Vehicle noise cancellation method, apparatus and system, and device, medium and vehicle

Abstract

Provided in the present application are a vehicle noise cancellation method, apparatus and system, and a device, a medium and a vehicle. The method comprises: on the basis of a travelling speed of a vehicle, determining a target vibration signal corresponding to the travelling speed, wherein the target vibration signal is suitable for implementing sound production of a loudspeaker, so as to perform noise cancellation. In the present application, on the basis of the current travelling speed of a vehicle, a target vibration signal corresponding to the travelling speed can be determined, such that at different travelling speeds of the vehicle, a vehicle noise cancellation control system can perform noise cancellation on the basis of corresponding target vibration signals, thereby improving the accuracy of vehicle noise cancellation.

Description

Vehicle noise reduction method, device, system, equipment, medium and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 29, 2024, with application number 202410234954.2 and application name “Vehicle Noise Reduction Method, Device, System, Equipment, Medium and Vehicle”, the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0002] The present application relates to, but is not limited to, the field of automotive technology, and in particular to a vehicle noise reduction method, device, system, electronic device, computer-readable storage medium, and vehicle. Background Art

[0003] Vehicles generate noise while driving, causing disturbances to passengers. Vehicles are equipped with a Road Noise Cancellation (RNC) system to reduce low-frequency road noise inside the vehicle. This system requires calculations based on vibration signals and controls the speakers to produce sound based on the calculation results to cancel out the noise inside the vehicle. Currently, the RNC system performs noise reduction based on pre-selected vibration signals throughout the vehicle's driving process. However, current solutions, when using these selected vibration signals for noise reduction, lack accuracy. Technical Solutions

[0004] Embodiments of the present application provide a vehicle noise reduction method, system, electronic device, readable storage medium, and vehicle to solve the problem of insufficient noise reduction accuracy in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a vehicle noise reduction method, comprising:

[0006] determining, based on a driving speed of the vehicle, a target vibration signal corresponding to the driving speed;

[0007] The target vibration signal is suitable for enabling a speaker to emit sound to perform noise reduction.

[0008] Optionally, the step of determining a target vibration signal corresponding to the driving speed based on the driving speed of the vehicle includes:

[0009] determining, based on a driving speed of the vehicle, a plurality of vibration signals and a plurality of sound signals corresponding to the driving speed;

[0010] Based on a coherence result between the plurality of sound signals and the plurality of vibration signals, a target vibration signal corresponding to the driving speed is selected from the plurality of vibration signals; the coherence result indicates a correlation between the vibration signal and the sound signal.

[0011] Optionally, the step of selecting a target vibration signal from the multiple vibration signals based on the coherence results between the multiple sound signals and the multiple vibration signals includes:

[0012] Based on a plurality of coherence results between the plurality of sound signals and the plurality of vibration signals, selecting a preset number of coherence results from the plurality of coherence results;

[0013] Among the multiple vibration signals, vibration signals corresponding to the preset number of coherence results are selected as the target vibration signals.

[0014] Optionally, the step of selecting a preset number of coherence results from the multiple coherence results between the multiple sound signals and the multiple vibration signals includes:

[0015] According to the sizes of the multiple coherence results, the multiple coherence results are sorted in a preset order to obtain a coherence result sequence;

[0016] The preset number of coherence results are selected based on the coherence result sequence.

[0017] Optionally, before the step of selecting a target vibration signal from the multiple vibration signals based on the coherence results between the multiple sound signals and the multiple vibration signals, the method further includes:

[0018] Obtaining a set of coherence results corresponding to the vibration signal based on an autopower spectrum of the vibration signal, autopower spectra corresponding to the multiple sound signals, and a cross-power spectrum between the vibration signal and each of the sound signals;

[0019] A corresponding plurality of groups of coherence results are obtained according to the plurality of vibration signals.

[0020] Optionally, the step of determining a target vibration signal corresponding to the driving speed based on the driving speed of the vehicle includes:

[0021] Based on the driving speed of the vehicle and a preset relationship, a target vibration signal corresponding to the driving speed is determined; the preset relationship is a corresponding relationship between the driving speed and the vibration signal.

[0022] Optionally, determining the target vibration signal corresponding to the driving speed based on the driving speed of the vehicle and a preset relationship further includes:

[0023] determining, based on the driving speed of the vehicle, a preset relationship corresponding to a speed interval in which the driving speed of the vehicle is located;

[0024] The target vibration signal is determined based on the driving speed of the vehicle and the preset relationship.

[0025] Optionally, the step of determining a target vibration signal corresponding to the driving speed based on the driving speed of the vehicle includes:

[0026] determining, based on the driving speed of the vehicle, the target vibration sensor corresponding to the driving speed;

[0027] The vibration signal output by the target vibration sensor is used as the target vibration signal.

[0028] Optionally, the step of determining the target vibration sensor corresponding to the driving speed based on the driving speed of the vehicle includes:

[0029] determining the speed interval based on the driving speed of the vehicle;

[0030] determining the target vibration sensor based on the speed interval;

[0031] Optionally, after the step of determining a target vibration signal corresponding to the driving speed based on the driving speed of the vehicle, the method further includes:

[0032] A noise reduction control signal is determined based on the target vibration signal, where the noise reduction control signal is used to control the speaker to emit sound to perform noise reduction.

[0033] Optionally, after the step of determining the noise reduction control signal based on the target vibration signal, the method further includes:

[0034] determining noise within the vehicle;

[0035] When the noise in the vehicle is greater than a preset sound threshold, the number of the target vibration signal is increased until the noise in the vehicle is less than or equal to the preset sound threshold.

[0036] In a second aspect, an embodiment of the present application provides a vehicle noise reduction device, which is used to determine a target vibration signal corresponding to the vehicle's driving speed based on the vehicle's driving speed; the target vibration signal is suitable for enabling a speaker to emit sound for noise reduction.

[0037] Optionally, the vehicle noise reduction device is configured to determine, based on the vehicle's driving speed, a target vibration signal corresponding to the driving speed;

[0038] The target vibration signal is suitable for enabling a speaker to emit sound to perform noise reduction.

[0039] Optionally, the vehicle noise reduction device is configured to determine, based on a driving speed of the vehicle, a plurality of vibration signals and a plurality of sound signals corresponding to the driving speed;

[0040] Based on a coherence result between the plurality of sound signals and the plurality of vibration signals, a target vibration signal corresponding to the driving speed is selected from the plurality of vibration signals; the coherence result indicates a correlation between the vibration signal and the sound signal.

[0041] Optionally, the vehicle noise reduction device is configured to select a preset number of coherence results from a plurality of coherence results between the plurality of sound signals and the plurality of vibration signals;

[0042] Among the multiple vibration signals, vibration signals corresponding to the preset number of coherence results are selected as the target vibration signals.

[0043] Optionally, the vehicle noise reduction device is configured to sort the multiple coherence results in a preset order according to the magnitudes of the multiple coherence results to obtain a coherence result sequence;

[0044] The preset number of coherence results are selected based on the coherence result sequence.

[0045] Optionally, the vehicle noise reduction device is configured to obtain a set of coherence results corresponding to the vibration signal based on an autopower spectrum of the vibration signal, autopower spectra corresponding to the multiple sound signals, and a cross power spectrum between the vibration signal and each of the sound signals;

[0046] A corresponding plurality of groups of coherence results are obtained according to the plurality of vibration signals.

[0047] Optionally, the vehicle noise reduction device is used to determine a target vibration signal corresponding to the driving speed based on the driving speed of the vehicle and a preset relationship; the preset relationship is the corresponding relationship between the driving speed and the vibration signal.

[0048] Optionally, the vehicle noise reduction device is configured to determine, based on the driving speed of the vehicle, a preset relationship corresponding to a speed interval in which the driving speed of the vehicle is located;

[0049] The target vibration signal is determined based on the driving speed of the vehicle and the preset relationship.

[0050] Optionally, the vehicle noise reduction device is configured to determine, based on the driving speed of the vehicle, the target vibration sensor corresponding to the driving speed;

[0051] The vibration signal output by the target vibration sensor is used as the target vibration signal.

[0052] Optionally, the vehicle noise reduction device is configured to determine the speed range based on the driving speed of the vehicle;

[0053] determining the target vibration sensor based on the speed interval;

[0054] Optionally, the vehicle noise reduction device is used to determine a noise reduction control signal based on the target vibration signal, and the noise reduction control signal is used to control the speaker to make sound to perform noise reduction.

[0055] Optionally, the vehicle noise reduction device is used to determine the noise inside the vehicle;

[0056] When the noise in the vehicle is greater than a preset sound threshold, the number of the target vibration signal is increased until the noise in the vehicle is less than or equal to the preset sound threshold.

[0057] In a third aspect, an embodiment of the present application provides a vehicle noise reduction system, the system comprising:

[0058] The vehicle noise reduction device and speaker according to the second aspect;

[0059] The vehicle noise reduction device obtains a noise reduction control signal based on the target vibration signal, and sends the noise reduction control signal to the speaker;

[0060] The speaker receives the noise reduction control signal to perform noise reduction.

[0061] In a fourth aspect, an embodiment of the present application provides an electronic device, including: a processor and a memory;

[0062] Memory, used to store computer instructions;

[0063] The processor is configured to implement the steps of the vehicle noise reduction method described in the first aspect when executing instructions stored in the memory.

[0064] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the steps of the vehicle noise reduction method described in the first aspect above.

[0065] In a sixth aspect, an embodiment of the present application provides a vehicle, such as the vehicle noise reduction device described in the second aspect, and / or the vehicle noise reduction system described in the third aspect, and / or the electronic device described in the fourth aspect.

[0066] Compared with the prior art, this application has the following advantages:

[0067] In an embodiment of the present application, a target vibration signal corresponding to the vehicle's speed is determined based on the vehicle's speed, enabling the speaker to be controlled to produce sound based on the target vibration signal for noise reduction. This application determines the target vibration signal corresponding to the vehicle's current speed, enabling noise reduction based on the corresponding target vibration signal at different vehicle speeds, thereby improving the accuracy of vehicle noise reduction.

[0068] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments.

[0070] FIG1 is a schematic diagram of the steps of a vehicle noise reduction method provided by an embodiment of the present application;

[0071] FIG2 is a schematic diagram of the steps of another vehicle noise reduction method provided by an embodiment of the present application;

[0072] FIG3 is a schematic diagram of a noise frequency band provided in an embodiment of the present application;

[0073] FIG4 is a schematic diagram of an interface for setting up a sensor according to an embodiment of the present application;

[0074] FIG5 is a schematic diagram of a process for obtaining a vibration signal in a speed range according to an embodiment of the present application;

[0075] FIG6 is a schematic diagram of determining a target vibration signal according to a current speed according to an embodiment of the present application;

[0076] FIG7 is a schematic diagram of a structure for noise reduction and adjustment according to the current speed provided by an embodiment of the present application;

[0077] FIG8 is a schematic structural diagram of a vehicle noise reduction system provided in an embodiment of the present application;

[0078] FIG9 is a block diagram of an electronic device provided in an embodiment of the present application.

[0079] Implementation Methods of the Application

[0080] The following describes exemplary embodiments of the present application in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0081] FIG1 is a diagram showing the steps of a vehicle noise reduction method provided by an embodiment of the present application, including:

[0082] Step 101, based on the driving speed of the vehicle, determining a target vibration signal corresponding to the driving speed;

[0083] In the disclosed embodiment, the current speed of the vehicle can be obtained by using a speed sensor of the vehicle during driving. It is understood that the speed of the vehicle can change at any time during driving. For example, the speed of the vehicle can increase from 30 kilometers per hour to 50 kilometers per hour.

[0084] The vibration signal can be considered to represent the vibration conditions of the vehicle, which can also cause noise. The target vibration signal corresponding to the vehicle's driving speed indicates that the target vibration signal is highly correlated with the noise generated by the vehicle at the current driving speed. The target vibration signal can be a target vibration signal group consisting of multiple vibration signals.

[0085] In an embodiment of the present disclosure, a vehicle noise reduction control system can perform noise reduction calculations based on vibration signals and, based on the calculation results, control the speakers to reduce noise within the vehicle. The vehicle noise reduction control system performs calculations based on a predetermined noise reduction algorithm according to the target vibration signal and uses the calculation results to control the speakers to reduce noise within the vehicle.

[0086] In summary, in the embodiments of the present application, a target vibration signal corresponding to the vehicle's speed is determined based on the vehicle's speed, enabling the speaker to be controlled to produce sound based on the target vibration signal for noise reduction. This application determines the target vibration signal corresponding to the vehicle's current speed, enabling noise reduction based on the corresponding target vibration signal at different vehicle speeds, thereby improving the accuracy of vehicle noise reduction.

[0087] The following is a specific implementation process to illustrate the process of the vehicle noise reduction method according to the embodiment of the present application. Figure 2 is a step diagram of another vehicle noise reduction method provided by the embodiment of the present disclosure; as shown in Figure 2, it includes:

[0088] Step 201, based on the driving speed of the vehicle, determining a target vibration signal corresponding to the driving speed;

[0089] For the above step 201 , reference may be made to the content of the embodiment of FIG1 , which will not be described in detail here.

[0090] Optionally, step 201 may include sub-steps 2011 and 2014:

[0091] Sub-step 2011, based on the driving speed of the vehicle, determining a plurality of vibration signals and a plurality of sound signals corresponding to the driving speed;

[0092] Sub-step 2014: selecting a target vibration signal corresponding to the driving speed from the multiple vibration signals based on a coherence result between the multiple sound signals and the multiple vibration signals; the coherence result indicates the correlation between the vibration signal and the sound signal.

[0093] In the disclosed embodiments, the vehicle's sound sensor can capture in-vehicle noise, such as road noise, to obtain the noise power spectrum and identify the primary frequency band of the road noise. Currently, the primary acoustic energy of the noise is concentrated below 500 Hz. Figure 3 shows a frequency band diagram of road noise. As shown in Figure 3, the noise is higher within the 0-500 Hz horizontal axis. This frequency band can be labeled as the primary road noise band. Within this primary road noise band, vibration and sound signals are acquired and coherence is calculated.

[0094] At the current vehicle speed, multiple vibration signals and sound signals corresponding to the vehicle speed are determined using the vehicle's multiple acceleration sensors and multiple sound sensors. The acceleration sensors can be located on both sides of the suspension, with the wheel core as the axis of symmetry, and on a crossbeam connected to the vehicle body. It is understood that one acceleration sensor can capture three vibration signals: acceleration in the vehicle's fore-aft direction, acceleration in the vehicle's left-right direction, and acceleration in the vehicle's up-down direction. In other words, one acceleration sensor can actually capture three vibration signals.

[0095] As shown in Figure 4 , acceleration sensors 401, 402, and 403 are positioned near the vehicle's axles, with three sensors positioned near each axle. Sound sensors 404 can be positioned near the vehicle's seat headrests, so that the sound captured by sound sensors 404 approximates the sound captured by the human ear. Sound sensors can be positioned on each of the four seats shown in the figure. Speakers 405, 406, and 407 can be positioned around the vehicle's seats, for a total of six speakers as shown in Figure 4 .

[0096] A target vibration signal is selected from the plurality of vibration signals based on coherence results between the plurality of sound signals and the plurality of vibration signals. The coherence results may be calculated using a preset coherence calculation formula, and each coherence result may represent a correlation between a vibration signal and a sound signal.

[0097] Optionally, sub-step 2014 includes steps 20141-20142:

[0098] Step 20141: Based on a plurality of coherence results between the plurality of sound signals and the plurality of vibration signals, select a preset number of coherence results from the plurality of coherence results;

[0099] Step 20142: Select vibration signals corresponding to the preset number of coherence results from the multiple vibration signals as target vibration signals.

[0100] In the disclosed embodiment, a preset number of coherence results are selected from the multiple coherence results based on multiple coherence results between multiple sound signals and multiple vibration signals. The preset number may be a value such as 3 or 5. Since each coherence result represents the coherence between a vibration signal and a sound signal, after determining the preset number of coherence results, the vibration signals corresponding to these coherence results are determined based on the preset number of coherence results, and the vibration signals corresponding to these coherence results are used as target vibration signals.

[0101] Optionally, step 20141 may include steps 201411-201412:

[0102] Step 201411: sorting the multiple coherence results in a preset order according to the sizes of the multiple coherence results to obtain a coherence result sequence;

[0103] Step 201412: Select a preset number of coherence results based on the coherence result sequence.

[0104] In an embodiment of the present disclosure, the multiple coherence results can be sorted in a preset order based on their sizes, for example, from largest to smallest, to obtain a coherence result sequence. Then, a preset number of coherence results at the front of the coherence result sequence are selected. It is understood that the multiple coherence results can also be sorted in a preset order based on their sizes, from smallest to largest, to obtain a coherence result sequence. Then, a preset number of coherence results at the back of the coherence result sequence are selected.

[0105] Optionally, before sub-step 2014, sub-steps 2012-2013 are also included:

[0106] Sub-step 2012: obtaining a set of coherence results corresponding to the vibration signal based on the autopower spectrum of the vibration signal, the autopower spectra corresponding to the multiple sound signals, and the cross power spectrum between the vibration signal and each of the sound signals;

[0107] Sub-step 2013: obtaining corresponding multiple groups of coherence results based on the multiple vibration signals.

[0108] In an embodiment of the present disclosure, based on multiple vibration signals and multiple sound signals, the process of calculating and obtaining multiple coherence results can be that each vibration signal among the multiple vibration signals is respectively calculated for coherence with each sound signal among the multiple sound signals, so as to obtain a set of coherence results corresponding to one vibration signal. A coherence result of the vibration signal can be calculated by using the autopower spectrum of the vibration signal, the autopower spectrum of a sound signal, and the cross-power spectrum of the vibration signal and the sound signal. It is understandable that the number of coherence results contained in a set of coherence results corresponding to one vibration signal is consistent with the number of sound signals.

[0109] For example, multiple vibration signals include vibration signal A, vibration signal B, and vibration signal C, and multiple sound signals include sound signal D, sound signal E, and sound signal F. Then, the vibration signal A and sound signal D, sound signal E, and sound signal F are coherently calculated to obtain three coherence calculation results, which is a set of coherence results corresponding to vibration signal A; the vibration signal B and sound signal D, sound signal E, and sound signal F are coherently calculated to obtain three coherence calculation results; the vibration signal C and sound signal D, sound signal E, and sound signal F are coherently calculated to obtain three coherence calculation results, and a total of nine coherence results are obtained. The coherence results can be calculated using the following formula:

[0110] in, Indicates the coherence results between the vibration signal and the sound signal; It corresponds to the cross power spectrum between the vibration signal obtained by the acceleration sensor and the sound signal obtained by the sound sensor. is the autopower spectrum of the vibration signal, is the autopower spectrum of the sound signal.

[0111] Among them, the power spectrum represents the relationship between the frequency and energy of each harmonic component in the signal, and can be used to analyze the frequency components and structural relationship of the signal, as well as the energy of each frequency component; the cross power spectrum, also called the mutual power spectrum, can represent the correlation between two signals in time and frequency, and can be obtained by Fourier transforming the two signals, multiplying the frequency domain representations and taking the average.

[0112] Optionally, step 201 may include sub-step 2015:

[0113] Sub-step 2015 , based on the vehicle's driving speed and a preset relationship, determining a target vibration signal corresponding to the driving speed; the preset relationship is the corresponding relationship between the driving speed and the vibration signal.

[0114] In the embodiment of the present disclosure, a preset relationship may be pre-stored, which represents the corresponding relationship between the driving speed and the vibration signal. According to the driving speed and the preset relationship, a target vibration signal corresponding to the driving speed is determined.

[0115] The preset relationship can be stored in a configuration file, such as in a data table. Furthermore, the vibration signal corresponding to the driving speed in the preset relationship can be obtained from pre-factory vehicle testing or from actual user driving of the vehicle. However, it should be understood that both pre-factory testing and actual user driving of the vehicle represent the vehicle's driving process, and therefore are essentially indistinguishable.

[0116] During the vehicle's travel, obtaining a target vibration signal corresponding to each travel speed can be similar to the steps 2011, 2012, 2013, 201411, 201412, and 20142 described above, and will not be repeated here. When the vehicle travels at a certain speed, the vibration signal and sound signal corresponding to that speed are obtained, and based on the coherence result, a predetermined number of target vibration signals are selected. The speed and the target vibration signals obtained at that speed can then be stored to form a file or configuration that stores the corresponding relationship between the travel speed and the vibration signal.

[0117] Optionally, step 2015 may further include: determining, based on the driving speed of the vehicle, a preset relationship corresponding to the speed interval in which the driving speed of the vehicle is located;

[0118] The target vibration signal is determined based on the driving speed of the vehicle and the preset relationship.

[0119] The vehicle's speed range can be divided into multiple speed intervals based on the preset speed interval size; the vibration signal corresponding to each speed interval is obtained, and then, among the vibration signals corresponding to each speed interval, the target vibration signal corresponding to each speed interval is selected based on the coherence result of the vibration signal and the sound signal.

[0120] The preset speed interval size can be 10 or 20, etc. The speed interval refers to the difference between the minimum speed and the maximum speed within this interval. For example, the speed interval can be 10, the minimum speed of this speed interval can be 30 kilometers per hour, and the maximum speed of this speed interval can be 40 kilometers per hour. The difference between the minimum speed and the maximum speed is the size of this interval. The speed range of the vehicle can be a range set for vehicle noise reduction. For example, when the vehicle travels in the speed range of 30 to 90 kilometers per hour, the noise is most obvious. The speed range of 30 to 90 kilometers per hour can be used as the range divided by the speed interval. The data stored in the acceleration data table can only store the vibration signal data corresponding to the speed range of 30 to 90 kilometers per hour.

[0121] The speed range of the vehicle can be divided into multiple intervals according to the preset speed interval size. For example, the speed interval size can be 10, and the speed range of the vehicle can be 60 to 90 kilometers per hour. The speed intervals obtained can be 60 to 70 kilometers per hour, 70 to 80 kilometers per hour, and 80 to 90 kilometers per hour. Then the vibration signals corresponding to these three intervals are obtained.

[0122] At different speeds in the speed range, multiple vibration signals are obtained respectively through multiple acceleration sensors of the vehicle, and multiple sound signals are obtained respectively through multiple sound sensors. At different speeds in the speed range, it means controlling the vehicle to travel at different speeds in the speed range. For example, the speed range can be 60 to 70 kilometers per hour, then the different speeds in this speed range refer to 60 kilometers per hour, 61 kilometers per hour, 62 kilometers per hour...70 kilometers per hour, or 60 kilometers per hour, 62 kilometers per hour, 64 kilometers per hour...70 kilometers per hour, that is, the difference or increment between adjacent different speeds can be 1 or 2, etc., and there is no limitation here.

[0123] By driving at different speeds within a speed range, vibration signals and sound signals at different speeds can be obtained. By summarizing the vibration signals and sound signals at different speeds, all vibration signals and sound signals corresponding to a speed range can be obtained. Then, based on all vibration signals and all sound signals, a coherence result is obtained. Similarly, based on the size of the coherence, a certain number of correlation results can be selected from multiple coherence results, and the corresponding target vibration signals can be determined. These target vibration signals correspond to the entire speed range, not to a single driving speed. That is, although the driving speeds of the vehicles are different, when they all fall within a speed range, the target vibration signals corresponding to different driving speeds are consistent. Each speed range is stored in correspondence with the corresponding vibration signal to obtain a preset relationship between the speed range and the vibration signal.

[0124] The following formula can be used to express the multiple coherence results corresponding to the speed interval:

[0125] Among them, C J are multiple coherence results corresponding to the speed interval, N is the number of sound sensors, j is the number of vibration signals, k is the number of sound signals, j is the number of vibration signals, and i represents the increasing speed (if the speed interval is 10, i is 1, which means adding 1 to the minimum speed of this speed interval).

[0126] A preset number of coherence results are selected from the multiple coherence results. The preset number can be 2, 3, or other numbers. When selecting the preset number, the multiple coherence results corresponding to different speeds in the speed range are sorted by size, and the preset number of coherence results with higher rankings, i.e., higher coherence, are selected. Based on the preset number of coherence results, vibration signals used to calculate these coherence results are determined. The number of vibration signals is also a preset number, and the preset number of vibration signals is used as a set of vibration signals for the speed range currently being tested.

[0127] By dividing the vehicle's speed range into multiple intervals, each interval includes several different speeds. As long as the vehicle's current speed falls within the corresponding interval, the noise generated by the vehicle traveling at the current speed can be reduced based on the vibration signal of this interval. This reduces the data storage capacity of the acceleration data table, shortens the determination time when determining the corresponding vibration signal based on the vehicle's current speed, and improves the noise reduction efficiency.

[0128] As shown in Figure 5, Figure 5 shows that the speed interval size is set to 10, the difference or increment between adjacent different speeds is 1, the speed range is 30-90 kilometers per hour, and then the vibration signals of multiple speed intervals within this speed range are obtained. Step S1, start; Step S2, set the initial speed V to 30, the speed increment i to 0, indicating driving at the initial speed, and the vibration signal N to 1, indicating the start of obtaining the vibration signal of the first speed interval; Step S3, the increment changes from 0 to 1, indicating adding an increment of 1 to the initial speed V, and the speed becomes 31 kilometers per hour; Step S4, obtain the vibration signal at the current speed; Step S5, obtain the sound signal at the current speed; Step S6, calculate the coherence of the vibration signal and the sound signal; Step S7, sort the multiple coherence results; Step S8, determine whether Exceeds the interval size; Step S9, if all speeds in the current speed interval have been traversed, all coherence results corresponding to all different speeds are obtained, otherwise continue to add an increment of 2 to the initial speed, and continue to obtain signals when the speed is 32; Step S10, sort all coherence results in the speed interval, and then obtain the target vibration signal corresponding to the speed interval from the sorting; Step S11, determine whether the speed is greater than the upper limit of the speed range 90; Step S12, if it is greater than 90, end; Step S12, if it is not greater than 90, enter the next speed interval and repeat the above steps.

[0129] For multiple speed intervals obtained by dividing the vehicle's speed range, coherence results are calculated for different speeds in these intervals, and a preset number of target vibration signals, namely a target vibration signal group, are selected for each speed interval.

[0130] As shown in FIG6 , the current speed of the vehicle is determined from the vehicle speed sensor 601, and the corresponding vibration signal group, i.e., the target vibration signal, is determined according to the current speed of the vehicle. The vibration signal group can be first input into the vehicle noise reduction system main controller 602, and the vehicle noise reduction system main controller 602 updates the parameters, and then inputs them into the vehicle noise reduction system 603.

[0131] Optionally, step 201 may include sub-steps 2016-2017:

[0132] Sub-step 2016, based on the driving speed of the vehicle, determining a target vibration sensor corresponding to the driving speed;

[0133] Sub-step 2017: using the vibration signal output by the target vibration sensor as the target vibration signal.

[0134] In the disclosed embodiment, a target vibration sensor can be determined based on the vehicle's speed. The vibration signal output by the target vibration sensor is then used as the target vibration signal. It is understood that there can be multiple target vibration sensors, forming a target vibration sensor group.

[0135] The process of determining the target vibration sensor corresponding to the driving speed can be to collect vibration signals and sound signals at the driving speed, and then select the vibration signal with better coherence from the collected vibration signals based on the coherence results of the vibration signals and sound signals. This process can refer to the above-mentioned step embodiment and will not be repeated here. After determining the vibration signals with better coherence, the vibration sensors corresponding to these vibration signals with better coherence are determined, that is, the source of these vibration signals with better coherence. The vibration sensor that generates the vibration signal with better coherence is used as the target vibration sensor, and then the vibration signal output by the target vibration sensor is used as the target vibration signal.

[0136] It can also be similar to the preset relationship between the driving speed and the vibration signal mentioned above. Through pre-factory testing or the user's actual driving of the vehicle, the target sensor at each driving speed is determined through the above process, and the corresponding relationship between each driving speed and the corresponding target vibration sensor is stored. The target vibration sensor can be determined directly based on the driving speed and the corresponding relationship.

[0137] In implementing the embodiments of the present disclosure, a target vibration sensor corresponding to the vehicle's speed is determined based on the vehicle's speed; the vibration signal output by the target vibration sensor is used as the target vibration signal. Different target vibration sensors can be determined based on different speeds to obtain a vibration signal from a target vibration sensor with good vehicle noise coherence at the current speed. This improves the accuracy of noise reduction at different speeds and, in turn, enhances the stability of the noise reduction effect.

[0138] Optionally, step 2016 may include: determining the speed interval based on the driving speed of the vehicle;

[0139] The target vibration sensor is determined based on the speed interval.

[0140] In the embodiment of the present disclosure, the speed interval can be determined according to the driving speed of the vehicle with reference to the content about the speed interval in the above step 2015. A preset correspondence between the speed interval and the target vibration sensor can be established in advance. The process of determining the corresponding target vibration sensor for each driving speed in the above steps 2016 and 2017 can be referred to, and the target vibration sensors corresponding to each driving speed in a speed interval can be aggregated and summarized, and then the target vibration sensors with the highest number of occurrences can be selected as the target vibration sensors corresponding to the speed interval. For example, in the speed interval of 30 kilometers per hour to 40 kilometers per hour, vibration sensor A is the target vibration sensor corresponding to 7 speeds in the speed interval, and vibration sensor B is the target vibration sensor corresponding to 3 speeds in the speed interval, then vibration sensor A can be used as the target vibration sensor for the speed interval. There can be multiple target vibration sensors corresponding to a speed interval.

[0141] Based on the preset correspondence between the established speed intervals and the target vibration sensors, the speed intervals may be determined based on the driving speed of the vehicle, and the target vibration sensors may be determined based on the speed intervals.

[0142] Optionally, step 201 may further include step 202:

[0143] Step 202: Determine a noise reduction control signal based on the target vibration signal, where the noise reduction control signal is used to control the speaker to emit sound to perform noise reduction.

[0144] In the embodiment of the present disclosure, the vehicle noise reduction control system can perform calculations based on a predetermined noise reduction algorithm according to the target vibration signal, and control the sound of the speaker to reduce the noise in the vehicle through the calculation results.

[0145] Optionally, after step 202, steps 203-204 may also be included:

[0146] Step 203, determining the noise inside the vehicle;

[0147] Step 204 : When the noise in the vehicle is greater than a preset sound threshold, increase the number of the target vibration signal until the noise in the vehicle is less than or equal to the preset sound threshold.

[0148] In an embodiment of the present disclosure, after determining a target vibration signal and inputting it into a vehicle noise reduction control system for noise reduction, the vehicle's interior noise can be detected via a sound sensor. A preset sound threshold is also pre-set. If the noise level in the vehicle remains above the preset sound threshold after noise reduction, the noise reduction effect is considered insufficient. Because the target vibration signals selected before noise reduction are a preset number of vibration signals, if the noise level in the vehicle exceeds the preset sound threshold, the number of target vibration signals is increased. For example, if the target vibration signals are selected based on the coherence results, the first noise reduction step selects the top five coherence results in the sort, i.e., obtains five target vibration signals. Then, the second noise reduction step may select the top ten coherence results in the sort, i.e., obtain ten target vibration signals, and perform noise reduction based on these ten target vibration signals. The system then continues to detect whether the vehicle noise level is above the preset sound threshold. If the noise level is above the preset sound threshold, additional target vibration signals are selected in a similar manner until the noise level in the vehicle is equal to or less than the preset sound threshold.

[0149] As shown in Figure 7, the noise source 701 emits noise, the vehicle's speed sensor 702 obtains the vehicle speed, and the vehicle noise reduction control system 703 obtains the corresponding target vibration signal according to the current speed of the vehicle, performs noise reduction calculations to control the speaker 704 to make sound, and the sound of the speaker 704 is mixed with the noise to achieve a noise reduction effect. The sound sensor 705 continues to obtain the remaining noise and continues to adjust the target vibration signal through the vehicle noise reduction control system 703 to further reduce the noise.

[0150] In the embodiments of the present disclosure, after the vehicle noise reduction control system controls the speaker to emit sound to reduce vehicle noise, the vehicle's sound sensor is used to detect the noise inside the vehicle. If the noise inside the vehicle exceeds a preset sound threshold, the preset number of vibration signals is increased to obtain more vibration signals until the noise inside the vehicle is equal to or less than the preset sound threshold. This allows for the acquisition of more vibration signals based on the actual noise reduction situation, improving the noise reduction effect even when it is insufficient, thereby enhancing the noise reduction effect.

[0151] In summary, in the embodiments of the present application, a target vibration signal corresponding to the vehicle's speed is determined based on the vehicle's speed, enabling the speaker to be controlled to produce sound based on the target vibration signal for noise reduction. This application determines the target vibration signal corresponding to the vehicle's current speed, enabling noise reduction based on the corresponding target vibration signal at different vehicle speeds, thereby improving the accuracy of vehicle noise reduction.

[0152] An embodiment of the present application provides a vehicle noise reduction device, which is used to determine a target vibration signal corresponding to the vehicle's driving speed based on the vehicle's driving speed; the target vibration signal is suitable for enabling a speaker to emit sound for noise reduction.

[0153] Optionally, the vehicle noise reduction device is configured to determine, based on the vehicle's driving speed, a target vibration signal corresponding to the driving speed;

[0154] The target vibration signal is suitable for enabling a speaker to emit sound to perform noise reduction.

[0155] Optionally, the vehicle noise reduction device is configured to determine, based on a driving speed of the vehicle, a plurality of vibration signals and a plurality of sound signals corresponding to the driving speed;

[0156] Based on a coherence result between the plurality of sound signals and the plurality of vibration signals, a target vibration signal corresponding to the driving speed is selected from the plurality of vibration signals; the coherence result indicates a correlation between the vibration signal and the sound signal.

[0157] Optionally, the vehicle noise reduction device is configured to select a preset number of coherence results from a plurality of coherence results between the plurality of sound signals and the plurality of vibration signals;

[0158] Among the multiple vibration signals, vibration signals corresponding to the preset number of coherence results are selected as the target vibration signals.

[0159] Optionally, the vehicle noise reduction device is configured to sort the multiple coherence results in a preset order according to the magnitudes of the multiple coherence results to obtain a coherence result sequence;

[0160] The preset number of coherence results are selected based on the coherence result sequence.

[0161] Optionally, the vehicle noise reduction device is configured to obtain a set of coherence results corresponding to the vibration signal based on an autopower spectrum of the vibration signal, autopower spectra corresponding to the multiple sound signals, and a cross power spectrum between the vibration signal and each of the sound signals;

[0162] A corresponding plurality of groups of coherence results are obtained according to the plurality of vibration signals.

[0163] Optionally, the vehicle noise reduction device is used to determine a target vibration signal corresponding to the driving speed based on the driving speed of the vehicle and a preset relationship; the preset relationship is the corresponding relationship between the driving speed and the vibration signal.

[0164] Optionally, the vehicle noise reduction device is configured to determine, based on the driving speed of the vehicle, a preset relationship corresponding to a speed interval in which the driving speed of the vehicle is located;

[0165] The target vibration signal is determined based on the driving speed of the vehicle and the preset relationship.

[0166] Optionally, the vehicle noise reduction device is configured to determine, based on the driving speed of the vehicle, the target vibration sensor corresponding to the driving speed;

[0167] The vibration signal output by the target vibration sensor is used as the target vibration signal.

[0168] Optionally, the vehicle noise reduction device is configured to determine the speed range based on the driving speed of the vehicle;

[0169] determining the target vibration sensor based on the speed interval;

[0170] Optionally, the vehicle noise reduction device is used to determine a noise reduction control signal based on the target vibration signal, and the noise reduction control signal is used to control the speaker to make sound to perform noise reduction.

[0171] Optionally, the vehicle noise reduction device is used to determine the noise inside the vehicle;

[0172] When the noise in the vehicle is greater than a preset sound threshold, the number of the target vibration signal is increased until the noise in the vehicle is less than or equal to the preset sound threshold.

[0173] Among them, the vehicle noise reduction device can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components.

[0174] In summary, in the embodiments of the present application, a target vibration signal corresponding to the vehicle's speed is determined based on the vehicle's speed, enabling the speaker to be controlled to produce sound based on the target vibration signal for noise reduction. This application determines the target vibration signal corresponding to the vehicle's current speed, enabling noise reduction based on the corresponding target vibration signal at different vehicle speeds, thereby improving the accuracy of vehicle noise reduction.

[0175] FIG8 is a schematic diagram of a vehicle noise reduction system provided by an embodiment of the present application. As shown in FIG8 , the system includes:

[0176] Vehicle noise reduction device 801 and speaker 802;

[0177] The vehicle noise reduction device 801 obtains a noise reduction control signal based on the target vibration signal, and sends the noise reduction control signal to the speaker 802;

[0178] The speaker 802 receives the noise reduction control signal to perform noise reduction.

[0179] An embodiment of the present application also provides an electronic device, as shown in Figure 9, including a processor 901, a communication interface 902, a memory 903 and a communication bus 904, wherein the processor 901, the communication interface 902, and the memory 903 communicate with each other through the communication bus 904.

[0180] The memory 903 is used to store computer instructions.

[0181] When the processor 901 is used to execute the instructions stored in the memory 903, the following steps are implemented: based on the driving speed of the vehicle, determining a target vibration signal corresponding to the driving speed; the target vibration signal is suitable for realizing the sound of the speaker to reduce noise

[0182] The processor 901 may also implement other steps in the above-mentioned vehicle noise reduction method, which will not be described in detail here.

[0183] The communication bus mentioned in the electronic device mentioned above may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. This communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is used in the figure, but this does not mean that there is only one bus or only one type of bus.

[0184] The communication interface is used for communication between the above electronic device and other devices.

[0185] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage. Alternatively, the memory may be at least one storage device located away from the processor.

[0186] The above-mentioned processor can be a general-purpose processor, including a central processing unit, a network processor, etc.; it can also be a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component.

[0187] In another embodiment provided by the present application, a computer-readable storage medium is further provided. The computer-readable storage medium stores instructions, which, when executed on a computer, enable the computer to execute the vehicle noise reduction method described in the above embodiment.

[0188] In another embodiment provided by the present application, a computer program product including instructions is further provided. When the computer program product is run on a computer, the computer is enabled to execute the vehicle noise reduction method described in the above embodiment.

[0189] In yet another embodiment provided by the present application, a vehicle including a vehicle noise reduction device and / or a vehicle noise reduction system, and / or the above-mentioned electronic device is also provided.

[0190] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

[0191] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0192] Each embodiment in this specification is described in a related manner. Similar portions between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments. The embodiments of the apparatus, electronic device, computer-readable storage medium, and computer program product containing instructions thereof are generally similar to the method embodiments, so their description is relatively simple. For related portions, reference can be made to the description of the method embodiments.

[0193] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the scope of protection of the present application.

Claims

1. A vehicle noise reduction method, wherein: The method comprises: determining, based on a driving speed of the vehicle, a target vibration signal corresponding to the driving speed; The target vibration signal is suitable for enabling a speaker to emit sound to perform noise reduction.

2. The method according to claim 1, wherein The step of determining a target vibration signal corresponding to the driving speed of the vehicle based on the driving speed includes: determining, based on a driving speed of the vehicle, a plurality of vibration signals and a plurality of sound signals corresponding to the driving speed; Based on a coherence result between the plurality of sound signals and the plurality of vibration signals, a target vibration signal corresponding to the driving speed is selected from the plurality of vibration signals; the coherence result indicates a correlation between the vibration signal and the sound signal.

3. The method according to claim 2, wherein: The step of selecting a target vibration signal from the plurality of vibration signals based on the coherence results between the plurality of sound signals and the plurality of vibration signals comprises: Based on a plurality of coherence results between the plurality of sound signals and the plurality of vibration signals, selecting a preset number of coherence results from the plurality of coherence results; Among the multiple vibration signals, vibration signals corresponding to the preset number of coherence results are selected as the target vibration signals.

4. The method according to claim 3, wherein: The step of selecting a preset number of coherence results from the plurality of coherence results between the plurality of sound signals and the plurality of vibration signals comprises: According to the sizes of the multiple coherence results, the multiple coherence results are sorted in a preset order to obtain a coherence result sequence; The preset number of coherence results are selected based on the coherence result sequence.

5. The method according to claim 2, wherein: Before the step of selecting a target vibration signal from the plurality of vibration signals based on the coherence results between the plurality of sound signals and the plurality of vibration signals, the method further comprises: Obtaining a set of coherence results corresponding to the vibration signal based on an autopower spectrum of the vibration signal, autopower spectra corresponding to the multiple sound signals, and a cross-power spectrum between the vibration signal and each of the sound signals; A corresponding plurality of groups of coherence results are obtained according to the plurality of vibration signals.

6. The method according to claim 1, wherein The step of determining a target vibration signal corresponding to the driving speed of the vehicle based on the driving speed includes: Based on the driving speed of the vehicle and a preset relationship, a target vibration signal corresponding to the driving speed is determined; the preset relationship is a corresponding relationship between the driving speed and the vibration signal.

7. The method according to claim 6, wherein: The determining of the target vibration signal corresponding to the driving speed based on the driving speed of the vehicle and a preset relationship further includes: determining, based on the driving speed of the vehicle, a preset relationship corresponding to a speed interval in which the driving speed of the vehicle is located; The target vibration signal is determined based on the driving speed of the vehicle and the preset relationship.

8. The method according to claim 1, wherein The step of determining a target vibration signal corresponding to the driving speed of the vehicle based on the driving speed includes: determining, based on a driving speed of the vehicle, a target vibration sensor corresponding to the driving speed; The vibration signal output by the target vibration sensor is used as the target vibration signal.

9. The method according to claim 8, wherein The step of determining a target vibration sensor corresponding to the driving speed of the vehicle based on the driving speed of the vehicle includes: determining the speed interval based on the driving speed of the vehicle; The target vibration sensor is determined based on the speed interval.

10. The method according to claim 1, wherein After the step of determining a target vibration signal corresponding to the driving speed of the vehicle based on the driving speed, the method further includes: A noise reduction control signal is determined based on the target vibration signal, where the noise reduction control signal is used to control the speaker to emit sound to perform noise reduction.

11. The method according to claim 10, wherein: After the step of determining the noise reduction control signal based on the target vibration signal, the method further includes: determining noise within the vehicle; When the noise in the vehicle is greater than a preset sound threshold, the number of the target vibration signal is increased until the noise in the vehicle is less than or equal to the preset sound threshold.

12. A vehicle noise reduction device, wherein: The device comprises: The vehicle noise reduction device is used to determine a target vibration signal corresponding to the vehicle's driving speed based on the vehicle's driving speed; the target vibration signal is suitable for enabling a speaker to emit sound to perform noise reduction.

13. The device according to claim 12, wherein The device is also used for: determining, based on a driving speed of the vehicle, a plurality of vibration signals and a plurality of sound signals corresponding to the driving speed; Based on a coherence result between the plurality of sound signals and the plurality of vibration signals, a target vibration signal corresponding to the driving speed is selected from the plurality of vibration signals; the coherence result indicates a correlation between the vibration signal and the sound signal.

14. The device according to claim 13, wherein The device is also used for: Based on a plurality of coherence results between the plurality of sound signals and the plurality of vibration signals, selecting a preset number of coherence results from the plurality of coherence results; Among the multiple vibration signals, vibration signals corresponding to the preset number of coherence results are selected as the target vibration signals.

15. The device according to claim 14, wherein The device is also used for: According to the sizes of the multiple coherence results, the multiple coherence results are sorted in a preset order to obtain a coherence result sequence; The preset number of coherence results are selected based on the coherence result sequence.

16. The device according to claim 13, wherein The device is also used for: Obtaining a set of coherence results corresponding to the vibration signal based on an autopower spectrum of the vibration signal, autopower spectra corresponding to the multiple sound signals, and a cross-power spectrum between the vibration signal and each of the sound signals; A corresponding plurality of groups of coherence results are obtained according to the plurality of vibration signals.

17. A vehicle noise reduction system, wherein: The system comprises: The vehicle noise reduction device and speaker according to claim 12; The vehicle noise reduction device obtains a noise reduction control signal based on the target vibration signal, and sends the noise reduction control signal to the speaker; The speaker receives the noise reduction control signal to perform noise reduction.

18. An electronic device, wherein: include: processor and memory; Memory, used to store computer instructions; The processor is configured to execute the instructions stored in the memory by performing the following steps: determining, based on a driving speed of the vehicle, a target vibration signal corresponding to the driving speed; The target vibration signal is suitable for enabling a speaker to emit sound to perform noise reduction.

19. A computer-readable storage medium having computer instructions stored thereon, wherein: When this instruction is executed by the processor, the following steps are implemented: Based on the driving speed of the vehicle, a target vibration signal corresponding to the driving speed is determined; the target vibration signal is suitable for enabling a speaker to emit sound to perform noise reduction.

20. A vehicle, wherein The device comprises the vehicle noise reduction device according to claim 12, and / or the vehicle noise reduction system according to claim 17, and / or the electronic device according to claim 18.

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