Method, device and equipment for determining road noise signal in vehicle and storage medium

Abstract

The application relates to a method and device for determining an in-vehicle road noise signal, an equipment and a storage medium, and relates to the technical field of signal processing. The method comprises the following steps: acquiring an out-vehicle road noise signal, an engine noise signal and a noise signal inside a vehicle; determining a noise transfer function of the vehicle according to the out-vehicle road noise signal, the engine noise signal and the noise signal inside the vehicle; the noise transfer function is used for indicating the interference of external noise of the vehicle on an in-vehicle environment of the vehicle; further, determining the in-vehicle road noise signal of the vehicle according to the out-vehicle road noise signal and the noise transfer function. Thus, the technical problem that the method for determining the in-vehicle road noise signal is not accurate enough can be avoided.

Description

Technical Field

[0001] This application relates to the field of signal processing, specifically to a method, apparatus, device, and storage medium for determining in-vehicle road noise signals. Background Technology

[0002] Identifying in-vehicle road noise signals from the internal noise signals is a prerequisite for evaluating and diagnosing in-vehicle road noise signals, and also serves as a basis for setting targets and making comparative evaluations during vehicle development. At the same time, in-vehicle road noise signals are fundamental to improving in-vehicle sound quality.

[0003] In related technologies, the determination of in-vehicle road noise signals is mainly achieved through operating condition path identification. However, because engine noise signals collected outside the vehicle are coupled with road noise signals, this method of determining in-vehicle road noise signals has a technical problem of inaccuracy. Summary of the Invention

[0004] This application provides a method, apparatus, device, and storage medium for determining in-vehicle road noise signals, to at least solve the technical problem that the determined in-vehicle road noise signals are not accurate enough in related technologies. The technical solution of this application is as follows:

[0005] According to a first aspect of this application, a method for determining in-vehicle road noise signals is provided, comprising: acquiring external road noise signals, engine noise signals, and internal noise signals of a vehicle; determining a noise transfer function of the vehicle based on the external road noise signals, engine noise signals, and internal noise signals; the noise transfer function being used to indicate the interference of external noise on the in-vehicle environment; and determining the in-vehicle road noise signals based on the external road noise signals and the noise transfer function.

[0006] Based on the aforementioned technical means, this application can acquire external road noise signals, engine noise signals, and internal vehicle noise signals; and determine the vehicle's noise transfer function based on these signals. Furthermore, the vehicle's internal road noise signal is determined based on the external road noise signal and the noise transfer function. Thus, since the vehicle's noise transfer function accurately reflects the interference of external road noise signals on the vehicle's interior environment, by pre-determining the vehicle's noise transfer function, the vehicle's internal road noise signal can be accurately determined based on the acquired external road noise signal and the vehicle's noise transfer function.

[0007] In one possible implementation, the method further includes: the external road noise signal includes the road noise signal after filtering out the interference signal of the engine noise signal in the initial road noise signal; the initial road noise signal is the road noise signal collected from outside the vehicle.

[0008] Based on the aforementioned technical means, this application can obtain the external road noise signal by filtering out the interference signal of the engine noise signal from the initial road noise signal; and determine the vehicle's noise transfer function based on the external road noise signal, the engine noise signal, and the vehicle's internal noise signal. Furthermore, the vehicle's internal road noise signal is determined based on the external road noise signal and the noise transfer function. Thus, since the initial road noise signal contains interference signals coupled with the engine noise signal, filtering out these interference signals yields a more accurate external road noise signal. Consequently, the final calculated internal road noise signal will be more accurate.

[0009] In one possible implementation, the method further includes: filtering out the interference signal of the engine noise signal in the initial road noise signal according to a pre-constructed filtering function to obtain the external road noise signal; the filtering function is used to indicate the degree of interference of the engine noise signal to the initial road noise signal.

[0010] Based on the aforementioned technical means, this application can filter out the interference signal of the engine noise signal in the initial road noise signal by using a pre-constructed filtering function to obtain the external road noise signal. Thus, by pre-constructing the filtering function, a method for filtering out the interference signal of the engine noise signal in the initial road noise signal is realized. In one possible implementation, the method further includes: determining the multicoherence coefficient between the initial road noise signal and the engine noise signal based on the initial road noise signal and the engine noise signal; the multicoherence coefficient is used to indicate the coherence between the initial road noise signal and the engine noise signal; and performing an inverse Fourier transform on the multicoherence coefficient to obtain the filtering function.

[0011] Based on the aforementioned technical means, this application can determine the multicoherence coefficients between the initial road noise signal and the engine noise signal based on the initial road noise signal and the engine noise signal; and then perform an inverse Fourier transform on the multicoherence coefficients to obtain a filter function. Thus, by pre-determining the multicoherence coefficients between the initial road noise signal and the engine noise signal, and then performing an inverse Fourier transform on the multicoherence coefficients to obtain the filter function, a method for constructing a filter function is realized.

[0012] In one possible implementation, the method further includes: the external road noise signal or the initial road noise signal includes the collected vehicle tire vibration signal and the vehicle tire noise signal.

[0013] Based on the aforementioned technical means, this application can determine the external road noise signal or initial road noise signal by collecting the vehicle's tire vibration signal and tire noise signal. In this way, the spectral range of the external road noise signal or initial road noise signal covered by the collected vehicle's tire vibration signal and tire noise signal will be larger, accurately reflecting the characteristics of the external road noise signal or initial road noise signal.

[0014] In one possible implementation, the method further includes: the tire vibration signal or tire noise signal is collected from at least one tire of the vehicle.

[0015] Based on the aforementioned technical means, this application can obtain tire vibration signals or tire noise signals from at least one tire of a vehicle. Thus, the external road noise signal or initial road noise signal is obtained from at least one tire of the vehicle, and the obtained in-vehicle road noise signal is determined to be the road noise signal generated at the corresponding at least one tire of the vehicle and transmitted into the vehicle. This provides a method for determining the in-vehicle road noise signal transmitted by the road noise signal generated at at least one tire of the vehicle. Engineers can compare the impact of different tire locations on the in-vehicle road noise signal and adjust and optimize the tire locations with a higher impact on the in-vehicle road noise signal to further improve in-vehicle road noise.

[0016] According to a second aspect of this application, an apparatus for determining in-vehicle road noise signals is provided, comprising an acquisition unit and a determination unit; the acquisition unit is configured to acquire external road noise signals, engine noise signals, and internal noise signals of a vehicle; the determination unit is configured to determine a noise transfer function of the vehicle based on the external road noise signals, engine noise signals, and internal noise signals; the noise transfer function is used to indicate the interference of external noise on the in-vehicle environment; the determination unit is further configured to determine in-vehicle road noise signals based on the external road noise signals and the noise transfer function.

[0017] In one possible implementation, the aforementioned external road noise signal includes a road noise signal after filtering out the interference signal of the engine noise signal from the initial road noise signal; the initial road noise signal is a road noise signal collected from outside the vehicle.

[0018] In one possible implementation, the above-mentioned device further includes: a filtering unit; the filtering unit is used to filter out the interference signal of the engine noise signal in the initial road noise signal according to a pre-constructed filtering function to obtain the external road noise signal; the filtering function is used to indicate the degree of interference of the engine noise signal to the initial road noise signal.

[0019] In one possible implementation, the above-mentioned device further includes: a processing unit; a determining unit, further configured to determine a multicoherence coefficient between the initial road noise signal and the engine noise signal based on the initial road noise signal and the engine noise signal; the multicoherence coefficient is used to indicate the coherence between the initial road noise signal and the engine noise signal; the processing unit is configured to perform inverse Fourier transform processing on the multicoherence coefficient to obtain a filtering function.

[0020] In one possible implementation, the aforementioned external road noise signal or initial road noise signal includes the collected vehicle tire vibration signal and the vehicle tire noise signal.

[0021] In one possible implementation, the aforementioned tire vibration signal or tire noise signal is collected from at least one tire of the vehicle.

[0022] According to a third aspect provided in this application, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement the method of the first aspect described above and any possible implementation thereof.

[0023] According to a fourth aspect provided in this application, a computer-readable storage medium is provided that, when the instructions in the computer-readable storage medium are executed by a processor of an electronic device, enables the electronic device to perform the methods described in the first aspect and any possible implementation thereof.

[0024] According to the fifth aspect provided in this application, a computer program product is provided, the computer program product including computer instructions, which, when executed on an electronic device, cause the electronic device to perform the method described in the first aspect and any possible implementation thereof.

[0025] It should be noted that the technical effects of any of the implementation methods in aspects two through five can be found in the technical effects of the corresponding implementation methods in aspect one, and will not be repeated here.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application.

[0027] Therefore, the above-mentioned technical features of this application have the following beneficial effects:

[0028] (1) The vehicle's external road noise signal, engine noise signal, and internal noise signal can be acquired. Based on these signals, the vehicle's noise transfer function can be determined. Furthermore, the vehicle's internal road noise signal can be determined based on the external road noise signal and the noise transfer function. Since the vehicle's noise transfer function accurately reflects the interference of external road noise signals on the vehicle's interior environment, by pre-determining the vehicle's noise transfer function, the vehicle's internal road noise signal can be accurately determined based on the acquired external road noise signal and the vehicle's noise transfer function.

[0029] (2) The external road noise signal can be obtained by filtering out the interference signal of the engine noise signal from the initial road noise signal. Based on the external road noise signal, the engine noise signal, and the noise signal inside the vehicle, the vehicle's noise transfer function can be determined. Furthermore, the vehicle's internal road noise signal can be determined based on the external road noise signal and the noise transfer function. Thus, since the initial road noise signal contains interference signals coupled with the engine noise signal, filtering out these interference signals yields a more accurate external road noise signal. Consequently, the final calculated internal road noise signal will be more accurate.

[0030] (3) The interference signal of engine noise signal in the initial road noise signal can be filtered out by using a pre-constructed filtering function to obtain the external road noise signal. In this way, by pre-constructing the filtering function, a method for filtering out the interference signal of engine noise signal in the initial road noise signal is realized.

[0031] (4) The multicoherence coefficients between the initial road noise signal and the engine noise signal can be determined based on the initial road noise signal and the engine noise signal; and the filter function can be obtained by performing an inverse Fourier transform on the multicoherence coefficients. In this way, a method for constructing a filter function is realized by pre-determining the multicoherence coefficients between the initial road noise signal and the engine noise signal, and then performing an inverse Fourier transform on the multicoherence coefficients.

[0032] (5) The tire vibration signal and tire noise signal of the vehicle can be identified as the external road noise signal or the initial road noise signal. In this way, the frequency range of the external road noise signal or the initial road noise signal covered by the acquired tire vibration signal and tire noise signal will be larger, which can accurately reflect the characteristics of the external road noise signal or the initial road noise signal.

[0033] (6) Tire vibration signals or tire noise signals can be collected from at least one tire of the vehicle. In this way, the external road noise signal or the initial road noise signal is collected from at least one tire of the vehicle, and the obtained in-vehicle road noise signal is determined to be the road noise signal generated at the corresponding at least one tire of the vehicle and transmitted to the vehicle. This provides a method for determining the in-vehicle road noise signal generated at at least one tire of the vehicle and transmitted to the vehicle. Engineers can compare the impact of different tires on the in-vehicle road noise signal, and adjust and optimize the tires with a higher impact on the in-vehicle road noise signal to further improve the in-vehicle road noise. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0035] Figure 1 This is a schematic diagram illustrating the coupling phenomenon between engine noise signal and external road noise signal according to an exemplary embodiment;

[0036] Figure 2 This is a flowchart illustrating a method for determining in-vehicle road noise signals according to an exemplary embodiment;

[0037] Figure 3 This is a flowchart illustrating yet another method for determining in-vehicle road noise signals according to an exemplary embodiment;

[0038] Figure 4 This is a flowchart illustrating yet another method for determining in-vehicle road noise signals according to an exemplary embodiment;

[0039] Figure 5 This is a schematic diagram of a sensor arrangement for collecting engine noise signals and road noise signals outside the vehicle, according to an exemplary embodiment.

[0040] Figure 6 This is a block diagram illustrating an in-vehicle road noise signal determination device according to an exemplary embodiment;

[0041] Figure 7 This is a block diagram illustrating an electronic device according to an exemplary embodiment. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0043] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0044] The inventive principle of this invention is described below:

[0045] like Figure 1 As shown, Figure 1 This diagram illustrates the coupling phenomenon between engine noise and external road noise. The external road noise signal is collected from the vehicle's tires and includes interference signals from the engine noise signal. The engine noise signal is collected from the vehicle's engine and also includes interference signals from the external road noise signal. Therefore, the collected external road noise signal is coupled with a portion of the engine noise signal, and the collected engine noise signal is coupled with a portion of the external road noise signal. The noise signal inside the vehicle is composed of external road noise, engine noise, and wind noise.

[0046] For ease of understanding, the method for determining in-vehicle road noise signals provided in this application will be described in detail below with reference to the accompanying drawings.

[0047] Figure 2 This is a flowchart illustrating a method for determining in-vehicle road noise signals according to an exemplary embodiment, such as... Figure 2 As shown, when the external road noise signal is the initial road noise signal, the method for determining the internal road noise signal includes the following steps:

[0048] S101. Electronic equipment acquires external road noise signals, engine noise signals, and internal noise signals of the vehicle.

[0049] Among them, the external road noise signal is the initial road noise signal, which is the road noise signal collected from outside the vehicle. The road noise signal includes the collected tire vibration signal and the tire noise signal of the vehicle.

[0050] As one possible implementation, the electronic device acquires the external road noise signal collected by the microphone sensor installed near the vehicle tires under driving conditions; and the electronic device acquires the external road noise signal collected by the vibration sensor installed on the steering knuckle of the vehicle tires under driving conditions.

[0051] The electronic device acquires engine noise signals collected by a vibration sensor mounted on the engine mount under driving conditions.

[0052] Electronic devices acquire noise signals inside the vehicle collected by microphone sensors located inside the vehicle during driving conditions.

[0053] It should be noted that if the engine has a three-point mounting structure, the tester needs to install a vibration sensor on each of the three mounting brackets; if the engine has a four-point mounting structure, the tester needs to install a vibration sensor on each of the four mounting brackets.

[0054] For example, driving conditions can be divided into acceleration, deceleration, and constant speed; the vibration sensor is a three-dimensional vibration sensor; the sensitivity of the microphone sensor can cover 5-256000 Hz; the sensitivity of the vibration sensor can cover 5-5000 Hz; the microphone sensor installed inside the vehicle is located close to the driver's ear; the background noise of the driving area is no more than 38 decibels, the driving road surface is dry and free of standing water, and the wind speed is no more than 5 meters per second; the driving time is more than 10 seconds, and three or more sets of test results are obtained.

[0055] Understandably, due to the large mass of the engine and the low stiffness of the suspension bushings, the energy of noise signals transmitted from the tires to the engine is relatively small. Therefore, the noise signals collected by the vibration sensors installed at the engine are mainly engine noise signals. Furthermore, because the engine has a single excitation and the airborne sound signal and the structure-based sound signal have highly consistent characteristics within the frequency band of interest, engine vibration signals can be used to characterize engine noise.

[0056] S102. The electronic equipment determines the noise transfer function of the vehicle based on the external road noise signal, the engine noise signal, and the noise signal inside the vehicle.

[0057] The noise transfer function is used to indicate the interference of external noise on the vehicle's interior environment.

[0058] As one possible implementation, the electronic device calculates the vehicle's noise transfer function based on external road noise signals, engine noise signals, and internal vehicle noise signals.

[0059] It should be noted that the external road noise signal is represented by R1(f)...R N (f) represents the first external road noise signal, R1(f) represents the first external road noise signal. N (f) represents the Nth external road noise signal; the engine noise signal is represented by E1(f)...E M (f) indicates that E1(f) represents the first engine noise signal, E M(f) represents the Mth engine noise signal; the noise signal inside the vehicle is represented by S. FLR (f) represents the vehicle's noise transfer function, denoted by H(f). The external road noise signal, engine noise signal, and internal vehicle noise signal satisfy the following formula:

[0060]

[0061] The electronic device divides the acquired external road noise signal, engine noise signal, and internal vehicle noise signal into P time domain segments, and represents the test data in each time domain segment in the form of Formula 1. The combined data satisfy the following Formula 2:

[0062]

[0063] In Formula 2, the matrix to the left of H(f) can be simplified to [RE(f)]. (M+N)×P The matrix on the right side of the equals sign can be simplified to [S FLR (f)] 1×p The noise transfer function of the vehicle is calculated to satisfy the following formula:

[0064] H(f)=[[RE(f)] (M+N)×P ×[RE(f)] T (M+N)×P ] -1 ×[S FLR (f)] 1×p Formula 3

[0065] S103. The electronic equipment determines the in-vehicle road noise signal based on the external road noise signal and the noise transfer function.

[0066] As one possible implementation, the electronic device calculates the vehicle's interior road noise signal based on the external road noise signal and the noise transmission coefficient.

[0067] It should be noted that the vehicle's in-vehicle road noise signal is represented by S. FLR-Road (f) indicates that the calculation of the vehicle's in-vehicle road noise signal satisfies the following formula:

[0068]

[0069] As is understandable, the technical solution provided in this application acquires external road noise signals, engine noise signals, and internal vehicle noise signals; and determines the vehicle's noise transfer function based on these signals. Furthermore, the vehicle's internal road noise signal is determined based on the external road noise signal and the noise transfer function. Thus, since the vehicle's noise transfer function accurately reflects the interference of external road noise signals on the vehicle's interior environment, by pre-determining the vehicle's noise transfer function, the vehicle's internal road noise signal can be accurately determined based on the acquired external road noise signal and the vehicle's noise transfer function.

[0070] In some embodiments, the external road noise signal can also be obtained by filtering out interference signals from the engine noise signal in the initial road noise signal. To achieve another method for determining the internal road noise signal, such as... Figure 3 As shown in the embodiments of this application, the method for determining in-vehicle road noise signals further includes the following steps:

[0071] S201. Electronic equipment acquires initial road noise signal and engine noise signal.

[0072] The initial road noise signal is the road noise signal collected from outside the vehicle.

[0073] As one possible implementation, electronic devices acquire tire vibration signals and tire noise signals of the vehicle under driving conditions.

[0074] The electronic device acquires engine noise signals collected by vibration sensors mounted on the engine mounts under driving conditions.

[0075] The electronic device collects the vehicle's tire vibration signal and tire noise signal as the vehicle's initial road noise signal.

[0076] It should be noted that the initial road noise signal includes tire vibration signal and tire noise signal; the tire vibration signal or tire noise signal is collected from at least one tire of the vehicle.

[0077] For example, the tire vibration signal is collected by a vibration sensor installed on the vehicle's steering knuckle; the tire noise signal is collected by microphone sensors installed in front of and behind the vehicle's wheels.

[0078] S202. The electronic equipment determines the multicoherence coefficient between the initial road noise signal and the engine noise signal based on the initial road noise signal and the engine noise signal.

[0079] Among them, the multicoherence coefficient is used to indicate the coherence between the initial road noise signal and the engine noise signal.

[0080] As one possible implementation, the electronic device calculates the multicoherence coefficient of each initial road noise signal and all acquired engine noise signals to obtain the multicoherence coefficient of the initial road noise signal and the engine signal.

[0081] For example, the multicoherence coefficient of the initial road noise signal and the engine signal is represented by γ. i RE (f) indicates.

[0082] S203. The electronic equipment performs an inverse Fourier transform on the multiple coherence coefficients to obtain a filter function.

[0083] It should be noted that the filtering function uses g. i E (t) indicates that the filter function satisfies the following formula:

[0084]

[0085] Where i is the sequence number of the initial road noise signal; when i is N, it represents the Nth initial road noise signal.

[0086] S204. The electronic equipment filters out the interference signal of the engine noise signal in the initial road noise signal according to the pre-constructed filtering function to obtain the external road noise signal.

[0087] The filtering function is used to indicate the degree of interference of the engine noise signal with the initial road noise signal.

[0088] It should be noted that the filtering function uses g. i E (t) represents the initial road noise signal, denoted by R. i (t) represents the external road noise signal, denoted by R'. i (t) indicates that the electronic device filters out the interference signal of the engine noise signal in the initial road noise signal according to the pre-constructed filtering function, and the resulting external road noise signal satisfies the following formula six:

[0089]

[0090] S205. Electronic devices acquire external road noise signals, engine noise signals, and internal noise signals of the vehicle.

[0091] Among them, the external road noise signal includes the road noise signal after filtering out the interference signal of the engine noise signal in the initial road noise signal.

[0092] S206. Electronic equipment determines the noise transfer function of a vehicle based on external road noise signals, engine noise signals, and internal vehicle noise signals.

[0093] As one possible implementation, the electronic device calculates the vehicle's noise transfer function based on external road noise signals, engine noise signals, and internal vehicle noise signals.

[0094] It should be noted that the external road noise signal is represented by R'1(f)…R' N (f) represents the engine noise signal, denoted by E1(f)…E M (f) indicates that the noise signal inside the vehicle is represented by S. FLR (f) represents the vehicle's noise transfer function, denoted by H(f). The external road noise signal, engine noise signal, and internal vehicle noise signal satisfy the following formula (equation seven):

[0095]

[0096] The electronic device divides the vehicle's external road noise signal, engine noise signal, and internal vehicle noise signal into P time domain segments. The test data in each time domain segment is represented in the form of Formula 7, and the data are combined. The combined expression satisfies the following Formula 8:

[0097]

[0098] In Formula 8, the matrix to the left of H(f) can be simplified to [R'E(f)]. (M+N)×P The matrix on the right side of the equals sign can be simplified to [S FLR (f)] 1×p The noise transfer function of the vehicle is calculated to satisfy the following formula:

[0099] H(f)=[[R'E(f)] (M+N)×P ×[R'E(f)] T (M+N)×P ] -1 ×[S FLR (f)] 1×p Formula Nine

[0100] S207. Electronic equipment determines the vehicle's interior road noise signal based on the external road noise signal and the noise transfer function.

[0101] As one possible implementation, the electronic device calculates the vehicle's interior road noise signal based on the external road noise signal and the noise transmission coefficient.

[0102] It should be noted that the in-vehicle frequency domain road noise signal is represented by S. FLR-Road (f) indicates that the frequency domain in-vehicle road noise signal of the vehicle satisfies the following formula:

[0103]

[0104] The in-vehicle time-domain road noise signal is represented by SFLR-Road (t) indicates that the time-domain in-vehicle road noise signal of the vehicle satisfies the following formula eleven:

[0105]

[0106] The electronic device processes Formula 11 above to obtain Formula 12:

[0107]

[0108] Understandably, the technical solution provided in this application determines the multicoherence coefficient between the initial road noise signal and the engine noise signal based on the initial road noise signal and the engine noise signal; and performs an inverse Fourier transform on the multicoherence coefficient to obtain a filtering function. Further, the interference signal of the engine noise signal in the initial road noise signal is filtered out according to the pre-constructed filtering function to obtain the external road noise signal. Thus, since the initial road noise signal contains interference signals coupled with the engine noise signal, filtering out the interference signals of the engine noise signal in the initial road noise signal according to the filtering function can yield a more accurate external road noise signal. Therefore, the final calculated internal road noise signal will be more accurate.

[0109] like Figure 4 As shown, Figure 4 This is a flowchart of another method for determining in-vehicle road noise signals.

[0110] S301. Testers install tire near-field microphone sensors and vibration sensors at the vehicle tires, a vibration sensor at the engine, and a microphone sensor inside the vehicle.

[0111] Among them, the tire near-field microphone sensor 401 and vibration sensor 402 are used to acquire the initial road noise signal of the vehicle; the vibration sensor 403 is used to acquire the engine noise signal of the vehicle; and the microphone sensor 404 is used to acquire the noise signal inside the vehicle.

[0112] For example, such as Figure 5 As shown, Figure 5 This is a schematic diagram of the sensor arrangement for collecting engine noise signals and external road noise signals. The testers installed one tire near-field microphone sensor 401 at the front and rear of each wheel, a vibration sensor 402 at the steering knuckle of the wheel, three vibration sensors 403 on the engine mount, and a microphone sensor 404 at the driver's headrest inside the vehicle.

[0113] S302. Electronic devices acquire the initial road noise signal and engine noise signal of the vehicle.

[0114] S303. Electronic equipment constructs an "engine-tire" multi-input multi-output model, calculates the multicoherence coefficients of the initial road noise signal and the engine noise signal, obtains the multicoherence coefficients of the filtered engine signal, and obtains the external road noise signal that filters out the interference signal of the engine noise signal.

[0115] The electronic device constructs an "engine-tire" multi-input multi-output model, which can refer to the implementation of Formula 5 in S203 and Formula 6 in S204 above, and will not be repeated here; the input consists of multiple engine noise signals and multiple initial road noise signals, and the output consists of multiple road noise signals obtained by filtering out the interference signals of the engine noise signals in the initial road noise signals.

[0116] S304, Electronic devices construct a "tire and engine-vehicle interior" multi-input single-output model, and use the working condition path recognition method to determine the transfer function of road noise signals from outside the vehicle to inside the vehicle.

[0117] The electronic device constructs a "tire and engine-interior" multi-input single-output model, which can refer to the implementation of formulas seven, eight and nine in S206 above, and will not be repeated here; the input consists of multiple road noise signals and multiple engine noise signals obtained by filtering out the interference signal of the engine noise signal in the initial road noise signal, and the output is the transfer function of the road noise signal outside the vehicle to the interior of the vehicle.

[0118] S305. The electronic device multiplies the external road noise signal with the transfer function to obtain the internal road noise signal of the vehicle.

[0119] The electronic device multiplies the external road noise signal with the transfer function to obtain the internal road noise signal of the vehicle. The implementation of formulas 10, 11 and 12 in S207 above can be referred to, and will not be repeated here.

[0120] The above primarily describes the solutions provided by the embodiments of this application from a methodological perspective. To achieve the above functions, the in-vehicle road noise signal determination device or electronic device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0121] This application embodiment can, based on the above method, exemplarily divide the in-vehicle road noise signal determination device or electronic device into functional modules. For example, the in-vehicle road noise signal determination device or electronic device may include various functional modules corresponding to each functional division, or two or more functions may be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division; in actual implementation, there may be other division methods.

[0122] Figure 6 This is a block diagram illustrating an in-vehicle road noise signal determination device according to an exemplary embodiment. (Refer to...) Figure 6 The in-vehicle road noise signal determination device 500 includes: an acquisition unit 501 and a determination unit 502.

[0123] The acquisition unit 501 is used to acquire the external road noise signal, engine noise signal and internal noise signal of the vehicle.

[0124] The determining unit 502 is used to determine the noise transfer function of the vehicle based on the external road noise signal, the engine noise signal and the noise signal inside the vehicle; the noise transfer function is used to indicate the interference of external noise on the vehicle's interior environment.

[0125] The determining unit 502 is also used to determine the in-vehicle road noise signal based on the external road noise signal and the noise transfer function.

[0126] Optionally, the external road noise signal provided in this application embodiment includes a road noise signal after filtering out the interference signal of the engine noise signal in the initial road noise signal; the initial road noise signal is a road noise signal collected from outside the vehicle.

[0127] Optionally, the in-vehicle road noise signal determination device 500 provided in this application embodiment further includes: a filtering unit 503.

[0128] The filtering unit 503 is used to filter out the interference signal of the engine noise signal in the initial road noise signal according to the pre-constructed filtering function to obtain the external road noise signal; the filtering function is used to indicate the degree of interference of the engine noise signal to the initial road noise signal.

[0129] Optionally, the in-vehicle road noise signal determination device 500 provided in this application embodiment further includes: a processing unit 504.

[0130] The determining unit 502 is further configured to determine the multicoherence coefficient between the initial road noise signal and the engine noise signal based on the initial road noise signal and the engine noise signal; the multicoherence coefficient is used to indicate the coherence between the initial road noise signal and the engine noise signal.

[0131] Processing unit 504 is used to perform inverse Fourier transform on the multiple coherence coefficients to obtain the filter function.

[0132] Optionally, the external road noise signal or initial road noise signal provided in the embodiments of this application includes the collected tire vibration signal and tire noise signal of the vehicle.

[0133] Optionally, the tire vibration signal or tire noise signal provided in this application embodiment is collected from at least one tire of the vehicle.

[0134] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0135] Figure 7 This is a block diagram illustrating an electronic device according to an exemplary embodiment. Figure 7 As shown, the electronic device 600 includes, but is not limited to, a processor 601 and a memory 602.

[0136] The memory 602 described above is used to store the executable instructions of the processor 601. It is understood that the processor 601 is configured to execute instructions to implement the method for determining in-vehicle road noise signals in the above embodiments.

[0137] It should be noted that those skilled in the art will understand that Figure 7 The electronic device structure shown does not constitute a limitation on the electronic device; the electronic device may include, but is not limited to, other electronic devices. Figure 7 This may indicate more or fewer components, or a combination of certain components, or a different arrangement of components.

[0138] Processor 601 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in memory 602, and by calling data stored in memory 602, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. Processor 601 may include one or more processing units. Optionally, processor 601 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into processor 601.

[0139] The memory 602 can be used to store software programs and various data. The memory 602 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, application programs required by at least one functional module (such as a determination unit, processing unit, etc.), etc. Furthermore, the memory 602 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0140] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 602 including instructions, which can be executed by a processor 601 of an electronic device 600 to implement the method for determining in-vehicle road noise signals in the above embodiments.

[0141] In actual implementation, Figure 6 The functions of the acquisition unit 501, determination unit 502, filtering unit 503, and processing unit 504 can all be provided by... Figure 7 The processor 601 calls the computer program stored in the memory 602 to implement the process. The specific execution process can be found in the description of the method for determining in-vehicle road noise signals in the previous embodiment, and will not be repeated here.

[0142] Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium, such as a read-only memory (ROM), random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device.

[0143] In an exemplary embodiment, this application also provides a computer program product including one or more instructions, which can be executed by a processor 601 of an electronic device to complete the method for determining in-vehicle road noise signals in the above embodiments.

[0144] It should be noted that when one or more instructions in the computer-readable storage medium or computer program product are executed by the processor of the electronic device, they implement the various processes of the above-described method for determining in-vehicle road noise signals and achieve the same technical effect as the above-described method for determining in-vehicle road noise signals. To avoid repetition, they will not be described again here.

[0145] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0146] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another apparatus, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0147] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the classified units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0148] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0149] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, essentially, or the part that contributes to the prior art, or a complete or partial classification of the technical solution, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0150] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for determining in-vehicle road noise signals, characterized in that, The method includes: Acquire external road noise signals, engine noise signals, and internal noise signals of the vehicle; wherein, the external road noise signals include road noise signals after filtering out interference signals from the engine noise signals in the initial road noise signals; the initial road noise signals are road noise signals collected from outside the vehicle; Based on the external road noise signal, the engine noise signal, and the internal noise signal of the vehicle, the noise transfer function of the vehicle is determined; the noise transfer function is used to indicate the interference of external noise on the vehicle's internal environment. The in-vehicle road noise signal is determined based on the external road noise signal and the noise transfer function. The external road noise signal is determined in the following way: The interference signal of the engine noise signal in the initial road noise signal is filtered out according to a pre-constructed filtering function to obtain the external road noise signal; the filtering function is used to indicate the degree of interference of the engine noise signal on the initial road noise signal; Wherein, the external road noise signal satisfies the following formula: ； in, Used to represent the external road noise signal. Used to represent the filtering function. The initial road noise signal is used to represent the initial road noise signal, and i is used to represent the sequence number of the initial road noise signal. When i is N, it represents the Nth initial road noise signal. The filtering function is determined in the following way: Based on the initial road noise signal and the engine noise signal, a multicoherence coefficient is determined between the initial road noise signal and the engine noise signal; the multicoherence coefficient is used to indicate the coherence between the initial road noise signal and the engine noise signal. The filtering function is obtained by performing an inverse Fourier transform on the multiple coherence coefficients. The filtering function satisfies the following formula: ； in, Used to represent the multicoherence coefficient between the initial road noise signal and the engine signal.

2. The method according to claim 1, characterized in that, The method further includes: The external road noise signal or the initial road noise signal includes the collected tire vibration signal and tire noise signal of the vehicle.

3. The method according to claim 2, characterized in that, The method further includes: The tire vibration signal or the tire noise signal is collected from at least one tire of the vehicle.

4. A device for determining in-vehicle road noise signals, characterized in that, It includes an acquisition unit, a determination unit, a filtering unit, and a processing unit; The acquisition unit is used to acquire the external road noise signal, engine noise signal, and internal noise signal of the vehicle; wherein, the external road noise signal includes the road noise signal after filtering out the interference signal of the engine noise signal in the initial road noise signal; the initial road noise signal is the road noise signal collected from outside the vehicle; The determining unit is used to determine the noise transfer function of the vehicle based on the external road noise signal, the engine noise signal, and the noise signal inside the vehicle; the noise transfer function is used to indicate the interference of the external noise of the vehicle on the interior environment of the vehicle. Wherein, the external road noise signal satisfies the following formula: ； in, Used to represent the external road noise signal. Used to represent a filter function The initial road noise signal is used to represent the initial road noise signal, and i is used to represent the sequence number of the initial road noise signal. When i is N, it represents the Nth initial road noise signal. The determining unit is further configured to determine the in-vehicle road noise signal of the vehicle based on the external road noise signal and the noise transfer function; The filtering unit is used to filter out the interference signal of the engine noise signal in the initial road noise signal according to a pre-constructed filtering function to obtain the external road noise signal; the filtering function is used to indicate the degree of interference of the engine noise signal to the initial road noise signal; The determining unit is further configured to determine a multicoherence coefficient between the initial road noise signal and the engine noise signal based on the initial road noise signal and the engine noise signal; the multicoherence coefficient is used to indicate the coherence between the initial road noise signal and the engine noise signal; The processing unit is used to perform inverse Fourier transform processing on the multiple coherence coefficients to obtain the filtering function; The filtering function satisfies the following formula: ； in, Used to represent the multicoherence coefficient between the initial road noise signal and the engine signal.

5. The apparatus according to claim 4, characterized in that, The external road noise signal or the initial road noise signal includes the collected tire vibration signal and tire noise signal of the vehicle.

6. The apparatus according to claim 5, characterized in that, The tire vibration signal or the tire noise signal is collected from at least one tire of the vehicle.

7. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the method as described in any one of claims 1 to 3.

8. A computer-readable storage medium, characterized in that, When the computer-executable instructions stored in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device is capable of performing the method as described in any one of claims 1 to 3.

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