Acoustic fish luring system and method for fish schools in deep and far sea culture environment

Abstract

The invention discloses an acoustic fish luring system and method for a fish school in a deep sea culture environment, and relates to the technical field of fish culture, and the method comprises the steps: collecting a natural predation signal of the fish school through a hydrophone, and transmitting the natural predation signal to a data processing and control center; the data processing and control center receives the natural predation signal, obtains a waveform and a frequency according to the natural predation signal, sends a control instruction and parameter setting to the signal generator according to the waveform and the frequency, receives the control instruction and the parameter setting at the signal generator, and generates a first electric signal based on the control instruction and the parameter setting; sending the first electric signal to a power amplification device, then amplifying the first electric signal through the power amplification device to obtain a second electric signal, sending the second electric signal to a water energy sound conversion device, finally converting the second electric signal into a fish gathering signal through the water energy sound conversion device, and outputting the fish gathering signal. Collected fish stock natural predation signals are converted into fish gathering signals, and therefore the fish gathering and catching efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of fish farming, and in particular to an acoustic fish attracting system and method for fish schools in a deep-sea farming environment. Background Art

[0002] With the increasing shortage of marine fishery resources, deep-sea aquaculture technology has gradually become an important direction to ensure the supply of aquatic products. However, in deep-sea aquaculture environments, the collection and capture of fish schools faces many challenges, such as the vast aquaculture area, uneven distribution of fish schools, and low fishing efficiency. Although traditional mechanical induction and optical attraction methods have improved the collection and capture efficiency to a certain extent, they both have obvious limitations, such as complex equipment, susceptibility to environmental interference, and limited scope of application.

[0003] At present, the methods of attracting fish mainly include mechanical induction method and optical attraction method. The mechanical induction method can achieve directional guidance of fish schools through physical structure design, but its efficiency is highly dependent on the accuracy and stability of mechanical components, and it is difficult to flexibly respond to sudden changes in the behavior of fish schools; the optical attraction method can utilize the sensitivity of fish to specific light and attract fish schools by designing and optimizing light sources. However, the optical attraction method can overcome the limitations of lighting conditions to a certain extent, but its effect is still affected by natural factors such as water clarity, weather changes and ocean currents. In turbid waters or severe weather conditions, the propagation and attraction effects of light will be greatly reduced.

[0004] As a non-contact, highly penetrating and wide-coverage information transmission method, acoustic signals have shown great potential in regulating the behavior of marine organisms. However, the acoustic fish luring method for fish schools in deep-sea aquaculture environments is still in its infancy and has not yet formed a mature technical system. Therefore, how to design an acoustic fish luring system that can respond to the dynamic changes of fish schools in real time and accurately is a problem that needs to be solved urgently.

[0005] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0006] The main purpose of this application is to provide an acoustic fish attracting system and method for fish schools in a deep-sea aquaculture environment, aiming to solve the technical problem of how to design an acoustic fish attracting system that can respond to the dynamic changes of fish schools in real time and accurately.

[0007] To achieve the above-mentioned purpose, the present application provides an acoustic fish-attracting system for fish schools in a deep-sea aquaculture environment, the acoustic fish-attracting system for fish schools in a deep-sea aquaculture environment comprising a plurality of hydrophones, a data processing and control center, a signal generator, a power amplifier, a water-energy sound-converting device, a feeding device and an automatic collection and capture control device, the hydrophones are connected to the data processing and control center via a serial port, the data processing and control center is connected to the signal generator via a data line, the signal generator is connected to the power amplifier via a data line, the power amplifier is connected to the water-energy sound-converting device via a data line, the data processing and control center is connected to the feeding device via a data line, and the data processing and control center is connected to the automatic collection and capture control device via a data line;

[0008] The hydrophone is used to collect natural predation signals of fish schools and send the natural predation signals to the data processing and control center;

[0009] The data processing and control center is used to receive the natural predation signal, obtain a waveform and a frequency according to the natural predation signal, and send control instructions and parameter settings to the signal generator according to the waveform and frequency;

[0010] The signal generator is used to receive the control instruction and the parameter setting, generate a first electrical signal based on the control instruction and the parameter setting, and send the first electrical signal to the power amplification device;

[0011] The power amplifier is used to amplify the first electrical signal to obtain a second electrical signal, and send the second electrical signal to the water energy sound conversion device;

[0012] The water energy sound conversion device is used to convert the second electrical signal into a fish attracting signal and output the fish attracting signal;

[0013] The feeding device is used to feed the school of fish;

[0014] The automatic gathering and catching control device is used for catching the fish school.

[0015] Optionally, the data processing and control center includes a network switch and an industrial computer;

[0016] The network switch is used to receive the natural predation signal and send the natural predation signal to the industrial computer;

[0017] The industrial computer is used to obtain a waveform and a frequency according to the natural predation signal, and send control instructions and parameter settings to the signal generator according to the waveform and the frequency.

[0018] Optionally, the industrial computer is also used to control the feeding device and the automatic collection and catching control device to complete the feeding and catching operations of the fish school.

[0019] Optionally, the hydrophones are installed on the center and edge columns of deep-sea aquaculture cages to form a surround acoustic monitoring network.

[0020] Optionally, the water energy sound exchange device is installed on the central pillar of the deep sea aquaculture platform to ensure that the sound wave signal can evenly cover the entire cage area.

[0021] Optionally, the feeding device is fixed on a central pillar of the deep-sea aquaculture platform.

[0022] In addition, to achieve the above-mentioned purpose, the present application proposes an acoustic fish attracting method for fish schools in a deep-sea aquaculture environment, which is applied to an acoustic fish attracting system for fish schools in the deep-sea aquaculture environment. The method comprises:

[0023] The natural predation signals of fish schools are collected by hydrophone according to the iterative cycle;

[0024] generating a fish gathering signal according to the natural predation signal;

[0025] Training the feeding reflex of the fish school according to the fish gathering signal;

[0026] Setting an iteration cycle based on the growth and development cycle of the fish school;

[0027] Based on the iteration cycle, updating the fish gathering signal until the fish school reaches the fishing standard, so that the fish gathering signal is adapted to the growth and development cycle of the fish school;

[0028] If the fish school reaches the fishing standard, the fish school is caught by outputting a fish gathering signal corresponding to the growth period of the fish school through the water energy sound conversion device.

[0029] Optionally, the step of generating a fish gathering signal according to the natural predation signal comprises:

[0030] enhancing the high frequency components of the natural predation signal to obtain a first signal array;

[0031] Performing framing and windowing processing on the first signal array to obtain a second signal array;

[0032] Based on the second signal array, a signal spectrum matrix is ​​obtained, wherein the elements of the signal spectrum matrix represent the magnitude of the signal capability strength;

[0033] Based on the signal spectrum matrix, a spectrum diagram is obtained;

[0034] Extracting the frequency band with the highest capability intensity in the spectrum graph as the target frequency band;

[0035] Performing weighted processing on the target frequency band according to the distribution of each target frequency point in the target frequency band;

[0036] The target frequency band after weighted processing is used as a fish attracting signal.

[0037] Optionally, the training of the feeding reflex of the fish school according to the fish gathering signal comprises:

[0038] When the fish school is in the fry cultivation period, feeding is performed regularly by setting a feeding device in a fixed area;

[0039] While the fish school is feeding, the fish gathering signal is played through the signal generator to make the fish school form a feeding reflex.

[0040] Optionally, the method further comprises:

[0041] In preset weather conditions, reducing or stopping feeding the fish school through the feeding device;

[0042] Get the preset stable signal;

[0043] The stabilization signal is transmitted through a water energy sound exchange device to stabilize the school of fish.

[0044] The present application collects the natural predation signal of the fish school through a hydrophone, and sends the natural predation signal to the data processing and control center; the data processing and control center receives the natural predation signal, and obtains the waveform and frequency according to the natural predation signal, sends the control instruction and parameter setting to the signal generator according to the waveform and frequency, receives the control instruction and the parameter setting at the signal generator, and generates a first electric signal based on the control instruction and the parameter setting, sends the first electric signal to the power amplifier, and then amplifies the first electric signal through the power amplifier to obtain a second electric signal, sends the second electric signal to the water energy sound conversion device, and finally the water energy sound conversion device converts the second electric signal into a fish gathering signal, outputs the fish gathering signal, and is used to feed the fish school through the feeding device; when the fish school reaches the fishing standard, the fish school is fished by the automatic gathering control device. The collected natural predation signal of the fish school is converted into a fish gathering signal. Compared with the traditional artificial synthetic sound, this natural acoustic signal can better resonate with the fish, thereby improving the efficiency of fish gathering and fishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0047] Figure 1 This is a structural block diagram of the first embodiment of the acoustic fish attracting system for fish schools in deep-sea aquaculture environments of the present application;

[0048] Figure 2 A flow chart of Example 1 of the acoustic fish attracting method for fish schools in a deep-sea aquaculture environment of the present application is provided.

[0049] Description of Figure Numbers:

[0050] Hydrophone 10, data processing and control center 20, signal generator 30, power amplifier 40, water energy sound conversion device 50, feeding device 60, automatic collection and capture control device 70, network switch 201, industrial computer 202.

[0051] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0052] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0053] The embodiment of the present invention provides an acoustic fish attracting system for fish schools in a deep sea aquaculture environment, referring to Figure 1 , Figure 1 The present invention is a schematic structural diagram of an acoustic fish attracting system for fish schools in a deep-sea aquaculture environment.

[0054] In this embodiment, the acoustic fish luring system for fish schools in the deep-sea aquaculture environment includes multiple hydrophones 10, a data processing and control center 20, a signal generator 30, a power amplifier 40, a water energy sound conversion device 50, a feeding device 60 and an automatic collection and capture control device 70. The hydrophone 10 is connected to the data processing and control center 20 via a serial port, the data processing and control center 20 is connected to the signal generator 30 via a data line, the signal generator 30 is connected to the power amplifier 40 via a data line, the power amplifier 40 is connected to the water energy sound conversion device 50 via a data line, the data processing and control center 20 is connected to the feeding device 60 via a data line, and the data processing and control center 20 is connected to the automatic collection and capture control device 70 via a data line.

[0055] In this embodiment, the hydrophone 10 is used to collect natural predation signals of fish schools and send the natural predation signals to the data processing and control center 20;

[0056] It should be noted that the hydrophone 10 is an acoustic device designed for use in water. It can convert acoustic signals into electrical signals to receive acoustic signals in water and to capture acoustic signals generated by fish during predation. These signals include but are not limited to swallowing sounds, swimming sounds, etc., which are the basis for subsequent analysis and generation of fish gathering signals. The hydrophone 10 can be installed on the center and edge columns of deep-sea aquaculture cages to form a surround acoustic monitoring network. Such an arrangement can ensure that comprehensive acoustic data is collected from multiple angles and positions, and improve the accuracy and comprehensiveness of signal collection. The hydrophone 10 can also be connected to the data serial port of the network switch 201 of the switch data processing and control center 20 through an underwater cable to realize real-time transmission of data such as natural predation signals.

[0057] In addition, when the fish school needs to eat, the hydrophone 10 captures the acoustic signals generated by the fish school during the feeding process. These signals include but are not limited to the swallowing sound of feeding, the swimming sound, etc., and then the acoustic signals (natural feeding signals) are converted into electrical signals and transmitted to the industrial computer 202 through the network switch 201, so that the industrial computer 202 can process the acoustic signals later.

[0058] The data processing and control center 20 is used to receive the natural predation signal, obtain a waveform and a frequency according to the natural predation signal, and send control instructions and parameter settings to the signal generator 30 according to the waveform and frequency;

[0059] It should be noted that the data processing and control center 20 can be a facility specially designed for storing, managing and transmitting large amounts of data. It usually includes servers, storage systems, network equipment, and power and cooling systems required to ensure the stable operation of these systems. In the present application, the data processing and control center 20 mainly includes a network switch 201 and an industrial computer 202. The network switch 201 is used to receive the natural predation signal and send the natural predation signal to the industrial computer 202. The industrial computer 202 is used to obtain the waveform and frequency according to the natural predation signal, and send control instructions and parameter settings to the signal generator 30 according to the waveform and frequency; it is also used to control the feeding device 60 and the automatic collection and capture control device 70 to complete the feeding and fishing operations of the fish school.

[0060] It should also be noted that the network switch 201 can be a network device for connecting multiple network devices (such as computers, printers, servers, etc.), and it plays a core hub role in the network. The main function of the switch is to forward data packets, and it can decide which port to send the data packet to based on the MAC address (physical address) in the data packet; the industrial computer 202 can be a computer specially designed for industrial sites. Compared with traditional commercial computers, the industrial computer 202 has stronger stability, durability and environmental adaptability, and can adapt to various harsh industrial environmental conditions, such as high temperature, low temperature, humidity, dust, vibration, etc.

[0061] In addition, when the industrial computer 202 receives the natural predation signal of the fish school through the network switch, it performs complex calculations such as preprocessing, feature extraction and pattern recognition on the natural predation signal to obtain a waveform and frequency based on the natural predation signal. The waveform and frequency can partially reflect the feeding behavior and acoustic characteristics of the fish. At the same time, the signal generator 30, the feeding device 60 and the automatic capture control device 70 are controlled by sending different control instructions.

[0062] The signal generator 30 is used to receive the control instruction and the parameter setting, generate a first electrical signal based on the control instruction and the parameter setting, and send the first electrical signal to the power amplification device 40;

[0063] It should be noted that the signal generator 30 may be an electronic device that can generate an electrical signal with a specific frequency, waveform and amplitude.

[0064] The power amplifier 40 is used to amplify the first electrical signal to obtain a second electrical signal, and send the second electrical signal to the water energy sound conversion device 50;

[0065] It should be noted that the power amplifier 40 can be an electronic device whose main function is to amplify the input weak signal (usually an audio or radio frequency signal) to a sufficient power level. In the present application, the weak electrical signal (first electrical signal) generated by the signal generator 30 is amplified to meet the requirements of the water energy sound exchange device 50 for the input signal power, wherein the input end of the power amplifier 40 is connected to the signal generator 30, and the output end is connected to the water energy sound exchange device 50.

[0066] The water energy sound conversion device 50 is used to convert the second electrical signal into a fish attracting signal and output the fish attracting signal;

[0067] It should be noted that the water-energy sound-converting device 50 is generally referred to as a water-acoustic transducer, which is an acoustic device that transmits and receives sound waves underwater. It can convert electrical signals into water-acoustic signals or convert water-acoustic signals into electrical signals. In the present application, the water-energy sound-converting device 50 is installed on the central pillar of the deep-sea aquaculture platform to ensure that the sound wave signal can evenly cover the entire cage area, convert the amplified electrical signal (second electrical signal) into a sound wave signal, and transmit it to the fish in the cage through the water body.

[0068] The feeding device 60 is used to feed the fish school;

[0069] It should be noted that the feeding device 60 may include a cyclone vortex mixer, a seawater pipeline, a main feeding pipeline and a feed feeding manifold. The device forms a rotating downward vortex through a seawater turbine chamber, drives the feed into the main feeding pipeline, and feeds it into the net cage through multiple points. The feeding device 60 is fixed on the central pillar of the deep-sea aquaculture platform.

[0070] The automatic catching control device 70 is used to catch the fish school.

[0071] It should be noted that when the fish school reaches the fishing standard, the fish school is caught by the automatic gathering and catching control device 70.

[0072] The present application collects natural predation signals of fish schools through a hydrophone 10, and sends the natural predation signals to the data processing and control center 20; the data processing and control center 20 receives the natural predation signals, and obtains a waveform and a frequency according to the natural predation signals, sends control instructions and parameter settings to the signal generator 30 according to the waveform and the frequency, receives the control instructions and the parameter settings at the signal generator 30, and generates a first electrical signal based on the control instructions and the parameter settings, sends the first electrical signal to the power amplifier 40, and then amplifies the first electrical signal through the power amplifier 40 to obtain a second electrical signal, sends the second electrical signal to the water energy sound exchange device 50, and finally the water energy sound exchange device 50 converts the second electrical signal into a fish gathering signal, outputs the fish gathering signal, and uses it to feed the fish school through the feeding device 60; when the fish school reaches the fishing standard, the fish school is fished by the automatic gathering control device 70. It has achieved the transformation of the collected natural feeding signals of fish schools into fish attracting signals. Compared with traditional artificial synthetic sounds, this natural acoustic signal can resonate better with fish, thereby improving the efficiency of fish attracting and catching.

[0073] The present application embodiment provides an acoustic fish attracting method for fish schools in a deep-sea aquaculture environment, referring to Figure 2 , Figure 2 This is a flow chart of the first embodiment of the acoustic fish attracting method for fish schools in a deep-sea aquaculture environment of the present application.

[0074] In this embodiment, the acoustic fish attracting method for fish schools in the deep sea aquaculture environment includes:

[0075] Step S10: collecting natural predation signals of fish schools through the hydrophone 10 according to the iteration cycle;

[0076] It should be noted that the iteration period may be the time interval for the hydrophone 10 to collect natural predation signals of fish schools. For example, the iteration period may be set to 1 day, and natural predation signals of fish schools are collected once every day.

[0077] It can be understood that by collecting natural predation signals according to an iterative cycle, the problem of signal failure caused by the growth of the fish school is avoided, ensuring that the natural predation signals can more accurately match the auditory preferences and behavioral habits of fish at different growth stages.

[0078] Step S20: generating a fish gathering signal according to the natural predation signal;

[0079] It should be noted that the natural predation signal is collected by the hydrophone 10, which can be the acoustic signal generated by the fish during the predation process. These signals include but are not limited to the swallowing sound of feeding, the swimming sound, etc. The fish gathering signal is output by the water acoustic transducer, propagated through the water body, and covers the fish school in the cage.

[0080] It can be understood that by converting the natural predation signals of fish schools actually collected into fish gathering signals, this type of sound has a natural attraction to fish, thereby more effectively stimulating the gathering behavior of fish schools.

[0081] In a feasible implementation, step S20 may include steps A21 to A27:

[0082] Step A21: enhancing the high-frequency components of the natural predation signal to obtain a first signal array;

[0083] It should be noted that the first signal array may be obtained by performing pre-emphasis processing on the natural predation signal, and the purpose of the pre-emphasis processing is to increase the intensity of the high-frequency part of the audio signal.

[0084] It can be understood that by enhancing the high-frequency components of natural predation signals, it is beneficial to enhance the high-frequency components to improve the clarity of the sound.

[0085] Step A22: performing framing and windowing processing on the first signal array to obtain a second signal array;

[0086] It should be noted that framing, also known as framing or block processing, may refer to the process of dividing a continuous signal into a series of shorter, fixed-length frames or blocks, and windowing refers to the process of multiplying each frame signal by a window function after framing. The window function is a mathematical function that takes a value of 1 near the center of the frame and gradually decreases to 0 at the edge. The purpose of windowing is to reduce the discontinuity of the frame edge, thereby reducing spectrum leakage. The second signal array may be an array in which the size of the number represents the signal strength.

[0087] It can be understood that spectrum leakage can be effectively suppressed by performing framing and windowing processing.

[0088] Exemplarily, the first signal array is framed and windowed. First, the first signal array is divided into frames of fixed length. A Hamming window that can effectively suppress spectrum leakage is selected as a window function. Each frame of the signal is processed. The window function is as follows:

[0089]

[0090] Among them, α is a parameter that controls the window shape, N is the length of the window, and for n<0 or n≥N, the value of the window function is 0.

[0091] Step A23: obtaining a signal spectrum matrix based on the second signal array, wherein the elements of the signal spectrum matrix represent the magnitude of signal energy intensity;

[0092] It should be noted that the signal spectrum matrix can be a representation of the signal in the frequency domain obtained by Fourier transform or other spectrum analysis methods. This matrix contains the strength or amplitude information of the signal at different frequency components.

[0093] Exemplarily, the time domain signal (second signal array) is converted to the frequency domain using Fast Fourier Transform (FFT) to obtain its linear spectrum characteristics. The conversion equation is as follows:

[0094]

[0095] Among them, X(k) represents the result of Fourier transform, which represents the amplitude and phase information of the signal at the kth frequency component, and x(n) represents the original discrete time signal (the second signal array), where n is the time index, This is a complex exponential function used to convert time domain signals to frequency domain, where j is an imaginary unit (j 2 =1), 2π / N is the normalization factor of the frequency.

[0096] Step A24: obtaining a spectrum diagram based on the signal spectrum matrix;

[0097] It should be noted that the spectrogram is a graphical representation used to show the distribution of a signal at different frequencies. It is a visualization method that converts a signal from the time domain to the frequency domain.

[0098] Exemplarily, a triangular frequency filter bank is applied to the signal spectrum matrix. The triangular frequency filter bank is a series of bandpass filters. The filtered signal spectrum matrix is ​​passed through the triangular frequency filter bank to obtain the spectrum of each frame. The spectrum changes over time are plotted as a graph, and colors are usually used to represent the intensity of different frequency components.

[0099] In this work, a triangular frequency filter bank consisting of 64 bandpass filters H m (k) is composed of the following transfer functions:

[0100]

[0101] Where, 0≤m≤M, M is the number of triangular frequency filters, ∑H m (k) = 1, f(m) is the center frequency of the filter.

[0102] The signal energy in each triangular frequency filter is then obtained.

[0103]

[0104] Where S(m) is the signal energy in each filter, H m (k) represents a bandpass filter, X(k) represents the result of Fourier transform, and M is the number of triangular frequency filters.

[0105] Step A25: extracting the frequency band with the highest energy intensity in the spectrum graph as the target frequency band;

[0106] It should be noted that a frequency band refers to a continuous area with a specific frequency range in the spectrum.

[0107] Step A26: performing weighted processing on the target frequency band according to the distribution of each target frequency point in the target frequency band;

[0108] It should be noted that weighted processing is a technique widely used in data analysis. It adjusts the influence of different data points in the analysis results by assigning different weights to them.

[0109] Step A27: using the weighted target frequency band as a fish attracting signal.

[0110] It should be noted that the fish-attracting signal may be a sound signal for attracting fish, and the working principle of the fish-attracting signal is mainly to utilize the fish's tendency to move toward sound.

[0111] In this embodiment, the high frequency part of the collected natural predation signal is first enhanced, and then the processed signal is framed and windowed, that is, the signal is divided into frames according to a certain length, and then the frame signal is processed by the window function on this basis, so that the beginning and end of the frame signal become smooth to avoid signal distortion. After the above processing of the signal is completed, the characteristics of the signal are obtained by fast Fourier transform, such as the amplitude and frequency of the signal, and these characteristics are stored in the second signal array, and the triangular frequency filter adds a restriction to the result of the fast Fourier transform, and the result of the fast Fourier transform (the second signal array) is used as the input of the triangular frequency filter to capture the sound signal whose signal characteristics meet the requirements of the triangular frequency filter, and obtain the spectrum diagram. At the same time, the energy of the signal must also be obtained. The spectrum diagram stores the characteristics of the sound signal that meets the requirements of the fish gathering signal. According to the spectrum diagram, the signal with high energy intensity is further enhanced, and its frequency and waveform are obtained according to the enhanced signal. The signal transmitter and power amplifier 40 generate the fish gathering signal according to the frequency and waveform.

[0112] It can be understood that by converting natural predation signals into frequency spectrograms, the feeding behavior of fish schools can be visualized, and the frequency band with the highest ability intensity is used as the target frequency graph to ensure that the generated sound wave signal can accurately reflect the feeding preference of golden pomfret, thereby effectively improving the efficiency of training fish schools' feeding responses.

[0113] The above is only a feasible implementation of step S20 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S20.

[0114] Step S30: training the feeding reflex of the fish school according to the fish gathering signal;

[0115] It should be noted that the feeding reflex of a school of fish is a biological phenomenon, which refers to the collective feeding behavior of a school of fish when encountering food. This behavior can be triggered by a variety of factors, such as visual stimulation, chemical signals, sound signals, etc. In this application, it is achieved by sound signals (sound signals).

[0116] It is understandable that by training the feeding reflex of fish schools through fish gathering signals, the feeding amount can be controlled more accurately, the response of fish schools to feeding signals can be enhanced, and the foraging efficiency can be improved.

[0117] In a feasible embodiment, the step S30 includes, when the fish school is in the fry cultivation period, regularly feeding by setting a feeding device 60 in a fixed area; while the fish school is feeding, playing the fish gathering signal through the signal generator 30 to enable the fish school to form a feeding reflex.

[0118] A feeding point is set in the central area of ​​the breeding net cage, and feeding is performed regularly. When the fish are feeding, a sound wave signal (fish gathering signal) with high feeding intensity of the school of fish is played by a signal generator 30 .

[0119] It is understandable that through continuous feeding training, the fish will develop a sense of familiarity and belonging to the central area, which is conducive to the subsequent automated trapping of the fish by playing specific feeding sound wave signals when the fish meet the fishing standards, thereby improving fishing efficiency.

[0120] The above is only a feasible implementation of step S30 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S30.

[0121] Step S40: setting an iteration cycle based on the growth and development cycle of the fish school;

[0122] Step S50: Based on the iteration cycle, updating the fish gathering signal until the fish school reaches the fishing standard, so that the fish gathering signal is adapted to the growth and development cycle of the fish school;

[0123] It should be noted that the iteration cycle can be a fixed time length. The fishing standard can be to catch the fish after the fish have been fed for a period of time.

[0124] It can be understood that as the fish school grows and develops, the iteration cycle is set to 1 day. By updating the fish gathering signal, the waveform and frequency of the sound signal are continuously adjusted to adapt to the auditory changes of the fish to ensure that the signal is closely matched with the growth stage of the fish school.

[0125] First, it is necessary to set a check and adjustment cycle (iteration cycle) according to the growth and development cycle of the fish. For example, assuming that the fish grows fastest in the first few months, the iteration cycle in this period needs to be set to 1 day, because the growth and development speed of the fish is relatively fast at this time, and the natural predation signals generated also change rapidly, so the corresponding generated fish gathering signals also need to be iterated in time to adapt to the auditory changes of the fish school. This method can ensure that the fish school grows at the fastest speed and is also conducive to the training of the fish school's feeding response.

[0126] Step S60: If the fish school meets the fishing standard, the water energy sound exchange device 50 outputs a fish gathering signal corresponding to the growth period of the fish school to catch the fish school.

[0127] The fish catching standard can be determined by monitoring the growth cycle of the fish and regularly checking the size and weight of the fish. For example, 50 fish can be caught randomly and the average weight of the fish can be calculated. When the weight of the fish exceeds the set weight, the fish is considered to have reached the catching standard.

[0128] In this embodiment, the natural feeding signals of the fish school are collected through the hydrophone 10 according to the iteration cycle; the fish gathering signal is generated according to the natural feeding signal; the feeding reflex of the fish school is trained according to the fish gathering signal; the iteration cycle is set based on the growth and development cycle of the fish school; the fish gathering signal is updated based on the iteration cycle until the fish school reaches the fishing standard, so that the fish gathering signal is adapted to the growth and development cycle of the fish school; if the fish school reaches the fishing standard, the fish gathering signal corresponding to the growth period of the fish school is output through the water energy sound conversion device 50 to catch the fish school. By using the acoustic signal of the fish when feeding naturally as the fish gathering signal, and updating the fish gathering signal with the growth and development cycle of the fish school, it is ensured that the fish gathering signal can maintain a high effectiveness throughout the entire breeding cycle, avoiding the problem of signal failure caused by the growth of the fish school, thereby achieving efficient and accurate fish school fishing operations.

[0129] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present application. In specific applications, technicians in this field can make settings as needed, and the present application does not impose any limitation on this.

[0130] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present application. In practical applications, technicians in this field can select part or all of it according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0131] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0132] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0133] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An acoustic fish attracting system for fish schools in deep sea aquaculture environment, characterized in that: The acoustic fish attracting system for fish schools in a deep-sea aquaculture environment comprises a plurality of hydrophones, a data processing and control center, a signal generator, a power amplifier, a water-energy sound conversion device, a feeding device and an automatic collection and capture control device, wherein the hydrophone is connected to the data processing and control center via a serial port, the data processing and control center is connected to the signal generator via a data line, the signal generator is connected to the power amplifier via a data line, the power amplifier is connected to the water-energy sound conversion device via a data line, the data processing and control center is connected to the feeding device via a data line, and the data processing and control center is connected to the automatic collection and capture control device via a data line; The hydrophone is used to collect natural predation signals of fish schools and send the natural predation signals to the data processing and control center; The data processing and control center is used to receive the natural predation signal, obtain a waveform and a frequency according to the natural predation signal, and send control instructions and parameter settings to the signal generator according to the waveform and frequency; The signal generator is used to receive the control instruction and the parameter setting, generate a first electrical signal based on the control instruction and the parameter setting, and send the first electrical signal to the power amplification device; The power amplifier is used to amplify the first electrical signal to obtain a second electrical signal, and send the second electrical signal to the water energy sound conversion device; The water energy sound conversion device is used to convert the second electrical signal into a fish attracting signal and output the fish attracting signal; The feeding device is used to feed the school of fish; The automatic gathering and catching control device is used for catching the fish school.

2. The acoustic fish attracting system for fish schools in deep sea aquaculture environment as claimed in claim 1, characterized in that: The data processing and control center includes a network switch and an industrial computer; The network switch is used to receive the natural predation signal and send the natural predation signal to the industrial computer; The industrial computer is used to obtain a waveform and a frequency according to the natural predation signal, and send control instructions and parameter settings to the signal generator according to the waveform and the frequency.

3. The acoustic fish attracting system for fish schools in deep sea aquaculture environment as claimed in claim 2, characterized in that: The industrial computer is also used to control the feeding device and the automatic collection and catching control device to complete the feeding and catching operations of the fish school.

4. The acoustic fish attracting system for fish schools in deep sea aquaculture environment as claimed in claim 1, characterized in that: The hydrophones are installed on the center and edge columns of deep-sea aquaculture cages to form a surrounding acoustic monitoring network.

5. The acoustic fish attracting system for fish schools in deep sea aquaculture environment as claimed in claim 1, characterized in that: The water energy sound exchange device is installed on the central pillar of the deep sea aquaculture platform to ensure that the sound wave signal can evenly cover the entire cage area.

6. The acoustic fish attracting system for fish schools in deep sea aquaculture environment as claimed in claim 1, characterized in that: The feeding device is fixed on the central pillar of the deep-sea aquaculture platform.

7. An acoustic fish luring method for fish schools in deep sea aquaculture environment, characterized in that: The acoustic fish attracting method for fish schools in a deep-sea aquaculture environment is applied to the acoustic fish attracting system for fish schools in a deep-sea aquaculture environment as described in any one of claims 1 to 6, and the acoustic fish attracting method for fish schools in a deep-sea aquaculture environment comprises: The natural predation signals of fish schools are collected by hydrophone according to the iterative cycle; generating a fish gathering signal according to the natural predation signal; Training the feeding reflex of the fish school according to the fish gathering signal; Setting an iteration cycle based on the growth and development cycle of the fish school; Based on the iteration cycle, updating the fish gathering signal until the fish school reaches the fishing standard, so that the fish gathering signal is adapted to the growth and development cycle of the fish school; If the fish school reaches the fishing standard, the fish school is caught by outputting a fish gathering signal corresponding to the growth period of the fish school through the water energy sound conversion device.

8. The method according to claim 7, characterized in that The step of generating a fish gathering signal according to the natural predation signal comprises: enhancing the high frequency components of the natural predation signal to obtain a first signal array; Performing framing and windowing processing on the first signal array to obtain a second signal array; Based on the second signal array, a signal spectrum matrix is ​​obtained, wherein the elements of the signal spectrum matrix represent the magnitude of signal energy intensity; Based on the signal spectrum matrix, a spectrum diagram is obtained; Extracting the frequency band with the highest energy intensity in the spectrum as the target frequency band; Performing weighted processing on the target frequency band according to the distribution of each target frequency point in the target frequency band; The target frequency band after weighted processing is used as a fish attracting signal.

9. The method according to claim 7, characterized in that The method of training the feeding reflex of the fish school according to the fish gathering signal comprises: When the fish school is in the fry cultivation period, feeding is performed regularly by setting a feeding device in a fixed area; While the fish school is feeding, the fish gathering signal is played through the signal generator to make the fish school form a feeding reflex.

10. The method according to any one of claims 7 to 9, characterized in that The method further comprises: In preset weather conditions, reducing or stopping feeding the fish school through the feeding device; Get the preset stable signal; The stabilization signal is transmitted through a water energy sound exchange device to stabilize the school of fish.

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