Method for calculating underwater illuminance distribution of LED fish gathering lamp

Abstract

The invention relates to the technical field of marine intelligent analysis, and particularly discloses an LED fish gathering lamp underwater illuminance distribution calculation method, which comprises the following steps: dividing a water body in a gridding manner, calculating coordinates of a light source to each point on the sea surface, and expressing the coordinates of a fish gathering lamp in a matrix form; fitting the anisotropy light intensity distribution condition of the LED fish gathering lamp based on a Lambert illumination model, and calculating the luminous flux and the light intensity under the preset wavelength based on the anisotropy light intensity distribution condition; light distribution environment assumption is conducted on the sea surface condition of the LED fish gathering lamp, and assumed conditions are extracted; gridding seawater, calculating luminous flux in each grid, storing the luminous flux in a matrix form, and calculating an included angle between a light path and a light water entry normal vector and a total illuminance value of all fish gathering lamps reaching each point on the sea surface; and programming the calculation formula by utilizing MATLAB software, and establishing an LED fish gathering lamp illumination model so as to calculate a coordinate point of a specific illumination value.

Description

Technical Field

[0001] The present invention relates to the field of marine intelligent analysis technology, and more specifically, to a method for calculating underwater illumination distribution of an LED fish attracting lamp. Background Art

[0002] Most existing methods for calculating the illumination of fish-attracting lights rely on simple geometric optical models or empirical formulas, which can provide some guidance in specific situations, but have many limitations in practical applications. Usually, existing technologies simplify light sources into point or line light sources, ignoring the interaction between multiple light sources and the physical effects of light propagating in water (such as refraction, scattering and absorption). There is also the problem of inaccurate prediction of illumination intensity at different depths under the water surface in the case of multiple light sources.

[0003] 1. Improper handling of the superposition effect of multiple light sources: Existing calculation methods usually use a single light source model or a simplified geometric method to estimate the light distribution. In practical applications, this ignores the mutual influence between multiple light sources, resulting in inaccurate calculation results.

[0004] 2. Insufficient consideration of light propagation characteristics in water: When light propagates in water, it is affected by various physical effects such as refraction, scattering and absorption. Existing technologies often deal with these aspects in a simplified or incomplete manner, which makes it impossible to accurately reflect the actual lighting conditions.

[0005] 3. Insufficient processing of wavelength-related light propagation characteristics: Light of different wavelengths has different propagation characteristics in water, including absorption, scattering and attenuation, which has a significant impact on the calculation of illuminance. However, the existing technology often does not consider this aspect in depth and cannot effectively distinguish the illuminance distribution characteristics at different wavelengths, thus affecting the accuracy and effectiveness of fishery operations.

[0006] 4. Poor versatility and adaptability of the model: The arrangement of fish attracting lights and environmental conditions of different fishing vessels vary greatly. Existing models are usually designed for specific conditions and lack the ability to adapt to different scenarios.

[0007] In view of this, the present invention provides a method for calculating the underwater illumination distribution of an LED fish attracting lamp to solve the above-mentioned problem. Summary of the invention

[0008] In order to overcome the problems in the prior art, the present invention proposes a method for calculating the underwater illumination distribution of an LED fish attracting lamp, thereby optimizing fishery production.

[0009] The present invention provides a method for calculating the underwater illumination distribution of an LED fish attracting lamp, comprising the following steps:

[0010] Step S1: Divide the water body into grids, calculate the coordinates of each point on the sea surface from the light source, and express the coordinates of the fish attracting lights in a matrix form;

[0011] Step S2: fitting the anisotropic light intensity distribution of the LED fish attracting lamp based on the Lambert illumination model, and calculating the luminous flux and light intensity at a preset wavelength based on the anisotropic light intensity distribution;

[0012] Step S3: Make a light distribution environment assumption for the sea surface conditions of the LED fish attracting lamp and extract the assumption conditions;

[0013] Step S4: grid the seawater, calculate the luminous flux in each grid, store it in a matrix form, calculate the angle between the light path and the normal vector of the light entering the water, and the total illuminance value of all fish attracting lights reaching each point on the sea surface;

[0014] Step S5: Use MATLAB software to program the above calculation formula and establish an illumination model of the LED fish attracting lamp to calculate the coordinate points of specific illumination values.

[0015] The matrix calculation method is used to solve the problem of illuminance distribution of multiple light sources. Through matrix operation, the complex synergy between multiple light sources can be effectively processed, avoiding the high amount of calculation and low efficiency caused by point-by-point calculation in traditional methods. This matrix calculation method greatly improves the calculation efficiency, making it possible to quickly and accurately complete the illuminance calculation in the case of large-scale fishing boat lighting arrangements.

[0016] As a preferred technical solution proposed by the present invention, the coordinate definition logic is:

[0017] Obtaining the position information of the fish attracting lights, including the distance between the first fish attracting light at the bow and the bow, the distance between two fish attracting lights in the same row, and the distance between two rows of fish attracting lights on the port side and the starboard side;

[0018] The coordinates of the two columns of fish-attracting lights on the port and starboard sides are marked, and the coordinates of the light sources to each point on the sea surface are calculated to express the coordinates of the fish-attracting lights in a matrix form.

[0019] As a preferred technical solution proposed by the present invention, the coordinate definition logic is:

[0020] The coordinates of the fish attracting lamp are Taking the port side as an example, L is the Lth fish attracting light on the port side, L = 1, 2, ... n1; it can be expressed in matrix form as:

[0021]

[0022] Among them, b is the distance between the first light on the bow and the bow, d is the distance between the two lights in the same row of fish-attracting lights, D is the distance between the two rows of lights on the port side and the starboard side, and h is the height of the fish-attracting lights from the water surface.

[0023] By considering the synergistic effect of multiple light sources, the illumination calculation is ensured to be more accurate, avoiding the error caused by simple linear superposition in the prior art.

[0024] As a preferred technical solution proposed by the present invention, the calculation logic of the intensity distribution of LED fish attracting light based on the Lambert illumination model is:

[0025] Collect the luminous intensity data of the LED fish attracting lamp in various directions, and use the Lambert illumination model to fit the light distribution curve function of the luminous intensity of the LED fish attracting lamp in various directions;

[0026] Calculate the luminous flux emitted per unit time at a specific wavelength;

[0027] Use the light distribution curve function and the relative spectral power distribution of the LED to calculate the luminous intensity at the wavelength and angle;

[0028] The illuminance distribution is calculated based on the luminous intensity data of the LED fish attracting lamp in various directions.

[0029] Taking into account the relatively concentrated effective luminous area of ​​LED lamps, the Lambert illumination model is introduced to fit the anisotropic light intensity distribution characteristics. This method can accurately describe the luminous intensity of LED fish attracting lamps in different directions by combining the spectral power distribution at a specific wavelength, providing a basis for high-precision illumination calculation.

[0030] As a preferred technical solution proposed by the present invention, the assumptions include:

[0031] The sea surface is completely black and is not affected by background light such as the moon;

[0032] The sea surface is calm, and the light rays only hit the sea surface once;

[0033] Each fish attracting lamp has the same light distribution characteristics, and all lamps are at the same vertical distance from the water surface.

[0034] As a preferred technical solution proposed by the present invention, the calculation logic of the illumination above water is:

[0035] The seawater is gridded based on the pre-set grid size. When the light is emitted from the fish attracting lamp and reaches the sea surface, the light flux in each grid is calculated and stored in the form of a matrix.

[0036] Calculate the angle between the light path of all fish attracting lights reaching each point on the water surface and the normal vector of the light entering the water, and express the angle between the normal vector of the light entering the water in the form of a matrix;

[0037] Given the path length of the fish attracting light to the first point on the water surface, the path length of the fish attracting light to any point on the sea surface can be derived through geometric relationships, and the path length can also be expressed in the form of a matrix;

[0038] The total illuminance value of each point is calculated by using the luminous intensity of the fish attracting lamp, the angle of the light path, the path length and the reflection effect of the sea surface using the illuminance cosine law and the independent propagation characteristics of light;

[0039] Fish-attracting lamps are anisotropic light sources. The light intensity at different nadir angles and azimuth angles is checked through the measurement results of the distribution photometer, and the light distribution curve of the fish-attracting lamp is obtained by fitting.

[0040] When light enters the water from the air, the Fresnel law can be used to calculate the light energy refraction ratio on the sea surface (point P), and the horizontal plane illuminance directly below the point (-0m). The illuminance distribution at each point underwater can be used to provide a lighting arrangement plan.

[0041] The present invention realizes underwater light field visualization by gridding seawater and combining it with three-dimensional simulation of light distribution, providing a scientific basis for optimizing the lighting scheme of fishing boats. The absorption, scattering and attenuation characteristics of light of different wavelengths when propagating in water are considered. By introducing a wavelength-dependent model, the illuminance distribution at a specific wavelength can be calculated more accurately, thereby optimizing the lighting scheme of fishing boats.

[0042] As a preferred technical solution proposed by the present invention, the processing logic of the underwater illumination calculation model is:

[0043] For any point Q underwater, any beam of light emitted from a certain direction of the fish-attracting light point L will be refracted through the only point P on the water surface. According to the law of light refraction and geometric relationship that the fish-attracting light points L, P and Q should satisfy, the angle between the light paths of points P and Q, the path length of the light from point P on the water surface to point Q, and the attenuation coefficient of the light when entering the water are extracted.

[0044] The illumination model of LED fish attracting lamps was established to calculate the coordinate points of specific illumination values.

[0045] The specific advantages of the present invention are as follows:

[0046] The present invention significantly improves the efficiency and effectiveness of fishery light lure technology, reduces calculation complexity, and enhances the flexibility and adaptability of lighting arrangement schemes through multi-light source collaborative optimization, accuracy improvement, wavelength correlation modeling, application of spatial matrix calculation methods, three-dimensional visualization simulation, and wide applicability.

[0047] Based on the synergistic effect of multiple light sources, the best coordination between light sources is achieved by accurately calculating the illuminance contribution of each light source and optimizing the light source angle. In addition, the absorption, scattering and attenuation characteristics of light of different wavelengths when propagating in water, combined with matrix calculation to process the distribution of illuminance of multiple light sources, reduce the computational complexity in space and time; can more accurately simulate the impact of spectral diversity on light distribution; through three-dimensional visualization technology, fishermen can intuitively understand the light distribution, thereby optimizing the layout of fish attracting lights, improving fishing efficiency, and thus optimizing the lighting layout plan. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a flow chart of the underwater illumination distribution calculation method of the LED fish attracting lamp of the present invention. DETAILED DESCRIPTION

[0049] 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 only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1

[0051] See also Figure 1 This embodiment provides a method for calculating the underwater illumination distribution of an LED fish attracting lamp, comprising the following steps:

[0052] Step S1: Divide the water body into grids, calculate the coordinates of each point on the sea surface from the light source, and express the coordinates of the fish attracting lights in a matrix form;

[0053] Specifically, the coordinate definition logic is:

[0054] Obtaining the position information of the fish attracting lights, including the distance between the first fish attracting light at the bow and the bow, the distance between two fish attracting lights in the same row, and the distance between two rows of fish attracting lights on the port side and the starboard side;

[0055] The coordinates of the two columns of fish-attracting lights on the port and starboard sides are marked, and the coordinates of the light sources to each point on the sea surface are calculated to express the coordinates of the fish-attracting lights in a matrix form.

[0056] More specifically, firstly, a three-dimensional rectangular coordinate system is established with the projection line of the midship line on the plane where the sea level is located as the X-axis, the vertical projection line of the stern centerline on the plane where the sea level is located as the Y-axis, the X-axis and Y-axis intersect at point O, and the Z-axis passes through point O and is perpendicular to the plane where the XY axes are located downward.

[0057] The coordinates of the fish attracting lamp are Taking the port side as an example, L is the Lth fish attracting light on the port side, L = 1, 2, ... n1; it can be expressed in matrix form as:

[0058]

[0059] Among them, b is the distance between the first light on the bow and the bow, d is the distance between two lights in the same row of fish-attracting lights, D is the distance between the two rows of lights on the port and starboard sides, and h is the height of the fish-attracting lights from the water surface.

[0060] The water body is divided into grids, and the coordinates of each point (x P ,y P ,z P ) can be obtained by the following formula:

[0061]

[0062] Among them, d P is the distance between two adjacent points on the sea surface reached by the light, θ i It is the minimum incident angle of the fish attracting lamp at point P.

[0063] It should be noted that the coordinates of the fish-attracting lamps are expressed in matrix form to provide accurate spatial coordinate information for multi-element illumination calculations, ensuring the accuracy and effectiveness of subsequent calculations.

[0064] Step S2: fitting the anisotropic light intensity distribution of the LED fish attracting lamp based on the Lambert illumination model, and calculating the luminous flux and light intensity at a preset wavelength based on the anisotropic light intensity distribution;

[0065] Specifically, the calculation logic of the LED fish-attracting light intensity distribution based on the Lambert illumination model is:

[0066] Since the light intensity of LED lamps is anisotropic, the luminous intensity of LED fish attracting lamps in all directions is fitted based on the Lambert illumination model to obtain the light distribution curve function.

[0067]

[0068] The luminous flux φ(λ) at a specific wavelength λ is:

[0069] φ(λ)=φ total ×P(λ) relative (4)

[0070] P(λ) relative is the relative spectral power distribution at a specific wavelength;

[0071] Calculate the light intensity I(λ,γ) at a specific wavelength λ and a specific angle γ:

[0072]

[0073] It should be noted that the Lambert illumination model assumes that the luminous intensity of the light source is proportional to the power of the cosine value of the angle between its normal direction and the observation direction. The power of the cosine value of the angle is usually called the Lambertian coefficient, which determines the directionality of the luminous intensity of the light source. Since the light intensity distribution of LED lamps is usually not completely uniform, the Lambert illumination model is used to fit their anisotropic light intensity distribution. The Lambert illumination model is used to fit the anisotropic light intensity distribution of LED lamps, providing key light intensity data for subsequent illumination distribution calculations.

[0074] Step S3: Make a light distribution environment assumption for the sea surface conditions of the LED fish attracting lamp and extract the assumption conditions;

[0075] Specifically, the assumptions include:

[0076] The sea surface is completely black and is not affected by background light such as the moon;

[0077] The sea surface is calm, and the light rays only hit the sea surface once;

[0078] Each fish attracting lamp has the same light distribution characteristics, and all lamps are at the same vertical distance from the water surface;

[0079] It should be noted that the calculation model is based on the assumption that the calculation is completed under ideal conditions, and the calculation model does not take into account other influencing factors such as background light and multiple incidences.

[0080] Step S4: grid the seawater, calculate the luminous flux in each grid, store it in matrix form, calculate the angle between the light path and the normal vector of the light entering the water, and the total illuminance value of all fish attracting lights reaching each point on the sea surface, and provide a lighting arrangement plan through the illuminance distribution;

[0081] Specifically, the calculation logic of water illumination is:

[0082] The seawater is gridded, and the size of each grid is d P *d P , the light is emitted to reach the sea surface, and the light flux in each grid on the sea surface is calculated respectively and stored in the form of a matrix to facilitate subsequent calculations.

[0083] α P(i,j) The angle between the light path of all the fish-attracting lights on the left reaching point P on the water surface in the i-th row and j-th column and the normal vector of the light entering the water:

[0084]

[0085] All the light path angles α are expressed in matrix form as:

[0086]

[0087] Assume that there are m2, n2 points P on the water surface.

[0088] In addition, the path length R of all the fish-attracting lights on the left reaching the first point P(i,j) on the water surface is:

[0089]

[0090] Then, the path length R of all the fish attracting lights to point P on the sea surface is:

[0091]

[0092] Since the light source is not perpendicular to the sea surface, the total illuminance value of all fish-attracting lights (the number of fish-attracting lights is n1) reaching the first point P(1,1) can be calculated using the illuminance cosine rule and the independent propagation characteristics of light as follows:

[0093]

[0094] Where I(λ,γ) is the light distribution curve fitted by the luminous intensity of the fish attracting lamp in all directions. Since the LED fish attracting lamp is an anisotropic light source, its luminous intensity changes with the direction. The light intensity at different nadir angles and azimuth angles can be checked through the measurement results of the distribution photometer.

[0095]

[0096] Due to the reflection of the sea surface on the light, the light intensity is attenuated when it passes through the sea surface and enters the seawater. θ is the light energy refraction ratio of the light on the sea surface (point P). According to the Fresnel law, its calculation formula is:

[0097]

[0098] Where: φ i is the incident angle θ at point P i The refraction angle (degrees) at this time can be obtained by Snell's law, that is, Where n is the relative refractive index of air, and c is suitable for seawater. Due to the influence of the ship's side, the minimum incident angle is θ min The corresponding refraction angle φ min They are: min =32.7°,φ min =23.9°.

[0099] Since part of the light energy is reflected when it enters the water surface from the air, the horizontal illuminance directly below point P (-0m) is It can be obtained by the following formula:

[0100]

[0101] It should be noted that: by gridding the seawater and calculating the luminous flux of each grid on the sea surface, the illuminance distribution of each point on the sea surface can be obtained by considering the angular relationship between the light and the sea surface and the path length, providing boundary conditions for underwater illuminance calculations; considering the law of refraction of light and geometric relationships, the total illuminance at any point underwater can be calculated. By accurately calculating the illuminance of each point underwater, a scientific lighting layout plan can be provided for fishery fishing and fishing efficiency can be optimized.

[0102] Step S5: programming the above calculation formula using MATLAB software to establish an illumination model of the LED fish attracting lamp to calculate the coordinate points of specific illumination values;

[0103] Specifically, the processing logic of the underwater illumination calculation model is:

[0104] For any point Q(x0,y0,z0) underwater, any beam of light emitted from a certain direction of the fish-attracting light will be refracted through the only point P on the water surface, so the fish-attracting light points L, P and Q should satisfy the law of light refraction and geometric relationship. The geometric relationship is:

[0105]

[0106] By using the known coordinates of the fish attracting lights and the position of point P on the sea surface where the light passes, the y coordinate of any point Q underwater can be obtained for the x0 coordinate of the point Q underwater. P Coordinate point. Consider z0 as an unknown parameter and solve the coordinates for a specific illuminance value using the following relationship:

[0107] Among them, the angle α' between the light paths of point P and point Q is

[0108]

[0109] In addition, the path length R′ of the light passing through point P on the water surface to point Q is:

[0110]

[0111] As light enters the seawater and moves forward R′m, it is attenuated due to absorption and scattering by the seawater. The attenuation coefficient is μ(λ). Therefore, for any point Q in the water, the total illumination E Q for:

[0112]

[0113] The MATLAB software is used to program equations (1)-(17) to establish the illumination model of the LED fish attracting lamp to calculate the coordinate points of specific illumination values, aiming to provide an accurate, efficient and adaptable illumination distribution calculation solution.

[0114] Example 2

[0115] For the parts not described in detail in this embodiment, please refer to the description of Embodiment 1. This embodiment provides an electronic device including: a processor and a memory, wherein the memory stores a computer program that can be called by the processor;

[0116] The processor executes the above-mentioned method for calculating the underwater illumination distribution of the LED fish attracting lamp by calling the computer program stored in the memory.

[0117] This embodiment also provides a computer-readable storage medium storing instructions. When the instructions are executed on a computer, the computer executes the above-mentioned method for calculating the underwater illumination distribution of an LED fish-attracting lamp.

[0118] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0119] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for calculating the underwater illumination distribution of an LED fish attracting lamp, characterized in that: The following steps are involved: Step S1: Divide the water body into grids, calculate the coordinates of each point on the sea surface from the light source, and express the coordinates of the fish attracting lights in a matrix form; Step S2: fitting the anisotropic light intensity distribution of the LED fish attracting lamp based on the Lambert illumination model, and calculating the luminous flux and light intensity at a preset wavelength based on the anisotropic light intensity distribution; Step S3: Make a light distribution environment assumption for the sea surface conditions of the LED fish attracting lamp and extract the assumption conditions; Step S4: grid the seawater, calculate the luminous flux in each grid, store it in a matrix form, calculate the angle between the light path and the normal vector of the light entering the water, and the total illuminance value of all fish attracting lights reaching each point on the sea surface; Step S5: Use MATLAB software to program the above calculation formula and establish an illumination model of the LED fish attracting lamp to calculate the coordinate points of specific illumination values.

2. The method for calculating the underwater illumination distribution of an LED fish attracting light according to claim 1, characterized in that: The coordinate definition logic is: Obtaining the position information of the fish attracting lights, including the distance between the first fish attracting light at the bow and the bow, the distance between two fish attracting lights in the same row, and the distance between two rows of fish attracting lights on the port side and the starboard side; The coordinates of the two columns of fish-attracting lights on the port and starboard sides are marked, and the coordinates of the light sources to each point on the sea surface are calculated to express the coordinates of the fish-attracting lights in a matrix form.

3. The method for calculating the underwater illumination distribution of an LED fish attracting lamp according to claim 2, characterized in that: The coordinate definition logic is: The coordinates of the fish attracting lamp are Taking the port side as an example, L is the Lth fish attracting light on the port side, L = 1, 2, ... n1; it can be expressed in matrix form as: Among them, b is the distance between the first light on the bow and the bow, d is the distance between the two lights in the same row of fish-attracting lights, D is the distance between the two rows of lights on the port side and the starboard side, and h is the height of the fish-attracting lights from the water surface.

4. The method for calculating the underwater illumination distribution of an LED fish attracting lamp according to claim 3, characterized in that: The calculation logic of the intensity distribution of LED fish-attracting light based on the Lambert illumination model is: Collect the luminous intensity data of the LED fish attracting lamp in various directions, and use the Lambert illumination model to fit the light distribution curve function of the luminous intensity of the LED fish attracting lamp in various directions; Calculate the luminous flux emitted per unit time at a specific wavelength; Use the light distribution curve function and the relative spectral power distribution of the LED to calculate the luminous intensity at the wavelength and angle; The illuminance distribution is calculated based on the luminous intensity data of the LED fish attracting lamp in various directions.

5. The method for calculating the underwater illumination distribution of an LED fish attracting lamp according to claim 4, characterized in that: The assumptions include: The sea surface is completely black and is not affected by background light such as the moon; The sea surface is calm, and the light rays only hit the sea surface once; Each fish attracting lamp has the same light distribution characteristics, and all lamps are at the same vertical distance from the water surface.

6. The method for calculating the underwater illumination distribution of an LED fish attracting lamp according to claim 5, characterized in that: The calculation logic of water illumination is: The calculation logic of water illumination is: The seawater is gridded based on the pre-set grid size. When the light is emitted from the fish attracting lamp and reaches the sea surface, the light flux in each grid is calculated and stored in the form of a matrix. Calculate the angle between the light path of all fish attracting lights reaching each point on the water surface and the normal vector of the light entering the water, and express the angle between the normal vector of the light entering the water in the form of a matrix; Given the path length of the fish attracting light to the first point on the water surface, the path length of the fish attracting light to any point on the sea surface can be derived through geometric relationships, and the path length can also be expressed in the form of a matrix; The total illuminance value of each point is calculated by using the luminous intensity of the fish attracting lamp, the angle of the light path, the path length and the reflection effect of the sea surface using the illuminance cosine law and the independent propagation characteristics of light; Fish-attracting lamps are anisotropic light sources. The light intensity at different nadir angles and azimuth angles is checked through the measurement results of the distribution photometer, and the light distribution curve of the fish-attracting lamp is obtained by fitting. When light enters the water from the air, the Fresnel law can be used to calculate the light energy refraction ratio on the sea surface (point P), the horizontal plane illumination below the horizontal plane, and the lighting arrangement plan can be provided through the illumination distribution of each point underwater.

7. The method for calculating the underwater illumination distribution of an LED fish attracting lamp according to claim 6, characterized in that: The processing logic of the underwater illumination calculation model is: For any point Q underwater, any beam of light emitted from a certain direction of the fish-attracting light point L will be refracted through the only point P on the water surface. According to the law of light refraction and geometric relationship that the fish-attracting light points L, P and Q should satisfy, the angle between the light paths of points P and Q, the path length of the light from point P on the water surface to point Q, and the attenuation coefficient of the light when entering the water are extracted. The illumination model of LED fish attracting lamps was established to calculate the coordinate points of specific illumination values.

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