Cooperative regulation method, device and equipment based on seedling greenhouse and storage medium

Abstract

This invention proposes a collaborative control method, device, equipment, and storage medium based on a seedling greenhouse. The method includes: acquiring multiple soil moisture values ​​from all soil moisture sensors; generating an irrigation command when at least one soil moisture value is greater than a first preset humidity threshold; sending the irrigation command to a fertigation system; controlling the fertigation system to perform irrigation operations on water-deficient cultivation ridges based on light values ​​acquired from a light intensity sensor; activating an external shading system when the light intensity value is greater than a preset light intensity threshold; acquiring air temperature and air humidity values ​​from an air temperature and humidity sensor at preset shading intervals; controlling a ventilation system to activate when the air humidity value is greater than or equal to a second preset humidity threshold, or controlling a cooling system to activate when the air humidity value is less than the second preset humidity threshold and the air temperature value is greater than a preset temperature threshold. According to the technical solution of this invention, the seedling efficiency and survival rate of crops cultivated in a seedling greenhouse can be improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural cultivation facility technology, and in particular to a collaborative control method, device, equipment and storage medium based on a seedling greenhouse. Background Technology

[0002] Magnolia officinalis var. concave-leaf is a valuable medicinal plant with relatively demanding requirements for its growing environment during the seedling stage. Seedlings prefer shade and dislike direct sunlight; they have shallow root systems, are intolerant of drought and waterlogging, and require careful water management. To create a suitable growing environment for Magnolia officinalis var. concave-leaf, it is planted in a seedling greenhouse. The greenhouse allows for adaptive adjustments to the light, water, and fertilizer conditions to meet its growth requirements.

[0003] Existing seedling greenhouses include automated irrigation and fertilization modules and solar supplemental lighting modules. Workers in the greenhouses control the automated irrigation module using thermometers and hygrometers to provide water for *Magnolia officinalis*, and control the solar supplemental lighting module based on the light intensity to provide light for the plant. This achieves intensive, large-scale, and standardized seedling cultivation of *Magnolia officinalis*. However, the control of water and light within the greenhouses, and the amount of water and light supplementation, are based on manual experience, resulting in insufficient environmental control capabilities. Consequently, the seedling efficiency and survival rate of crops cultivated in existing greenhouses are low. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a method, device, equipment, and storage medium for coordinated control of light, humidity, and temperature in a seedling greenhouse, which can automatically and coordinatedly control the light, humidity, and temperature in the seedling greenhouse, improve the dynamic balance management of the seedling greenhouse, and thus improve the seedling efficiency and survival rate of crops cultivated in the seedling greenhouse.

[0005] In a first aspect, embodiments of the present invention provide a collaborative control method based on a seedling greenhouse, applied to the central control system of the seedling greenhouse. The seedling greenhouse is internally equipped with a ventilation system, a cooling system, a water and fertilizer integration system, an air temperature and humidity sensor, a light intensity sensor, and multiple cultivation ridges. Each cultivation ridge is equipped with a soil moisture sensor. The seedling greenhouse is externally equipped with an external shading system. The central control system is communicatively connected to the ventilation system, the external shading system, the cooling system, the air temperature and humidity sensor, the light intensity sensor, and all the soil moisture sensors. The method includes:

[0006] Multiple soil moisture values ​​are obtained from all the soil moisture sensors. When at least one of the soil moisture values ​​is greater than a first preset humidity threshold, an irrigation command is generated. Light values ​​are obtained from the light intensity sensor. The irrigation command is sent to the water and fertilizer system. Based on the light intensity value, the water and fertilizer system is controlled to perform irrigation operations on the cultivation ridges corresponding to the soil moisture sensors whose soil moisture values ​​are greater than the first preset humidity threshold.

[0007] When the light value is greater than the preset light threshold, the external shading system is activated. After a preset shading time, the irrigation operation ends, and the air temperature and air humidity values ​​are obtained from the air temperature and humidity sensor.

[0008] When the air humidity value is greater than or equal to the second preset humidity threshold, the ventilation system is activated; or, when the air humidity value is less than the second preset humidity threshold and the air temperature value is greater than the preset temperature threshold, the cooling system is activated.

[0009] According to some embodiments of the present invention, the integrated water and fertilizer system includes a ridge drip irrigation device and a mobile sprinkler irrigation device. The ridge drip irrigation device includes a main pipe and multiple zone solenoid valves. The main pipe is connected to a water source. A mesh filter and all the zone solenoid valves are connected in series on the main pipe. Each zone solenoid valve corresponds to a cultivation ridge. The mobile sprinkler irrigation device includes a track, a traveling host, and a spray bar. The track is fixed to the roof truss of the seedling greenhouse. The traveling host can move on the track. The traveling host is hinged to the spray bar. The spray bar is equipped with multiple anti-drip micro-sprinklers.

[0010] Sending the irrigation command to the integrated water and fertilizer system, and controlling the integrated water and fertilizer system to perform irrigation operations on the cultivation ridges corresponding to the soil moisture sensors whose soil moisture values ​​are greater than the first preset moisture threshold based on the light value, including:

[0011] When the light value is greater than the preset light threshold, the movable sprinkler device is locked, and the irrigation command is sent to the zone solenoid valve corresponding to the soil moisture sensor whose soil moisture value is greater than the first preset moisture threshold, and the zone solenoid valve is opened.

[0012] Alternatively, when the light value is less than or equal to the preset light threshold, the drip irrigation device on the ridge is locked, the irrigation command is sent to the walking host, and the walking host drives the spray bar to move on the track.

[0013] According to some embodiments of the present invention, a drip irrigation tape is laid along the center line of the cultivation ridge, the drip irrigation tape is connected to the corresponding zone solenoid valve through a branch pipe, the mobile sprinkler irrigation device further includes a fertilizer injection system, the fertilizer injection system includes a storage tank and a fertilizer injection pump, the suction port of the fertilizer injection pump is connected to the storage tank, the discharge port of the fertilizer injection pump is connected to the water supply pipeline of the mobile host, and the water supply pipeline is connected to the sprinkler bar and the water supply network of the seedling greenhouse respectively;

[0014] Based on the light intensity, the integrated water and fertilizer system is controlled to perform irrigation operations on the cultivation ridges corresponding to the soil moisture sensors whose soil moisture values ​​are greater than the first preset moisture threshold, including:

[0015] The cultivation ridge corresponding to the soil moisture sensor whose soil moisture value is less than the first preset moisture threshold is identified as the target irrigation ridge. The irrigation command is sent to the partition solenoid valve corresponding to the target irrigation ridge. Upon receiving the irrigation command, the partition solenoid valve opens, and the main pipeline performs drip irrigation on the target irrigation ridge through the branch pipe, the partition solenoid valve, and the drip irrigation tape.

[0016] Alternatively, the traveling host receives the irrigation command, moves along the track, supplies power to the fertilizer pump, the storage tank injects fertilizer solution into the water supply pipeline through the fertilizer pump, and the spray bar performs sprinkler irrigation along the track under the drive of the traveling host.

[0017] According to some embodiments of the present invention, the seedling greenhouse is further provided with an internal heat preservation system. The internal heat preservation system includes an internal heat preservation curtain, an internal heat preservation drive motor, an internal transmission shaft, multiple bearing seats, a drive arm, an internal push rod, and a limit switch. The internal heat preservation drive motor is connected to the internal transmission shaft. The bearing seats are installed on the longitudinal tie rod of the seedling greenhouse. The internal transmission shaft is supported by multiple bearing seats. The end of the drive arm is hinged to one end of the internal push rod. The other end of the internal push rod is fixed to the side of the internal heat preservation curtain. The limit switch is used to detect the extreme positions of the internal heat preservation curtain when it is retracted or extended. The start control circuit of the movable sprinkler device is connected in series with the limit switch. The central control system is communicatively connected to the limit switch and the internal heat preservation drive motor.

[0018] Before sending the irrigation command to the mobile host, the method further includes:

[0019] The status of the internal insulation system is obtained. When the internal insulation curtain is in the unfolded state, the internal insulation system returns an unfolding signal to the central control system. The central control system controls the internal insulation drive motor to reverse, the internal insulation drive motor drives the internal transmission shaft to reverse, the internal transmission shaft drives the drive arm to swing, the drive arm drives the internal push rod to rotate, and controls the internal insulation curtain to retract. The internal insulation system returns a retracting signal to the central control system.

[0020] Alternatively, when the inner insulation curtain is in the retracted state, the inner insulation system returns a retracted signal to the central control system, and the central control system interrupts the communication connection with the inner insulation system.

[0021] The limit switch is manually triggered to control the start of the walking host.

[0022] According to some embodiments of the present invention, the external shading system includes an external truss, a guide rail, an external shading drive motor, an external transmission shaft, an external rack, an external push rod, and an external shading net. The external truss is located outside the seedling greenhouse. The guide rail is fixed parallel to the external truss. The external shading drive motor is fixed to the guide rail. The external shading drive motor is connected to the external transmission shaft via a flexible coupling. The external rack is fixed to the guide rail. Multiple drive gears are fixed at equal intervals on the external transmission shaft. The drive gears mesh with the external rack. The drive gears are connected to one end of the external push rod via an external push rod connector. The other end of the external push rod is fixed to the edge of the external shading net via a curtain clip.

[0023] Activating the external shading system includes:

[0024] The external sunshade drive motor is controlled to start, and the external sunshade drive motor drives the external transmission shaft and the drive gear to rotate through the flexible coupling;

[0025] All the drive gears move linearly along the outer rack, and the drive gears drive the outer push rod, the curtain clamp and the outer sunshade net to move on the guide rail through the outer push rod connector, and the outer sunshade net unfolds.

[0026] According to some embodiments of the present invention, the outer surface of the seedling greenhouse is covered with a film, and the ventilation system includes a top-rolling film ventilation mechanism and a side-rolling film ventilation mechanism. The top-rolling film ventilation mechanism includes an electric film roller and a top-rolling film rod. The electric film roller is fixed to the gable wall of the seedling greenhouse by a mounting frame. The output end of the electric film roller is connected to the top-rolling film rod through a universal coupling. The top-rolling film rod is arranged along the ridge of the seedling greenhouse. The side-rolling film ventilation mechanism includes a side-rolling film motor and a side-rolling film rod. The side-rolling film motor is arranged on the side facade of the seedling greenhouse. The side-rolling film motor is connected to the side-rolling film rod through a transmission mechanism. An insect-proof net is provided on the inner side of the side-rolling film rod.

[0027] Controlling the start of the ventilation system includes:

[0028] The cooling system sends its status to the central control system. When the cooling system is in the on state, the central control system locks the opening commands of the top roll-up film ventilation mechanism and the side roll-up film ventilation mechanism, and controls the ventilation system to be in the off state.

[0029] Alternatively, when the cooling system is off, the electric film winder is controlled to rotate forward, and the electric film winder drives the top film winding rod to rotate, winding the rollable portion of the film onto the top film winding rod and opening the top air vent.

[0030] Alternatively, when the cooling system is off, the side-winding film motor is controlled to rotate forward, and the side-winding film motor drives the side-winding film rod to rotate, winding the rollable portion of the film onto the side-winding film rod, thus opening the side air vent.

[0031] According to some embodiments of the present invention, the cooling system includes a negative pressure fan and a wet curtain device. The negative pressure fan and the wet curtain device are respectively installed on opposite gable walls of the seedling greenhouse. The wet curtain device includes wet curtain paper. A water inlet pipe is installed above the wet curtain paper, and a water collection tank is installed below it. A submersible pump, a water supply valve, and an overflow pipe are installed in the water collection tank. The submersible pump forms a circulating water circuit with the water inlet pipe through a water supply pipe. The circulating water circuit is equipped with valves. The central control system is electrically connected to the negative pressure fan and the submersible pump respectively.

[0032] Controlling the activation of the cooling system includes:

[0033] An electrical signal is sent to the power controller of the negative pressure motor to start the negative pressure motor, and an electrical signal is sent to the drive circuit of the submersible pump to control the submersible pump to start.

[0034] The submersible pump transfers the liquid in the water collection tank to the water supply pipe through the water supply pipe, and the water supply pipe wets the wet curtain paper.

[0035] Secondly, embodiments of the present invention provide a collaborative control device based on a seedling greenhouse, including at least one control processor and a memory for communicatively connecting with the at least one control processor; the memory stores instructions executable by the at least one control processor, the instructions being executed by the at least one control processor to enable the at least one control processor to perform the collaborative control method based on a seedling greenhouse as described in the first aspect above.

[0036] Thirdly, embodiments of the present invention provide an electronic device including a collaborative control device based on a seedling greenhouse as described in the second aspect above.

[0037] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions for performing the collaborative control method based on a seedling greenhouse as described in the first aspect above.

[0038] The collaborative control method based on a seedling greenhouse according to embodiments of the present invention has at least the following beneficial effects: Multiple soil moisture values ​​are acquired from all the soil moisture sensors; when at least one soil moisture value is greater than a first preset humidity threshold, an irrigation command is generated; light values ​​are acquired from the light intensity sensor; the irrigation command is sent to the integrated water and fertilizer system; based on the light intensity value, the integrated water and fertilizer system is controlled to perform irrigation operations on the cultivation ridges corresponding to the soil moisture sensors whose soil moisture values ​​are greater than the first preset humidity threshold; when the light intensity value is greater than a preset light intensity threshold, the external shading system is activated; after a preset shading time interval, the irrigation operation ends; air temperature and air humidity values ​​are acquired from the air temperature and humidity sensor; when the air humidity value is greater than or equal to a second preset humidity threshold, the ventilation system is controlled to start; or, when the air humidity value is less than the second preset humidity threshold and the air temperature value is greater than a preset temperature threshold, the cooling system is controlled to start. According to the technical solution of this invention, when the soil moisture is too low, irrigation is required for crops. However, since high temperature and high humidity are not conducive to crop growth, the external shading system is controlled based on the light value to reduce the temperature inside the seedling greenhouse. While performing irrigation, the light intensity in the seedling greenhouse is reduced. After irrigation, if the air humidity inside the seedling greenhouse is too high, it can lead to root hypoxia or water stress. Therefore, the ventilation system is activated to reduce the air humidity inside the seedling greenhouse. Alternatively, when the air humidity is at a suitable level for crop growth but the air temperature is too high, a cooling system is activated to prevent leaf burn, thereby reducing the temperature inside the seedling greenhouse. This achieves multi-factor automated and coordinated regulation of humidity, light, and temperature in the seedling greenhouse, improving the dynamic balance management of the seedling greenhouse and maintaining the air humidity, air temperature, and soil moisture inside the seedling greenhouse within a suitable environment for crop growth, thereby improving the seedling efficiency and survival rate of crops cultivated in the seedling greenhouse. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of a seedling greenhouse and an external shading system provided in one embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of a seedling greenhouse provided in another embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the top-rolling membrane ventilation mechanism provided in another embodiment of the present invention;

[0042] Figure 4 This is a flowchart of a collaborative control method based on a seedling greenhouse provided in another embodiment of the present invention;

[0043] Figure 5This is a structural diagram of a collaborative control device based on a seedling greenhouse provided in another embodiment of the present invention. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0046] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0047] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0048] This invention provides a collaborative control method, device, equipment, and storage medium based on a seedling greenhouse. The collaborative control method includes: acquiring multiple soil moisture values ​​from all soil moisture sensors; generating an irrigation command when at least one soil moisture value is greater than a first preset humidity threshold; acquiring light values ​​from a light intensity sensor; sending the irrigation command to a fertigation system; controlling the fertigation system to perform irrigation operations on the cultivation ridges corresponding to soil moisture sensors whose soil moisture values ​​are greater than the first preset humidity threshold based on the light intensity values; activating an external shading system when the light intensity value is greater than a preset light intensity threshold; ending the irrigation operation after a preset shading time interval; acquiring air temperature and air humidity values ​​from an air temperature and humidity sensor; controlling the ventilation system to activate when the air humidity value is greater than or equal to a second preset humidity threshold, or controlling the cooling system to activate when the air humidity value is less than the second preset humidity threshold and the air temperature value is greater than a preset temperature threshold. According to the technical solution of this invention, when the soil moisture is too low, irrigation is required for crops. However, since high temperature and high humidity are not conducive to crop growth, the external shading system is controlled based on the light value to reduce the temperature inside the seedling greenhouse. While performing irrigation, the light intensity in the seedling greenhouse is reduced. After irrigation, if the air humidity inside the seedling greenhouse is too high, it can lead to root hypoxia or water stress. Therefore, the ventilation system is activated to reduce the air humidity inside the seedling greenhouse. Alternatively, when the air humidity is at a suitable level for crop growth but the air temperature is too high, a cooling system is activated to prevent leaf burn, thereby reducing the temperature inside the seedling greenhouse. This achieves multi-factor automated and coordinated regulation of humidity, light, and temperature in the seedling greenhouse, improving the dynamic balance management of the seedling greenhouse and maintaining the air humidity, air temperature, and soil moisture inside the seedling greenhouse within a suitable environment for crop growth, thereby improving the seedling efficiency and survival rate of crops cultivated in the seedling greenhouse.

[0049] First, the method of this invention is applied to the central control system of a seedling greenhouse, referring to... Figure 1 and Figure 2 The seedling greenhouse is equipped with a ventilation system, a cooling system, a water and fertilizer integration system, an air temperature and humidity sensor, a light intensity sensor, and multiple cultivation ridges. The cultivation ridges are equipped with soil moisture sensors. The seedling greenhouse is equipped with an external shading system 100. The central control system is connected to the ventilation system, the external shading system 100, the cooling system, the air temperature and humidity sensor, the light intensity sensor, and all the soil moisture sensors.

[0050] It should be noted that the main framework of the seedling greenhouse includes main columns, main arches, secondary arches, trusses, longitudinal tie rods, diagonal braces, and diagonal support rods. The framework is covered with a polyolefin (PO) film 23. The main body of the greenhouse is constructed of high-strength hot-dip galvanized steel. The lower ends of the main columns are fixed to the ground, and the upper ends are connected to the main arches. Secondary arches are arranged parallel to adjacent main arches. Trusses are located at both ends of the greenhouse, connecting the main arches and main columns into a triangular stable structure via diagonal support rods. The longitudinal tie rods are fixedly connected to each arch via pipe clamps. The diagonal braces are arranged crosswise between adjacent main columns on the gable walls at both ends of the greenhouse, forming multiple triangular stable units together with the columns and longitudinal tie rods, significantly improving the lateral stiffness and overall stability of the framework. The longitudinal tie rods are arranged along the length of the greenhouse, with at least three sets located at the ridge and the shoulders on both sides, connecting all the independent arches longitudinally to form a longitudinal beam of the structure.

[0051] It should be noted that the main columns are made of 100×50×2.5mm hot-dip galvanized rectangular steel pipes, the main arches are made of 60×40×2mm hot-dip galvanized rectangular steel pipes, the secondary arches are made of 32×1.5mm diameter hot-dip galvanized steel pipes, and the spacing between the arches is 1.0 meter.

[0052] It should be noted that the environmental control system includes a ventilation system, an external shading system 100, an internal insulation system, a cooling system, and a water and fertilizer integration system. The ventilation system is driven by an electric film rolling device 21 to achieve air exchange between the inside and outside of the seedling greenhouse. The external shading system 100 and the internal insulation system are used to regulate the light and temperature inside the seedling greenhouse. The cooling system includes negative pressure fans and wet curtain devices installed on the gable walls of the seedling greenhouse to achieve forced cooling in high-temperature environments. The water and fertilizer integration system includes a ridge drip irrigation device and a mobile sprinkler irrigation device. The water and fertilizer integration system is used for precise water and fertilizer management.

[0053] It should be noted that the central control system is electrically connected to all environmental sensors and actuators through its input and output interfaces for coordinated management and linkage control of various systems. The central control system includes a PLC controller, which communicates with air temperature and humidity sensors, soil moisture sensors, and light intensity sensors, and controls each actuator through relay groups and motor drivers. The central control system integrates air temperature and humidity sensors, light intensity sensors, and soil moisture sensors with actuators to coordinate and regulate the ventilation system, external shading system 100, and cooling system. The central control system is centered on the PLC controller; its inputs are connected to the air temperature and humidity sensors, soil moisture sensors, and light intensity sensors, and its outputs are connected to the actuators of the environmental control system through relay groups and motor drivers.

[0054] In addition, the integrated water and fertilizer system includes a ridge drip irrigation device and a mobile sprinkler irrigation device. The ridge drip irrigation device includes a main pipeline and multiple zone solenoid valves. The main pipeline is connected to the water source. The main pipeline is connected in series with a mesh filter and all the zone solenoid valves. Each zone solenoid valve corresponds to a cultivation ridge. The mobile sprinkler irrigation device includes a track, a traveling main unit, and a spray bar. The track is fixed to the roof truss of the seedling greenhouse. The traveling main unit can move on the track and is hinged to the spray bar. The spray bar is equipped with multiple anti-drip micro-sprinklers.

[0055] It should be noted that the ridge drip irrigation device includes a main pipe, on which a mesh filter and a zone solenoid valve are connected in sequence. The zone solenoid valve is connected to the drip irrigation tape laid on the center line of the cultivation ridge through a branch pipe.

[0056] It should be noted that when the soil moisture sensor detects that the soil moisture value in a certain area is lower than the first preset moisture threshold, the PLC controller opens the corresponding zone solenoid valve. After the irrigation water passes through the main pipeline and the mesh filter, it enters the designated drip irrigation tape through the opened zone solenoid valve. The irrigation water flows out from the drippers on the drip irrigation tape, precisely irrigating the crop roots in that area.

[0057] It should be noted that the mobile sprinkler irrigation device includes a track, a traveling main unit, a spray boom, and a fertilizer injection system; the track is fixed to the greenhouse roof truss by a hanging frame; the traveling main unit is set on the track and obtains power through a traveling cable, and is connected to the greenhouse's fixed water supply network through an embedded flexible water delivery hose; the spray boom is connected to the traveling main unit through a hinge mechanism, allowing the spray boom to rotate between the working position and the upward-folded storage position.

[0058] It should be noted that the track is an 80×50×4mm lightweight I-beam track, which is fixed to the roof truss by a hanging bracket.

[0059] It should be noted that when foliar spraying or full-area irrigation is required, the PLC controller starts the mobile sprinkler system, and the traveling main unit moves at a constant speed along the track.

[0060] In addition, drip irrigation tape is laid along the center line of the cultivation ridge. The drip irrigation tape is connected to the corresponding zone solenoid valve through branch pipes. The mobile sprinkler irrigation device also includes a fertilizer injection system, which includes a storage tank and a fertilizer injection pump. The suction port of the fertilizer injection pump is connected to the storage tank, and the outlet of the fertilizer injection pump is connected to the water supply pipeline of the mobile host. The water supply pipeline is connected to the water supply network of the spray bar and the seedling greenhouse.

[0061] It should be noted that the fertilizer injection system includes a diaphragm-type fertilizer injection pump and a storage tank, which are connected to the water supply system of the mobile main unit via pipelines. The diaphragm-type fertilizer injection pump can precisely inject the fertilizer solution in the storage tank into the water supply pipeline in a specific ratio, realizing integrated water and fertilizer operation.

[0062] It should be noted that the drip irrigation tape is a 16mm diameter pressure-compensated drip irrigation tape with a dripper spacing of 15cm, which matches the plant spacing of the crops on the cultivation ridge.

[0063] It should be noted that the suction port of the diaphragm fertilizer injection pump in the fertilizer injection system is connected to the storage tank through the suction pipe, and its outlet is connected to the water supply pipeline of the mobile host through the injection pipe; the diaphragm fertilizer injection pump is driven by the power supply of the mobile host or is independently powered.

[0064] In addition, the seedling greenhouse is equipped with an internal insulation system, which includes an internal insulation curtain, an internal insulation drive motor, an internal transmission shaft, multiple bearing seats, a drive arm, an internal push rod, and limit switches. The internal insulation drive motor is connected to the internal transmission shaft, the bearing seats are installed on the longitudinal tie rods of the seedling greenhouse, the internal transmission shaft is supported by multiple bearing seats, the end of the drive arm is hinged to one end of the internal push rod, the other end of the internal push rod is fixed to the side of the internal insulation curtain, the limit switches are used to detect the extreme positions of the internal insulation curtain's retraction and expansion, the start control circuit of the movable sprinkler device is connected in series with the limit switches, and the central control system is communicatively connected to the limit switches and the internal insulation drive motor.

[0065] It should be noted that the internal insulation drive motor is connected to one end of the internal drive shaft, which is supported by multiple bearing seats and rotatably connected to the longitudinal tie rod of the main frame. Multiple drive arms are fixedly connected to the internal drive shaft along its length. The end of each drive arm is movably connected to one end of the internal push rod. The other end of the internal push rod is fixedly connected to the side of the internal insulation curtain through a curtain clip. The internal insulation drive motor or the internal drive shaft is also equipped with a limit switch for detecting the limit position of the internal insulation curtain's retraction and expansion. The limit switch is communicatively connected to the central control system. The internal insulation drive motor drives the internal drive shaft to rotate forward and backward, causing the drive arms to swing, thereby realizing the expansion and retraction of the internal insulation curtain through the internal push rod.

[0066] It should be noted that the inner insulation curtain is a composite woven curtain of aluminum foil and PE, with an opening rate of 5%-20%.

[0067] It should be noted that the internal drive shaft of the internal insulation system is coordinated with the installation height of the track of the movable sprinkler device (25b) to ensure that the traveling main unit and the folded spray bar can pass safely in the middle without any movement interference.

[0068] It should be noted that when the temperature drops at night, the PLC controller of the central control system starts the internal insulation drive motor. The motor rotates, driving the internal transmission shaft to rotate, and the drive arm fixed to it moves in a circular motion. The drive arm, through a hinge, pushes the internal push rod in a linear motion, thus unfolding the internal insulation curtain to both sides, forming an insulating air layer inside the shed, effectively reducing heat loss. When it is necessary to retract the internal insulation curtain, the motor reverses, the drive arm pulls the internal push rod back, causing the insulation curtain to retract to both sides of the shed, and a retraction signal is fed back to the central control system via limit switches.

[0069] Additionally, refer to Figure 1 The external shading system 100 includes an external truss 11, a guide rail 12, an external shading drive motor 13, an external drive shaft, an external rack, an external push rod, and an external shading net 14. The external truss 11 is located outside the seedling greenhouse. The guide rail 12 is fixed parallel to the external truss 11. The external shading drive motor 13 is fixed to the guide rail 12. The external shading drive motor 13 is connected to the external drive shaft through a flexible coupling. The external rack is fixed to the guide rail 12. Multiple drive gears are fixed at equal intervals on the external drive shaft. The drive gears mesh with the external rack. The drive gears are connected to one end of the external push rod through an external push rod connector. The other end of the external push rod is fixed to the edge of the external shading net 14 through a curtain clip.

[0070] It should be noted that the external truss 11 is set outside the PO film 23, and the external truss 11 is fixedly connected to the main column of the greenhouse body through support columns; the external shading system 100 also includes an external shading drive motor 13 fixedly installed at the end or middle of the external truss 11. The output end of the external shading drive motor 13 is connected to a full-length external drive shaft through a coupling, and multiple drive gears are fixed on the external drive shaft. A guide rail 12 is arranged parallel to the external truss 11, and an external rack is fixedly installed on the guide rail 12. The drive gears mesh with the external rack fixedly installed on the guide rail 12, and the drive gears are supported on the guide rail 12 through bearing seats. An external push rod connector is hinged to the bearing seat of each drive gear. The other end of the external push rod connector is hinged to one end of a vertically arranged external push rod. The top end of the external push rod is fixedly connected to the edge rope of the external shading net 14 through a curtain clip.

[0071] It should be noted that the outer sunshade net 14 is made of black polyethylene with a light-blocking rate of 70-80%. It is guided by UV-resistant polyester curtain lines on both sides with a curtain line spacing of 0.4-0.6 meters. The outer sunshade net 14 has a reinforced edge with tensile fiber ropes embedded in the edge to withstand the tension of the transmission system.

[0072] Additionally, refer to Figure 3The outer surface of the seedling greenhouse is covered with a film 23. The ventilation system includes a top-rolling film ventilation mechanism 200 and a side-rolling film ventilation mechanism. The top-rolling film ventilation mechanism 200 includes an electric film roller 21 and a top-rolling film rod 22. The electric film roller 21 is fixed to the gable wall of the seedling greenhouse by a mounting frame. The output end of the electric film roller 21 is connected to the top-rolling film rod 22 by a universal coupling. The top-rolling film rod 22 is set along the ridge of the seedling greenhouse. The side-rolling film ventilation mechanism includes a side-rolling film motor and a side-rolling film rod. The side-rolling film motor is set on the side facade of the seedling greenhouse. The side-rolling film motor is connected to the side-rolling film rod by a transmission mechanism. An insect-proof net is set on the inner side of the side-rolling film rod.

[0073] It should be noted that the electric film rolling machine 21 is fixed to the gable wall of the seedling greenhouse by a mounting frame, and its output end is connected to the top film rolling rod 22 set along the ridge through a universal coupling.

[0074] It should be noted that the PO film 23 is provided with a top ventilation opening and a side ventilation opening at the positions corresponding to the top film ventilation mechanism 200 and the side film ventilation mechanism, respectively; the lower edge of the top ventilation opening is fixed to the frame by the first slot assembly, and the upper edge is fixed to the top film rod 22 by the second slot assembly; the bottom edge of the side ventilation opening is fixed to the frame by the third slot assembly, and the top edge is fixed to the side film rod by the fourth slot assembly.

[0075] It should be noted that the top film winding rod 22 and the side film winding rod are driven to rotate by the corresponding electric film winding machine 21 and the side film winding motor, respectively. By winding or releasing the rollable part of the PO film 23 fixed on it, the top ventilation port and the side ventilation port are opened and closed.

[0076] It should be noted that the insect-proof net is a 40-60 mesh white nylon insect-proof net, which is fixed to the upright on the inside of the side roll film rod by a slot.

[0077] In addition, the cooling system includes a negative pressure fan and a wet curtain device. The negative pressure fan and the wet curtain device are respectively installed on the opposite gable walls of the seedling greenhouse. The wet curtain device includes wet curtain paper, with a water supply pipe above the wet curtain paper and a water collection tank below it. The water collection tank is equipped with a submersible pump, a water supply valve, and an overflow pipe. The submersible pump forms a circulating water circuit with the water supply pipe and the water supply pipe. The circulating water circuit is equipped with valves. The central control system is electrically connected to the negative pressure fan and the submersible pump respectively.

[0078] It should be noted that the cooling system includes a negative pressure fan installed on one gable wall and a wet curtain device installed on the opposite gable wall. The wet curtain device includes wet curtain paper, with a water supply pipe above the wet curtain paper and a water collection tank below it. A submersible pump is installed in the water collection tank, and the submersible pump is connected to the water supply pipe through a water supply pipe to form a circulating water circuit. The water supply pipe of the wet curtain device is equipped with a valve for adjusting the water volume, and the water collection tank is equipped with a water replenishment valve and an overflow pipe. Both the negative pressure fan and the submersible pump are electrically connected to the central control system, which coordinates their start and stop according to the temperature signal inside the greenhouse.

[0079] It should be noted that the thickness of the wet curtain paper is 100mm. It is composed of corrugated paper sheets stacked and bonded at a specific angle to form a honeycomb matrix, with the included angle of the corrugations being 45°±5°.

[0080] When the temperature inside the seedling greenhouse becomes too high, the PLC controller of the central control system simultaneously activates the negative pressure fan and submersible pump. The submersible pump pumps water from the collection tank into the water supply pipe, evenly wetting the entire surface of the wet curtain paper. At the same time, the negative pressure fan operates, forcibly extracting air from the greenhouse and creating negative pressure. Dry, hot air from outside is drawn in under this pressure and passes through the moistened wet curtain paper. The evaporation of moisture absorbs a large amount of heat from the air, thus making the air entering the greenhouse cool and humid, achieving forced evaporative cooling.

[0081] The following is based on Figures 1 to 3 The seedling greenhouse shown further illustrates the technical solution of this embodiment of the invention.

[0082] Reference Figure 4 , Figure 4 The flowchart illustrates a collaborative control method based on a seedling greenhouse, as provided in this embodiment of the invention. This collaborative control method includes, but is not limited to, the following steps:

[0083] S10: Obtain multiple soil moisture values ​​from all soil moisture sensors. When at least one soil moisture value is greater than a first preset moisture threshold, generate an irrigation command. Obtain light values ​​from the light intensity sensor and send the irrigation command to the fertigation system. Based on the light intensity value, control the fertigation system to perform irrigation operations on the cultivation ridges corresponding to the soil moisture sensors whose soil moisture values ​​are greater than the first preset moisture threshold.

[0084] It should be noted that this step is used to achieve coordinated water control within the seedling greenhouse. The input terminals of the PLC controller in the central control system are connected to soil moisture sensors and light intensity sensors, while its output terminals are connected to the zone solenoid valves of the ridge drip irrigation device and the mobile sprinkler unit of the fertigation system, respectively. When the soil moisture is lower than the set threshold, the PLC controller can automatically select and activate either the ridge drip irrigation device or the mobile sprinkler unit based on the real-time light intensity.

[0085] S20: When the light intensity is greater than the preset light intensity threshold, the external shading system is activated. After a preset shading time, the irrigation operation ends, and the air temperature and humidity values ​​are obtained from the air temperature and humidity sensor.

[0086] It should be noted that this step is used to achieve coordinated control of light intensity within the seedling greenhouse. The input terminal of the PLC controller is connected to a light intensity sensor, and its output terminal is connected to an external shading system. When the light intensity exceeds a preset threshold, i.e., the light intensity sensor detects excessive light, the PLC controller activates the external shading system to prevent strong light from scorching the seedlings at the source. After a preset shading interval, irrigation is completed. Based on the air temperature and humidity values ​​inside the greenhouse, it is determined whether the ventilation or cooling system needs to be activated, thereby achieving precise coordinated control of temperature while maintaining stable light intensity.

[0087] S30: When the air humidity value is greater than or equal to the second preset humidity threshold, control the ventilation system to start; or when the air humidity value is less than the second preset humidity threshold and the air temperature value is greater than the preset temperature threshold, control the cooling system to start.

[0088] It should be noted that the collaborative control method based on seedling greenhouses in this application can achieve collaborative decision-making and linkage control of environmental factors within the seedling greenhouse, including collaborative control of temperature, moisture, and light. The input terminal of the PLC controller is connected to an air temperature and humidity sensor, and its output terminal is connected to the drive motors of the external shading system, ventilation system, and cooling system, respectively. When the air temperature value is greater than the preset temperature threshold, the PLC controller first controls the external shading system to start, and then, based on the air humidity value returned by the air humidity sensor, selectively starts the cooling system or controls the ventilation system to operate at maximum opening.

[0089] It should be noted that after the preset shading time, the irrigation operation ends. When the air temperature value is greater than the preset temperature threshold, that is, the temperature inside the greenhouse remains high, the ventilation system or cooling device will be activated in conjunction with the air humidity to perform auxiliary cooling, thereby achieving precise and coordinated temperature control while maintaining stable light.

[0090] It should be noted that the central control system initiates the cooling program based on air humidity. When the air humidity is less than the second preset humidity threshold, the cooling system is activated in addition to the external shading system to further enhance the cooling effect in the seedling greenhouse through evaporative heat absorption. If the air humidity is greater than or equal to the second preset humidity threshold, i.e., the air humidity is already high, the ventilation system is opened to its maximum extent in addition to the external shading system to quickly expel the hot air accumulated in the greenhouse through convection and avoid a high temperature and high humidity environment.

[0091] It should be noted that the central control system integrates multiple control subsystems such as ventilation, shading, heat preservation, cooling, and water and fertilizer irrigation in the seedling greenhouse, realizing real-time monitoring and automated regulation of environmental factors. This changes the traditional greenhouse management model that relies on manual labor and has a lagging control, significantly reducing the cost of manual management. At the same time, it creates a continuous, stable, and suitable growth environment for Magnolia officinalis seedlings, significantly improving the quality and efficiency of seedling cultivation.

[0092] This invention relates to a collaborative control method for seedling greenhouses, belonging to the field of modern agricultural equipment and facility cultivation technology. The method relies on a central control system with a PLC as its core. This system collects environmental data from the seedling greenhouse in real time using sensors for air temperature and humidity, soil moisture, and light intensity. Based on a built-in collaborative decision-making program, it controls the ventilation system, cooling system, fertigation system, external shading system, and internal insulation system installed in the greenhouse, enabling coordinated management and intelligent control of multiple environmental factors such as light, temperature, and moisture. By dynamically optimizing and stably maintaining the required light, temperature, humidity, and moisture conditions throughout the entire process of sowing or cutting propagation, based on the biological characteristics of the crops grown in the seedling greenhouse, the method effectively improves seedling survival rate and production efficiency.

[0093] In another embodiment, in step S10, an irrigation command is sent to the integrated water and fertilizer system, and the integrated water and fertilizer system is controlled to perform irrigation operations on the cultivation ridges corresponding to soil moisture sensors whose soil moisture values ​​are greater than a first preset moisture threshold, based on the light value. This includes, but is not limited to, the following steps:

[0094] S111, when the light value is greater than the preset light threshold, lock the movable sprinkler device, send an irrigation command to the zone solenoid valve corresponding to the soil moisture sensor whose soil moisture value is greater than the first preset moisture threshold, and the zone solenoid valve opens.

[0095] S112, or, when the light value is less than or equal to the preset light threshold, lock the ridge drip irrigation device, send an irrigation command to the walking host, and the walking host drives the spray bar to move on the track.

[0096] It should be noted that the PLC controller of the central control system initiates the irrigation program when the soil moisture value returned by the soil moisture sensors deployed on different cultivation ridges is lower than the first preset humidity threshold. Before issuing the irrigation command, the PLC controller reads the light intensity value returned by the light intensity sensor. If the light intensity value is higher than the preset light intensity threshold, to prevent leaf scorch of the crops, the PLC controller locks the movable sprinkler irrigation device and switches to activating the ridge drip irrigation device in the corresponding area to provide precise root irrigation for the crops. During periods of low light or at night, when the light intensity value is lower than the preset light intensity threshold, the ridge drip irrigation device is activated to perform foliar irrigation or full-area irrigation. After the irrigation operation is completed, the PLC controller continuously monitors the air humidity inside the seedling greenhouse. If the air humidity inside the greenhouse remains higher than the second preset humidity threshold, the ventilation system is automatically activated to exchange air until the humidity inside the greenhouse returns to normal, thus forming a closed-loop water management system.

[0097] It should be noted that the PLC controller of the central control system automatically controls the opening and closing of the zone solenoid valves based on feedback from the soil moisture sensor. Through independent drip irrigation devices on the ridge surface and control of the zone solenoid valves, independent and quantitative precise irrigation can be carried out according to the actual water requirements of different cultivation ridges. This precise zoned irrigation mode meets the differentiated soil moisture requirements of seedlings at different growth stages, creates an optimal water environment for root growth, and effectively avoids root hypoxia or water stress caused by traditional flood irrigation.

[0098] In another embodiment, in step S10, the fertigation system is controlled based on the light intensity to perform irrigation on the cultivation ridges corresponding to soil moisture sensors whose soil moisture values ​​are greater than a first preset moisture threshold. This includes, but is not limited to, the following steps:

[0099] S121, the cultivation ridge corresponding to the soil moisture sensor whose soil moisture value is less than the first preset moisture threshold is identified as the target irrigation ridge, and an irrigation command is sent to the partition solenoid valve corresponding to the target irrigation ridge. Upon receiving the irrigation command, the partition solenoid valve opens, and the main pipeline performs drip irrigation operation on the target irrigation ridge through the branch pipe, the partition solenoid valve and the drip irrigation tape.

[0100] S122, or, the traveling host receives an irrigation command, the traveling host moves on the track, the traveling host supplies power to the fertilizer pump, the storage tank injects fertilizer solution into the water supply pipeline through the fertilizer pump, and under the drive of the traveling host, the spray bar performs sprinkler irrigation operation along the track.

[0101] It should be noted that the "root zone-canopy" water and fertilizer management of crops in the seedling greenhouse is achieved through a mobile sprinkler irrigation device and a ridge drip irrigation device. The input terminals of the PLC controller are connected to the soil moisture sensor and the light intensity sensor, respectively, and its output terminals are connected to the zone solenoid valves of the ridge drip irrigation device and the mobile main unit of the mobile sprinkler irrigation device, respectively. This ensures that the PLC controller can start the irrigation program based on the soil moisture value returned by the soil moisture sensor, and intelligently decide the irrigation mode by coupling the light intensity value of the light sensor. Under strong light conditions, the drip irrigation device is activated for root irrigation; under weak light conditions or when foliar operations are required, the sprinkler irrigation device is activated. This allows for the scheduling of the start and stop of the two irrigation modes, achieving differentiated and precise management of the crop root zone and canopy, and meeting the differentiated needs of different growth stages of the crop.

[0102] It should be noted that the integrated mobile sprinkler irrigation device and fertilization system achieve automated integration of mobile sprinkler irrigation and fertilization. This not only enables uniform and efficient foliar irrigation and fertilization, significantly improving water and fertilizer utilization, but also significantly reduces labor costs and intensity, making it particularly suitable for the air humidity and foliar nutrient requirements of Magnolia officinalis seedlings.

[0103] It should be noted that after the mobile host receives the irrigation command, the liquid tank injects fertilizer solution into the water supply pipeline through the fertilizer injection pump. The water supply pipeline is used to supply irrigation water, thereby realizing the mixing of irrigation water and fertilizer solution. The spray bar sprays the mixed liquid of irrigation water and fertilizer solution, thereby realizing water and fertilizer irrigation. The sprinkler irrigation operation of this invention includes foliar sprinkler irrigation operation and whole-area sprinkler irrigation operation.

[0104] In another embodiment, in step S112, before sending the irrigation command to the mobile host, the following steps are included, but are not limited to:

[0105] S1121, Obtain the status of the internal insulation system. When the internal insulation curtain is in the unfolded state, the internal insulation system returns an unfolding signal to the central control system. The central control system controls the internal insulation drive motor to reverse, the internal insulation drive motor drives the internal transmission shaft to reverse, the internal transmission shaft drives the drive arm to swing, the drive arm drives the internal push rod to rotate, controls the internal insulation curtain to close, and the internal insulation system returns a closing signal to the central control system.

[0106] S1122, or, when the inner insulation curtain is in the retracted state, the inner insulation system returns a retracted signal to the central control system, and the central control system interrupts the communication connection with the inner insulation system.

[0107] S1123, manually trigger the limit switch to control the start of the traveling main unit.

[0108] It should be noted that the central control system program has a motion interference interlock mechanism. When the PLC controller is about to send an irrigation command to the mobile sprinkler system, the PLC controller will first check the limit switch status of the inner insulation curtain. If the inner insulation curtain is not in the fully retracted state, the PLC controller will give priority to sending a retraction command to the inner insulation system. Only after receiving a feedback signal that the inner insulation curtain has been retracted will the mobile sprinkler system be allowed to start, thereby effectively avoiding motion interference between the spray bar and the insulation curtain.

[0109] It should be noted that, to implement the motion interference interlock mechanism, the start-up control circuit of the movable sprinkler system is connected in series with the limit switch signal of the internal insulation system. The drive circuit of the sprinkler system can only be activated when the internal insulation curtain retracts and physically triggers the limit switch, thereby effectively avoiding motion interference between devices, preventing spatial or logical conflicts between actuators during operation, and ensuring the reliability and safety of the system operation.

[0110] In another embodiment, in step S20, activating the external shading system includes, but is not limited to, the following steps:

[0111] S211 controls the start of the external sunshade drive motor, which drives the external transmission shaft and drive gear to rotate through a flexible coupling.

[0112] S212, all drive gears move linearly along the external rack, and the drive gears drive the external push rod, curtain clamp and external sunshade net to move on the guide rail through the external push rod connector, and the external sunshade net unfolds.

[0113] It should be noted that when the illuminance value returned by the illuminance sensor exceeds the preset illuminance threshold, i.e., when the illuminance sensor detects excessive light, the PLC controller activates the external sunshade drive motor. The external sunshade drive motor rotates, thereby driving the external transmission shaft and its drive gear to rotate. Since the external rack is fixed, the rotation of the drive gear is converted into linear motion along the external rack, thus moving the entire drive mechanism on the guide rail. The movement of the drive mechanism pushes the external sunshade net outward via the external push rod, achieving sun shading. The retraction process involves the external sunshade drive motor reversing, causing the drive mechanism to move in the opposite direction, pulling the sunshade net back via the external push rod.

[0114] In another embodiment, step S30 involves controlling the ventilation system to start, including but not limited to the following steps:

[0115] S311, the cooling system sends the status of the cooling system to the central control system. When the cooling system is in the on state, the central control system locks the opening commands of the top roll-up film ventilation mechanism and the side roll-up film ventilation mechanism, and controls the ventilation system to be in the off state.

[0116] S312, or, when the cooling system is off, control the electric film winder to rotate forward, the electric film winder drives the top film winding rod to rotate, and winds the rollable part of the film onto the top film winding rod, opening the top air vent;

[0117] S313, or, when the cooling system is off, control the side film winding motor to rotate forward, the side film winding motor drives the side film winding rod to rotate, winding the rollable part of the film onto the side film winding rod, and opening the side air vent.

[0118] It should be noted that the central control system is equipped with a system performance interlock mechanism. When the cooling system is running, the PLC controller will automatically override and lock the ventilation system's start command, sending a lock signal to the ventilation system's drive circuit to prevent the top and side roll-up film ventilation mechanisms from opening. This system performance interlock mechanism ensures that the ventilation system remains closed during the forced cooling mode in the seedling greenhouse, forcing airflow through the wet curtain device for cooling. This guarantees the efficiency of the negative pressure ventilation flow field, prevents airflow short-circuiting, and ensures optimal cooling performance of the cooling system. The system performance interlock mechanism also prevents spatial or logical conflicts between actuators during operation, ensuring the reliability and safety of the system.

[0119] It should be noted that when the PLC controller determines that ventilation is needed in the seedling greenhouse based on sensor data, it will control the electric film roller and / or the side film roller motor to start, thereby opening the top and / or side ventilation openings to achieve air exchange. During this process, the insect-proof net on the side can effectively prevent pests from entering. When it is necessary to close the ventilation openings, the electric film roller and / or the side film roller motor will reverse to release the film and restore the covering state.

[0120] In another embodiment, step S30 involves controlling the cooling system to start, including but not limited to the following steps:

[0121] S321 sends an electrical signal to the power controller of the negative pressure motor, which starts the negative pressure motor and sends an electrical signal to the drive circuit of the submersible pump to control the submersible pump to start.

[0122] S322, the submersible pump transfers the liquid in the collection tank to the water supply pipe through the water supply pipe, and the water supply pipe wets the wet curtain paper.

[0123] It should be noted that the cooling system operates in tandem with the negative pressure fan and the evaporative cooling pad. The output of the PLC controller is connected to the power controller of the negative pressure fan and the submersible pump drive circuit of the evaporative cooling pad, respectively. This ensures that when the cooling program is started, the PLC controller can synchronously output start signals to the drive circuits of both devices, causing the negative pressure fan and the submersible pump to run synchronously. By utilizing the principle of heat absorption through water evaporation, they work together to achieve forced evaporative cooling of the greenhouse environment.

[0124] It should be noted that when the PLC controller initiates the cooling program based on the temperature signal, it simultaneously controls the negative pressure fan and the submersible pump of the evaporative cooling pad to start. The submersible pump delivers water to the water pipes on the evaporative cooling pad, evenly wetting it; at the same time, the negative pressure fan operates, creating negative pressure inside the shed, guiding outside air through the moistened evaporative cooling pad, achieving synergistic cooling through moisture evaporation. Both components of this cooling system must operate synchronously to achieve the preset cooling efficiency.

[0125] To better understand the technical solution of this application, the following two embodiments are provided:

[0126] Example 1:

[0127] Prepare crops for seedling cultivation, treat seeds, and sow them onto planting ridges;

[0128] Temperature management is implemented in the seedling greenhouse by real-time monitoring of the indoor temperature using air temperature and humidity sensors. When the nighttime temperature is below 15℃, the central control system automatically activates the inner insulation curtain to maintain a suitable temperature. When the daytime temperature exceeds 28℃, the external shading system is activated, and tiered adjustments are made based on air humidity. When the air humidity is below 70%, the cooling system is activated in conjunction with the system. When the air humidity is above 70%, the ventilation system is opened to its maximum extent for convection ventilation and cooling.

[0129] Light management is implemented in the seedling greenhouse. Light intensity sensors continuously monitor the light intensity inside the greenhouse. When the light value exceeds the set threshold, the external shading system is automatically activated. Throughout the seedling cultivation process, the system executes programmed light management: maintaining a high degree of shading during the seedling stage, and gradually reducing the external shading net as the seedlings grow to the rapid growth stage and the pre-hardening stage, thereby gradually increasing the light intensity and training the seedlings' ability to adapt to natural light.

[0130] Water management is implemented in the seedling greenhouse. Soil moisture sensors monitor changes in substrate moisture. When soil moisture is insufficient, the central control system intelligently selects the irrigation mode based on light intensity: during periods of light intensity greater than 20 Klux, the drip irrigation device on the ridges is activated for root zone irrigation; during periods of low light or at night, the mobile sprinkler system is activated for foliar irrigation. The drip irrigation device achieves precise water management for different cultivation ridges through zoned solenoid valves, while the sprinkler system is responsible for maintaining 85%-90% air humidity. When the air humidity remains above 90%, the system will automatically activate the ventilation system for air exchange to prevent seedling diseases such as damping-off and seedling blight caused by high humidity.

[0131] In addition, pest and disease control is carried out on crops in the seedling greenhouse. The insect-proof netting set inside the side-rolled film ventilation mechanism forms a permanent physical barrier. The system has a preset high humidity alarm mechanism. When the air humidity exceeds 85% for a continuous period, the ventilation system will be automatically activated to dehumidify. During the peak period of disease, appropriate biological pesticides or low-toxicity chemical pesticides can be added through the fertilizer injection system for prevention and control.

[0132] Example 2:

[0133] The selection and treatment of cuttings, substrate preparation, and cutting propagation are carried out for crops.

[0134] Temperature management is implemented in the seedling greenhouse. Air temperature and humidity sensors inside the greenhouse monitor air temperature and humidity in real time. Based on the air temperature and humidity values ​​returned by the sensors, the PLC controller performs coordinated control according to the following strategy:

[0135] When managing the temperature in the seedling greenhouse, if the temperature inside the greenhouse remains above 28℃, the central control system, while maintaining shading, takes different measures based on the air humidity: when the air humidity is below 70%, the cooling system is activated in conjunction with the greenhouse. At this time, the air is relatively dry, and the evaporative cooling efficiency is high, which can effectively lower the temperature and increase the humidity at the same time; or, when the air humidity is above 70%, the ventilation system is opened to its maximum extent. If the wet curtain is used at this time, it will further aggravate the high humidity environment and easily cause diseases. Therefore, the hot air accumulated in the greenhouse is expelled first through convection ventilation. Through the above coordinated control, the ambient temperature is stabilized within the optimal rooting range of 25-28℃ during the day and -25℃ at night.

[0136] When managing light in the seedling greenhouse, given the characteristic that Magnolia officinalis cuttings are afraid of strong light during the rooting period, the external shading system should be set up immediately after cutting to create a continuous shaded environment. At the same time, the central control system is set to automatically activate the external shading system when the light intensity sensor detects that the light intensity exceeds 25 Klux. This is a key measure to prevent leaf burn and maintain the vitality of the cuttings.

[0137] When managing water in the seedling greenhouse, a mobile sprinkler system is used to perform intermittent automatic spraying, spraying for 20-30 seconds every 60 minutes to maintain air humidity at 85%-95%, ensuring that the cutting leaves do not wilt due to water loss. At the same time, the ridge drip irrigation system and its zoned solenoid valves achieve initial thorough watering and subsequent precise zoned watering, ensuring that the substrate is moist but not waterlogged. When the air humidity remains above 95%, the system automatically activates the ventilation system for short-term air exchange to prevent excessive moisture from causing mold growth.

[0138] About 25-30 days after cutting, the cuttings will form new roots. After the seedlings have grown steadily, the system will implement a programmed hardening-off process. This will be done by gradually reducing the frequency of spraying, tightening the external shading system, and increasing ventilation, so that the light, temperature, and humidity parameters of the seedlings' environment will gradually approach the natural external environment. Once the hardening-off process is complete, the seedlings can be transplanted.

[0139] In summary, the collaborative control method based on the seedling greenhouse of the present invention deeply integrates the hardware of the seedling greenhouse with the biological characteristics of Magnolia officinalis, which can provide stable environmental conditions for the sowing and cutting propagation of Magnolia officinalis, significantly improve the seedling survival rate and efficiency, and is a reliable method to ensure its efficient and standardized seedling cultivation.

[0140] like Figure 5 As shown, Figure 5 This is a structural diagram of a collaborative control device based on a seedling greenhouse provided in one embodiment of the present invention. The present invention also provides a collaborative control device based on a seedling greenhouse, comprising:

[0141] The processor 401 can be implemented using a general-purpose central processing unit (CPU), microprocessor, application specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application.

[0142] The memory 402 can be implemented as a read-only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM). The memory 402 can store the operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 402 and called and executed by the processor 401 to implement the collaborative control method based on seedling greenhouses according to the embodiments of this application.

[0143] Input / output interface 403 is used to implement information input and output;

[0144] The communication interface 404 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0145] Bus 405 transmits information between various components of the device (e.g., processor 401, memory 402, input / output interface 403, and communication interface 404);

[0146] The processor 401, memory 402, input / output interface 403 and communication interface 404 are connected to each other within the device via bus 405.

[0147] This application also provides an electronic device, including the collaborative control device based on a seedling greenhouse as described above.

[0148] This application embodiment also provides a storage medium, which is a computer-readable storage medium, storing a computer program that, when executed by a processor, implements the above-described collaborative control method based on a seedling greenhouse.

[0149] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof. The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate, and may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0150] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0151] The above provides a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

Claims

1. A collaborative control method based on a seedling greenhouse, characterized in that, The central control system applied to the seedling greenhouse includes an internal ventilation system, a cooling system, a fertigation system, an air temperature and humidity sensor, a light intensity sensor, and multiple cultivation ridges. Each cultivation ridge is equipped with a soil moisture sensor. An external shading system is installed on the exterior of the seedling greenhouse. The central control system is communicatively connected to the ventilation system, the external shading system, the cooling system, the air temperature and humidity sensor, the light intensity sensor, and all the soil moisture sensors. The fertigation system includes the ridge surface... The system includes a drip irrigation device and a portable sprinkler irrigation device. The drip irrigation device for ridges includes a main pipe and multiple zone solenoid valves. The main pipe is connected to a water source. A mesh filter and all the zone solenoid valves are connected in series on the main pipe. Each zone solenoid valve corresponds to a cultivation ridge. The portable sprinkler irrigation device includes a track, a traveling motor, and a spray bar. The track is fixed to the roof truss of the seedling greenhouse. The traveling motor can move along the track and is hinged to the spray bar. The spray bar is equipped with multiple anti-drip micro-sprinklers. The method includes: Multiple soil moisture values ​​are obtained from all the soil moisture sensors. When at least one of the soil moisture values ​​is less than a first preset humidity threshold, an irrigation command is generated. Light values ​​are obtained from the light intensity sensor. The irrigation command is sent to the water and fertilizer system. Based on the light intensity value, the water and fertilizer system is controlled to perform irrigation operations on the cultivation ridges corresponding to the soil moisture sensors whose soil moisture values ​​are less than the first preset humidity threshold. When the light value is greater than the preset light threshold, the external shading system is activated. After a preset shading time, the irrigation operation ends, and the air temperature and air humidity values ​​are obtained from the air temperature and humidity sensor. When the air humidity value is greater than or equal to the second preset humidity threshold, the ventilation system is activated; or when the air humidity value is less than the second preset humidity threshold and the air temperature value is greater than the preset temperature threshold, the cooling system is activated. The process of sending the irrigation command to the integrated water and fertilizer system and controlling the integrated water and fertilizer system to perform irrigation operations on the cultivation ridges corresponding to the soil moisture sensors whose soil moisture values ​​are less than the first preset moisture threshold based on the light value includes: when the light value is greater than the preset light threshold, locking the movable sprinkler device and sending the irrigation command to the zone solenoid valve corresponding to the soil moisture sensor whose soil moisture value is less than the first preset moisture threshold, and the zone solenoid valve opening; when the light value is less than or equal to the preset light threshold, locking the ridge drip irrigation device and sending the irrigation command to the walking host, and the walking host driving the spray bar to move on the track.

2. The collaborative control method based on seedling greenhouses according to claim 1, characterized in that, A drip irrigation tape is laid along the center line of the cultivation ridge. The drip irrigation tape is connected to the corresponding zone solenoid valve through branch pipes. The mobile sprinkler irrigation device also includes a fertilizer injection system. The fertilizer injection system includes a storage tank and a fertilizer injection pump. The suction port of the fertilizer injection pump is connected to the storage tank, and the outlet of the fertilizer injection pump is connected to the water supply pipeline of the mobile host. The water supply pipeline is connected to the water supply network of the spray bar and the seedling greenhouse. Based on the light intensity, the integrated water and fertilizer system is controlled to perform irrigation operations on the cultivation ridges corresponding to the soil moisture sensors where the soil moisture value is less than the first preset moisture threshold, including: The cultivation ridge corresponding to the soil moisture sensor whose soil moisture value is less than the first preset moisture threshold is identified as the target irrigation ridge. The irrigation command is sent to the partition solenoid valve corresponding to the target irrigation ridge. Upon receiving the irrigation command, the partition solenoid valve opens, and the main pipeline performs drip irrigation on the target irrigation ridge through the branch pipe, the partition solenoid valve, and the drip irrigation tape. Alternatively, the traveling host receives the irrigation command, moves along the track, supplies power to the fertilizer pump, the storage tank injects fertilizer solution into the water supply pipeline through the fertilizer pump, and the spray bar performs sprinkler irrigation along the track under the drive of the traveling host.

3. The collaborative control method based on seedling greenhouses according to claim 1, characterized in that, The seedling greenhouse is also equipped with an internal insulation system, which includes an internal insulation curtain, an internal insulation drive motor, an internal transmission shaft, multiple bearing seats, a drive arm, an internal push rod, and a limit switch. The internal insulation drive motor is connected to the internal transmission shaft. The bearing seats are installed on the longitudinal tie rods of the seedling greenhouse. The internal transmission shaft is supported by multiple bearing seats. The end of the drive arm is hinged to one end of the internal push rod. The other end of the internal push rod is fixed to the side of the internal insulation curtain. The limit switch is used to detect the extreme positions of the internal insulation curtain when it is retracted or extended. The start control circuit of the movable sprinkler device is connected in series with the limit switch. The central control system is communicatively connected to the limit switch and the internal insulation drive motor. Before sending the irrigation command to the mobile host, the method further includes: The status of the internal insulation system is obtained. When the internal insulation curtain is in the unfolded state, the internal insulation system returns an unfolding signal to the central control system. The central control system controls the internal insulation drive motor to reverse, the internal insulation drive motor drives the internal transmission shaft to reverse, the internal transmission shaft drives the drive arm to swing, the drive arm drives the internal push rod to rotate, and controls the internal insulation curtain to retract. The internal insulation system returns a retracting signal to the central control system. Alternatively, when the inner insulation curtain is in the retracted state, the inner insulation system returns a retracted signal to the central control system, and the central control system interrupts the communication connection with the inner insulation system. The limit switch is manually triggered to control the start of the walking host.

4. The collaborative control method based on seedling greenhouses according to claim 1, characterized in that, The external shading system includes an external truss, guide rails, an external shading drive motor, an external drive shaft, an external rack, an external push rod, and an external shading net. The external truss is located outside the seedling greenhouse. The guide rails are fixed parallel to the external truss. The external shading drive motor is fixed to the guide rails and connected to the external drive shaft via a flexible coupling. The external rack is fixed to the guide rails. Multiple drive gears are fixed at equal intervals on the external drive shaft. The drive gears mesh with the external rack. The drive gears are connected to one end of the external push rod via an external push rod connector. The other end of the external push rod is fixed to the edge of the external shading net via a curtain clip. Activating the external shading system includes: The external sunshade drive motor is controlled to start, and the external sunshade drive motor drives the external transmission shaft and the drive gear to rotate through the flexible coupling; All the drive gears move linearly along the outer rack, and the drive gears drive the outer push rod, the curtain clamp and the outer sunshade net to move on the guide rail through the outer push rod connector, and the outer sunshade net unfolds.

5. The collaborative control method based on seedling greenhouses according to claim 1, characterized in that, The outer surface of the seedling greenhouse is covered with a film. The ventilation system includes a top-rolling film ventilation mechanism and a side-rolling film ventilation mechanism. The top-rolling film ventilation mechanism includes an electric film roller and a top-rolling film rod. The electric film roller is fixed to the gable wall of the seedling greenhouse by a mounting frame. The output end of the electric film roller is connected to the top-rolling film rod through a universal coupling. The top-rolling film rod is set along the ridge of the seedling greenhouse. The side-rolling film ventilation mechanism includes a side-rolling film motor and a side-rolling film rod. The side-rolling film motor is set on the side facade of the seedling greenhouse. The side-rolling film motor is connected to the side-rolling film rod through a transmission mechanism. An insect-proof net is set on the inner side of the side-rolling film rod. Controlling the start of the ventilation system includes: The cooling system sends its status to the central control system. When the cooling system is in the on state, the central control system locks the opening commands of the top roll-up film ventilation mechanism and the side roll-up film ventilation mechanism, and controls the ventilation system to be in the off state. Alternatively, when the cooling system is off, the electric film winder is controlled to rotate forward, and the electric film winder drives the top film winding rod to rotate, winding the rollable portion of the film onto the top film winding rod and opening the top air vent. Alternatively, when the cooling system is off, the side-winding film motor is controlled to rotate forward, and the side-winding film motor drives the side-winding film rod to rotate, winding the rollable portion of the film onto the side-winding film rod, thus opening the side air vent.

6. The collaborative control method based on seedling greenhouses according to claim 1, characterized in that, The cooling system includes a negative pressure fan and a wet curtain device. The negative pressure fan and the wet curtain device are respectively installed on the opposite gable walls of the seedling greenhouse. The wet curtain device includes wet curtain paper, with a water inlet pipe above the wet curtain paper and a water collection tank below it. The water collection tank is equipped with a submersible pump, a water supply valve, and an overflow pipe. The submersible pump forms a circulating water circuit with the water inlet pipe through a water supply pipe. The circulating water circuit is equipped with valves. The central control system is electrically connected to the negative pressure fan and the submersible pump respectively. Controlling the activation of the cooling system includes: An electrical signal is sent to the power controller of the negative pressure fan to start the negative pressure fan, and an electrical signal is sent to the drive circuit of the submersible pump to control the submersible pump to start. The submersible pump transfers the liquid in the water collection tank to the water supply pipe through the water supply pipe, and the water supply pipe wets the wet curtain paper.

7. A collaborative control device based on a seedling greenhouse, characterized in that, It includes at least one control processor and a memory for communicatively connecting to the at least one control processor; the memory stores instructions executable by the at least one control processor, which, when executed by the at least one control processor, enable the at least one control processor to perform the collaborative control method based on a seedling greenhouse as described in any one of claims 1 to 6.

8. An electronic device, characterized in that, Includes the collaborative control device based on the seedling greenhouse as described in claim 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing a computer to perform the collaborative control method based on a seedling greenhouse as described in any one of claims 1 to 6.

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