WO2018161829A1 - New energy vehicle, and method and system for improving interior sound quality of new energy vehicle - Google Patents

Abstract

Disclosed are a new energy vehicle, and a method and system for improving interior sound quality of a new energy vehicle. The method for improving interior sound quality of a new energy vehicle comprises the following steps: acquiring a noise signal from the interior of a vehicle; performing analysis processing on the noise signal to obtain a frequency and a bandwidth of the noise signal; acquiring, according to the frequency and the bandwidth of the noise signal, a subharmonic signal corresponding to the noise signal; and controlling a vehicle-mounted audio player module to output the subharmonic signal so as to generate a harmonic signal by means of the subharmonic signal and the noise signal. The method for improving interior sound quality of a new energy vehicle can mitigate a noise problem associated with a motor in a new energy vehicle, thereby improving interior sound quality of the new energy vehicle. Moreover, the method can be implemented easily and realized at low costs.

Description

New energy vehicle and method and system for improving sound quality in new energy vehicle

This application claims the priority of the Chinese patent application filed on March 10, 2017, the Chinese Patent Office, the application number is 201710142962.4, and the invention is entitled "New Energy Vehicle and Method and System for Improving the Sound Quality of New Energy Vehicles". The content is incorporated herein by reference.

Technical field

The invention relates to the technical field of noise control, in particular to a method for improving the sound quality of a new energy vehicle, a system for improving the sound quality of a new energy vehicle and a new energy vehicle.

Background technique

With the rapid development of the new energy industry, more and more motor-related new energy products are appearing in our lives. But new energy products (such as new energy vehicles) bring convenience to our lives, but also bring us motor noise.

The high frequency noise of the motor is a kind of integrated noise, including mechanical noise, electromagnetic noise and air noise. The frequency is from 1 kHz to 12 kHz or higher. This high frequency noise will bring strong discomfort, so this is The management of noise is very necessary.

In the related art, there are two main types of motor noise control schemes: one is passive noise reduction, including structural optimization, eliminating resonance, damping materials for sound absorption and sound insulation, such as the use of traditional sound insulation, sound absorption, sound-absorbing materials to achieve noise reduction. However, passive noise reduction is limited by the heat dissipation index of the motor, and can only be limited. The high frequency noise of the motor still does not meet the ideal requirements. The other is active noise reduction, which phase cancels the low frequency motor noise. However, due to the high frequency of the motor noise and the short wavelength, it is difficult to capture its phase to generate an inverted sound wave to actively cancel. Even if you can capture, you must constantly adjust the search step size, so the number of cycles will be very large, the amount of calculation is very large, the algorithm is difficult to achieve; even if the algorithm can be realized, the hardware requirements are high and the cost is high.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the above-mentioned techniques to some extent. To this end, a first object of the present invention is to provide a method for improving the sound quality of a new energy vehicle. The method can improve the motor noise problem in the new energy vehicle, improve the sound environment quality in the vehicle, and is simple and easy to operate, and the realization cost is low.

A second object of the present invention is to provide a system for improving the sound quality of a new energy vehicle.

A third object of the present invention is to propose a new energy vehicle.

In order to achieve the above object, a first aspect of the present invention provides a method for improving sound quality in a new energy vehicle, comprising the steps of: collecting a noise signal of an interior environment; and analyzing the noise signal to obtain the a frequency and a bandwidth of the noise signal; acquiring a subharmonic signal corresponding to the noise signal according to a frequency and a bandwidth of the noise signal; controlling the vehicle audio module to output the subharmonic signal to pass the subharmonic signal A harmony signal is generated with the noise signal.

According to an embodiment of the present invention, a method for improving the sound quality of a new energy vehicle first collects a noise signal of the interior environment, and then analyzes and processes the noise signal to obtain a frequency and bandwidth of the noise signal, and then according to the frequency and bandwidth of the noise signal. Obtaining a sub-harmonic signal corresponding to the noise signal, and outputting the sub-harmonic signal through the car audio module, thereby generating a harmony sound signal that sounds pleasant, and improving the motor noise problem in the new energy vehicle. Improve the sound environment quality inside the car. In addition, the method is simple and easy to operate, and the implementation cost is low.

In addition, the method for improving the sound quality of a new energy vehicle according to the above embodiment of the present invention may further have the following additional technical features:

According to an embodiment of the invention, the acquisition of the noise signal is achieved by detecting high frequency noise generated by the motor.

According to an embodiment of the present invention, acquiring a subharmonic signal corresponding to the noise signal according to a frequency and a bandwidth of the noise signal includes: determining a frequency band to which the noise signal belongs according to a frequency and a bandwidth of the noise signal; And acquiring a preset harmony data according to the frequency band to which the noise signal belongs, to obtain a subharmonic signal corresponding to the frequency band to which the noise signal belongs, wherein the preset harmony database stores a plurality of harmony samples Each harmonic sample corresponds to a noise frequency band and includes a sub-harmonic signal corresponding to the noise frequency band.

According to an embodiment of the present invention, the process of constructing the preset harmony database includes: collecting noise of an interior environment under different working conditions to acquire a sample noise signal; and performing frequency division processing on the sample noise signal to obtain a plurality of Sample noise signals of each frequency band; the sample noise signals of each frequency band are scored according to a preset evaluation method, and a noise database is established according to the scoring result of the sample noise signals of each frequency band; any frequency band is selected from the noise database a sample noise signal, and an overtone structure of the sample noise signal of the selected frequency band to generate a plurality of overtone samples; each of the overtone samples is scored according to the preset evaluation method, and one is obtained according to the score result of each overtone sample A harmonic sample corresponding to the sample noise signal of the selected frequency band, wherein the harmony sample includes a subharmonic signal corresponding to the sample noise signal of the selected frequency band.

According to an embodiment of the invention, the frequency of the subharmonic signal corresponding to the noise signal is less than the frequency of the noise signal.

In order to achieve the above object, a second aspect of the present invention provides a system for improving sound quality in a new energy vehicle, comprising: an acquisition module for collecting a noise signal of an interior environment; and an analysis module for the noise The signal is subjected to an analysis process to obtain a frequency and a bandwidth of the noise signal; an acquisition module, configured to acquire a subharmonic signal corresponding to the noise signal according to a frequency and a bandwidth of the noise signal; a car audio module; a control module, And configured to control the car audio module to output the subharmonic signal to generate a harmony signal by using the subharmonic signal and the noise signal.

According to the embodiment of the present invention, a system for improving the sound quality of a new energy vehicle is used, and a noise signal of the vehicle interior environment is collected by the acquisition module, and the noise signal is analyzed and processed by the analysis module to obtain the frequency and bandwidth of the noise signal, and then obtain The module acquires a subharmonic signal corresponding to the noise signal according to the frequency and bandwidth of the noise signal, and controls the vehicle audio module to output the subharmonic signal through the control module, thereby generating a harmony sound signal that is pleasant to sound. Improve the motor noise problem in new energy vehicles and improve the acoustic environment quality inside the vehicle. In addition, the system is simple to operate and low in cost.

In addition, the system for improving the sound quality in a new energy vehicle of the above embodiment of the present invention may further have the following additional technical features:

According to an embodiment of the invention, the acquisition module achieves acquisition of the noise signal by detecting high frequency noise generated by the motor.

According to an embodiment of the present invention, the obtaining module includes: a determining unit, configured to determine a frequency band to which the noise signal belongs according to a frequency and a bandwidth of the noise signal; and a calling unit, configured to call a preset according to a frequency band to which the noise signal belongs And a harmony database for obtaining a subharmonic signal corresponding to the frequency band to which the noise signal belongs, wherein the preset harmony database stores a plurality of harmony samples, and each harmony sample corresponds to one noise The frequency band and includes sub-harmonic signals corresponding to the noise frequency band.

According to an embodiment of the present invention, the process of constructing the preset harmony database includes: collecting noise of an interior environment under different working conditions to acquire a sample noise signal; and performing frequency division processing on the sample noise signal to obtain a plurality of Sample noise signals of each frequency band; the sample noise signals of each frequency band are scored according to a preset evaluation method, and a noise database is established according to the scoring result of the sample noise signals of each frequency band; any frequency band is selected from the noise database a sample noise signal, and an overtone structure of the sample noise signal of the selected frequency band to generate a plurality of overtone samples; each of the overtone samples is scored according to the preset evaluation method, and one is obtained according to the score result of each overtone sample A harmonic sample corresponding to the sample noise signal of the selected frequency band, wherein the harmony sample includes a subharmonic signal corresponding to the sample noise signal of the selected frequency band.

According to an embodiment of the invention, the frequency of the subharmonic signal corresponding to the noise signal is less than the frequency of the noise signal.

Further, the present invention proposes a new energy vehicle including the system for improving the sound quality in a new energy vehicle of the above embodiment.

The new energy vehicle according to the embodiment of the present invention can improve the motor noise problem in the new energy vehicle and improve the acoustic environment quality in the vehicle through the above-mentioned system for improving the sound quality of the new energy vehicle. In addition, the above system is simple and easy to operate, and the cost is low.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a flow chart of a method of improving sound quality in a new energy vehicle in accordance with an embodiment of the present invention;

2 is a flow chart showing the construction of a preset harmony database according to an embodiment of the present invention;

3 is a block schematic diagram of a system for improving sound quality in a new energy vehicle, in accordance with one embodiment of the present invention;

4 is a block schematic diagram of a system for improving sound quality in a new energy vehicle, in accordance with an embodiment of the present invention;

Figure 5 is a block schematic diagram of a new energy vehicle in accordance with an embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

First, it should be noted that the method for improving the sound quality in a new energy vehicle proposed by the embodiment of the present invention is different from the method of the noise processing method in the related art (ie, eliminating noise or masking noise), and the method of the present invention constructs noise. To form "harmonic noise." That is to say, noise not only exists but can still be heard.

In music acoustics, the fundamental frequency determines the pitch, and the overtone determines the tone. The noise generated by motors in new energy vehicles sounds harsh because of the lack of overtones. The method for improving the sound quality of a new energy vehicle proposed by the present invention is similar to the principle of symphonic playing. When playing alone on a high frequency musical instrument (such as a clarinet), it does not sound pleasant, but in the symphony, people are very happy to accept it. . Or, when the flute plays a note alone, it doesn't feel good, even a bit harsh, but it will be very nice when playing a song.

Based on the above related principles in musical acoustics, and in accordance with the general law of psychoacoustics, the object of the present invention is to generate "harmonic noise" that is more in line with human auditory characteristics. It can be understood that the present invention can be used not only on a new energy vehicle powered by a motor, but also in other acoustic environments.

A method, system and new energy vehicle for improving the sound quality of a new energy vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

1 is a flow chart of a method of improving sound quality in a new energy vehicle in accordance with one embodiment of the present invention. As shown in FIG. 1, the method for improving the sound quality in a new energy vehicle includes the following steps:

S1, collecting noise signals of the environment inside the vehicle.

In one embodiment of the invention, the acquisition of noise signals can be achieved by detecting high frequency noise generated by the motor. It can be understood that when the new energy vehicle is driving, its motor will generate high frequency noise including mechanical noise, electromagnetic noise, air noise, etc., the frequency is from 1 kHz to 12 kHz or higher, and this high frequency noise will give people Brings a strong sense of discomfort. Therefore, the management of such high frequency noise is very necessary.

Specifically, the high frequency noise generated by the motor can be collected in real time by a sound signal receiver such as a microphone or the like and/or a rotational speed sensor. For motors with relatively constant load, high-speed noise can be collected only by the speed sensor; for motors with large load changes, high-frequency noise can be collected simultaneously by the speed sensor and the sound signal receiver to improve the acquisition accuracy of high-frequency noise.

S2, analyzing the noise signal to obtain the frequency and bandwidth of the noise signal.

Specifically, the frequency and bandwidth of the noise signal can be obtained by performing spectrum analysis on the noise signal (for example, frequency domain analysis of the collected noise signal by a spectrum analyzer).

S3. Acquire a subharmonic signal corresponding to the noise signal according to the frequency and bandwidth of the noise signal.

Among them, the subharmonic signal can form a harmony with the noise signal. For example, if the frequency of the noise signal is 1200 Hz and the frequency of the sub-harmonic signal is 600 Hz, the noise signal will coincide with the sub-harmonic signal every time it vibrates twice. It can be understood that the subharmonic signal is a sound signal.

In the embodiment of the present invention, the subharmonic signal corresponding to the noise signal may be constructed according to the frequency and bandwidth of the noise signal, such as a subharmonic signal whose frequency is half of the frequency of the noise signal; or may be preset with the noise signal. The corresponding frequency, bandwidth and the like include a database of sub-harmonic signals, and then the sub-harmonic signals in the database can be directly called according to the frequency and bandwidth of the noise signal.

In an embodiment of the invention, the frequency of the subharmonic signal corresponding to the noise signal is less than the frequency of the noise signal.

It should be noted that in the new energy vehicle, the frequency of the noise signal is already high due to the characteristics of the high frequency noise generated by the motor. If the harmonics are added, the frequency will be higher and the sound cannot be optimized. The role of the environment. Therefore, in the embodiment of the present invention, the subharmonic signal of the noise signal can be added to constitute the harmony signal.

Among them, the subharmonic is the fractional harmonic of a certain frequency, for example, the frequency of the noise signal is 3000 Hz, and the signal of 1500 Hz is obtained, and its frequency is 1/2 of the noise signal, which is its fractional harmonic. The frequency ratio of the two is 2:1, which can constitute a pure octave interval, belonging to the Concord interval, which sounds more pleasant and mellow.

S4, controlling the car audio module to output a sub-harmonic signal to generate a harmony signal through the sub-harmonic signal and the noise signal.

Specifically, after acquiring the subharmonic signal, the car audio module can be controlled to output the subharmonic signal to generate a harmony signal through the subharmonic signal and the noise signal, so that the vehicle personnel can hear a more pleasant sound.

Therefore, according to the method for improving the sound quality of the new energy vehicle, the subharmonic signal capable of generating a pleasant and acoustic signal with the collected noise signal can be obtained and output, thereby improving the noise problem in the new energy vehicle and improving the vehicle. The internal sound quality, and the method is simple and easy to operate, and the realization cost is low.

In a specific example of the present invention, the frequency band to which the noise signal belongs may be determined according to the frequency and bandwidth of the noise signal, and then the preset harmony database is called according to the frequency band to which the noise signal belongs to obtain the subharmonic corresponding to the frequency band to which the noise signal belongs. The signal, wherein the preset harmony database stores a plurality of harmony samples, each harmonic sample corresponds to a noise frequency band, and includes a subharmonic signal corresponding to the noise frequency band.

For example, the preset harmony database may include 20 harmony samples: harmony samples 1, harmony samples 2, ..., and acoustic samples 20, respectively corresponding to frequency bands of 1000-1200 Hz, 1200-1400 Hz, ..., The noise signal of 4800 ~ 5000 Hz, the sub-harmonic signals corresponding to each noise frequency band are: sub-harmonic signal 1, sub-harmonic signal 2, ..., sub-harmonic signal 20. It can be understood that the harmony sample 1 includes a noise signal and a subharmonic signal 1 having a frequency band of 1000 to 1200 Hz, and the acoustic sample 2 includes a noise signal and a subharmonic signal 2, ..., and acoustic samples having a frequency band of 1200 to 1400 Hz. 20 includes a noise signal and a sub-harmonic signal 20 having a frequency band of 4800 to 5000 Hz.

Specifically, the frequency band to which the noise signal belongs (for example, 1800 to 2000 Hz) may be determined according to the frequency of the noise signal (eg, 2000 Hz) and the bandwidth, and then the frequency band of the noise signal belongs to the frequency band of 1800 to 2000 Hz (eg, may be called by a table lookup method). A preset harmony database to obtain a subharmonic signal 5 corresponding to the frequency band to which the noise signal belongs.

It should be noted that the frequency of the actually collected noise signal is generally not fixed, and may be concentrated in a certain frequency range for fluctuation. In an example of the present invention, when the frequency fluctuation range is large, such as 3600 to 4600 Hz, and the bandwidth is 1000 Hz, the frequency of the noise signal can be considered to be unstable. In this case, the intermediate value, that is, 4000 to 4200 Hz can be regarded as the frequency band in which it is located. When the frequency fluctuation range is small, such as 4000~4100Hz, the bandwidth is 100Hz, the frequency of the noise signal can be considered to be stable. At this time, the frequency band with more intersections, that is, 4000~4200Hz can be used as the frequency band.

In some examples of the present invention, as shown in FIG. 2, the process of constructing a preset harmony database may include the following steps:

S21: Collecting noise of the interior environment under different working conditions to obtain a sample noise signal.

In an embodiment of the invention, noise signals within the new energy vehicle can be collected under different operating conditions and/or at different vehicle speeds. Specifically, under different operating conditions and/or different vehicle speeds, high frequency noise generated by the motor can be detected to achieve acquisition of noise signals within the new energy vehicle.

S22. Perform a frequency division process on the sample noise signal to obtain a sample noise signal of multiple frequency bands.

For example, the collected 1000-5000 Hz noise signal is band-divided with a bandwidth of 200 Hz, and the divided noise signal frequency bands include 1000-1200 Hz, 1200-1400 Hz, ..., 4800-5000 Hz.

S23. The sample noise signals of each frequency band are scored according to a preset evaluation method, and a noise database is established according to the score result of the sample noise signals of each frequency band.

The preset evaluation method may include: 1) determining an evaluator, the evaluator should have normal hearing, and may be a general staff member, the number of people may be required to be more than 10; 2) the scoring standard may be scored by a percentage system, and Use five-level evaluation criteria, such as: excellent: very pleasant (eg, sounds comfortable, calm, pleasant) (80-100 points), good: sweet (60-80 points), medium: generally 40-60 points) Poor: ugly (20-40 points), inferior: difficult to listen to (eg, unpleasant, disturbing, irritating, etc.) (0-20 points), that is, the evaluator can perform a percentage system based on the rating evaluation; 3) Audition conditions, such as audition evaluation in a quieter indoor environment.

For example, an evaluation evaluator consisting of 10 male and female adults, in a relatively quiet indoor environment, high-fidelity playback of sample noise signals in each frequency band, the sample noise signal of each frequency band can be played 3 times. After the sample noise signal of one frequency band is played 3 times, the sample noise signal is scored by 20 evaluators. After the sample noise signals of all frequency bands are scored, the score results are subjected to mathematical statistics to select a sample noise signal band with a lower score (for example, an average score below 40), and the selected sample noise signals are composed. Noise database.

S24. Select a sample noise signal of any frequency band from the noise database, and perform an overtone construction on the sample noise signal of the selected frequency band to generate a plurality of overtone samples.

Wherein, in the embodiment of the present invention, the overtone structure is a different sound signal (for example, a sample noise signal of a selected frequency band and a pure tone signal of a certain frequency, or a sample noise signal of a selected frequency band and a certain frequency band) The sound signal is synthesized, and the synthesized sound is an overtone sample.

Specifically, in an example of the present invention, for a sample noise signal of any frequency band selected from a noise database, a pure tone signal of a plurality of frequencies may be obtained in advance, and the pure tone signals of the plurality of frequencies are respectively selected from the selected sample noise. When the signal is played simultaneously or synthesized, it can generate multiple overtone samples of the sample noise signal of the selected frequency band.

S25: scoring each overtone sample according to a preset evaluation method, and acquiring a harmony sample corresponding to the sample noise signal of the selected frequency band according to the score result of each overtone sample, where the harmony sample includes The subharmonic signal corresponding to the sample noise signal of the selected frequency band.

It can be understood that each overtone sample can include a sample noise signal of a selected frequency band and a pure tone signal of a certain frequency, and a harmony sample is the best-scoring overtone sample, and the sample noise of the selected frequency band in the harmony sample. The subharmonic signal corresponding to the signal is the pure tone signal in the above-mentioned best overtone sample.

Further, the harmony samples corresponding to the sample noise signals of the respective frequency bands in the noise database are acquired to establish a preset harmony database.

It can be understood that the scoring person scores the sound audition according to the following principle: In music acoustics, a note sounds more pleasing because it is not a single frequency signal but consists of a fundamental frequency and harmonics. For example, the A frequency of the standard small print 1 group is 440 Hz, and the high octave small character 2 group A frequency is 880 Hz, and it can be seen that the pure octave frequency ratio is 2:1. That is to say, when playing pure octaves, the two strings vibrate, and the one with the high frequency vibrates twice, and once it coincides with the one with the lower frequency. In physics, the higher the stability ratio of harmonic energy, the more harmonious.

In addition, the frequency ratio of other intervals also includes: small second degree 16:15, major second degree 9:8, small third degree 6:5, major third degree 5:4, pure fourth degree 4:3, increased fourth degree 45:32 , minus five degrees 64:45, pure five degrees 3:2, small sixth degree 8:5, big sixth degree 5:3, small seventh degree 16:9, big seventh degree 5:27 and so on. The intervals of complete harmony in music theory include: pure one, pure eight, pure five, pure four. For example, according to the frequency is 3:2 than pure five degrees, that is, one of every six vibrations is coincident, and the coincidence rate is 1/6.

In some embodiments of the present invention, in the process of constructing the preset harmony database, when the subharmonic samples are acquired, some sample sounds may be processed according to the frequency ratio of the aforementioned consonant intervals.

In summary, according to an embodiment of the present invention, a method for improving the sound quality of a new energy vehicle first collects a noise signal of the interior environment, and then performs spectrum analysis on the noise signal to obtain a frequency and bandwidth of the noise signal, and then according to the noise signal. Frequency and bandwidth acquire a sub-harmonic signal corresponding to the noise signal, and output the sub-harmonic signal through the car audio module, thereby generating a harmonic signal that sounds pleasant and comfortable, and improving motor noise in the new energy vehicle The problem is to improve the quality of the acoustic environment inside the car. In addition, the method is simple and easy to operate, and the implementation cost is low.

3 is a block schematic diagram of a system for improving sound quality in a new energy vehicle, in accordance with one embodiment of the present invention. As shown in FIG. 3, the system for improving the sound quality of a new energy vehicle includes: an acquisition module 1, an analysis module 2, an acquisition module 3, a car audio module 4, and a control module 5.

The acquisition module 1 is configured to collect a noise signal of the environment inside the vehicle. The analysis module 2 is configured to analyze the noise signal to obtain the frequency and bandwidth of the noise signal. The acquisition module 3 is configured to acquire a subharmonic signal corresponding to the noise signal according to the frequency and bandwidth of the noise signal. The control module 5 is configured to control the car audio module 4 to output a subharmonic signal to generate a harmony signal through the subharmonic signal and the noise signal.

In some examples of the invention, the acquisition module 1 achieves the acquisition of noise signals by detecting high frequency noise generated by the motor.

Optionally, the frequency of the subharmonic signal corresponding to the noise signal is less than the frequency of the noise signal.

In some embodiments of the present invention, as shown in FIG. 4, the obtaining module 3 includes: a determining unit 31 and a calling unit 32.

The determining unit 31 is configured to determine the frequency band to which the noise signal belongs according to the frequency and bandwidth of the noise signal. The calling unit 32 is configured to call a preset harmony database according to the frequency band to which the noise signal belongs, to obtain a subharmonic signal corresponding to the frequency band to which the noise signal belongs, wherein the preset harmony database stores a plurality of harmony samples. Each harmonic sample corresponds to a noise band and includes a sub-harmonic signal corresponding to the noise band.

In some examples of the present invention, the preset harmony database construction process includes: collecting noise of the vehicle interior environment under different working conditions to obtain a sample noise signal; and frequency-dividing the sample noise signal to obtain samples of multiple frequency bands. Noise signal; the sample noise signal of each frequency band is scored according to a preset evaluation method, and a noise database is established according to the scoring result of the sample noise signal of each frequency band; a sample noise signal of any frequency band is selected from the noise database, and The sample noise signal of the selected frequency band is overtone constructed to generate a plurality of overtone samples; each overtone sample is scored according to a preset evaluation method, and a sample noise signal as a selected frequency band is obtained according to the score result of each overtone sample Corresponding harmony samples, wherein the harmony samples include sub-harmonic signals corresponding to sample noise signals of the selected frequency band.

It should be noted that the specific implementation manner of the system for improving the sound quality of the new energy vehicle in the embodiment of the present invention can be referred to the specific implementation manner of the method for improving the sound quality of the new energy vehicle in the above embodiment, in order to reduce redundancy, Do not repeat them.

According to an embodiment of the present invention, a system for improving the sound quality of a new energy vehicle collects a noise signal of the interior environment through the acquisition module, and performs spectrum analysis on the noise signal through the analysis module to obtain the frequency and bandwidth of the noise signal, and then obtains The module acquires a subharmonic signal corresponding to the noise signal according to the frequency and bandwidth of the noise signal, and controls the vehicle audio module to output the subharmonic signal through the control module, thereby generating a harmony sound signal that is pleasant to sound. Improve the motor noise problem in new energy vehicles and improve the acoustic environment quality inside the vehicle. In addition, the system is simple to operate and low in cost.

Further, the present invention proposes a new energy vehicle.

Figure 5 is a block schematic diagram of a new energy vehicle in accordance with an embodiment of the present invention. As shown in FIG. 5, the new energy vehicle 200 includes the system 100 for improving the sound quality of a new energy vehicle in the above embodiment.

The new energy vehicle according to the embodiment of the present invention can improve the motor noise problem in the new energy vehicle and improve the acoustic environment quality in the vehicle through the above-mentioned system for improving the sound quality of the new energy vehicle. In addition, the above system is simple and easy to operate, and the cost is low.

In addition, other configurations and functions of the new energy vehicle according to the embodiments of the present invention are known to those skilled in the art, and are not described herein in order to reduce redundancy.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims (11)

1. A method for improving the sound quality of a new energy vehicle, characterized in that it comprises the following steps:

   Collecting noise signals from the interior environment of the vehicle;

   Performing an analysis process on the noise signal to obtain a frequency and a bandwidth of the noise signal;

   Obtaining a subharmonic signal corresponding to the noise signal according to a frequency and a bandwidth of the noise signal;

   Controlling the car audio module to output the subharmonic signal to generate a harmony signal with the noise signal through the subharmonic signal.
2. A method of improving sound quality in a new energy vehicle according to claim 1, wherein the acquisition of said noise signal is achieved by detecting high frequency noise generated by the motor.
3. The method for improving the sound quality of a new energy vehicle according to claim 1 or 2, wherein the subharmonic signal corresponding to the noise signal is obtained according to the frequency and bandwidth of the noise signal, including:

   Determining a frequency band to which the noise signal belongs according to a frequency and a bandwidth of the noise signal;

   And acquiring a preset harmony data according to the frequency band to which the noise signal belongs, to obtain a subharmonic signal corresponding to the frequency band to which the noise signal belongs, wherein the preset harmony database stores a plurality of harmony samples Each harmonic sample corresponds to a noise frequency band and includes a sub-harmonic signal corresponding to the noise frequency band.
4. The method for improving the sound quality of a new energy vehicle according to claim 3, further comprising: constructing the preset harmony database, specifically:

   Collecting noise of the interior environment under different working conditions to obtain a sample noise signal;

   Performing a frequency division process on the sample noise signal to obtain a sample noise signal of multiple frequency bands;

   The sample noise signals of each frequency band are scored according to a preset evaluation method, and a noise database is established according to the score result of the sample noise signals of each frequency band;

   Selecting a sample noise signal of any frequency band from the noise database, and performing an overtone construction on the sample noise signal of the selected frequency band to generate a plurality of overtone samples;

   Each of the overtone samples is scored according to the preset evaluation method, and a harmony sample corresponding to the sample noise signal of the selected frequency band is obtained according to the score result of each overtone sample, wherein the harmony sample includes The subharmonic signal corresponding to the sample noise signal of the selected frequency band.
5. A method of improving sound quality in a new energy vehicle according to any one of claims 1 to 4, characterized in that the frequency of the subharmonic signal corresponding to the noise signal is smaller than the frequency of the noise signal.
6. A system for improving the sound quality of a new energy vehicle, characterized in that it comprises:

   An acquisition module for collecting a noise signal of the interior environment of the vehicle;

   An analysis module, configured to perform an analysis process on the noise signal to obtain a frequency and a bandwidth of the noise signal;

   And an acquiring module, configured to acquire a subharmonic signal corresponding to the noise signal according to a frequency and a bandwidth of the noise signal;

   Car audio module;

   And a control module, configured to control the car audio module to output the subharmonic signal to generate a harmony signal by using the subharmonic signal and the noise signal.
7. The system for improving the sound quality of a new energy vehicle according to claim 6, wherein the acquisition module realizes the collection of the noise signal by detecting high frequency noise generated by the motor.
8. The system for improving the sound quality of a new energy vehicle according to claim 5 or 6, wherein the acquisition module comprises:

   a determining unit, configured to determine, according to a frequency and a bandwidth of the noise signal, a frequency band to which the noise signal belongs;

   a calling unit, configured to call a preset harmony database according to the frequency band to which the noise signal belongs, to obtain a subharmonic signal corresponding to a frequency band to which the noise signal belongs, wherein the preset harmony database stores A plurality of harmony samples, each harmonic sample corresponding to a noise frequency band, and including a sub-harmonic signal corresponding to the noise frequency band.
9. The system for improving the sound quality of a new energy vehicle according to claim 8, wherein the process of constructing the preset harmony database comprises:

   Collecting noise of the interior environment under different working conditions to obtain a sample noise signal;

   Performing a frequency division process on the sample noise signal to obtain a sample noise signal of multiple frequency bands;

   The sample noise signals of each frequency band are scored according to a preset evaluation method, and a noise database is established according to the score result of the sample noise signals of each frequency band;

   Selecting a sample noise signal of any frequency band from the noise database, and performing an overtone construction on the sample noise signal of the selected frequency band to generate a plurality of overtone samples;

   Each of the overtone samples is scored according to the preset evaluation method, and a harmony sample corresponding to the sample noise signal of the selected frequency band is obtained according to the score result of each overtone sample, wherein the harmony sample includes The subharmonic signal corresponding to the sample noise signal of the selected frequency band.
10. A system for improving the sound quality of a new energy vehicle according to any one of claims 6 to 9, characterized in that the frequency of the subharmonic signal corresponding to the noise signal is smaller than the frequency of the noise signal.
11. A new energy vehicle characterized by comprising a system for improving the sound quality of a new energy vehicle as claimed in any one of claims 6-10.

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