An automatic feeding device for shellfish larvae and its usage method

Abstract

This invention discloses an automatic feeding device for shellfish larvae, relating to the field of shellfish larvae cultivation. The device corrects the chlorophyll concentration detected by a first detection probe using turbidity sensor data to obtain the actual chlorophyll concentration in the cultivation tank, directly reflecting the concentration of single-celled algae. A second detection probe in the cultivation tank detects the chlorophyll concentration. If the chlorophyll concentration is outside a corresponding threshold range, the controller prohibits the transfer of algae from the cultivation tank to the cultivation tank. If the chlorophyll concentration is within the threshold range, the controller decides whether to transfer algae to the cultivation tank via a delivery system. By correcting the first detection probe's results with turbidity, the device visually displays the amount of feed residue in the cultivation tank, simplifying the detection and feeding process, ensuring the accuracy of the detection results, improving the feeding precision of shellfish larvae, and enhancing the survival rate and stability of large-scale cultivation.

Description

Technical Field

[0001] This invention relates to the field of shellfish larvae cultivation, and in particular to an automatic feeding device for shellfish larvae and its method of use. Background Technology

[0002] Bivalve mollusks (such as oysters, clams, and pearl oysters) are important economic species in my country's marine aquaculture industry. The feeding management during the larval stage directly determines the success or failure of seedling cultivation. Larval feed relies on artificially cultivated live single-celled microalgae (such as golden algae). However, the feeding of this type of feed has long relied on human experience (observing water color and estimating algae quantity), resulting in unstable feeding amounts, which leads to large fluctuations in seedling survival rate and poor stability in large-scale cultivation.

[0003] In the aquaculture of aquatic animals such as fish and shrimp, there are already intelligent control-based feeding devices. However, the design logic of these devices is completely incompatible with the scenario of bivalve larvae rearing. Fish and shrimp fry are large (e.g., newly hatched grouper larvae exceed 1000 micrometers in size) and are fed with dry formulated feed with larger particles (over 100 micrometers). In contrast, bivalve larvae are fed live microalgae in a liquid state. The differences in feed form and fry characteristics between the two are huge, making it impossible to directly apply them to bivalve larvae rearing.

[0004] Current shellfish seedling feeding devices mostly adopt a multi-parameter control mode of "spectrophotometric monitoring of algae culture pond + camera in shellfish rearing pond + image recognition". This mode has the following drawbacks: First, it only monitors the amount of algae in the algae culture pond and indirectly calculates the amount that can be fed, which cannot reflect the actual remaining feed concentration in the larval rearing pond in real time, which can easily lead to feeding delays. Second, the control logic is complex, relying on spectrophotometer detection, image recognition analysis and other multi-parameter coupled calculations, resulting in a long control chain and a complex process.

[0005] In summary, neither manual feeding based on experience nor existing intelligent aquatic feeding devices or general shellfish feeding devices can achieve precise feeding in this scenario. Therefore, a precise feeding solution based on real-time feed concentration feedback is urgently needed. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic feeding device and method for shellfish larvae, in order to solve the problems existing in the prior art, simplify the structure of the automatic feeding device, and improve the accuracy of feeding shellfish larvae.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides an automatic feeding device for shellfish larvae, including a controller. The signal input terminal of the controller is connected to a first detection probe for detecting chlorophyll concentration via a wire. The first detection probe is set in a shellfish larvae rearing tank. A turbidity sensor for detecting turbidity in the rearing tank is also set in the rearing tank. The turbidity sensor is electrically connected to the controller. The signal output terminal of the controller is connected to a conveying system via a wire. The inlet of the conveying system is connected to an algae rearing tank, and the outlet of the conveying system is connected to the rearing tank. A second detection probe for detecting chlorophyll concentration is set in the rearing tank. The second detection probe is electrically connected to the controller. The controller adjusts the chlorophyll concentration transmitted by the first detection probe based on the turbidity signal transmitted by the turbidity sensor and controls the start and stop of the conveying system.

[0008] In one embodiment, the delivery system employs a peristaltic pump.

[0009] In one embodiment, the controller includes a core processing module electrically connected to a first detection probe and a peristaltic pump.

[0010] In one embodiment, the controller further includes a storage module for recording historical data of chlorophyll concentration in the culture tank, the storage module being electrically connected to the core processing module.

[0011] In one embodiment, the controller is housed within a housing, on which a display is mounted, and the display is electrically connected to the core processing module.

[0012] In one embodiment, an audible and visual alarm device is also provided on the outer casing, and the audible and visual alarm device is electrically connected to the core processing module.

[0013] A method of using the above-mentioned automatic feeding device for shellfish larvae includes the following steps: S1: Clean the first detection probe, turbidity sensor and second detection probe, output the data in the storage module through the display and initialize it, select the chlorophyll concentration threshold corresponding to the growth stage of shellfish larvae in the cultivation tank and the chlorophyll concentration threshold corresponding to the growth stage of algae in the cultivation tank. S2: The first detection probe, turbidity sensor and peristaltic pump outlet are placed on the wall of the culture tank, and the second detection probe is placed in the culture tank. S3: The real-time concentration of chlorophyll in the culture tank is detected by the second detection probe; the real-time concentration of chlorophyll in the culture tank is detected by the first detection probe and transmitted to the core processing module; the turbidity sensor transmits the detected turbidity of the culture tank to the core processing module; the core processing module corrects the real-time chlorophyll concentration value according to the turbidity; and the core processing module compares the corrected chlorophyll concentration with the chlorophyll concentration threshold selected in S1. S4: If the real-time chlorophyll concentration detected by the second detection probe is lower than the minimum value of the chlorophyll concentration threshold corresponding to the algal growth stage in the culture tank selected in S1, then stop supplying algae to the culture tank until the chlorophyll concentration in the culture tank recovers to the threshold range. S5: Under the condition of S4, if the real-time concentration of chlorophyll in the cultivation tank is lower than the minimum value of the chlorophyll concentration threshold, start the peristaltic pump to deliver algae feed to the cultivation tank until the chlorophyll concentration in the cultivation tank is greater than the maximum value of the chlorophyll concentration threshold and the peristaltic pump stops working.

[0014] In one embodiment, in step S2, the position of the first detection probe and the position of the peristaltic pump outlet are located on opposite sides of the pool wall.

[0015] In one embodiment, in step S3, the core processing module transmits the real-time chlorophyll concentration detected by the first and second detection probes to the storage module.

[0016] In one embodiment, in step S4, the real-time concentration of chlorophyll in the cultivation tank is detected by the first detection probe, and the actual value of chlorophyll concentration is obtained by correcting the real-time chlorophyll concentration value according to the turbidity. Then, the algae density in the cultivation tank is determined by the actual value of chlorophyll concentration, and the algae density is 2-3 times the larval feeding rate.

[0017] The present invention achieves the following technical effects compared to the prior art: A first detection probe for detecting chlorophyll concentration and a turbidity sensor are installed in the shellfish larvae rearing tank. The first detection probe detects the chlorophyll concentration in the tank in real time, and the turbidity sensor corrects the chlorophyll concentration detected by the first detection probe using the turbidity readings to obtain the actual chlorophyll concentration in the tank. Since the shellfish larvae are fed single-celled algae, the chlorophyll concentration directly reflects the concentration of single-celled algae in the tank. A second detection probe in the tank detects the chlorophyll concentration. The controller compares the chlorophyll concentration detected by the second detection probe with the chlorophyll concentration thresholds for algae at different growth stages in the tank. The controller compares the chlorophyll concentration in the culture tank with the preset chlorophyll concentration threshold. If the chlorophyll concentration in the culture tank is not within the corresponding threshold range, the controller prohibits the transfer of algae from the culture tank to the cultivation tank. If the chlorophyll concentration in the culture tank is within the corresponding threshold range, the controller compares the actual chlorophyll concentration with the preset chlorophyll concentration threshold. If the chlorophyll concentration is lower than the minimum value of the threshold, the controller activates the delivery system set in the algae culture tank. The delivery system delivers the algae cultured in the culture tank to the cultivation tank, replenishing the feed in the cultivation tank in a timely manner to ensure sufficient feed in the cultivation tank until the chlorophyll concentration in the cultivation tank exceeds the minimum value of the threshold but is lower than the maximum value of the threshold. At this point, the controller shuts down the delivery system.

[0018] When using the above-mentioned device to automatically feed shellfish larvae, the first detection probe directly detects the concentration of residual chlorophyll in the shellfish larvae rearing tank and corrects it by turbidity, intuitively displaying the amount of feed residue in the rearing tank, and thus determining whether to add feed to the rearing tank. This simplifies the detection and feeding process, ensures the accuracy of the detection results, improves the feeding precision of shellfish larvae, and improves the survival rate of seedlings and the stability of large-scale cultivation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the automatic feeding device in an embodiment of the present invention; Figure 2 This is a graph showing the correlation between chlorophyll concentration and golden algae concentration in the cultivation pond in an embodiment of the present invention. Figure 3 This is a schematic block diagram illustrating the method of using the automatic feeding device in an embodiment of the present invention; The components include: 1. Cultivation tank; 2. Culture tank; 3. Controller; 4. Peristaltic pump; 5. First detection probe; 6. Second detection probe; and 7. Turbidity sensor. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The purpose of this invention is to provide an automatic feeding device and method for shellfish larvae, in order to solve the problems existing in the prior art, simplify the structure of the automatic feeding device, and improve the accuracy of feeding shellfish larvae.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Please refer to Figures 1 to 3 ; This embodiment provides an automatic feeding device for shellfish larvae. In this embodiment, the shellfish larvae used are those of the Hong Kong oyster (Crassostrea hongkongensis). The density of oyster larvae in the cultivation tank 1 is controlled at 1 larva / ml. Golden algae are used as feed. Under these conditions, the chlorophyll concentration thresholds corresponding to different larval stages and the biomass concentration of the feed are shown in the table below:

[0025] Oyster larvae rearing tank 1 is equipped with a first detection probe 5 and an output terminal of a conveying system. The first detection probe 5 is electrically connected to a controller 3. The input terminal of the conveying system is located in the golden algae cultivation tank 2. Golden algae feed is added to the rearing tank 1 through the conveying system. As the oyster larvae feed, the concentration of golden algae in the rearing tank 1 decreases. Since the first detection probe 5 detects the chlorophyll concentration in the rearing tank 1, and given a fixed water level in the rearing tank 1, the chlorophyll concentration is positively correlated with the concentration of golden algae in the rearing tank 1. For the relationship between chlorophyll concentration and golden algae concentration, please refer to [reference needed]. Figure 2The decrease in golden algae concentration leads to a decrease in chlorophyll concentration in cultivation pond 1. During the cultivation process, as the larvae grow and metabolize their food, dead algal cells and larval feces gradually accumulate in cultivation pond 1, causing increased turbidity and interfering with the accuracy of chlorophyll fluorescence detection. Therefore, a turbidity sensor 7 is also installed in cultivation pond 1. The turbidity sensor 7 detects the turbidity in cultivation pond 1, and the controller 3 corrects the chlorophyll concentration detected by the first detection probe 5 based on the turbidity to obtain the actual chlorophyll concentration in cultivation pond 1. The controller 3 stores the chlorophyll concentration threshold required for feeding oyster larvae at the current stage, and compares the actual chlorophyll concentration with the chlorophyll concentration threshold stored in the controller 3. A second detection probe 6 is installed in the cultivation tank 2 to collect the chlorophyll concentration of golden algae in the cultivation tank. The chlorophyll concentration in cultivation tank 2 is compared with the theoretical chlorophyll concentration threshold for the corresponding growth stage of golden algae stored in the controller 3. If the chlorophyll concentration in cultivation tank 2 is lower than the minimum value of the theoretical chlorophyll concentration threshold for that growth stage, the golden algae controller 3 in cultivation tank 2 issues a command to prohibit the delivery of golden algae to cultivation tank 1 and issues an audible and visual alarm. If the chlorophyll concentration in cultivation tank 2 is within the theoretical chlorophyll concentration threshold range for the corresponding growth stage, the controller 3 compares the actual chlorophyll concentration in cultivation tank 1 with the chlorophyll concentration threshold stored in the controller 3. Based on the comparison result, it decides whether to activate the delivery system to deliver golden algae to cultivation tank 1, so that cultivation tank 1 always has sufficient food to ensure the normal growth of oyster larvae.

[0026] The procedure for determining the turbidity correction factor is provided below.

[0027] The four most typical growth stages of oyster larvae were defined (D-shaped larvae, pre-shell apex larvae, post-shell apex larvae, and creeping larvae / juveniles). The turbidity correction factor α was established by simultaneously measuring water turbidity (NTU method), chlorophyll content, and algal concentration (converted by microscopic counting).

[0028] Correction factor calculation: α = (C 实测 -C 理论 ) / T Among them, C 实测 C represents the measured value of chlorophyll. 理论 T represents the theoretical value of chlorophyll, and T represents turbidity.

[0029] Measurement results: The turbidity correction factor α ranges from 0.02 to 0.22 μg / L / NTU.

[0030] Corrected chlorophyll C 修正 =C 实测-α×T During the larval rearing process, according to the larval growth stage, the corresponding stage is selected on the controller interface, and the system automatically calls the default α value for that stage (e.g., D-shaped larva α=0.02, early shell apex larva α=0.04, late shell apex larva α=0.12, juvenile larva α=0.22). The controller 3 corrects the real-time chlorophyll concentration detected by the first detection probe 5 according to the selected correction coefficient to obtain the actual value of chlorophyll concentration in the rearing tank 1.

[0031] Experimental results show that the turbidity correction coefficient α is positively correlated with the larval development stage and rearing density, and its value range is typically 0.02-0.22 μg / L / NTU. In practical applications, the controller 3 can automatically select the corresponding α value range according to the preset larval growth stage parameters.

[0032] Golden algae are used as feed in a living state, and the golden algae used in oyster larvae cultivation are usually single-celled algae. To avoid damage to the golden algae during the delivery of the system to the cultivation tank 1, a peristaltic pump 4 is used in this embodiment. The peristaltic pump 4 protects the live feed from damage, has high flow control precision, and avoids explosive mortality caused by excessive golden algae in the cultivation tank 1, thereby reducing the survival rate of oyster larvae. Furthermore, after the peristaltic pump 4 stops working, no siphon is generated at the output end of the peristaltic pump 4, preventing oyster larvae and golden algae in the cultivation tank 1 from being sucked back into the golden algae cultivation tank 2 when the peristaltic pump 4 stops working, thus improving the feed delivery precision in the cultivation tank 1 and the survival rate of oyster larvae.

[0033] During the process of peristaltic pump 4 transporting golden algae to cultivation tank 1, it also introduces water from golden algae cultivation tank 2 into oyster larva cultivation tank 1, causing the water level in oyster cultivation tank 1 to rise. Therefore, in this embodiment, a drainage device is also provided in oyster larva cultivation tank 1. The inlet of the drainage device is equipped with a filter device, the filter diameter of which is smaller than the diameter of the golden algae. While peristaltic pump 4 introduces golden algae and water into cultivation tank 1, controller 3 starts the drainage device. The drainage rate of the drainage device is the same as the water inlet rate of cultivation tank 1 through peristaltic pump 4, keeping the water level in cultivation tank 1 constant, thereby ensuring the accuracy of chlorophyll concentration detection by the first detection probe 5.

[0034] The controller 3 includes a core processing module, which includes, but is not limited to, any one of a microcontroller 3 (MCU), a digital signal processor (DSP), or an embedded system chip (SoC). The core processing module is electrically connected to the first detection probe 5 and the peristaltic pump 4. After processing the information transmitted by the first detection probe 5, the core processing module controls the start and stop of the peristaltic pump 4.

[0035] During the cultivation of oyster larvae at the same growth stage, the concentration of golden algae in cultivation pond 1 is maintained within the same threshold range. By detecting the residual chlorophyll concentration in cultivation pond 1, the feeding status of oyster larvae at different time periods can be inferred. The controller 3 includes a storage module for recording historical data of chlorophyll concentration in cultivation pond 1. The storage module is electrically connected to the core processing module. After receiving the chlorophyll concentration signal returned by the first detection probe 5, the core processing module stores it in the storage module. The staff can read the relevant data in the storage module, determine the survival status of oyster larvae, and adjust the cultivation conditions of oyster larvae accordingly to ensure the normal growth of oyster larvae.

[0036] The humidity in the oyster larvae rearing environment is high. To prevent moisture from corroding the controller 3, the controller 3 is placed inside the shell, which is waterproofed to prevent moisture from entering. The shell is also equipped with a display, which is electrically connected to the core processing module. Preferably, the display is a touch screen display. The threshold of chlorophyll concentration in the core processing module can be adjusted through the display to adapt to oyster larvae at different growth stages. At the same time, historical data in the storage module can also be read or initialized through the display.

[0037] The outer shell is also equipped with an audible and visual alarm device, which is electrically connected to the core processing module. When the chlorophyll concentration in the cultivation tank 1 exceeds the preset maximum value and the peristaltic pump 4 cannot be turned off, or when the chlorophyll concentration is lower than the preset minimum value and the peristaltic pump 4 cannot be turned on, the audible and visual alarm device is activated under the control of the core processing module, sending an audible and visual alarm signal to the staff to prevent the chlorophyll concentration in the cultivation tank 1 from being maintained at too high or too low, thus ensuring the normal growth of oyster larvae.

[0038] This embodiment also discloses a method for using the above-mentioned automatic feeding device for shellfish larvae, including the following steps: S1: Since the first detection probe 5, turbidity sensor 7 and second detection probe 6 have been placed in the cultivation tank 1 for a long time, the first detection probe 5, turbidity sensor 7 and second detection probe 6 need to be cleaned before using the automatic feeding device to avoid the surface debris affecting the detection accuracy. The data recorded in the storage module is output and initialized through the display. The chlorophyll concentration threshold corresponding to the growth stage of shellfish larvae in the cultivation tank 1 and the chlorophyll concentration threshold corresponding to the growth stage of algae in the cultivation tank are selected. S2: The outlet of the peristaltic pump 4, the turbidity sensor 7, and the first detection probe 5 are set on the wall of the cultivation tank 1. The first detection probe 5 detects the real-time chlorophyll concentration in the cultivation tank 1, and the turbidity sensor 7 detects the turbidity in the cultivation tank 1. The second detection probe 6 is set on the wall of the cultivation tank 2. The second detection probe 6 is used to detect the chlorophyll concentration of the golden algae in the cultivation tank 2, thereby determining the activity of the golden algae. S3: The real-time concentration of chlorophyll in the culture tank is detected by the second detection probe 6, and the real-time concentration of chlorophyll in culture tank 2 is transmitted to the core processing module; the first detection probe 5 transmits the real-time concentration of chlorophyll in culture tank 1 to the core processing module; the turbidity sensor 7 transmits the turbidity in culture tank 1 to the core processing module. The core processing module corrects the real-time chlorophyll concentration detected by the first detection probe 5 according to the correction coefficient to obtain the actual chlorophyll concentration in culture tank 1. The core processing module compares the actual chlorophyll concentration with the chlorophyll concentration threshold selected in S1. S4: If the real-time chlorophyll concentration detected by the second detection probe 6 is lower than the minimum value of the chlorophyll concentration threshold corresponding to the algal growth stage in the culture tank 2 selected in S1, then the transfer of algae to the culture tank 1 shall be stopped until the chlorophyll concentration in the culture tank 2 recovers to the threshold range. At this time, the conditions for transferring golden algae to the culture tank 1 are met. S5: Under the condition of delivering golden algae to the cultivation tank 1 in S4, if the actual concentration of chlorophyll in the cultivation tank 1 is lower than the minimum value of the chlorophyll concentration threshold, start the peristaltic pump 4 to deliver golden algae feed to the cultivation tank 1 until the chlorophyll concentration in the cultivation tank 1 is greater than the maximum value of the chlorophyll concentration threshold, and then the peristaltic pump 4 stops working.

[0039] Preferably, in step S2, after the golden algae feed is transported to the cultivation tank 1 by the peristaltic pump 4, a large amount of golden algae gathers at the outlet of the peristaltic pump 4. The chlorophyll concentration at the outlet of the peristaltic pump 4 is higher than that at other locations in the cultivation tank 1. To avoid deviation in the chlorophyll concentration detected by the first detection probe 5, the first detection probe 5 and the outlet of the peristaltic pump 4 are respectively set on the opposite side of the tank wall of the cultivation tank 1. This ensures that the first detection probe 5 detects the overall chlorophyll concentration in the cultivation tank 1, thereby improving the accuracy of the detection by the first detection probe 5.

[0040] Preferably, in step S3, after the core processing module corrects the real-time chlorophyll concentration received from the first detection probe 5 to the actual concentration, it then... Figure 3 The correlation between chlorophyll concentration and golden algae concentration was converted into the concentration of golden algae in culture pond 1, and the golden algae concentration was transferred to the storage module for storage, providing a data basis for subsequent research on the growth of shellfish larvae.

[0041] Preferably, in step S4, the concentration of golden algae in the cultivation pond 1 is calculated by the chlorophyll concentration. Since the golden algae used as feed are alive and can swim autonomously, considering the capture efficiency of the shellfish larvae and the survival rate of the feed, the feed density needs to be controlled at 2-3 times the feeding rate of the shellfish larvae.

[0042] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0043] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An automatic feeding device for shellfish larvae, characterized in that, The system includes a controller (3), whose signal input terminal is connected to a first detection probe (5) for detecting chlorophyll concentration via a wire. The first detection probe (5) is installed in a breeding pond (1) for shellfish larvae. The breeding pond (1) is also equipped with a turbidity sensor (7) for detecting turbidity in the breeding pond (1). The turbidity sensor (7) is electrically connected to the controller (3). The signal output terminal of the controller (3) is connected to a conveying system via a wire. The inlet of the conveying system is connected to a breeding pond (2) for algae, and the outlet of the conveying system is connected to the breeding pond (1). The breeding pond (2) is equipped with a second detection probe (6) for detecting chlorophyll concentration. The second detection probe (6) is electrically connected to the controller (3). The controller (3) adjusts the chlorophyll concentration transmitted by the first detection probe (5) through the turbidity signal transmitted by the turbidity sensor (7) and controls the start and stop of the conveying system.

2. The automatic feeding device for shellfish larvae according to claim 1, characterized in that, The conveying system uses a peristaltic pump (4).

3. The automatic feeding device for shellfish larvae according to claim 2, characterized in that, The controller (3) includes a core processing module, which is electrically connected to the first detection probe (5) and the peristaltic pump (4).

4. The automatic feeding device for shellfish larvae according to claim 3, characterized in that, The controller (3) also includes a storage module for recording historical data of chlorophyll concentration in the cultivation pool (1), and the storage module is electrically connected to the core processing module.

5. The automatic feeding device for shellfish larvae according to claim 4, characterized in that, The controller (3) is located inside the housing, and a display is provided on the housing. The display is electrically connected to the core processing module.

6. The automatic feeding device for shellfish larvae according to claim 5, characterized in that, The outer casing is also equipped with an audible and visual alarm device, which is electrically connected to the core processing module.

7. A method of using the automatic feeding device for shellfish larvae as described in claim 6, characterized in that, Includes the following steps: S1: Clean the first detection probe (5), turbidity sensor (7) and second detection probe (6), output the data in the storage module through the display and initialize it, select the chlorophyll concentration threshold in the cultivation pool (1) corresponding to the growth stage of shellfish larvae and the chlorophyll concentration threshold in the cultivation pool (2) corresponding to the growth stage of algae. S2: The outlet of the first detection probe (5), the turbidity sensor (7) and the peristaltic pump (4) are placed on the wall of the cultivation tank (1), and the second detection probe (6) is placed in the cultivation tank (2); S3: The real-time concentration of chlorophyll in the culture tank (2) is detected by the second detection probe (6); the real-time concentration of chlorophyll in the culture tank (1) is detected by the first detection probe (5), and the real-time concentration is transmitted to the core processing module. The turbidity sensor (7) transmits the detected turbidity of the culture tank (1) to the core processing module. The core processing module corrects the real-time chlorophyll concentration value according to the turbidity. The core processing module compares the corrected chlorophyll concentration with the chlorophyll concentration threshold selected in S1. S4: If the real-time chlorophyll concentration detected by the second detection probe (6) is lower than the minimum value of the chlorophyll concentration threshold corresponding to the algal growth stage in the culture tank (2) selected in S1, then stop supplying algae to the culture tank (1) until the chlorophyll concentration in the culture tank (2) recovers to the threshold range. S5: Under the condition of satisfying S4, if the real-time concentration of chlorophyll in the cultivation tank (1) is lower than the minimum value of the chlorophyll concentration threshold, start the peristaltic pump (4) to deliver algae feed to the cultivation tank (1) until the chlorophyll concentration in the cultivation tank (1) is greater than the maximum value of the chlorophyll concentration threshold and the peristaltic pump (4) stops working.

8. The method of using the automatic feeding device for shellfish larvae according to claim 7, characterized in that, In step S2, the position of the first detection probe (5) and the position of the outlet end of the peristaltic pump (4) are respectively located on opposite sides of the pool wall.

9. The method of using the automatic feeding device for shellfish larvae according to claim 7, characterized in that, In step S3, the core processing module transmits the real-time concentration of chlorophyll detected by the first detection probe (5) and the second detection probe (6) to the storage module.

10. The method of using the automatic feeding device for shellfish larvae according to claim 7, characterized in that, In step S4, the real-time concentration of chlorophyll in the cultivation pond (1) is detected by the first detection probe (5), and the actual value of chlorophyll concentration is obtained by correcting the real-time chlorophyll concentration value according to the turbidity. Then, the algae density in the cultivation pond (1) is determined by the actual value of chlorophyll concentration. The algae density is 2-3 times the larval feeding rate.

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