Control system for electric heating film heating in sunlight greenhouse overwintering production

Abstract

The application discloses a sunlight greenhouse overwintering production electric heating film heating control system and relates to the technical field of greenhouse environment control. A crop distribution monitoring module is used for collecting the position distribution of crops in a greenhouse and determining the temperature required by different crops for growth. A region division module divides the interior of the greenhouse into different regions in a matrix region mode according to the shape and area of the greenhouse. A data acquisition module acquires and pre-processes first environment information after the region division module divides the interior of the greenhouse into different regions, wherein the first environment information at least includes room temperature data. After power regulation is completed, the data monitoring module continues to monitor the room temperature of each region, so as to determine whether to control the self-adaptive auxiliary module to start working, to cool down the region with a high temperature and to heat up the region with a low temperature, so that the crops are in a suitable growth temperature.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of greenhouse environment control, more specifically, to a sunlight greenhouse overwintering production electric heating film heating control system. BACKGROUND

[0002] Sunlight greenhouse overwintering production refers to the cultivation and production of crops such as vegetables in winter using sunlight greenhouses to ensure the production of fresh vegetables in cold seasons. Sunlight greenhouses make full use of solar energy to maintain indoor temperature without or with less heating, allowing crops to safely overwinter and produce;

[0003] In greenhouse cultivation, due to differences in soil location and sunlight receiving angle, the temperature inside the greenhouse is unevenly distributed. This unevenness of temperature distribution has a negative impact on crop growth, for example, in areas with lower temperatures, crops grow slowly and are susceptible to pests and diseases; while in areas with higher temperatures, crops may be damaged due to excessive water evaporation and physiological metabolic disorder. Traditional greenhouse temperature control methods often only focus on adjusting the overall greenhouse temperature, and fail to effectively address the temperature unevenness caused by location differences.

[0004] Therefore, there is an urgent need for a system that can accurately regulate the temperature distribution in the greenhouse to improve this unevenness and provide a more uniform growing environment for crops. SUMMARY

[0005] To solve the above problems, the present application provides a sunlight greenhouse overwintering production electric heating film heating control system.

[0006] The present application provides a sunlight greenhouse overwintering production electric heating film heating control system, comprising:

[0007] A crop distribution monitoring module for collecting the location distribution of crops in the greenhouse and determining the temperature required for the growth of different crops;

[0008] A region division module that divides the interior of the greenhouse into different regions in a matrix region manner according to the shape and area of the greenhouse;

[0009] A data acquisition module that collects and pre-processes first environmental information after the region division module divides the interior of the greenhouse into different regions, the first environmental information including at least room temperature data;

[0010] A data analysis and decision module that receives the first environmental information from the data acquisition module, processes the temperature data based on a temperature uniformity model, determines the regions that need to be regulated and the regulation range, and obtains the heating power adjustment amount required for each region's electric heating film;

[0011] The regulation execution module receives the instruction sent by the data analysis decision module and precisely regulates the power of the electrothermal film in each area.

[0012] The adaptive auxiliary module assists in increasing the temperature in the area with low temperature and assisting in reducing the temperature in the area with high temperature after the regulation execution module executes the regulation instruction.

[0013] The man-machine interaction module is used to show the relevant data to the user.

[0014] Preferably, the temperature data is processed based on the temperature uniformity model, and the specific steps are as follows:

[0015] The temperature of each collection point in each area is collected.

[0016] The average temperature of all collection points in all areas is calculated as the reference temperature.

[0017] For each collection point i, the difference between the current collection point temperature and the reference temperature is calculated.

[0018] The temperature difference threshold is set in advance.

[0019] If , a first result is generated, and a first operation is performed.

[0020] Preferably, the generation of the first result and the performance of the first operation are as follows:

[0021] It is determined that the area where the collection point is located is a regulation area.

[0022] The required heating power adjustment amount of the electrothermal film in the area is calculated in combination with the current temperature deviation .

[0023] Preferably, the adaptive auxiliary module includes a ventilation module, and the specific working process is as follows:

[0024] A temperature coefficient is determined (when 0).

[0025] A ventilation correction coefficient is calculated.

[0026] The initial ventilation amount of the ventilation module is determined according to .

[0027] The actual ventilation amount is calculated.

[0028] The actual ventilation amount is calculated. ​​​​​The length of ventilation is obtained.

[0029] Preferably, the temperature coefficient is determined by the following steps:

[0030] The current sunlight intensity is determined.

[0031] The temperature coefficient is obtained by an empirical formula.

[0032] Preferably, the adaptive auxiliary module further comprises a sunshade module, and the specific working process is as follows:

[0033] The sunshade area is calculated.

[0034] The sunshade length is calculated.

[0035] The sunshade area ratio is adjusted in real time.

[0036] Preferably, the adaptive auxiliary module further comprises a heating compensation module, and the specific working process is as follows:

[0037] The temperature deviation is set as (when 0).

[0038] The heating power adjustment amount is obtained according to the formula.

[0039]

[0040] Wherein, T is a preset time period parameter for controlling the period of the sine function, T is the set temperature, T is the current temperature, P is the basic heating power, and t is the heating duration.

[0041] The power upper limit is set. , or , and an alarm is triggered at the same time.

[0042] Preferably, the ventilation correction coefficient is calculated by the following steps:

[0043] The humidity H of the air in the greenhouse is determined.

[0044] The current outdoor wind speed is determined.

[0045] The ventilation correction coefficient is obtained according to the formula.

[0046] ​​​​​​​​​​​​​​​​​Preferably, the precise regulation of the power of the electrothermal film of each region comprises:

[0047] Reordering the positions of the crops in each region according to the required temperature of the crops;

[0048] Adjusting the crops with the maximum required temperature of the crops in each region to the middle position of the sequence as the midpoint region;

[0049] Ordering the positions of the crops from the starting point to the midpoint according to the increasing required temperature of the crops;

[0050] Ordering the positions of the crops from the midpoint to the endpoint according to the decreasing required temperature of the crops;

[0051] Based on the above reordering of the positions of the crops.

[0052] Preferably, the human-computer interaction module is used to display relevant data to the user, specifically including:

[0053] The user sets the target temperature, the temperature allowable deviation range, and the real-time temperature data of each region, and the working state of the electrothermal film is displayed to the user through the human-computer interaction module.

[0054] Beneficial effects: After the power regulation is completed, the data monitoring module continues to monitor the room temperature of each region, so as to determine whether to control the adaptive auxiliary module to start working to cool the area with a higher temperature and to heat the area with a lower temperature, so that the crops are in a suitable growth temperature, and through such a cycle of monitoring and regulation, the greenhouse can maintain a relatively uniform temperature distribution in different seasons and different time periods, and create a good thermal environment for crop growth. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 is a flowchart of the management system of the present application. DETAILED DESCRIPTION

[0056] Application scenario: In greenhouse cultivation, due to the difference in soil position and sunlight receiving angle, the temperature inside the greenhouse is distributed unevenly, and this unevenness of temperature distribution has a negative impact on crop growth, for example, in areas with lower temperature, crops grow slowly and are easily attacked by pests and diseases; while in areas with higher temperature, crops may be damaged due to excessive water evaporation and physiological metabolic disorder. Traditional greenhouse temperature control methods often only focus on the temperature regulation of the whole greenhouse, and cannot effectively solve the problem of uneven temperature caused by position difference.

[0057] As shown in Figure 1 : a sunlight greenhouse overwintering production electrothermal film heating control system, comprising:

[0058] The crop distribution monitoring module is configured to collect the position distribution of the crops in the greenhouse and determine the temperature required for the growth of different crops.

[0059] It should be noted that the crops are placed in the predefined areas, and the temperature required for the growth of each crop is known, for example, there are four varieties of crops, and crops of the same variety are placed in the same area, and the growth temperature required for different varieties can be obtained in advance.

[0060] The area division module divides the interior of the greenhouse into different areas in a matrix area manner according to the shape and area of the greenhouse.

[0061] For example, the area division module reasonably divides the areas in a matrix area manner according to the shape and area of the greenhouse, and lays the electric heating film, and each area is provided with a temperature sensor to monitor the temperature in real time. The electric heating film is made of high-thermal-conductivity and aging-resistant material, which ensures uniform heating and long service life.

[0062] It should be noted that the interior of the greenhouse is divided into a shape similar to a chessboard, and different types of crops are placed in the corresponding areas, so that when it is necessary to increase the area or the functional area, the original basis can be added conveniently, and the overall layout will not be disturbed too much.

[0063] The data acquisition module acquires and pre-processes first environment information after the area division module divides the interior of the greenhouse into different areas, and the first environment information at least includes room temperature data.

[0064] It should be noted that the data acquisition module is connected with the temperature sensor of each area, and is configured to acquire the room temperature data in real time and transmit the data to the data analysis and decision module for analysis and processing. The module has a data preprocessing function such as filtering and amplification, which improves the accuracy of the data.

[0065] The data analysis and decision module receives the first environment information transmitted by the data acquisition module, processes the temperature data based on a temperature uniformity model, determines the area to be controlled and the control range, and obtains the heating power adjustment amount required for the electric heating film of each area.

[0066] It should be noted that after obtaining the collected temperature data, the heating power adjustment amount of the electric heating film of each area is calculated by comparing the preset temperature standard value with the real-time temperature of the area, so as to realize uniform control.

[0067] The control execution module receives the instruction sent by the data analysis and decision module and accurately controls the power of the electric heating film of each area.

[0068] It should be noted that the power of the electrothermal film is precisely adjusted by using power electronic technology such as silicon-controlled voltage regulation to realize continuous and smooth adjustment from 0 to rated power.

[0069] The adaptive auxiliary module assists in increasing the temperature for the region with low temperature and assisting in reducing the temperature for the region with high temperature after the regulation and control execution module completes the execution of the regulation and control instruction.

[0070] It should be noted that after the power regulation is completed, the data monitoring module continues to monitor the room temperature of each region, so as to determine whether to control the adaptive auxiliary module to start working to reduce the temperature of the region with high temperature and to increase the temperature of the region with low temperature, so that the crops are in a suitable growth temperature.

[0071] The man-machine interaction module is used to show relevant data to the user.

[0072] It should be understood that first, in the planning and construction stage of the greenhouse, the installation position of the temperature sensor is reasonably determined according to the shape, size and cultivation layout of the greenhouse, so as to ensure that the temperature conditions of different regions of the greenhouse can be comprehensively and accurately reflected; after the system is started, the data acquisition module continuously works, and the data analysis and decision module continuously analyzes data and commands the regulation and control execution module to act;

[0073] For example, in winter, when the sun shines in the morning, the east cultivation bed may heat up quickly, and it is difficult to reduce the temperature to a suitable temperature by adjusting the power of the electrothermal film, so the data analysis and decision module starts the adaptive auxiliary module to appropriately assist in ventilation and cooling;

[0074] And when the west side is insufficiently illuminated and the temperature is low, and it is difficult to increase the temperature to a suitable temperature by adjusting the power of the electrothermal film, the adaptive auxiliary module of the west side is started to slowly increase the temperature; through such cyclic monitoring and regulation, the greenhouse can maintain a relatively uniform temperature distribution in different seasons and different time periods, and create a good thermal environment for crop growth.

[0075] As a further embodiment, the temperature data is processed based on a temperature uniformity model, and the specific steps are as follows:

[0076] The temperature of each region collection point is collected;

[0077] The average temperature of all region collection points is calculated as a reference temperature ;

[0078] For each collection point i, the difference between the current collection point temperature and the reference temperature is calculated ;

[0079] A temperature difference threshold is preset ;

[0080] If If the first result is true, a first operation is performed.

[0081] It should be understood that, assuming we have a large crop greenhouse, which is divided into four areas A, B, C, D, each area is installed with an electric heating film for heating;

[0082] First of all, the preset temperature standard value, such as setting the temperature suitable for the growth of crops in the entire greenhouse is 20 degrees Celsius; each area is installed with a temperature sensor to collect real-time temperature data;

[0083] Suppose, in the initial state, the real-time temperature of area A is 18 degrees Celsius, area B is 20 degrees Celsius, area C is 19 degrees Celsius, and area D is 21 degrees Celsius;

[0084] The intelligent algorithm will compare and analyze these real-time temperature data with the preset 20 degrees Celsius standard value;

[0085] For area A, the temperature is 2 degrees Celsius lower than the standard value; the intelligent algorithm will determine the heating power adjustment amount that needs to be increased according to its own calculation rules;

[0086] For example, the intelligent algorithm calculates that every 1 degree Celsius needs to increase 100 watts of power to quickly raise the temperature, so area A needs to increase 200 watts of power;

[0087] The temperature of area B is exactly the standard value, so the algorithm calculates that the electric heating film heating power of this area does not need to be adjusted, and can remain in the existing state;

[0088] The temperature of area C is 1 degree Celsius lower than the standard value, and according to the algorithm rules, it may need to increase 100 watts of power;

[0089] The temperature of area D is 1 degree Celsius higher than the standard value, and the algorithm may calculate that it needs to reduce a certain power to lower the temperature, such as reducing 80 watts of power, so that the temperature gradually decreases to the standard value.

[0090] By calculating the heating power adjustment amount required by the electric heating film for each area respectively in this way, and implementing the corresponding adjustment, the temperature distribution uniformity control goal of the entire greenhouse is finally achieved, so that the temperature of each area is close to 20 degrees Celsius, providing a suitable growth environment for crops.

[0091] As a further embodiment, the generating a first result and performing a first operation is specifically:

[0092] Determine that the area where the collection point is located is a control area;

[0093] Calculate the heating power adjustment amount required by the electric heating film in the area in combination with the current temperature deviation ) size.

[0094] It should be noted that, for example, the intelligent algorithm stipulates that for every 1°C temperature deviation, the electric heating film power needs to be adjusted by a certain wattage, so that the specific power adjustment amount can be calculated based on this proportional relationship and set in advance for calculation.

[0095] As a further embodiment, the adaptive auxiliary module includes a ventilation module, and the specific working process is as follows:

[0096] Determine a temperature coefficient (when 0:00);

[0097] Calculate the ventilation correction factor ;

[0098] in accordance with Determine the initial ventilation volume of the ventilation module ;

[0099] It should be noted that, for example, The value of the initial ventilation rate is determined by :

[0100] like At 3-5 degrees, set ;

[0101] like At 5-8 degrees, set ;

[0102] like At 8 degrees, .

[0103] Calculate actual ventilation volume ;

[0104] It should be noted that according to the formula Calculated.

[0105] By formula Get the ventilation time; it should be noted that 0.05 is the empirical heat dissipation efficiency coefficient.

[0106] It should be understood that after the power of the electric heating film is adjusted, the temperature situation continues to be monitored. If the temperature has not dropped to the expected level, the adaptive auxiliary module needs to intervene to assist in cooling the temperature.

[0107] As a further embodiment, the temperature coefficient is determined The specific steps are:

[0108] Determine the current sunlight intensity ; The unit is lux, and the value range is 0-10000.

[0109] By empirical formula is derived. Wherein, 0.01 is a parameter, which determines the degree of influence on the temperature coefficient , 0.2 is a fixed adder, and when equals 0, the value is 0.2.

[0110] As a further embodiment, the adaptive auxiliary module further comprises a sunshade module, and the specific working process is as follows:

[0111] Calculate the sunshade area ; it should be noted that the formula is used to calculate.

[0112] Calculate the sunshade duration ; it should be noted that the formula is used to calculate, and 0.02 is the sunshade cooling efficiency coefficient.

[0113] Adjust the sunshade area ratio in real time. It should be noted that during the sunshade process, the sunshade area ratio is adjusted in real time according to the temperature change. If the temperature drop rate exceeds a certain value (such as 0.5 degrees per minute), the sunshade area is appropriately reduced, and vice versa.

[0114] It should be further noted that the calculation of the sunshade area can help determine the size of the initial sunshade range. Thus, it is determined how large an area needs to be shaded during sunshade, so as to reasonably deploy sunshade facilities and effectively block the sunlight from shining on the target area;

[0115] Secondly, the calculation of the sunshade duration combined with the sunshade cooling efficiency coefficient (0.02) can estimate how much the temperature can be reduced by the sunshade measures. For example, by calculating the duration and the known coefficient, it can be roughly estimated how much the temperature will be reduced after a period of sunshade, so as to make corresponding arrangements in advance. Moreover, when adjusting the sunshade area ratio in real time according to the temperature change, the basic data of the sunshade duration and area can also provide a reference for adjustment, ensuring that the sunshade measures can flexibly and effectively respond to temperature changes;

[0116] Specifically, when the sunshade module is applied for sunshade.

[0117] As a further embodiment, the adaptive auxiliary module further comprises a heating compensation module, and the specific working process is as follows:

[0118] Set as the temperature deviation (when 0);

[0119] According to the formula ;

[0120] the adjustment amount for the required heating power;

[0121] wherein, is a preset time period parameter for controlling the period of the sinusoidal function, is the set temperature, is the current temperature, is the base heating power, and t is the heating duration;

[0122] setting a power upper limit when or a warning is triggered at the same time.

[0123] It should be understood that after the power regulation of the electrothermal film, the temperature situation is continuously monitored, and if the temperature has not risen to the expected value, the adaptive auxiliary module needs to intervene to assist in temperature rise.

[0124] It should be understood that during the heating process, the current temperature is updated every certain time interval and the heating power is recalculated until the stop condition is met: the temperature is detected less than or equal to the preset stop threshold for n consecutive times (n is a preset number of times), the heating is stopped and the temperature monitoring state is entered, and if the temperature exceeds the range again, the algorithm is restarted. It should be further explained that,

[0125] partially embodies the dynamic response to temperature deviation. It adjusts the heating power according to the size of temperature deviation, and when the temperature deviation is greater, this part of the heating power is more obvious; for example, when the temperature deviation is large, the value of this part will be closer to 2, so that the heating power will have a large increase on the basis of the base power to quickly make up for the temperature difference. This

[0126] part considers the difference between the set temperature and the current temperature ; this difference affects the heating power through a form similar to a logistic function, and when the set temperature and the current temperature differ greatly, this part will increase the heating power. It simulates the demand for heating due to environmental heat dissipation and other factors. This design can more accurately adjust the heating power according to the actual temperature difference, rather than simply determining whether the temperature is below a certain threshold. Finally,

[0127] ​The time period factor is introduced. During the heating process, the heating power will be periodically adjusted with time. This fluctuation can simulate some natural fluctuation of the device during the long heating process, or better adapt to the thermal inertia of the heated object and other factors. For example, for some materials with thermal lag characteristics, this periodic adjustment may help to heat more evenly.

[0128] Specifically, the entire formula realizes the comprehensive adaptive adjustment of the heating power by multiplying the three factors. As the heating process proceeds, the temperature deviation will gradually decrease, the relationship between the ambient temperature and the heated object changes, and the time period factor continues to work. This comprehensive adaptive mechanism can make the heating power dynamically change according to the actual heating situation, which helps to avoid the situation of excessive or insufficient heating that may occur in the traditional heating method.

[0129] Furthermore, each adjustment part of each factor is reasonably limited. For example, the numerator and denominator of the temperature deviation factor part are designed so that this part will not appear a large value, which helps to avoid the situation that the heating power increases unlimitedly due to the excessive temperature deviation. Similarly, the function form of the ambient temperature factor part also has an asymptote, which will not make the heating power increase unlimitedly due to the excessive temperature difference. This design helps to maintain the stability and safety of the heating system in various complex heating environments.

[0130] As a further embodiment, the calculating the ventilation correction coefficient Specifically:

[0131] determining the humidity H of the air inside the greenhouse; wherein the value range is 0% to 100%, obtained by measuring with a hygrometer;

[0132] determining the current outdoor wind speed ; wherein the unit is meters per second, and the value range is 0 to 20.

[0133] According to the formula ventilation correction coefficient is obtained.

[0134] As a further embodiment, the precise regulation of the power of the electrothermal film in each area includes:

[0135] reordering the positions of the crops according to the required temperature of the crops in each area;

[0136] adjusting the crops with the maximum required temperature of the crops in each area to the middle position in the sequence as the midpoint area;

[0137] The required temperature of the crops from the starting point to the midpoint is sequentially increased to sort the positions of the crops;

[0138] The required temperature of the crops from the midpoint to the endpoint is sequentially reduced to sort the positions of the crops;

[0139] The positions of the crops are sorted again based on the above.

[0140] It should be understood that by re-sorting the areas of the crops in the greenhouse, it is beneficial to avoid the influence of the too large difference in required temperature between different crops on growth, for example, there are five areas A, B, C, D, and E, and the corresponding required temperatures are 18, 16, 25, 21, and 22 degrees respectively. If the previous division is followed, the arrangement order may be ABCDE. At this time, the adjacent crops are not sorted according to the minimum temperature difference, so the temperature influence on the adjacent crops is large, such as the difference between B and C is 9 degrees. Therefore, whether it is subsequent temperature reduction or temperature increase, it may affect the growth of the adjacent crops.

[0141] Therefore, based on this situation, we need to re-sort. According to the new sorting method, we take 25 degrees as the middle value, and the final sorting order is BACED. The required temperature difference of the crops after re-sorting is the smallest. At this time, after the temperature reduction or temperature increase operation, the required growth temperature of the adjacent crops is the smallest. Therefore, it is beneficial to avoid the situation that the temperature difference is too large and affects the growth of the crops.

[0142] It should be further pointed out that the crops in the greenhouse are planted in mobile pots.

[0143] As a further embodiment, the human-computer interaction module is used to show the user relevant data, specifically including:

[0144] The user sets the target temperature and the temperature allowable deviation range through the human-computer interaction module, and shows the user the real-time temperature data of each area and the working state of the electrothermal film.

[0145] It should be pointed out that the human-computer interaction module can be used by the operator to set the target temperature, deviation range and other parameters, and to view the real-time temperature and electrothermal film state of the area. The interface is simple and intuitive, and is convenient for operation and monitoring.

[0146] Working principle

[0147] Firstly in the planning and construction stage of the greenhouse, the installation position of the temperature sensor is determined according to the shape, size and cultivation layout of the greenhouse, so as to ensure that the temperature conditions of different areas of the greenhouse can be comprehensively and accurately reflected; after the system is started, the data acquisition module continuously works, the data analysis and decision module continuously analyzes the data and commands the action of the control execution module; for example, in winter morning, the east side cultivation bed may heat up faster under sunlight, and it is difficult to reduce to the appropriate temperature by adjusting the power of the electric heating film, so the data analysis and decision module starts the adaptive auxiliary module to appropriately assist ventilation and cooling; while the west side is insufficiently light and the temperature is low, and it is difficult to heat up to the appropriate temperature by adjusting the power of the electric heating film, so the adaptive auxiliary module of the west side is started to slowly heat up; through such cyclic monitoring and control, the greenhouse can maintain a relatively uniform temperature distribution in different seasons and different time periods, and create a good thermal environment for crop growth.

[0148] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall be considered as falling within the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. Solar greenhouse wintering production electric heating film heating control system, characterized by: include: The crop distribution monitoring module is used to collect the location distribution of crops in the greenhouse and determine the temperature required for the growth of different crops; The area division module divides the greenhouse into different areas in a matrix manner according to the shape and area of ​​the greenhouse; a data acquisition module, which collects and pre-processes first environmental information after the area division module divides the interior of the greenhouse into different areas, wherein the first environmental information includes at least room temperature data; a data analysis and decision module, which receives the first environmental information transmitted by the data acquisition module, processes the temperature data based on the temperature uniformity model, determines the area that needs to be regulated and the regulation range, and obtains the heating power adjustment required for the electric heating film in each area; A control execution module receives instructions sent by the data analysis and decision module and accurately controls the power of the electric heating film in each area; An adaptive auxiliary module, after the control execution module completes the execution of the control instruction, assists in raising the temperature in the low temperature area and assists in lowering the temperature in the high temperature area; Human-computer interaction module, used to display relevant data to users; The temperature data is processed based on the temperature uniformity model, and the specific steps are as follows: Collect the temperature of each area's collection point; Calculate the average temperature of all regional collection points as the reference temperature ; For each sampling point i, calculate the difference between the current sampling point temperature and the reference temperature ; Pre-set temperature difference threshold ; like , then generate a first result and perform a first operation; The generating of the first result and performing the first operation specifically includes: Determine that the area where the collection point is located is a control area; Combined with the current temperature deviation ( ) size to calculate the required heating power adjustment amount of the electric heating film in this area; The adaptive auxiliary module also includes a heating compensation module, and the specific working process is as follows: set up is the temperature deviation (when 0:00); According to the formula ; is the required heating power adjustment amount; in, Is a preset time period parameter used to control the period of the sine function. To set the temperature, is the current temperature, is the basic heating power, t is the heating duration; Setting a power cap ,when ,or When the alarm is triggered, The precise control of the electric heating film power in each area includes: Re-order the locations of crops based on the temperature they require within each area; The crops with the highest temperature requirements in each area are adjusted to the middle of the sequence as the midpoint area; The crop positions are sorted by increasing the required temperature of the crops from the starting point to the midpoint; The crop positions are sorted in descending order from the midpoint to the end point in terms of the temperature required for the crops; Based on the above, the crop positions are sorted again.

2. The solar greenhouse overwintering production electric heating film heating control system according to claim 1 is characterized in that: The adaptive auxiliary module includes a ventilation module, and the specific working process is as follows: Determine a temperature coefficient (when 0:00); Calculate the ventilation correction factor ; in accordance with Determine the initial ventilation volume of the ventilation module ; Calculate actual ventilation volume ; According to the formula , calculated; By formula Get ventilation time.

3. The solar greenhouse wintering production electric heating film heating control system according to claim 2 is characterized in that: The temperature coefficient is determined The specific steps are: Determine the current sunlight intensity ; Through empirical formula Come to.

4. The solar greenhouse wintering production electric heating film heating control system according to claim 3 is characterized in that: The adaptive auxiliary module also includes a sunshade module, and the specific working process is as follows: Calculate the shade area ; Calculate shading duration ; Get the temperature drop in the greenhouse during the current shading time in real time; Adjust the shading area in real time according to the temperature drop in the greenhouse.

5. The solar greenhouse overwintering production electric heating film heating control system according to claim 2 is characterized in that: The calculated ventilation correction factor Specifically: Determine the air humidity H inside the greenhouse; Determine the current outdoor wind speed ; According to the formula Derive the ventilation correction factor.

6. The solar greenhouse overwintering production electric heating film heating control system according to claim 1 is characterized in that: The human-computer interaction module is used to display relevant data to the user, specifically including: The user sets the target temperature and the allowable temperature deviation range through the human-computer interaction module, and displays the real-time temperature data of each area and the working status of the electric heating film to the user.

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