, a light intensity sensor, a carbon dioxide concentration sensor, and a first data processing unit. The first data processing unit is used to collect humidity data information, temperature data information, light intensity data information, and carbon dioxide concentration data information, and package the collected data into a data set and send it to the control module.

[0014] Preferably, the atomizing module includes:

[0015] High-pressure water pump: used to provide high-pressure water flow to ensure the atomization effect of water;

[0016] Nozzle: used to atomize the high-pressure water flow into water droplets to form water mist;

[0017] Pressure regulating valve: used to adjust the pressure of the atomizing module;

[0018] First control interface: used to connect to the control module and receive command information;

[0019] Fixing device: used to fix the nozzle and pipeline to ensure that the water mist can be sprayed into the upper space of ginger.

[0020] Preferably, the integrated water and fertilizer module includes:

[0021] Water source connection device: used to connect to an external water source to provide a basic water source for the system;

[0022] Fertilizer storage tank: used to store liquid or dissolved solid fertilizers;

[0023] Water and fertilizer mixer: used to mix water and fertilizer in a set ratio to form a water and fertilizer mixture;

[0024] Proportion control valve: used to control the mixing ratio of water and fertilizer;

[0025] Filter: used to filter impurities in the water and fertilizer mixture;

[0026] Delivery pipeline: used to transport the water and fertilizer mixture to the atomizing module;

[0027] Pressure pump: used to provide the conveying pressure for the water-fertilizer mixture;

[0028] Second control interface: used to connect to the control module and receive instruction information;

[0029] Backflow prevention device: used to prevent the backflow of the water-fertilizer mixture.

[0030] Preferably, the control module is specifically a microcontroller, which is used to execute the control method of the cultivation system.

[0031] Preferably, the Internet of Things module includes:

[0032] Sensor unit: used to convert the data information collected by the sensor into an electrical signal and transmit it to the control module;

[0033] Communication unit: used to realize the data transmission between the device and the cloud platform or other devices;

[0034] Cloud platform: used to store, process and analyze data, and provide remote monitoring and management functions;

[0035] User terminal: used to provide an interface for users to remotely monitor and control;

[0036] Power management unit: used to provide a stable power supply for the Internet of Things module;

[0037] Storage unit: used to store sensor data, control logs and system configuration information;

[0038] Alarm and notification unit: used to send an alarm notification when the system is abnormal or the environmental parameters exceed the set range.

[0039] On the other hand, a control method based on the ginger intelligent misting water and fertilizer integrated cultivation system as described above is provided, including the following steps:

[0040] S1: The sensor collects environmental data in real time and transmits it to the control module;

[0041] S2: The control module analyzes the data to judge whether it is necessary to adjust the water and fertilizer supply;

[0042] S3: According to the analysis result, automatically adjust the misting device and the water-fertilizer mixing ratio.

[0043] Preferably, the step S2 includes:

[0044] S21: Data preprocessing, specifically: using moving average filtering to preprocess the original data collected by the sensor to remove noise and outliers:

[0045]

[0046] where yt is the filtered data, x t-i is the sampling value at the (t - i)-th moment in the original data sequence, N is the window size (the number of sampling points participating in the averaging), and t is the current moment;

[0047] Calibrate the data according to the characteristics of the sensor;

[0048] S22: Analyze the data after preprocessing;

[0049] S23: Based on the analysis result in step S23, generate a control instruction using the PID control algorithm:

[0050]

[0051] where u(t) is the control output, e(t) is the error, and K p is the proportional gain, used to adjust the system response speed; K i is the integral gain, used to eliminate the steady-state error; K d is the derivative gain, used to suppress overshoot and oscillation;

[0052] S24: Generate specific control instructions according to the output of the decision algorithm, including: adjusting the pressure pump or adjusting the high-pressure water pump.

[0053] Preferably, the step S3 includes:

[0054] S31: Obtain the irrigation demand, fertilization demand, and environmental factor correction;

[0055] S32: Calculate the water-fertilizer mixing ratio according to the irrigation demand and fertilization demand;

[0056] S33: Adjust the working parameters of the misting device according to the calculated irrigation demand and mixing ratio.

[0057] Preferably, the step S33 includes:

[0058] Misting amount adjustment, specifically adjusting the flow rate of the high-pressure water pump:

[0059] Q pump = k p ·Q adj

[0060] where k p is the water pump flow rate adjustment coefficient, and Q adj is the correction of the irrigation amount by temperature;

[0061] Atomization effect adjustment, specifically adjusting the pressure of the pressure regulating valve:

[0062] P = k pressute ·(1 + kH ·(H - H opt ))

[0063] Wherein, P is the atomization pressure, H is the ambient humidity, and H opt is the optimal humidity, and k H is the humidity correction coefficient.

[0064] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0065] 1. The system is applicable to the intelligent cultivation of ginger, especially suitable for large-scale planting and facility agriculture, which helps to promote agricultural modernization.

[0066] 2. The intelligent atomization technology replaces the traditional shading measures, further improving the growth environment of ginger and facilitating the growth of ginger.

[0067] 3. The atomization technology is combined with the integration of water and fertilizer and intelligent automation technology, improving the utilization rate of water and fertilizer and production efficiency, promoting the growth of ginger, and increasing the yield and quality.

[0068] 4. The system has good operability and popularization. Description of the Drawings

[0069] Figure 1 is a schematic structural diagram of the system of the present invention;

[0070] Figure 2 is a flowchart of the control method of the present invention;

[0071] Figure 3 is a flowchart of the execution method of the control module of the present invention;

[0072] Figure 4 is a flowchart of the execution method of the automatic adjustment atomization device and the water and fertilizer mixing ratio of the present invention. Detailed Embodiments

[0073] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by this application.

[0074] In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relational terms determined to facilitate the description of the structural relationship of each component or element of the present invention, and do not specifically refer to any component or element of the present invention, and should not be construed as a limitation to the present invention.

[0075] In the present invention, terms such as "fixed connection", "connected", "connected to" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present invention can be determined according to specific circumstances, and it should not be construed as a limitation to the present invention.

[0076] Embodiment 1:

[0077] As Figure 1 shown, this embodiment provides an intelligent mist and water-fertilizer integrated cultivation system for ginger, including:

[0078] Sensor module: used to collect and monitor the environmental parameters of ginger cultivation, where the environmental parameters of ginger cultivation include: soil and environmental humidity, air temperature, light intensity, and carbon dioxide concentration;

[0079] Mist module: used to generate fine water mist through high-pressure nozzles to ensure the generation of mist in a suitable space above the ginger;

[0080] Water and fertilizer integration module: used to mix water and fertilizer and accurately supply the ginger through the mist module;

[0081] Control module: used to adjust the water and fertilizer supply and environmental parameters based on the data information collected by the sensor module;

[0082] Internet of Things module: used for remote monitoring and data transmission, and supports remote management on mobile phones or computer terminals.

[0083] The sensor module includes: a humidity sensor, a temperature sensor, a light intensity sensor, a carbon dioxide concentration sensor, and a first data processing unit. The first data processing unit is used to collect humidity data information, temperature data information, light intensity data information, and carbon dioxide concentration data information, and package the collected data into a data set and send it to the control module.

[0084] The mist module includes:

[0085] High-pressure water pump: used to provide high-pressure water flow to ensure the water atomization effect; in this embodiment, corrosion-resistant materials are used to adapt to the transportation of the water and fertilizer mixture;

[0086] Nozzle: used to atomize the high-pressure water flow into tiny water droplets to form a uniform water mist; in this embodiment, small-aperture nozzles are used to ensure the atomization effect. In addition, corrosion-resistant and wear-resistant materials are used, which are suitable for long-term use;

[0087] Pressure regulating valve: used to adjust the pressure of the mist module;

[0088] The first control interface: used to connect to the control module and receive instruction information;

[0089] Fixing device: used to fix the nozzle and pipeline to ensure that the water mist can be sprayed onto the ginger roots.

[0090] The integrated water and fertilizer module includes:

[0091] Water source connection device: used to connect to an external water source to provide the basic water source for the system;

[0092] Fertilizer storage tank: used to store liquid or dissolved solid fertilizers;

[0093] Water and fertilizer mixer: used to mix water and fertilizer in a set ratio to form a water and fertilizer mixture;

[0094] Proportion control valve: used to control the mixing ratio of water and fertilizer;

[0095] Filter: used to filter impurities in the water and fertilizer mixture;

[0096] Delivery pipeline: used to deliver the water and fertilizer mixture to the mist module;

[0097] Pressure pump: used to provide the delivery pressure for the water and fertilizer mixture;

[0098] The second control interface: used to connect to the control module and receive instruction information;

[0099] Backflow prevention device: used to prevent the backflow of the water and fertilizer mixture.

[0100] The control module is specifically a microcontroller, used to execute the control method of the cultivation system.

[0101] The Internet of Things module includes:

[0102] Sensor unit: used to convert the data information collected by the sensor into an electrical signal and transmit it to the control module;

[0103] Communication unit: used to realize data transmission between the device and the cloud platform or other devices;

[0104] Cloud platform: used to store, process and analyze data, and provide remote monitoring and management functions;

[0105] User terminal: used to provide an interface for users to remotely monitor and control;

[0106] Power management unit: used to provide a stable power supply for the Internet of Things module;

[0107] Storage unit: used to store sensor data, control logs and system configuration information;

[0108] Alarm and notification unit: used to send alarm notifications when the system is abnormal or the environmental parameters exceed the set range.

[0109] As Figure 2 shown, this embodiment also provides a control method for the ginger intelligent mist irrigation and fertilization integrated cultivation system based on the above, including the following steps:

[0110] S1: The sensor collects environmental data in real time and transmits it to the control module;

[0111] S2: The control module analyzes the data to determine whether it is necessary to adjust the water and fertilizer supply;

[0112] S3: According to the analysis result, automatically adjust the mist irrigation device and the water and fertilizer mixing ratio.

[0113] As Figure 3 shown, the step S2 includes:

[0114] S21: Data preprocessing, specifically: using moving average filtering to preprocess the original data collected by the sensor to remove noise and outliers:

[0115]

[0116] where y t is the filtered data, x t is the original data, and N is the window size;

[0117] According to the characteristics of the sensor, calibrate the data. For example, the calibration formula for the soil moisture sensor:

[0118] θ = a·V + b

[0119] where θ is the actual soil moisture, V is the sensor reading, and a and b are calibration coefficients;

[0120] According to the above calibration formula for the soil moisture sensor, the calibration formulas for all sensors can be obtained, so as to perform full data calibration;

[0121] S22: Analyze the data after preprocessing, including: soil moisture analysis, nutrient demand analysis, and environmental factor analysis. Among them, the soil moisture analysis is specifically:

[0122] If the soil moisture θ < θ min , then the irrigation amount needs to be increased,

[0123] If the soil moisture θ > θ max , then the irrigation amount needs to be reduced,

[0124] where θ min and θ max are the lower and upper limits of the suitable humidity for ginger;

[0125] The nutrient requirement analysis is specifically as follows:

[0126] (1) According to the crop growth model, calculate the nutrient requirement N at the current stage req ,

[0127] (2) Compare the difference between the current soil nutrient concentration N soil and the requirement:

[0128] If N soil < N req , then the fertilizer supply needs to be increased,

[0129] If N soil > N req , then the fertilizer supply needs to be reduced;

[0130] The environmental factor analysis is specifically as follows:

[0131] Considering the influence of environmental factors such as temperature and light on the water and fertilizer requirements, in this embodiment, the correction of the irrigation amount by temperature is taken as an example:

[0132] Q adj = Q base ·(1 + k T ·(T - T opt ))

[0133] where Q adj is the corrected irrigation amount, Q base is the basic irrigation amount, k T is the temperature correction coefficient, T is the current temperature, and T opt is the optimum temperature of the crop;

[0134] S23: Based on the analysis results in step S23, use the PID control algorithm to generate a control instruction:

[0135]

[0136] where u(t) is the control output, e(t) is the error, and K p , K i , K d are the PID parameters;

[0137] S24: Generate specific control instructions according to the output of the decision algorithm, including: adjusting the pressure pump or adjusting the high-pressure water pump.

[0138] As Figure 4 shown, the said step S3 includes:

[0139] S31: Obtain the irrigation requirement, fertilization requirement, and environmental factor correction. Among them, the calculation formula for the irrigation requirement is:

[0140] Q req = k θ ·(θ opt - θ)

[0141] Wherein, Q req is the required irrigation volume, θ opt is the optimum soil humidity for ginger, k θ is the irrigation adjustment coefficient;

[0142] The calculation formula for the fertilizer requirement is:

[0143] F req = k N ·(N req - N soil )

[0144] Wherein, F req is the fertilizer requirement, N req is the nutrient requirement at the current growth stage of ginger, k N is the fertilizer application adjustment coefficient;

[0145] The environmental factor correction is to consider the influence of environmental factors such as light and temperature on the water and fertilizer requirements, and its correction formula is:

[0146] Correction of temperature on irrigation volume:

[0147] Q adj = Q req ·(1 + k T ·(T - T opt ))

[0148] Correction of light on fertilizer application rate:

[0149] F adj = F req ·(1 + k L ·(L - L opt ))

[0150] Wherein, k T , k L are the environmental correction coefficients;

[0151] S32: Calculate the water and fertilizer mixing ratio according to the irrigation requirement and the fertilizer requirement:

[0152]

[0153] S33: According to the calculated irrigation requirement and the mixing ratio, adjust the working parameters of the mist spraying device, including:

[0154] Adjustment of the mist spraying volume, specifically, adjust the flow rate of the high-pressure water pump:

[0155] Q pump = k p ·Q adj

[0156] where k p is the water pump flow regulation coefficient, and Q adj is the correction of temperature to irrigation volume;

[0157] Atomization effect regulation, specifically by adjusting the pressure of the pressure regulating valve:

[0158] P = k pressure ·(1 + k H ·(H - H opt ))

[0159] where P is the atomization pressure, H is the ambient humidity, and H opt is the optimum humidity, and k H is the humidity correction coefficient.

[0160] Using the PID control algorithm to achieve dynamic regulation of water and fertilizer supply, the calculation process is the same as that in step S23 above. Then, using the fuzzy control algorithm to handle the problems of uncertainty and nonlinearity, and finally generating specific control instructions according to the algorithm output:

[0161] Adjust the water pump flow: control the irrigation volume;

[0162] Adjust the fertilizer pump flow: control the fertilization amount;

[0163] Adjust the pressure regulating valve: control the atomization effect;

[0164] Adjust the mixing ratio valve: control the water and fertilizer mixing ratio.

[0165] Embodiment 2:

[0166] In order to enable the present invention to achieve the shading effect during the ginger cultivation process, based on the ginger intelligent misting and water-fertilizer integrated cultivation system in Embodiment 1, this embodiment provides a shading control method for the ginger cultivation process, specifically:

[0167] Based on the sensors in Embodiment 1, the soil humidity S and light intensity L in the environment are collected in real time, and according to the ginger planting experience, the ginger growth requirement thresholds are set:

[0168] Light threshold: L_threshold (such as 30,000 lux);

[0169] Suitable soil humidity threshold: S_threshold (such as 70%);

[0170] And the ginger growth requirement thresholds are stored in the control module in advance, and the deviation of the soil humidity is classified:

[0171] Far less than the threshold: S ≤ S_threshold - ΔS 1 (ΔS 1 = 20%);

[0172] Slightly less than the threshold: S_threshold - ΔS 2 < S < S_threshold (ΔS 2 = 10%);

[0173] Execute the following strategy according to the combined conditions of light and soil humidity:

[0174] When L > L_threshold and S ≤ S_threshold - ΔS, pause the fertilizer spraying and only turn on the water mist spraying. The water volume formula:

[0175]

[0176] When L > L_threshold and S_threshold - ΔS 2 < S < S_threshold, pause the fertilizer spraying, reduce the water volume and increase the water pressure: The water volume formula:

[0177]

[0178] The water pressure formula:

[0179]

[0180] Wherein, Q max is the maximum water output (10 L / min); Q base is the reference water output (5 L / min); P base is the reference water pressure (0.3 MPa).

[0181] The above is a specific description of the preferred embodiment of the present invention, but the present invention is not limited to the described embodiment. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A ginger intelligent mist water and fertilizer integrated cultivation system, characterized in that: include: Sensor module: used to collect and detect ginger planting environment parameters, including soil moisture, ambient temperature, light intensity and carbon dioxide concentration; Mist module: used to generate water mist through high-pressure nozzles to generate mist in the upper space of ginger; Water-fertilizer integrated module: used to mix water and fertilizer and supply them to ginger through the mist module; Control module: used to adjust water and fertilizer supply and control the opening and closing of misting equipment based on the data information collected by the sensor module; Internet of Things module: used for remote monitoring and data transmission.

2. According to claim 1, a ginger intelligent mist water-fertilizer integrated cultivation system is characterized in that: The sensor module includes: a humidity sensor, a temperature sensor, a light intensity sensor, a carbon dioxide concentration sensor and a first data processing unit. The first data processing unit is used to collect humidity data information, temperature data information, light intensity data information and carbon dioxide concentration data information, and package the collected data into a data set and send it to the control module.

3. According to claim 1, a ginger intelligent mist water-fertilizer integrated cultivation system is characterized in that: The mist module comprises: High-pressure water pump: used to provide high-pressure water flow to ensure the effect of water atomization; Nozzle: used to atomize high-pressure water flow into water droplets to form water mist; Pressure regulating valve: used to adjust the pressure of the mist module; First control interface: used to connect to the control module and receive command information; Fixing device: used to fix the nozzle and pipe to ensure that the water mist can be sprayed to the upper space of the ginger.

4. The intelligent mist water-fertilizer integrated cultivation system for ginger according to claim 1, characterized in that: The water-fertilizer integration module comprises: Water source connection device: used to connect to an external water source to provide basic water source for the system; Fertilizer storage tank: used to store liquid or dissolved solid fertilizer; Water-fertilizer mixer: used to mix water and fertilizer in a set ratio to form a water-fertilizer mixture; Proportional control valve: used to control the mixing ratio of water and fertilizer; Filter: used to filter impurities in the water-fertilizer mixture; Delivery pipeline: used to deliver the water-fertilizer mixture to the mist module; Pressure pump: used to provide delivery pressure for water-fertilizer mixture; Second control interface: used to connect to the control module and receive command information; Anti-backflow device: used to prevent the water-fertilizer mixture from flowing back.

5. The intelligent mist water-fertilizer integrated cultivation system for ginger according to claim 1, characterized in that: The control module is specifically a microcontroller, which is used to execute the control method of the cultivation system.

6. The intelligent mist water-fertilizer integrated cultivation system for ginger according to claim 1, characterized in that: The Internet of Things module includes: Sensor unit: used to convert the data information collected by the sensor into electrical signals and transmit them to the control module; Communication unit: used to realize data transmission between the device and the cloud platform or other devices; Cloud platform: used to store, process and analyze data, and provide remote monitoring and management functions; User terminal: used to provide users with an interface for remote monitoring and control; Power management unit: used to provide stable power for the IoT module; Storage unit: used to store sensor data, control logs and system configuration information; Alarm and notification unit: used to issue alarm notifications when the system is abnormal or environmental parameters exceed the set range.

7. A control method based on the ginger intelligent mist water-fertilizer integrated cultivation system according to claim 1, characterized in that: The following steps are involved: S1: The sensor collects environmental data in real time and transmits it to the control module; S2: The control module analyzes the data and determines whether the water and fertilizer supply needs to be adjusted; S3: Automatically adjust the mist device and the water-fertilizer mixing ratio based on the analysis results.

8. A control method according to claim 7, characterized in that: The step S2 comprises: S21: Data preprocessing, specifically: using moving average filtering to remove noise and outliers from the raw data collected by the sensor: Among them, y t is the filtered data, x t is the original data, N is the window size; Calibrate the data according to the characteristics of the sensor; S22: Analyze the preprocessed data; S23: Based on the analysis result in step S23, a PID control algorithm is used to generate a control instruction: Where u(t) is the control output, e(t) is the error, and K p , K i , K d are PID parameters; S24: Generate specific control instructions based on the output of the decision algorithm, including: adjusting the pressure pump or adjusting the high-pressure water pump.

9. A control method according to claim 7, characterized in that: The step S3 comprises: S31: Obtain irrigation demand, fertilizer demand and environmental factor correction; S32: Calculate the water-fertilizer mixing ratio according to the irrigation demand and the fertilization demand; S33: Adjust the working parameters of the mist device according to the calculated irrigation demand and mixing ratio.

10. A control method according to claim 9, characterized in that: The step S33 comprises: Mist volume adjustment, specifically adjusting the flow of the high-pressure water pump: Q pump =k p ·Q adj Among them, k p is the pump flow regulation coefficient, Q adj is the temperature correction for irrigation amount; Atomization effect adjustment, specifically adjusting the pressure of the pressure regulating valve: P=k pressute ·(1+k H ·(H-H opt )) Where P is the atomization pressure, H is the ambient humidity, and H opt is the optimum humidity, k H is the humidity correction factor.

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