Vehicle interior abnormal noise evaluation method, system, device and readable storage medium
By driving the vehicle's horn to generate vibration excitation through an in-vehicle application and analyzing the noise signal, the problem of road dependence and human subjectivity in the evaluation of abnormal noises in the whole vehicle interior is solved, and the evaluation is achieved with high efficiency, low cost and high accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DONGFENG MOTOR GRP
- Filing Date
- 2023-04-14
- Publication Date
- 2026-06-02
AI Technical Summary
In existing technologies, the evaluation of abnormal noises in the interior of a vehicle requires driving on harsh road surfaces and relies on subjective human evaluation, resulting in high costs, low efficiency and limited accuracy.
The vehicle's infotainment system sends an excitation signal to the vehicle's ECU, which drives the vehicle's horn to generate vibration excitation. The vehicle's microphone collects noise signals and performs spectrum analysis to generate an evaluation result for interior noise.
It does not require driving on specific road surfaces, is highly efficient and unaffected by weather, is supported by objective data, has high accuracy, and is low in cost.
Smart Images
Figure CN116465645B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle inspection technology, and in particular to a method, system, device and readable storage medium for evaluating abnormal noises in the interior of a vehicle. Background Technology
[0002] With the development of the times, people are becoming increasingly quality-conscious. In the automotive sector, in particular, people are paying more and more attention to the noise and rattle performance of vehicles, to the point that the quality of these noises directly affects customers' purchasing decisions. Among various types of vehicle noises, interior noises tend to occur more frequently, easily leading to customer complaints. To avoid such problems, automakers are trying to use various testing methods to evaluate and control these noises.
[0003] Currently, the evaluation of interior noise in vehicles typically involves driving the vehicle under specific conditions on harsh road surfaces to induce vibrations in the interior. Evaluators inside the vehicle then subjectively assess the severity of these noises. This method is expensive due to the need for dedicated evaluation sites and is also limited by weather conditions, meaning evaluations cannot be conducted in the rain. Furthermore, it requires multiple evaluators working under various road conditions and conditions, resulting in time-consuming and labor-intensive evaluations, inaccurate results dependent on the evaluators' skill levels, and a lack of objective data support. Summary of the Invention
[0004] This application provides a method, system, device, and readable storage medium for evaluating abnormal noises in the interior of a vehicle, in order to solve the defects of related technologies that rely on vibration excitation generated by the vehicle driving on rough roads and subjective evaluation of abnormal noises by humans.
[0005] Firstly, a method for evaluating abnormal noises in the interior of a vehicle is provided, including the following steps:
[0006] Based on a preset vehicle application, an excitation signal corresponding to the target excitation mode is sent to the vehicle ECU, so that the vehicle ECU can drive the vehicle horn corresponding to the target excitation mode to generate vibration excitation, thereby exciting the interior components inside the vehicle to vibrate.
[0007] During the vibration of interior components, in-vehicle noise signals are acquired using the vehicle microphone.
[0008] The in-vehicle noise signal is analyzed by a vehicle-mounted application to generate an evaluation result of interior noise corresponding to the target excitation mode.
[0009] In some embodiments, prior to the step of sending an excitation signal corresponding to the target excitation mode to the vehicle ECU based on a preset vehicle application, the method further includes:
[0010] Multiple target incentive patterns are constructed based on a combination of incentive frequency patterns and incentive location patterns;
[0011] Multiple target incentive modes are stored in the vehicle application so that the vehicle application can generate incentive signals corresponding to the target incentive modes.
[0012] In some embodiments, the excitation frequency mode includes white noise excitation, pink noise excitation, frequency sweep excitation, single frequency excitation, and constant bandwidth excitation, and the excitation position mode includes full excitation, single excitation, corner excitation, diagonal excitation, and edge excitation.
[0013] In some embodiments, the step of performing spectral analysis on the in-vehicle noise signal via an in-vehicle application to generate an evaluation result of interior noise abnormalities corresponding to the target excitation mode includes:
[0014] The vehicle's in-vehicle noise signal is analyzed by a spectral analysis using an in-vehicle application to determine whether any abnormal noises occur inside the vehicle.
[0015] If so, then an interior noise evaluation result corresponding to the target excitation mode will be generated based on the time of the noise occurrence, the target excitation mode, and the spectrum analysis results.
[0016] In some embodiments, the vehicle microphone includes a driver's microphone, a passenger's microphone, and a rear microphone, and the vehicle speaker includes a main instrument panel speaker, a door panel speaker, and a rear partition panel speaker.
[0017] In some embodiments, generating interior noise evaluation results corresponding to the target excitation mode based on the time of noise occurrence, the target excitation mode, and the spectrum analysis results includes:
[0018] Determine the target excitation frequency that caused the abnormal noise and its corresponding target vehicle horn based on the time of the abnormal noise occurrence and the target excitation mode.
[0019] The total sound pressure level above a preset frequency corresponding to each target vehicle microphone is calculated based on the spectrum analysis results. The target vehicle microphone is a vehicle microphone that contains noise signals above a preset frequency in the in-vehicle noise signal.
[0020] The target interior component causing the abnormal noise is determined based on the total sound pressure level above the preset frequency corresponding to the target vehicle microphone and the location of the target vehicle speaker.
[0021] The target interior trim parts, target excitation frequency, target vehicle horn, target vehicle microphone, and the time of occurrence of the abnormal noise are used as the evaluation results of interior noise corresponding to the target excitation mode.
[0022] In some embodiments, determining the target interior component causing the abnormal noise based on the total sound pressure level above a preset frequency corresponding to the target vehicle microphone and the location of the target vehicle speaker includes:
[0023] The target vehicle microphones are sorted in descending order of the total sound pressure level above a preset frequency.
[0024] The target interior component causing the abnormal noise is determined based on the location of the first N target vehicle microphones and target vehicle speakers, where N is a positive integer.
[0025] Secondly, a whole vehicle interior noise evaluation system is provided, including: vehicle application, whole vehicle ECU, vehicle speaker and vehicle microphone;
[0026] The vehicle application sends an excitation signal corresponding to the target excitation mode to the vehicle ECU, so that the vehicle ECU can drive the vehicle horn corresponding to the target excitation mode to generate vibration excitation, thereby exciting the interior components inside the vehicle to vibrate.
[0027] During the vibration of interior components, in-vehicle noise signals are acquired using the vehicle microphone.
[0028] The in-vehicle noise signal is analyzed by a vehicle-mounted application to generate an evaluation result of interior noise corresponding to the target excitation mode.
[0029] In some embodiments, the system further includes a building module for:
[0030] Multiple target incentive patterns are constructed based on a combination of incentive frequency patterns and incentive location patterns;
[0031] Multiple target incentive modes are stored in the vehicle application so that the vehicle application can generate incentive signals corresponding to the target incentive modes.
[0032] In some embodiments, the excitation frequency mode includes white noise excitation, pink noise excitation, frequency sweep excitation, single frequency excitation, and constant bandwidth excitation, and the excitation position mode includes full excitation, single excitation, corner excitation, diagonal excitation, and edge excitation.
[0033] In some embodiments, the in-vehicle noise signal is analyzed by a vehicle-mounted application to determine whether any abnormal noises occur inside the vehicle.
[0034] If so, then an interior noise evaluation result corresponding to the target excitation mode will be generated based on the time of the noise occurrence, the target excitation mode, and the spectrum analysis results.
[0035] In some embodiments, the vehicle microphone includes a driver's microphone, a passenger's microphone, and a rear microphone, and the vehicle speaker includes a main instrument panel speaker, a door panel speaker, and a rear partition panel speaker.
[0036] In some embodiments, the in-vehicle application is specifically used for:
[0037] Determine the target excitation frequency that caused the abnormal noise and its corresponding target vehicle horn based on the time of the abnormal noise occurrence and the target excitation mode.
[0038] The total sound pressure level above a preset frequency corresponding to each target vehicle microphone is calculated based on the spectrum analysis results. The target vehicle microphone is a vehicle microphone that contains noise signals above a preset frequency in the in-vehicle noise signal.
[0039] The target interior component causing the abnormal noise is determined based on the total sound pressure level above the preset frequency corresponding to the target vehicle microphone and the location of the target vehicle speaker.
[0040] The target interior trim parts, target excitation frequency, target vehicle horn, target vehicle microphone, and the time of occurrence of the abnormal noise are used as the evaluation results of interior noise corresponding to the target excitation mode.
[0041] In some embodiments, the in-vehicle application is specifically used for:
[0042] The target vehicle microphones are sorted in descending order of the total sound pressure level above a preset frequency.
[0043] The target interior component causing the abnormal noise is determined based on the location of the first N target vehicle microphones and target vehicle speakers, where N is a positive integer.
[0044] Thirdly, a vehicle interior noise evaluation device is provided, comprising: a memory and a processor, wherein the memory stores at least one instruction, and the at least one instruction is loaded and executed by the processor to realize the aforementioned vehicle interior noise evaluation method.
[0045] Fourthly, a computer-readable storage medium is provided, which stores a computer program that, when executed by a processor, implements the aforementioned method for evaluating abnormal noises in the interior of a vehicle.
[0046] This application provides a method, system, device, and readable storage medium for evaluating interior noise in a vehicle. The method includes sending an excitation signal corresponding to a target excitation mode to the vehicle ECU based on a preset vehicle application. The vehicle ECU then drives a vehicle-mounted horn corresponding to the target excitation mode to generate vibration excitation, thereby exciting vibration of interior components. During the vibration of the interior components, an in-vehicle noise signal is acquired using an in-vehicle microphone. The in-vehicle application performs spectral analysis on the in-vehicle noise signal to generate an evaluation result for interior noise corresponding to the target excitation mode. This application generates an excitation signal through the vehicle application and drives the vehicle-mounted horn to generate vibration excitation based on the vehicle ECU, thereby exciting vibration of interior components. Furthermore, by analyzing the differences in the spectrum of the noise signal collected by the in-vehicle microphone through the vehicle application, the interior component causing the noise can be quickly located, thus achieving an evaluation of the interior noise. Therefore, this application does not require the vehicle to be driven on specific harsh road surfaces and is not limited by weather conditions. It is not only low-cost and highly efficient, but also has objective data support and does not rely on the professional capabilities of the evaluators, resulting in higher evaluation accuracy. Attached Figure Description
[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0048] Figure 1 A flowchart illustrating a method for evaluating abnormal noises in the interior of a vehicle, provided as an embodiment of this application;
[0049] Figure 2 A schematic diagram illustrating the deployment of the vehicle-mounted microphone and vehicle-mounted speaker, as well as their interaction with other modules, provided for embodiments of this application.
[0050] Figure 3 This is a schematic diagram of the structure of the vehicle interior noise evaluation system provided in the embodiments of this application;
[0051] Figure 4 This is a structural schematic diagram of a vehicle interior noise evaluation device provided in an embodiment of this application. Detailed Implementation
[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0053] This application provides a method, system, device, and readable storage medium for evaluating abnormal noises in the interior of a vehicle. It can solve the defects of related technologies that rely on vibration excitation generated by the vehicle driving on rough roads and subjective evaluation of abnormal noises by humans.
[0054] Figure 1 This application provides a method for evaluating abnormal noises in the interior of a vehicle, comprising the following steps:
[0055] Step S10: Based on the preset vehicle application, send an excitation signal corresponding to the target excitation mode to the vehicle ECU (Electronic Control Unit), so that the vehicle ECU can drive the vehicle horn corresponding to the target excitation mode to generate vibration excitation, thereby exciting the interior components of the vehicle to vibrate; wherein, the vehicle horn includes the main instrument panel horn, the door panel horn, and the rear partition panel horn.
[0056] Exemplary and understandable, "vehicle infotainment system" refers to an in-vehicle terminal installed on the vehicle's dashboard, possessing multiple functions such as online navigation, traffic information, travel guides, shopping, and entertainment. In this embodiment, a pre-built application for evaluating interior noise will be integrated into the vehicle infotainment system to form a vehicle infotainment application. Based on this application, interaction with the vehicle's ECU, in-vehicle microphone, etc., and data analysis during the evaluation of interior noise will be achieved.
[0057] Understandably, the main functions of the in-vehicle infotainment application are as follows: First, it generates various excitation mode signals and sends them to the vehicle ECU, which then sends them to the vehicle horn. Second, it receives the in-vehicle noise signal (transmitted by the vehicle microphone) from the vehicle ECU, performs spectral analysis on it, and determines whether interior noise has occurred based on the analysis results. If noise is detected, it generates an evaluation result corresponding to the current excitation mode. Third, after the evaluation is completed, the final evaluation result list is displayed on the in-vehicle infotainment system for the evaluator to view. When the evaluator clicks on a certain evaluation result, the in-vehicle infotainment application will regenerate the corresponding excitation mode signal, causing the vehicle horn to sound and drive the interior components to vibrate, allowing the evaluator to personally evaluate the result.
[0058] Therefore, when evaluating interior noise, the vehicle to be evaluated should be moved to a semi-anechoic chamber or a place with low ambient noise. The vehicle should be stationary, and any debris inside should be removed. The vehicle should be powered on but not started (the engine should not be started). The vehicle's infotainment system should be turned on, and all doors, door windows, and sunroof should be closed. Then, the vehicle's infotainment application should be opened. The evaluator should leave the vehicle and close the doors. At this point, the vehicle's infotainment application will generate an excitation signal corresponding to the target excitation mode and send this excitation signal to the vehicle's ECU. The vehicle's ECU will then drive the corresponding vehicle horn to generate vibration excitation based on this excitation signal, thereby exciting the interior components inside the vehicle to vibrate.
[0059] It should be noted that, in this embodiment, the main function of the vehicle ECU is to communicate with the vehicle infotainment application to receive the excitation signal sent by the vehicle infotainment application and send it to the vehicle speaker; at the same time, it is also used to receive the in-vehicle noise signal collected by the vehicle microphone and send it to the vehicle infotainment application.
[0060] Furthermore, this embodiment utilizes an existing in-vehicle speaker (i.e., a vehicle-mounted speaker) to generate vibration excitation, causing the interior trim components to vibrate. See also... Figure 2 As shown, the function of a car horn is to receive signals sent by the vehicle's ECU and emit sound signals with a specific frequency structure to excite various interior components inside the vehicle to vibrate. It should be understood that the number of car horns varies depending on the type of vehicle. Generally, horns mounted on both sides of the main instrument panel and the four door panels are always present. Furthermore, for sedans, horns mounted on both sides of the rear partition panel are also present. Figure 2 The vehicle speakers S1-S8 are always present.
[0061] Furthermore, before the step of sending an excitation signal corresponding to the target excitation mode to the vehicle ECU based on a preset vehicle application, the method further includes:
[0062] Multiple target excitation modes are constructed based on the combination of excitation frequency mode and excitation position mode. The excitation frequency mode includes white noise excitation, pink noise excitation, frequency sweep excitation, single frequency excitation and constant bandwidth excitation. The excitation position mode includes full excitation, single excitation, corner excitation, diagonal excitation and edge excitation.
[0063] Multiple target incentive modes are stored in the vehicle application so that the vehicle application can generate incentive signals corresponding to the target incentive modes.
[0064] As an example, in this embodiment, the various excitation mode signals generated by the vehicle infotainment application are composed of excitation frequency mode and excitation position mode. The excitation frequency mode refers to the frequency structure (components) of the excitation signal sent by the vehicle infotainment application to the vehicle horn via the vehicle ECU. It should be understood that, generally speaking, abnormal noises in automotive interiors are high-frequency noises caused by low-frequency vibration excitation, meaning their excitation frequency is relatively low. Therefore, in this embodiment, the upper limit of the excitation frequency can preferably be set to 200Hz, while the lower limit is determined by the performance of the vehicle horn, such as 50Hz.
[0065] It should be noted that by analyzing the frequency characteristics of the uneven road excitation experienced by the vehicle during the evaluation of abnormal road noise in actual vehicles, five excitation frequency modes can be obtained, namely white noise excitation, pink noise excitation, sweep frequency excitation, single frequency excitation, and constant bandwidth excitation. These excitation frequency modes can be numbered, such as excitation frequency mode 1 being white noise excitation, etc. Of course, the types and number of excitation frequency modes can be adjusted according to actual needs, which is not limited here.
[0066] Specifically, white noise excitation refers to a spectrum that is a flat line within the excitation frequency range, meaning that the amplitude of each frequency component is equal within this range. Pink noise excitation, on the other hand, refers to a spectrum that is a sloping line within the excitation frequency range, where the amplitude decreases as the frequency increases, and the noise energy decreases by 3 dB for every octave. Both white noise and pink noise excitations are real-world phenomena in actual vehicle driving. For example, when a vehicle experiences a significant impact from the road surface, its excitation frequency approximates white noise; while when the vehicle is traveling on rough roads, its excitation frequency approximates pink noise.
[0067] Frequency sweep excitation refers to the excitation frequency linearly increasing from its lower limit to its upper limit within a certain time period, such as increasing from 50Hz to 200Hz within 30 seconds. Single-frequency excitation refers to the excitation frequency being a single frequency for a fixed short period of time, and the single frequency increasing sequentially with time, such as 50Hz for 0-1s, 51Hz for 1-2s, and 52Hz for 2-3s. The fixed duration can be set by the user, such as 1s or 2s, and the frequency step size (i.e., the frequency difference between adjacent short periods) can also be set by the user, such as 0.5Hz or 1Hz. It can be understood that single-frequency excitation can better detect the resonance characteristics of various interior components.
[0068] Constant bandwidth excitation combines the characteristics of white noise excitation and single-frequency excitation. Specifically, it uses pseudo-white noise excitation for a short, fixed duration, and the bandwidth of the pseudo-white noise excitation frequency (i.e., the upper limit frequency minus the lower limit frequency of the pseudo-white noise) is fixed. As time increases, the pseudo-white noise excitation frequency also increases sequentially. For example, the excitation frequency range is 50-60Hz for 0-2s, 60-70Hz for 2-4s, and 70-80Hz for 4-6s, etc. The fixed duration can be set manually, such as 1s, 2s, etc., and the bandwidth of the pseudo-white noise excitation frequency can also be set manually, such as 5Hz, 10Hz, etc.
[0069] It should be understood that among the above five excitation frequency modes, the excitation frequency structure of white noise excitation and pink noise excitation does not change with time during their excitation execution time. This characteristic can be called non-time-varying excitation frequency. On the other hand, sweep frequency excitation, single frequency excitation, and constant bandwidth excitation are time-varying excitation frequencies, that is, the excitation frequency structure at certain moments is different from the excitation frequency structure at other moments during their excitation execution time.
[0070] Furthermore, the excitation position pattern refers to the distribution of the sound-emitting horn positions. It should be noted that this embodiment, through analysis of the force distribution on the four tires during real-world road noise evaluation, yielded five excitation position patterns: full excitation, single excitation, corner excitation, diagonal excitation, and side excitation. These excitation position patterns can be numbered, such as excitation position pattern 1 being full excitation, etc. Of course, the types and number of excitation position patterns can be adjusted according to actual needs, and this is not limited here.
[0071] Specifically, full excitation simulates the scenario where all four tires of a vehicle are subjected to significant excitation during actual driving. In this case, all interior trim panels are also subjected to significant excitation; that is, full excitation means all the car's speakers sound simultaneously. Single excitation simulates the scenario where interior trim panels are subjected to partial excitation during actual driving. In this case, a specific section of the interior trim panel is subjected to significant excitation; that is, single excitation means the car's speakers sound sequentially and individually. Figure 2 As shown, from S1 to S8, the eight vehicle speakers will sound individually in sequence. For example, after vehicle speaker S1 has completed the excitation of all excitation frequency modes, it will stop sounding, and vehicle speaker S2 will then perform the excitation of all excitation frequency modes, and so on.
[0072] Corner excitation simulates a situation where a tire experiences significant excitation during actual driving, causing a corresponding interior panel in a corner of the vehicle to also experience significant excitation. In other words, corner excitation refers to the sequential, individual sound output from the various speaker assemblies in different corners of the vehicle. For example... Figure 2As shown, the sound is emitted sequentially from the front left corner (speaker groups S1 and S3) → front right corner (speaker groups S2 and S4) → rear left corner (speaker groups S5 and S7) → rear right corner (speaker groups S6 and S8), causing the four corner speaker groups to emit sound individually. For example, after the front left corner speaker group has completed the excitation of all excitation frequency modes, it stops emitting sound, and the front right corner speaker group continues to execute the excitation of all excitation frequency modes, and so on.
[0073] Diagonal excitation simulates the situation where two opposite tires are subjected to significant excitation during actual driving, such as when a vehicle is driving on a winding road. In this case, the interior trim panels on two opposite corners of the vehicle are subjected to significant excitation. Diagonal excitation refers to the sequential, individual sound output from each diagonal speaker group within the vehicle. Figure 2 As shown, from the diagonal (speaker groups S1, S3, S6 and S8) to the sub-diagonal (speaker groups S2, S4, S5 and S7), the two diagonal speaker groups emit sound sequentially and individually; for example, after the diagonal speaker group has completed the excitation of all excitation frequency modes, it stops emitting sound, and the sub-diagonal speaker group then executes the excitation of all excitation frequency modes.
[0074] Side excitation simulates a scenario where one side of the tires experiences greater excitation during actual driving. For example, if the two left tires are driving on a rough road while the two right tires are driving on a flat road, the left-side interior trim panel inside the vehicle would experience greater excitation. Therefore, side excitation refers to the sequential, individual sound output from each side of the vehicle's speaker assembly. Figure 2 As shown, from the front (speaker groups S1 and S2) → the back (speaker groups S7 and S8) → the left (speaker groups S3 and S5) → the right (speaker groups S4 and S6), the four speaker groups on each side emit sound sequentially and individually; for example, after the front speaker group has completed the excitation of all excitation frequency modes, it stops emitting sound, and the back speaker group then executes the excitation of all excitation frequency modes, etc.
[0075] It should be understood that among the above five incentive position modes, the incentive position of the full incentive does not change with time during its execution time, and this characteristic can be called the time-invariant incentive position; while the single incentive, corner incentive, diagonal incentive, and edge incentive are time-varying incentive positions, that is, the incentive position at some time is different from the incentive position at other times during its execution time.
[0076] Since there are 5 excitation frequency modes and 5 excitation position modes in this embodiment, they can be combined to obtain 25 target excitation modes. These 25 target excitation modes can be numbered sequentially, such as target excitation mode 1, etc. Therefore, after determining the various target excitation modes, the vehicle-mounted application can generate excitation signals corresponding to each target excitation mode.
[0077] Step S20: During the vibration of the interior components, the in-vehicle noise signal is acquired based on the vehicle microphone; wherein the vehicle microphone includes the driver's microphone, the passenger's microphone and the rear microphone.
[0078] As an example, it is understandable that noise signals will inevitably be generated during the vibration of interior components. In this embodiment, an existing in-vehicle microphone (i.e., an onboard microphone) will be used to acquire the in-vehicle noise signal and send it to the vehicle's ECU. See also... Figure 2 As shown, the main function of the in-vehicle microphone is to collect noise signals inside the vehicle and transmit these signals to the vehicle's ECU. It should be noted that the number of in-vehicle microphones varies depending on the type of vehicle. However, as vehicles become increasingly intelligent, generally, there is a driver's microphone, a passenger's microphone, and two microphones on the left and right sides of the rear seats, all installed on the headliner or other trim panels. Figure 2 The microphones M1 to M4 shown are always present. Therefore, in this embodiment, these four vehicle-mounted microphones will be preferably used to detect in-vehicle noise signals.
[0079] Therefore, it can be seen that the vehicle application, vehicle ECU, vehicle speaker and vehicle microphone in this embodiment are all built into the vehicle without the need for additional hardware, and all of the above hardware is powered by the vehicle battery (i.e., storage battery or power battery).
[0080] Step S30: Perform spectrum analysis on the in-vehicle noise signal through the vehicle application to generate an evaluation result of interior noise corresponding to the target excitation mode.
[0081] As an example, it is understandable that during the evaluation process, while the vehicle horn is emitting sound, all the vehicle microphones are simultaneously collecting in-vehicle noise data, and this data is transmitted to the vehicle's infotainment application via the vehicle ECU. Therefore, in this embodiment, the infotainment application receives the in-vehicle noise signal (transmitted by the vehicle microphones) sent by the vehicle ECU and performs spectral analysis on it; then, based on the analysis results, it determines whether any interior noise has occurred; if noise has occurred, it records the corresponding excitation mode number, the time of occurrence of the noise, the microphone number sequence, and the target interior component as the evaluation result of the current excitation mode. During the evaluation process, every short interval (e.g., 0.5 seconds), the infotainment application performs spectral analysis on the in-vehicle noise signal within that short interval for each vehicle microphone.
[0082] Furthermore, after the evaluation is completed, the in-vehicle application will display a final list of evaluation results on the in-vehicle screen for the evaluator to view. It should be noted that the list of evaluation results contains multiple results, each displaying the excitation mode number when the abnormal noise occurred, the time of the abnormal noise, and microphone number sequence information. When the evaluator clicks on a specific evaluation result, the in-vehicle application will regenerate the corresponding excitation mode signal, causing the vehicle's horn to sound and drive the interior components to vibrate. This allows the evaluator to personally assess the issue. By utilizing the microphone number sequence information in the evaluation results, the evaluator can quickly pinpoint the interior component causing the abnormal noise, thus providing an auxiliary judgment method. Therefore, this embodiment, by analyzing the differences in the noise signal spectrum collected by the in-vehicle microphones, can quickly pinpoint the interior component causing the abnormal noise without requiring on-road testing, is not limited by weather, has low evaluation costs, is convenient and efficient, and is supported by objective data, resulting in higher evaluation accuracy.
[0083] Furthermore, the step of performing spectral analysis on the in-vehicle noise signal through the vehicle application to generate an evaluation result of interior noise abnormalities corresponding to the target excitation mode includes:
[0084] The vehicle's in-vehicle noise signal is analyzed by a spectral analysis using an in-vehicle application to determine whether any abnormal noises occur inside the vehicle.
[0085] If so, then an interior noise evaluation result corresponding to the target excitation mode will be generated based on the time of the noise occurrence, the target excitation mode, and the spectrum analysis results.
[0086] For example, regarding abnormal noises in automotive interiors, they are generally high-frequency noises caused by low-frequency vibration excitation. Therefore, in this embodiment, the upper limit of the excitation frequency is preferably set to 200Hz. Thus, after performing spectrum analysis on the in-vehicle noise signal through the vehicle's infotainment application, if no frequency components above 200Hz appear in the spectrum analysis results, it can be determined that no abnormal noise has occurred, and the evaluation of abnormal noise under the next target excitation mode continues. However, if frequency components above 200Hz appear in the spectrum analysis results, it can be determined that some interior components have caused abnormal noises. After determining that an abnormal noise has occurred, the evaluation result of the interior abnormal noise under the current excitation mode is generated based on the time of occurrence of the abnormal noise, the target excitation mode, and the spectrum analysis results. At the same time, the corresponding excitation mode number, the time of occurrence of the abnormal noise, and the microphone number sequence can be recorded and stored in the vehicle's infotainment application to provide data support for the evaluation result of the current excitation mode.
[0087] It's important to note that the time of occurrence of the abnormal noise refers to relative time, not absolute time in the real world—that is, the elapsed period after the vehicle's infotainment application begins sending the excitation mode signal. This information is recorded to more accurately determine the more detailed information of the excitation mode corresponding to the time of the abnormal noise, thereby improving evaluation efficiency. Understandably, in excitation frequency modes, some modes use time-varying excitation frequencies, and in excitation location modes, some modes use time-varying excitation locations. Therefore, based on these characteristics and utilizing the information of the time of occurrence of the abnormal noise, we can more accurately determine the more detailed information of the excitation mode corresponding to that time, thus improving evaluation efficiency.
[0088] For example, if a certain target excitation mode is a combination of single-frequency excitation and single excitation, once the time when the abnormal noise occurs is determined, it can be determined that when the excitation frequency is at a certain frequency and when a certain vehicle horn is sounding, some interior parts will experience abnormal noise. However, if the information of the time when the abnormal noise occurs is not available, it is impossible to determine at which excitation frequency and when a certain vehicle horn is sounding, some interior parts will experience abnormal noise.
[0089] Furthermore, the step of generating interior noise evaluation results corresponding to the target excitation mode based on the time of noise occurrence, the target excitation mode, and the spectrum analysis results includes:
[0090] Determine the target excitation frequency that caused the abnormal noise and its corresponding target vehicle horn based on the time of the abnormal noise occurrence and the target excitation mode.
[0091] The total sound pressure level above a preset frequency corresponding to each target vehicle microphone is calculated based on the spectrum analysis results. The target vehicle microphone is a vehicle microphone that contains noise signals above a preset frequency in the in-vehicle noise signal.
[0092] The target interior component causing the abnormal noise is determined based on the total sound pressure level above the preset frequency corresponding to the target vehicle microphone and the location of the target vehicle speaker.
[0093] The target interior trim parts, target excitation frequency, target vehicle horn, target vehicle microphone, and the time of occurrence of the abnormal noise are used as the evaluation results of interior noise corresponding to the target excitation mode.
[0094] In this exemplary embodiment, after determining the time of the abnormal noise occurrence, the target excitation frequency that triggers the abnormal noise and the target vehicle horn that emits sound at the time of the abnormal noise are determined according to the time of the abnormal noise occurrence and the excitation frequency mode and excitation position mode in the target excitation mode. For example, the target excitation mode is single-frequency excitation (e.g., 51Hz) and side excitation. Assuming the time of the abnormal noise occurrence is 5 minutes and 10 seconds, the corresponding target excitation frequency is 51Hz. The target vehicle microphones include M1, M2, and M4. Then, M1, M2, and M4 constitute a microphone number sequence. That is, this microphone number sequence is the set of vehicle microphone numbers corresponding to the data with frequency components above 200Hz in the spectrum analysis results under the current target excitation mode. It is called a set because there may be more than one microphone number, that is, within a certain short period of time, the spectrum analysis results of the data collected by more than one vehicle microphone contain frequency components above 200Hz.
[0095] It should be noted that if multiple excitation modes are used to conduct sequential detection and evaluation of abnormal noises in the vehicle interior in an uninterrupted manner, then it is only necessary to determine the target excitation frequency that caused the abnormal noise and its corresponding target vehicle horn based on the time when the abnormal noise occurred.
[0096] Then, the total sound pressure level above the preset frequency corresponding to each target vehicle microphone in the microphone number sequence is calculated. Since the order of the total sound pressure level can further characterize the interior parts that may cause abnormal noise, the target interior parts causing abnormal noise can be determined by combining the total sound pressure level above the preset frequency of the target vehicle microphone and the location of the target vehicle speaker. Finally, the target interior parts, target excitation frequency, target vehicle speaker, target vehicle microphone, and time of abnormal noise occurrence are used as the interior abnormal noise evaluation results corresponding to the target excitation mode.
[0097] Furthermore, determining the target interior component causing the abnormal noise based on the total sound pressure level above a preset frequency corresponding to the target vehicle microphone and the location of the target vehicle speaker includes:
[0098] The target vehicle microphones are sorted in descending order of the total sound pressure level above a preset frequency.
[0099] The target interior component causing the abnormal noise is determined based on the location of the first N target vehicle microphones and target vehicle speakers, where N is a positive integer.
[0100] As an example, in this embodiment, when there are multiple target vehicle microphones, the total sound pressure level (SPL) above 200Hz is calculated based on the spectral analysis results of each target vehicle microphone, and these total SPL values are sorted in descending order. Then, the target vehicle microphone number corresponding to the highest total SPL value is placed first, the target vehicle microphone number corresponding to the second highest total SPL value is placed second, and so on, to form a microphone numbering sequence. For example, if the target excitation mode is single-frequency excitation (e.g., 51Hz) and side excitation, and the target vehicle microphones are M1, M2, and M4, assuming the total SPL value of M1 is A1, the total SPL value of M2 is A2, and the total SPL value of M4 is A3, and A3 < A1 < A2, then the microphone numbering sequence is (M2, M1, M4).
[0101] The purpose of sorting the target vehicle microphones is to facilitate the quick identification of the interior trim parts causing the abnormal noise. Specifically, the order of the microphone numbers determines the distance between the noiseing trim parts and their corresponding target microphones. For example, the target microphone at the first position in the microphone number sequence is closest to the noiseing trim part; the second microphone is the next closest. Therefore, by determining the locations of the first N target microphones and the target vehicle speaker, the target interior trim part causing the abnormal noise can be accurately identified. The specific value of N can be determined based on actual needs and is not limited here.
[0102] For example, if the target car speakers are S4 and S6, and the microphone number sequence is (M2, M1, M4), then the interior trim parts closest to the target car speakers S4 and the target car microphone M2 can be used as the target interior trim parts. Of course, the interior trim parts closest to the target car speakers S4 and the target car microphone M1 can also be used as alternative target interior trim parts.
[0103] In summary, this embodiment constructs five excitation frequency modes by analyzing the frequency characteristics of the uneven road excitation experienced by the vehicle during real-world road noise evaluation. It also constructs five excitation position modes by analyzing the force distribution on the four tires during the same evaluation. These excitation frequency and position modes are then combined to construct 25 target excitation modes. The vehicle's infotainment system generates excitation signals corresponding to these 25 target excitation modes, which are then sent to the vehicle's horn assembly via the vehicle's ECU to generate vibration excitation, causing the interior components to vibrate. The vehicle's microphone assembly collects in-vehicle noise signals, and the infotainment system performs spectrum analysis. Based on the spectrum analysis results and the characteristics of the interior noise, it determines whether any interior components are making noise and stores the evaluation results (such as the excitation mode number when the noise occurs, the time of occurrence, microphone number sequence information, and the target interior component) on the infotainment system. When the evaluator clicks on the evaluation results on the infotainment system, the system regenerates the corresponding excitation mode for the evaluator to assess. This utilizes the microphone number sequence information from the evaluation results to allow the evaluator to quickly pinpoint the interior component causing the noise, thus providing an auxiliary judgment.
[0104] It should be noted that the above evaluation method can also be used to evaluate abnormal noises in the exterior of the vehicle. The evaluation method can be adapted to the characteristics of abnormal noises in the exterior of the vehicle.
[0105] See Figure 3 As shown in the embodiment of this application, a vehicle interior noise evaluation system is also provided, including: a vehicle application, a vehicle ECU, a vehicle speaker, and a vehicle microphone;
[0106] The vehicle application sends an excitation signal corresponding to the target excitation mode to the vehicle ECU, so that the vehicle ECU can drive the vehicle horn corresponding to the target excitation mode to generate vibration excitation, thereby exciting the interior components inside the vehicle to vibrate.
[0107] During the vibration of interior components, in-vehicle noise signals are acquired using the vehicle microphone.
[0108] The in-vehicle noise signal is analyzed by a vehicle-mounted application to generate an evaluation result of interior noise corresponding to the target excitation mode.
[0109] Furthermore, the system also includes a building module for:
[0110] Multiple target incentive patterns are constructed based on a combination of incentive frequency patterns and incentive location patterns;
[0111] Multiple target incentive modes are stored in the vehicle application so that the vehicle application can generate incentive signals corresponding to the target incentive modes.
[0112] Furthermore, the excitation frequency modes include white noise excitation, pink noise excitation, frequency sweep excitation, single frequency excitation, and constant bandwidth excitation, and the excitation position modes include full excitation, single excitation, corner excitation, diagonal excitation, and edge excitation.
[0113] Furthermore, the in-vehicle noise signal is analyzed by spectrum analysis using the vehicle infotainment application to determine whether any abnormal noises occur inside the vehicle.
[0114] If so, then an interior noise evaluation result corresponding to the target excitation mode will be generated based on the time of the noise occurrence, the target excitation mode, and the spectrum analysis results.
[0115] Furthermore, the vehicle microphones include a driver's microphone, a passenger's microphone, and a rear microphone, and the vehicle speakers include a main instrument panel speaker, a door panel speaker, and a rear partition panel speaker.
[0116] Furthermore, the in-vehicle application is specifically used for:
[0117] Determine the target excitation frequency that caused the abnormal noise and its corresponding target vehicle horn based on the time of the abnormal noise occurrence and the target excitation mode.
[0118] The total sound pressure level above a preset frequency corresponding to each target vehicle microphone is calculated based on the spectrum analysis results. The target vehicle microphone is a vehicle microphone that contains noise signals above a preset frequency in the in-vehicle noise signal.
[0119] The target interior component causing the abnormal noise is determined based on the total sound pressure level above the preset frequency corresponding to the target vehicle microphone and the location of the target vehicle speaker.
[0120] The target interior trim parts, target excitation frequency, target vehicle horn, target vehicle microphone, and the time of occurrence of the abnormal noise are used as the evaluation results of interior noise corresponding to the target excitation mode.
[0121] Furthermore, the in-vehicle application is specifically used for:
[0122] The target vehicle microphones are sorted in descending order of the total sound pressure level above a preset frequency.
[0123] The target interior component causing the abnormal noise is determined based on the location of the first N target vehicle microphones and target vehicle speakers, where N is a positive integer.
[0124] It should be noted that those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the system and its components described above can be referred to the corresponding processes in the aforementioned embodiments of the vehicle interior noise evaluation method, and will not be repeated here.
[0125] The system provided in the above embodiments can be implemented as a computer program, which can be used in, for example... Figure 4 The vehicle interior noise evaluation device shown is running.
[0126] This application embodiment also provides a vehicle interior noise evaluation device, including: a memory, a processor and a network interface connected via a system bus, wherein the memory stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement all or part of the steps of the aforementioned vehicle interior noise evaluation method.
[0127] The network interface is used for network communication, such as sending assigned tasks. Those skilled in the art will understand that... Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.
[0128] A processor can be a CPU, or other general-purpose processors, DSPs (Digital Signal Processors), ASICs (Application Specific Integrated Circuits), FPGAs (Field Programmable Gate Arrays), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. A general-purpose processor can be a microprocessor, or any conventional processor. The processor is the control center of a computer device, connecting all parts of the computer device through various interfaces and lines.
[0129] Memory can be used to store computer programs and / or modules. The processor implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and by accessing data stored in the memory. Memory can mainly include a program storage area and a data storage area. The program storage area can store the operating system, application programs required for at least one function (such as video playback, image playback, etc.), etc.; the data storage area can store data created based on the use of the mobile phone (such as video data, image data, etc.). Furthermore, memory can include high-speed random access memory (RAM), and can also include non-volatile memory, such as hard disks, RAM, plug-in hard disks, SMC (SmartMediaCard), SD (SecureDigital) cards, flash memory cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.
[0130] This application also provides a computer-readable storage medium storing a computer program thereon. When the computer program is executed by a processor, it implements all or part of the steps of the aforementioned method for evaluating abnormal noises in the interior of a vehicle.
[0131] The embodiments of this application can implement all or part of the aforementioned processes, or they can be accomplished by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various methods described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, ROM (Read-Only memory), RAM (Random Access Memory), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added to or subtracted according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.
[0132] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, servers, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.
[0133] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0134] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.
[0135] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A method for evaluating abnormal noises in the interior of a vehicle, characterized in that, Includes the following steps: Based on a preset vehicle application, an excitation signal corresponding to the target excitation mode is sent to the vehicle ECU, so that the vehicle ECU can drive the vehicle horn corresponding to the target excitation mode to generate vibration excitation, thereby exciting the interior components inside the vehicle to vibrate. The vehicle horn includes the main instrument panel horn, the door panel horn, and the rear partition panel horn. During the vibration of interior components, in-vehicle noise signals are acquired based on vehicle microphones, including driver microphone, passenger microphone and rear microphone; The vehicle's in-vehicle noise signal is analyzed by a spectral analysis using an in-vehicle application to determine whether any abnormal noises occur inside the vehicle. If so, determine the target excitation frequency that caused the abnormal noise and its corresponding target vehicle horn based on the time of the abnormal noise occurrence and the target excitation mode; The total sound pressure level above a preset frequency corresponding to each target vehicle microphone is calculated based on the spectrum analysis results. The target vehicle microphone is a vehicle microphone that contains noise signals above a preset frequency in the in-vehicle noise signal. The target interior component causing the abnormal noise is determined based on the total sound pressure level above the preset frequency corresponding to the target vehicle microphone and the location of the target vehicle speaker. The target interior trim parts, target excitation frequency, target vehicle horn, target vehicle microphone, and the time of occurrence of the abnormal noise are used as the evaluation results of interior noise corresponding to the target excitation mode.
2. The method for evaluating abnormal noises in the interior of a vehicle as described in claim 1, characterized in that, Before the step of sending an excitation signal corresponding to the target excitation mode to the vehicle ECU based on a preset vehicle application, the method further includes: Multiple target incentive patterns are constructed based on a combination of incentive frequency patterns and incentive location patterns; Multiple target incentive modes are stored in the vehicle application so that the vehicle application can generate incentive signals corresponding to the target incentive modes.
3. The method for evaluating abnormal noises in the interior of a vehicle as described in claim 2, characterized in that: The excitation frequency modes include white noise excitation, pink noise excitation, frequency sweep excitation, single frequency excitation, and constant bandwidth excitation, and the excitation position modes include full excitation, single excitation, corner excitation, diagonal excitation, and edge excitation.
4. The method for evaluating abnormal noises in the interior of a vehicle as described in claim 1, characterized in that, The process of determining the target interior component causing the abnormal noise based on the total sound pressure level above a preset frequency corresponding to the target vehicle microphone and the location of the target vehicle speaker includes: The target vehicle microphones are sorted in descending order of the total sound pressure level above a preset frequency. The target interior component causing the abnormal noise is determined based on the location of the first N target vehicle microphones and target vehicle speakers, where N is a positive integer.
5. A vehicle interior noise evaluation system, characterized in that, include: In-vehicle applications, vehicle ECU, in-vehicle speakers, and in-vehicle microphones; The vehicle application sends an excitation signal corresponding to the target excitation mode to the vehicle ECU, so that the vehicle ECU can drive the vehicle horn corresponding to the target excitation mode to generate vibration excitation based on the excitation signal, so as to excite the interior parts of the vehicle to vibrate. The vehicle horn includes the main instrument panel horn, the door panel horn and the rear partition panel horn. During the vibration of interior components, in-vehicle noise signals are acquired based on vehicle microphones, including driver microphone, passenger microphone and rear microphone; The vehicle application performs spectrum analysis on the in-vehicle noise signal to determine whether any abnormal noise occurs in the vehicle. If so, the target excitation frequency that caused the abnormal noise and its corresponding target vehicle speaker are determined based on the time of occurrence of the abnormal noise and the target excitation mode. The total sound pressure level above the preset frequency corresponding to each target vehicle microphone is calculated based on the spectrum analysis results. The target vehicle microphone is the vehicle microphone in the in-vehicle noise signal that contains noise signals above the preset frequency. The target interior component causing the abnormal noise is determined based on the total sound pressure level above the preset frequency corresponding to the target vehicle microphone and the location of the target vehicle speaker; the target interior component, target excitation frequency, target vehicle speaker, target vehicle microphone, and the time of occurrence of the abnormal noise are used as the interior abnormal noise evaluation results corresponding to the target excitation mode.
6. A vehicle interior noise evaluation device, characterized in that, include: A memory and a processor, wherein the memory stores at least one instruction, which is loaded and executed by the processor to implement the whole vehicle interior noise evaluation method according to any one of claims 1 to 4.
7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program that, when executed by a processor, implements the whole vehicle interior noise evaluation method according to any one of claims 1 to 4.