Intelligent water and fertilizer integrated control machine and control method thereof

Abstract

The application discloses an intelligent water and fertilizer integrated control machine, characterized in that the machine comprises a water and fertilizer control host and a field monitoring terminal; the water and fertilizer control host comprises a rack, a control box fixed to the rack, a mixing box, a stirring motor arranged on the mixing box, and a water inlet pipe, a water and fertilizer conveying pipe and a plurality of groups of raw material conveying pipes; a water source electromagnetic valve is arranged on the water inlet pipe; a raw material flow control valve is arranged on the raw material conveying pipe; a water and fertilizer flow control valve is arranged on the water and fertilizer conveying pipe; the water and fertilizer control host further comprises a main controller; the field monitoring terminal comprises a supporting rod, a protection box, an air speed sensor and a camera; air temperature and humidity sensors are arranged in the protection box; and a soil temperature sensor is arranged outside the protection box and is used for being embedded in soil. The water and fertilizer integrated controller can finely and dynamically adjust water and fertilizer flow according to current soil conditions and air conditions of farmland, so that crops can fully absorb water and fertilizer, and waste of water and fertilizer can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of agricultural irrigation technology, and more specifically, to an intelligent integrated water and fertilizer control machine and its control method. Background Technology

[0002] Fertilizers are substances that provide one or more essential nutrients for plants, improve soil properties, and enhance soil fertility. They are one of the material foundations of agricultural production.

[0003] With the development of agricultural technology, integrated water and fertilizer control machines for automatic fertilization of farmland are gradually being promoted and used. The integrated water and fertilizer control machine generally mixes pre-prepared fertilizer concentrate with water to form water and fertilizer, and then sends the water and fertilizer into the field pipeline network, which can both fertilize and irrigate the farmland, achieving two goals at once.

[0004] However, existing integrated water and fertilizer control machines generally have a fixed flow rate for water and fertilizer, meaning that the machine delivers water and fertilizer to the field pipeline network at a certain flow rate during operation. Because the rate at which plants absorb water and fertilizer and the rate at which water and fertilizer naturally run off the soil vary significantly under different environmental temperature and humidity conditions, if the flow rate of water and fertilizer application is less than the rate of water and fertilizer runoff, crops cannot effectively absorb water and fertilizer, resulting in poor application effects. Conversely, if the flow rate of water and fertilizer application exceeds the sum of the crop's absorption rate and the rate of water and fertilizer runoff, it will lead to a significant waste of water and fertilizer.

[0005] To ensure that crops fully absorb water and fertilizer, existing integrated water and fertilizer control machines typically use a large flow rate to output water and fertilizer, which cannot be finely adjusted, often resulting in a large waste of water and fertilizer, and needs to be improved. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an intelligent integrated water and fertilizer control machine and its control method, which can more precisely adjust the flow rate of output water and fertilizer, and reduce the waste of water and fertilizer.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An intelligent integrated water and fertilizer control machine includes a water and fertilizer control host and a field monitoring terminal. The water and fertilizer control host includes a frame, a control box fixed on the frame, a mixing tank, a stirring motor mounted on the mixing tank, a water inlet pipe, a water and fertilizer delivery pipe, and several sets of raw material delivery pipes. One end of the water inlet pipe is connected to the interior of the mixing tank, and the other end is connected to a water pump. The water inlet pipe is equipped with a solenoid valve for water supply. One end of the raw material delivery pipe is connected to the water inlet pipe, and the other end is connected to a raw material tank. The raw material delivery pipe is equipped with a raw material flow control valve. One end of the water and fertilizer delivery pipe is connected to the interior of the mixing tank, and the other end is connected to a field pipeline network. The water and fertilizer delivery pipe is equipped with a water and fertilizer flow control valve. The water and fertilizer control host also includes a main controller for controlling the water source. The system includes a solenoid valve, a raw material flow control valve, a water and fertilizer flow control valve, a stirring motor, and a water pump motor. The field monitoring terminal includes a support rod, the lower end of which is inserted into the farmland. A protective box is fixed to the support rod, and a wind speed sensor is mounted on the top of the protective box. A crossbar is fixed to the upper end of the support rod, and a camera is mounted on the crossbar. The camera lens faces downwards to photograph the crops in the farmland. An air temperature sensor and an air humidity sensor are installed inside the protective box. A soil temperature sensor is installed on the outside of the protective box for burying in the soil. A data acquisition and processing board is installed inside the protective box. The soil temperature sensor, soil humidity sensor, air temperature sensor, air humidity sensor, wind speed sensor, soil nitrogen, phosphorus, and potassium sensor, and the camera are all connected to the data acquisition and processing board, which is communicatively connected to the main controller.

[0009] As a preferred embodiment: the acquisition and control board determines whether water and fertilizer application is needed based on the nitrogen, phosphorus, and potassium content of the soil. When the content of any one of the nitrogen, phosphorus, and potassium elements in the soil is lower than a preset value, water and fertilizer application is considered necessary. The acquisition and processing board obtains the water and fertilizer absorption rate of the crop at the current soil temperature. Simultaneously, the acquisition and processing board obtains the water and fertilizer loss rate data under the environmental conditions based on the soil humidity, air temperature, and air humidity, and calculates the required water and fertilizer flow rate based on the water and fertilizer absorption rate and the water and fertilizer loss rate. The acquisition and processing module sends the water and fertilizer flow rate data to the main controller. The main controller controls the opening of the water and fertilizer flow control valve to ensure that the allowed flow rate is equal to the required water and fertilizer flow rate. At the same time, the main controller controls the water source solenoid valve to open, controls the water pump to start, controls the raw material flow control valve to open, and controls the stirring motor to start, thus initiating water and fertilizer application.

[0010] As a preferred solution: During the application of water and fertilizer, the soil moisture value is continuously sampled. Each time a sample is taken, the processing plate calculates the required water and fertilizer flow rate under the current environmental conditions and sends the real-time required water and fertilizer flow rate value to the main controller. The main controller adjusts the flow rate of the water and fertilizer flow valve according to the real-time required water and fertilizer flow rate value to make the two equal.

[0011] As a preferred embodiment: the data acquisition and processing board sends the calculated required water and fertilizer flow rate and the detected wind speed data to the main controller each time. Before controlling the integrated water and fertilizer machine to perform the water and fertilizer application action, the main controller compares the detected wind speed value with a preset value. When the wind speed value is greater than the preset value, the main control module sets a delay time, which is less than the time interval between the first and second data acquisitions by the data acquisition and processing board. After the delay time, the integrated water and fertilizer machine is controlled to start water and fertilizer application, and the application stops when the main controller receives the next required water and fertilizer flow rate and wind speed data sent by the data acquisition and processing board.

[0012] As a preferred solution: after the delay time, when the main controller controls the integrated water and fertilizer machine to start applying water and fertilizer, it first applies water and fertilizer for T1 seconds, then pauses applying water and fertilizer for T2 seconds, and then applies water and fertilizer again for T1 seconds, and so on until the main control module receives the next required water and fertilizer flow rate value and wind speed data sent by the acquisition and processing board.

[0013] As a preferred embodiment: the data acquisition and processing board continuously samples the air humidity value. When water and fertilizer need to be applied, the data acquisition and processing board compares the previously collected multiple sets of air humidity values. When the three most recently measured air humidity values ​​continue to increase, the data acquisition and processing board sends the calculated required water and fertilizer flow rate value to the main controller. At the same time, it sends a waiting execution name to the main controller. At this time, the main controller is in standby mode and sends a prompt SMS to the administrator's mobile phone through the GSM module, reminding the administrator to confirm whether to start the water and fertilizer application action by operating the touch screen.

[0014] As a preferred embodiment: the acquisition and processing board analyzes and processes the captured images, identifies the crop type through feature points in the images, and then matches the proportion of various raw materials for the crop according to the nutrient requirements of different types of plants. The acquisition and processing board sends the raw material proportion data to the main controller, and the main controller adjusts the proportion of various raw materials by controlling the raw material flow control valves on each group of raw material conveying pipes according to the raw material proportion.

[0015] As a preferred embodiment: the acquisition and processing board scans all pixels in the captured image, obtains the color value of each pixel, counts the number of pixels with a green color value, classifies the crop growth status by the ratio of green pixels to the total number of pixels in the image, and then matches the ratio of raw materials to water for each growth status. The acquisition and processing board sends the raw material to water ratio data to the main controller, and the main controller adjusts the flow rate of the raw material liquid according to the raw material to water ratio.

[0016] Compared with the prior art, the advantages of the present invention are: the integrated water and fertilizer controller can make precise dynamic adjustments to the water and fertilizer flow rate according to the current soil and air conditions in the farmland, which can not only ensure that the crops fully absorb water and fertilizer, but also effectively reduce the waste of water and fertilizer. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the water and fertilizer control host in this embodiment;

[0018] Figure 2 This is a schematic diagram of the structure of the field monitoring terminal in this embodiment;

[0019] Figure 3 This is the circuit schematic diagram in this embodiment.

[0020] Explanation of reference numerals in the attached drawings: 1. Water and fertilizer main unit; 101. Frame; 102. Control box; 103. Mixing box; 104. Stirring motor; 105. Water inlet pipe; 106. Water source solenoid valve; 107. Pressure relief valve; 108. Water inlet manual valve; 109. Raw material conveying pipe; 110. Raw material manual valve; 111. Raw material flow control valve; 112. Water and fertilizer conveying pipe; 113. Water and fertilizer flow control valve; 2. On-site monitoring terminal; 201. Support rod; 202. Protective box; 203. Crossbar; 204. Camera; 205. Solar panel. Detailed Implementation

[0021] An intelligent integrated water and fertilizer control machine includes a water and fertilizer control host and a field monitoring terminal 2.

[0022] Reference Figure 1The water and fertilizer control unit includes a frame 101, a control box 102 fixed on the frame 101, a mixing box 103, a stirring motor 104 installed on the mixing box 103, a water inlet pipe 105, a water and fertilizer delivery pipe 112, and several sets of raw material delivery pipes 109. Each set of raw material delivery pipes 109 can be connected to a raw material tank storing different raw materials or the same raw materials. One end of the water inlet pipe 105 is connected to the interior of the mixing tank 103, and the other end of the water inlet pipe 105 is used to connect to the water pump. The water inlet pipe 105 is equipped with a water source solenoid valve, a water inlet manual valve 108, and a pressure relief valve 107. One end of the raw material conveying pipe 109 is connected to the water inlet pipe 105 (or directly connected to the mixing tank 103), and the other end of the raw material conveying pipe 109 is used to connect to the fertilizer raw material (hereinafter referred to as raw material) tank. The raw material liquid in the raw material tank flows into the raw material conveying pipe 109 through the pump pressure device or by its own gravity. The raw material conveying pipe 109 is equipped with a raw material flow control valve 111 and a raw material manual valve 110. One end of the water and fertilizer conveying pipe 112 is connected to the interior of the mixing tank 103, and the water and fertilizer conveying pipe 112 is equipped with a water and fertilizer flow control valve 113.

[0023] Reference Figure 3 The water and fertilizer control host also includes a main controller, which includes a main control module, and further includes a first electromagnetic drive module, a second electromagnetic drive module, a third electromagnetic drive module, a first motor drive module, a second motor drive module, a first storage module, a touch screen, a first communication module, a GSM module, and a first power supply module, all connected to the main control module. The first electromagnetic drive module is connected to the water source solenoid valve 106 and is used to control the water source solenoid valve 106; the second electromagnetic drive module is connected to the raw material flow control valve 111 and is used to control the raw material flow control valve 111; the third electromagnetic drive module is connected to the water and fertilizer flow control valve 113 and is used to control the water and fertilizer flow control valve 113; the first motor drive module is connected to the stirring motor 104 and is used to control the stirring motor 104; the second motor drive module is connected to the water pump motor and is used to control the water pump motor.

[0024] The main control module sends control signals to each drive module, causing each drive module to drive its corresponding actuator (the actuator includes the valve body and the motor) to produce the corresponding action.

[0025] Reference Figure 2 The on-site monitoring terminal 2 includes a support rod 201, the lower end of which is inserted into the farmland. A protective box 202 is fixed on the support rod 201. A wind speed sensor is installed on the top of the protective box 202. A crossbar 203 is fixed on the upper end of the support rod 201. A camera 204 is installed on the crossbar 203. The lens of the camera 204 faces downwards to photograph the crops in the farmland. An air temperature sensor and an air humidity sensor are installed inside the protective box 202. A soil temperature sensor for burying in the soil is installed on the outside of the protective box 202.

[0026] The protective box 202 contains a data acquisition and processing board, which includes a microprocessor module, a signal sampling module, an image acquisition module, a second storage module, a second communication module, and a second power supply module connected to the microprocessor module.

[0027] Soil temperature sensor, soil moisture sensor, air temperature sensor, air humidity sensor, wind speed sensor, and soil nitrogen, phosphorus, and potassium sensor are connected to their respective sampling ports of the signal sampling module. The signal sampling module collects the output signals from each sensor and transmits the collected signals to the microprocessor module. The output of camera 204 is connected to the image acquisition module.

[0028] The second communication module is used to pair with the first communication module and exchange data, enabling the acquisition and processing board to communicate with the main controller.

[0029] Before the intelligent water and fertilizer integrated control machine is put into operation, the natural water and fertilizer loss rate (X ml / s) under each group of soil moisture, air temperature and air humidity values ​​needs to be measured in advance by controlling variables. A data table corresponding to soil moisture, air temperature and air humidity values ​​and the natural water and fertilizer loss rate needs to be established and the data needs to be stored in the second storage module. The water and fertilizer absorption rate of crops (Y ml / s) under each group of soil temperature values ​​needs to be measured in advance by controlling variables. A data table corresponding to the water and fertilizer absorption rate of crops and soil temperature needs to be established and the data needs to be stored in the second storage module.

[0030] The working principle of this intelligent integrated water and fertilizer control machine is as follows: soil temperature sensor, soil humidity sensor, soil nitrogen, phosphorus and potassium sensor, air temperature sensor and air humidity sensor respectively detect the soil temperature, soil humidity, soil nitrogen, phosphorus and potassium content, air temperature and air humidity, and feed the detection results back to the microprocessor module. The microprocessor module determines whether water and fertilizer need to be applied to the soil based on the soil nitrogen, phosphorus and potassium content. When the content of any element in the soil nitrogen, phosphorus and potassium is lower than the preset value, it is considered that water and fertilizer need to be applied.

[0031] When water and fertilizer application is required, the microprocessor module obtains the crop's water and fertilizer absorption rate at the current soil temperature. Simultaneously, it obtains data on water and fertilizer loss rates under these environmental conditions based on soil humidity, air temperature, and air humidity. Based on these absorption and loss rates, the microprocessor module calculates the required water and fertilizer flow rate. The required flow rate should equal the sum of the drip flow rates from all drip irrigation outlets in the farmland's network. The flow rate from each drip irrigation outlet is equal to the crop's water and fertilizer absorption rate and loss rate within its coverage area.

[0032] The microprocessor module sends the water and fertilizer flow data to the main control module. The main control module controls the opening of the water and fertilizer flow control valve 113 to ensure that the allowed flow value is equal to the required water and fertilizer flow value. Subsequently, the main control module controls the water source solenoid valve to open, controls the water pump to start, controls the raw material flow control valve 111 to open, and controls the stirring motor 104 to start. At this time, the water pump pumps external water into the inlet pipe 105, and the raw material liquid flows into the inlet pipe 105 through the raw material delivery pipe 109 to mix with the water. The mixed liquid flows into the mixing tank 103 and is stirred evenly by the stirring motor 104 to form water and fertilizer. The water and fertilizer flows into the field pipe network through the water and fertilizer delivery pipe 112, thus delivering water and fertilizer to the farmland at the required flow rate, which can ensure that the crops fully absorb water and fertilizer and effectively reduce the waste of water and fertilizer.

[0033] In this embodiment, during the water and fertilizer application process, the microprocessor control signal acquisition module continuously samples the signals from each sensor at regular intervals, and the sampling interval becomes shorter as soil moisture increases. Each time a sample is taken, the required water and fertilizer flow rate under the current environmental conditions is calculated, and this real-time required flow rate is sent to the main control module. The main control module then adjusts the flow rate of the water and fertilizer flow valve according to the real-time required flow rate to ensure that the two values ​​are equal.

[0034] Because the soil moisture level differs significantly before and during fertilization, the soil gradually becomes saturated with water and fertilizer during application, leading to increased soil moisture. Soil moisture directly affects the rate of water and fertilizer loss; specifically, higher soil moisture results in a lower rate of loss. If the required water and fertilizer flow rate is calculated based on the pre-application environmental conditions throughout the entire fertilization process, water and fertilizer overflow and waste will be inevitable.

[0035] By adopting continuous sampling and calculation and gradually shortening the sampling and calculation time interval, the water and fertilizer flow rate can be dynamically adjusted according to changes in soil moisture, thereby further reducing water and fertilizer waste and improving water and fertilizer utilization.

[0036] In this embodiment, the wind speed sensor can detect the wind speed in the farmland and feed the wind speed data back to the microprocessor module. Each time, the microprocessor module sends the calculated required water and fertilizer flow rate and the detected wind speed data to the main control module. Before controlling the water and fertilizer machine to perform the water and fertilizer application action, the main control module compares the detected wind speed value with the preset value. When the wind speed value is greater than the preset value, the main control module sets a delay time, which is less than the time interval between the first and second data acquisitions of the acquisition and processing board (this time interval is at least half an hour). After the delay time, the main control module controls the water and fertilizer machine to start water and fertilizer application, and stops water and fertilizer application when the main control module receives the next required water and fertilizer flow rate and wind speed data sent by the microprocessor module.

[0037] Then, repeat the above steps based on the required water and fertilizer flow rate and wind speed data for the next application until the water and fertilizer application is completed (the application is completed when the soil moisture reaches a certain value).

[0038] By delaying the application of water and fertilizer, we can wait for changes in wind speed. If the wind speed decreases after the delay, we can start applying water and fertilizer at this time to reduce the evaporation of water and fertilizer. If the wind speed does not change or increases after the delay, the time for applying water and fertilizer within the sampling interval is shortened, which can also reduce the evaporation of water and fertilizer and save water and fertilizer. However, it is necessary to delay the entire application time of water and fertilizer.

[0039] This avoids the need for continuous application of water and fertilizer to farmland during periods of strong wind.

[0040] Based on this, after the delay time, when the main control module controls the integrated water and fertilizer machine to start applying water and fertilizer, it first applies water and fertilizer for T1 seconds, then pauses applying water and fertilizer for T2 seconds, then applies water and fertilizer again for T1 seconds... and so on, until the main control module receives the next required water and fertilizer flow rate value and wind speed data sent by the microprocessor module.

[0041] This allows for intermittent water and fertilizer application, which further reduces water and fertilizer evaporation when facing constantly changing wind speeds in farmland.

[0042] In this embodiment, the microprocessor continuously samples the output signal of the air humidity sensor. When water and fertilizer need to be applied, the microprocessor module compares the previously collected multiple sets of air humidity values. When the three most recently measured air humidity values ​​continue to increase, the microprocessor module sends the calculated required water and fertilizer flow rate to the main control module. At the same time, it sends a waiting execution name to the main control module. At this time, the main control module is in standby mode and sends a prompt SMS to the manager's mobile phone through the GSM module, reminding the manager to confirm whether to start the water and fertilizer application action by operating the touch screen.

[0043] When air humidity continues to increase, it indicates that rain is likely. If it rains when water and fertilizer are being applied, it will inevitably lead to a significant loss and waste of water and fertilizer. In this case, it is advisable for management personnel to take manual action. Management personnel can decide whether to start water and fertilizer application based on weather forecasts and their experience in water and fertilizer application.

[0044] In this embodiment, a camera 204 is used to photograph crops. The camera 204 transmits the captured images to a microprocessor, which has a built-in image processing module. The image processing module analyzes and processes the captured images, identifies the crop type through feature points in the images (plant identification by image is an already implemented technology), and then matches the proportions of various raw material solutions (pre-set) to the crop according to the different nutrient requirements of different plant types. The raw material ratio data is sent to the main control module, which adjusts the proportions of various raw materials by controlling the raw material flow control valves 111 on each group of raw material delivery pipes 109, so that the various nutrients in the obtained water and fertilizer can better meet the needs of the crop.

[0045] The image processing module also scans all pixels in the image, acquires the color value of each pixel, and counts the number of pixels with a green color value. The crop growth is judged by the ratio of green pixels to the total number of pixels in the image; a higher proportion of green pixels indicates better crop growth. The crop growth is graded based on the proportion of green pixels, and a pre-set ratio of raw material solution to water is assigned to each growth level. Poor growth results in a higher ratio of raw material solution to water, while good growth results in a lower ratio. This ratio data is sent to the main control module, which controls the raw material flow control valve 111 and the water source solenoid valve 106 based on the ratio. With a constant water flow, the flow rate of the raw material solution can be adjusted by controlling the raw material flow control valve 111, thereby adjusting the ratio of raw material solution to water. This allows for differentiated adjustment of nutrient content in water and fertilizer based on crop growth, meeting the crop's nutrient needs while reducing nutrient waste.

[0046] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An intelligent integrated water and fertilizer control machine, characterized in that: The system includes a water and fertilizer control unit and a field monitoring terminal. The water and fertilizer control unit includes a frame, a control box fixed on the frame, a mixing tank, a stirring motor mounted on the mixing tank, an inlet pipe, a water and fertilizer delivery pipe, and several sets of raw material delivery pipes. One end of the inlet pipe is connected to the interior of the mixing tank, and the other end is connected to a water pump. A solenoid valve for the water source is installed on the inlet pipe. One end of the raw material delivery pipe is connected to the inlet pipe, and the other end is connected to a raw material tank. A raw material flow control valve is installed on the raw material delivery pipe. One end of the water and fertilizer delivery pipe is connected to the interior of the mixing tank. The other end of the delivery pipe is used to connect to the field pipeline network. A water and fertilizer flow control valve is installed on the water and fertilizer delivery pipe. The water and fertilizer control host also includes a main controller, which controls the water source solenoid valve, raw material flow control valve, water and fertilizer flow control valve, stirring motor, and water pump motor. The field monitoring terminal includes a support rod, the lower end of which is inserted into the farmland. A protective box is fixed to the support rod, and a wind speed sensor is installed on the top of the protective box. A crossbar is fixed to the upper end of the support rod, and a camera is mounted on the crossbar. The camera lens faces downwards to photograph the crops in the farmland. The protective box contains air. The protective enclosure includes a temperature sensor and an air humidity sensor. An external soil temperature sensor is installed for burying in the soil. Inside the enclosure is a data acquisition and processing board. The soil temperature sensor, soil humidity sensor, air temperature sensor, air humidity sensor, wind speed sensor, soil nitrogen, phosphorus, and potassium sensor, and a camera are all connected to the data acquisition and processing board, which is communicatively connected to the main controller. The data acquisition and processing board determines whether soil fertilization is needed based on the nitrogen, phosphorus, and potassium content of the soil. When the content of any one of these elements falls below a preset value, it is considered that fertilization is necessary. The temperature sensor acquires the water and fertilizer absorption rate of the crop at the current soil temperature. Simultaneously, the data acquisition and processing board obtains data on the water and fertilizer loss rate under the environmental conditions based on soil humidity, air temperature, and air humidity, and calculates the required water and fertilizer flow rate based on the water and fertilizer absorption rate and the water and fertilizer loss rate. The data acquisition and processing board sends the water and fertilizer flow rate data to the main controller, which controls the opening of the water and fertilizer flow control valve to ensure that the allowed flow rate is equal to the required water and fertilizer flow rate. At the same time, the main controller controls the water source solenoid valve to open, the water pump to start, the raw material flow control valve to open, and the stirring motor to start, thus initiating the application of water and fertilizer.

2. The intelligent water and fertilizer integrated control machine according to claim 1, characterized in that: in During the water and fertilizer application process, soil moisture values ​​are continuously sampled. Each time a sample is taken, the data acquisition and processing board calculates the required water and fertilizer flow rate under the current environmental conditions and sends the real-time required water and fertilizer flow rate to the main controller. The main controller adjusts the flow rate of the water and fertilizer flow valve according to the real-time required water and fertilizer flow rate to make the two equal.

3. The intelligent water and fertilizer integrated control machine according to claim 2, characterized in that: Each time, the data acquisition and processing board sends the calculated required water and fertilizer flow rate and the detected wind speed data to the main controller. Before controlling the intelligent water and fertilizer integrated controller to perform the water and fertilizer application action, the main controller compares the detected wind speed value with a preset value. When the wind speed value is greater than the preset value, the main control module sets a delay time, which is less than the time interval between the first and second data acquisitions by the data acquisition and processing board. After the delay time, the main controller controls the intelligent water and fertilizer integrated controller to start water and fertilizer application, and stops water and fertilizer application when the main controller receives the next required water and fertilizer flow rate and wind speed data sent by the data acquisition and processing board.

4. The intelligent water and fertilizer integrated control machine according to claim 3, characterized in that: After the delay time, when the main controller controls the intelligent water and fertilizer integrated control machine to start applying water and fertilizer, it first applies water and fertilizer for T1 seconds, then pauses applying water and fertilizer for T2 seconds, and then applies water and fertilizer again for T1 seconds. This cycle continues until the main control module receives the next required water and fertilizer flow rate value and wind speed data sent by the acquisition and processing board.

5. The intelligent water and fertilizer integrated control machine according to claim 4, characterized in that: The data acquisition and processing board continuously samples the air humidity value. When water and fertilizer need to be applied, the board compares the previously collected air humidity values. When the three most recently measured air humidity values ​​continue to increase, the board sends the calculated required water and fertilizer flow rate to the main controller. At the same time, it sends a waiting execution name to the main controller. At this time, the main controller is in standby mode and sends a prompt SMS to the administrator's mobile phone through the GSM module, reminding the administrator to confirm whether to start the water and fertilizer application action by operating the touch screen.

6. The intelligent water and fertilizer integrated control machine according to claim 1, characterized in that: The acquisition and processing board analyzes and processes the captured images, identifies the crop type by feature points in the images, and matches the proportion of various raw materials to the crop according to the different nutrient requirements of different types of plants. The acquisition and processing board sends the raw material proportion data to the main controller, and the main controller adjusts the proportion of various raw materials by controlling the raw material flow control valves on each group of raw material delivery pipes according to the raw material proportion.

7. The intelligent water and fertilizer integrated control machine according to claim 1, characterized in that: The acquisition and processing board scans all pixels in the captured image, obtains the color value of each pixel, counts the number of pixels with a green color value, and classifies the crop growth status by the ratio of green pixels to the total number of pixels in the image. Then, it matches the ratio of raw materials to water for each growth status. The acquisition and processing board sends the raw material to water ratio data to the main controller, and the main controller adjusts the flow rate of the raw material liquid according to the raw material to water ratio.

Images