Acceleration sound system of electric automobile and configuration method

Abstract

The invention discloses an electric automobile acceleration sound system and a configuration method, relates to the technical field of new energy automobile electric drive, and aims to enable an electric automobile to meet a howling index and solve the problem of abnormal sound of an electric drive assembly on the premise of not sacrificing performance, the electric automobile acceleration sound system comprises a data processing module connected with a loudspeaker, and the data processing module is used for obtaining the whole automobile driving working condition and matching a simulated sound source; the loudspeaker receives the simulated sound source data fed back by the data processing module, transmits the simulated sound source data to the electric drive assembly controller, and plays sound of the simulated sound source; the loudspeaker is connected with a sound amplification shell, sound played by the loudspeaker and noise of the electric drive assembly are fused and transmitted into the vehicle, according to the acceleration sound system of the electric vehicle and the configuration method, the noise abrupt property of howling can be reduced, and therefore the bad perception influence of howling on people in the vehicle is reduced; the carsickness caused by monotonous background sound of the electric automobile can be prevented, the influence of noise of the electric drive assembly on design can be reduced, and the performance of the electric automobile is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric drive for new energy vehicles, and particularly to an electric vehicle acceleration sound system and a configuration method thereof. Background Art

[0002] Compared with traditional vehicles, electric vehicles are more likely to make people carsick, mainly due to the fast acceleration response and single background noise of electric vehicles. Since the background sound of electric vehicles is relatively small, relevant noises such as motor whine and reducer whine generated by the electric drive assembly are easily manifested. To solve the whine problem of electric vehicles, the existing technology mainly adopts the scheme of improving the design index of NVH, which requires higher requirements for processing technology and equipment accuracy. Due to strict requirements and production process deviations, EOL defects occur during the offline of the motor assembly, and more than 80% of the problems are caused by the assembly noise problem. The reducer whine is related to factors such as the structural stiffness, weight, and cost of the reducer assembly. In the design of the electric drive assembly, in order to reduce the order whine, some related performances must be sacrificed.

[0003] For example, there is a Chinese patent with the publication number CN107697000A, which relates to an intelligent acceleration and sound effect control system for an electric vehicle, including a main control unit. The main control unit is connected to an acceleration operation device. In each control mode of the main control unit, the acceleration characteristics and engine sound of the electric vehicle respectively simulate the acceleration characteristics and engine sound of a supercar. The main control unit is also respectively connected to a control panel and a sound generating device. After receiving the control mode selection information, the main control unit receives the acceleration information, and then controls the electric vehicle to accelerate with the matching acceleration characteristics and controls the sound generating device to emit the matching engine sound. Using artificial intelligence to simulate the acceleration characteristics and engine sound effects of various supercars can, on the one hand, remind passers-by to notice the vehicle in time and pay attention to safety, and on the other hand, make high-end electric vehicles more fun to drive and improve market attractiveness. However, the Chinese patent with the publication number CN107697000A does not consider the whine noise of the electric drive assembly and still cannot avoid the problem of sacrificing performance to meet the whine index. Summary of the Invention

[0004] In order to enable an electric vehicle to meet the whine index without sacrificing performance and solve the abnormal sound problem of the electric drive assembly, the present invention proposes an electric vehicle acceleration sound system and a configuration method thereof, which can reduce the abruptness of whine noise, thereby reducing the adverse perception impact of whine on the vehicle occupants. It can not only prevent carsickness caused by the monotonous background sound of electric vehicles, but also reduce the impact of the noise of the electric drive assembly on the design and improve the performance of electric vehicles.

[0005] To achieve the above object, the present invention adopts the following technical solution: An electric vehicle acceleration sound system, It includes a data processing module connected to a speaker, which obtains the vehicle driving conditions and matches the artificial sound source; the speaker receives the artificial sound source data fed back by the data processing module, transmits it to the electric drive assembly controller, and plays the sound of the artificial sound source; the speaker is connected to a sound amplification shell, which fuses the sound played by the speaker with the noise of the electric drive assembly and transmits it into the vehicle.

[0006] In this technical solution, the data processing module obtains the vehicle driving conditions and the noise of the electric drive assembly, superimposes the noise with the artificial sound source to form a mixed sound that is comfortable to listen to, so as to weaken or eliminate the noise, thereby reducing the impact of the noise of the electric drive assembly on the design and improving the performance of electric vehicles.

[0007] Preferably, the data processing module includes an information receiving unit that receives the operating information of the electric drive assembly and the vehicle driving information to obtain the vehicle driving conditions; the information receiving unit is connected to a signal processing unit that identifies the artificial sound source data and matches the artificial sound source according to the vehicle driving conditions.

[0008] Preferably, the signal processing unit is connected to a control unit that receives the artificial sound source data of the signal processing unit and controls the speaker to play the sound of the artificial sound source. The output end of the control unit is connected to the speaker, and the input end of the control unit is connected to the artificial sound source unit, which stores the vehicle driving conditions and the corresponding artificial sound source data.

[0009] Preferably, the sound amplification shell is provided with a horn-shaped shell, one end of the shell is connected to a ring-shaped speaker interface, and the other end of the shell is connected to an arc-shaped sound reflection plate extending outward along a section of the outer contour of the shell.

[0010] Preferably, the sound of the artificial sound source is fused with the noise of the electric drive assembly to eliminate the noise of the electric drive assembly.

[0011] Preferably, the information receiving unit is connected to the vehicle controller and the vehicle central control.

[0012] The present invention also adopts the following technical solution: a method for configuring an electric vehicle acceleration sound system, applicable to the above-mentioned electric vehicle acceleration sound system, including: S1, collecting the sound data of the electric drive assembly under different driving conditions to obtain the sound spectrum of the electric drive assembly under different conditions; S2, analyzing the sound spectrum of the electric drive assembly under different conditions, superimposing the artificial sound source spectrum to eliminate abnormal sounds, and forming an artificial sound source database; S3, receiving the operating information of the electric drive assembly and the vehicle driving information, and analyzing to obtain the driving conditions; S4, matching the artificial sound source from the artificial sound source database according to the driving conditions and playing the sound of the artificial sound source.

[0013] Preferably, the step S2 includes: S21. Analyze the sound spectra of the electric drive assembly under different driving conditions one by one, and match the optimal artificial sound source spectra for the sound spectra of the electric drive assembly under different driving conditions. S22. Obtain a number of artificial sound sources according to the optimal artificial sound source spectra. S23. Store a number of artificial sound sources and the corresponding driving condition data to obtain an artificial sound source database.

[0014] Preferably, the superimposed artificial sound source spectra include that the mixed sound formed by mixing the sound of the electric drive assembly and the sound of the artificial sound source can weaken or eliminate the abnormal sound generated by the electric drive assembly.

[0015] Preferably, the superimposed artificial sound source spectra include that the spectrum of the mixed sound formed by mixing the sound of the electric drive assembly and the sound of the artificial sound source has a regular change.

[0016] The beneficial effects of the present invention are as follows: 1) It makes up for the defect that electric vehicles have a small and monotonous sound during driving, can not only form the unique characteristics of the whole vehicle, but also improve the riding comfort. 2) During the acceleration process of the electric vehicle, it diverts people's attention, weakens people's motion sickness feeling about the electric vehicle, and improves the experience of the electric vehicle. 3) It reduces the abruptness of the whistling noise, thereby reducing the adverse perception impact of the whistling on the vehicle occupants, reducing the influence of the noise of the electric drive assembly on the design, and improving the performance of the electric vehicle. Description of the Drawings

[0017] Figure 1 is a block diagram of an acceleration sound system of an electric vehicle according to the present invention.

[0018] Figure 2 is a flowchart of a configuration method for an acceleration sound system of an electric vehicle according to the present invention. Detailed Embodiments

[0019] To make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only the best embodiments of the present invention, only used to explain the present invention, and do not limit the protection scope of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0020] Embodiment 1 This embodiment provides an acceleration sound system for an electric vehicle, including a data processing module, a speaker and a sound amplification shell. The block diagram of the system refers to Figure 1 , which is applied to an electric vehicle and can solve the related noise problems existing in the electric drive assembly of the electric vehicle.

[0021] The data processing module includes an information receiving unit, a signal processing unit, a control unit, and a simulated sound source unit. It can receive the operation information of the electric drive assembly and the vehicle driving information, confirm the need to match the simulated sound source through analysis and calculation, and transmit the simulated sound source information to the speaker. The speaker transmits the amplified sound of the simulated sound source to the electric drive assembly, so that the sound of the simulated sound source is mixed with the sound of the electric drive assembly and transmitted into the vehicle interior.

[0022] The information receiving unit of the data processing module is connected to the electric drive assembly controller and the vehicle controller, mainly to obtain the vehicle information of the whole vehicle and the electric drive assembly information.

[0023] Among them, the vehicle information is obtained from the vehicle controller, including but not limited to vehicle speed, driving mode, gear position, fan, and vehicle interior instrument panel platform information. The electric motor assembly information is obtained from the electric drive assembly controller, including but not limited to motor speed, torque, and power information.

[0024] The simulated sound source unit formulates a matching sound source according to the vehicle information and the state of the electric motor assembly information.

[0025] In some other embodiments, the information receiving unit is also connected to the vehicle central control to obtain entertainment configuration information of the vehicle such as air conditioning, audio, and playback functions.

[0026] The speaker transmits the sound to the electric drive assembly through the sound amplification shell, mixing the sound generated by the speaker and the howling generated by the electric drive assembly itself.

[0027] One or more speakers can be installed. Before installation, it is necessary to determine a suitable installation position. The selection of the speaker installation position is mainly designed considering the following three elements.

[0028] First, the main noise propagation path from the electric drive assembly to the vehicle interior is through the front enclosure of the engine compartment. Therefore, the speaker is mainly installed on the front enclosure of the engine compartment.

[0029] Second, the vehicle conducts noise transfer analysis (NVF) at different positions to confirm the position where the sound is most easily transmitted into the vehicle interior.

[0030] Third, combined with the noise analysis of the powertrain, the position points where the assembly is prone to generate howling are considered.

[0031] The outer edge of the sound amplification shell is designed at a certain angle. The main goal is to make the sound emitted by the speaker all aim at the electric drive assembly, better transmit the sound of the speaker to the whole vehicle, and ensure that the sound emitted by the speaker is integrated with the electric drive assembly.

[0032] The sound amplification shell of this embodiment has the characteristics of simple structure, convenient processing, and low cost.

[0033] In the prior art, in order to reduce order howling and meet the design indicators of NVH, it is necessary to sacrifice some related performances when designing the electric drive assembly. The present invention designs an acceleration sound system for an electric vehicle. By superimposing an artificial sound source on the order howling noise, the howling noise generated by the electric drive assembly is interfered with and weakened, and the abruptness of the howling noise is reduced. Compared with simply playing a sound effect to cover up the howling noise, matching a suitable artificial sound source with the howling noise to form a new synthetic sound can not only eliminate the bad perception of the noise by the passengers in the vehicle, but also get rid of the design dilemma of sacrificing performance due to the noise of the electric drive assembly, and improve the performance of the electric vehicle.

[0034] Embodiment 2 This embodiment provides a configuration method for an acceleration sound system of an electric vehicle, which is applicable to the above-mentioned acceleration sound system of an electric vehicle. The flowchart is referred to Figure 2 and mainly includes the following steps.

[0035] Step S1: Collect the sound data of the electric drive assembly under different driving conditions to obtain the sound spectra of the electric drive assembly under different conditions.

[0036] In this embodiment, first, collect the noise information of the electric drive assembly under different conditions. Different conditions may include no load, 10% load, 25% load, 50% load, 75% load, 100% load under the acceleration condition, the rotational speed from the lowest rotational speed to the highest rotational speed, -10% load, -25% load, -50% load, 75% load, -100% load under the deceleration condition, the rotational speed from the highest rotational speed to the lowest rotational speed. The microphones are arranged 1m above the upper end face, 1m in front of the front end face, 1m behind the rear end face, 1m on the left end face, and 1m on the right end face of the electric drive assembly.

[0037] Collect the sound spectral characteristics of the electric drive assembly under each condition, and pay attention to the relatively prominent order characteristics.

[0038] For the collection of vehicle data, it is required to collect the acceleration condition, gently stepping on the driving pedal opening, moderately stepping on the driving pedal opening, and heavily stepping on the driving pedal opening. For the deceleration condition collection, high-energy recovery, medium-energy recovery, and low-energy recovery.

[0039] Step S2: Analyze the sound spectra of the electric drive assembly under different conditions, and superimpose the artificial sound source spectrum to eliminate abnormal sounds, thereby forming an artificial sound source database.

[0040] In this embodiment, organize the sound spectra of the vehicle sound collected in the vehicle and the sound spectra of the powertrain collected during the assembly drive, and analyze and confirm the spectral characteristics that have an impact on the vehicle interior.

[0041] After confirming the influential order spectra, formulate corresponding artificial sound sources to weaken the influence of order howling on the vehicle interior.

[0042] Specifically, first, analyze the sound spectra of the electric drive assembly under different driving conditions one by one, and match the optimal artificial sound source spectra for the sound spectra of the electric drive assembly under different driving conditions; then, obtain a number of artificial sound sources according to the optimal artificial sound source spectra; finally, store a number of artificial sound sources and the corresponding driving condition data to form an artificial sound source database.

[0043] In this embodiment, according to the conventional drivability of the vehicle, 3 acceleration and 3 deceleration artificial sound sources are respectively configured, and the condition information corresponding to each artificial sound source is elaborated in detail below.

[0044] For the first acceleration condition, 25% load acceleration, that is, gently step on the drive pedal, and formulate artificial sound source 1 according to the spectrum obtained by collecting the noise of the first acceleration condition.

[0045] In this embodiment, the artificial sound source matched with the 25% load acceleration condition can not only weaken the howling of the electric drive assembly, but also add a source spectrum feature with a soft and recognizable proportion, so that the synthesized sound is not simply white noise but more vivid, increasing the driving comfort.

[0046] In some other embodiments, the synthesized sound can also be pure white noise to eliminate howling, or it can have other spectrum features.

[0047] For the second acceleration condition, 50% load acceleration, that is, moderately step on the drive pedal, and formulate artificial sound source 2 according to the spectrum obtained by collecting the noise of the second acceleration condition.

[0048] The artificial sound source matched with the 50% load acceleration condition can not only weaken the howling of the electric drive assembly, but also add a relatively saturated source spectrum feature, which can attract the attention of the people in the vehicle and reduce boredom.

[0049] For the third acceleration condition, 100% load acceleration, that is, heavily step on the drive pedal, and formulate artificial sound source 3 according to the spectrum obtained by collecting the noise of the first acceleration condition.

[0050] The artificial sound source matched with the 100% load acceleration condition can not only weaken the howling of the electric drive assembly, but also add a strong source spectrum feature similar to the strong acceleration feeling of a sports car, giving people a strong sense of power when driving.

[0051] Through the synthesis of acceleration sounds matching the actual dynamics, not only can the howling noise be eliminated, but also the people in the vehicle can be promoted to obtain a cognition matching the actual dynamics, and thus it is not easy for the people in the vehicle to get carsick.

[0052] For the first deceleration condition, low energy recovery, formulate artificial sound source 4 according to the vehicle sound and the sound spectra of the power assembly obtained by collecting the noise of the first deceleration condition.

[0053] For the second deceleration condition with medium energy recovery, the artificial sound source 5 is formulated based on the vehicle sound and the sound spectrum of the powertrain obtained by collecting the noise of the second deceleration condition.

[0054] For the third deceleration condition with high energy recovery, the artificial sound source 6 is formulated based on the vehicle sound and the sound spectrum of the powertrain obtained by collecting the noise of the third deceleration condition.

[0055] It can be understood that the three deceleration conditions can also match the corresponding artificial sound source spectrum characteristics according to the spectrum characteristics.

[0056] Matching the optimal artificial sound source spectrum includes making the mixed sound formed by mixing the sound of the electric drive assembly and the sound of the artificial sound source can weaken or eliminate the abnormal sound generated by the electric drive assembly, and also making the spectrum of the mixed sound formed by mixing the sound of the electric drive assembly and the sound of the artificial sound source have a regular change, such as making the mixed sound approach white noise or pink noise.

[0057] It should be noted that this embodiment only provides a classification method for driving conditions. According to this classification method, six artificial sound sources are formulated. In actual applications, those skilled in the art can make a more detailed division of the driving conditions, so as to formulate a richer artificial sound source database to cope with the different noises of various driving conditions.

[0058] In some other embodiments, different acceleration modes can be considered during collection, including but not limited to the sports mode and the comfort mode, or the influence of the air conditioner and the fan can be considered, such as the air conditioner being in the on state and the air conditioner being in the off state, or different wind levels of the fan being on. The various influence indicators are combined to obtain the classification result of the driving conditions.

[0059] After configuring the artificial sound source, the artificial sound source can be matched and played according to the driving conditions during driving.

[0060] Step S3: Receive the operation information of the electric drive assembly and the driving information of the vehicle, and analyze to obtain the driving conditions.

[0061] In this embodiment, the data processing module obtains the driving information of the current electric vehicle in real time, analyzes according to the driving information, and matches the driving conditions stored in the artificial sound source database.

[0062] Step S4: Match the artificial sound source from the artificial sound source database according to the driving conditions, and play the sound of the artificial sound source.

[0063] Judge whether the current driving condition is in the artificial sound source database. If not, re-collect the noise of the current driving condition. If so, perform artificial sound source matching.

[0064] The data processing module confirms the driving conditions of the whole vehicle based on the received driving information of the whole vehicle, identifies the corresponding artificial sound source data for matching, and feeds the matched artificial sound source back to the microphone for playback.

[0065] In some other embodiments, the artificial sound source matched by the data processing module also needs to consider the low-speed warning sound in the vehicle and the influence of the audio console playback.

[0066] When the low-speed warning sounds during the driving of the whole vehicle or when music or video programs are being played in the vehicle, the background noise in the vehicle is already very loud. At this time, the data processing module can reduce or turn off the playback sound of the artificial sound source after connecting to the vehicle processor and identifying the relevant information.

[0067] While reducing the noise of the electric drive assembly, the artificial sound source design needs to synthesize wonderful sounds to provide a better driving experience for the vehicle occupants.

[0068] In the prior art, in order to reduce order howling and meet the NVH design indicators, it is necessary to sacrifice some related performances when designing the electric drive assembly. The present invention designs an acceleration sound system for electric vehicles. By superimposing the artificial sound source and the order howling noise, the howling noise generated by the electric drive assembly is interfered and weakened, and the abruptness of the howling noise is reduced. Compared with simply playing a kind of sound effect to cover up the howling noise, matching a suitable artificial sound source with the howling noise to form a new synthesized sound can not only eliminate the bad perception of the noise by the vehicle occupants, but also get rid of the design dilemma of sacrificing performance due to the noise of the electric drive assembly, and improve the performance of electric vehicles.

[0069] Embodiment 3 This embodiment provides a configuration method for an acceleration sound system of an electric vehicle. Referring to the above acceleration sound system of an electric vehicle, it mainly includes the following several steps.

[0070] Step S1, collect the sound data of the electric drive assembly under different driving conditions to obtain the sound spectrum of the electric drive assembly under different conditions.

[0071] In this embodiment, first collect the noise information of the electric drive assembly under different conditions. According to the load, speed and fan, it specifically includes the following several conditions.

[0072] Under acceleration and deceleration conditions, when the load is 0 - 20%, 20% - 40%, 40% - 60%, 60% - 80%, 80% - 100% respectively, and the rotational speed is 0 - 20%, 20% - 40%, 40% - 60%, 60% - 80%, 80% - 100% of the maximum rotational speed respectively, when the microphone is arranged at 1 m on the upper end face, 1 m on the front end face, 1 m on the rear end face, 1 m on the left end face, and 1 m on the right end face of the electric drive assembly, with the fan on and off, the air conditioner on and off, and the driving mode being sports mode, comfort mode, and economy mode, the noise information under 1500 different working conditions is collected. According to the noise information, the sound spectra of the electric drive assembly under each working condition are obtained, with 3000 kinds at the vehicle interior and 3000 kinds at the drive of the assembly, totaling 6000 kinds.

[0073] Step S2: Analyze the sound spectra of the electric drive assembly under different working conditions, superimpose the spectra of the simulated sound sources to eliminate abnormal noises, and form a simulated sound source database.

[0074] In this embodiment, the sound spectra of the vehicle interior sound collected and the sound spectra of the powertrain collected at the drive of the assembly are sorted out, and the spectral characteristics that affect the vehicle interior are analyzed and confirmed.

[0075] After confirming the influential order spectra, corresponding simulated sound sources are formulated to weaken the influence of order whistles on the vehicle interior.

[0076] For the specific process of step S2, it includes the following several sub - steps.

[0077] Step S21: First, mark the spectra obtained from the noise collected at the vehicle interior and at the drive of the assembly as a group, obtaining 3000 different spectra. Analyze the spectral characteristic curves of each group to confirm the order spectra that affect the vehicle interior.

[0078] Analyze the sound spectra of the electric drive assembly under different driving conditions group by group, and match the optimal simulated sound source spectrum for each group of spectra, so that the abrupt order characteristics can be eliminated in the sound spectrum obtained by mixing the noise and the simulated sound source.

[0079] Step S22: Then, based on the 3000 optimal simulated sound source spectra, 3000 simulated sound sources are obtained.

[0080] Step S23: Finally, store these 3000 simulated sound sources and the corresponding driving condition data to form a simulated sound source database.

[0081] In this embodiment, some spectral characteristics can also be added to each optimal simulated sound source spectrum.

[0082] For example, for the working conditions with acceleration and loads of 0 - 20% and 20% - 40%, add a source spectrum feature with a gentle proportion and recognizable characteristics to the simulated source spectrum corresponding to the noise spectrum; for the working conditions with acceleration and loads of 40% - 60% and 60% - 80%, add a relatively saturated source spectrum feature to the simulated source spectrum corresponding to the noise spectrum; for the working conditions with acceleration and loads of 80% - 100%, add a strong source spectrum feature to the simulated source spectrum corresponding to the noise spectrum, giving people a strong sense of power when driving.

[0083] Similarly, for the three deceleration working conditions, corresponding simulated source spectrum features can also be matched according to the spectrum characteristics.

[0084] Through the synthesis of acceleration sounds that match the actual dynamic feeling, not only can the whistling noise be eliminated, but it can also help the passengers in the vehicle obtain a cognition that matches the actual dynamic feeling, and thus make it less likely for the passengers in the vehicle to get carsick.

[0085] The optimal matching of the simulated source spectrum includes making the mixed sound formed by mixing the sound of the electric drive assembly and the sound of the simulated source can weaken or eliminate the abnormal sound generated by the electric drive assembly, and also making the spectrum of the mixed sound formed by mixing the sound of the electric drive assembly and the sound of the simulated source have regular changes, such as making the mixed sound approach white noise or pink noise.

[0086] It should be noted that this embodiment only provides a classification method for driving conditions. According to this classification method, six simulated sources are formulated. In actual applications, those skilled in the art can make a more detailed division of the driving conditions, so as to formulate a richer simulated source database to cope with the different noises of various driving conditions.

[0087] In some other embodiments, different acceleration modes can be considered during acquisition, including but not limited to the sports mode and the comfort mode, or the influence of the air conditioner and the fan can be considered, such as the air conditioner being in the on state and the air conditioner being in the off state, or different wind levels when the fan is on. Combine each influence index to obtain the classification result of the driving conditions.

[0088] After configuring the simulated source, it can be played by matching the simulated source according to the driving conditions during driving.

[0089] Step S3, receive the operation information of the electric drive assembly and the driving information of the whole vehicle, and analyze to obtain the driving conditions.

[0090] In this embodiment, the data processing module continuously obtains the driving information of the current electric vehicle, analyzes according to the driving information, and matches the driving conditions stored in the simulated source database.

[0091] Step S4, match the simulated source from the simulated source database according to the driving conditions, and play the sound of the simulated source.

[0092] The data processing module confirms the driving conditions of the whole vehicle by receiving the driving information of the whole vehicle, identifies the corresponding artificial sound source data for matching, and feeds the matched artificial sound source back to the microphone for playback.

[0093] In some other embodiments, the artificial sound source matched by the data processing module also needs to consider the low-speed warning sound in the vehicle and the influence of the voice console playback.

[0094] When the low-speed warning sounds during the driving of the whole vehicle or when a music or video program is being played in the vehicle, the background noise inside the vehicle is already very loud. At this time, the data processing module can reduce or turn off the playback sound of the artificial sound source after identifying relevant information by connecting to the vehicle processor.

[0095] While reducing the noise of the electric drive assembly, the artificial sound source design needs to synthesize wonderful sounds to provide a better driving experience for the passengers in the vehicle.

[0096] In the prior art, in order to reduce the order howling and meet the NVH design indicators, it is necessary to sacrifice some related performances when designing the electric drive assembly. The present invention designs an acceleration sound system for electric vehicles. By superimposing the artificial sound source on the order howling noise, the howling noise generated by the electric drive assembly is interfered with and weakened, and the abruptness of the howling noise is reduced. Compared with simply playing a kind of sound effect to cover up the howling noise, matching a suitable artificial sound source with the howling noise to form a new synthesized sound can not only eliminate the bad perception of the noise by the passengers in the vehicle, but also get rid of the design dilemma of sacrificing performance due to the noise of the electric drive assembly, and improve the performance of electric vehicles.

[0097] Embodiment 4 This embodiment provides a storage medium on which a corresponding computer program is stored. When the computer program is executed by a processor, it can implement the configuration method of an acceleration sound system for an electric vehicle as described above. In this embodiment, when the computer program runs, it can execute the content of the above method.

Claims

1. An electric vehicle acceleration sound system, characterized in that: It includes a data processing module connected to a speaker, which obtains the driving condition of the whole vehicle and matches the simulated sound source; the speaker receives the simulated sound source data fed back by the data processing module, transmits it to the electric drive assembly controller, and plays the sound of the simulated sound source; the speaker is connected to a sound amplification shell, which merges the sound played by the speaker with the noise of the electric drive assembly.

2. The electric vehicle acceleration sound system according to claim 1, characterized in that: The data processing module includes an information receiving unit, which receives the operation information of the electric drive assembly and the driving information of the whole vehicle to obtain the driving condition of the whole vehicle; the information receiving unit is connected to a signal processing unit, which identifies the simulated sound source data and matches the simulated sound source according to the driving condition of the whole vehicle.

3. The electric vehicle acceleration sound system according to claim 2, characterized in that: The signal processing unit is connected to a control unit, which receives the simulated sound source data of the signal processing unit and controls the speaker to play the sound of the simulated sound source. The output end of the control unit is connected to the speaker, and the input end of the control unit is connected to the simulated sound source unit. The simulated sound source unit stores the vehicle driving conditions and the corresponding simulated sound source data.

4. The electric vehicle acceleration sound system according to claim 1, characterized in that: The sound expansion shell is provided with a horn-shaped shell, one end of the shell is connected to a ring-shaped speaker interface, and the other end of the shell is connected to an arc-shaped sound reflection plate extending outward along a section of the outer contour of the shell.

5. An electric vehicle acceleration sound system according to any one of claims 1 to 4, characterized in that: The sound of the simulated sound source is merged with the noise of the electric drive assembly to eliminate the noise of the electric drive assembly.

6. The electric vehicle acceleration sound system according to claim 2, characterized in that: The information receiving unit is connected to the electric drive assembly controller and the vehicle controller.

7. A method for configuring an electric vehicle acceleration sound system, characterized in that: An electric vehicle acceleration sound system applicable to any one of claims 1 to 6, comprising: S1, collecting sound data of the electric drive assembly under different driving conditions to obtain the sound spectrum of the electric drive assembly under different working conditions; S2, analyzing the sound spectra of the electric drive assembly under different working conditions, superimposing the simulated sound source spectra to eliminate abnormal noise, and forming a simulated sound source database; S3, receiving the electric drive assembly operation information and the vehicle driving information, and analyzing and obtaining the driving condition; S4, matching the simulated sound source from the simulated sound source database according to the driving condition, and playing the sound of the simulated sound source.

8. The method for configuring an electric vehicle acceleration sound system according to claim 7, characterized in that: The step S2 comprises: S21, analyzing the sound spectra of the electric drive assembly under different driving conditions one by one, and matching the sound spectra of the electric drive assembly under different driving conditions with the optimal simulated sound source spectrum; S22, obtaining a plurality of simulated sound sources according to the optimal simulated sound source spectrum; S23, storing a plurality of simulated sound sources and corresponding driving condition data to obtain a simulated sound source database.

9. The method for configuring an electric vehicle acceleration sound system according to claim 7 or 8, characterized in that: The superimposed simulated sound source spectrum includes a mixed sound formed by mixing the sound of the electric drive assembly with the sound of the simulated sound source, which can weaken or eliminate the abnormal sound generated by the electric drive assembly.

10. The method for configuring an electric vehicle acceleration sound system according to claim 7 or 8, characterized in that: The superimposing of the simulated sound source spectrum includes making the spectrum of the mixed sound formed by mixing the sound of the electric drive assembly and the sound of the simulated sound source have regular changes.

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