In-vehicle sound signal output method of new energy vehicle and related equipment

Abstract

The invention discloses a new energy automobile interior sound signal output method and related equipment, and relates to the technical field of new energy automobiles, and the method comprises the steps: collecting driving parameters and interior noise signals of a new energy automobile during driving; a noise reduction sound signal is generated based on the in-vehicle noise signal, and the noise reduction sound signal is a sound signal used for counteracting the in-vehicle noise signal; on the basis of the driving parameters, analog sound signals are generated, and the analog sound signals are sound signals changing along with the driving parameters; and synthesizing the noise reduction sound signal and the analog sound signal to obtain a fused sound signal, and outputting the fused sound signal through a loudspeaker. According to the application, the noise reduction sound signal and the analog sound signal are fused and output, so that the requirements of noise suppression and sound experience can be balanced, the noise is reduced, the driving sound perception of a driver and passengers on the new energy automobile is increased, and the riding comfort and the driving experience can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and more specifically, to a method for outputting in-vehicle sound signals of new energy vehicles and related equipment. Background Art

[0002] As a pioneer in the green transformation of the automotive industry, the NVH (Noise, Vibration, Harshness) characteristics of new energy vehicles have become one of the key indicators for measuring their ride comfort and market competitiveness. Compared with traditional fuel vehicles, the innovation of the power system of new energy vehicles has brought about significant changes in noise sources. The disappearance of the engine and the intake and exhaust system has significantly reduced the low-frequency mechanical noise and exhaust noise, but it has also introduced new noise challenges - wind noise, road noise and high-frequency motor noise have become dominant. Although the quietness advantage of new energy vehicles during driving is obvious, the lack of the natural masking effect of engine idling noise makes environmental noise such as wind noise and road noise more prominent, which directly affects the auditory perception of passengers in the car and the overall sound quality evaluation. In other words, there is a technical problem of high environmental noise in the car in the relevant technology. Summary of the invention

[0003] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0004] The method and related devices for outputting in-vehicle sound signals of new energy vehicles provided in the present application can ensure that the noise level in the vehicle is within a comfortable range while retaining a certain sound experience by fusing and outputting the noise reduction sound signal and the analog sound signal. It can balance the needs of noise suppression and sound experience, and provide an optimized in-vehicle acoustic environment, which not only reduces noise but also increases the driver and passengers' perception of the driving sound of the new energy vehicle, thereby improving riding comfort and driving experience.

[0005] In a first aspect, the present application provides a method for outputting an in-vehicle sound signal of a new energy vehicle, comprising: collecting driving parameters and in-vehicle noise signals when the new energy vehicle is driving; generating a noise reduction sound signal based on the in-vehicle noise signal, wherein the noise reduction sound signal is a sound signal used to offset the in-vehicle noise signal; generating an analog sound signal based on the driving parameters, wherein the analog sound signal is a sound signal that changes with the driving parameters; synthesizing the noise reduction sound signal and the analog sound signal to obtain a fused sound signal, and outputting the fused sound signal through a speaker.

[0006] In a feasible implementation manner, generating a noise reduction sound signal based on the in-vehicle noise signal includes: performing signal analysis on the in-vehicle noise signal to obtain a first sound characteristic corresponding to the in-vehicle noise signal, wherein the first sound characteristic includes a first sound field center position, a first frequency, a first amplitude, and a first phase; generating a noise reduction sound signal that conforms to a second sound characteristic based on the first sound characteristic, wherein the second sound characteristic information includes a second sound field center position, a second frequency, a second amplitude, and a second phase, the second sound field center position, the second frequency, and the second amplitude are the same as the first sound field center position, the first frequency, and the first amplitude, and the second phase is opposite to the first phase.

[0007] In a feasible implementation, the generating of the analog sound signal based on the driving parameters includes: determining a third sound characteristic corresponding to the order sound of the internal combustion engine according to the driving parameters, wherein the driving parameters include vehicle speed, motor speed, pedal opening, acceleration and torque; adjusting parameters of the third sound characteristic according to a preset sound mode to obtain a fourth sound characteristic; and generating the analog sound signal by a harmonic synthesis method according to the fourth sound characteristic.

[0008] In a feasible implementation manner, synthesizing the noise reduction sound signal and the analog sound signal to obtain a fused sound signal, and outputting the fused sound signal through a speaker includes:

[0009] Acquire the first position information of the speaker and the second position information of the target driver or passenger; input the noise reduction sound signal, the simulated sound signal, the first position information and the second position information into a preset sound transfer function, and synthesize the noise reduction sound signal and the simulated sound signal according to the output result of the sound transfer function to obtain the fused sound signal.

[0010] In a feasible implementation manner, the speaker is disposed in the interior space of the new energy vehicle in a non-fixed manner.

[0011] In a feasible implementation manner, the collecting of driving parameters and in-vehicle noise signals of the new energy vehicle includes: collecting the driving parameters of the new energy vehicle through a CAN bus; collecting in-vehicle sound signals through a microphone, and analyzing to obtain a spectrum diagram of the in-vehicle sound signals; and performing frequency analysis and filtering operations on the spectrum diagram to obtain the in-vehicle noise signal.

[0012] In a feasible implementation manner, the collecting of driving parameters and in-car noise signals of the new energy vehicle includes: when the speed of the new energy vehicle does not exceed a preset speed threshold, collecting the driving parameters and in-car noise signals of the new energy vehicle.

[0013] In a second aspect, the present application also provides an in-vehicle sound signal output device for a new energy vehicle, comprising: a data acquisition unit, used to collect driving parameters and in-vehicle noise signals when the new energy vehicle is driving; a noise reduction generation unit, used to generate a noise reduction sound signal based on the in-vehicle noise signal, wherein the noise reduction sound signal is a sound signal used to offset the in-vehicle noise signal; a simulation generation unit, used to generate a simulation sound signal based on the driving parameters, wherein the simulation sound signal is a sound signal that changes with the driving parameters; a fusion output unit, used to synthesize the noise reduction sound signal and the simulation sound signal to obtain a fused sound signal, and output the fused sound signal through a speaker.

[0014] In a third aspect, the present application further provides an electronic device, comprising: a memory and a processor, wherein the processor is used to implement the steps of the method for outputting in-vehicle sound signals of a new energy vehicle as described in the first aspect when executing a computer program stored in the memory.

[0015] In a fourth aspect, the present application further provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the method for outputting in-vehicle sound signals of a new energy vehicle as described in the first aspect.

[0016] In summary, this application can effectively offset the noise in the car and reduce the noise level in the car by collecting the noise signal in the car and generating the noise reduction sound signal, providing the driver and passengers with a quieter and more comfortable driving and riding environment; by generating the analog sound signal, the driver and passengers can perceive the dynamic changes of the driving of the new energy vehicle, and even in a quiet new energy vehicle, it can provide a driving feedback similar to that of a traditional fuel vehicle, and can also cover up part of the noise in the car; by synthesizing the noise reduction sound signal with the analog sound signal to obtain a fused sound signal, and outputting the fused sound signal through the speaker, it can reduce the noise while maintaining or enhancing the sound experience of the new energy vehicle. In summary, this application can ensure that the noise level in the car is within a comfortable range by fusing and outputting the noise reduction sound signal and the analog sound signal, while retaining a certain sound experience, balancing the needs of noise suppression and sound experience, and providing an optimized acoustic environment in the car, which not only reduces noise but also increases the driver and passengers' perception of the driving sound of the new energy vehicle, and can improve riding comfort and driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 A schematic diagram of a flow chart of a method for outputting a sound signal in a new energy vehicle provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of a sound signal output device for a new energy vehicle provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "is" and "has" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0022] The term "module" or "unit" in this application refers to a computer program or a part of a computer program that has a predetermined function and works together with other related parts to achieve a predetermined goal, and can be implemented in whole or in part by using software, hardware (such as processing circuits or memories) or a combination thereof. Similarly, a processor (or multiple processors or memories) can be used to implement one or more modules or units. In addition, each module or unit can be part of an overall module or unit that includes the function of the module or unit.

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. In the following description, it is related to "some embodiments", which describes a subset of all possible embodiments, but it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0024] See also Figure 1 , Figure 1 1 is a flow chart of a method for outputting a sound signal in a new energy vehicle provided by an embodiment of the present application. The method may specifically include the following steps 101 to 104:

[0025] Step 101, collecting driving parameters and in-vehicle noise signals of the new energy vehicle when it is driving;

[0026] Specifically, the driving parameters of new energy vehicles can be collected in real time through the controller area network (CAN) bus. These parameters may include but are not limited to vehicle speed, motor speed, pedal opening, acceleration and torque, etc.; one or more microphones arranged in the car are used to collect sound signals in the car in real time to capture the interior noise signals of various areas in the car.

[0027] For example, the collection of driving parameters can be completed through the built-in sensors and ECU (electronic control unit) of new energy vehicles, while the collection of in-vehicle noise signals can be achieved by placing microphones in different parts of the new energy vehicle (such as the head position of the front passenger, the middle position of the rear seat, the central console or near the roof light panel, etc.).

[0028] By implementing step 101, the in-vehicle noise signals and driving parameters of the new energy vehicle under different driving conditions can be effectively captured, providing an accurate data basis for the subsequent generation of noise reduction sound signals and simulated sound signals.

[0029] Step 102, generating a noise reduction sound signal based on the in-vehicle noise signal, wherein the noise reduction sound signal is a sound signal used to cancel the in-vehicle noise signal;

[0030] Specifically, the noise signals collected by the microphone array in the car can be used to analyze the various noise sources and their characteristics generated during the driving of new energy vehicles in real time; then, the ANC algorithm is used to generate corresponding noise reduction sound signals for these noise sources. In some examples, in order to improve the noise reduction effect, the noise reduction sound signal generated by the noise reduction algorithm can also be dynamically adjusted and optimized according to the in-car noise signal and driving parameters of the new energy vehicle. For example, when driving at high speeds, wind noise and road noise may become the main noise sources. At this time, the noise reduction algorithm can be adjusted to focus more on the elimination of these two noises; while at low speeds or when parked, more attention can be paid to the suppression of motor noise and other low-frequency noises.

[0031] Through the implementation of step 102, a noise reduction sound signal that effectively offsets the noise inside the vehicle can be generated, and then the noise level inside the vehicle can be reduced through subsequent steps, providing a quieter and more comfortable driving and riding environment for the driver and passengers.

[0032] Step 103, generating a simulated sound signal based on the driving parameter, wherein the simulated sound signal is a sound signal that changes with the driving parameter;

[0033] Specifically, audio synthesis technology or a preset sound effect library can be used to dynamically generate simulated sound signals based on changes in collected driving parameters; this process can include parameter mapping, audio waveform generation, effect superposition and other steps to ensure that the simulated sound signal can accurately reflect the actual driving status of the new energy vehicle.

[0034] For example, when a new energy vehicle accelerates, the sound signal of the engine roar or the friction between the tires and the ground can be generated to match it according to parameters such as the vehicle speed and engine speed; similarly, when decelerating or braking, the analog sound signal can be adjusted accordingly to reflect the speed changes and braking effects of the new energy vehicle.

[0035] In some examples, in order to enhance the driving immersion, the simulated sound signal can also be combined with the visual display system of the new energy vehicle (such as the instrument panel, HUD head-up display, etc.). For example, when the new energy vehicle enters a curve, not only will the shape and angle of the curve be displayed on the screen, but the side sliding sound between the tires of the new energy vehicle and the ground and the friction sound of the brake pads will also be simulated through simulated sound signals, so that the driver and passengers can get a more realistic driving experience.

[0036] Through the implementation of step 103, a simulated sound signal can be generated, and through subsequent steps, the driver and passengers can perceive the dynamic changes of the driving of the new energy vehicle. Even in a quiet new energy vehicle, it can provide driving feedback similar to that of a traditional fuel vehicle and can also cover up some of the noise inside the vehicle.

[0037] Step 104: synthesize the noise reduction sound signal and the analog sound signal to obtain a fused sound signal, and output the fused sound signal through a speaker.

[0038] Specifically, by performing phase alignment, amplitude adjustment, frequency balancing and other steps on the noise reduction sound signal and the analog sound signal, it is possible to ensure that the two sound signals can coordinate with each other during the synthesis process to achieve the expected sound effect; then, the synthesized fused sound signal is transmitted to the speaker system inside the new energy vehicle, and the sound signal is converted into sound waves through the speaker, and finally output to the interior space of the vehicle for passengers to listen to.

[0039] By implementing step 104, the noise reduction sound signal is synthesized with the analog sound signal to obtain a fused sound signal, and the fused sound signal is output through a speaker, which can maintain or enhance the sound experience of the new energy vehicle while reducing noise.

[0040] In some embodiments, the aforementioned step 102 may include: performing signal analysis on the in-vehicle noise signal to obtain a first sound characteristic corresponding to the in-vehicle noise signal, wherein the first sound characteristic includes a first sound field center position, a first frequency, a first amplitude, and a first phase; based on the first sound characteristic, generating a noise reduction sound signal that conforms to a second sound characteristic, wherein the second sound characteristic information includes a second sound field center position, a second frequency, a second amplitude, and a second phase, and the second sound field center position, the second frequency, and the second amplitude are the same as the first sound field center position, the first frequency, and the first amplitude, and the second phase is opposite to the first phase.

[0041] Specifically, a microphone array can be used to capture the noise signal inside the car, and then these signals are subjected to spectrum analysis, time-frequency analysis or spatial sound field analysis to extract the first sound characteristics related to the noise signal inside the car; these first sound characteristics include but are not limited to the center position of the first sound field (i.e., the main source position of the noise), the first frequency (the main frequency component of the noise), the first amplitude (the intensity of the noise) and the first phase (the phase information of the noise waveform); then, based on the extracted first sound characteristics, a noise reduction sound signal that meets the second sound characteristics can be generated; in this process, one or more sound wave signals that match the noise signal inside the car in terms of the center position, frequency and amplitude of the sound field, but have opposite phases, i.e., noise reduction sound signals, can be generated; these second sound characteristics (the center position of the second sound field, the second frequency, the second amplitude and the second phase) correspond to the first sound characteristics, but the second phase is deliberately set to be opposite to the first phase to achieve destructive interference of sound waves, thereby reducing or eliminating the noise inside the car.

[0042] For example, when the in-car noise signal analysis results show that there is a 100Hz roar with an amplitude of 60dB and a phase of 0 degrees, located in the rear area of ​​the new energy vehicle: the first sound characteristics will include the center position of the sound field (the rear of the new energy vehicle), frequency (100Hz), amplitude (60dB) and phase (0 degrees); the generated noise reduction sound signal will have the same center position, frequency and amplitude of the sound field, but the phase is 180 degrees to achieve phase cancellation of the noise. In-car noise contains noise components of multiple frequencies and amplitudes. At this time, the generation of the noise reduction sound signal will perform corresponding parameter matching and phase inversion processing for these different noise components.

[0043] Through the implementation of the above-mentioned embodiment, the sound characteristics of the noise signal inside the car are analyzed and a noise reduction sound signal with an opposite phase is generated, ensuring that the noise reduction sound matches the original noise in the center position, frequency and amplitude of the sound field, thereby achieving more accurate noise cancellation, significantly reducing the noise inside the car and improving the effectiveness of the noise reduction effect.

[0044] In some embodiments, the aforementioned step 103 may include: determining a third sound characteristic corresponding to the order sound of the internal combustion engine according to driving parameters, wherein the driving parameters include vehicle speed, motor speed, pedal opening, acceleration and torque; adjusting parameters of the third sound characteristic according to a preset sound mode to obtain a fourth sound characteristic; and generating an analog sound signal through a harmonic synthesis method according to the fourth sound characteristic.

[0045] Specifically, data from sensors of new energy vehicles can be received in real time, including driving parameters such as vehicle speed, motor speed, pedal opening, acceleration and torque; based on these driving parameters, algorithms or lookup tables can be used to determine the order sound characteristics that may be generated by the internal combustion engine under the current working conditions, that is, the third sound characteristics; the third sound characteristics may include the frequency, amplitude, phase and the law of change over time of the sound. Then, the frequency, amplitude, phase and other parameters in the third sound characteristics can be fine-tuned according to preset sound modes such as user preferences, new energy vehicle brand characteristics or environmental protection requirements to obtain the fourth sound characteristics; for example, the amplitude of certain frequency components may be increased or decreased to change the timbre of the sound; or the phase of the sound may be adjusted to improve the hearing of the sound, and the adjusted sound characteristics are the fourth sound characteristics. Finally, harmonic synthesis technology can be used to synthesize an optimized analog sound signal similar to the order sound of the internal combustion engine according to the frequency, amplitude, phase and other parameters defined in the fourth sound characteristics, so as to provide drivers and passengers with a more pleasant or expected auditory experience. In addition, multi-channel audio processing technology can be used to distribute analog sound signals to different speakers of new energy vehicles for playback; by precisely controlling parameters such as the volume, phase, and delay of each speaker, the propagation effect of the sound of an internal combustion engine in the interior space can be simulated, making the driver feel as if they are in a real fuel vehicle.

[0046] For example, when a new energy vehicle accelerates or decelerates, the simulation effect of the internal combustion engine order sound can be adjusted in real time according to driving parameters such as vehicle speed and motor speed. If the preset sound mode is a sports style, the amplitude of the high-frequency component can be increased to make the sound more exciting and powerful; if the preset sound mode is a comfort style, the amplitude of the low-frequency component can be reduced to make the sound softer and quieter. In addition, the simulated sound signal can be dynamically adjusted according to the driver's operating habits (such as pedal opening) and the current state of the new energy vehicle (such as acceleration and torque) to provide a more personalized auditory experience.

[0047] Exemplarily, the subjective evaluation target of the in-car noise of the new energy vehicle during driving can be determined based on the data of competing vehicles that are close to the in-car sound quality target of the new energy vehicle; then the in-car noise signal of the target noise fuel vehicle of the new energy vehicle is collected, a sound sample library is constructed, and its order sound feature parameters are extracted, wherein the sound feature parameters include amplitude, phase, frequency, etc.; then, by analyzing the relationship between the target sound feature of the new energy vehicle and its control parameters (pedal opening, vehicle speed, motor speed), the law of the change of each sound feature parameter in the active sound system of the new energy vehicle with the accelerator pedal opening, vehicle speed, and motor speed is obtained; the harmonic synthesis algorithm is used for sound design, referring to the regular relationship between the order sound feature and the control parameter, according to the short-time Fourier transform, the order feature is extracted, and then the inverse transformation is performed to construct a sound signal composed of a series of harmonic linear combinations that change in the time domain; finally, the synthesized sound signal is subjectively evaluated to determine whether the subjective evaluation target of the in-car noise is achieved; if not, the sound signal is debugged by the order synthesis software to obtain the sound solution that is closest to the subjective evaluation target of the sound quality;

[0048] Through the implementation of the above-mentioned embodiments, a simulated sound signal is generated according to the driving parameters, which can simulate the sound characteristics of the internal combustion engine and provide the driver with a driving experience similar to that of a traditional fuel vehicle; and by adjusting / selecting the preset sound mode, the driver and passengers are allowed to adjust the sound characteristics according to their personal preferences, thereby enhancing the personalization of the driving / riding experience.

[0049] In some embodiments, the aforementioned step 104 may include: obtaining first position information of the speaker and second position information of the target driver or passenger; inputting the noise reduction sound signal, the simulated sound signal, the first position information and the second position information into a preset sound transfer function, and synthesizing the noise reduction sound signal and the simulated sound signal according to the output result of the sound transfer function to obtain a fused sound signal.

[0050] Specifically, the precise position information of the speaker can be obtained through sensors or user input devices (such as touch screens, voice assistants, etc.) inside the new energy vehicle, which includes but is not limited to the coordinates, orientation, and distance of the speaker. At the same time, the current position information of the driver and passenger, i.e., the second position information, can also be determined by using seat sensors, cameras, or other biometric technologies. Then, the noise reduction sound signal, the simulated sound signal, the first position information, and the second position information can be passed as input parameters to the preset acoustic transfer function. The acoustic transfer function is a mathematical model used to simulate the propagation characteristics of sound in the interior space of a new energy vehicle, including reflection, refraction, attenuation, and other phenomena. Finally, the noise reduction sound signal and the simulated sound signal can be synthesized according to the output result of the acoustic transfer function to obtain a fused sound signal; background noise synthesis technology can also be used in the synthesis process to further enhance the auditory experience; the output result of the acoustic transfer function reflects the expected effect of the superposition of the noise reduction sound and the simulated sound at a specific position (i.e., the position of the driver and passenger); according to this output result, the two sound signals can be appropriately adjusted and optimized to ensure that the sound heard at the driver and passenger meets the noise reduction requirements and has a good auditory experience. Finally, beamforming technology can be used to form a specific sound field distribution in the car by adjusting the phase and volume relationship between different speakers, so that the fused sound signal can be more accurately directed to the location of the target driver and passenger. In this way, even if there are other passengers or objects in other positions, it will not interfere with the auditory experience of other non-target drivers and passengers. The speakers can be distributed in the instrument panel, front and rear doors, front seat backs, etc.

[0051] Through the implementation of the above embodiments, the position information of the speaker and the driver and passengers can be taken into account, the sound signal can be synthesized through the sound transfer function, and the sound output can be adjusted according to the specific environment in the car and the target driver and passenger position, so that the sound effect is more in line with the actual driving environment, the sound field distribution in the car is optimized, and the accuracy and comfort of the sound output are improved.

[0052] In some embodiments, the aforementioned speakers are arranged in the interior space of the new energy vehicle in a non-fixed manner.

[0053] Specifically, the speaker is not permanently installed in a fixed position inside the new energy vehicle, but adopts an adjustable, movable or detachable installation mechanism to allow the user or the system to flexibly adjust the position of the speaker according to actual needs to achieve the best sound experience or meet specific usage scenarios.

[0054] For example, in new energy vehicles, speakers can be installed using magnetic or slide rail installation methods. Magnetic speakers are attached to the metal surface inside new energy vehicles through strong magnets, and users can easily move the speakers to different positions according to their preferences or sound requirements. Slide rail speakers are installed on a preset slide rail, and users can adjust the position of the speaker through a sliding device to adapt to different riding layouts or driving modes.

[0055] Through the implementation of the above-mentioned embodiments, non-fixed speakers provide greater layout flexibility. The speaker position can be adjusted according to the actual layout of the interior space and passenger needs, the sound effect can be optimized, and it can adapt to different interior layouts and needs, ensuring that every passenger can enjoy a good sound experience, thereby enhancing the adaptability and flexibility of the sound system.

[0056] In some embodiments, the aforementioned step 101 may include: collecting driving parameters of the new energy vehicle through the CAN bus; collecting the sound signal inside the vehicle through a microphone, and analyzing it to obtain a spectrum diagram of the sound signal inside the vehicle; performing frequency analysis and filtering operations on the spectrum diagram to obtain a noise signal inside the vehicle.

[0057] Specifically, the driving parameters of new energy vehicles can be collected through the CAN bus; this step involves interface communication with the CAN network of new energy vehicles to obtain driving parameters including vehicle speed, acceleration, engine speed, etc. in real time. The sound signal inside the car can be collected through a microphone: multiple microphones are arranged inside the new energy vehicle to capture sound signals from different directions. These microphones can be highly sensitive and can capture subtle sound changes. The spectrum of the sound signal inside the car can be analyzed: the collected sound signal is subjected to fast Fourier transform (FFT) or other spectrum analysis methods to obtain the spectrum of the sound signal. The spectrum can be subjected to frequency analysis and filtering operations: according to the spectrum, the main frequency components of the noise signal inside the car are identified, and the noise signal in the spectrum is filtered by designing a suitable filter (such as a band-stop filter, a band-pass filter, etc.) to extract a pure noise signal inside the car.

[0058] Through the implementation of the above embodiments, the CAN bus is used to collect driving parameters and the microphone is used to collect sound signals inside the car, thereby achieving efficient data collection and processing; the frequency analysis and filtering operations on the spectrum diagram can more accurately identify and extract the noise signal inside the car, and provide accurate data for subsequent noise reduction processing.

[0059] In some embodiments, the aforementioned step 101 can be implemented in the following manner: when the speed of the new energy vehicle does not exceed a preset speed threshold, the driving parameters and the in-vehicle noise signal of the new energy vehicle are collected.

[0060] Specifically, when the speed of the new energy vehicle does not reach or exceed the preset speed threshold, the collection process of driving parameters and in-vehicle noise signals is triggered and executed. For example, the preset speed threshold can be 120km / h. This preset speed threshold is set based on a comprehensive evaluation of the power system noise, airflow noise, tire noise and road noise of the new energy vehicle at different speeds, aiming to ensure that the in-vehicle noise signal can be effectively and economically collected when the vehicle speed is low, while avoiding unnecessary power consumption and system overload when driving at high speeds, which affects the overall energy efficiency ratio and system stability of the new energy vehicle.

[0061] It should be noted that, on the one hand, when driving at high speed, the sound generated by the power system of the new energy vehicle itself (such as the electric motor) may be loud enough to cover the noise inside the car; at this time, collecting the driving parameters and the noise signal inside the car when the new energy vehicle is driving may consume additional electricity, and this electricity is unnecessary for the overall energy efficiency ratio of the new energy vehicle when driving at high speed; through the implementation of the above embodiment, this unnecessary energy consumption can be avoided. On the other hand, when driving at high speed, the airflow noise, tire noise and road noise inside and outside the new energy vehicle will increase significantly; if data collection, noise reduction sound signal generation, analog sound signal generation and fusion signal generation are performed again, it may cause the new energy vehicle system to be overloaded or unstable, and even generate new noise; through the implementation of the above embodiment, setting the vehicle speed threshold can ensure that the new energy vehicle system operates within a controllable range and maintain the stability and reliability of the new energy vehicle system.

[0062] In summary, this application can effectively offset the noise in the car and reduce the noise level in the car by collecting the noise signal in the car and generating the noise reduction sound signal, providing the driver and passengers with a quieter and more comfortable driving and riding environment; by generating the analog sound signal, the driver and passengers can perceive the dynamic changes of the driving of the new energy vehicle, and even in a quiet new energy vehicle, it can provide a driving feedback similar to that of a traditional fuel vehicle, and can also cover up part of the noise in the car; by synthesizing the noise reduction sound signal with the analog sound signal to obtain a fused sound signal, and outputting the fused sound signal through the speaker, it can reduce the noise while maintaining or enhancing the sound experience of the new energy vehicle. In summary, this application can ensure that the noise level in the car is within a comfortable range by fusing and outputting the noise reduction sound signal and the analog sound signal, while retaining a certain sound experience, balancing the needs of noise suppression and sound experience, and providing an optimized acoustic environment in the car, which not only reduces noise but also increases the driver and passengers' perception of the driving sound of the new energy vehicle, and can improve riding comfort and driving experience.

[0063] Furthermore, as an implementation of the aforementioned method embodiment, the present application also provides a new energy vehicle in-vehicle sound signal output device, which is used to implement the aforementioned method embodiment. The device embodiment corresponds to the aforementioned method embodiment. For ease of reading, the present new energy vehicle in-vehicle sound signal output device embodiment will no longer repeat the details of the aforementioned method embodiment one by one, but it should be clear that the device in the embodiment of the present application can correspond to and implement all the contents of the aforementioned method embodiment. Figure 2 As shown, the in-vehicle sound signal output device 20 of the new energy vehicle includes: a data acquisition unit 201, which is used to collect driving parameters and in-vehicle noise signals when the new energy vehicle is driving; a noise reduction generation unit 202, which is used to generate a noise reduction sound signal based on the in-vehicle noise signal, wherein the noise reduction sound signal is a sound signal used to offset the in-vehicle noise signal; a simulation generation unit 203, which is used to generate a simulation sound signal based on the driving parameters, wherein the simulation sound signal is a sound signal that changes with the driving parameters; a fusion output unit 204, which is used to synthesize the noise reduction sound signal and the simulation sound signal to obtain a fusion sound signal, and output the fusion sound signal through a speaker.

[0064] In some embodiments, the noise reduction generation unit 202 is also used to perform signal analysis on the in-vehicle noise signal to obtain a first sound characteristic corresponding to the in-vehicle noise signal, wherein the first sound characteristic includes a first sound field center position, a first frequency, a first amplitude and a first phase; based on the first sound characteristic, a noise reduction sound signal conforming to a second sound characteristic is generated, wherein the second sound characteristic information includes a second sound field center position, a second frequency, a second amplitude and a second phase, the second sound field center position, the second frequency and the second amplitude are the same as the first sound field center position, the first frequency and the first amplitude, and the second phase is opposite to the first phase.

[0065] In some embodiments, the simulation generation unit 203 is also used to determine a third sound characteristic corresponding to the order sound of the internal combustion engine according to driving parameters, wherein the driving parameters include vehicle speed, motor speed, pedal opening, acceleration and torque; according to a preset sound mode, the third sound characteristic is parameter adjusted to obtain a fourth sound characteristic; and according to the fourth sound characteristic, a simulated sound signal is generated by a harmonic synthesis method.

[0066] In some embodiments, the fusion output unit 204 is also used to obtain the first position information of the speaker and the second position information of the target driver and passenger; the noise reduction sound signal, the simulated sound signal, the first position information and the second position information are input into a preset sound transfer function, and according to the output result of the sound transfer function, the noise reduction sound signal and the simulated sound signal are synthesized to obtain a fused sound signal.

[0067] In some embodiments, the speaker is disposed in the interior space of the new energy vehicle in a non-fixed manner.

[0068] In some embodiments, the data acquisition unit 201 is also used to collect driving parameters of the new energy vehicle through the CAN bus; collect the sound signal inside the car through the microphone, and analyze it to obtain the spectrum diagram of the sound signal inside the car; perform frequency analysis and filtering operations on the spectrum diagram to obtain the noise signal inside the car.

[0069] In some embodiments, the data acquisition unit 201 is also used to collect driving parameters and in-vehicle noise signals of the new energy vehicle when the speed of the new energy vehicle does not exceed a preset speed threshold.

[0070] The present application also provides a computer-readable storage medium, which stores computer-executable instructions or computer programs. When the computer-executable instructions or computer programs are executed by a processor, the processor will be caused to execute any step of the method for outputting in-vehicle sound signals of new energy vehicles provided in the present application.

[0071] In some embodiments, the computer-readable storage medium may be a memory such as RAM, read-only memory (ROM), flash memory, magnetic surface memory, optical disk, or compact disc read-only memory (CD-ROM); or it may be various devices including one or any combination of the above memories.

[0072] In some embodiments, computer executable instructions may be in the form of a program, software, software module, script or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine or other unit suitable for use in a computing environment.

[0073] In some embodiments, computer-executable instructions may, but need not, correspond to a file in a file system, may be stored as part of a file storing other programs or data, for example, in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or code portions).

[0074] In some embodiments, computer executable instructions may be deployed to be executed on one electronic device, or on multiple electronic devices located at one site, or on multiple electronic devices distributed at multiple sites and interconnected by a communication network.

[0075] like Figure 3 As shown, the present application also provides an electronic device 30, including a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor. When the processor 320 executes the computer program 311, any step of the above-mentioned method for outputting in-vehicle sound signals of new energy vehicles is implemented.

[0076] The present application also provides a computer program product, which includes a computer program or a computer executable instruction, and the computer program or the computer executable instruction is stored in a computer-readable storage medium. The processor of the electronic device reads the computer program or the computer executable instruction from the computer-readable storage medium, and the processor executes the computer program or the computer executable instruction, so that the electronic device performs any step of the method for outputting the in-vehicle sound signal of the new energy vehicle described in the present application.

[0077] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for outputting sound signals in a new energy vehicle, characterized in that: include: Collect driving parameters and in-vehicle noise signals of new energy vehicles; Based on the in-vehicle noise signal, generating a noise reduction sound signal, wherein the noise reduction sound signal is a sound signal used to cancel the in-vehicle noise signal; Based on the driving parameter, generating a simulated sound signal, wherein the simulated sound signal is a sound signal that changes as the driving parameter changes; The noise reduction sound signal and the analog sound signal are synthesized to obtain a fused sound signal, and the fused sound signal is output through a speaker.

2. The method for outputting a sound signal in a new energy vehicle according to claim 1, characterized in that: The generating a noise reduction sound signal based on the in-vehicle noise signal comprises: Performing signal analysis on the in-vehicle noise signal to obtain a first sound characteristic corresponding to the in-vehicle noise signal, wherein the first sound characteristic includes a first sound field center position, a first frequency, a first amplitude, and a first phase; According to the first sound characteristic, a noise reduction sound signal conforming to the second sound characteristic is generated, wherein the second sound characteristic information includes a second sound field center position, a second frequency, a second amplitude and a second phase, the second sound field center position, the second frequency, and the second amplitude are the same as the first sound field center position, the first frequency, and the first amplitude, and the second phase is opposite to the first phase.

3. The method for outputting sound signals in a new energy vehicle according to claim 1, characterized in that: The step of generating a simulated sound signal based on the driving parameter comprises: Determining a third sound characteristic corresponding to the order sound of the internal combustion engine according to the driving parameters, wherein the driving parameters include vehicle speed, motor speed, pedal opening, acceleration and torque; According to the preset sound mode, adjusting the parameters of the third sound characteristic to obtain a fourth sound characteristic; The analog sound signal is generated by a harmonic synthesis method based on the fourth sound characteristic.

4. The method for outputting sound signals in a new energy vehicle according to claim 1, characterized in that: The synthesizing the noise reduction sound signal and the analog sound signal to obtain a fused sound signal, and outputting the fused sound signal through a speaker, comprises: Acquire first position information of the speaker and second position information of a target driver or passenger; The noise reduction sound signal, the simulated sound signal, the first position information and the second position information are input into a preset acoustic transfer function, and according to an output result of the acoustic transfer function, the noise reduction sound signal and the simulated sound signal are synthesized to obtain the fused sound signal.

5. The method for outputting sound signals in a new energy vehicle according to claim 4, characterized in that: The speaker is arranged in the interior space of the new energy vehicle in a non-fixed manner.

6. The method for outputting a sound signal in a new energy vehicle according to any one of claims 1 to 5, characterized in that: The collecting of driving parameters and in-vehicle noise signals of the new energy vehicle during driving includes: Collecting the driving parameters of the new energy vehicle through a CAN bus; Collecting the in-vehicle sound signal through a microphone and analyzing it to obtain a spectrum diagram of the in-vehicle sound signal; The frequency spectrum is subjected to frequency analysis and filtering operations to obtain the in-vehicle noise signal.

7. The method for outputting in-vehicle sound signals of a new energy vehicle according to any one of claims 1 to 5, characterized in that: The collecting of driving parameters and in-vehicle noise signals of the new energy vehicle during driving includes: When the speed of the new energy vehicle does not exceed a preset speed threshold, driving parameters and in-vehicle noise signals of the new energy vehicle are collected.

8. A sound signal output device in a new energy vehicle, characterized in that: include: A data acquisition unit, used to collect driving parameters and in-vehicle noise signals of new energy vehicles; a noise reduction generating unit, configured to generate a noise reduction sound signal based on the in-vehicle noise signal, wherein the noise reduction sound signal is a sound signal used to cancel the in-vehicle noise signal; A simulation generating unit, configured to generate a simulation sound signal based on the driving parameter, wherein the simulation sound signal is a sound signal that changes as the driving parameter changes; The fusion output unit is used to synthesize the noise reduction sound signal and the analog sound signal to obtain a fused sound signal, and output the fused sound signal through a speaker.

9. An electronic device, comprising: A memory and a processor, characterized in that the processor is used to implement the steps of the method for outputting in-vehicle sound signals of a new energy vehicle as described in any one of claims 1-7 when executing the computer program stored in the memory.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for outputting an in-vehicle sound signal of a new energy vehicle as described in any one of claims 1 to 7 are implemented.

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