Method and device for evaluating sound insulation performance of vehicle door sealing strip

Abstract

The invention relates to the technical field of automobile engineering, in particular to a sound insulation performance evaluation method and device for a vehicle door sealing strip, and the method comprises the steps: obtaining a first vehicle door opening value of a target vehicle at a target wind speed and a second vehicle door opening value of the target vehicle in a target test environment; under the condition that the first vehicle door external opening value is equal to the second vehicle door external opening value, a plurality of one-third octaves corresponding to acoustic transfer functions between a plurality of microphones in the surrounding environment of the target vehicle and a sound source point at a preset position are obtained; and solving the acoustic transfer function frequency spectrum of the door of the target vehicle at the target vehicle speed to generate the sound insulation performance of the door sealing strip of the target vehicle at the target wind speed. Therefore, the problems that in the related technology, most automobile enterprises do not form a unified and effective evaluation method for sound insulation performance evaluation of the automobile door sealing strip in the high-speed state, and it is difficult to specifically recognize the sound insulation problem source of the automobile door sealing strip for optimization are solved.

Description

Technical Field

[0001] This application relates to the field of automotive engineering technology, and in particular to a method and apparatus for evaluating the sound insulation performance of a car door sealing strip. Background Technology

[0002] With the development of the automotive market towards high-end products, NVH (Noise, Vibration, and Harshness) has become an essential part of creating a luxurious feel in automobiles. Among these aspects, the design of door sealing strips has become a key issue in controlling wind noise at high speeds. When a car travels at speeds above 120 km / h, the airflow outside the car is fast, and the pressure is lower due to the Bernoulli effect. The door then exhibits an outward flare, making it easy for the sealing strips to fail to seal properly in certain areas, resulting in sound leakage.

[0003] In related technologies, car manufacturers mainly avoid wind noise leakage problems by designing the compression amount of sealing strips and the bubble design, and then use human hearing to identify the leakage points of car door sound.

[0004] However, in related technologies, most car manufacturers have not formed a unified and effective evaluation method for the sound insulation performance of door seals at high speeds, and it is also difficult to identify the source of sound insulation problems in door seals for optimization. This makes it difficult to meet the evaluation and optimization needs of door sound insulation performance, which urgently needs to be solved. Summary of the Invention

[0005] This application provides a method and apparatus for evaluating the sound insulation performance of vehicle door sealing strips, in order to solve the problems in the related technology that most automobile companies have not formed a unified and effective evaluation method for evaluating the sound insulation performance of vehicle door sealing strips under high-speed conditions, and it is also difficult to identify the source of sound insulation problems of vehicle door sealing strips in a targeted manner for optimization, thus failing to meet the evaluation and optimization needs of vehicle door sound insulation performance.

[0006] The first aspect of this application provides a method for evaluating the sound insulation performance of a vehicle door sealing strip, comprising the following steps: obtaining a first door flare value of a target vehicle under a target wind speed and a second door flare value of the target vehicle under a target test environment; when the first door flare value and the second door flare value are equal, obtaining the acoustic transfer function between multiple microphones in the surrounding environment of the target vehicle and a sound source point at a preset location, and generating multiple one-third octave bands corresponding to the acoustic transfer function; based on the multiple one-third octave bands, solving the acoustic transfer function spectrum of the target vehicle door under the target vehicle speed, and generating the sound insulation performance of the target vehicle door sealing strip under the target wind speed based on the acoustic transfer function spectrum.

[0007] Using the above technical means, the embodiments of this application can obtain the acoustic transfer function between the inside and outside of the target vehicle and the corresponding multiple one-third octave bands under the condition that the door external tension value is equal under certain wind speed and certain test environment. In order to solve the acoustic transfer function spectrum of the door, the sound insulation performance of the door sealing strip can be generated, which can effectively evaluate the sound insulation performance of the door sealing strip under high wind speed.

[0008] Optionally, in one embodiment of this application, before obtaining the acoustic transfer function between the microphone of the target vehicle and the sound source point at the preset position, the method further includes: determining the external ear positions of multiple driving positions adjacent to the door of the target vehicle based on the actual structural information of the vehicle seat; and determining the sound source point at the preset position based on the external ear positions of the multiple positions.

[0009] Through the above technical means, the embodiments of this application can determine the location of the sound source point by the actual structural information of the vehicle seat, thereby taking into account the noise that may be received by all driving and riding positions to the greatest extent, and thus effectively characterizing the sound insulation performance of the door sealing strip.

[0010] Optionally, in one embodiment of this application, the step of solving the acoustic transfer function spectrum of the target vehicle at the target speed based on the plurality of third-octave bands includes: calculating the energy value corresponding to the plurality of third-octave bands based on the plurality of third-octave bands; and generating the acoustic transfer function spectrum based on the average value of the energy values ​​corresponding to the plurality of third-octave bands.

[0011] Through the above technical means, the embodiments of this application can use the average energy of the acoustic transmission function of each one-third octave band to form the spectrum, thereby avoiding the error of the direct arithmetic mean of the logarithmic unit of the acoustic transmission function, accurately reflecting the real sound insulation difference of the door sealing strip of the target vehicle in different frequency bands, which helps to quickly locate the weak sound insulation frequency band, provide effective guidance for the optimization of the door, avoid the cost waste of indiscriminate adjustment of the entire frequency band, and thus improve the sound insulation performance of the door sealing strip.

[0012] Optionally, in one embodiment of this application, after generating the sound insulation performance of the door sealing strip of the target vehicle under the target wind speed, the method further includes: determining the sound leakage location of the door of the target vehicle based on the sound insulation difference points of the two doors of the target vehicle; when the sound leakage location of the door is blocked, obtaining the acoustic transfer function spectrum of the door under the desired production conditions, so as to generate a second sound insulation performance of the door sealing strip under the desired production conditions based on the acoustic transfer function spectrum of the door under the desired production conditions; and generating a production optimization suggestion for the door based on the difference between the second sound insulation performance and the sound insulation performance, so as to optimize the door sealing strip to meet the target production requirements according to the production optimization suggestion.

[0013] Using the above technical means, the embodiments of this application can obtain the acoustic transmission function after the sound leakage position of the car door is blocked, compare it with the acoustic transmission function before the sound leakage position of the car door is blocked, and obtain the sound insulation effect caused by manufacturing factors through the measurement difference between the two acoustic transmission functions.

[0014] Optionally, in one embodiment of this application, after generating the second sound insulation performance of the door sealing strip under the desired conditions based on the acoustic transfer function spectrum of the door under the desired conditions, the method further includes: obtaining the acoustic transfer function spectrum of the door under the desired design and actual production conditions while sealing the sound leakage location of the door and the door gap; generating the third sound insulation performance of the door sealing strip under the desired design and actual production conditions based on the acoustic transfer function spectrum of the door under the desired design and actual production conditions; and generating a design optimization suggestion for the door based on the difference between the third sound insulation performance and the second sound insulation performance, so as to optimize the door sealing strip to meet the target design requirements according to the design optimization suggestion.

[0015] Using the above technical means, the embodiments of this application can further seal the door gaps after sealing the sound leakage points of the car door, and then measure the sound transmission function again. By comparing the sound transmission function when only the sound leakage points of the car door are sealed, the difference between the two sound transmission functions can be used to determine the impact of design factors on sound insulation.

[0016] A second aspect of this application provides a device for evaluating the sound insulation performance of a vehicle door sealing strip, comprising: a first acquisition module, configured to acquire a first door extension value of a target vehicle under a target wind speed and a second door extension value of the target vehicle under a target test environment; a first generation module, configured to, when the first door extension value and the second door extension value are equal, acquire the acoustic transfer function between multiple microphones in the surrounding environment of the target vehicle and a sound source point at a preset location, and generate multiple one-third octave bands corresponding to the acoustic transfer function; and an evaluation module, configured to, based on the multiple one-third octave bands, solve the acoustic transfer function spectrum of the target vehicle door under the target vehicle speed, and generate the sound insulation performance of the target vehicle door sealing strip under the target wind speed based on the acoustic transfer function spectrum.

[0017] Using the above technical means, the embodiments of this application can obtain the acoustic transfer function between the inside and outside of the target vehicle and the corresponding multiple one-third octave bands under the condition that the door external tension value is equal under certain wind speed and certain test environment. In order to solve the acoustic transfer function spectrum of the door, the sound insulation performance of the door sealing strip can be generated, which can effectively evaluate the sound insulation performance of the door sealing strip under high wind speed.

[0018] Optionally, in one embodiment of this application, it further includes: a first determining module, configured to determine the external ear positions of multiple driving positions adjacent to the doors of the target vehicle based on the actual structural information of the vehicle seats before obtaining the acoustic transfer function between the microphone of the target vehicle and the sound source point at the preset position; and a second determining module, configured to determine the sound source point at the preset position based on the external ear positions of the multiple positions.

[0019] Through the above technical means, the embodiments of this application can determine the location of the sound source point by the actual structural information of the vehicle seat, thereby taking into account the noise that may be received by all driving and riding positions to the greatest extent, and thus effectively characterizing the sound insulation performance of the door sealing strip.

[0020] Optionally, in one embodiment of this application, the evaluation module includes: a calculation unit, configured to calculate the energy values ​​corresponding to the plurality of third octaves based on the plurality of third octaves; and a generation unit, configured to generate the acoustic transfer function spectrum based on the average value of the energy values ​​corresponding to the plurality of third octaves.

[0021] Through the above technical means, the embodiments of this application can use the average energy of the acoustic transmission function of each one-third octave band to form the spectrum, thereby avoiding the error of the direct arithmetic mean of the logarithmic unit of the acoustic transmission function, accurately reflecting the real sound insulation difference of the door sealing strip of the target vehicle in different frequency bands, which helps to quickly locate the weak sound insulation frequency band, provide effective guidance for the optimization of the door, avoid the cost waste of indiscriminate adjustment of the entire frequency band, and thus improve the sound insulation performance of the door sealing strip.

[0022] Optionally, in one embodiment of this application, it further includes: a third determining module, configured to, after generating the sound insulation performance of the door sealing strip of the target vehicle under the target wind speed, determine the sound leakage location of the door of the target vehicle based on the sound insulation difference points of the two doors of the target vehicle; a second obtaining module, configured to, while blocking the sound leakage location of the door, obtain the acoustic transfer function spectrum of the door under the desired production conditions, so as to generate a second sound insulation performance of the door sealing strip under the desired production conditions based on the acoustic transfer function spectrum of the door under the desired production conditions; and a first optimizing module, configured to, based on the difference between the second sound insulation performance and the sound insulation performance, generate a production optimization suggestion for the door, so as to optimize the door sealing strip to meet the target production requirements according to the production optimization suggestion.

[0023] Using the above technical means, the embodiments of this application can obtain the acoustic transmission function after the sound leakage position of the car door is blocked, compare it with the acoustic transmission function before the sound leakage position of the car door is blocked, and obtain the sound insulation effect caused by manufacturing factors through the measurement difference between the two acoustic transmission functions.

[0024] Optionally, in one embodiment of this application, it further includes: a third acquisition module, configured to, after generating the second sound insulation performance of the door sealing strip under the desired conditions based on the acoustic transfer function spectrum of the door under the desired conditions, acquire the acoustic transfer function spectrum of the door under the desired design and actual production conditions, while sealing the sound leakage location of the door and the door gap; a second generation module, configured to generate the third sound insulation performance of the door sealing strip under the desired design and actual production conditions based on the acoustic transfer function spectrum of the door under the desired design and actual production conditions; and a second optimization module, configured to generate design optimization suggestions for the door based on the difference between the third sound insulation performance and the second sound insulation performance, so as to optimize the door sealing strip to meet the target design requirements according to the design optimization suggestions.

[0025] Using the above technical means, the embodiments of this application can further seal the door gaps after sealing the sound leakage points of the car door, and then measure the sound transmission function again. By comparing the sound transmission function when only the sound leakage points of the car door are sealed, the difference between the two sound transmission functions can be used to determine the impact of design factors on sound insulation.

[0026] A third aspect of this application provides a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the sound insulation performance evaluation method for door sealing strips as described in the above embodiments.

[0027] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for evaluating the sound insulation performance of a vehicle door sealing strip.

[0028] A fifth aspect of this application provides a computer program product, including a computer program that, when executed, is used to implement the above-described method for evaluating the sound insulation performance of a vehicle door sealing strip.

[0029] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart illustrating a method for evaluating the sound insulation performance of a vehicle door sealing strip according to an embodiment of this application; Figure 2 This is a schematic diagram of the sound source location according to an embodiment of this application; Figure 3 This is a schematic diagram of the sound insulation performance evaluation device for a car door sealing strip provided according to an embodiment of this application; Figure 4 This is a structural schematic diagram of a vehicle provided according to an embodiment of this application.

[0031] Figure label: 10-Evaluation device for sound insulation performance of door sealing strip; 100-First acquisition module, 200-First generation module and 300-Evaluation module; 401-Memory, 402-Processor and 403-Communication interface. Detailed Implementation

[0032] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0033] The following describes a method and apparatus for evaluating the sound insulation performance of a car door sealing strip according to embodiments of this application, with reference to the accompanying drawings. Regarding the related technologies mentioned in the background section, most automotive companies have not developed a unified and effective evaluation method for the sound insulation performance of car door sealing strips under high-speed conditions. It is also difficult to specifically identify the sources of sound insulation problems in car door sealing strips for optimization, thus failing to meet the evaluation and optimization needs for car door sound insulation performance. This application provides a method for evaluating the sound insulation performance of a car door sealing strip. In this method, under conditions of equal door external tension values ​​at a certain wind speed and in a certain test environment, the acoustic transfer function between the inside and outside of the target vehicle and the corresponding multiple one-third octave bands are obtained to solve for the acoustic transfer function spectrum of the door and generate the sound insulation performance of the car door sealing strip. This invention enables the measurement of the acoustic transmission function (ACF) of the door seal strip when the target vehicle's doors are open at high speed, thus representing the sound insulation performance of the door seal strip. This facilitates target setting, benchmarking, and problem decomposition. Furthermore, this application can remeasure the ACF by sealing the sound leakage points of the door and compare it with the ACF of the door without sealing the sound leakage points to determine the impact of manufacturing factors on sound insulation. Finally, the ACF is measured again by sealing both the sound leakage points and the door gaps, and compared with the ACF of the door with only the sound leakage points sealed to determine the impact of design factors on sound insulation. This allows for the generation of effective production optimization and design optimization suggestions for optimizing the door seal strip. This solves the problems in related technologies, such as the lack of a unified and effective evaluation method for the sound insulation performance of door seal strips under high-speed conditions among most automotive companies, the difficulty in specifically identifying the sources of sound insulation problems in door seal strips for optimization, and the inability to meet the evaluation and optimization needs for door sound insulation performance.

[0034] Specifically, Figure 1 This is a flowchart illustrating a method for evaluating the sound insulation performance of a car door sealing strip, as provided in an embodiment of this application.

[0035] like Figure 1 As shown, the method for evaluating the sound insulation performance of the door sealing strip includes the following steps: In step S101, the first door outward tension value of the target vehicle under the target wind speed and the second door outward tension value of the target vehicle under the target test environment are obtained.

[0036] It is understandable that "target vehicle" here refers to the vehicle being evaluated for the sound insulation performance of the door seals. "Target wind speed" here can be understood as the wind speed used during the evaluation of the door seals' sound insulation performance. "Target test environment" here refers to the test environment pre-set based on the specific requirements of the door seals' sound insulation performance evaluation.

[0037] In some embodiments, when evaluating the sound insulation performance of the door sealing strip of a target vehicle, this application can use the first door outward expansion value of the target vehicle under a certain wind speed and the second door outward expansion value of the target vehicle under a certain test environment as data basis to evaluate the sound insulation performance of the door sealing strip of the target vehicle.

[0038] For example, in this application embodiment, the target vehicle can be placed in a wind tunnel laboratory with a wind speed of 160 km / h, and the outward expansion value X mm of the first door of the target vehicle can be measured by a three-dimensional dynamic deformation measuring instrument. Generally, X is usually between 0.5 mm and 1.5 mm.

[0039] Furthermore, in this embodiment of the application, the target test environment can also be set as a semi-anechoic test environment. In the semi-anechoic chamber test environment, a certain sound source is placed inside the target vehicle, and then the air conditioning is turned on with internal circulation, and the doors, windows, and sunroof are closed; then the rear bumper of the car is removed to expose the rear air vents of the car's air conditioning. Air is inflated into the rear air vents with an air inflator until the inflation rate is equal to the car's air leakage rate, and then the outward expansion value Ymm of the second door of the target vehicle is measured using a three-dimensional dynamic deformation measuring instrument.

[0040] Therefore, measuring the first door's outward expansion value of the target vehicle under a certain wind speed can help understand the sound transmission from outside the vehicle from inside the vehicle, while the second door's outward expansion value of the target vehicle under a certain test environment can help understand the sound leakage from outside the vehicle. Thus, combining the two can effectively and accurately determine the sound insulation performance of the door sealing strip.

[0041] It should be noted that the specific sound intensity of the semi-anechoic chamber test environment can be determined by those skilled in the art based on the actual situation. This embodiment is merely illustrative and not intended to impose specific limitations. Furthermore, the terms "first door outward flare value" and "second door outward flare value" are merely designations used here to distinguish the door outward flare values ​​of the target vehicle under certain wind speeds and test conditions; essentially, they are both door outward flare values ​​of the target vehicle and are not differentiated.

[0042] In this embodiment, the first door outward expansion value can be measured in a wind tunnel using three-dimensional dynamic deformation measurement. Then, in a semi-anechoic chamber, an air compressor is used to inflate the rear air vent of the air conditioner to simulate the door outward expansion at high speed, thereby obtaining the second door outward expansion value. This facilitates the later measurement of the acoustic transmission function between the measuring points of the sealing strip inside and outside the vehicle using the reciprocity method.

[0043] Step S102: When the external tension values ​​of the first door and the second door are equal, obtain the acoustic transfer function between multiple microphones in the surrounding environment of the target vehicle and the sound source point at the preset position, and generate multiple one-third octave bands corresponding to the acoustic transfer function.

[0044] In other embodiments, after obtaining the first and second door extension values ​​of the target vehicle under certain wind speed and certain test conditions, this application can further obtain the acoustic transfer function between multiple microphones in the surrounding environment of the target vehicle and the sound source point at a preset position when the first and second door extension values ​​are equal, and generate multiple one-third octave bands corresponding to the acoustic transfer function.

[0045] Here, the surrounding environment refers to the total area within a certain distance from the target vehicle as predetermined. For example, taking the surrounding environment as within 15cm, the embodiments of this application can arrange microphones along the door gaps outside the target vehicle: the microphones are 10cm away from the door gaps, the microphones are spaced 10cm apart, and all the microphones are arranged in a complete circle around all the doors, for a total of n microphones.

[0046] The preset location here refers to the pre-defined placement (installation) position of the sound source point. The sound source point here refers to the sound source point placed inside the target vehicle when obtaining the external tension value of the second door of the target vehicle under a certain test environment.

[0047] The acoustic transfer function (ATF) is a mathematical tool used in acoustic systems to describe the relationship between input and output signals in the frequency domain. It describes how the sound pressure / vibration at the output changes (e.g., amplification, attenuation, phase shift) after the input sound energy / vibration energy has passed through a specific acoustic system. Simply put, the sound pressure levels (in dB) of the input and output sounds are collected separately, and the difference (or ratio) between them is calculated using a formula. The result is the ATF, also in dB. For example, if the external noise level is 70 dB and the internal noise level is 50 dB, then the ATF = 50 dB - 70 dB = -20 dB. The physical meaning of -20 dB is that the sound intensity is attenuated by 20 dB after passing through the car door (including the sealing strip): the more negative the value, the better the sound insulation / attenuation effect.

[0048] Octave bands are a frequency band division method used in acoustics to simplify frequency domain analysis. They are mainly used to divide a continuous acoustic frequency range (such as 20Hz~20kHz audible sound) into several frequency bands of equal width, thereby avoiding excessive complexity in frequency domain analysis due to too many frequency points. Since the transfer function data in the continuous frequency domain is extremely large, the embodiments of this application can integrate the data in one-third octave bands, which facilitates the rapid location of key influencing frequency bands.

[0049] Generally, the upper and lower limits of an octave satisfy the following: One-third octave bands are formed by dividing one octave band into three equal smaller frequency bands, with the upper and lower limits of each smaller frequency band satisfying the following conditions: Taking a frequency band of 100Hz to 200Hz as an example, one-third of the frequency band consists of 100Hz to 125Hz, 125Hz to 160Hz, and 160Hz to 200Hz. These three frequency bands together constitute one frequency band of 100Hz to 200Hz.

[0050] For example, if the external expansion value X of the first door is not equal to the external expansion value Y of the second door, certain adjustments can be made to the embodiments of this application. For example, if Y < X, the inflation speed of the inflator into the rear air vent can be increased until Y = X; if Y > X, the inflation speed of the inflator into the rear air vent can be decreased until Y = X.

[0051] Then, when the external tension value X of the first car door is equal to the external tension value Y of the second car door, the embodiments of this application can obtain the acoustic transfer function between multiple microphones in the surrounding environment of the target vehicle and the sound source point at a preset position according to the sound transmission situation.

[0052] For example, this application can activate a sound source point inside the target vehicle to emit white noise at 400-8000Hz. Then, using the reciprocity method (where the sound source is outside the vehicle and the measurement point is inside, this is a normal measurement; placing the sound source inside the vehicle and the measurement point outside is a reciprocity method measurement. Theoretically, the results of both methods are consistent, but in practice, for ease of setup, acoustic transfer function measurements are primarily performed using the reciprocity method), the acoustic transfer function from the sound source point to each microphone point in the surrounding environment of the target vehicle is measured, and then expressed in one-third octave bands. Table 1 is a one-third octave band table of one embodiment of this application, which can be represented as follows: Table 1

[0053] This application embodiment can obtain the acoustic transfer function between the sound inside and outside the vehicle when the outer tension values ​​of the first and second doors are equal. By controlling the outer tension values ​​of the doors to be consistent (i.e., the sealing strip compression state is the same), the interference of the difference in the door closing state on the measurement is eliminated, ensuring that the acoustic transfer function only reflects the sound insulation characteristics of the sealing strip itself. Combined with one-third octave band frequency subdivision, the sound insulation strength of the sealing strip in different frequency bands can be accurately located (such as the abnormal acoustic transfer function caused by poor sealing in a certain frequency band), providing a reliable basis for its sound insulation performance evaluation and targeted optimization.

[0054] Optionally, in one embodiment of this application, before obtaining the acoustic transfer function between the microphone of the target vehicle and the sound source point at the preset position, the method further includes: determining the external ear positions of multiple driving positions adjacent to the door of the target vehicle based on the actual structural information of the vehicle seat; and determining the sound source point at the preset position based on the external ear positions of the multiple positions.

[0055] Based on the descriptions of other embodiments, it is understood that when obtaining the second door external tension value of the target vehicle under a certain test environment, this application needs to set a certain sound source point inside the vehicle, and then obtain the acoustic transfer function between multiple microphones in the surrounding environment of the target vehicle and the sound source point at a certain position, and generate multiple one-third octave bands corresponding to the acoustic transfer function.

[0056] In actual implementation, in order to ensure that the sound source point can represent the sound source dispersion in the vehicle to the greatest extent, and at the same time take into account the sound reception of multiple drivers and passengers to the greatest extent, this application can, but is not limited to, determine the position of the external ear of the human in multiple driving positions adjacent to the door of the target vehicle based on the actual structural information of the vehicle seat, and then determine the position where the sound source point should be placed based on the position of the external ear of the human in multiple positions, thereby determining the sound source point at a certain position.

[0057] The actual structural information here includes, but is not limited to, structural information such as the seat dimensions of the target vehicle, the seat's position within the vehicle, and the calibrated passenger driving / riding positions. Therefore, embodiments of this application can determine the most likely driving / riding positions and postures of occupants across multiple seats based on this information. Furthermore, embodiments of this application can determine the external ear positions of occupants in multiple driving positions adjacent to the vehicle doors within the target vehicle based on their driving / riding positions and postures; that is, the ear positions of occupants in multiple seats connected to the vehicle doors that are closest to the door.

[0058] After determining the positions of the external ears of the human body in multiple driver positions adjacent to the doors in the target vehicle, the embodiments of this application can determine the placement location of the sound source point, that is, determine the sound source point at a certain location. Specifically, the location of the sound source point is the common intersection point of the external ear positions of the multiple driver positions.

[0059] For example, Figure 2 This is a schematic diagram showing the location of a sound source point according to one embodiment of this application. Figure 2 As shown, in the case of a vehicle with two rows of seats, the embodiment of this application can place a mid-to-high frequency volumetric sound source at an intersection point formed by the line connecting the driver's outer ear position and the outer ear position of the right rear seat and the line connecting the front passenger's outer ear position and the outer ear position of the left rear seat.

[0060] In the case of a vehicle with three rows of seats, the embodiment of this application can arrange the mid-to-high frequency volumetric sound source at the intersection of three lines: the line connecting the driver's outer ear position and the outer ear position of the right seat in the last row, the line connecting the front passenger's outer ear position and the outer ear position of the left seat in the last row, and the line connecting the leftmost seat and the rightmost seat in the middle row.

[0061] The embodiments of this application can determine the location of the sound source by using the actual structural information of the vehicle seat, thereby taking into account the noise that may be received by all driving and riding positions to the greatest extent, and thus effectively characterizing the sound insulation performance of the door sealing strip.

[0062] Step S103: Based on multiple third-octave bands, solve the acoustic transfer function spectrum of the target vehicle's door at the target vehicle speed, and based on the acoustic transfer function spectrum, generate the sound insulation performance of the target vehicle's door sealing strip at the target wind speed.

[0063] As one possible approach, after obtaining the acoustic transfer function between multiple microphones in the surrounding environment of the target vehicle and the sound source at a preset location, and the corresponding multiple third-octave bands of the acoustic transfer function, this application can solve the acoustic transfer function spectrum of the target vehicle's door at the target vehicle speed based on the multiple third-octave bands, and generate the sound insulation performance of the target vehicle's door sealing strip at the target wind speed based on the acoustic transfer function spectrum.

[0064] For example, after obtaining multiple one-third octave bands (such as 63Hz, 125Hz, 250Hz, 500Hz, 1kHz, etc., key frequency points), this application can obtain the input noise level (e.g., 75dB at 1kHz outside the vehicle) and the output noise level (e.g., 55dB at 1kHz inside the vehicle) at each frequency point.

[0065] Then, the embodiment of this application can calculate the acoustic transfer function (ATF) spectrum: for each one-third octave frequency point, the transfer characteristics at that frequency can be obtained by calculating "acoustic transfer function level difference = in-vehicle output noise level - out-of-vehicle input noise level". For example, at 1kHz, ATF = 55 - 75 = -20dB, which means that the sound is attenuated by 20dB after being transmitted through the door; by arranging the ATF values ​​of all frequency points in the order of frequency, the ATF spectrum of the door at 160km / h can be generated.

[0066] By analyzing the ATF spectrum, if the ATF level difference at a certain frequency point (such as 250Hz) is -12dB, which is significantly higher than the -18dB of the adjacent frequency, it can be said that the sound transmission attenuation at that frequency is insufficient. Therefore, it can be determined that there is a weak point in the sound insulation of the door seal in the 250Hz frequency band, and thus the sound insulation performance and weaknesses of the door seal under this high-speed condition can be determined.

[0067] This application embodiment can calculate the acoustic transfer function spectrum of the target vehicle's door at the target vehicle speed to generate the sound insulation performance of the door sealing strip at the target wind speed. It can also accurately locate the weak points of the sealing strip at different frequencies, avoiding blind optimization, such as adjusting the sealing strip indiscriminately only for areas with high overall noise, which wastes costs. Furthermore, based on the ATF spectrum of the target vehicle under actual high-speed conditions of 160km / h, the evaluation results can be made to fit the user's real-world driving scenario, which helps to optimize the sound insulation performance of the door sealing strip and improve the experience of drivers and passengers.

[0068] Optionally, in one embodiment of this application, solving the acoustic transfer function spectrum of the target vehicle at the target speed based on multiple third-octave bands includes: calculating the energy values ​​corresponding to the multiple third-octave bands based on the multiple third-octave bands; and generating the acoustic transfer function spectrum based on the average value of the energy values ​​corresponding to the multiple third-octave bands.

[0069] In actual implementation, when solving the acoustic transfer function spectrum of a target vehicle at a certain speed based on multiple third-octave bands, this application may, but is not limited to, first calculate the energy values ​​corresponding to multiple third-octave bands based on multiple third-octave bands, and then generate the acoustic transfer function spectrum by averaging the energy values ​​corresponding to multiple third-octave bands.

[0070] For example, this application calculates the acoustic transfer function corresponding to each one-third octave band and performs energy value averaging to obtain the ATF values ​​of all frequency points arranged in order of frequency: L 400 L 500 , ..., L 8000 Among them, L 400 L 500 ..., L 8000 This refers to the acoustic transmission function spectrum of the door seal strip of the target vehicle at a speed of 160km / h in the range of 400Hz to 8000Hz. The acoustic transmission function represents the sound transfer function between two points, and the smaller the value, the better the sound insulation.

[0071] The spectrum L 400 L 500 ..., L 8000 This includes the influence of production factors such as manufacturing and assembly errors, as well as the influence of design factors such as sealing strip thickness, compression, and contact surface, representing the sound insulation performance of high-speed automotive door sealing strips. The expression for the acoustic transmission function spectrum can be, but is not limited to, as follows:

[0072]

[0073] ...

[0074] The embodiments of this application can use the average energy of the acoustic transmission function in each one-third octave band to form the spectrum, thereby avoiding the error of the direct arithmetic mean of the logarithmic unit of the acoustic transmission function, accurately reflecting the real sound insulation differences of the door sealing strip of the target vehicle in different frequency bands, which helps to quickly locate the weak sound insulation frequency band, provide effective guidance for the optimization of the door, avoid the cost waste of indiscriminate adjustment of the entire frequency band, and thus improve the sound insulation performance of the door sealing strip.

[0075] Optionally, in one embodiment of this application, after generating the sound insulation performance of the door sealing strip of the target vehicle under the target wind speed, the method further includes: determining the sound leakage location of the door of the target vehicle based on the sound insulation difference points of the two doors of the target vehicle; when the sound leakage location of the door is blocked, obtaining the acoustic transfer function spectrum of the door under the desired production conditions, so as to generate the second sound insulation performance of the door sealing strip under the desired production conditions based on the acoustic transfer function spectrum of the door under the desired production conditions; and generating a production optimization suggestion for the door based on the difference between the second sound insulation performance and the sound insulation performance, so as to optimize the door sealing strip to meet the target production requirements according to the production optimization suggestion.

[0076] Based on the descriptions of other embodiments, it is understood that, in the process of evaluating the sound insulation performance of the door sealing strip of the target vehicle under a certain wind speed, the embodiments of this application can also obtain the weak sound insulation location of the door sealing strip and the acoustic transmission function at each frequency point.

[0077] Based on this, in some embodiments, this application can also obtain the sound insulation difference points of the two doors of the target vehicle, and thereby determine the sound leakage location of the door of the target vehicle. For example, since the car is symmetrical, the sound insulation of the left and right sides should theoretically be the same. By comparing the measuring points of the left and right doors of the car and finding the places with obvious differences, the location of the sound leakage can be determined. Then, the sound leakage location is sealed with putty, and each measuring point is compared with the surrounding adjacent measuring points to find the places with obvious differences, which can also determine the location of the sound leakage.

[0078] Then, in this embodiment of the application, while sealing the sound leakage location of the car door, the acoustic transfer function spectrum of the car door under desired production conditions can be obtained to generate the second sound insulation performance of the car door sealing strip under desired production conditions. Here, desired production conditions refer to the ideal production conditions of the car door.

[0079] Furthermore, based on the difference between the second sound insulation performance of the door seal under desired production conditions and the sound insulation performance of the door seal under a certain wind speed, production optimization suggestions for the door can be generated. These suggestions are then used to optimize the door seal to meet target production requirements. Here, the target production requirements can be understood as the door seal produced under optimized production conditions achieving its optimal product state. This optimal product state ensures that the door seal achieves the best achievable sound insulation performance at the production level. This helps to make the sound insulation performance under actual production conditions as close as possible to the second sound insulation performance under desired production conditions.

[0080] For example, this application can use modeling clay to seal the sound leakage points of the car door, and then obtain the first door outward expansion value and the second door outward expansion value under the same wind speed and test environment of the target vehicle after sealing the sound leakage points, in the same way as in the previous embodiment.

[0081] Then, when the outer span values ​​of the first and second doors of the target vehicle are equal after the sound leakage point of the door is blocked, the acoustic transfer function between multiple microphones and sound source points in the surrounding environment of the target vehicle after the sound leakage point of the door is blocked is obtained (wherein, the positions of multiple microphones and sound source points need to be consistent with the positions of multiple microphones and sound source points set in the target vehicle before the sound leakage point of the door is blocked), and the corresponding multiple one-third octave bands of the acoustic transfer function of the target vehicle after the sound leakage point of the door is blocked are generated.

[0082] Finally, based on multiple third-octave bands of the target vehicle after sealing the sound leakage points of the doors, the acoustic transfer function spectrum of the target vehicle's doors under the desired production conditions is calculated. To generate the second sound insulation performance of the door seals of the target vehicle under desired production conditions.

[0083] Among them, the acoustic transfer function spectrum of the car door under the desired production conditions does not include the influence of production factors such as manufacturing errors and assembly errors, but only includes the influence of drawing design factors such as sealing strip thickness, compression amount, and contact surface. It can effectively characterize the sound insulation performance of the car door sealing strip under ideal production conditions.

[0084] The greater the difference between the acoustic transfer function spectrum of the car door under the desired production conditions and the acoustic transfer function spectrum of the car door under a certain wind speed, the greater the production problem and the need to improve production quality. At this time, certain production optimization suggestions can be generated, such as improving manufacturing precision and assembly precision, thereby optimizing the car door sealing strip to meet certain production requirements.

[0085] This application embodiment can obtain the acoustic transmission function after the sound leakage location of the car door is blocked, compare it with the acoustic transmission function before the sound leakage location of the car door is blocked, and obtain the sound insulation effect caused by manufacturing factors through the measurement difference between the two acoustic transmission functions.

[0086] Optionally, in one embodiment of this application, after generating the second sound insulation performance of the door seal under the desired conditions based on the acoustic transfer function spectrum of the door under the desired conditions, the method further includes: obtaining the acoustic transfer function spectrum of the door under the desired design and actual production conditions by sealing the sound leakage locations of the door and the door gaps; generating the third sound insulation performance of the door seal under the desired design and actual production conditions based on the acoustic transfer function spectrum of the door under the desired design and actual production conditions; and generating design optimization suggestions for the door based on the difference between the third sound insulation performance and the second sound insulation performance, so as to optimize the door seal to meet the target design requirements according to the design optimization suggestions.

[0087] In other embodiments, this application may further generate a second sound insulation performance of the door sealing strip under desired conditions, and then seal the door gaps after sealing the sound leakage location of the target door, in order to obtain the acoustic transfer function spectrum of the door under desired design and actual production conditions. Here, desired design refers to the design of the door sealing strip to achieve optimal sound insulation performance, including but not limited to the design of the number of sealing rings and the contact area of ​​the sealing strip.

[0088] Furthermore, based on the acoustic transfer function spectrum of the door under the desired design and actual production conditions, a third sound insulation performance of the door sealing strip is generated under the same conditions. This is used to generate design optimization suggestions for the door based on the difference between the third and second sound insulation performance, thus optimizing the door sealing strip to meet the target design requirements. Here, the target design requirement can be understood as the optimal design state that the optimized door sealing strip can achieve, ensuring that the door sealing strip achieves the best achievable sound insulation performance at the design level.

[0089] For example, this application can seal all the door gaps with putty, and then obtain the first door outward expansion value and the second door outward expansion value of the target vehicle under the same wind speed as in front of the door gap and the door sound leakage location after sealing the door gap, using the same method as in the previous embodiment.

[0090] Then, when the outward expansion values ​​of the first and second doors of the target vehicle after the door sound leakage location and door gap are blocked are equal, the acoustic transfer function between multiple microphones and sound source points in the surrounding environment of the target vehicle after the door sound leakage location and door gap are obtained (wherein, the positions of multiple microphones and sound source points need to be consistent with the positions of multiple microphones and sound source points set in front of the target vehicle after the door sound leakage location and door gap are blocked), and the corresponding multiple one-third octave bands of the acoustic transfer function of the target vehicle after the door sound leakage location and door gap are generated.

[0091] Finally, based on multiple third-octave bands of the target vehicle after sealing the sound leakage points of the doors and the door gaps, the acoustic transfer function spectrum of the target vehicle's doors under the desired design and actual production conditions is solved. According to the spectrum of the acoustic transfer function The third sound insulation performance of the door seals of the target vehicle under the desired design and actual production conditions is generated.

[0092] Acoustic transfer function spectrum of the target vehicle's door under desired design and actual production conditions, after sealing the sound leakage points and door gaps. It does not include the influence of production factors such as manufacturing errors and assembly errors, nor does it include the influence of design factors such as sealing strip thickness, compression amount, and contact surface. It can effectively characterize the sound insulation performance of car door sealing strips under ideal design and actual production conditions.

[0093] The greater the difference between the acoustic transfer function spectrum of the car door under the desired design and actual production conditions and the acoustic transfer function spectrum of the car door under the desired production conditions, the greater the design problem. At this time, certain design optimization suggestions can be generated, such as increasing the number of sealing rings, increasing the contact area of ​​the sealing strip, increasing the compression amount, increasing the thickness, etc., thereby optimizing the car door sealing strip to meet certain design requirements.

[0094] In this embodiment of the application, the sound transmission function can be measured again after sealing the door gaps where sound leakage is blocked, and compared with the sound transmission function when only the door leakage is blocked. The difference between the two sound transmission functions can be used to determine the impact of design factors on sound insulation.

[0095] According to the sound insulation performance evaluation method for door sealing strips proposed in this application, under the condition that the door opening value of the target vehicle is equal under certain wind speed and certain test environment, the acoustic transfer function between the inside and outside of the target vehicle and the corresponding multiple one-third octave bands can be obtained to solve the acoustic transfer function spectrum of the door to generate the sound insulation performance of the door sealing strip. Thus, by obtaining the acoustic transfer function of the door sealing strip under the condition of high-speed door opening, the sound insulation performance of the door sealing strip can be represented, which helps to set targets, benchmark, and decompose problems. Furthermore, this application can also re-measure the acoustic transfer function by sealing the sound leakage points of the door and compare it with the acoustic transfer function of the door without sealing the sound leakage points to obtain the influence of sound insulation caused by manufacturing factors. Finally, by sealing the sound leakage points of the door and sealing the door gaps again, and comparing it with the acoustic transfer function of only sealing the sound leakage points, the influence of sound insulation caused by design factors can be obtained, thereby generating effective production optimization suggestions and design optimization suggestions to optimize the door sealing strip. This solves the problems in related technologies, such as the lack of a unified and effective evaluation method for the sound insulation performance of door seals at high speeds among most automobile companies, the difficulty in identifying the source of sound insulation problems in door seals for optimization, and the inability to meet the evaluation and optimization needs of door sound insulation performance.

[0096] Next, referring to the accompanying drawings, a sound insulation performance evaluation device for a door sealing strip according to an embodiment of this application is described.

[0097] Figure 3 This is a schematic diagram of the structure of the sound insulation performance evaluation device for the door sealing strip according to an embodiment of this application.

[0098] like Figure 3 As shown, the sound insulation performance evaluation device 10 for the door sealing strip includes: a first acquisition module 100, a first generation module 200, and an evaluation module 300.

[0099] The first acquisition module 100 is used to acquire the first door outward opening value of the target vehicle under the target wind speed and the second door outward opening value of the target vehicle under the target test environment. The first generation module 200 is used to obtain the acoustic transfer function between multiple microphones in the surrounding environment of the target vehicle and the sound source point at a preset position when the external tension value of the first door is equal to the external tension value of the second door, and generate multiple one-third octave bands corresponding to the acoustic transfer function. Evaluation module 300 is used to solve the acoustic transfer function spectrum of the target vehicle's door at the target vehicle speed based on multiple third octave bands, and to generate the sound insulation performance of the target vehicle's door sealing strip at the target wind speed based on the acoustic transfer function spectrum.

[0100] Optionally, in one embodiment of this application, it further includes: a first determining module and a second determining module.

[0101] The first determining module is used to determine the position of the external ear of the human in multiple driving positions adjacent to the door of the target vehicle based on the actual structural information of the vehicle seat before obtaining the acoustic transfer function between the microphone of the target vehicle and the sound source point at the preset position. The second determining module is used to determine the sound source point at a preset location based on the location of the human external ear in multiple locations.

[0102] Optionally, in one embodiment of this application, the evaluation module includes a calculation unit and a generation unit.

[0103] The calculation unit is used to calculate the energy value corresponding to multiple third-octave bands based on multiple third-octave bands. The generation unit is used to generate the acoustic transfer function spectrum based on the average of the energy values ​​corresponding to multiple third octaves.

[0104] Optionally, in one embodiment of this application, it further includes: a third determining module, a second obtaining module, and a first optimizing module.

[0105] The third determining module is used to determine the sound leakage location of the door of the target vehicle based on the sound insulation difference points between the two doors of the target vehicle after generating the sound insulation performance of the door sealing strip of the target vehicle under the target wind speed. The second acquisition module is used to acquire the acoustic transfer function spectrum of the car door under the desired production conditions when the sound leakage location of the car door is blocked, so as to generate the second sound insulation performance of the car door sealing strip under the desired production conditions based on the acoustic transfer function spectrum of the car door under the desired production conditions. The first optimization module is used to generate production optimization suggestions for the car door based on the difference between the second sound insulation performance and the sound insulation performance, so as to optimize the door sealing strip according to the production optimization suggestions to meet the target production requirements.

[0106] Optionally, in one embodiment of this application, it further includes: a third acquisition module, a second generation module, and a second optimization module.

[0107] The third acquisition module is used to obtain the acoustic transfer function spectrum of the door under the desired conditions after generating the second sound insulation performance of the door sealing strip under the desired conditions based on the acoustic transfer function spectrum of the door under the desired conditions, while sealing the sound leakage position of the door and the door gap of the door. The second generation module is used to generate the third sound insulation performance of the door sealing strip under the conditions of satisfying the desired design and actual production based on the acoustic transfer function spectrum of the door under the conditions of satisfying the desired design and actual production. The second optimization module is used to generate design optimization suggestions for the door based on the difference between the third sound insulation performance and the second sound insulation performance, so as to optimize the door sealing strip according to the design optimization suggestions to meet the target design requirements.

[0108] It should be noted that the explanation of the aforementioned method for evaluating the sound insulation performance of door sealing strips also applies to the sound insulation performance evaluation device for door sealing strips in this embodiment, and will not be repeated here.

[0109] The sound insulation performance evaluation device for door sealing strips proposed in this application can obtain the acoustic transfer function between the inside and outside of the target vehicle and the corresponding multiple one-third octave bands under the condition that the door opening value of the target vehicle is equal under certain wind speed and certain test environment. This allows for the calculation of the acoustic transfer function spectrum of the door to generate the sound insulation performance of the door sealing strip. Thus, by obtaining the acoustic transfer function of the door sealing strip under the condition of high-speed door opening, the sound insulation performance of the door sealing strip can be represented, which helps in setting targets, benchmarking, and decomposing problems. Furthermore, this application can also re-measure the acoustic transfer function by sealing the sound leakage points of the door and compare it with the acoustic transfer function of the door without sealing the sound leakage points to determine the impact of manufacturing factors on sound insulation. Finally, by sealing the sound leakage points of the door and sealing the door gaps, the acoustic transfer function can be re-measured and compared with the acoustic transfer function of only sealing the sound leakage points to determine the impact of design factors on sound insulation. This allows for the generation of effective production optimization suggestions and design optimization suggestions to optimize the door sealing strip. This solves the problems in related technologies, such as the lack of a unified and effective evaluation method for the sound insulation performance of door seals at high speeds among most automobile companies, the difficulty in identifying the source of sound insulation problems in door seals for optimization, and the inability to meet the evaluation and optimization needs of door sound insulation performance.

[0110] Figure 4 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include: The memory 401, the processor 402, and the computer program stored on the memory 401 and capable of running on the processor 402.

[0111] When the processor 402 executes the program, it implements the sound insulation performance evaluation method for the door sealing strip provided in the above embodiments.

[0112] Furthermore, the vehicle also includes: Communication interface 403 is used for communication between memory 401 and processor 402.

[0113] The memory 401 is used to store computer programs that can run on the processor 402.

[0114] Memory 401 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0115] If the memory 401, processor 402, and communication interface 403 are implemented independently, then the communication interface 403, memory 401, and processor 402 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized into address buses, data buses, control buses, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0116] Optionally, in a specific implementation, if the memory 401, processor 402, and communication interface 403 are integrated on a single chip, then the memory 401, processor 402, and communication interface 403 can communicate with each other through an internal interface.

[0117] Processor 402 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0118] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for evaluating the sound insulation performance of a vehicle door sealing strip.

[0119] This application also provides a computer program product, including a computer program that can run computer instructions. When the computer instructions are executed by a processor, they implement the sound insulation performance evaluation method for door sealing strips provided in this application.

[0120] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0121] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0122] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0123] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0124] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented using any one or more of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0125] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it includes one or a combination of the steps of the method embodiments.

[0126] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0127] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for evaluating sound insulation performance of a door weather strip, characterized by, The method comprises the following steps: obtaining a first door opening value of a target vehicle at a target wind speed and a second door opening value of the target vehicle in a target test environment; in the case that the first door opening value is equal to the second door opening value, obtaining an acoustic transfer function between a plurality of microphones in a surrounding environment of the target vehicle and a sound source point at a preset position, and generating a corresponding plurality of one-third octave bands of the acoustic transfer function; based on the plurality of one-third octave bands, solving an acoustic transfer function spectrum of a door of the target vehicle at the target vehicle speed, and based on the acoustic transfer function spectrum, generating a sound insulation performance of a door sealing strip of the target vehicle at the target wind speed.

2. The method of claim 1, wherein, Before obtaining the acoustic transfer function between the microphones of the target vehicle and the sound source point at the preset position, the method further comprises: determining human external ear positions of a plurality of driving positions adjacent to the door of the target vehicle based on actual structure information of a vehicle seat; determining the sound source point at the preset position based on the human external ear positions of the plurality of positions.

3. The method of claim 1, wherein, The method of solving the acoustic transfer function spectrum of the target vehicle at the target vehicle speed based on the plurality of one-third octave bands comprises: calculating energy values corresponding to the plurality of one-third octave bands according to the plurality of one-third octave bands; generating the acoustic transfer function spectrum based on an average value of the energy values corresponding to the plurality of one-third octave bands.

4. The method of claim 1, wherein, After generating the sound insulation performance of the door sealing strip of the target vehicle at the target wind speed, the method further comprises: determining a door sound leakage position of the target vehicle based on a sound insulation difference point of the doors on both sides of the target vehicle; in the case that the door sound leakage position is sealed, obtaining an acoustic transfer function spectrum of the door under expected production conditions, to generate a second sound insulation performance of the door sealing strip under the expected production conditions according to the acoustic transfer function spectrum of the door under the expected production conditions; generating a production optimization suggestion of the door based on a difference value between the second sound insulation performance and the sound insulation performance, to optimize the door sealing strip according to the production optimization suggestion to meet target production requirements.

5. The method of claim 4, wherein, After generating the second sound insulation performance of the door sealing strip under the expected conditions according to the acoustic transfer function spectrum of the door under the expected conditions, the method further comprises: in the case that the door sound leakage position and a door gap of the door are sealed, obtaining an acoustic transfer function spectrum of the door under expected design and actual production conditions; generating a third sound insulation performance of the door sealing strip under the expected design and the actual production conditions according to the acoustic transfer function spectrum of the door under the expected design and the actual production conditions; generating a design optimization suggestion of the door based on a difference value between the third sound insulation performance and the second sound insulation performance, to optimize the door sealing strip according to the design optimization suggestion to meet target design requirements.

6. A device for evaluating sound insulation performance of a door weather strip, characterized by comprising: a sound source; a microphone; a door weather strip; and a door. The method comprises: an obtaining module, configured to obtain a first door opening value of a target vehicle at a target wind speed and a second door opening value of the target vehicle in a target test environment; The generating module is configured to, in the case that the first door opening value is equal to the second door opening value, acquire an acoustic transfer function between a plurality of microphones in the surrounding environment of the target vehicle and a sound source point at a preset position, and generate a corresponding plurality of one-third octave bands of the acoustic transfer function; The evaluation module is configured to solve an acoustic transfer function spectrum of a door of the target vehicle at the target vehicle speed based on the plurality of one-third octave bands, and generate a sound insulation performance of a door weatherstrip of the target vehicle at the target wind speed based on the acoustic transfer function spectrum.

7. The apparatus of claim 6, wherein, Further comprising: The first determining module is configured to, before acquiring the acoustic transfer function between the microphones and the sound source point at the preset position of the target vehicle, determine human external ear positions of a plurality of driving positions adjacent to the door of the target vehicle based on actual structure information of a vehicle seat; The second determining module is configured to determine the sound source point at the preset position based on the human external ear positions of the plurality of positions.

8. A vehicle characterized by comprising: Comprise: A memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the sound insulation performance evaluation method of the door weatherstrip according to any one of claims 1-5.

9. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the sound insulation performance evaluation method of the door weatherstrip according to any one of claims 1-5.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed to implement the sound insulation performance evaluation method of the door weatherstrip according to any one of claims 1-5.

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