New energy vehicle in-vehicle sound signal output method and related device

Abstract

The application discloses a new energy automobile in-vehicle sound signal output method and related equipment, and relates to the technical field of new energy automobiles, and the method comprises the following steps: collecting driving parameters and in-vehicle noise signals when the new energy automobile is driving; generating a noise reduction sound signal based on the in-vehicle noise signals, wherein the noise reduction sound signal is a sound signal used for canceling the in-vehicle noise signals; generating a simulation sound signal based on the driving parameters, wherein the simulation sound signal is a sound signal that changes with the driving parameters; synthesizing the noise reduction sound signal and the simulation sound signal to obtain a fusion sound signal, and outputting the fusion sound signal through a loudspeaker. The application can balance the demand for noise suppression and sound experience by fusing and outputting the noise reduction sound signal and the simulation sound signal, reduces noise, increases the driving sound perception of the driver and passengers to the new energy automobile, and can improve the riding comfort and driving experience.

Description

Technical Field

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

[0002] As pioneers in the automotive industry's green transformation, new energy vehicles (NEVs) are increasingly using NVH (Noise, Vibration, Harshness) characteristics as a key indicator of ride comfort and market competitiveness. Compared to traditional fuel vehicles, the powertrain innovations of NEVs have resulted in significant changes in noise sources. The absence of the engine and intake and exhaust systems significantly reduces low-frequency mechanical and exhaust noise, but also introduces new noise challenges—wind noise, road noise, and high-frequency motor noise dominate. While NEVs offer significant advantages in quietness during driving, they lack the natural masking effect of engine idling noise, making ambient noise like wind and road noise more prominent, directly impacting passengers' auditory perception and overall sound quality evaluation. This translates to a technical issue with high ambient noise levels within the vehicle. Summary of the Invention

[0003] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention of this application is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] The method and related device for outputting in-vehicle sound signals of new energy vehicles provided in this 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 ride comfort and driving experience.

[0005] In a first aspect, the present application provides a method for outputting in-vehicle sound signals 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 changes in 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 an implementable embodiment, the generating of the noise reduction sound signal based on the in-vehicle noise signal comprises: performing signal analysis on the in-vehicle noise signal to obtain first sound characteristics corresponding to the in-vehicle noise signal, wherein the first sound characteristics comprise a first sound field center position, a first frequency, a first amplitude and a first phase; and generating a noise reduction sound signal conforming to second sound characteristics according to the first sound characteristics, wherein the second sound characteristics comprise 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 correspond to 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 an implementable embodiment, the generating of the simulated sound signal based on the driving parameter comprises: determining third sound characteristics corresponding to an internal combustion engine order sound according to the driving parameter, wherein the driving parameter comprises a vehicle speed, a motor speed, a pedal opening degree, an acceleration and a torque; performing parameter adjustment on the third sound characteristics according to a preset sound mode to obtain fourth sound characteristics; and generating the simulated sound signal by a harmonic synthesis method according to the fourth sound characteristics.

[0008] In an implementable embodiment, the synthesizing of the noise reduction sound signal and the simulated sound signal to obtain a fusion sound signal and the outputting of the fusion sound signal by a loudspeaker comprises:

[0009] obtaining first position information of the loudspeaker and second position information of a 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 transmission function, and synthesizing the noise reduction sound signal and the simulated sound signal according to an output result of the sound transmission function to obtain the fusion sound signal.

[0010] In an implementable embodiment, the loudspeaker is arranged in an internal space of the new energy vehicle in a non-fixed manner.

[0011] In an implementable embodiment, the collecting of the driving parameter and the in-vehicle noise signal during driving of the new energy vehicle comprises: collecting the driving parameter of the new energy vehicle through a CAN bus; collecting an in-vehicle sound signal through a microphone and analyzing to obtain a spectrum diagram of the in-vehicle sound signal; and performing frequency analysis and filtering operation on the spectrum diagram to obtain the in-vehicle noise signal.

[0012] In an implementable embodiment, the collecting the driving parameter and the in-vehicle noise signal when the new energy vehicle is driving comprises: collecting the driving parameter and the in-vehicle noise signal when the speed of the new energy vehicle is below a preset speed threshold.

[0013] In a second aspect, the present application further provides an in-vehicle sound signal output device for a new energy vehicle, comprising: a data acquisition unit configured to collect a driving parameter and an in-vehicle noise signal when the new energy vehicle is driving; a noise reduction generation 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; an analog generation unit configured to generate an analog sound signal based on the driving parameter, wherein the analog sound signal is a sound signal that changes with the driving parameter; and a fusion output unit configured to synthesize the noise reduction sound signal and the analog sound signal to obtain a fusion sound signal, and output the fusion sound signal through a loudspeaker.

[0014] In a third aspect, the present application further provides an electronic device, comprising: a memory and a processor, wherein the processor is configured to execute a computer program stored in the memory to implement the steps of the in-vehicle sound signal output method for a new energy vehicle according to the first aspect.

[0015] In a fourth aspect, the present application further provides a computer readable storage medium storing a computer program, wherein the computer program is executed by a processor to implement the steps of the in-vehicle sound signal output method for a new energy vehicle according to the first aspect.

[0016] In summary, the present application can effectively cancel the noise in the vehicle, reduce the noise level in the vehicle, and provide a more quiet and comfortable driving and riding environment for the driver and passengers by collecting the in-vehicle noise signal and generating the noise reduction sound signal. The driving dynamic change of the new energy vehicle can be perceived by the driver and passengers by generating the analog sound signal, even in a quiet new energy vehicle, which can provide a similar driving feedback feeling to a traditional fuel vehicle and can also mask part of the noise in the vehicle. The fusion sound signal obtained by synthesizing the noise reduction sound signal and the analog sound signal, and outputting the fusion sound signal through the loudspeaker, can reduce the noise while maintaining or enhancing the sound experience of the new energy vehicle. In summary, the present application can ensure that the noise level in the vehicle is within a comfortable range while retaining a certain sound experience, balance the needs of noise suppression and sound experience, provide an optimized in-vehicle acoustic environment, reduce noise and increase the driving sound perception of the new energy vehicle for the driver and passengers, and improve the riding comfort and driving experience. BRIEF DESCRIPTION OF DRAWINGS

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present description. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0018] Figure 1 A flow chart of a method for outputting sound signals 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," and the like (if any) in the specification and claims of this application and in the accompanying drawings are used to distinguish similar objects, rather than to describe a particular order or sequential sequence. It should be understood that the terms used in this manner are 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, e.g., a process, method, system, product, or apparatus comprising a series of steps or units need not be limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] The term "module" or "unit" in this application refers to a computer program or 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 functions 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 embodiments described are only some embodiments of the present application, not all embodiments. In the following description, "some embodiments" are mentioned, which describe a subset of all possible embodiments. However, it is 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 10 is a flow chart of a method for outputting an in-vehicle sound signal of 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 a 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 vehicle can be used to collect sound signals in the vehicle in real time to capture the vehicle noise signals in various areas of the vehicle.

[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 interior 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 inside the vehicle can be used to analyze in real time the various noise sources and their characteristics generated during the driving of the new energy vehicle; 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 signals generated by the noise reduction algorithm can also be dynamically adjusted and optimized according to the in-vehicle noise signals 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 eliminating these two types of noise; while when driving at low speeds or parking, more attention can be paid to suppressing motor noise and other low-frequency noises.

[0031] By implementing 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 an analog sound signal based on the driving parameter, wherein the analog sound signal is a sound signal that changes as the driving parameter changes;

[0033] Specifically, audio synthesis technology or a preset sound effects 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 engine roar or sound signal of tire friction with the ground can be generated to match it based on parameters such as vehicle speed and engine speed; similarly, when decelerating or braking, the analog sound signal can also be adjusted accordingly to reflect the speed changes and braking effects of the new energy vehicle.

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

[0036] By implementing step 103, a simulated sound signal can be generated, and subsequent steps can allow the driver and passengers to perceive the dynamic changes in 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 mask 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, the noise reduction sound signal and the analog sound signal can be phase aligned, amplitude adjusted, and frequency balanced 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 fusion 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 car for passengers to listen to.

[0039] By implementing step 104, 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 the 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 the center position of the first sound field, the first frequency, the first amplitude and the first phase; based on the first sound characteristic, generating a noise reduction sound signal that meets the second sound characteristic, wherein the second sound characteristic information includes the center position of the second sound field, the second frequency, the second amplitude and the second phase, the center position of the second sound field, the second frequency and the second amplitude are the same as the center position of the first sound field, 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 can be 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, if the in-car noise signal analysis results indicate the presence of a 100Hz roar with an amplitude of 60dB and a phase of 0 degrees located in the rear area of ​​a new energy vehicle, the first sound characteristics will include the sound field center position (rear of the new energy vehicle), frequency (100Hz), amplitude (60dB), and phase (0 degrees). The generated noise reduction sound signal will have the same sound field center position, frequency, and amplitude, but with a phase of 180 degrees to achieve phase cancellation of the noise. In-car noise contains noise components of various frequencies and amplitudes. In this case, the noise reduction sound signal generation will perform corresponding parameter matching and phase inversion processing for these different noise components.

[0043] Through the implementation of the above 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 based on driving parameters, wherein the driving parameters include vehicle speed, motor speed, pedal opening, acceleration and torque; adjusting the parameters of the third sound characteristic according to a preset sound pattern to obtain a fourth sound characteristic; and generating an analog sound signal based on the fourth sound characteristic through a harmonic synthesis method.

[0045] Specifically, real-time data from new energy vehicle sensors can be received, including driving parameters such as vehicle speed, motor speed, pedal stroke, acceleration, and torque. Based on these driving parameters, an algorithm or lookup table can be used to determine the order sound characteristics likely produced by the internal combustion engine under current operating conditions, known as the third sound characteristic. This third sound characteristic can include the sound's frequency, amplitude, phase, and temporal variation. Next, the frequency, amplitude, and phase parameters of the third sound characteristic can be fine-tuned based on preset sound patterns, such as user preferences, new energy vehicle brand characteristics, or environmental requirements, to produce the fourth sound characteristic. For example, the amplitude of certain frequency components can be increased or decreased to change the sound's timbre, or the phase of the sound can be adjusted to improve the sound's auditory quality. The adjusted sound characteristic becomes the fourth sound characteristic. Finally, harmonic synthesis technology can be used to synthesize an optimized analog sound signal similar to the internal combustion engine's order sound based on the frequency, amplitude, and phase parameters defined in the fourth sound characteristic, thereby providing a more pleasant or expected auditory experience for the driver and passengers. 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 vehicle's interior 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 simulated sound effects of the internal combustion engine's order sounds can be adjusted in real time based on driving parameters such as vehicle speed and motor speed. If the preset sound mode is Sport, the amplitude of high-frequency components can be increased to make the sound more exciting and powerful; if the preset sound mode is Comfort, the amplitude of low-frequency components can be reduced to make the sound softer and more tranquil. Furthermore, the simulated sound signal can be dynamically adjusted based on 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 listening experience.

[0047] For example, the subjective evaluation target of the interior noise of the new energy vehicle during driving can be determined based on the data of competing vehicles that are close to the interior sound quality target of the new energy vehicle; then the interior 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, where the sound feature parameters include amplitude, phase, frequency, etc.; then, by analyzing the relationship between the target sound characteristics of the new energy vehicle and its control parameters (pedal opening, vehicle speed, motor speed), the law of change of each sound feature parameter in the active sound generation system of the new energy vehicle with the accelerator pedal opening, vehicle speed, and motor speed is obtained; a harmonic synthesis algorithm is used for sound design, referring to the regular relationship between the order sound characteristics and the control parameters, according to the short-time Fourier transform, the order characteristics are 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 interior noise is achieved; if not, the sound signal is debugged by order synthesis software to obtain a sound solution that is closest to the subjective evaluation target of the sound quality;

[0048] Through the implementation of the above embodiment, 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 the first position information of the speaker and the 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 loudspeakers 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 loudspeakers. At the same time, the current position information of the driver and passengers, i.e., the second position information, can also be determined using seat sensors, cameras, or other biometric identification 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 pre-set sound transmission function. The sound transmission function is a mathematical model that simulates the propagation characteristics of sound in the interior space of the new energy vehicle, including reflection, refraction, attenuation, and other phenomena. Finally, the noise reduction sound signal and the simulated sound signal can be synthesized to obtain the fusion sound signal according to the output results of the sound transmission function; background noise synthesis technology can also be used during the synthesis process to further enhance the auditory experience; the output results of the sound transmission function reflect 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 passengers); based on this output result, the two sound signals can be appropriately adjusted and optimized to ensure that the sound heard by the driver and passengers meets the noise reduction requirements and has a good auditory experience. Finally, beamforming technology can be used to adjust the phase and volume relationship between different loudspeakers to form a specific sound field distribution in the vehicle, so that the fusion sound signal can be more accurately directed to the position of the target driver and passengers. In this way, even if there are other passengers or objects at other positions, it will not interfere with the auditory experience of other non-target driver and passengers. The loudspeakers can be distributed in the instrument panel, front and rear doors, and rear seats of the front seats.

[0051] Through the implementation of the above embodiments, the position information of the loudspeakers and the driver and passengers can be considered, the sound signals can be synthesized through the sound transmission function, and the sound output can be adjusted according to the specific environment in the vehicle and the position of the target driver and passengers, so that the sound effect is more consistent with the actual driving environment, the sound field distribution in the vehicle is optimized, and the accuracy and comfort of the sound output are improved.

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

[0053] Specifically, the loudspeakers are not permanently installed at a fixed position inside the new energy vehicle, but use an adjustable, movable, or detachable mounting mechanism to allow users or systems to flexibly adjust the position of the loudspeakers according to actual needs to achieve the best sound experience or meet specific use scenarios.

[0054] For example, in new energy vehicles, speakers can be mounted using either magnetic or sliding rails. Magnetic speakers attach to metal surfaces inside the vehicle using strong magnets, allowing users to easily move the speakers to different locations based on their preferences or sound quality needs. Sliding rail speakers, on the other hand, are mounted on pre-set rails, allowing users to adjust the speaker's position using a sliding mechanism to accommodate different seating arrangements or driving styles.

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

[0057] Specifically, the driving parameters of new energy vehicles can be collected through the CAN bus; this step involves communicating with the interface of the new energy vehicle CAN network to obtain driving parameters including vehicle speed, acceleration, engine speed, etc. in real time. The sound signal inside the vehicle 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 vehicle can be analyzed and obtained: 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: based on the spectrum, the main frequency components of the noise signal inside the vehicle are identified, and by designing appropriate filters (such as band-stop filters, band-pass filters, etc.), the noise signal in the spectrum is filtered to extract a pure noise signal inside the vehicle.

[0058] Through the implementation of the above embodiment, the CAN bus is used to collect driving parameters and the microphone is used to collect sound signals inside the vehicle, thereby achieving efficient data collection and processing; the frequency analysis and filtering operations on the spectrum graph can more accurately identify and extract the noise signal inside the vehicle, providing 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 new energy vehicle's speed does not reach or exceed a preset speed threshold, the collection of driving parameters and interior noise signals is triggered and executed. For example, the preset speed threshold may be 120 km / h. This preset speed threshold is set based on a comprehensive assessment of the new energy vehicle's powertrain noise, airflow noise, tire noise, and road noise at different speeds. It aims to ensure that interior noise signals can be collected effectively and economically at lower speeds, while avoiding unnecessary power consumption and system overload at high speeds, which could affect the overall energy efficiency and system stability of the new energy vehicle.

[0061] It should be noted that, on the one hand, when driving at high speeds, the sound generated by the new energy vehicle's own power system (such as an electric motor) may be loud enough to mask the noise inside the vehicle; at this time, collecting the driving parameters and in-vehicle noise signals of the new energy vehicle during driving may consume additional electricity, which is unnecessary for the overall energy efficiency of the new energy vehicle when driving at high speeds; through the implementation of the above embodiment, this unnecessary energy consumption can be avoided. On the other hand, when driving at high speeds, 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, it may cause the new energy vehicle system to be overloaded or unstable, or even generate new noise; through the implementation of the above embodiment, setting a 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, the present application can effectively offset the noise inside the car and reduce the noise level inside the car by collecting the noise signal inside the car and generating a noise reduction sound signal, providing the driver and passengers with a quieter and more comfortable driving and riding environment; by generating an analog sound signal, the driver and passengers can perceive the dynamic changes in 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 some of the noise inside 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 a speaker, it can reduce the noise while maintaining or enhancing the sound experience of the new energy vehicle. In summary, the present application can ensure that the noise level inside the car 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, and can balance the needs of noise suppression and sound experience, providing an optimized acoustic environment inside 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 for implementing the aforementioned method embodiment. This device embodiment corresponds to the aforementioned method embodiment. For ease of reading, this 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; an analog generation unit 203, which is used to generate an analog sound signal based on the driving parameters, wherein the analog 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 analog 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 the center position of the first sound field, the first frequency, the first amplitude and the first phase; based on the first sound characteristic, a noise reduction sound signal that meets the second sound characteristic is generated, wherein the second sound characteristic information includes the center position of the second sound field, the second frequency, the second amplitude and the second phase, the center position of the second sound field, the second frequency and the second amplitude correspond to the center position of the first sound field, 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 based on driving parameters, where the driving parameters include vehicle speed, motor speed, pedal opening, acceleration and torque; according to a preset sound pattern, the third sound characteristic is parameter-adjusted to obtain a fourth sound characteristic; and based on 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 an 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 new energy vehicles through the CAN bus; collect sound signals inside the vehicle through a microphone, and analyze and obtain a spectrum diagram of the sound signals inside the vehicle; perform frequency analysis and filtering operations on the spectrum diagram to obtain a noise signal inside the vehicle.

[0069] In some embodiments, the data acquisition unit 201 is further configured to collect driving parameters and in-vehicle noise signals of the new energy vehicle when the vehicle speed 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 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 that stores 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 coordinating files (for example, 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 across 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 computer-executable instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer program or computer-executable instructions from the computer-readable storage medium, and the processor executes the computer program or computer-executable instructions, causing the electronic device to perform any step of the method for outputting an in-vehicle sound signal for a new energy vehicle described above.

[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 inside a new energy vehicle, characterized in that: include: Collect driving parameters and in-vehicle noise signals of new energy vehicles; generating a noise reduction sound signal based on the vehicle interior noise signal, wherein the noise reduction sound signal is a sound signal used to cancel the vehicle interior noise signal; generating an analog sound signal based on the driving parameter, wherein the analog 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 sound signals in a new energy vehicle according to claim 1, wherein: The generating of a noise reduction sound signal based on the in-vehicle noise signal includes: Performing signal analysis on the interior noise signal to obtain a first sound characteristic corresponding to the interior 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 that conforms 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 correspond to 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, wherein: The generating of the simulated sound signal based on the driving parameter includes: determining a third sound characteristic corresponding to an order sound of the internal combustion engine based on 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, wherein: 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: Obtaining first position information of the speaker and second position information of a target driver or passenger; The noise reduction sound signal, the analog sound signal, the first position information and the second position information are input into a preset acoustic transfer function, and the noise reduction sound signal and the analog sound signal are synthesized according to an output result of the acoustic transfer function 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 an in-vehicle sound signal 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 includes: Collecting the driving parameters of the new energy vehicle through a CAN bus; Collecting a sound signal inside the vehicle through a microphone and analyzing it to obtain a spectrum of the sound signal inside the vehicle; Perform frequency analysis and filtering operations on the spectrum diagram to obtain the in-vehicle noise signal.

7. The method for outputting an in-vehicle sound signal 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 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 for 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 for canceling 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 fusion sound signal, and output the fusion 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 to 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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