Vehicle sound source strength testing method, device and electronic equipment

Abstract

The present invention discloses a source intensity test method, device and electronic equipment for a vehicle sound source. The method comprises: obtaining the center point position of the vehicle sound source and the noise value corresponding to the vehicle sound source; determining the distance between the vehicle sound source and a sound source detection point according to the center point position of the vehicle sound source; determining the target sound transfer function according to the distance between the vehicle sound source and the sound source detection point; and determining the source intensity corresponding to the vehicle sound source according to the target sound transfer function and the noise value corresponding to the vehicle sound source. By determining the center point position of the vehicle sound source, the present invention can obtain the distance between the vehicle sound source and the sound source detection point, and then determine the sound transfer function corresponding to the vehicle sound source, so that the sound propagation characteristics and energy transfer theory can be used in combination with the obtained noise value corresponding to the vehicle sound source to determine the source intensity corresponding to the vehicle sound source, which can not only reduce the influence of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a source intensity testing method, device and electronic equipment for a vehicle sound source. Background Art

[0002] With the acceleration of urbanization and the rapid growth of motor vehicle ownership, motor vehicle noise has become the main source of urban environmental noise pollution, which has a significant impact on the quality of life of residents and the quality of the urban environment. At present, the assessment of motor vehicle noise pollution mainly relies on far-field pass-by noise testing, but this method is easily affected by surrounding environmental factors, and the test conditions are relatively fixed, which may cause misjudgment of motor vehicle noise pollution and cannot accurately identify the noise level of the motor vehicle itself, limiting the pertinence and effectiveness of noise control measures.

[0003] To solve the above problems, in the prior art, motor vehicle noise testing can be carried out in an anechoic chamber or a specific acoustic environment. Although such testing provides relatively accurate results, it is costly and has a complicated operating process, making it difficult to apply directly on site. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to propose a source strength test method for a vehicle sound source, which is based on the defined center point position of the vehicle sound source and the measured distance between the vehicle sound source and the sound source detection point, and then the sound transfer function from the vehicle sound source to the sound source detection point can be obtained, so that the sound propagation characteristics and energy transfer theory can be used, combined with the noise value measured at the sound source detection point, to determine the source strength corresponding to the vehicle sound source, which can not only reduce the influence of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance.

[0005] To this end, a second object of the present invention is to provide a source intensity testing device for a vehicle sound source.

[0006] To this end, a third object of the present invention is to provide an electronic device.

[0007] To this end, a fourth object of the present invention is to provide a computer-readable storage medium.

[0008] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention discloses a source intensity testing method for a vehicle sound source, the method comprising: determining the center point position of the vehicle sound source and the noise value corresponding to the vehicle sound source; determining the distance between the vehicle sound source and a sound source detection point according to the center point position of the vehicle sound source; determining a target sound transfer function according to the distance between the vehicle sound source and the sound source detection point; and determining the source intensity corresponding to the vehicle sound source according to the target sound transfer function and the noise value corresponding to the vehicle sound source.

[0009] According to the source strength test method of the vehicle sound source of the embodiment of the present invention, by determining the center point position of the vehicle sound source, the distance between the vehicle sound source and the sound source detection point can be obtained, and then the sound transfer function from the vehicle sound source to the sound source detection point can be determined, so that the sound propagation characteristics and energy transfer theory can be used, combined with the noise value measured at the sound source detection point, to determine the source strength corresponding to the vehicle sound source, which can not only reduce the influence of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance.

[0010] In addition, the source intensity testing method of the vehicle sound source according to the above embodiment of the present invention may also have the following additional technical features:

[0011] In some examples, when obtaining the center point position of the vehicle sound source, it includes: obtaining the midpoint position of the line between the left front wheel and the left rear wheel, or the right front wheel and the right rear wheel of the vehicle, and the height of the vehicle at the midpoint position; determining the center point position of the vehicle sound source according to the midpoint position and the height of the vehicle at the midpoint position.

[0012] In some examples, before determining the target sound transfer function based on the distance between the vehicle sound source and the sound source detection point, it also includes: selecting different preset sound sources located at different center points; obtaining the first distances between different preset sound sources and the sound source detection point; determining the sound transfer functions corresponding to the different first distances; and constructing a sound transfer function database based on the correspondence between the first distances corresponding to different preset sound sources and the sound transfer functions.

[0013] In some examples, when determining the target sound transfer function based on the distance between the vehicle sound source and the sound source detection point, it includes: matching the corresponding target sound transfer function from the sound transfer function database based on the distance between the vehicle sound source and the sound source detection point.

[0014] In some examples, after determining the target sound transfer function based on the distance between the vehicle sound source and the sound source detection point, it also includes: obtaining a distance correction value between the vehicle sound source and the sound source detection point and a humidity correction value in the environment where the vehicle sound source is located; correcting the target sound transfer function based on the distance correction value and the humidity correction value; and determining the source intensity corresponding to the vehicle sound source based on the corrected target sound transfer function and the noise value corresponding to the vehicle sound source.

[0015] In some examples, obtaining the distance correction value between the vehicle sound source and the sound source detection point includes: obtaining a second distance between the center line of the lane where the vehicle sound source is located and the sound source detection point; and determining the distance correction value based on the difference between the distance between the vehicle sound source and the sound source detection point and the second distance.

[0016] In some examples, when obtaining the humidity correction value of the environment in which the vehicle sound source is located, it includes: obtaining the humidity value and a preset humidity value of the environment in which the vehicle sound source is located; and determining the humidity correction value based on the humidity value and the preset humidity value.

[0017] In some examples, when determining the source intensity corresponding to the vehicle sound source according to the modified target sound transfer function and the noise value corresponding to the vehicle sound source, the specific formula is:

[0018] ;

[0019] in, represents the source intensity corresponding to the vehicle sound source, represents the noise value corresponding to the vehicle sound source, represents the target acoustic transfer function before the correction, represents the distance correction value, Indicates the humidity correction value.

[0020] To achieve the above-mentioned purpose, an embodiment of the second aspect of the present invention discloses a source intensity testing device for a vehicle sound source, comprising: an acquisition module, used to acquire the center point position of the vehicle sound source and the noise value corresponding to the vehicle sound source; a first determination module, used to determine the distance between the vehicle sound source and a sound source detection point according to the center point position of the vehicle sound source; a second determination module, used to determine a target sound transfer function according to the distance between the vehicle sound source and the sound source detection point; and a third determination module, used to determine the source intensity corresponding to the vehicle sound source according to the target sound transfer function and the noise value corresponding to the vehicle sound source.

[0021] According to the source strength testing device of the vehicle sound source of the embodiment of the present invention, by determining the center point position of the vehicle sound source, the distance between the vehicle sound source and the sound source detection point can be obtained, and then the sound transfer function from the vehicle sound source to the sound source detection point can be obtained, so that the sound propagation characteristics and energy transfer theory can be used, combined with the noise value measured at the sound source detection point, to determine the source strength corresponding to the vehicle sound source, which can not only reduce the influence of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance.

[0022] To achieve the above-mentioned purpose, the third aspect of the present invention discloses an electronic device, which includes: a source strength test device for a vehicle sound source as described in the second aspect of the present invention, or a processor, a memory, and a source strength test program for a vehicle sound source stored in the memory and executable on the processor, wherein the source strength test program for a vehicle sound source, when executed by the processor, implements the source strength test method for a vehicle sound source as described in the first aspect of the present invention.

[0023] The electronic device according to the embodiment of the present invention can obtain the distance between the vehicle sound source and the sound source detection point by determining the center point position of the vehicle sound source, and then obtain the sound transfer function from the vehicle sound source to the sound source detection point, so that the sound propagation characteristics and energy transfer theory can be used, combined with the noise value measured at the sound source detection point, to determine the source strength corresponding to the vehicle sound source, which can not only reduce the impact of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance.

[0024] To achieve the above-mentioned objectives, the fourth aspect of the present invention discloses a computer-readable storage medium, on which a source strength test program for a vehicle sound source is stored. When the source strength test program for a vehicle sound source is executed by a processor, the source strength test method for a vehicle sound source as described in the first aspect of the present invention is implemented.

[0025] According to the computer-readable storage medium of the embodiment of the present invention, when the source strength test program of the vehicle sound source stored thereon is executed by the processor, by determining the center point position of the vehicle sound source, the distance between the vehicle sound source and the sound source detection point can be obtained, and then the sound transfer function corresponding to the vehicle sound source can be obtained, so that the sound propagation characteristics and energy transfer theory can be used, combined with the noise value measured at the sound source detection point, to determine the source strength corresponding to the vehicle sound source, which can not only reduce the influence of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a flow chart of a method for testing the source strength of a vehicle sound source according to an embodiment of the present invention;

[0029] Figure 2 is a structural schematic diagram of the center point positions of different vehicle models according to an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of a structure for obtaining an acoustic transfer function according to an embodiment of the present invention;

[0031] Figure 4 is a schematic structural diagram of obtaining the source intensity of a vehicle sound source according to an embodiment of the present invention;

[0032] Figure 5 It is a structural schematic diagram of a source intensity testing device for a vehicle sound source according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0034] Reference below Figure 1-Figure 5 A method, device and electronic device for testing the source strength of a vehicle sound source according to an embodiment of the present invention are described.

[0035] Figure 1 FIG. 1 is a flow chart of a method for testing the source strength of a vehicle sound source according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0036] Step S1: Obtain the center point position of the vehicle sound source and the noise value corresponding to the vehicle sound source.

[0037] Specifically, when conducting a source strength test of a vehicle sound source, after determining the type of vehicle, the center point of the vehicle sound source can be obtained through actual recorded or measured data. At the same time, the noise value corresponding to the vehicle sound source when the vehicle passes through the sound source detection point can be measured through a device that collects noise signals (such as a microphone, etc.).

[0038] Step S2: Determine the distance between the vehicle sound source and the sound source detection point according to the center point position of the vehicle sound source.

[0039] Specifically, after determining the center point of the vehicle sound source, a measuring tool (such as a laser rangefinder, etc.) can be used to monitor in real time based on the determined sound source detection point to obtain the distance between the center point of the vehicle sound source and the sound source detection point when the vehicle passes through the sound source detection point, that is, the distance between the vehicle sound source and the sound source detection point.

[0040] Step S3: determining the target sound transfer function according to the distance between the vehicle sound source and the sound source detection point.

[0041] Specifically, after obtaining the distance between the vehicle sound source and the sound source detection point, the sound transfer function from the vehicle sound source to the sound source detection point, that is, the target sound transfer function, can be determined according to the distance between the vehicle sound source and the sound source detection point. For example, the data point closest to the input distance between the vehicle sound source and the sound source detection point can be searched in the sound transfer function database. If there is no completely matching data point in the sound transfer function database, an interpolation method (such as linear interpolation, polynomial interpolation, etc.) can be used to estimate the target sound transfer function, and then the most appropriate sound transfer function can be selected as the target sound transfer function according to the matching result or the interpolation result.

[0042] Step S4: determining the source intensity corresponding to the vehicle sound source according to the target sound transfer function and the noise value corresponding to the vehicle sound source.

[0043] Specifically, after determining the target sound transfer function, its corresponding sound transfer function value can be obtained, and then the sound transfer function value and the noise value corresponding to the vehicle sound source can be substituted into the preset algorithm to determine the source strength of the vehicle sound source. It can be understood that the target sound transfer function describes the attenuation and phase change of the sound signal during the propagation of noise from the vehicle sound source to the sound source detection point, and the noise value corresponding to the vehicle sound source describes the actual output level of the vehicle sound source during the propagation process. According to the target sound transfer function and the noise value corresponding to the vehicle sound source, the source strength corresponding to the vehicle sound source, that is, the sound power corresponding to the vehicle sound source, can be obtained.

[0044] In summary, according to the source strength testing method of the vehicle sound source in the embodiment of the present invention, by determining the center point position of the vehicle sound source, the distance between the vehicle sound source and the sound source detection point can be obtained, and then the sound transfer function from the vehicle sound source to the sound source detection point can be obtained, so that the sound propagation characteristics and energy transfer theory can be used, combined with the noise value measured at the sound source detection point, to determine the source strength corresponding to the vehicle sound source, which can not only reduce the influence of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance.

[0045] In one embodiment of the present invention, when obtaining the center point position of a vehicle sound source, it includes: obtaining the midpoint position of a line between a left front wheel and a left rear wheel, or a right front wheel and a right rear wheel of the vehicle, and the height corresponding to the vehicle at the midpoint position; determining the center point position of the vehicle sound source according to the midpoint position and the height corresponding to the vehicle at the midpoint position.

[0046] Specifically, when obtaining the center point position of the vehicle sound source, due to the symmetry of the vehicle, that is, the left and right sides of the vehicle are structurally symmetrical and the positions of the tires are relatively fixed, the line between the left front wheel and the left rear wheel of the vehicle, or the midpoint of the line between the right front wheel and the right rear wheel can be selected as part of the center point position of the vehicle sound source. Furthermore, the height corresponding to the midpoint position of the vehicle, that is, the vertical distance from the ground to the center point of the sound source, can be used as another part of the center point position of the vehicle sound source to determine the center point position of the vehicle sound source.

[0047] In a specific embodiment, the center point position of the vehicle sound source can be represented by coordinates, for example, Figure 2 As shown, for different models, a tape measure or a laser rangefinder or other equipment can be used to measure the straight-line distance between the left front wheel and the left rear wheel (or the right front wheel and the right rear wheel), and the measured distance can be divided by 2 to obtain the midpoint position. For example, for a passenger car, if the distance between the left front wheel and the left rear wheel is 2.5 meters, the midpoint position is 1.25 meters. For a light commercial truck, if the distance between the left front wheel and the left rear wheel is 3 meters, the midpoint position is 1.5 meters. For a heavy commercial truck, if the distance between the left front wheel and the left rear wheel is 5 meters, the midpoint position is 2.5 meters. For a bus, if the distance between the left front wheel and the left rear wheel is 7 meters, the midpoint position is 3.5 meters. Further, the height settings of different models may be different and need to be determined according to the specific model. For example, the height of a passenger car can be 0.8 meters, the height of a light commercial truck can be 1 meter, the height of a heavy commercial truck can be 1.5 meters, and the height of a bus can be 1.2 meters. In summary, the center point position of the passenger car sound source can be expressed as (1.25, 0, 0.8), the center point position of the passenger car sound source can be expressed as (1.5, 0, 1), the center point position of the passenger car sound source can be expressed as (2.5, 0, 1.5), and the center point position of the passenger car sound source can be expressed as (3.5, 0, 1.2).

[0048] In one embodiment of the present invention, before determining the target sound transfer function based on the distance between the vehicle sound source and the sound source detection point, it also includes: selecting different preset sound sources located at different center points; obtaining the first distances between the different preset sound sources and the sound source detection point; determining the sound transfer functions corresponding to the different first distances; and constructing a sound transfer function database based on the correspondence between the first distances corresponding to different preset sound sources and the sound transfer functions.

[0049] Specifically, before determining the target sound transfer function based on the distance between the vehicle sound source and the sound source detection point, a sound transfer function database can be established through the test system. Specifically, multiple different preset sound sources can be set at different center points, including but not limited to volume sound sources. At the same time, the straight-line distance (first distance) between the preset sound source and the sound source detection point can be obtained.

[0050] Further, in a specific embodiment, Figure 3 As shown, the acoustic transfer function corresponding to the first distance can be determined by obtaining the acceleration of the preset sound source and the noise value received at the sound source detection point. Specifically, the sound source detection point position A during the noise test can be determined, the bracket 4 is placed at the position of point A, and the volume sound source 3 (with an embedded volume acceleration sensor) is installed at point D on the bracket 4 (the height of point D is the height at which the microphone needs to be placed during the noise test, generally 1.5m). The volume sound source 3 is connected to the power amplifier 2 and the signal acquisition test system 1 through a signal line, and the computer 6 outputs a white noise signal to the signal acquisition test system 1, and drives the volume sound source 3 to emit a white noise signal through the power amplifier 2. At the same time, the computer records the volume acceleration value of the signal emitted by the volume sound source 3 through the signal acquisition test system 1. The microphone 5 is placed at point C on the bracket 7 and is connected to the signal acquisition test system 1 through a signal line to collect the white noise signal emitted by the volume sound source 3. The bracket 7 is placed at point B, and the position of point B is determined by the center line of the lane where the measured vehicle is traveling. Based on the volume acceleration of the volume sound source 3 when generating noise and the noise value recorded by the microphone 5, the acoustic transfer function between the volume sound source position D and the microphone position C (ie, the first distance) can be obtained.

[0051] Furthermore, the first distances and the corresponding acoustic transfer functions can be sorted, that is, an acoustic transfer function database can be constructed based on the correspondence between the first distances and acoustic transfer functions corresponding to different preset sound sources. For example, the acoustic transfer function database can include the following fields: first distance, acoustic transfer function.

[0052] In one embodiment of the present invention, when determining the target sound transfer function according to the distance between the vehicle sound source and the sound source detection point, it includes: matching the corresponding target sound transfer function from the sound transfer function database according to the distance between the vehicle sound source and the sound source detection point.

[0053] Specifically, when determining the target sound transfer function based on the distance between the vehicle sound source and the sound source detection point, the center point position of the vehicle sound source can be determined according to different vehicle models, and then the distance between the center point position of the vehicle sound source and the sound source detection point can be obtained, so as to facilitate matching the distance between the center point position of the vehicle sound source and the sound source detection point with the first distance in the sound transfer function database, and obtain the most suitable sound transfer function as the target sound transfer function.

[0054] In one embodiment of the present invention, after determining the target sound transfer function according to the distance between the vehicle sound source and the sound source detection point, it also includes: obtaining a distance correction value between the vehicle sound source and the sound source detection point and a humidity correction value in the environment where the vehicle sound source is located; correcting the target sound transfer function according to the distance correction value and the humidity correction value; and determining the source intensity corresponding to the vehicle sound source according to the corrected target sound transfer function and the noise value corresponding to the vehicle sound source.

[0055] Specifically, since the distance between the vehicle sound source and the sound source detection point may change significantly due to road conditions in actual tests, resulting in errors in the target sound transfer function, the distance correction value between the center point of the vehicle sound source and the sound source detection point can be obtained, and the target sound transfer function can be corrected according to the distance correction value; similarly, in a humid environment, the propagation speed of sound waves will slow down, and the absorption and scattering of sound waves will also increase, which may cause errors in the target sound transfer function. Therefore, the humidity correction value of the environment in which the vehicle sound source is located can be obtained, and the target sound transfer function can be corrected according to the humidity correction value. Further, the distance correction value and the humidity correction value can be applied to the target sound transfer function to obtain a corrected sound transfer function, and then the source intensity corresponding to the vehicle sound source can be determined according to the corrected target sound transfer function and the noise value corresponding to the vehicle sound source.

[0056] In one embodiment of the present invention, when obtaining the distance correction value between the vehicle sound source and the sound source detection point, it includes: obtaining a second distance between the center line of the lane where the vehicle sound source is located and the sound source detection point; and determining the distance correction value according to the difference between the distance between the vehicle sound source and the sound source detection point and the second distance.

[0057] Specifically, when obtaining the distance correction value between the vehicle sound source and the sound source detection point, the straight-line distance between the center line of the vehicle's driving lane and the sound source detection point when the vehicle passes the sound source detection point, that is, the second distance, can be obtained.

[0058] Furthermore, the distance correction value can be determined based on the difference between the distance between the center point position of the vehicle sound source and the sound source detection point and the second distance, including but not limited to obtaining a correction coefficient based on experiments or theoretical calculations, and then determining the distance correction value based on the correction coefficient and the difference between the distance between the center point position of the vehicle sound source and the sound source detection point and the second distance, or using a preset data table to find correction values ​​corresponding to different distance differences.

[0059] In one embodiment of the present invention, when obtaining the humidity correction value of the environment in which the vehicle sound source is located, it includes: obtaining the humidity value of the environment in which the vehicle sound source is located and a preset humidity value; and determining the humidity correction value based on the humidity value of the environment in which the vehicle sound source is located and the preset humidity value.

[0060] Specifically, when obtaining the humidity correction value of the environment in which the vehicle sound source is located, the humidity value of the environment in which the vehicle sound source is located can be obtained by setting up devices such as a humidity sensor or a hygrometer. At the same time, a preset humidity value can be set according to historical data, industry standards or specific application scenarios, for example, it can be 30% of the baseline humidity; further, the humidity correction value can be determined based on the humidity value of the environment in which the vehicle sound source is located and the preset humidity value, including but not limited to determining the humidity correction value according to the humidity value of the environment in which the vehicle sound source is located and the preset humidity value and a correction coefficient obtained according to experiments or theoretical calculations.

[0061] In one embodiment of the present invention, when determining the source intensity corresponding to the vehicle sound source according to the modified target sound transfer function and the noise value corresponding to the vehicle sound source, the specific formula is:

[0062] ;

[0063] in, is the source intensity corresponding to the vehicle sound source, is the noise value corresponding to the vehicle sound source, is the target acoustic transfer function before correction, is the distance correction value, is the humidity correction value.

[0064] Specifically, when the source intensity corresponding to the vehicle sound source is determined according to the modified target sound transfer function and the noise value corresponding to the vehicle sound source, the specific formula is as shown above, where: It represents the source strength corresponding to the vehicle sound source and describes the sound power corresponding to the vehicle sound source. It indicates the noise value corresponding to the vehicle sound source, and describes the noise sound pressure level collected by the noise collection device at the sound source detection point. It represents the target acoustic transfer function before correction, and describes the attenuation characteristics of the noise from the sound source to the sound source detection point before correction, including path attenuation, diffraction, reflection and scattering, etc. It represents the distance correction value corresponding to the target sound transfer function before correction. represents the humidity correction value corresponding to the target acoustic transfer function before correction, represents the modified target acoustic transfer function.

[0065] In a specific embodiment, Figure 4 As shown, when determining the source intensity corresponding to the vehicle sound source according to the corrected target sound transfer function and the noise value corresponding to the vehicle sound source, the specific process is as follows: the microphone 5 is placed on the bracket 7 and connected to the signal acquisition test system 6 and the computer 1. The bracket 7 is located at point A, the microphone 5 is kept at position D, and the laser rangefinder 8 is also fixed on the bracket 7. The height is not limited and is as close to 5 as possible. After the installation is completed, the test is started. When the vehicle passes through point C, the microphone 5 records its noise signal P and takes the sound pressure level. Further, based on the noise P measured by the microphone 5, the target sound transfer function determined according to the distance between the vehicle sound source and the sound source detection point, and the distance correction value and the humidity correction value, the source intensity corresponding to the vehicle sound source can be obtained.

[0066] In summary, according to the source strength test method of the vehicle sound source of the embodiment of the present invention, by determining the center point position of the vehicle sound source, the distance between the vehicle sound source and the sound source detection point can be obtained, and then the sound transfer function from the vehicle sound source to the sound source detection point can be obtained, so that the sound propagation characteristics and energy transfer theory can be used, combined with the noise value measured at the vehicle sound source detection point, to determine the source strength corresponding to the vehicle sound source, which can not only reduce the influence of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance. Furthermore, by obtaining the distance correction value and the humidity correction value to correct the target transfer function, the problem of error in the measurement result caused by the change in the distance between the vehicle sound source and the sound source detection point and the influence of environmental factors is avoided, and the accuracy and reliability of the test results are further improved.

[0067] A further embodiment of the present invention also provides a vehicle sound source source strength test device 100, such as Figure 5 As shown, the vehicle sound source source strength testing device 100 includes an acquisition module 110, a first determination module 120, a second determination module 130 and a third determination module 140, wherein:

[0068] The acquisition module 110 is used to acquire the center point position of the vehicle sound source and the noise value corresponding to the vehicle sound source;

[0069] The first determination module 120 determines the distance between the vehicle sound source and the sound source detection point according to the center point position of the vehicle sound source;

[0070] The second determination module 130 is used to determine the target sound transfer function according to the distance between the vehicle sound source and the sound source detection point;

[0071] The third determination module 140 is used to determine the source intensity corresponding to the vehicle sound source according to the target sound transfer function and the noise value corresponding to the vehicle sound source.

[0072] In one embodiment of the present invention, when obtaining the center point position of a vehicle sound source, the acquisition module 110 is specifically used to: obtain the midpoint position of the line between the left front wheel and the left rear wheel, or the right front wheel and the right rear wheel of the vehicle, and the height corresponding to the vehicle at the midpoint position; determine the center point position of the vehicle sound source according to the midpoint position and the height corresponding to the vehicle at the midpoint position.

[0073] In one embodiment of the present invention, before determining the target sound transfer function based on the distance between the vehicle sound source and the sound source detection point, the acquisition module 110 is further used to: select different preset sound sources located at different center points; obtain the first distances between the different preset sound sources and the sound source detection point; determine the sound transfer function corresponding to the first distance; and construct a sound transfer function database based on the correspondence between the first distances corresponding to different preset sound sources and the sound transfer functions.

[0074] In one embodiment of the present invention, when determining the target sound transfer function according to the distance between the vehicle sound source and the sound source detection point, the second determination module 130 is specifically used to match the corresponding target sound transfer function from the sound transfer function database according to the distance between the vehicle sound source and the sound source detection point.

[0075] In one embodiment of the present invention, after determining the target sound transfer function according to the distance between the vehicle sound source and the sound source detection point, the third determination module 140 is specifically used to: obtain a distance correction value between the vehicle sound source and the sound source detection point and a humidity correction value in the environment where the vehicle sound source is located; correct the target sound transfer function according to the distance correction value and the humidity correction value; and determine the source intensity corresponding to the vehicle sound source according to the corrected target sound transfer function and the noise value corresponding to the vehicle sound source.

[0076] In one embodiment of the present invention, when obtaining the distance correction value between the vehicle sound source and the sound source detection point, the third determination module 140 is specifically used to: obtain the second distance between the center line of the lane where the vehicle sound source is located and the sound source detection point; and determine the distance correction value according to the difference between the distance between the vehicle sound source and the sound source detection point and the second distance.

[0077] In one embodiment of the present invention, when obtaining the humidity correction value of the environment where the vehicle sound source is located, the third determination module 140 is specifically used to: obtain a preset humidity value; and determine the humidity correction value based on a preset ratio of the preset humidity value.

[0078] In one embodiment of the present invention, when determining the source intensity corresponding to the vehicle sound source according to the modified target sound transfer function and the noise value corresponding to the vehicle sound source, the specific formula is:

[0079] ;

[0080] in, represents the source intensity corresponding to the vehicle sound source, Indicates the noise value corresponding to the vehicle sound source, represents the target acoustic transfer function before correction, express The corresponding distance correction value is express The corresponding humidity correction value.

[0081] According to the vehicle sound source source strength test device 100 of the embodiment of the present invention, by determining the center point position of the vehicle sound source, the distance between the vehicle sound source and the sound source detection point can be obtained, and then the sound transfer function from the vehicle sound source to the sound source detection point can be obtained, so that the sound propagation characteristics and energy transfer theory can be used, combined with the noise value measured at the sound source detection point, to determine the source strength corresponding to the vehicle sound source, which can not only reduce the influence of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance. Further, by obtaining the distance correction value and the humidity correction value to correct the target transfer function, the problem of error in the measurement result caused by the change in the distance between the vehicle sound source and the sound source detection point and the influence of environmental factors is avoided, and the accuracy and reliability of the test results are further improved.

[0082] To achieve the above-mentioned purpose, the third aspect of the present invention discloses an electronic device, which includes: a source strength test device for a vehicle sound source as in the second aspect of the present invention, or a processor, a memory, and a source strength test program for a vehicle sound source stored in the memory and executable on the processor, wherein the source strength test program for a vehicle sound source, when executed by the processor, implements the source strength test method for a vehicle sound source as in the first aspect of the present invention.

[0083] According to the electronic device of the embodiment of the present invention, by determining the center point position of the vehicle sound source, the distance between the vehicle sound source and the sound source detection point can be obtained, and then the sound transfer function from the vehicle sound source to the sound source detection point can be obtained, so that the sound propagation characteristics and energy transfer theory can be used, combined with the noise value measured at the sound source detection point, to determine the source strength corresponding to the vehicle sound source, which can not only reduce the influence of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance. Furthermore, by obtaining the distance correction value and the humidity correction value to correct the target sound transfer function, the problem of measurement error caused by the change of the distance between the vehicle sound source and the sound source detection point and the influence of environmental factors is avoided, and the accuracy and reliability of the test results are further improved.

[0084] To achieve the above-mentioned objectives, an embodiment of the fourth aspect of the present invention discloses a computer-readable storage medium, on which a source strength test program for a vehicle sound source is stored. When the source strength test program for a vehicle sound source is executed by a processor, a source strength test method for a vehicle sound source as in the embodiment of the first aspect of the present invention is implemented.

[0085] According to the computer-readable storage medium of the embodiment of the present invention, when the source intensity test program of the vehicle sound source stored thereon is executed by the processor, by determining the center point position of the vehicle sound source, the distance between the vehicle sound source and the sound source detection point can be obtained, and then the sound transfer function from the vehicle sound source to the sound source detection point can be obtained, so that the sound propagation characteristics and energy transfer theory can be used, combined with the noise value measured at the sound source detection point, to determine the source intensity corresponding to the vehicle sound source, which can not only reduce the influence of environmental factors and improve the accuracy and reliability of the test results, but also reduce the test cost, simplify the test process, and improve the real-time performance. Further, by obtaining the distance correction value and the humidity correction value to correct the target transfer function, the problem of error in the measurement result caused by the change in the distance between the vehicle sound source and the sound source detection point and the influence of environmental factors is avoided, and the accuracy and reliability of the test results are further improved.

[0086] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0087] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for testing the source intensity of a vehicle sound source, characterized in that: include: Obtaining the center point position of the vehicle sound source, the noise value corresponding to the vehicle sound source, the distance correction value between the vehicle sound source and the sound source detection point, and the humidity correction value of the environment in which the vehicle sound source is located; Determine the distance between the vehicle sound source and the sound source detection point according to the center point position of the vehicle sound source; Determining a target sound transfer function according to the distance between the vehicle sound source and the sound source detection point; Correcting the target acoustic transfer function according to the distance correction value and the humidity correction value; The source intensity corresponding to the vehicle sound source is determined according to the corrected target sound transfer function and the noise value corresponding to the vehicle sound source. The specific formula is: ； in, represents the source intensity corresponding to the vehicle sound source, represents the noise value corresponding to the vehicle sound source, represents the target acoustic transfer function before correction, a represents the distance correction value, and h represents the humidity correction value.

2. The source intensity testing method of a vehicle sound source according to claim 1, characterized in that: When obtaining the center point position of the vehicle sound source, it includes: Obtaining the midpoint of the line between the left front wheel and the left rear wheel, or the right front wheel and the right rear wheel of the vehicle, and the height of the vehicle at the midpoint; The center point position of the vehicle sound source is determined according to the midpoint position and the height of the vehicle corresponding to the midpoint position.

3. The source intensity testing method of a vehicle sound source according to claim 1, characterized in that: Before determining the target sound transfer function according to the distance between the vehicle sound source and the sound source detection point, the method further includes: Select different preset sound sources located at different center points; Acquire a first distance between different preset sound sources and the sound source detection point; determining acoustic transfer functions corresponding to different first distances; An acoustic transfer function database is constructed based on the corresponding relationship between the first distances corresponding to different preset sound sources and the acoustic transfer functions.

4. The source intensity testing method of a vehicle sound source according to claim 3, characterized in that: When determining the target sound transfer function according to the distance between the vehicle sound source and the sound source detection point, it includes: According to the distance between the vehicle sound source and the sound source detection point, a corresponding target sound transfer function is matched from the sound transfer function database.

5. The source intensity testing method of a vehicle sound source according to claim 1, characterized in that: When obtaining the distance correction value between the vehicle sound source and the sound source detection point, it includes: Obtaining a second distance between the center line of the lane where the vehicle sound source is located and the sound source detection point; The distance correction value is determined according to the difference between the distance between the vehicle sound source and the sound source detection point and the second distance.

6. The vehicle sound source intensity testing method according to claim 1, characterized in that: When obtaining the humidity correction value of the environment in which the vehicle sound source is located, it includes: Obtaining a humidity value and a preset humidity value in the environment where the vehicle sound source is located; The humidity correction value is determined based on the humidity value and the preset humidity value.

7. A vehicle sound source strength test device, characterized in that: include: An acquisition module, used to acquire the center point position of the vehicle sound source, the noise value corresponding to the vehicle sound source, the distance correction value between the vehicle sound source and the sound source detection point, and the humidity correction value of the environment in which the vehicle sound source is located; A first determination module determines the distance between the vehicle sound source and the sound source detection point according to the center point position of the vehicle sound source; A second determination module is used to determine a target sound transfer function according to the distance between the vehicle sound source and the sound source detection point; The third determination module is used to correct the target sound transfer function according to the distance correction value and the humidity correction value, and determine the source intensity corresponding to the vehicle sound source according to the corrected target sound transfer function and the noise value corresponding to the vehicle sound source. The specific formula is: ； in, represents the source intensity corresponding to the vehicle sound source, represents the noise value corresponding to the vehicle sound source, represents the target acoustic transfer function before correction, a represents the distance correction value, and h represents the humidity correction value.

8. An electronic device, characterized in that: include: The source intensity testing device for a vehicle sound source as claimed in claim 7, or, A processor, a memory, and a source strength test program for a vehicle sound source stored in the memory and executable on the processor, wherein the source strength test program for a vehicle sound source, when executed by the processor, implements the source strength test method for a vehicle sound source as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a source strength test program for a vehicle sound source, and when the source strength test program for a vehicle sound source is executed by a processor, the source strength test method for a vehicle sound source as described in any one of claims 1-6 is implemented.

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