A temperature control method and system in an algae cultivation pond

Abstract

The present invention relates to the field of data processing, and more specifically, to a temperature control method and system in an algae culture pond, the method comprising: obtaining relevant data of the algae culture pond and drawing a monitoring curve; obtaining the growth state quantity corresponding to each time according to the monitoring curve, and obtaining the growth degree and growth cycle at each time; in response to the decrease in growth degree, the algae is at the end of the growth period, and according to the growth difference at each time, the terminal growth degree of the algae is obtained, and according to the terminal growth degree corresponding to each time, it is determined whether to adjust the temperature control system of the algae culture pond to achieve a suitable growth environment for the algae, and the harvest period of the algae growth is obtained according to the turning point of the cycle corresponding to the terminal growth degree. The present invention promotes the normal growth and reproduction of algae by timely adjusting the temperature to the optimal culture temperature, and ensures that the algae biomass is harvested when it reaches a peak, thereby maximizing the yield and quality.

Description

Technical Field

[0001] The present invention relates to the field of data processing, and more specifically, to a temperature control method and system in an algae culture pond. Background Art

[0002] Temperature control methods and systems in algae culture ponds are essential for the growth and production of algae. Water in the culture pond is pumped to cooling equipment (such as cooling towers or chillers) through a water pump to dissipate heat, and then the cooled water is circulated back to the culture pond. Effectively reduce the water temperature in the culture pond to avoid the adverse effects of high temperature on algae and maintain a suitable growth temperature. Use equipment such as heaters or solar heating panels to supply heat energy to the inside of the culture pond to increase the water temperature. In cold seasons or low temperature environments, keep the water temperature within a suitable range to promote the normal growth and reproduction of algae.

[0003] The existing Chinese patent application document with publication number CN114323162A discloses a method, device and electronic equipment for online monitoring of shell vegetable growth data, which relates to the technical field of plant growth monitoring, including: obtaining ultrasonic related data of the water supply system to be tested obtained by real-time monitoring by an ultrasonic flowmeter arranged in the water supply system to be tested and algae growth data of the water supply system to be tested obtained by real-time monitoring by a laser in-situ particle size analyzer arranged in the water supply system to be tested; using a shell vegetable growth analysis model to perform shell vegetable growth analysis on the ultrasonic related data and the algae growth data to obtain the shell vegetable growth data of the water supply system to be tested.

[0004] In the above scheme, only by monitoring the ultrasonic related data, the analysis of the ultrasonic related data and the algae growth data of the shell vegetable is obtained. At present, due to the photosynthesis of a large number of algae, a large amount of solar energy will be absorbed, thereby lowering the temperature of the water surface and forming a greenhouse effect. Therefore, the temperature of the algae breeding pond will change in real time due to the environment and the biomass in the algae breeding pond. At the same time, the biological characteristics of the algae are not completely consistent and the breeding environment is not completely the same. It is difficult to accurately judge the time and temperature influence of the growth period through a fixed temperature control time. Summary of the invention

[0005] In order to solve the problem that the number of different algae organisms and the environment in the algae cultivation pond affect the growth of the cultivated algae, and it is difficult to control the temperature to achieve the best growth environment, the present invention provides solutions in the following aspects.

[0006] In a first aspect, a temperature control method in an algae culture pond comprises: obtaining relevant data of the algae culture pond and drawing a monitoring curve; obtaining a growth state quantity corresponding to each time according to the monitoring curve, and obtaining a growth degree and a growth cycle at each time according to a change in the amplitude of the growth state quantity at each time; in response to a decrease in the growth degree, the algae is at the end of the growth period, and according to the growth difference at each time, the terminal growth degree of the algae is obtained, and according to the terminal growth degree corresponding to each time, it is determined whether to adjust the temperature control system of the algae culture pond to achieve a suitable growth environment for the algae, and the harvest period of the algae growth is obtained according to the turning point of the cycle corresponding to the terminal growth degree; wherein the terminal growth degree satisfies the following relationship: , where Indicates the negative value at the end of the growth period. The final growth rate of the time period, Indicates the first The time corresponds to the first The growth rate of data, Indicates the first The time corresponds to the first The growth rate of data, Indicates The times correspond to the first The growth degree and The temperature difference corresponding to the growth degree of each data point is: Indicates the number of data points in the window.

[0007] The effect is that by monitoring and analyzing the changes in the growth state of algae, its growth cycle and final growth degree are determined, and the temperature control system of the breeding pond is adjusted accordingly to create a suitable growth environment. In addition, by analyzing the final growth degree and the turning point of the cycle, the harvest period of algae growth can be determined. The effect of this method is that it can accurately control the growth environment of algae and improve breeding efficiency and yield.

[0008] Preferably, obtaining relevant data of the algae culture pond and drawing a monitoring curve includes:

[0009] The relevant data include: temperature data, pH value data, and biomass data, and monitoring curves are drawn with time as the horizontal axis and each relevant data as the vertical axis.

[0010] Preferably, obtaining the growth state quantity corresponding to each time includes:

[0011] The difference between the biomass values ​​at the two moments before and after the target moment is calculated, and the product between the biomass value at the target moment and the difference is calculated, and the ratio between the product and the absolute value of the difference between the temperature at the target moment and the preset optimal temperature is calculated, and the ratio is used as the growth state quantity.

[0012] The effect is that this method can be used to evaluate the growth status of algae, accurately quantify the changes in algae growth rate, and combine with the sensitivity analysis of the impact of temperature factors on growth to help breeders adjust breeding strategies in a timely manner, optimize environmental conditions, improve algae growth efficiency and yield, and ensure the stability and sustainability of the breeding process.

[0013] Preferably, the growth degree at each time is obtained according to the amplitude change of the growth state quantity at each time, including:

[0014] Randomly select any time as the target moment, and establish a window of preset size with the target moment as the center, that is: expand the preset number of time points before and after the target moment, calculate the sum of the changes in the growth state quantity between all adjacent data point pairs in the window, and use the sum of the changes in the growth state quantity as the growth degree of each time in the window.

[0015] The effect is that by establishing a time window around the target moment and calculating the sum of the changes in the growth state within the window, it is possible to fully capture the growth degree of algae and analyze the growth trend of algae, and adjust the breeding conditions in time, thereby effectively improving the growth efficiency of algae and the economic benefits of breeding.

[0016] Preferably, obtaining the growth degree of each time data further includes:

[0017] Randomly select any time as the target moment, and establish a window of preset size with the target moment as the center, that is: expand the preset number of time points before and after the target moment, calculate the sum of the changes in the slope between all adjacent data point pairs in the window, calculate the sum of the changes in the growth state quantity between all adjacent data point pairs in the window, and take the product of the sum of the changes in the slope and the sum of the changes in the growth state quantity as the growth degree of the corresponding time in the window.

[0018] Preferably, obtaining the growth cycle includes:

[0019] Obtain the growth state quantity at each time, obtain the peak value and the valley value based on the monitoring curve, calculate the time interval between adjacent peak values ​​or valley values, and obtain the growth cycle corresponding to each time;

[0020] The growth cycle includes: a start-up period, a growth period, a stable period, a decay period, a death period and a harvest period. In response to a continuous increase in the growth rate, the algae is in the growth period. In response to a decrease or negative growth in the growth rate, the growth environment of the algae is abnormal or the algae is in a transition from a growth period to a stable period. The transition from the growth period to the stable period means that the algae is in the late stage of the growth period and the algae biomass is close to saturation.

[0021] The effect is: by analyzing the growth of algae in different growth cycles, the growth at the end of the growth period in the growth cycle is obtained. Under normal circumstances, the growth will continue to rise, indicating that the algae is in a healthy growth state. By monitoring the negative growth of the growth, this may be a signal of abnormal growth environment of the algae, such as unsuitable temperature, changes in light conditions or other unfavorable factors. Through further analysis of the growth at the end, the breeder can confirm whether the algae is in an abnormal growth environment and take timely measures to adjust it, such as optimizing temperature control or improving light conditions, to ensure that the algae can return to the normal growth trajectory and maintain the stability and efficiency of the breeding process.

[0022] Preferably, judging whether to adjust the temperature control system of the algae culture pond according to the terminal growth degree corresponding to each time includes:

[0023] The growth degree includes a terminal growth degree. When the terminal growth degree is negative, the growth temperature of the algae is abnormal, and the temperature control system of the algae cultivation pond is adjusted according to the preset optimal temperature of the algae.

[0024] Preferably, obtaining the harvest period of algae growth according to the turning point of the cycle corresponding to the final growth degree includes:

[0025] In response to the maximum negative value of the growth degree at the end, the algae is at the turning point from the growth period to the stable period, so the algae in the cultivation pond are harvested, the cultivation environment is updated and the next round of algae growth is carried out.

[0026] The effect is that by monitoring the terminal growth and identifying its maximum negative point, the harvesting time of the algae can be accurately determined, ensuring that the algae biomass is harvested at its peak, thereby maximizing yield and quality.

[0027] In a second aspect, a temperature control system in an algae cultivation pond includes: a processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the above-mentioned temperature control method in the algae cultivation pond is implemented.

[0028] The present invention has the following effects:

[0029] 1. The present invention obtains the growth degree corresponding to each time according to the biomass characteristics of algae growth, adjusts the temperature based on the growth degree and the terminal growth degree, timely checks the working efficiency of the temperature control system of the algae culture pond, and timely adjusts the ambient temperature to the optimal culture temperature, and the water temperature in the culture pond is within an appropriate range, so as to promote the normal growth and reproduction of algae and avoid the negative effects of extreme temperatures on algae, such as growth stagnation or death caused by overheating or overcooling.

[0030] 2. The present invention harvests the algae in the algae culture pond in time at the turning point to avoid the gradual loss of biomass during the stable period, thereby maximizing the yield and quality. Through periodic harvesting and renewal of the culture environment, resource utilization is optimized, ecological balance is maintained, and culture efficiency and adaptability are improved, providing an efficient and sustainable management strategy for algae culture. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0032] Figure 1 It is a method flow chart of steps S1 to S3 in a method for controlling temperature in an algae culture pond according to an embodiment of the present invention.

[0033] Figure 2 It is a schematic diagram of a monitoring curve of biomass data in a temperature control method in an algae culture pond according to an embodiment of the present invention.

[0034] Figure 3 It is a structural block diagram of a temperature control system in an algae culture pond according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] Reference Figure 1 A method for controlling temperature in an algae culture pond includes steps S1 to S3, which are specifically as follows:

[0038] It should be noted that in the algae culture pond, a large amount of algae will absorb a lot of solar energy during photosynthesis, thereby reducing the temperature of the water surface and forming a greenhouse effect. Therefore, the biomass of the algae is calculated by measuring the biomass indicators (such as chlorophyll content, dry weight or wet weight, etc.) in the algae culture solution to obtain the biomass data of the algae culture pond. The culture environment affects the growth rate of the algae, so the temperature of the algae culture pond needs to be monitored and controlled.

[0039] S1: Obtain relevant data of algae cultivation pond and draw monitoring curve.

[0040] The relevant data include: temperature data, pH value data, and biomass data, and monitoring curves are drawn with time as the horizontal axis and each relevant data as the vertical axis.

[0041] It is further stated that the relevant data include but are not limited to the above data, which can be selected according to actual conditions; it is further stated that temperature directly affects the growth rate and final biomass accumulation of algae. Higher temperatures generally help to increase biomass, while lower temperatures may limit growth and lead to a reduction in biomass, so the temperature data of the algae culture pond is collected.

[0042] It should be noted that in the process of algae cultivation, under normal circumstances, the growth of algae will conform to the corresponding growth state of each growth period. Start-up period: algae adapt to the environment and the density increases slowly; growth period: the density increases rapidly, and the growth rate of density gradually increases; stable period: the density is relatively stable and has a tendency to slowly decrease; decline period: the density gradually decreases.

[0043] S2: Obtain the growth state quantity corresponding to each time according to the monitoring curve, and obtain the growth degree and growth cycle at each time according to the amplitude change of the growth state quantity at each time.

[0044] The difference between the biomass values ​​before and after the target time is calculated to obtain the growth state quantity. In addition, the growth state quantity at the corresponding time can be obtained by analyzing the relationship between the biomass value and temperature at each time. The steps are as follows:

[0045] Taking any moment as the target moment, the difference between the biomass values ​​corresponding to the two moments before and after the target moment is calculated, and the product between the biomass value corresponding to the target moment and the difference is calculated, and the ratio of the product to the absolute value of the difference between the temperature at the target moment and the preset optimal temperature is calculated, and the ratio is used as the growth state quantity.

[0046] Specifically, the growth state quantity satisfies the following relationship:

[0047] ;

[0048] In the formula, Indicates The growth state quantity corresponding to the time is Indicates The biomass value corresponding to the time period is Indicates The absolute value of the difference between the temperature corresponding to a time and the optimal temperature, Indicates The biomass value of the adjacent time after the time, Indicates The biomass value of the adjacent time before time, Represents the normalization function.

[0049] In the above method, the growth status quantity is calculated by combining the change of biomass value and the influence of temperature, which can be used to evaluate the growth status of algae at a specific moment. By continuously calculating the growth status quantity at multiple time points, the growth degree (growth rate or growth trend) can be analyzed and the different stages of the growth cycle can be determined. For example, the preset optimal temperature is set to 20°C, and the temperature can be adjusted according to the specific type of algae.

[0050] Obtain the growth state quantity at each time, obtain the peak value and valley value based on the monitoring curve, calculate the time interval between adjacent peak values ​​or valley values, and obtain the growth degree and growth cycle corresponding to each time;

[0051] Randomly select any time as the target moment, and establish a window of preset size with the target moment as the center, that is: expand the preset number of time points before and after the target moment, calculate the sum of the changes in the growth state quantity between all adjacent data point pairs in the window, and take the sum of the changes in the growth state quantity as the growth degree of each time in the window.

[0052] For example, according to the growth state quantity corresponding to each time, taking the target time as an example, a , and then obtain the growth state quantity at each time in the window.

[0053] In addition, in another embodiment, the slope change amount can also be used as an adjustment parameter;

[0054] Randomly select any time as the target moment, and establish a window of preset size with the target moment as the center, that is: expand the preset number of time points before and after the target moment, calculate the sum of the changes in the slope between all adjacent data point pairs in the window, calculate the sum of the changes in the growth state quantity between all adjacent data point pairs in the window, and take the product of the sum of the changes in the slope and the sum of the changes in the growth state quantity as the growth degree of the corresponding time in the window.

[0055] Specifically, the growth degree satisfies the following relationship:

[0056] ;

[0057] In the formula, Indicates The growth degree of the data corresponding to the time period is Indicates The first time window The slope of the line connecting the data and the first data in the window, Indicates The first time window The slope of the line connecting the data and the first data in the window, Indicates The first time window The growth rate of data, Indicates The first time window The growth rate of data, Indicates the number of data points in the window.

[0058] Indicates the time window The data and The difference in the slope of the line connecting the data with the actual point in the window reflects the change rate of biomass value over time. The difference between the growth state quantities at adjacent time points reflects the continuous change of the algae growth condition. By analyzing the changes in the algae growth rate and growth condition within the window, it is easy to capture the local characteristics of the growth dynamics within the window, thereby identifying the turning points or abnormalities of the growth trend.

[0059] Among them, the growth cycle includes: start-up period, growth period, stable period, decay period, death period and harvest period. In response to the continuous growth of growth, the algae is in the growth period. In response to the decrease or negative growth of growth, the growth environment of the algae is not suitable or the algae is in the transition from the growth period to the stable period. Among them, the transition from the growth period to the stable period means that the algae is at the end of the growth period and the algae biomass is close to saturation.

[0060] S3: In response to a decrease in growth rate, the algae is at the end of the growth period. The terminal growth rate of the algae is obtained based on the growth differences at each time. According to the terminal growth rate corresponding to each time, it is determined whether to adjust the temperature control system of the algae cultivation pond to achieve a suitable growth environment for the algae, and the harvest period of the algae growth is obtained according to the turning point of the cycle corresponding to the terminal growth rate.

[0061] Specifically, the final growth rate satisfies the following relationship:

[0062] ,

[0063] In the formula, Indicates the negative value at the end of the growth period. The final growth rate of the time period, Indicates the first The time corresponds to the first The growth rate of data, Indicates the first The time corresponds to the first The growth rate of data, Indicates The times correspond to the first The growth degree and The temperature difference corresponding to the growth degree of each data point is: Indicates the number of data points in the window.

[0064] For example, the temperature difference between the growth degrees at two adjacent times in the window, under normal circumstances, as the biomass gradually approaches the stable period, the decrease in the biomass growth rate gradually becomes obvious. Under normal circumstances, the change range of the previous adjacent time is greater than the change range of the subsequent adjacent time. The smaller the value, the greater the possibility that the growth state at that time will be affected by temperature and become abnormal. The difference reflects the change of growth rate at consecutive time points. A small difference indicates that the growth rate does not change much and the growth state is relatively stable. It indicates the effect of temperature changes on algae growth at adjacent time points. Therefore, if the growth rate is small and the impact of temperature changes is small, the final growth degree will also be smaller, indicating that the algae is at the end of the growth period, which is inconsistent with expectations under normal circumstances. The smaller the final growth degree value, the greater the possibility of abnormalities in algae caused by temperature. Therefore, the temperature of the algae breeding pond is adjusted to reach a suitable temperature.

[0065] Among them, the growth degree includes the terminal growth degree, which is the end of the growth period of the algae. At the end of the growth period, the biomass value of the algae gradually becomes saturated;

[0066] It is further explained that when the algae is at the end of the growth period, although the growth rate of the algae becomes slow, the algae still continues to grow. Under normal circumstances, the final growth degree at the previous moment is greater than that at the next moment. The biomass value of algae growth approaches saturation, which is a normal phenomenon of algae growth. Therefore, only when the final growth degree at the previous moment is less than that at the next moment, it means that the temperature of the algae cultivation pond is abnormal.

[0067] The temperature of the algae cultivation pond at each time when the growth degree and the final growth degree are negative numbers is screened. In response to the negative growth of the growth degree, the temperature is adjusted to the optimal cultivation temperature. In response to the growth degree at the optimal cultivation temperature still being in negative growth, the algae at this moment is at the end of the growth period, and the final growth degree of the growth period is obtained. In response to the final growth degree being a negative value, the algae in the cultivation pond are harvested in time.

[0068] For example, Figure 2 As shown in the figure, the horizontal axis is the cultivation time, the time scale is set in days, and the vertical axis is the cell density. According to the growth rate at each time in the figure, the growth rate of algae at different times can be observed through the monitoring curve. Before and after the time period corresponding to the area marked with the red window in the figure, adjusting the growth environment temperature of the algae to the optimal temperature can promote the rapid growth of algae; it can be seen that the growth rate of algae can be controlled by adjusting the temperature in the middle of the growth period. Between A and B in the figure, the growth rate of algae gradually becomes slow. The algae is at the end of the growth period. Although the growth rate decreases, it is still growing. Under normal circumstances, even if it is adjusted to the optimal growth temperature, it cannot increase the production rate of algae. The reason is that the biomass of algae is close to saturation. Only when the growth degree of the algae at the end of the growth period is negative growth, the temperature is abnormal. Therefore, it is necessary to obtain the maximum value of the negative growth degree of the algae at the end of the growth period, harvest the algae, and reduce the loss of biomass value when the algae enters the stable period, so as to achieve the maximum value of the algae growth degree.

[0069] At this point, the method of the present invention ends here.

[0070] The present invention also provides a temperature control system in an algae culture pond. Figure 3 As shown, the system includes a processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, a method for controlling the temperature in an algae cultivation pond according to the first aspect of the present invention is implemented.

[0071] The system also includes other components familiar to those skilled in the art, such as a communication bus and a communication interface. The configuration and functions of these components are known in the art and will not be described in detail here.

[0072] In the present invention, the aforementioned memory may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, apparatus or device. For example, a computer-readable storage medium may be any appropriate magnetic storage medium or magneto-optical storage medium, such as a resistive random access memory RRAM (Resistive Random Access Memory), a dynamic random access memory DRAM (Dynamic Random Access Memory), a static random access memory SRAM (Static Random-Access Memory), an enhanced dynamic random access memory EDRAM (Enhanced Dynamic Random Access Memory), a high-bandwidth memory HBM (High-Bandwidth Memory), a hybrid memory cube HMC (Hybrid Memory Cube), etc., or any other medium that can be used to store the required information and can be accessed by an application, a module, or both. Any such computer storage medium may be part of a device or accessible or connectable to a device. Any application or module described in the present invention may be implemented using computer-readable / executable instructions that may be stored or otherwise maintained by such a computer-readable medium.

[0073] In the description of this specification, "plurality" or "several" means at least two, such as two, three or more, etc., unless otherwise clearly defined.

[0074] Although this specification has shown and described a number of embodiments of the present invention, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will conceive of many modifications, changes and alternatives without departing from the ideas and spirit of the present invention. It should be understood that in the practice of the present invention, various alternatives to the embodiments of the present invention described herein may be employed.

Claims

1. A method for controlling temperature in an algae culture pond, characterized in that: include: Obtain relevant data of algae cultivation ponds and draw monitoring curves; Obtaining the growth state quantity corresponding to each time according to the monitoring curve, including: calculating the difference between the biomass values ​​corresponding to the two moments before and after the target moment, calculating the product between the biomass value corresponding to the target moment and the difference, calculating the ratio of the product to the absolute value of the difference between the temperature at the target moment and the preset optimal temperature, and taking the ratio as the growth state quantity; Randomly select any time as the target time, and establish a window of preset size with the target time as the center; according to the amplitude change of the growth state quantity at each time, obtain the growth degree and growth cycle at each time; In response to the decrease in growth degree, the algae is at the end of the growth period. According to the growth difference at each time, the end growth degree of the algae is obtained. According to the end growth degree corresponding to each time, it is determined whether to adjust the temperature control system of the algae cultivation pond to achieve a suitable growth environment for the algae, and the harvest period of the algae growth is obtained according to the turning point of the cycle corresponding to the end growth degree; The final growth rate satisfies the following relationship: , where Indicates the negative value at the end of the growth period. The final growth rate of the time period, Indicates the first The time corresponds to the first The growth rate of data, Indicates the first The time corresponds to the first The growth rate of data, Indicates The times correspond to the first The growth degree and The temperature difference corresponding to the growth degree of each data point is: Indicates the number of data points in the window.

2. A method for controlling temperature in an algae culture pond according to claim 1, characterized in that: Obtain relevant data of algae cultivation ponds and draw monitoring curves. include: The relevant data include: temperature data, pH value data, and biomass data, and monitoring curves are drawn with time as the horizontal axis and each relevant data as the vertical axis.

3. The temperature control method in an algae culture pond according to claim 1, characterized in that: Obtaining the growth degree of each time data includes: A preset number of time points are respectively extended before and after the target moment, the sum of the changes in the slopes between all adjacent data point pairs in the window is calculated, the sum of the changes in the growth state quantities between all adjacent data point pairs in the window is calculated, and the product of the sum of the changes in the slopes and the sum of the changes in the growth state quantities is taken as the growth degree at the corresponding time in the window.

4. The temperature control method in an algae culture pond according to claim 1, characterized in that: Obtaining the growth cycle, comprising: Obtain the growth state quantity at each time, obtain the peak value and the valley value based on the monitoring curve, calculate the time interval between adjacent peak values ​​or valley values, and obtain the growth cycle corresponding to each time; The growth cycle includes: a start-up period, a growth period, a stable period, a decay period, a death period and a harvest period. In response to a continuous increase in the growth rate, the algae is in the growth period. In response to a decrease or negative growth in the growth rate, the growth environment of the algae is abnormal or the algae is in a transition from a growth period to a stable period. The transition from the growth period to the stable period means that the algae is in the late stage of the growth period and the algae biomass is close to saturation.

5. The temperature control method in an algae culture pond according to claim 1, characterized in that: According to the corresponding terminal growth degree at each time, it is determined whether to adjust the temperature control system of the algae cultivation pond, including: The growth degree includes a terminal growth degree. When the terminal growth degree is negative, the growth temperature of the algae is abnormal, and the temperature control system of the algae cultivation pond is adjusted according to the preset optimal temperature of the algae.

6. The method for controlling the temperature in an algae culture pond according to claim 1, characterized in that: The harvest period of algae growth is obtained according to the turning point of the cycle corresponding to the final growth degree, including: In response to the maximum negative value of the growth degree at the end, the algae is at the turning point from the growth period to the stable period, so the algae in the cultivation pond are harvested, the cultivation environment is updated and the next round of algae growth is carried out.

7. A temperature control system in an algae cultivation pond, characterized in that: include: A processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the temperature control method in the algae cultivation pond according to any one of claims 1 to 6 is implemented.

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