WO2022061709A1

WO2022061709A1 - Electric vehicle sound effect simulation method, device, and system, and automobile

Info

Publication number: WO2022061709A1
Application number: PCT/CN2020/117733
Authority: WO
Inventors: 汤晓林; 何睦; 邬广铭
Original assignee: 武汉路特斯汽车有限公司
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2022-03-31
Also published as: CN115803225A

Abstract

An electric vehicle sound effect simulation method, device, and system, and an automobile. The method comprises: acquiring vibration information, electric drive rotational speed information, and vehicle condition information of a vehicle; determining an order set according to the vibration information and the electric drive rotational speed information, the order set comprising at least one order; each order corresponding to one sound signal; performing compensation processing on each order in the order set to obtain a compensation audio corresponding to each order; synthesizing the obtained compensation audios to obtain a target compensation audio; and playing back the target compensation audio. The problem that the electric vehicle sound effect cannot reflect the electric driving force characteristic in real time when the passenger drives the electric vehicle is solved.

Description

An electric vehicle sound effect simulation method, device, system and vehicle

technical field

The present invention relates to an electrical system of an electric vehicle, in particular to a sound effect simulation method, device, system and automobile of an electric vehicle.

Background technique

Under different driving conditions of electric vehicles, there are different sounds of motor reducers in the vehicle. Since different electric vehicles have different system resonance characteristics, there is no linear relationship between the electric drive sound under different motion conditions, the opening and closing degree of the accelerator pedal and the speed of the vehicle. Speed feedback, lack of driving pleasure. In the prior art, according to the characteristics of low sound of electric vehicles, the sound of the traditional engine is actively added in the car to form a feedback of the sound to the accelerator pedal, so as to increase the driving experience; or by playing the audio files recorded in advance, according to different vehicles The sound of the electric vehicle sound compensation method usually cannot reflect the electric drive sound characteristics of the electric vehicle.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a sound effect simulation method, device, system and automobile of an electric vehicle, so as to solve the problem that the sound effect of the existing electric vehicle cannot reflect the dynamic characteristics of the electric vehicle.

In order to solve the above technical problem, an embodiment of the present invention discloses a method for simulating sound effects of an electric vehicle. The method includes: acquiring vibration information, electric drive speed information and vehicle condition information of a vehicle; according to the vibration information and the electric drive speed The information determines an order set, the order set includes at least one order, and each order corresponds to a sound signal; compensation processing is performed on each order in the order set to obtain the compensation corresponding to each order audio; synthesizing the obtained compensation audio to obtain target compensation audio; playing the target compensation audio; wherein, performing compensation processing on the order includes: determining a target pitch value; The first sound signal is determined from the sound signal corresponding to the order; the second sound signal is determined from the first sound signal according to the sound pressure value of each order, and the second sound signal is the sound signal that needs to be compensated; according to The vehicle condition information compensates the second sound signal to obtain a compensation audio corresponding to the order.

Further, determining the order set according to the vibration information and the electric drive rotational speed information includes: determining a vibration frequency domain signal according to the vibration information, and determining an electric drive rotational speed signal according to the electric drive rotational speed information; The vibration frequency domain signal and the electric drive rotational speed signal determine a target order set.

Further, the determining of the target pitch value includes: obtaining a preset pitch value; and obtaining the target pitch value according to the pitch value corresponding to the order and the preset pitch value.

Further, the acquiring the preset tone value includes: determining a reference tone value according to the tone value of the background noise in the vehicle; and using the reference tone value as the preset tone value.

Further, the obtaining the target pitch value according to the pitch value corresponding to the order and the preset pitch value includes: obtaining a first evaluation pitch value; determining the first evaluation pitch value according to the first evaluation pitch value and the preset pitch value. The second evaluation pitch value; the pitch value whose pitch value corresponding to the order is smaller than the second evaluation pitch value is determined as the target pitch value.

Further, the determining the first sound signal from the sound signal corresponding to the order according to the target pitch value includes: determining the sound signal corresponding to the target pitch value; The sound signal is determined as the first sound signal.

Further, the determining the second sound signal from the first sound signal according to the sound pressure values of each order includes: extracting the features of the sound pressure values of each order in the first sound signal; The characteristics of determine the second sound signal.

Further, the vehicle condition information includes accelerator pedal opening, brake pedal opening or motor torque information.

Further, the compensating the second sound signal according to the vehicle condition information includes: determining a compensation coefficient according to the accelerator pedal opening, the brake pedal opening or the motor torque information; The coefficients compensate the second sound signal.

Further, before the step of synthesizing the obtained compensation audio to obtain the target compensation audio, the step further includes: determining an order compensation signal related to the rotation speed corresponding to the order, wherein the rotation speed corresponding to the order is related to the order. The order compensation signal of the electric drive is determined according to the electric drive rotational speed signal; the compensation audio frequency corresponding to the order is determined according to the order compensation signal related to the rotational speed.

Further, after the step of playing the target compensation audio, the method further includes: collecting in-vehicle sound; and adjusting the target compensation audio according to the in-vehicle sound.

Further, adjusting the target compensation audio according to the in-vehicle sound includes: acquiring the in-vehicle sound feature; obtaining a sound data analysis result according to the in-vehicle sound feature; adjusting according to the sound data analysis result The target compensates audio.

The embodiment of the present invention also provides an electric vehicle sound effect simulation device, which includes a signal acquisition module, an identification analysis module, a compensation sound processing module, a compensation sound generation module and a compensation realization module, and the signal acquisition module is used to obtain the vibration information of the vehicle , electric drive speed information and vehicle condition information; the identification and analysis module is used to determine an order set according to the vibration information and the electric drive speed information, the order set includes at least one order, and each order corresponds to one a sound signal; the compensated sound processing module is configured to perform compensation processing on each order in the order set to obtain compensated audio corresponding to each order; wherein performing compensation processing on the orders includes: determining the target pitch value; the first sound signal is determined from the sound signal corresponding to the order according to the target pitch value; the second sound signal is determined from the first sound signal according to the sound pressure value of each order, the first sound signal is The second sound signal is the sound signal that needs to be compensated; the sound compensation is performed on the second sound signal according to the vehicle condition information to obtain the compensation audio corresponding to the order; the compensation sound generation module is used for each obtained sound signal. The compensation audio is synthesized to obtain the target compensation audio; the compensation realization module is used for playing the target compensation audio.

Further, the compensation sound processing module also includes a target definition module and a compensation calculation module, the target definition module is used to determine a target pitch value; the compensation calculation module is used to determine the target pitch value from the corresponding order of The first sound signal is determined from the sound signal; the second sound signal is determined from the first sound signal according to the sound pressure value of each order, and the second sound signal is the sound signal that needs to be compensated; according to the vehicle condition information Perform sound compensation on the second sound signal to obtain the compensation audio corresponding to the order.

An embodiment of the present invention further provides an electric vehicle sound effect simulation system, including an audio collection device, an audio playback device, and the electric vehicle sound effect simulation device according to any one of the claims, wherein the electric vehicle sound effect simulation device is respectively connected with the audio The acquisition device is connected with the audio playback device.

An embodiment of the present invention also provides an automobile, the automobile is configured with the electric vehicle sound effect simulation system as described above.

Implement the present invention, have the following beneficial effects:

In the present invention, an order set is determined according to the vibration information and the electric drive speed information, and the order set is related to the setting of the electric drive, so that the order set obtained according to the vibration information and the electric drive speed information can reflect the electric drive The order collection of the sound characteristics of the electric vehicle drive, the present invention obtains the compensation audio corresponding to each order by performing compensation processing on each order in the order collection; and filters the sound signal by setting the target pitch value , obtain the first sound signal that satisfies the screening conditions, and then obtain the second sound signal that needs to be compensated from the first sound signal according to the sound pressure value. The compensated signal is set according to the characteristics of the sound of the electric drive of the electric vehicle; by synthesizing the obtained compensation audio, the target compensation audio is obtained; by playing the target compensation audio, the sound effect reflecting the sound characteristics of the electric drive of the electric vehicle is obtained, Improve the driving experience of drivers and passengers.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following briefly introduces the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic flowchart of a method for simulating sound effects of an electric vehicle according to an embodiment of the present invention.

2 is a schematic flowchart of determining an order set according to vibration information and electric drive rotational speed information according to an embodiment of the present invention.

FIG. 3 is a schematic flowchart of determining a target pitch value according to an embodiment of the present invention.

FIG. 4 is a schematic flowchart of obtaining a preset pitch value according to an embodiment of the present invention.

FIG. 5 is a schematic flowchart of obtaining a target pitch value according to a pitch value corresponding to an order and a preset pitch value according to an embodiment of the present invention.

6 is a schematic flowchart of determining a first sound signal from a sound signal corresponding to an order according to a target pitch value according to an embodiment of the present invention.

7 is a schematic flowchart of determining a second sound signal from a first sound signal according to sound pressure values of various orders according to an embodiment of the present invention.

FIG. 8 is a schematic flowchart of compensation for a second sound signal according to vehicle condition information according to an embodiment of the present invention.

FIG. 9 is a schematic flowchart of determining a compensation audio corresponding to an order according to an embodiment of the present invention.

FIG. 10 is a schematic flowchart of adjusting target compensation audio according to in-vehicle sound according to an embodiment of the present invention.

FIG. 11 is a schematic structural diagram of an electric vehicle sound effect simulation device according to an embodiment of the present invention.

FIG. 12 is a schematic structural diagram of a compensated sound processing module provided by an embodiment of the present invention.

FIG. 13 is a schematic structural diagram of an electric vehicle sound effect simulation system according to an embodiment of the present invention.

Among them, the reference numerals in the figure correspond to: 600-electric vehicle sound effect simulation device, 610-signal acquisition module, 620-recognition analysis module, 630-compensation sound processing module, 631-target definition module, 632-compensation calculation module, 640 -Compensation sound generation module, 650-Compensation realization module, 700-Electric vehicle sound effect simulation system, 710-Audio collection equipment, 720-Audio playback equipment.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments 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.

In the following description, for the sake of clarity and conciseness, all the various components shown in the drawings are not described, which are shown in the drawings to provide those of ordinary skill in the art with fully achievable implementations of the present invention. public content. The operation of many components will be familiar and obvious to those skilled in the art.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features, thereby defining "first", "" The "second" feature may explicitly or implicitly include one or more of the stated features, and in the description of the present invention, "multiple" means two or more, unless otherwise explicitly and specifically defined.

The method for simulating sound effects of an electric vehicle provided in this embodiment is used for simulating the sound effects of an electric vehicle under different driving conditions. As shown in FIG. 1 , the method includes the following steps.

Step 100: Obtain the vibration information, electric drive speed information and vehicle condition information of the vehicle.

In this step, the vibration information of the vehicle is one or more of the vibration information of the motor, the motor drive system or the housing of the motor drive system, and the vibration information of the vehicle is the vibration information reflecting the vibration characteristics of the motor drive system itself, The acquisition of the vibration information of the vehicle can be based on the configuration of the motor drive system of different electric vehicles to obtain the vibration information of different motor drive system components that can reflect the vibration characteristics of the motor drive system itself. The rotational speed information of the electric drive may be rotational speed information of the motor, rotational speed information of the wheel, or rotational speed information of the transmission device disposed between the motor and the wheel. The vehicle condition information includes one or more of the opening and closing information of the accelerator pedal, the opening and closing information of the brake pedal, or the motor torque information, and the driving information of the vehicle is used to reflect the working conditions of the vehicle. It also includes other information that can reflect the working conditions of the vehicle, which is not limited in the present invention.

Step 200: Determine an order set according to the vibration information and the electric drive rotational speed information, where the order set includes at least one order, and each order corresponds to a sound signal.

In this step, the vibration information and the electric drive rotational speed information are compared to obtain an order that can reflect the vibration characteristics of the motor drive system, and the order set is determined according to the order that can reflect the vibration characteristics of the motor drive system.

Step 300: Perform compensation processing on each order in the order set to obtain compensation audio corresponding to each order, wherein performing compensation processing on the order includes:

Determine the target pitch value;

Determine the first sound signal from the sound signal corresponding to the order according to the target pitch value;

Determine a second sound signal from the first sound signal according to the sound pressure value of each order, and the second sound signal is a sound signal that needs to be compensated;

The second sound signal is compensated according to the vehicle condition information to obtain the compensated audio corresponding to the order.

In this step, the sound signal is screened by setting the target pitch value to obtain a first sound signal that satisfies the screening conditions, and then the second sound signal that needs to be compensated is obtained from the first sound signal according to the sound pressure value, and the target pitch value And the setting of screening according to the sound pressure value ensures that the signal that needs sound compensation is determined according to the characteristics of the electric drive sound of the electric vehicle, thereby ensuring that the compensated audio can reflect the sound characteristics of the electric vehicle.

Step 400: Synthesize the obtained compensation audio to obtain the target compensation audio.

Step 500: Play the target compensation audio.

In this step, the target compensation audio is played, and the target compensation audio is superimposed with the existing electric drive sound to realize the continuity of the electric drive sound of the electric vehicle and ensure the quality of the electric drive sound of the electric vehicle.

The present invention determines an order set according to the vibration information and the electric drive speed information, and the order set is related to the setting of the electric vehicle motor drive system, and the order set obtained according to the vibration information and the electric drive speed information is: The set of orders that can reflect the sound characteristics of the electric drive of the electric vehicle, the present invention ensures that the signal that needs to be compensated for the sound is set according to the characteristics of the sound of the electric drive of the electric vehicle through the setting of the target pitch value and the screening according to the sound pressure value; The obtained compensation audio is synthesized to obtain the target compensation audio; by playing the target compensation audio, the sound effect reflecting the sound characteristics of the electric drive of the electric vehicle is obtained, and the driving experience of the driver and passenger is improved.

In an embodiment of the present invention, in the step of determining the order set according to the vibration information and the electric drive rotational speed information, as shown in FIG. 2 , the following steps are further included:

Step 201: Determine a vibration frequency domain signal according to the vibration information, and determine an electric drive rotation speed signal according to the electric drive rotation speed information.

Step 202: Determine a target order set according to the vibration frequency domain signal and the electric drive rotational speed signal.

In an embodiment of the present invention, in the step of determining the target pitch value, as shown in FIG. 3 , the following steps are further included:

Step 311: Acquire a preset tone value.

In this step, the preset tone value may be determined according to the tone value of ambient noise.

Step 312: Obtain a target pitch value according to the pitch value corresponding to the order and the preset pitch value.

In this step, based on the reference standard of the preset pitch value, the pitch value corresponding to the order higher than the preset pitch value and satisfying the predetermined condition is determined as the target pitch value.

In an embodiment of the present invention, in the step of acquiring the preset pitch value, as shown in FIG. 4 , the following steps are further included:

Step 3111: Determine the reference pitch value according to the pitch value of the background noise in the vehicle.

In this step, the pitch value of the background noise in the vehicle is obtained by collecting the background noise in the vehicle.

Step 3112: Use the reference pitch value as a preset pitch value.

In this step, the pitch value of the background noise in the vehicle is directly used as the preset pitch value, so as to perform subsequent processing on the pitch value corresponding to the order on the basis of the pitch value, and the preset pitch value is based on the in-vehicle pitch value. The dynamic size of the background noise is continuously adjusted, and the calculation of the target pitch value can more accurately reflect the prominence of the pitch, so that the subsequent simulation of the sound effects of the electric vehicle is more in line with the human ear's perception of the pitch sound.

In an embodiment of the present invention, the step of obtaining the target pitch value according to the pitch value corresponding to the order and the preset pitch value, as shown in FIG. 5 , further includes the following steps:

Step 3121: Obtain the first evaluation pitch value.

In this step, the first evaluation tone value may be determined according to preset sound effects of different vehicle models, or may be determined according to methods of objective spectrum analysis and subjective audition, or may be set according to different sound field environments.

Step 3122: Determine a second evaluation pitch value according to the first evaluation pitch value and the preset pitch value.

In this step, the first evaluation pitch value and the preset pitch value are added to obtain a second evaluation pitch value. Or set different weighting values for the first evaluation pitch value and the preset pitch value and add them to control the first evaluation pitch value and the preset pitch value in the second evaluation pitch. The proportion in the value, thereby adjusting the influence of the first evaluation pitch value and the preset pitch value on the determination of the target pitch value. The second evaluation tone value is in the reference background of the preset tone value, which can determine the tone value of whistling in the vehicle, and the setting of the second evaluation tone value enables the vehicle to be determined with reference to the second evaluation tone value. The sound of internal whistling is adjusted to obtain a good sound effect simulation effect of electric vehicles.

Step 3123: Determine the pitch value whose pitch value corresponding to the order is smaller than the second evaluation pitch value as the target pitch value.

In this step, a pitch value smaller than the second evaluation pitch value is determined as a target pitch value, and subsequent processing is performed with a pitch value corresponding to the order that is smaller than the second evaluation pitch value, wherein The sound signal corresponding to the pitch value of the second evaluation pitch value corresponds to the in-vehicle whistling sound that does not meet the conditions, and the electric vehicle sound effect simulation method of the present invention is adjusted for the above-mentioned in-vehicle whistling sound that does not meet the conditions. In order to obtain a good sound simulation effect of electric vehicles, and improve the driving experience of drivers and passengers.

In an embodiment of the present invention, the step of determining the first sound signal from the sound signal corresponding to the order according to the target pitch value, as shown in FIG. 6 , further includes the following steps:

Step 321: Determine the sound signal corresponding to the target pitch value.

Step 322: Determine the sound signal corresponding to the target pitch value as the first sound signal.

In this step, the sound signal corresponding to the target pitch value is determined as the first sound signal, so as to process the first sound signal.

In an embodiment of the present invention, in the step of determining the second sound signal from the first sound signal according to the sound pressure values of various orders, as shown in FIG. 7 , the following steps are further included:

Step 331 : Extract the features of the sound pressure values of each order in the first sound signal.

Step 332: Determine the second sound signal according to the characteristics of the sound pressure values of each order.

In this step, the first sound signal whose sound pressure value characteristic of each order satisfies a certain condition is determined as the second sound signal. The preset conditions may include the following situations: for example, when the difference between the first sound signal and the preset pitch value is discontinuous, it will cause the human ear to perceive the difference between the first sound signal and the preset pitch value. If the perception of the in-vehicle whistling sound represented cannot match the running state of the electric vehicle, the first sound signal satisfying this condition is determined as the second sound signal; or, for example, when the difference between the first sound signal and the preset tone value is When the value cannot change linearly with the change of vehicle condition information, thus affecting the human ear's perception of the car whistling sound represented by the difference between the first sound signal and the preset tone value, this situation makes the human ear perceive the car whistling sound. If the perception of sound cannot change with the change of vehicle condition information and affect the driving experience, the first sound signal satisfying this condition is determined as the second sound signal; The first sound signal corresponding to each order of the active sound wave is determined as the second sound signal, and the determination of the second sound signal at this time ultimately depends on the positioning of the automobile product and subjective evaluation.

In an embodiment of the present invention, the vehicle condition information includes accelerator pedal opening, brake pedal opening or motor torque information. The vehicle condition information is used to feed back the driving intention of the driver and passenger in real time.

In an embodiment of the present invention, the step of compensating the second sound signal according to the vehicle condition information, as shown in FIG. 8 , further includes the following steps:

Step 341: Determine a compensation coefficient according to the accelerator pedal opening, the brake pedal opening or the motor torque information.

In this step, specifically, the compensation coefficient may be determined according to one or more of the accelerator pedal opening, the brake pedal opening or the motor torque information.

Step 342: Compensate the second sound signal according to the compensation coefficient.

In this step, the second sound signal is compensated according to the compensation coefficient. Specifically, the initial amount to be compensated for the second sound signal may be determined first, and then the initial amount is obtained and then multiplied by the compensation coefficient to obtain The compensation amount corresponding to the second sound signal. By playing the compensated audio in the car or outside the car, the human ear can predict the working conditions of the vehicle according to the superimposed sound effects of the target compensation audio and the tram's own audio in both the car and the outside environment, so as to improve the performance of the car. The driving experience of the occupants is convenient for pedestrians outside the car to respond to the driving trend of electric vehicles and reduce the occurrence of accidents.

In an embodiment of the present invention, before the step of synthesizing the obtained compensation audio to obtain the target compensation audio, as shown in FIG. 9 , the following steps are further included:

Step 351 : Determine a rotational speed-related order compensation signal corresponding to the order, wherein the rotational speed-related order compensation signal corresponding to the order is determined according to the electric drive rotational speed signal.

In this step, the order compensation signal related to the rotational speed can increase the heavy feeling of the electric drive sound, reduce the order sharpness, and improve the quality of the electric drive sound of the electric drive car.

Step 352: Determine the compensation audio corresponding to the order according to the order compensation signal related to the rotational speed.

Wherein, the compensation audio is determined according to the characteristics of the sound pressure values of each order of the second sound signal. Specifically, for example, when the difference between the second sound signal and the preset pitch value is discontinuous, the human ear's perception of the in-vehicle whistling sound represented by the difference between the second sound signal and the preset pitch value may not match the If the operating state of the electric vehicle matches, after compensating the compensation audio determined according to the second sound signal, the human ear can perceive the whistling sound in the vehicle represented by the difference between the second sound signal and the preset tone value. Matches the running state of the electric vehicle; or when the difference between the second sound signal and the preset tone value cannot change linearly with the change of vehicle condition information, thereby affecting the human ear's perception of the difference between the first sound signal and the preset tone value. When the perception of the whistling sound in the car represented by the value, the human ear's perception of the whistling sound in the car cannot change with the change of the vehicle condition information and affect the driving experience, then the compensation is determined according to the second sound signal. After the compensation audio, the human ear's perception of the whistling sound in the car changes with the change of the vehicle condition information, thereby improving the driving experience; The compensated audio frequency determined by the second sound signal can meet the requirements of active sound waves in the car. If the car needs dynamic sound, it is necessary to actively compensate for the middle and low-order active sound waves that change with the vibration amplitude and torque to determine the compensation audio. Sci-fi sound requires active compensation of mid- and high-order active sound waves that vary with vibration amplitude and torque to determine compensation audio.

In an embodiment of the present invention, after the step of playing the target compensation audio, as shown in FIG. 10 , the following steps are further included:

Step 361: Collect in-vehicle sound.

In this step, the in-vehicle sound after the target compensation audio is played is collected to adjust the in-vehicle sound after the target compensation audio is played.

Step 362: Acquire the in-vehicle sound feature;

Step 363: Obtain a sound data analysis result according to the in-vehicle sound feature;

Step 364: Adjust the target compensation audio according to the sound data analysis result.

In this step, sound data analysis is performed according to the in-vehicle sound after playing the target compensation audio, and according to the result of the sound data analysis, the target compensation audio is appropriately adjusted to obtain a better simulation effect of tram sound effects.

The embodiment of the present invention also discloses an electric vehicle sound effect simulation device 600, as shown in FIG. 11, including a signal acquisition module 610, an identification analysis module 620, a compensation sound processing module 630, a compensation sound generation module 640, and a compensation realization module 650,

The signal acquisition module 610 is used to acquire the vibration information, electric drive speed information and vehicle condition information of the vehicle; the identification analysis module 620 is used to determine an order set according to the vibration information and the electric drive speed information, the order The sub-set includes at least one order, and each order corresponds to a sound signal; the compensation sound processing module 630 is configured to perform compensation processing on each order in the order set to obtain the compensation corresponding to each order audio; wherein performing compensation processing on the order includes: determining a target pitch value; determining a first sound signal from the sound signals corresponding to the order according to the target pitch value; The second sound signal is determined from the first sound signal, and the second sound signal is the sound signal that needs to be compensated; the sound compensation is performed on the second sound signal according to the vehicle condition information to obtain a sound signal corresponding to the order. Compensation audio; the compensation sound generation module 640 is used for synthesizing each obtained compensation audio to obtain the target compensation audio; the compensation realization module 650 is used for playing the target compensation audio.

In an embodiment of the present invention, as shown in FIG. 11 , the compensation sound processing module 630 further includes a target definition module 631 and a compensation calculation module 632, and the target definition module 631 is used to determine a target pitch value; the compensation calculation Module 632 is configured to determine the first sound signal from the sound signal corresponding to the order according to the target pitch value; determine the second sound signal from the first sound signal according to the sound pressure value of each order, and the first sound signal is The second sound signal is a sound signal that needs to be compensated; sound compensation is performed on the second sound signal according to the vehicle condition information to obtain a compensated audio frequency corresponding to the order.

The embodiment of the present invention also discloses an electric vehicle sound effect simulation system 700, as shown in FIG. 12, including an audio collection device 710, an audio playback device 720, and the electric vehicle sound effect simulation device 600 described above, the electric vehicle The sound effect simulation apparatus 600 is respectively connected to the audio collection device 710 and the audio playback device 720 .

The embodiment of the present invention also discloses an automobile, and the automobile is configured with the electric vehicle sound effect simulation system 700 as described above. The audio collection device 710 includes a microphone, and one or more microphones may be provided, whichever can accurately collect the sound in the vehicle. The audio playback device 720 includes an audio device, and the audio device may be a vehicle multimedia device, or may be a playback device independent of the vehicle multimedia. The signal acquisition module 610 includes a vibration sensor, and the vibration sensor is used to acquire vibration information of the vehicle. The frequency of the vibration signal collected by the vibration sensor is 10 Hz to 5000 Hz. The vibration signal is robust and can be affected by the environment. and use time is less affected. The installation position of the vibration sensor may be the housing position of the front and rear electric drives, or the position of the suspension side, so as to ensure convenient installation and stable collection of vibration signals.

The above disclosures are only a few preferred embodiments of the present invention, which of course cannot limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

A method for simulating sound effects of an electric vehicle, wherein the method comprises:

Obtain vehicle vibration information, electric drive speed information and vehicle condition information;

Determine an order set according to the vibration information and the electric drive rotational speed information, the order set includes at least one order, and each order corresponds to a sound signal;

performing compensation processing on each order in the order set to obtain compensation audio corresponding to each order;

Synthesize the obtained compensation audio to obtain the target compensation audio;

playing the target compensation audio;

Wherein, performing compensation processing on the order includes:

Determine the target pitch value;

Determine the first sound signal from the sound signal corresponding to the order according to the target pitch value;

Determine a second sound signal from the first sound signal according to the sound pressure value of each order, and the second sound signal is a sound signal that needs to be compensated;

The second sound signal is compensated according to the vehicle condition information to obtain the compensated audio corresponding to the order.
The method for simulating sound effects of an electric vehicle according to claim 1, wherein the determining an order set according to the vibration information and the electric drive rotational speed information comprises:

Determine the vibration frequency domain signal according to the vibration information, and determine the electric drive rotation speed signal according to the electric drive rotation speed information;

A target order set is determined according to the vibration frequency domain signal and the electric drive rotational speed signal.
The method for simulating sound effects of an electric vehicle according to claim 1, wherein the determining the target pitch value comprises:

Get the preset tone value;

The target pitch value is obtained according to the pitch value corresponding to the order and the preset pitch value.
The electric vehicle sound effect simulation method according to claim 3, is characterized in that, described acquisition preset tone value, comprises:

Determine the reference tone value according to the tone value of the background noise in the vehicle;

The reference pitch value is used as a preset pitch value.
The method for simulating sound effects of an electric vehicle according to claim 3, wherein the obtaining the target pitch value according to the pitch value corresponding to the order and the preset pitch value comprises:

Obtain the first evaluation pitch value;

determining a second evaluation pitch value according to the first evaluation pitch value and the preset pitch value;

A pitch value whose pitch value corresponding to the order is smaller than the second evaluation pitch value is determined as a target pitch value.
The method for simulating sound effects of an electric vehicle according to claim 1, wherein the determining the first sound signal from the sound signal corresponding to the order according to the target pitch value comprises:

determining the sound signal corresponding to the target pitch value;

The sound signal corresponding to the target pitch value is determined as the first sound signal.
The method for simulating sound effects of an electric vehicle according to claim 1, wherein the determining the second sound signal from the first sound signal according to the sound pressure value of each order comprises:

Extracting the features of the sound pressure values of each order in the first sound signal;

The second sound signal is determined according to the characteristics of the sound pressure values of each order.
The method for simulating sound effects of an electric vehicle according to claim 1, wherein the vehicle condition information includes accelerator pedal opening, brake pedal opening or motor torque information.
The method for simulating sound effects of an electric vehicle according to claim 8, wherein the compensating the second sound signal according to the vehicle condition information comprises:

determining a compensation coefficient according to the accelerator pedal opening, the brake pedal opening or the motor torque information;

The second sound signal is compensated according to the compensation coefficient.
The method for simulating sound effects of an electric vehicle according to claim 1, wherein before the step of synthesizing the obtained compensation audio to obtain the target compensation audio, the method further comprises:

determining a rotational speed-related order compensation signal corresponding to the order, wherein the rotational speed-related order compensation signal corresponding to the order is determined according to the electric drive rotational speed signal;

The compensation audio frequency corresponding to the order is determined according to the order compensation signal related to the rotational speed.
The method for simulating sound effects of an electric vehicle according to claim 1, wherein after the step of playing the target compensation audio, the method further comprises:

Collect the sound inside the car;

The target compensation audio is adjusted based on the in-vehicle sound.
The method for simulating sound effects of an electric vehicle according to claim 11, wherein the adjusting the target compensation audio according to the in-vehicle sound comprises:

obtaining the in-vehicle sound feature;

Obtaining a sound data analysis result according to the in-vehicle sound feature;

The target compensation audio is adjusted according to the sound data analysis result.
An electric vehicle sound effect simulation device, characterized in that it comprises a signal acquisition module (610), an identification analysis module (620), a compensation sound processing module (630), a compensation sound generation module (640) and a compensation realization module (650),

The signal acquisition module (610) is used to acquire vibration information, electric drive rotational speed information and vehicle condition information of the vehicle;

The identification and analysis module (620) is configured to determine an order set according to the vibration information and the electric drive rotational speed information, the order set includes at least one order, and each order corresponds to a sound signal;

The compensated sound processing module (630) is configured to perform compensation processing on each order in the order set to obtain compensated audio corresponding to each order; wherein performing compensation processing on the orders includes:

determining a target pitch value; determining a first sound signal from the sound signal corresponding to the order according to the target pitch value; determining a second sound signal from the first sound signal according to the sound pressure value of each order, the The second sound signal is the sound signal that needs to be compensated; the sound compensation is performed on the second sound signal according to the vehicle condition information to obtain the compensation audio corresponding to the order;

The compensation sound generation module (640) is used for synthesizing each obtained compensation audio to obtain a target compensation audio;

The compensation implementation module (650) is configured to play the target compensation audio.
The electric vehicle sound effect simulation device according to claim 13, wherein the compensation sound processing module (630) further comprises a target definition module (631) and a compensation calculation module (632),

The target definition module (631) is used to determine the target pitch value;

The compensation calculation module (632) is configured to determine the first sound signal from the sound signal corresponding to the order according to the target pitch value; determine the second sound signal from the first sound signal according to the sound pressure value of each order. A sound signal, the second sound signal is a sound signal that needs to be compensated; sound compensation is performed on the second sound signal according to the vehicle condition information to obtain a compensation audio corresponding to the order.
An electric vehicle sound effect simulation system, characterized in that it comprises an audio collection device (710), an audio playback device (720), and the electric vehicle sound effect simulation device (600) according to any one of claims 13 to 14, wherein the electric vehicle The car sound effect simulation device (600) is respectively connected with the audio collection device (710) and the audio playback device (720).
An automobile, characterized in that, the automobile is equipped with the electric vehicle sound effect simulation system according to claim 15 .