Determination method, determination device and equipment for position of deep sea convergence area and medium

Abstract

The invention provides a deep sea convergence area position determination method and device, equipment and a medium, and the method comprises the steps: judging whether a target sea area meets the necessary conditions of a convergence area or not according to the hydrological environment parameters of the target sea area; if yes, establishing a sound velocity profile of the target sea area in each vertical layer and a sound ray trajectory equation of the target sea area; in a horizontal uniform hydrological environment, based on the hydrological environment parameters and the sound ray trajectory equation, constructing an expression of a sound ray span of a zero-degree emergence angle; and based on the sound velocity profile of the target sea area in each vertical layer and the expression of the sound ray span of the zero-degree emergence angle, obtaining the sound ray span of the zero-degree emergence angle, and determining the sound ray span of the zero-degree emergence angle as the convergence area position of the target sea area. In this way, the zero-degree-angle emergent sound ray span is used as the initial position of the convergence area, and the purposes of reducing the calculated amount and rapidly forecasting the position of the sound field convergence area can be achieved.

Description

Technical Field

[0001] The present application relates to the field of ocean exploration technology, and in particular to a method, device, equipment and medium for determining the position of a deep-sea convergence zone. Background Art

[0002] The convergence gain brought by the convergence zone in the deep-sea channel is a favorable factor for realizing deep-sea long-range acoustic detection and communication. Analyzing and studying the physical mechanism of the sound propagation mode in the deep-sea convergence zone has always been the focus of the study of deep-sea sound propagation laws. Therefore, in practical applications, in order to better utilize the convergence effect of the sound field, it is necessary to obtain a fast and accurate method to determine the location of the convergence zone.

[0003] Based on ray theory analysis, the convergence zone is formed by the convergence of sound rays with different grazing angles emitted by the sound source at certain distances and depths. It is a high sound intensity area with a certain width range. Affected by the horizontal non-uniform distribution of the hydrological environment, as the sound propagation distance increases, the characteristic parameters of the convergence zone far from the sound source will have a cumulative change, which makes it difficult to determine the location of the convergence zone.

[0004] In the prior art, the position of the convergence zone is determined by calculating the spectrum of the convergence zone propagation loss. This method uses the position of the gain peak as the convergence zone position, which requires the selection of a suitable sound field model for calculation. In particular, for the prediction of broadband sound propagation loss, numerical calculations require relatively fine spatial grid division to ensure sufficient accuracy, which results in large amount of calculation, long time, and inability to quickly obtain the convergence zone position. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide a method, device, equipment and medium for determining the position of a deep-sea convergence zone, using the span of a zero-degree angle outgoing sound line as the starting position of the convergence zone, so as to reduce the amount of calculation and quickly predict the position of the sound field convergence zone.

[0006] The embodiment of the present application provides a method for determining the position of a deep-sea convergence zone, the method comprising:

[0007] According to the hydrological environment parameters of the target sea area, judging whether the target sea area meets the necessary conditions for the emergence of a convergence zone;

[0008] If satisfied, then establish the sound velocity profile of the target sea area in each vertical layer and the sound line trajectory equation of the target sea area;

[0009] In a horizontal uniform hydrological environment, based on the hydrological environment parameters and the sound line trajectory equation, construct an expression for the sound line span at a zero-degree exit angle;

[0010] Based on the sound velocity profile of the target sea area in each vertical layer and the expression of the sound line span at a zero-degree exit angle, the sound line span at a zero-degree exit angle is obtained and the sound line span at a zero-degree exit angle is determined as the convergence zone position of the target sea area.

[0011] The embodiment of the present application also provides a device for determining the position of a deep-sea convergence zone, the device comprising:

[0012] A judgment module, used to judge whether the target sea area meets the necessary conditions for the emergence of a convergence zone according to the hydrological environment parameters of the target sea area;

[0013] The first building module is used to establish the sound velocity profile of the target sea area in each vertical layer and the sound line trajectory equation of the target sea area when the necessary conditions for the convergence zone to appear are met;

[0014] A second construction module is used to construct an expression of the sound line span at a zero-degree exit angle based on the hydrological environment parameters and the sound line trajectory equation in a horizontal uniform hydrological environment;

[0015] A determination module is used to obtain the sound line span at a zero-degree exit angle based on the sound velocity profile of the target sea area in each vertical layer and the expression of the sound line span at a zero-degree exit angle, and determine the sound line span at a zero-degree exit angle as the convergence zone position of the target sea area.

[0016] An embodiment of the present application also provides an electronic device, comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of a method for determining the position of a deep-sea convergence zone as described above are performed.

[0017] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for determining the position of a deep-sea convergence zone as described above are executed.

[0018] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A flow chart showing a method for determining the position of a deep-sea convergence zone provided in an embodiment of the present application is shown;

[0021] Figure 2 A sound ray propagation path diagram provided by an embodiment of the present application is shown;

[0022] Figure 3 The figure shows a sound velocity profile diagram actually measured in a certain sea area provided in an embodiment of the present application;

[0023] Figure 4 A comparison diagram of the convergence zone positions calculated by a parabolic approximation model method and a zero-degree sound ray method provided in an embodiment of the present application is shown;

[0024] Figure 5 A schematic diagram showing the structure of a device for determining the position of a deep-sea convergence zone provided in an embodiment of the present application is shown;

[0025] Figure 6 A schematic structural diagram of an electronic device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work belongs to the scope of protection of the present application.

[0027] When the sound source and the receiver are located at a shallow depth from the channel axis, the sound field will show a high sound energy concentration phenomenon at a certain distance. These areas of high sound energy are called convergence zones. The convergence zone effect can be used in applications such as long-range underwater acoustic detection, underwater acoustic communication, and sound source positioning by utilizing the gain brought by the convergence of sound waves. The convergence gain brought by the convergence zone in the deep-sea channel is a favorable factor for achieving deep-sea long-range acoustic detection and communication. Analyzing and studying the physical mechanism of the sound propagation mode in the deep-sea convergence zone has always been the focus of research on the law of deep-sea sound propagation. Therefore, in practical applications, in order to better utilize the convergence effect of the sound field, it is necessary to obtain a fast and accurate method to determine the location of the convergence zone.

[0028] Based on ray theory analysis, the convergence zone is formed by the convergence of sound rays with different grazing angles emitted by the sound source at certain distances and depths. It is a high sound intensity area with a certain width range. Affected by the horizontal non-uniform distribution of the hydrological environment, as the sound propagation distance increases, the characteristic parameters of the convergence zone far from the sound source will have a cumulative change, which makes it difficult to determine the location of the convergence zone.

[0029] Through research, it is found that in the prior art, the position of the convergence zone is determined by calculating the spectrum of the propagation loss in the convergence zone. This method uses the position of the gain peak as the position of the convergence zone, which requires the selection of a suitable sound field model for calculation. Especially for the prediction of broadband sound propagation loss, the numerical calculation solution requires a relatively fine spatial grid division in order to ensure sufficient accuracy. There are problems such as large amount of calculation, long time, and inability to quickly obtain the position of the convergence zone.

[0030] Based on this, the embodiment of the present application provides a method for determining the position of a deep-sea convergence zone, by calculating the zero-degree angle sound line in a horizontally uniform hydrological environment, using the span of the zero-degree angle sound line and the critical angle sound line as the boundary of the sound field convergence zone, and using the span of the zero-degree angle sound line as the starting position of the convergence zone. This determination method is fast, simple and highly accurate, and only requires the sound source depth and the sound velocity profile to predict the starting position of the convergence zone, thereby achieving the purpose of reducing the amount of calculation and quickly predicting the position of the sound field convergence zone.

[0031] See also Figure 1 , Figure 1 This is a flow chart of a method for determining the location of a deep-sea convergence zone provided in an embodiment of the present application. It should be noted that the determination method provided in the embodiment of the present application is performed in a horizontally uniform hydrological environment, so the derivation of the following formula ignores the change in the sound velocity profile in the horizontal direction. Figure 1 As shown in , the determination method provided in the embodiment of the present application includes:

[0032] S101. Judging whether the target sea area meets necessary conditions for the emergence of a convergence zone according to the hydrological environment parameters of the target sea area.

[0033] Here, the hydrological environment parameters include the initial outgoing grazing angle of the sound line corresponding to the convergence zone, the sound source position in the target sea area and the sound speed at the seabed position. The hydrological environment parameters can be obtained by conducting hydrological measurement experiments on the target sea area.

[0034] For step S101, based on ray theory and Snell's refraction law:

[0035]

[0036] The critical sound line in the convergence zone has a grazing angle of 0 degrees at the inversion point. Substituting the above formula, we can get:

[0037]

[0038] Therefore, when it is determined that the hydrological environment parameters of the target sea area satisfy the following formula, it is judged that the target sea area meets the necessary conditions for the emergence of a convergence zone, and a large number of inverted sound lines may exist in the underwater acoustic channel:

[0039] 0<θ<cos -1 (c 0 / c H )

[0040] c 0 <c H

[0041] Where θ represents the initial outgoing grazing angle of the sound line corresponding to the convergence zone, c 0 and c H Respectively represent the sound speed at the sound source position and the seabed position in the target sea area.

[0042] S102: If satisfied, establish the sound velocity profile of the target sea area in each vertical layer and the sound line trajectory equation of the target sea area.

[0043] In this step, firstly, the vertical stratification characteristics of seawater media can be used, that is, the sound velocity profile c(z) is only related to the vertical depth z to establish a stratified medium model. The sound velocity profile changes linearly in each layer and is continuous between layers. Specifically, the formula for the sound velocity profile of the target sea area in each vertical layer is expressed as:

[0044] c(z)=a i +b i (zz i )

[0045] z i <z≤z i+1 , 1≤i≤N

[0046] Where c(z) represents the sound velocity profile, which is the sound velocity at depth z of each vertical layer; z i Indicates the position of each vertical layer; a i , b i Represents the coefficient for solving the speed of sound, specifically, a i =c(z i ), b i =[c(z i+1 )-c(z i )] / [z i+1 -z i ].

[0047] Furthermore, assuming that the initial outgoing grazing angle of the sound line is θ, the sound speed corresponding to the sound source position (sound source depth) is c0 , and define k 0 =ω / c 0 , then the sound trajectory equation of the target sea area can be established by Snell's refraction law as follows:

[0048]

[0049] Where k represents the wave vector; k(z) = ω / c(z), which represents the wave vector at different sound source depths; k 0 represents the wave vector at the sound source; ω represents the angular frequency, ω=2·pi·f, f represents the sound source frequency; dr and dz represent the step size in the horizontal distance and vertical depth direction respectively.

[0050] S103. In a horizontal uniform hydrological environment, based on the hydrological environment parameters and the sound ray trajectory equation, construct an expression for the sound ray span at a zero-degree exit angle.

[0051] The sound ray trajectory equation determines the specific path of the sound ray, and the sound ray span is the projection of this path in a specific direction. In practical applications, the path of the sound ray can be determined by solving the sound ray trajectory equation, and then the sound ray span can be calculated based on the geometry of the path. For example, if the sound ray trajectory is a curve, the projection length of the sound ray in a specific direction can be calculated by integration. Specifically, in an embodiment of the present application, in a horizontally uniform hydrological environment, the expression of the sound ray span at a zero-degree exit angle can be derived based on the sound ray trajectory equation:

[0052]

[0053] In the formula, R m represents the starting position of the convergence zone, m = 1, 2, 3, ... represents the convergence zone number, k(z) = ω / c(z), ξ 0 represents the horizontal wave number. When calculating, the sound source depth is placed on the z coordinate system, that is, the sound source depth z=0, then ξ 0 = k(0)cosθ = k 0 cosθ.

[0054] S104. Based on the sound velocity profile of the target sea area in each vertical layer and the expression of the sound line span at a zero-degree exit angle, the sound line span at a zero-degree exit angle is obtained and the sound line span at a zero-degree exit angle is determined as the convergence zone position of the target sea area.

[0055] In specific implementation, step S104 may include:

[0056] S1041. Determine the upper and lower limits of integration of the expression for the sound ray span at the zero-degree exit angle according to the sound source depth.

[0057] Here, the sound source depth can be set to the sea surface, z 1 As the sound source depth, z T Indicates the depth of the lower inversion point. The refraction angle of the lower inversion point is 0, and the sound speed at this point is equal to the sound speed of the sound source. Corresponding to k(z T ) = k 0 , and z n <z T ≤z n+1 .

[0058] S1042. According to the upper and lower limits of integration, the sound velocity profile of the target sea area in each vertical layer and the sound source depth are substituted into the expression of the sound line span at the zero-degree exit angle to determine the sound line span at the zero-degree exit angle.

[0059] See also Figure 2 , Figure 2 A sound line propagation path diagram provided in the embodiment of the present application. Figure 2 The reasons for determining the sound line span of zero-degree exit angle as the convergence zone position of the target sea area are specifically introduced.

[0060] Through research, the present application found that the ray theory can be used to intuitively analyze the sound line trajectory of sound propagation in the convergence zone, such as Figure 2 As shown in the figure, when the sound source is close to the sea surface, the 0-degree angle outgoing sound line emitted from the sound source is the most likely RR inverted sound line, and its position at the convergence zone is just between the position (horizontal) where the large-angle sound line inverts from the seabed and reaches the convergence zone, and the position (horizontal) where the upward sound line is reflected by the sea surface and then inverted through the seabed and reaches the convergence zone. Therefore, the position where the 0-degree angle outgoing sound line reaches the convergence zone is more accurate as the starting position of the convergence zone.

[0061] In addition, the location of the convergence zone is mainly determined by the depth of the sound source and the distribution of the sound velocity profile. The first convergence zone is closest to the sound source. Compared with the convergence zones of other numbers, it has the shortest propagation distance and is less affected by the uneven distribution of the hydrological environment. This results in the first convergence zone having the strongest sound intensity and a more concentrated distance distribution. The span of the zero-degree outgoing sound line can be used as the location of the first convergence zone.

[0062] Therefore, in combination with the above characteristics, when predicting the location of the sound field convergence zone alone, the embodiment of the present application provides a method for quickly predicting the location of the deep-sea convergence zone based on the zero-degree angle sound line trajectory, inputs the sound source depth and the sound velocity profile distribution, calculates the sound line span corresponding to the zero-degree angle, and approximates this span as the starting position of the convergence zone. Under the premise of using only the sound velocity profile of a certain area, this method can quickly and easily obtain the starting position of the convergence zone.

[0063] See also Figure 3 and Figure 4 , Figure 3 The actual sound velocity profile of a certain sea area provided in the embodiment of the present application is as follows: Figure 4 A comparison diagram of the convergence zone positions calculated by a parabolic approximation model method and a zero-degree sound ray method provided in an embodiment of the present application.

[0064] In an experiment, Figure 3 As shown in the figure, the measured sound velocity profile in a certain sea area constitutes a non-complete deep-sea sound channel. Among them, the sound channel axis is located at 1185m, and the sound velocity corresponding to this depth is 1484.7m / s. Considering the sound source depth of 200m, the sound velocity at this location is 1513.8m / s. The sound velocity at the lower inversion point must be equal to the sound velocity at the location of the sound source. According to the law of refraction, the depth of the lower inversion point is calculated to be 3247.5m.

[0065] Firstly, the measured sound velocity profile was used to verify that the sound velocity profile can form a complete sound propagation mode in the convergence zone. Then, the sound velocity profile was input into the calculation formula of the zero-degree angle sound line trajectory span, and the starting positions of the first three convergence zones in the 200Hz sound field can be quickly calculated to be 51.26km, 102.52km, and 153.78km, respectively.

[0066] In order to verify the feasibility of the rapid prediction method of the convergence zone position, the experiment uses the parabolic approximation model of the deep-sea acoustic field to calculate the acoustic propagation curve of the convergence zone with an acoustic field frequency of 200 Hz, as shown in Figure 4 As shown, at a receiving depth of 200m, the starting positions of the first three convergence areas of the 200Hz sound field are 51.41km, 104km, and 156.9km, respectively, and the position errors are 0.29%, 1.42%, and 1.99%, respectively, which are basically consistent with the starting positions of the convergence areas quickly calculated by the method provided in the embodiment of the present application.

[0067] A method for determining the position of a deep-sea convergence zone provided in an embodiment of the present application determines, based on the hydrological environmental parameters of the target sea area, whether the target sea area meets the necessary conditions for the appearance of a convergence zone; if so, the sound velocity profile of the target sea area in each vertical layer and the sound line trajectory equation of the target sea area are established; in a horizontally uniform hydrological environment, an expression for the sound line span at a zero-degree exit angle is constructed based on the hydrological environmental parameters and the sound line trajectory equation; based on the sound velocity profile of the target sea area in each vertical layer and the expression for the sound line span at a zero-degree exit angle, the sound line span at a zero-degree exit angle is obtained and the sound line span at a zero-degree exit angle is determined as the convergence zone position of the target sea area.

[0068] Thus, the determination method provided in the embodiment of the present application has the following beneficial effects:

[0069] On the one hand, this method only needs the sound velocity profile data, and based on the zero-degree angle outgoing sound line span calculation formula, the starting position of the convergence zone can be determined. Compared with the traditional numerical calculation method, it is not necessary to calculate the entire sound field distribution, and the setting of complex parameters and grid division are omitted. The calculation formula used in this invention is simple and clear, the calculation amount is small, and the calculation speed is fast.

[0070] On the other hand, this method uses the span of the zero-degree angle sound line as the starting position of the convergence zone, avoiding the interference of other types of sound line trajectories with different exit angles at the sound source, and does not need to consider the influence of the sound line reflected by the seabed and the sea surface. At the same time, it also reduces the influence of the uneven distribution of the hydrological environment of the upper water body. The starting position of the sound field convergence zone can be quickly predicted by only calculating the zero-degree angle sound line trajectory.

[0071] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of a device for determining the position of a deep-sea convergence zone provided in an embodiment of the present application. Figure 5 As shown in , the determining device 200 includes:

[0072] A judgment module 210 is used to judge whether the target sea area meets the necessary conditions for the emergence of a convergence zone according to the hydrological environment parameters of the target sea area;

[0073] The first building module 220 is used to establish the sound velocity profile of the target sea area in each vertical layer and the sound line trajectory equation of the target sea area when the necessary conditions for the convergence zone to appear are met;

[0074] The second construction module 230 is used to construct an expression of the sound line span at a zero-degree exit angle based on the hydrological environment parameters and the sound line trajectory equation in a horizontal uniform hydrological environment;

[0075] The determination module 240 is used to obtain the sound line span at zero degree exit angle based on the sound velocity profile of the target sea area in each vertical layer and the expression of the sound line span at zero degree exit angle, and determine the sound line span at zero degree exit angle as the convergence zone position of the target sea area.

[0076] Furthermore, when the judgment module 210 is used to judge whether the target sea area meets the necessary conditions for the emergence of a convergence zone according to the hydrological environment parameters of the target sea area, the judgment module 210 is used to:

[0077] When it is determined that the hydrological environment parameters of the target sea area satisfy the following formula, it is judged that the target sea area meets the necessary conditions for the emergence of a convergence zone:

[0078] 0<θ<cos -1 (c 0 / c H )

[0079] c 0 <c H

[0080] Where θ represents the initial outgoing grazing angle of the sound line corresponding to the convergence zone, c 0 and c H They respectively represent the sound speed at the sound source position and the sound speed at the seabed position in the target sea area.

[0081] Furthermore, the first construction module 220 establishes a formula for the sound velocity profile of the target sea area in each vertical layer as follows:

[0082] c(z)=a i +b i (zz i )

[0083] z i <z≤z i+1 , 1≤i≤N

[0084] Among them, z i Indicates the position of each vertical layer, a i =c(z i ), b i =[c(z i+1 )-c(z i )] / [z i+1 -z i ].

[0085] Furthermore, the first construction module 220 establishes the sound trajectory equation of the target sea area as follows:

[0086]

[0087] In the formula, k 0 =ω / c 0 ; k(z) = ω / c(z); k(z) represents the wave vector, k 0 The wave vector represents the position of the sound source; ω represents the angular frequency; dr and dz represent the step size in the horizontal distance and vertical depth directions, respectively.

[0088] Furthermore, in a horizontally uniform hydrological environment, the expression for the sound line span at a zero-degree exit angle is expressed as:

[0089]

[0090] In the formula, R m represents the starting position of the convergence zone, m = 1, 2, 3, ... represents the convergence zone number, k(z) = ω / c(z), ξ 0 represents the horizontal wave number, ξ 0= k(0)cosθ = k 0 cosθ.

[0091] Further, when the determination module 240 is used to obtain the sound line span at a zero-degree exit angle based on the sound velocity profile of the target sea area in each vertical layer, the sound line trajectory equation, and the expression of the sound line span at a zero-degree exit angle, the determination module 240 is used to:

[0092] Determine the integral upper limit and the integral lower limit of the expression of the sound line span at the zero-degree exit angle according to the sound source depth;

[0093] According to the upper and lower limits of integration, the sound velocity profile of the target sea area in each vertical layer and the sound source depth are substituted into the expression of the sound line span at the zero-degree exit angle to determine the sound line span at the zero-degree exit angle.

[0094] Further, when the determination module 240 is used to determine the integral upper limit and the integral lower limit of the expression of the sound line span of the zero-degree exit angle according to the sound source depth, the determination module 240 is used to:

[0095] Set the sound source depth to the sea surface, z 1 As the sound source depth, z T Indicates the depth of the lower inversion point. The refraction angle of the lower inversion point is 0, and the sound speed at this point is equal to the sound speed of the sound source. Corresponding to k(z T ) = k 0 , and z n <z T ≤z n+1 .

[0096] See also Figure 6 , Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 6 As shown in , the electronic device 400 includes a processor 410 , a memory 420 and a bus 430 .

[0097] The memory 420 stores machine-readable instructions executable by the processor 410. When the electronic device 400 is running, the processor 410 communicates with the memory 420 via the bus 430. When the machine-readable instructions are executed by the processor 410, the above-mentioned Figure 1 The steps of a method for determining the position of a deep-sea convergence zone in the method embodiment shown are specifically implemented in accordance with the method embodiment and will not be described in detail here.

[0098] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 1 The steps of a method for determining the position of a deep-sea convergence zone in the method embodiment shown are specifically implemented in accordance with the method embodiment and will not be described in detail here.

[0099] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0100] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0101] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0102] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application can essentially be embodied in the form of a software product, or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0103] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for determining the location of a deep-sea convergence zone, characterized in that: The determination method comprises: According to the hydrological environment parameters of the target sea area, judging whether the target sea area meets the necessary conditions for the emergence of a convergence zone; If satisfied, then establish the sound velocity profile of the target sea area in each vertical layer and the sound line trajectory equation of the target sea area; In a horizontal uniform hydrological environment, based on the hydrological environment parameters and the sound line trajectory equation, construct an expression for the sound line span at a zero-degree exit angle; Based on the sound velocity profile of the target sea area in each vertical layer and the expression of the sound line span at a zero-degree exit angle, the sound line span at a zero-degree exit angle is obtained and the sound line span at a zero-degree exit angle is determined as the convergence zone position of the target sea area.

2. The determination method according to claim 1, characterized in that: According to the hydrological environment parameters of the target sea area, it is judged whether the target sea area meets the necessary conditions for the emergence of the convergence zone, including: When it is determined that the hydrological environment parameters of the target sea area satisfy the following formula, it is judged that the target sea area meets the necessary conditions for the emergence of a convergence zone: 0<θ<cos -1 (c0 / c H ) c0<c H Where θ represents the initial outgoing grazing angle of the sound line corresponding to the convergence zone, c0 and c H They respectively represent the sound speed at the sound source position and the sound speed at the seabed position in the target sea area.

3. The determination method according to claim 2, characterized in that: The formula for establishing the sound velocity profile of the target sea area in each vertical layer is expressed as: c(z)=a i +b i (z-z i ) With i <z≤z i+1 ,1≤i≤N Among them, z i Indicates the position of each vertical layer, a i =c(z i ), b i =[c(z i+1 )-c(z i )] / [z i+1 -z i ].

4. The determination method according to claim 3, characterized in that: The formula for establishing the sound trajectory equation of the target sea area is expressed as: Wherein, k0=ω / c0; k(z)=ω / c(z); k(z) represents the wave vector, k0 represents the wave vector at the sound source position; ω represents the angular frequency; dr and dz represent the step size in the horizontal distance and vertical depth directions, respectively.

5. The determination method according to claim 4, characterized in that: In a horizontally uniform hydrological environment, the expression for the sound line span at a zero-degree exit angle is: In the formula, R m represents the starting position of the convergence zone, m=1,2,3,... represents the convergence zone number, ξ0 represents the horizontal wave number, ξ0=k(0)cosθ=k0cosθ.

6. The determination method according to claim 5, characterized in that: Based on the sound velocity profile of the target sea area in each vertical layer, the sound line trajectory equation and the expression of the sound line span at a zero-degree exit angle, the sound line span at a zero-degree exit angle is obtained, including: Determine the upper and lower limits of the integral of the expression for the span of the sound line at the zero-degree exit angle according to the sound source depth; According to the upper and lower limits of integration, the sound velocity profile of the target sea area in each vertical layer and the sound source depth are substituted into the expression of the sound line span at the zero-degree exit angle to determine the sound line span at the zero-degree exit angle.

7. The determination method according to claim 6, characterized in that: The integral upper limit and the integral lower limit of the expression of the sound line span of the zero-degree exit angle are determined according to the sound source depth, including: setting the sound source depth at the sea surface, z1 as the sound source depth, z T Indicates the depth of the lower inversion point. The refraction angle of the lower inversion point is 0, and the sound speed at this point is equal to the sound speed of the sound source. Corresponding to k(z T )=k0,and z n <z T ≤z n+1 .

8. A device for determining the position of a deep-sea convergence zone, characterized in that: The determining device comprises: A judgment module, used to judge whether the target sea area meets the necessary conditions for the emergence of a convergence zone according to the hydrological environment parameters of the target sea area; The first building module is used to establish the sound velocity profile of the target sea area in each vertical layer and the sound line trajectory equation of the target sea area when the necessary conditions for the convergence zone to appear are met; A second construction module is used to construct an expression of the sound line span at a zero-degree exit angle based on the hydrological environment parameters and the sound line trajectory equation in a horizontal uniform hydrological environment; A determination module is used to obtain the sound line span at a zero-degree exit angle based on the sound velocity profile of the target sea area in each vertical layer and the expression of the sound line span at a zero-degree exit angle, and determine the sound line span at a zero-degree exit angle as the convergence zone position of the target sea area.

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and the machine-readable instructions are executed by the processor to execute the steps of a method for determining the position of a deep-sea convergence zone as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for determining the position of a deep-sea convergence zone as claimed in any one of claims 1 to 7 are executed.

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