Target radiation noise directivity measurement method and device based on volume array

Abstract

The present invention provides a method and device for measuring the directivity of target radiation noise based on a volume array, and relates to the technical field of target radiation noise measurement. The method comprises: obtaining an initial array element index of a volume array; reducing the primitive elements of a conical array in the volume array based on the initial array element index, and obtaining a first source level when the source level meets a preset condition; reducing the primitive elements of a cylindrical array and the number of arrays of a cylindrical array in the volume array based on the initial array element index, and obtaining a second source level when the source level meets a preset condition; determining the directivity of the radiation noise level of the target to be measured based on the first source level and the second source level. The method and device for measuring the directivity of target radiation noise based on a volume array provided by the present invention can automatically extract primitive elements according to the change of the source level, thereby changing the effective aperture of the array in real time, achieving effective measurement of the directivity of the target radiation noise level under various conditions, and improving the accuracy of the measurement.

Description

Technical Field

[0001] The present invention relates to the technical field of target radiation noise measurement, and in particular to a method and device for measuring the directivity of target radiation noise based on a volume array. Background Art

[0002] Noise measurement technology is the basis of vibration and noise reduction technology. For submarines, in order to avoid being detected by sonar, it is necessary to understand their own radiation noise characteristics and take corresponding vibration and noise reduction measures. Therefore, radiation noise measurement is an indispensable performance evaluation method in its development process. However, with the development of vibration and noise reduction technology and the continuous improvement of marine environmental noise level, the level of submarine radiation noise is getting lower and lower, and it is becoming more and more difficult to effectively measure the wide-band range of underwater target radiation noise.

[0003] For this reason, the measurement of target radiation noise is constantly developing in the direction of multi-array combination and 3D array in the design of measurement array, and the corresponding signal processing will become more and more complicated. In the process of directivity measurement, the most important thing is to measure the accuracy of source level. The premise of accurate source level measurement is that the beam width can achieve coverage of the main radiation noise area of ​​the target. Under the premise of ensuring that the main radiation noise area of ​​the target can be covered, the narrower the main lobe width, the better, so that the noise outside the main lobe width can be suppressed to the greatest extent. The problem encountered in actual measurement is that the distance between the target and the volume array is different at different times under different routes, and the main lobe width required at different distances is different. The main lobe width required for a long distance is narrow, and the main lobe width required for a short distance is wide. If the main lobe width required for a fixed distance is designed, then when the distance is less than this, the beam width cannot completely cover the main energy, and the measured source level will be small. When the distance is greater than this, due to the wide beam width and high side lobes, the ability to suppress noise interference is insufficient, and the array gain decreases. Summary of the invention

[0004] The present invention provides a method and device for measuring the directivity of target radiation noise based on a volume array, which solves the problem of low accuracy in the prior art when using a volume array to measure the directivity of target radiation noise.

[0005] The present invention provides a method for measuring the directivity of target radiation noise based on a volume array, comprising:

[0006] Get the initial element index of the volume array;

[0007] Reducing primitives of the cone array in the volume array based on the initial array element index, and obtaining a first source level when the source level meets a preset condition;

[0008] Based on the initial array element index, the number of primitives of the cylindrical array and the array of the cylindrical array in the volume array is reduced, and a second source level is obtained when the source level meets a preset condition;

[0009] The directivity of the radiation noise level of the target to be measured is determined based on the first source level and the second source level.

[0010] In some embodiments, reducing the primitives of the cone array in the volume array based on the initial array element index and obtaining a first source level when the source level meets a preset condition includes:

[0011] Based on the initial array element index, one or more primitives at the beginning and end of each array in the cone array are reduced each time to obtain a reduced array element index;

[0012] Determining a source level each time based on the reduced array element index;

[0013] When the change range of the two source levels is less than a preset threshold, the current source level is determined to be the first source level.

[0014] In some embodiments, reducing the number of primitives and arrays of cylindrical arrays in the volume array based on the initial array element index, and obtaining a second source level when the source level meets a preset condition, includes:

[0015] Based on the initial array element index, one or more primitives at the beginning and end of each array in the cylindrical array are reduced each time to obtain a reduced array element index;

[0016] Determining a source level each time based on the reduced array element index;

[0017] When the range of the source level changes twice before and after is less than the preset threshold, the number of arrays is further reduced to obtain the array element index after the number of arrays is reduced;

[0018] Determining the source level each time based on the array element index after the number of array elements is reduced;

[0019] When the change range of the two source levels is less than a preset threshold, the current source level is determined to be the second source level.

[0020] In some embodiments, reducing the number of arrays includes:

[0021] Remove two arrays at both ends of the diameter of the circle in the cylindrical array;

[0022] Remove two arrays with bilaterally symmetrical circle diameters from the cylindrical array;

[0023] Remove the two arrays at symmetrical positions of the two arrays about the circle in the cylindrical array.

[0024] In some embodiments, the method further comprises:

[0025] The distance and orientation between the volume array and the target to be measured are acquired based on the positioning information of the target to be measured.

[0026] In some embodiments, determining the directivity of the radiation noise level of the target to be measured based on the first source level and the second source level includes:

[0027] Determine a sound source level variation polar coordinate curve based on the first source level, the second source level, and the distance and orientation between the volume array and the target to be measured;

[0028] The directivity of the radiated noise level of the target to be measured is determined based on the sound source level change polar coordinate curve.

[0029] The present invention also provides a target radiation noise directivity measurement device based on a volume array, comprising the following modules:

[0030] A first acquisition module, used for acquiring an initial array element index of a volume array;

[0031] A first processing module, configured to reduce primitives of the cone array in the volume array based on the initial array element index, and obtain a first source level when the source level meets a preset condition;

[0032] A second processing module, configured to reduce the number of primitives of the cylindrical array and the array of the cylindrical array in the volume array based on the initial array element index, and obtain a second source level when the source level meets a preset condition;

[0033] The first determining module is used to determine the directivity of the radiation noise level of the target to be measured based on the first source level and the second source level.

[0034] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, any of the above-mentioned methods for measuring the directivity of target radiation noise based on a volume array is implemented.

[0035] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for measuring the directivity of target radiation noise based on a volume array as described above is implemented.

[0036] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements any of the above-mentioned methods for measuring the directivity of target radiation noise based on a volume array.

[0037] The target radiation noise directivity measurement method and device based on volume array provided by the present invention can automatically extract primitives according to the change of source level, thereby changing the effective aperture of the array in real time, achieving effective measurement of the directivity of the target radiation noise level under various conditions and improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 It is a flow chart of the target radiation noise directivity measurement method based on volume array provided by the present invention.

[0040] Figure 2 It is a schematic diagram of the structure of the volume array provided by the present invention.

[0041] Figure 3 The invention provides a horizontal directional route design diagram of a target to be measured.

[0042] Figure 4 It is a structural schematic diagram of a target radiation noise directivity measurement device based on a volume array provided by the present invention.

[0043] Figure 5 It is a schematic diagram of the physical structure of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Figure 1 FIG. 1 is a flow chart of a method for measuring the directivity of target radiation noise based on a volume array provided by the present invention. Figure 1 As shown, the method includes the following:

[0046] Step 101: Obtain an initial array element index of a volume array.

[0047] Specifically, after the volume array is laid out, the position of the volume array is marked and compared. The initial array element index is the initial array element index corresponding to the design array element under different narrowbands of the nested array. The initial array element index can be shown in Table 1 below.

[0048] Table 1. Initial array element index example

[0049]

[0050] Further, Figure 2 is a schematic diagram of the structure of the volume array provided by the present invention, such as Figure 2 As shown in the figure, the central area of ​​the volume array is a double cone array, which consists of 18 linear arrays, each of which contains 32 hydrophones (a total of 576). The diameter of the double cone array is 3m, and the total height is about 7.32m. A cylindrical array is designed outside the double cone array. The spacing between the cylindrical arrays is designed according to 0.75m, that is, the half wavelength of 1000Hz. The diameter of the cylindrical array is 3m, the height is about 9m, and it consists of 12 linear arrays, each of which contains 13 hydrophones (a total of 156).

[0051] The directivity of the target radiated noise level refers to the relationship between the radiated noise level and the side angle measured at an equal distance from a certain reference point of the target. When the target is sailing underwater, it forms a radiated noise field distributed in time and space. During the actual boat navigation test, the positioning technology of the equivalent acoustic center of the target radiated noise is applied to determine the equivalent acoustic center of the target in a certain working condition of navigation, and use it as a reference point for measuring the directivity of the target radiated noise level in the same working condition.

[0052] Figure 3 The horizontal directional route design diagram of the target to be measured provided by the present invention is as follows: Figure 3 As shown, the target acoustic center of route 1 is about 50m~100m away from the volume array, and the target starboard directivity can be measured; route 2 sails directly against the volume array to measure the bow directivity; route 3 sails away from the volume array to measure the stern directivity; route 4 The target acoustic center is about 50m~100m away from the volume array, and the target port directivity can be measured; route 5 sails directly against the volume array to measure the bow directivity; route 6 sails away from the volume array to measure the stern directivity. During the transition from route 2 to route 3 and the adjustment from route 5 to route 6, some directions that cannot be covered by route 1 and route 4 can be supplemented. Since there is a safety depth difference of 15m between the volume array and the target, the safety of the target navigation can be guaranteed during the directivity measurement. The safety of staggered depth navigation has been verified in the acoustic holographic array test system built by the user unit.

[0053] Step 102: reducing primitives of the cone array in the volume array based on the initial array element index, and obtaining a first source level when the source level meets a preset condition.

[0054] Specifically, for the processing frequency band of the conical array of 1kHz-8kHz, in order to make the main lobe width cover the main radiation noise area, the horizontal and vertical beam widths can be changed simultaneously by reducing the primitives in the conical array. The source level is calculated by obtaining a new index by reducing the primitives in the conical array, and the first source level is obtained when the source level meets the preset conditions.

[0055] The preset condition may mean that in the process of gradually reducing the primitives in the cone array, the source levels twice before and after remain unchanged or the source level changes within a certain tolerance, that is, when the source level changes within a certain range, the current source level is determined to be the first source level.

[0056] Step 103 : reducing the number of primitives of the cylindrical array and the array of the cylindrical array in the volume array based on the initial array element index, and obtaining a second source level when the source level meets a preset condition.

[0057] Specifically, for the processing frequency band of the cylindrical array of 250Hz-1kHz, the vertical beam width can be changed by first reducing the elements of the cylindrical array so that the vertical beam width can cover the main radiation noise area, and then the horizontal beam width can be changed by reducing the number of cylindrical arrays so that the horizontal beam width can cover the main radiation noise area.

[0058] Furthermore, the vertical beam width is changed by reducing the primitives of the cylindrical array, a new array element index is obtained after reducing the primitives of the cylindrical array and the source level is calculated, and when the source level meets the preset conditions, the number of arrays of the cylindrical array is reduced again to obtain a new array element index and calculate the source level, and when the source level meets the preset conditions, a second source level is obtained.

[0059] The preset condition may refer to determining the current source level as the second source level when the two previous source levels remain unchanged or the source level changes within a certain tolerance, that is, when the source level changes within a certain range.

[0060] Step 104: determining the directivity of the radiation noise level of the target to be measured based on the first source level and the second source level.

[0061] Specifically, the array element index is searched at different distances and orientations to obtain the corresponding first source level and second source level, and the polar coordinate curves of the sound source level changes at different angles are drawn to obtain the directivity of the radiated noise level of the target to be measured.

[0062] The target radiation noise directivity measurement method based on volume array provided by the present invention can automatically extract primitives according to the change of source level, thereby changing the effective aperture of the array in real time, achieving effective measurement of the directivity of the target radiation noise level under various conditions and improving the measurement accuracy.

[0063] In some embodiments, the method further includes: acquiring the distance and orientation between the volume array and the target to be measured based on the positioning information of the target to be measured.

[0064] Specifically, the target to be measured can navigate according to the above-mentioned directional route design diagram, and the distance and direction between the volume array and the target to be measured at different times are calculated according to the navigation and positioning information of the target to be measured.

[0065] Furthermore, the distances may be sorted from largest to smallest.

[0066] The target radiation noise directivity measurement method and device based on volume array provided by the present invention can obtain the distance and azimuth between the volume array and the target to be measured at different times, providing a basis for subsequent measurement of the radiation noise level directivity of the target to be measured, and sorting the distances from large to small can enable subsequent searches to be performed on the basis of the previous distance, thereby improving calculation efficiency.

[0067] In some embodiments, reducing the primitives of the cone array in the volume array based on the initial array element index and obtaining the first source level when the source level meets a preset condition includes: reducing one or more primitives at the beginning and end of each array in the cone array each time based on the initial array element index to obtain a reduced array element index; determining the source level each time based on the reduced array element index; and determining the current source level to be the first source level when the range of change of the source levels between two consecutive source levels is less than a preset threshold.

[0068] Specifically, for the processing frequency band of the conical array of 1kHz-8kHz, by reducing one or more primitives at the head and tail of each array in the conical array (since the height direction and horizontal diameter are both reduced, the horizontal and vertical beam widths can be changed at the same time), the reduced array element index can be obtained, and the source level can be calculated using the reduced array element index.

[0069] If the source level becomes larger, it means that the previous main lobe width is not enough, then continue to reduce the primitives at the beginning and end of each array in the conical array until the source level remains unchanged or the source level changes within a certain tolerance, for example, the source level changes within 0.5dB, indicating that the main lobe width has achieved coverage of the main radiation noise area, and this source level is the first source level.

[0070] The target radiation noise directivity measurement method based on volume array provided by the present invention can automatically extract primitives according to the change of source level, without the need for prior information on target size, and realize real-time automatic adaptation of the main lobe width, thereby changing the effective aperture of the array in real time, achieving effective measurement of the directivity of the target radiation noise level under various conditions, and improving the accuracy of the measurement.

[0071] In some embodiments, reducing the number of primitives of the cylindrical array and the number of arrays of the cylindrical array in the volume array based on the initial array element index, and obtaining the second source level when the source level meets a preset condition, includes: reducing one or more primitives at the head and tail of each array in the cylindrical array each time based on the initial array element index to obtain a reduced array element index; determining the source level each time based on the reduced array element index; when the range of change of the source levels twice before and after is less than a preset threshold, continuing to reduce the number of arrays to obtain an array element index after the number of arrays is reduced; determining the source level each time based on the array element index after the number of arrays is reduced; when the range of change of the source levels twice before and after is less than a preset threshold, determining the current source level to be the second source level.

[0072] Specifically, for the processing frequency band of the cylindrical array of 250Hz-1kHz, first change the vertical beam width, remove one element at the beginning and end of each array each time to obtain a new index (since the height direction is getting smaller, the vertical beam width can be changed), and use the new index to calculate the source level. Repeat until the source level twice before and after is unchanged or within a certain tolerance, such as 0.5dB, it is considered that the vertical beam width has achieved coverage of the main radiation noise area. Continue to reduce the number of arrays to obtain a new index (since the circle diameter is getting smaller, the horizontal beam width can be changed), and use the new index to calculate the source level. Until the source level twice before and after is unchanged or within a certain tolerance, it is considered that the horizontal beam width has achieved coverage of the main radiation noise area, and the second source level is output.

[0073] The target radiation noise directivity measurement method based on volume array provided by the present invention can automatically extract primitives according to the change of source level, without the need for prior information on target size, and realize real-time automatic adaptation of the main lobe width, thereby changing the effective aperture of the array in real time, achieving effective measurement of the directivity of the target radiation noise level under various conditions, and improving the accuracy of the measurement.

[0074] In some embodiments, reducing the number of arrays includes: removing two arrays at both ends of the diameter of the circle in the cylindrical array; removing two arrays that are symmetrical about the diameter of the circle in the cylindrical array; and removing two arrays that are symmetrically positioned about the circle in the cylindrical array.

[0075] Specifically, the number of arrays can be reduced by first removing two arrays at both ends of the circle diameter, and then successively removing two arrays that are symmetrical about the diameter, and two arrays at circularly symmetrical positions of the two arrays, and so on.

[0076] The target radiation noise directivity measurement method based on volume array provided by the present invention can automatically extract primitives according to the change of source level, without the need for prior information on target size, and realize real-time automatic adaptation of the main lobe width, thereby changing the effective aperture of the array in real time, achieving effective measurement of the directivity of the target radiation noise level under various conditions, and improving the accuracy of the measurement.

[0077] In some embodiments, determining the directivity of the radiated noise level of the target to be measured based on the first source level and the second source level includes: determining a polar coordinate curve of sound source level changes based on the first source level, the second source level, and the distance and orientation between the volume array and the target to be measured; and determining the directivity of the radiated noise level of the target to be measured based on the polar coordinate curve of sound source level changes.

[0078] Specifically, the array element index is searched at different distances and orientations to obtain the corresponding first source level and second source level, and the polar coordinate curves of the sound source level changes at different angles are drawn to obtain the directivity of the radiated noise level of the target to be measured.

[0079] The target radiation noise directivity measurement method based on volume array provided by the present invention does not need to give a required main lobe width input, and can simultaneously realize horizontal and vertical beam width adaptation, thereby achieving effective measurement of the horizontal directivity of the target radiation noise under various conditions and improving the measurement accuracy.

[0080] Figure 4 FIG. 1 is a schematic diagram of the structure of a target radiation noise directivity measurement device based on a volume array provided by the present invention. Figure 4 As shown, the target radiation noise directivity measurement device based on the volume array provided in the embodiment of the present application includes a first acquisition module 401, a first processing module 402, a second processing module 403 and a first determination module 404, wherein: the first acquisition module 401 is used to obtain the initial array element index of the volume array; the first processing module 402 is used to reduce the primitives of the conical array in the volume array based on the initial array element index, and obtain the first source level when the source level meets the preset conditions; the second processing module 403 is used to reduce the primitives of the cylindrical array and the number of arrays of the cylindrical array in the volume array based on the initial array element index, and obtain the second source level when the source level meets the preset conditions; the first determination module 404 is used to determine the radiation noise level directivity of the target to be measured based on the first source level and the second source level.

[0081] Specifically, the above-mentioned volume array-based target radiation noise directivity measurement device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned volume array-based target radiation noise directivity measurement method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0082] Figure 5 is a schematic diagram of the physical structure of the electronic device provided by the present invention, such as Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530 and a communication bus 540, wherein the processor 510, the communication interface 520 and the memory 530 communicate with each other through the communication bus 540. The processor 510 may call the logic instructions in the memory 530 to execute a target radiation noise directivity measurement method based on a volume array, the method comprising: obtaining an initial array element index of the volume array; reducing the primitive elements of the cone array in the volume array based on the initial array element index, and obtaining a first source level when the source level meets a preset condition; reducing the primitive elements of the cylindrical array and the number of arrays of the cylindrical array in the volume array based on the initial array element index, and obtaining a second source level when the source level meets a preset condition;

[0083] The directivity of the radiation noise level of the target to be measured is determined based on the first source level and the second source level.

[0084] In addition, the logic instructions in the above-mentioned memory 530 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of 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 invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0085] On the other hand, the present invention also provides a computer program product, which includes a computer program, and the computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the target radiation noise directivity measurement method based on the volume array provided by the above-mentioned methods, and the method includes: obtaining an initial array element index of the volume array; reducing the primitive elements of the conical array in the volume array based on the initial array element index, and obtaining a first source level when the source level meets a preset condition; reducing the primitive elements of the cylindrical array and the number of arrays of the cylindrical array in the volume array based on the initial array element index, and obtaining a second source level when the source level meets a preset condition; and determining the radiation noise level directivity of the target to be measured based on the first source level and the second source level.

[0086] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the target radiation noise directivity measurement method based on the volume array provided by the above-mentioned methods, the method comprising: obtaining an initial array element index of the volume array; reducing the primitive elements of the conical array in the volume array based on the initial array element index, and obtaining a first source level when the source level meets a preset condition; reducing the primitive elements of the cylindrical array and the number of arrays of the cylindrical array in the volume array based on the initial array element index, and obtaining a second source level when the source level meets a preset condition; and determining the radiation noise level directivity of the target to be measured based on the first source level and the second source level.

[0087] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0088] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for measuring the directivity of target radiation noise based on a volume array, characterized in that: include: Acquire an initial array element index of a volume array, wherein the volume array is composed of a double cone array located in a central area and a cylindrical array outside the double cone array; Reducing primitives of the cone array in the volume array based on the initial array element index, and obtaining a first source level when the source level meets a preset condition; Based on the initial array element index, the number of primitives of the cylindrical array and the array of the cylindrical array in the volume array is reduced, and a second source level is obtained when the source level meets a preset condition; The directivity of the radiation noise level of the target to be measured is determined based on the first source level and the second source level.

2. The method for measuring the directivity of target radiation noise based on volume array according to claim 1, characterized in that: The reducing the primitives of the cone array in the volume array based on the initial array element index and obtaining the first source level when the source level meets a preset condition includes: Based on the initial array element index, one or more primitives at the beginning and end of each array in the cone array are reduced each time to obtain a reduced array element index; Determining a source level each time based on the reduced array element index; When the change range of the two source levels is less than a preset threshold, the current source level is determined to be the first source level.

3. The method for measuring the directivity of target radiation noise based on volume array according to claim 1, characterized in that: The reducing the number of primitives and arrays of the cylindrical array in the volume array based on the initial array element index, and obtaining a second source level when the source level meets a preset condition, includes: Based on the initial array element index, one or more primitives at the beginning and end of each array in the cylindrical array are reduced each time to obtain a reduced array element index; Determining each source level based on the reduced array element index; When the range of the source level changes twice before and after is less than the preset threshold, the number of arrays is further reduced to obtain the array element index after the number of arrays is reduced; Determine the source level each time based on the array element index after the array number is reduced; When the change range of the two source levels is less than a preset threshold, the current source level is determined to be the second source level.

4. The method for measuring the directivity of target radiation noise based on volume array according to claim 3, characterized in that: The reducing the number of arrays comprises: Remove two arrays at both ends of the diameter of the circle in the cylindrical array; Remove two arrays with bilaterally symmetrical circle diameters from the cylindrical array; Remove the two arrays at symmetrical positions of the two arrays about the circle in the cylindrical array.

5. The method for measuring the directivity of target radiation noise based on volume array according to claim 1, characterized in that: The method further comprises: The distance and orientation between the volume array and the target to be measured are acquired based on the positioning information of the target to be measured.

6. The method for measuring the directivity of target radiation noise based on volume array according to claim 5, characterized in that: The determining the radiation noise level directivity of the target to be measured based on the first source level and the second source level includes: Determine a sound source level change polar coordinate curve based on the first source level, the second source level, and the distance and orientation between the volume array and the target to be measured; The directivity of the radiated noise level of the target to be measured is determined based on the sound source level change polar coordinate curve.

7. A target radiation noise directivity measurement device based on a volume array, characterized in that: include: A first acquisition module is used to acquire an initial array element index of a volume array, wherein the volume array is composed of a double cone array located in a central area and a cylindrical array outside the double cone array; A first processing module, configured to reduce primitives of the cone array in the volume array based on the initial array element index, and obtain a first source level when the source level meets a preset condition; A second processing module, configured to reduce the number of primitives of the cylindrical array and the array of the cylindrical array in the volume array based on the initial array element index, and obtain a second source level when the source level meets a preset condition; The first determining module is used to determine the directivity of the radiation noise level of the target to be measured based on the first source level and the second source level.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the target radiation noise directivity measurement method based on volume array is implemented as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the target radiation noise directivity measurement method based on a volume array as claimed in any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the target radiation noise directivity measurement method based on a volume array as claimed in any one of claims 1 to 6 is implemented.

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