CN112037751A - Vehicle and active noise reduction control system, method, memory and control device thereof - Google Patents

Abstract

The invention belongs to the technical field of active noise reduction, and particularly provides a vehicle and an active noise reduction control method, a system, a memory and a control device thereof, wherein the method comprises the following steps: respectively analyzing noise parameters of a plurality of single-stage noise sources of the vehicle; determining an active noise reduction signal corresponding to each single-stage noise source according to the noise parameter of the single-stage noise source; determining an output active noise reduction signal according to the active noise reduction signal corresponding to each single-stage noise source; transmitting a first part of the output active noise reduction signal to a first class target end; transmitting a second part in the output active noise reduction signal to a second type target end in a set mode; the arrangement position of the first class target end is related to the head position of an occupant in the vehicle; and the frequency range of the first class target end is not lower than that of the second class target end. Through the arrangement, the active noise reduction of the new energy automobile can be achieved as comprehensively as possible.

Description

Vehicle and active noise reduction control system, method, memory and control device thereof

technical field

The present invention relates to the technical field of active noise reduction, in particular to a vehicle and an active noise reduction control system, method, memory and control device thereof.

Background technique

The basic principle of active noise reduction technology is to achieve the purpose of noise reduction at a specific sound field position by generating anti-phase sound waves that can cancel each other with noise sound waves. Different from traditional fuel vehicles, new energy vehicles (such as pure electric vehicles) have no internal combustion engine powertrain, so the in-vehicle engine noise, intake and exhaust noise, etc. related to the internal combustion engine powertrain disappear. Correspondingly, there will be other New noise problems arising from types of vibration noise sources will emerge.

The noise source of the traditional fuel engine is mainly the internal combustion engine powertrain, and the sound wave of the noise generated by the internal combustion engine powertrain has a longer wavelength. For example, the frequency range of the noise corresponding to a four-cylinder engine is usually below 200Hz. The physical vibration isolation structure and/or the related mid-low frequency active noise reduction technology can achieve the expected control effect.

In new energy vehicles, noise sources associated with noise problems include but are not limited to electric powertrains, electric compressors, etc. For example, the frequency range of acceleration whistle and braking energy recovery whistle in the interior noise caused by the electric powertrain is about 400-900Hz, and the frequency range of the interior noise caused by the electric compressor is 50Hz to 300Hz wait in between.

It can be seen that the frequency range of the noise of new energy vehicles is relatively rich, so the current noise reduction methods for fuel engines cannot effectively reduce the noise of new energy vehicles.

Accordingly, a new technical solution is needed in the art to solve the above problems.

SUMMARY OF THE INVENTION

technical problem

In view of this, the technical problem to be solved by the present invention is to provide a vehicle capable of implementing comprehensive active noise reduction for new energy vehicles and an active noise reduction control system, method, memory and control device thereof.

solution

A first aspect of the present invention provides an active noise reduction control method for a vehicle. The method includes: separately analyzing noise parameters of multiple single-level noise sources of the vehicle; the active noise reduction signal of the single-stage noise source; determine the output active noise reduction signal according to the active noise reduction signal corresponding to each single-stage noise source; transmit the first part of the output active noise reduction signal to the first type of target terminal ; transmit the second part of the output active noise reduction signal to the second type of target terminal in a set manner; wherein, the setting position of the first type of target terminal and the head of the vehicle occupant seated in the vehicle seat The location is associated; wherein, the frequency range of the first type of target terminal is not lower than the frequency range of the second type of target terminal.

With this setting, active noise reduction can be processed for multiple single-stage noise sources, so as to achieve the most comprehensive active noise reduction possible.

By sending the active noise reduction signal to the occupants through different types of target terminals, it is possible to achieve a more targeted active noise reduction effect for the occupants in the car.

Since the number of occupants in the car, the number of occupants, and the location of the occupants will affect the acoustic characteristics of the acoustic cavity in the car, in order to better perform noise reduction processing for the noise related to some single-level noise sources, the Elements such as the state of , road, people (occupants in the vehicle) and the relationship between them are introduced into the active noise reduction mechanism, that is, a "setting method" that matches these elements is given, so as to seek the active noise reduction control of the present invention. The method can seek to provide an active noise reduction strategy that is closer to the actual demand for such noise sources.

For example, the first type of target end is a medium and high frequency loudspeaker. The headrest of each car seat is integrated with a pair of high frequency speakers as the first type of target end at a position roughly corresponding to the two ears of the occupant in the car. The second type of target end is the mid-low frequency speaker installed in the door. As a simpler example, the existing car door speaker can be directly used as the second type of target terminal. Since the current car door speakers are usually fixed, in this simpler example, the setting method can be understood as the second type of target terminal is to issue the first part of the output active noise reduction signal to the occupants of the vehicle with a constant attitude. part two.

It can be understood that the active noise reduction signal can be a derived anti-phase sound wave that can directly cancel each other with the noise sound wave, or can be other signals associated with the anti-phase sound wave, such as performing an active noise reduction signal. After a certain operation, the anti-phase sound wave that can directly cancel each other with the noise sound wave can be obtained. In this regard, those skilled in the art can flexibly adjust according to actual algorithms and the like.

For the above-mentioned active noise reduction control method for a vehicle, in a possible implementation manner, the plurality of single-stage noise sources include at least one of an electric powertrain, an electric compressor, a road noise noise source, and an air conditioning box, or several.

With this arrangement, noise analysis can be performed on the electric powertrain, the electric compressor, road noise sources (mainly including tires and components directly related to tires), and the air-conditioning box, so as to provide a comprehensive and accurate active noise reduction strategy.

For the above-mentioned vehicle active noise reduction control method, in a possible implementation manner, the "transmitting the first part of the output active noise reduction signal to the first type of target terminal" includes: tracking the head of the occupant in the vehicle information; according to the head information and the parsed noise parameters of the single-level noise source of the vehicle, determine the output active noise reduction signal corresponding to the occupant in the vehicle for the single-level noise source; The language corresponding to the output active noise reduction signal of the occupants in the vehicle is sent through the first type of target terminal.

Through such a setting, the active noise reduction signal fed back to the vehicle occupant can be adjusted in time with the change of the head information of the vehicle occupant, so that more accurate active noise reduction can be performed for the individual vehicle occupant.

For the above-mentioned vehicle active noise reduction control method, in a possible implementation, in the step of "transmitting the second part of the output active noise reduction signal to the second type of target terminal in a set manner", the The "setting method" described above is determined according to the number of occupants in the vehicle and the seat position in the vehicle where the occupants are seated.

Through such an arrangement, the number of occupants in the vehicle and the specific position of the seat in the vehicle where the occupants are seated can be used as reference factors, and these reference factors can be associated with the second type of target end, so that the occupants in the vehicle can be You can get a better active noise reduction experience.

For the above-mentioned vehicle active noise reduction control method, in a possible implementation, in the step of "respectively analyzing the noise parameters of multiple single-level noise sources of the vehicle", analyze the noise of each single-level noise source of the vehicle The parameter process includes: obtaining parameters related to the single-stage noise source; analyzing the noise parameters of the single-stage noise source that needs noise reduction processing according to the parameters related to the single-stage noise source; wherein, the single-stage noise source The noise parameters include the frequency range and order of the noise.

Through such a setting, by rationally planning the type and number of parameters related to each single-stage noise source, and the degree of correlation between different parameters and noise, it is possible to more accurately target each single-stage noise source. Noise reduction processing is performed on the noise of the noise source.

Parameters such as noise related can include, but are not limited to: vibration acceleration directly related to single-stage noise sources and other parameters such as vehicle speed, motor speed/torque, motor compressor speed, etc. extracted from the CAN system.

Regarding the above-mentioned active noise reduction control method for a vehicle, in a possible implementation manner, the “determining to output an active noise reduction signal according to the active noise reduction signal corresponding to each single-stage noise source” includes: The active noise reduction signal of each single-stage noise source is directly used as the output active noise reduction signal, or the active noise reduction signal corresponding to each single-stage noise source is partially or fully integrated to form an output active noise reduction signal.

Through such a setting, a more reasonable active noise reduction mechanism can be obtained for the entire vehicle. As an example, the active noise reduction processing for the electric compressor and the air conditioner can be correlated to a certain degree, so as to obtain a more optimal active noise reduction strategy. For example, the correlation can be as follows: further analyze a certain part of the noise shared by the two, so that the respective active noise reduction signals are adjusted based on the analysis to obtain an output active noise reduction signal; and so on.

For the above-mentioned active noise reduction control method for a vehicle, in a possible implementation manner, the vehicle includes an in-vehicle audio-visual entertainment system. "Noise reduction signal" includes: mixing and processing the audio signal of the in-vehicle entertainment system and the output active noise reduction signal; respectively outputting the mixed processed audio signal and outputting the active noise reduction signal.

Through such an arrangement, it can be achieved that the transmission of the audio signal of the in-vehicle audio-visual entertainment system is not affected in the process of realizing the active noise reduction.

For example, the frequency range of the noise signal related to the electric compressor is about 50 to 300 Hz, so the audio signal corresponding to the car audio-visual entertainment system and the speaker corresponding to the output active noise reduction signal of the electric compressor can pass through the same set of speakers to communicate. Obviously, the sound mixing process should be understood as: before being transmitted to the same set of speakers, the audio signal of the car audio-visual entertainment system and the output active noise reduction signal of the electric compressor need to be mixed.

For the above-mentioned active noise reduction control method for a vehicle, in a possible implementation manner, the “determining the active noise reduction signal corresponding to the single-level noise source according to the noise parameters of each single-level noise source” includes: The residual noise near the occupants in the vehicle is collected; according to the residual noise and the noise parameters of each single-level noise source, an active noise reduction signal corresponding to the single-level noise source is determined.

Through such a setting, the error noise signal corresponding to the residual noise is introduced into the determination process of the active noise signal, so the active noise signal can be calibrated, and the active noise reduction signal for the single-stage noise source can be obtained more accurately.

It should be noted that due to the complex factors related to residual noise, for example, in addition to the single-level noise source itself, it also includes other single-level noise sources, the relationship between noise sources, environmental noise, and random noise generated by the occupants in the vehicle. noise, etc. Therefore, those skilled in the art can flexibly choose the method of collecting residual noise, and how to fuse it with the noise parameters of the single-stage noise source to calibrate the active noise reduction signal after the residual noise is introduced. If possible, configure 1 to 2 microphones for each car seat to collect residual noise, and the microphones can be integrated in the seat headrest of the car seat or arranged above the car seat (corresponding to the the overhead position of the occupant on the inner seat), the ceiling, etc.

For the above-mentioned active noise reduction control method for a vehicle, in a possible implementation manner, the “determining the active noise reduction signal corresponding to the single-level noise source according to the noise parameters of each single-level noise source” includes: Detect the opening and closing status of the doors/windows; under the premise that the doors and windows are both closed, according to the noise parameters of each single-level noise source, determine the active noise reduction signal corresponding to the single-level noise source.

Through such a setting, the effectiveness of the active noise reduction mechanism can be ensured, thus ensuring that the occupants in the vehicle can actually obtain the experience after the active noise reduction after the active noise reduction mechanism is activated.

Specifically, the current active noise reduction mechanism is actually aimed at the mechanism after basically excluding random ambient noise. Therefore, if the mechanism is activated when the door/window is opened, the occupants in the vehicle cannot actually get the Effective noise reduction effect. That is to say, the mechanism only performs active noise reduction for the noise that excludes random ambient noise, and the noise reduction for random ambient noise is not included in the coverage of the mechanism. The noise reduction effect it expects will not be obtained.

For the above-mentioned active noise reduction control method for a vehicle, in a possible implementation manner, the “determining the active noise reduction signal corresponding to the single-level noise source according to the noise parameters of each single-level noise source” includes: Detecting the vehicle speed; on the premise that the vehicle speed satisfies the preset conditions corresponding to each single-level noise source, according to the noise parameters of the single-level noise source, determine the active noise reduction signal corresponding to the single-level noise source; wherein, each The noise parameters of single-level noise sources are pre-mapped with a preset condition associated with vehicle speed.

With such a setting, a more reasonable analysis of the single-stage noise source can be performed, so that a better comprehensive noise reduction processing effect can be obtained for the entire vehicle. For example, in the case of low vehicle speed, although road noise exists objectively, the existence of such noise has little impact on the in-vehicle experience at low vehicle speed. Therefore, at this time, active noise reduction processing can be performed for other more explicit single-stage noise sources (such as electric powertrain, electric compressor, etc.), while the active noise reduction mechanism for road noise is turned off. When the vehicle speed is high, the road noise has completely covered the noise of the electric compressor. At this time, the active noise reduction mechanism for the electric compressor is operated, and the occupants in the car will not be affected by the noise reduction treatment of the electric compressor. achieve the desired noise reduction effect. Therefore, at this time, we can focus on active noise reduction for road noise, and turn off the active noise reduction mechanism for electric compressors.

A second aspect of the present invention provides an active noise reduction control system for a vehicle. The system includes: a first module configured to analyze noise parameters of multiple single-level noise sources of the vehicle respectively; a second module configured to According to the noise parameters of each single-stage noise source, determine the active noise reduction signal corresponding to the single-stage noise source; the third module is configured to determine the output active noise reduction signal according to the active noise reduction signal corresponding to each single-stage noise source. a noise reduction signal; a fourth module configured to deliver a first portion of the output active noise reduction signal to the first type of target; and a fifth module configured to deliver a second portion of the output active noise reduction signal to a set The first type of target terminal is transmitted to the second type of target terminal in a predetermined manner; wherein, the setting position of the first type of target terminal is associated with the head position of the occupant seated in the vehicle seat; wherein, the frequency range of the first type of target terminal is not below the frequency range of the second type of target.

With this setting, active noise reduction processing can be performed for multiple single-stage noise sources, so that the active noise reduction processing can be performed on the entire vehicle as comprehensively as possible.

For the above active noise reduction control system for a vehicle, in a possible implementation manner, the plurality of single-stage noise sources include at least one of an electric powertrain, an electric compressor, a road noise noise source, and an air conditioner box, or several.

With this setting, noise analysis can be performed for the electric powertrain, the electric compressor, the road noise source, and the air-conditioning box, so that a comprehensive and accurate active noise reduction strategy can be sought.

For the above-mentioned active noise reduction control system for a vehicle, in a possible implementation manner, the fourth module is further configured to: track the head information of the occupants in the vehicle; The noise parameters of the level noise source determine the output active noise reduction signal corresponding to the occupant in the vehicle for the single level noise source; pass the output active noise reduction signal corresponding to the occupant in the vehicle for the single level noise source Class target distribution.

With such an arrangement, more accurate active noise cancellation can be performed for individual vehicle occupants.

For the above-mentioned active noise reduction control system for a vehicle, in a possible implementation manner, the "setting manner" in the fifth module is based on the number of occupants in the vehicle and the seat on which the occupants are seated The chair position is determined.

Through such a setting, the occupants in the vehicle can obtain a better active noise reduction experience.

For the above-mentioned active noise reduction control system for a vehicle, in a possible implementation manner, the “process of parsing the noise parameters of each single-level noise source of the vehicle” in the first module is specifically: obtaining and the single-level noise source related parameters; according to the parameters related to the single-stage noise source, analyze the noise parameters of the single-stage noise source that needs noise reduction processing; wherein, the noise parameters of the single-stage noise source include the frequency range and order of the noise .

With such an arrangement, it is possible to more accurately perform noise reduction processing for each single-stage noise source.

For the above vehicle active noise reduction control system, in a possible implementation manner, the third module is further configured to: use the active noise reduction signal corresponding to each single-level noise source directly as the output active noise reduction signal or Part or all of the active noise reduction signals corresponding to each single-stage noise source are integrated and processed to form an output active noise reduction signal.

Through such a setting, it is possible to achieve a better active noise reduction mechanism for the entire vehicle.

For the above-mentioned active noise reduction control system for a vehicle, in a possible implementation manner, the vehicle includes an in-vehicle audio-visual entertainment system, and the third module is further configured to: control the audio signal of the in-vehicle entertainment system and the output The active noise reduction signal is mixed and processed; the mixed audio signal and the active noise reduction signal are output respectively.

Through such a setting, it can be achieved that the distribution of the audio signal of the in-vehicle audio-visual entertainment system is not affected in the process of realizing the overall active noise reduction for the whole vehicle.

For the above active noise reduction control system for a vehicle, in a possible implementation manner, the second module is further configured to: collect residual noise near the occupants in the vehicle; Noise parameter, which determines the active noise reduction signal corresponding to this single-stage noise source.

With such an arrangement, it is possible to more accurately obtain the active noise reduction signal corresponding to each single-level noise source.

For the above-mentioned active noise reduction control system for a vehicle, in a possible implementation manner, the second module is further configured to: detect the open/closed state of the vehicle door/window; under the premise that the vehicle door and the vehicle window are both closed , according to the noise parameters of each single-stage noise source, determine the active noise reduction signal corresponding to the single-stage noise source.

Through such a setting, the effectiveness of starting the active noise reduction mechanism can be guaranteed.

For the above-mentioned active noise reduction control system for a vehicle, in a possible implementation manner, the second module is further configured to: detect the vehicle speed; According to the noise parameter of the single-stage noise source, an active noise reduction signal corresponding to the single-stage noise source is determined; wherein, the noise parameter of each single-stage noise source is pre-mapped with a preset condition associated with the vehicle speed.

Through such a setting, the necessity to activate the active noise reduction mechanism can be guaranteed.

A third aspect of the present invention provides a memory that stores a program capable of executing any one of the above-mentioned active noise reduction control methods for vehicles.

It can be understood that the memory has all the technical effects of the aforementioned active noise reduction control method for a vehicle, which will not be repeated here.

A fourth aspect of the present invention provides a control device, the control device includes a memory and a processor, wherein the memory stores a program capable of executing the active noise reduction control method for a vehicle described in any of the foregoing, wherein, The processor can call the program and execute the active noise reduction control method for a vehicle described in any one of the foregoing.

It can be understood that the control device has all the technical effects of the aforementioned active noise reduction control method for a vehicle, which will not be repeated here.

A fifth aspect of the present invention provides a vehicle, which includes the active noise reduction control system of any one of the foregoing; or the vehicle includes the foregoing memory; or the vehicle includes the foregoing control device.

It can be understood that the vehicle has all the technical effects of the aforementioned active noise reduction control system, memory, and control device of the vehicle, which will not be repeated here.

Scheme 1, an active noise reduction control method for a vehicle, characterized in that the method comprises:

Analyze the noise parameters of multiple single-level noise sources of the vehicle respectively;

According to the noise parameters of each single-stage noise source, determine the active noise reduction signal corresponding to the single-stage noise source;

Determine the output active noise reduction signal according to the active noise reduction signal corresponding to each single-stage noise source;

transmitting the first part of the output active noise reduction signal to the first type of target terminal;

transmitting the second part of the output active noise reduction signal to the second type of target terminal in a set way;

Wherein, the setting position of the first type of target end is associated with the head position of the vehicle occupant sitting on the vehicle seat;

Wherein, the frequency range of the first type of target terminal is not lower than the frequency range of the second type of target terminal.

Scheme 2. The active noise reduction control method according to Scheme 1, wherein the plurality of single-stage noise sources include at least one of an electric powertrain, an electric compressor, a road noise noise source, and an air-conditioning box or several.

Scheme 3. The active noise reduction control method according to scheme 2, wherein the "transmitting the first part of the output active noise reduction signal to the first type of target terminal" comprises:

Track the head information of the occupants in the car;

According to the head information and the parsed noise parameter of the single-level noise source of the vehicle, determine the output active noise reduction signal corresponding to the occupant in the vehicle with respect to the single-level noise source;

The output active noise reduction signal corresponding to the occupant in the vehicle with respect to the single-stage noise source is sent through the first type of target terminal.

Scheme 4. The active noise reduction control method according to scheme 2, characterized in that, in the step of "transmitting the second part of the output active noise reduction signal to the second type of target terminal in a set manner", all The "setting method" described above is determined according to the number of occupants in the vehicle and the seat position in the vehicle where the occupants are seated.

Scheme 5. The active noise reduction control method according to Scheme 1, characterized in that in the step of "respectively analyzing the noise parameters of multiple single-level noise sources of the vehicle", the noise of each single-level noise source of the vehicle is analyzed The parameters of the process include:

Get parameters related to single-stage noise sources;

According to the parameters related to the single-stage noise source, analyze the noise parameters of the single-stage noise source that needs noise reduction processing;

Wherein, the noise parameters of the single-stage noise source include the frequency range and order of the noise.

Scheme 6. The active noise reduction control method according to any one of Schemes 1 to 5, characterized in that the "determining and outputting the active noise reduction signal according to the active noise reduction signal corresponding to each single-stage noise source is determined". "include:

The active noise reduction signal corresponding to each single-stage noise source is directly used as the output active noise reduction signal, or the active noise reduction signal corresponding to each single-stage noise source is partially or fully integrated to form an output active noise reduction signal. .

Scheme 7. The active noise reduction control method according to Scheme 6, characterized in that the vehicle includes an in-vehicle audio-visual entertainment system, and the "according to the active noise reduction signal corresponding to each single-stage noise source, the output active noise reduction signal is determined. Noise Reduction Signal" includes:

Mixing processing is performed on the audio signal of the in-vehicle entertainment system and the output active noise reduction signal;

Output the audio signal after mixing processing and output the active noise reduction signal respectively.

Scheme 8, the active noise reduction control method according to scheme 1, is characterized in that, described "according to the noise parameter of each single-stage noise source, determine the active noise reduction signal corresponding to this single-stage noise source" comprises:

Collect residual noise near occupants in the vehicle;

According to the residual noise and the noise parameters of each single-stage noise source, an active noise reduction signal corresponding to the single-stage noise source is determined.

Scheme 9, the active noise reduction control method according to scheme 1, is characterized in that, described "according to the noise parameter of each single-stage noise source, determine the active noise reduction signal corresponding to this single-stage noise source" comprises:

Detect the opening and closing status of doors/windows;

Under the premise that the doors and windows are both closed, according to the noise parameters of each single-level noise source, the active noise reduction signal corresponding to the single-level noise source is determined.

Scheme 10, the active noise reduction control method according to scheme 1, is characterized in that, described "according to the noise parameter of each single-stage noise source, determine the active noise reduction signal corresponding to this single-stage noise source" comprises:

detect vehicle speed;

On the premise that the vehicle speed satisfies the preset conditions corresponding to each single-stage noise source, and according to the noise parameters of the single-stage noise source, the active noise reduction signal corresponding to the single-stage noise source is determined;

Among them, the noise parameters of each single-stage noise source are pre-mapped with a preset condition associated with the vehicle speed.

Scheme 11, an active noise reduction control system for a vehicle, characterized in that the system comprises:

a first module, which is configured to separately analyze noise parameters of multiple single-level noise sources of the vehicle;

The second module is configured to determine the active noise reduction signal corresponding to the single-stage noise source according to the noise parameter of each single-stage noise source;

The third module is configured to determine and output the active noise reduction signal according to the active noise reduction signal corresponding to each single-stage noise source;

a fourth module configured to deliver the first portion of the output ANC signal to the first type of target; and

a fifth module, configured to transmit the second part of the output active noise reduction signal to the second type of target terminal in a predetermined manner;

Wherein, the setting position of the first type of target end is associated with the head position of the vehicle occupant sitting on the vehicle seat;

Wherein, the frequency range of the first type of target terminal is not lower than the frequency range of the second type of target terminal.

Solution 12. The active noise reduction control system according to solution 11, wherein the plurality of single-stage noise sources include at least one of an electric powertrain, an electric compressor, a road noise noise source, and an air-conditioning box, or several.

Scheme 13, the active noise reduction control system according to scheme 12, wherein the fourth module is further configured as:

Track the head information of the occupants in the car;

According to the head information and the parsed noise parameter of the single-level noise source of the vehicle, determine the output active noise reduction signal corresponding to the occupant in the vehicle with respect to the single-level noise source;

The output active noise reduction signal corresponding to the occupant in the vehicle with respect to the single-stage noise source is sent through the first type of target terminal.

Solution 14. The active noise reduction control system according to solution 12, wherein the "setting method" in the fifth module is based on the number of passengers in the vehicle and the seats in the vehicle where the passengers are seated The chair position is determined.

Scheme 15, the active noise reduction control system according to scheme 11, is characterized in that, in the described first module, "the process of analyzing the noise parameters of each single-level noise source of the vehicle" is specifically:

Get parameters related to single-stage noise sources;

According to the parameters related to the single-stage noise source, analyze the noise parameters of the single-stage noise source that needs noise reduction processing;

Wherein, the noise parameters of the single-stage noise source include the frequency range and order of the noise.

Scheme 16, the active noise reduction control system according to any one of schemes 11 to 15, wherein the third module is further configured as:

The active noise reduction signal corresponding to each single-stage noise source is directly used as the output active noise reduction signal, or the active noise reduction signal corresponding to each single-stage noise source is partially or fully integrated to form an output active noise reduction signal. .

Scheme 17, the active noise reduction control system according to scheme 16, is characterized in that, described vehicle comprises in-vehicle audio-visual entertainment system, and described third module is further configured as:

Mixing processing is performed on the audio signal of the in-vehicle entertainment system and the output active noise reduction signal;

Output the audio signal after mixing processing and output the active noise reduction signal respectively.

Scheme 18. The active noise reduction control system according to scheme 11, wherein the second module is further configured as:

Collect residual noise near occupants in the vehicle;

According to the residual noise and the noise parameters of each single-stage noise source, an active noise reduction signal corresponding to the single-stage noise source is determined.

Scheme 19. The active noise reduction control system according to scheme 11, wherein the second module is further configured as:

Detect the opening and closing status of doors/windows;

Under the premise that the doors and windows are both closed, according to the noise parameters of each single-level noise source, the active noise reduction signal corresponding to the single-level noise source is determined.

Scheme 20. The active noise reduction control system according to Scheme 11, wherein the second module is further configured as:

detect vehicle speed;

On the premise that the vehicle speed satisfies the preset conditions corresponding to each single-stage noise source, and according to the noise parameters of the single-stage noise source, the active noise reduction signal corresponding to the single-stage noise source is determined;

Among them, the noise parameters of each single-stage noise source are pre-mapped with a preset condition associated with the vehicle speed.

Item 21. A memory, characterized in that the memory stores a program capable of executing the active noise reduction control method for a vehicle according to any one of Items 1 to 10.

Scheme 22, a control device, characterized in that the control device comprises a memory and a processor,

Wherein, the memory stores a program capable of executing the active noise reduction control method for a vehicle described in any one of the solutions 1 to 10,

Wherein, the processor can call the program and execute the active noise reduction control method for a vehicle described in any one of solutions 1 to 10.

Solution 23. A vehicle, characterized in that the vehicle includes the active noise reduction control system according to any one of solutions 11 to 20; or

the vehicle includes the memory of option 21; or

The vehicle includes the control device of claim 22.

Description of drawings

The present invention will be described below with reference to the accompanying drawings and taking the vehicle as a pure electric vehicle (hereinafter referred to as an electric vehicle) as an example. Obviously, the vehicle can also be of other types with an electric powertrain, such as a hybrid vehicle. In the attached picture:

FIG. 1 shows a schematic structural diagram of an electric vehicle according to an embodiment of the present invention; and

Fig. 2 shows a schematic structural diagram of an active noise reduction control system for an electric vehicle according to an embodiment of the present invention.

List of reference numbers:

100, electric vehicle; 101, body; 102, door; 103, seat headrest; 11, motor; 12, reducer; 13, occupant head position tracking system; 131, camera; 132, mid-high frequency speaker; 21, Electric compressor; 22. Vibration isolation bracket; 23. Medium and low frequency speakers; 31. Chassis suspension system; 32. Subframe; 33. Tires; 4. Air conditioner box; 43. Defrost and defogging tuyere; 5. CAN system; 6. Microphone; 7. Processor array; 71. First processor; 72, Second processor; 73, Third processor; 81, Car audio and video entertainment system 82, mixer; 83, power amplifier; 200, active noise reduction control system; 210, first module; 220, second module; 230, third module; 240, fourth module; 250, fifth module.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention. For example, this embodiment is described in conjunction with one of the occupants in the car, that is, this embodiment is described for the situation where there is no difference in the position of the seat in the car and only a single occupant is seated in the car. Obviously, in the car The present invention is also applicable to a situation where the transmission modes of the active noise reduction signal are different when there are multiple interior occupants and they are seated in different vehicle seats. In addition, under the premise of no interference, the elements involved in this embodiment can be integrated and shared, such as a car audio and video entertainment system, a microphone for collecting residual noise, and the like.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The terminology of the indicated direction or positional relationship is based on the direction or positional relationship shown in the drawings, which is only for convenience of description and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation , so it should not be construed as a limitation of the present invention. Furthermore, the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Referring to Fig. 1, Fig. 1 shows a schematic structural diagram of an electric vehicle according to an embodiment of the present invention. As shown in FIG. 1 , the basic outline structure of the electric vehicle 100 includes a body 101 , four doors 102 arranged on the left and right sides of the body 101 , and an interior seat provided in the cabin, where the occupants sit on the interior seats In the case of a seat, the head of the occupant in the vehicle can generally rest against the headrest 103 of the seat in the vehicle.

In the present invention, active noise reduction control is mainly carried out for four single-stage noise sources of electric power assembly, electric compressor, road noise noise source and air-conditioning box. Based on this, first, the structure of the single-stage noise source related to active noise reduction in the electric vehicle 100 includes:

1) The structure related to the noise of the electric powertrain. Specifically: the electric powertrain mainly includes a motor 11 and a reducer 12, and an occupant head position tracking system 13 is provided corresponding to the head position of the occupant in the vehicle. The camera 131 and a pair of mid-high frequency speakers 132 are integrated in the seat headrest 103 at positions corresponding to the (left ear, right ear) of the occupant in the vehicle.

2) The structure related to the noise of the electric compressor. Specifically: the electric compressor 11 is mounted on the body 101 of the electric vehicle through the vibration isolation bracket 12. Among the four doors 102, the left front door and the right front door are respectively fixed to a mid-low frequency speaker 23 (such as an existing mid-low frequency speaker in the vehicle).

3) Structures related to road noise. Specifically: the noise sources related to the generation of road noise are mainly tires 33 and components directly related to tires, and components related to the characterization of road noise may include chassis suspension system 31, subframe 32, etc.

4) The structure related to the noise of the air-conditioning box. Specifically: the noise-related components related to the air-conditioning box are mainly the blower, and the position related to the noise representation of the blower is mainly the air duct, as shown in FIG. The defogging tuyere 43 .

On this basis, the structures related to active noise reduction in electric vehicles also include:

5) The CAN system 5 is mainly used to provide various parameters related to active noise reduction.

6) A pair of microphones 6 which are integrated in the headrest of each car seat and roughly correspond to the (left and right ear) positions of the car occupants. The microphones are mainly used to collect the Residual noise near occupants in the vehicle.

It should be noted that the microphone is mainly used to pick up the residual noise near the head sound field of the occupant in the car. Usually, 1-2 microphones are configured for each car seat, and 2 error microphones are configured for each car seat. For example, the microphone may be integrated in the headrest of the vehicle seat at a position corresponding to the (left ear, right ear) position of the seat occupant, or may be arranged inside the ceiling above the head of the vehicle occupant. In addition, as a simplification, in this embodiment, in the implementation of the active noise reduction function for each single-stage noise source, a microphone is used for the collection of residual noise.

7) The processor array 7 mainly includes a first processor 71, a second processor 72 and a third processor 73, specifically: since the active noise reduction processing of the present invention involves an active noise reduction automatic for order narrowband noise; The adaptive filtering algorithm and the active noise reduction adaptive filtering algorithm for broadband noise are two different algorithms. A feasible processing method is to burn the different algorithms in physically different processors. As in this embodiment, the active noise reduction processing for the noise of the electric powertrain and the noise of the electric compressor can share a single-core digital signal processor (the first processor 71 ), and the noise source of the road noise and the air conditioning box can be used for the active noise reduction processing. Each of the active noise reduction processing is configured with a separate dual-core digital signal processor (the second processor 72 and the third processor 73).

8) In-vehicle audio-visual entertainment system 81 , audio mixer 82 and power amplifier 83 .

Based on the aforementioned structure, the signal transmission for noise processing of the electric powertrain alone is:

The camera tracks the position (left ear, right ear) of the occupant seated in the car seat in real time and transmits it to the first processor 71, and the microphone 6 collects the residual noise near the head of the occupant in the car and transmits it to and transmits it to the first processor 71. A processor 71, the first processor 71 also picks up the reference vibration signal of the electric powertrain and extracts the motor speed, vehicle speed and torque from the CAN system. The anti-phase sound wave that can directly cancel the noise signal of the electric powertrain, this part of the anti-phase sound wave is emitted through the mid-high frequency speaker. The first processor 71 also updates the transfer function of the inverse-phase sound wave from the mid-high frequency speaker to the (left ear, right ear) positions of the occupants in the vehicle in real time through the real-time tracked positions of the occupants in the vehicle (left ear, right ear), thereby With the change of the position of the occupants (left and right ears) in the car, the output mode of the anti-phase sound waves of the mid-high frequency speakers can be adjusted in real time, and then the position and posture of the occupants in the car on the seats in the car can be determined. Under the circumstance of changing the amplitude, an active noise reduction experience for the noise of the electric powertrain with good noise reduction quality can be provided to the occupants in the vehicle.

Based on the aforementioned structure, the signal transmission for the noise processing of the electric compressor alone is:

The microphone 6 collects the residual noise near the head of the occupant in the vehicle and transmits it to and transmits it to the first processor 71. The first processor 71 also picks up the reference vibration signal of the electric compressor and extracts the rotational speed of the electric compressor from the CAN system , after processing by the first processor 71, an anti-phase sound wave that can be directly canceled with the noise signal of the electric compressor is obtained as an active noise reduction signal, and this part of the anti-phase sound wave is emitted through the medium and low frequency speakers.

As mentioned above, the electric compressor is fixed to the body of the vehicle through the vibration isolation bracket. Theoretically, by picking up the vibration signal transmitted to the vehicle body when the electric compressor is running, the vibration acceleration sensor can be arranged at any position that can transmit the vibration. However, since the vibration frequency of the electric compressor body is rich, it is not easy to analyze the vibration signal, and the addition of the vibration acceleration sensor is often accompanied by changes to the casing of the electric compressor. Therefore, in the active noise reduction control of the present invention In the method, the acceleration sensor is preferably arranged at a position of the vehicle body corresponding to the vibration isolation bracket.

Based on the aforementioned structure, the signal transmission for road noise processing alone is:

The microphone 6 collects the residual noise near the head of the occupant in the vehicle and transmits it to and transmits it to the second processor 72. The second processor 72 also picks up the reference vibration signal of the chassis suspension system that can characterize the road noise and extracts it from the CAN system. Extract the vehicle speed, the rotational speed/torque of the motor, etc., and after processing by the second processor 72, obtain the anti-phase sound wave as the active noise reduction signal that can directly cancel the road noise. This part of the anti-phase sound wave can only pass through the middle and low frequency. Loudspeaker distribution, also through mid-bass speakers and mid-high-frequency speakers.

It should be noted that the acceleration sensor of the road noise noise source is mainly used to pick up the reference vibration signal that can characterize the position related to road noise when the electric vehicle is driving, and use this signal as the reference input for the active noise reduction function for road noise. Signal. According to the actual vehicle calibration results, there are usually 4 to 8 acceleration sensors for road noise sources. The positions of the acceleration sensors include the mounting points on the body side of the chassis suspension system, and the vibration reduction support tower.

Based on the aforementioned structure, the signal transmission for the noise processing of the air-conditioning box alone is:

The microphone 6 collects the residual noise near the head of the occupant in the vehicle and transmits it to and transmits it to the third processor 73. The third processor 73 also picks up the reference noise signal of the air conditioning box and extracts the working mode of the air conditioning box, the blower from the CAN system. The duty cycle, the set target temperature, etc. are processed by the third processor 73 to obtain an anti-phase sound wave as an active noise reduction signal that can directly cancel the noise signal of the air-conditioning box. This part of the anti-phase sound wave passes through the medium. Low frequency speakers and mid-high frequency speakers.

It should be noted that the noise signal in the air duct of the air-conditioning box is mainly picked up by reference microphones, and the number of reference microphones is usually 6 to 8. Those skilled in the art can make appropriate adjustments according to the actual air-conditioning box and its air duct structure. For example, the arrangement position of the reference microphone can include the defrosting and defogging air duct, the surface blowing air duct, and the inner wall of the foot blowing air duct, and the installed state should be close to the body of the air-conditioning box. And the position needs to be determined according to the actual structure of the air-conditioning box combined with the system calibration results of the whole vehicle.

In a specific implementation, the reference microphone is a small-sized microphone, and the reference microphone is embedded on the inner wall of the air duct through a clip, so that after the reference microphone is installed, the inner wall of the air duct will not appear. The obvious structure is convex, so as to avoid the phenomenon that the arrangement of the reference microphone has an influence on the airflow in the air duct.

The anti-phase sound waves that need to be emitted by the medium and high frequency speakers and the audio signal generated by the car audio-visual entertainment system are first input into the mixer for mixing processing, and then the signal is amplified by the power amplifier, and then the two signals are transmitted to the system without interference. The medium and high frequency speakers are finally transmitted to the left and right ears of the occupants through the medium and high frequency speakers, so as to provide the passengers with high-quality active noise reduction services on the one hand, and on the other hand, to ensure that the active noise reduction can be achieved on the premise. Does not affect the transmission of audio signals to the occupants of the vehicle.

Taking the single-stage noise source of the electric compressor as an example, the following briefly describes the control method of the active noise reduction control system corresponding to the aforementioned electric vehicle. The method mainly includes the following steps:

S10, analyze the noise parameters of the electric compressor, and this step specifically includes:

a) Obtaining parameters related to noise;

As in the present embodiment, the parameters include the vibration acceleration of the electric compressor as a reference parameter and the rotational speed of the compressor as an operation parameter. In order to achieve the expected active noise reduction effect, the system can be calibrated and debugged in combination with actual driving conditions, occupants (position, number) and other factors. It can be understood that the parameters related to noise include but are not limited to this, and those skilled in the art can introduce other related parameters according to actual noise reduction requirements.

b) According to the noise-related parameters, analyze the noise parameters that need to be denoised, for example, the noise parameters usually include the frequency range and order of the noise.

S20. Determine the active noise reduction signal corresponding to the occupant in the vehicle according to the frequency range and order of the analyzed noise;

Specifically, the active noise reduction algorithm in the first processor first determines the noise that needs noise reduction processing based on the frequency range and order of the noise, and secondly calculates the anti-phase sound wave for this part of the noise.

S30, transmit the active noise reduction signal to the occupants in the vehicle in a set way through a pair of mid-low frequency speakers.

After the anti-phase sound waves are sent to a pair of mid-low frequency speakers, the noise-suppressed anti-phase sound waves emitted by the mid-low frequency speakers and the original noise transmitted to the human ear are superimposed and canceled in the sound field near the human ear, thereby achieving the purpose of noise reduction.

A specific implementation manner of "in a set manner" can be determined in the art according to specific noise reduction requirements. For example, in this embodiment, the interior space of the vehicle can be regarded as a mass point with indistinguishable local features, that is, no matter how the number of occupants in the vehicle and the position of the occupants in the vehicle change, A pair of mid-low frequency speakers is continuously in a fixed position, for example, when the occupant is seated in the rear middle seat in the car seat, the pair of mid-low frequency speakers is roughly aimed at the left and right ears of the occupant, respectively. Location.

In order to further calibrate the anti-phase sound waves, the active noise reduction control method of the present invention further includes the step of collecting the residual noise near the occupants in the vehicle through a pair of microphones, and the active noise reduction algorithm simultaneously refers to the aforementioned noise. frequency range and order and residual noise to determine the out-of-phase sound waves.

Under the circumstance that the audio signal of the in-vehicle entertainment system also needs to be released to the occupants in the vehicle through the above-mentioned pair of medium and low frequency speakers, the active noise reduction control method of the present invention further includes the step of: adding the audio signal and the anti-phase sound wave to the occupant. Before being transmitted to the same set of mid-low frequency speakers, the audio signal and anti-phase sound waves of the car entertainment system need to be mixed and processed by the mixer in turn, and then the signal is amplified by the power amplifier and then transmitted to a pair of mid-low frequency speakers.

It can be understood that the active noise reduction mechanism should be activated when the noise does not contain other uncertain noises due to environmental factors. Based on this, before the aforementioned S10, the active noise reduction control method further includes the following steps for judging whether to activate the active noise reduction mechanism, and the step specifically includes:

Detect the opening and closing status of doors/windows;

On the premise that the doors and windows are both closed, go to S10.

It can be understood that the active noise reduction mechanism should be implemented on the premise that the noise can be significantly reduced or even eliminated to improve the experience of the occupants in the vehicle. For example, when the vehicle speed is above 120km/h, road noise, wind noise, etc. have already covered the noise of the electric compressor. At this time, even if the noise corresponding to the electric compressor can be significantly reduced or even eliminated by the active noise reduction mechanism of the present invention, Nor does it improve the experience of the occupants in the car. Therefore, when the vehicle speed is too high, you can choose to actively close the active noise reduction mechanism for the electric compressor.

Referring to Table 1, Table 1 shows a diagram of the correspondence between the switch states of the active noise reduction mechanism corresponding to each single-stage noise source and the vehicle speed in the active noise reduction control method for an electric vehicle according to an embodiment of the present invention .

Table 1: Correspondence graph between the switching state and vehicle speed of the active noise reduction mechanism of a single-stage noise source

It can be seen that in Table 1, the switch states (on or not) and Correspondence between vehicle speeds. In addition, Table 1 also includes the corresponding relationship between the activation of the active noise reduction mechanism and the vehicle speed for other factors such as pedestrian safety warning sound, wind noise and so on. By correlating the vehicle speed with the activation of the active noise reduction mechanism in different aspects, a better vehicle active noise reduction effect can be achieved.

It can be understood that the active noise reduction mechanism for pedestrian safety warning tones and wind noise can be obtained by any reasonable established mechanism or through any reasonable and potential analysis means. In addition, in addition to pedestrian safety prompts and wind noise, other factors that should be equipped with an active noise reduction mechanism can also be introduced, and the active noise reduction mechanism of this factor can be combined with other factors in Table 1, and Table 1 is further analyzed. Expand, improve, etc.

In the active noise reduction control method of the present invention, by picking relevant parameters from the CAN system of the whole vehicle to perform corresponding processing, independent active noise reduction processing can be performed for the noise of each single noise source, or it can be In the process of noise reduction processing, a part of the noise is processed by active noise reduction in a cooperative operation manner.

Take the independent active noise reduction processing for the noise of each single noise source as an example:

By using the active noise reduction control method of the present invention to independently perform active noise reduction processing on the noise related to the electric powertrain, the discomfort of the occupants in the vehicle caused by the acceleration whistle and the braking energy recovery whistle can be significantly improved. experience.

By using the active noise reduction control method of the present invention to independently perform active noise reduction processing on the noise related to the electric compressor, the first-order noise and the second-order noise in the noise in the frequency range of 50-300 Hz can be almost completely eliminated .

By using the active noise reduction control method of the present invention to independently perform active noise reduction processing on road noise related to tires, etc., it is possible to realize the active noise reduction processing for road noise in the frequency range between 100 and 500 Hz, and then transmit the active noise reduction to the vehicle. The noise near the head of the occupant can be reduced by up to 6dB.

By using the active noise reduction control method of the present invention to independently perform active noise reduction processing on the noise related to the air-conditioning box, it can be realized that after the active noise reduction processing is performed on the blower noise with a frequency range of 100-1000 Hz, the occupants in the vehicle can feel better. Noise near the head can be reduced by up to about 4dBA.

Referring to Fig. 2, Fig. 2 shows a schematic structural diagram of an active noise reduction control system for an electric vehicle according to an embodiment of the present invention. As shown in FIG. 2, the active noise reduction control system 200 mainly includes:

The first module 210 is configured to analyze the noise parameters of multiple single-level noise sources of the vehicle respectively;

The second module 220 is configured to determine the active noise reduction signal corresponding to the single-stage noise source according to the noise parameter of each single-stage noise source;

The third module 230 is configured to determine and output the active noise reduction signal according to the active noise reduction signal corresponding to each single-stage noise source;

For example, when the active noise reduction processing is performed independently for each single-stage noise source, the third module 230 can directly output the active noise reduction signal as the output active noise reduction signal.

The fourth module 240 is configured to transmit the first part of the output active noise reduction signal to the aforementioned pair of mid-high frequency speakers (taking any passenger in the vehicle as an example);

The fifth module 250 is configured to transmit the second part of the output active noise reduction signal to the aforementioned pair of mid-low frequency speakers in a predetermined manner.

In the description of the present invention, "module" and "processor" may include hardware, software or a combination of both. A module may include hardware circuits, various suitable sensors, communication ports, memory, and may also include software components, such as program code, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and/or signal processing functions. The processor can be implemented in software, hardware, or a combination of the two. Non-transitory computer readable storage media include any suitable media that can store program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, and the like.

Those skilled in the art can understand that the present invention can implement all or part of the process in its control method, and can also be completed by instructing relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. , when the computer program is executed by the processor, the steps of the above-mentioned method embodiments can be implemented. Wherein, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, medium, U disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal , telecommunication signals, and software distribution media. It should be noted that the content contained in the computer-readable media may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer-readable media Electric carrier signals and telecommunication signals are not included.

Further, it should be understood that since the setting of the control module is only to describe the functional units of the system of the present invention, the physical device corresponding to the control module may be the processor itself, or a part of software in the processor, a part of hardware, Or part of a combination of software and hardware. Therefore, the number of control modules being one is merely illustrative.

It can be understood by those skilled in the art that the control module can be divided adaptively according to the actual situation. The specific splitting form of the control module will not cause the technical solution to deviate from the principle of the present invention, therefore, the technical solution after the splitting will all fall within the protection scope of the present invention.

It can be seen that, in the technical solution of this embodiment, for each single-stage noise source, based on the picked-up (reference vibration signal, parameters extracted from the CAN system) of each single-stage noise source and the collected residual noise, Anti-phase sound waves are identified as active noise reduction signals. On this basis, some or all of the single-stage noise sources can be co-processed according to the actual situation, so as to obtain a better active noise reduction effect.

It should be pointed out that, although the steps in the above embodiments are described in a specific sequence, those skilled in the art can understand that in order to achieve the effect of the present invention, different steps do not necessarily need to be executed in such an order. It can be executed simultaneously or in other order, and some steps can also be added, replaced or omitted, and these changes are all within the protection scope of the present invention.

It should be noted that, although the control method constituted in the above specific manner is described as an example, those skilled in the art can understand that the present invention should not be limited thereto. In fact, the user can flexibly adjust the relevant steps, parameters in the steps and other elements according to the actual application scenarios and other situations.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will all fall within the protection scope of the present invention.

Claims (10)

1. An active noise reduction control method of a vehicle, characterized by comprising:

respectively analyzing noise parameters of a plurality of single-stage noise sources of the vehicle;

determining an active noise reduction signal corresponding to each single-stage noise source according to the noise parameter of the single-stage noise source;

determining an output active noise reduction signal according to the active noise reduction signal corresponding to each single-stage noise source;

transmitting a first part of the output active noise reduction signal to a first class target end;

transmitting a second part in the output active noise reduction signal to a second type target end in a set mode;

wherein the arrangement position of the first class target end is associated with the head position of an in-vehicle occupant seated in the in-vehicle seat;

and the frequency range of the first class target end is not lower than that of the second class target end.

2. The active noise reduction control method of claim 1, wherein the plurality of single stage noise sources includes at least one or more of an electric power assembly, an electric compressor, a road noise source, and an air conditioning cabinet.

3. The active noise reduction control method according to claim 2, wherein said transferring the first portion of the output active noise reduction signal to the first class target comprises:

tracking head information of an occupant in the vehicle;

determining an output active noise reduction signal corresponding to an occupant in the vehicle for a single-level noise source of the vehicle based on the head information and a resolved noise parameter of the single-level noise source;

and the output active noise reduction signal corresponding to the passenger in the vehicle as far as the single-stage noise source is concerned is emitted through the first type target terminal.

4. The active noise reduction control method according to claim 2, wherein in the step of "transmitting the second portion of the output active noise reduction signal to the second type destination in a set manner", the "set manner" is determined based on the number of occupants in the vehicle and the position of the seat in the vehicle on which the occupants are seated.

5. The active noise reduction control method according to claim 1, wherein in the step of separately resolving the noise parameters of the plurality of single-stage noise sources of the vehicle, the process of resolving the noise parameters of each single-stage noise source of the vehicle comprises:

acquiring parameters related to a single-stage noise source;

analyzing the noise parameters of the single-stage noise source needing noise reduction processing according to the parameters related to the single-stage noise source;

wherein the noise parameters of the single-stage noise source comprise the frequency range and order of the noise.

6. The active noise reduction control method according to any of claims 1 to 5, wherein said determining an output active noise reduction signal from the active noise reduction signal corresponding to each single-stage noise source comprises:

and directly taking the active noise reduction signal corresponding to each single-stage noise source as an output active noise reduction signal or carrying out partial or complete integration processing on the active noise reduction signal corresponding to each single-stage noise source to form the output active noise reduction signal.

7. The active noise reduction control method of claim 6, wherein the vehicle comprises an in-vehicle audio visual entertainment system, and wherein determining the output active noise reduction signal based on the active noise reduction signal corresponding to each single-stage noise source comprises:

carrying out sound mixing processing on the audio signal of the vehicle-mounted entertainment system and the output active noise reduction signal;

and respectively outputting the audio signal after the audio mixing processing and the output active noise reduction signal.

8. The active noise reduction control method of claim 1, wherein determining the active noise reduction signal corresponding to each single-stage noise source according to the noise parameter of the single-stage noise source comprises:

collecting residual noise near passengers in the vehicle;

and determining an active noise reduction signal corresponding to each single-stage noise source according to the residual noise and the noise parameter of the single-stage noise source.

9. The active noise reduction control method of claim 1, wherein determining the active noise reduction signal corresponding to each single-stage noise source according to the noise parameter of the single-stage noise source comprises:

detecting the opening and closing state of the vehicle door/vehicle window;

and determining an active noise reduction signal corresponding to each single-stage noise source according to the noise parameter of each single-stage noise source on the premise that the vehicle door and the vehicle window are both in a closed state.

10. The active noise reduction control method of claim 1, wherein determining the active noise reduction signal corresponding to each single-stage noise source according to the noise parameter of the single-stage noise source comprises:

detecting the speed of the vehicle;

determining an active noise reduction signal corresponding to each single-stage noise source according to the noise parameter of the single-stage noise source on the premise that the vehicle speed meets the preset condition corresponding to each single-stage noise source;

and the noise parameter of each single-stage noise source is mapped with a preset condition related to the vehicle speed in advance.

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