CN111916048A - 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 mainly aims to solve the technical problem of active noise reduction for new energy vehicles. In view of this, the present invention provides a vehicle and its active noise reduction control method, system, memory, and control device, wherein the vehicle's active noise reduction control method includes: analyzing the noise parameters of the electric compressor of the vehicle; parameters, determine the active noise reduction signal corresponding to the electric compressor; transmit the active noise reduction signal to the target end in a set manner. Through such an arrangement, the present invention can achieve more accurate active noise reduction for the electric compressor of the new energy vehicle.

Description

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

technical field

The 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 achieves 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. For vehicles introduced into the air conditioning system, the compressor is the main noise source of the air conditioning system. For the traditional fuel engine, the main noise source is the engine, and the compressor is driven by the engine through the pulley. Therefore, the interior noise caused by the compressor itself will be masked by the engine noise, so that the vehicle The occupants will not notice the noise of the compressor. That is to say, it can be understood that for a traditional fuel engine, whether or not an air conditioning system is introduced, the main noise source of the vehicle is the engine.

Unlike fuel vehicles, new energy vehicles (such as electric vehicles) use electric compressors. As an independent noise source, the electric compressor is an independent noise source. In summer, the cooling demand of the air-conditioning system almost completely covers the period of vehicle use and the cooling demand is relatively large, which makes the compressor rotate at a high speed and brings obvious noise problems in the vehicle; in winter When heating is required, the electric compressor will also be activated, which will also cause certain noise problems in the car. In addition, for electric vehicles, in addition to meeting the cooling/heating needs of the air-conditioning system, when the power battery or motor needs to be cooled, the electric compressor will be activated separately to perform a refrigeration cycle, so as to promote the heat dissipation process of the power battery or motor. , compared with the working condition that meets the cooling/heating demand of the air conditioning system, the noise problem in the vehicle caused by the electric compressor at this time will be more obvious.

The in-vehicle noise caused by the electric compressor is mainly medium and low frequency noise caused by structural transmission. For example, the frequency range of the in-vehicle noise caused by the electric compressor is between 50Hz and 300Hz. The application of physical vibration isolation measures for electric compressors will reduce the interior noise caused by electric compressors to a certain extent, but it cannot effectively reduce or even eliminate noise.

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 active noise reduction for a new energy vehicle 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 comprising: analyzing a noise parameter of an electric compressor of the vehicle; determining an active noise reduction signal corresponding to the electric compressor according to the noise parameter; The active noise reduction signal is transmitted to the target end in a set manner.

With such an arrangement, the active noise reduction signal for the electric compressor can be fed back to the occupants in a set manner, and by matching the setting pattern with the occupants in the vehicle, it is possible to achieve effective noise reduction for the occupants in the vehicle. Active noise reduction for electric compressors.

Since the number of occupants in the car and the position of the occupants in the car will affect the acoustic characteristics of the acoustic cavity in the car, in order to better reduce the noise of the electric compressor, the number of occupants in the car and the According to the position of the seat in the vehicle where the occupant is located, etc., the "setting mode" that matches it is given, so that the active noise reduction control method of the present invention can achieve effective active noise reduction for the electric compressor for the occupant in the vehicle. . The target can be any component that emits an ANC signal, such as a speaker. For example, the setting method can be an active method or a fixed method. Taking the active method as an example, it can be: if there is only a driver in the car, adjust the position and posture of the speaker according to the position of the seat in the car where the driver is located. ; Assuming that there is a driver and occupants in the car, adjust the speaker to a certain orientation; assuming that there is a driver and occupants in the car, adjust the position and posture of the speaker according to the distribution of the people in the car; Set a pre-priority for the seats in the car to adjust the position and posture of the speakers to meet the principle of high priority. For example, only set the highest priority for a certain car seat in advance. When there is an occupant in the car, adjust the position and posture of the speaker directly according to the principle of the best position; and so on. In addition, the binaural positions of the driver/occupant can also be introduced. For example, when the driver/occupant slightly adjusts the sitting posture on the car seat, the binaural position will change to a certain extent. Such changes make corresponding adjustments to the way the settings are made.

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 "analyzing the noise parameters of the electric compressor of the vehicle" includes: acquiring noise-related parameters; according to the noise-related parameters , and analyze the noise parameters that need to be noise-reduced; wherein, the noise parameters include the frequency range and order of the noise.

With such an arrangement, by appropriately planning the types and numbers of noise-related parameters, and the degree of correlation between different parameters and noise, it is possible to more accurately perform noise reduction processing for the noise of the electric compressor. .

For the above-mentioned active noise reduction control method for a vehicle, in a possible implementation manner, the noise-related parameters include picked-up reference parameters and operating parameters extracted from a CAN system, wherein the reference parameters include an electric compressor The vibration acceleration transmitted to the vehicle body, the operating parameter includes at least the rotational speed of the electric compressor.

With this setting, a specific selection of noise-related parameters is given.

Sound waves are vibration-related products, so by picking up the vibration acceleration transmitted by the electric compressor to the body, the basic noise parameters can be resolved. Based on the rotational speed tracking provided by the rotational speed of the electric compressor, it is possible to determine the noise order for which it is judged that noise reduction processing is required. Therefore, on the basis of vibration acceleration, the speed of the electric compressor is introduced into the active noise reduction adaptive algorithm to determine the system parameters that need noise reduction under the current working conditions, so as to provide the occupants in the car with the real demand, Active noise reduction signal for noise reduction processing for electric compressors.

For the above-mentioned active noise reduction control method for a vehicle, in a possible implementation manner, the electric compressor is directly arranged on the body of the vehicle or the electric compressor is arranged on the body of the vehicle through a vibration isolation bracket, and the vibration is detected. The acceleration detecting means is provided at a position of the vehicle body corresponding to the electric compressor or the vibration isolation bracket.

With such an arrangement, it is possible to achieve stable vibration acceleration detection. Taking the detection component as an acceleration sensor as an example, 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 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, it is preferable to avoid arranging the acceleration sensor on the body of the electric compressor.

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. "active noise reduction signal" includes: determining an active noise reduction signal according to the noise parameter; performing mixing processing on the audio signal of the in-vehicle entertainment system and the active noise reduction signal; outputting the mixed-processed audio signal and Active Noise Cancellation Signal.

With such an arrangement, the transmission of the audio signal of the in-vehicle audio-visual entertainment system can be achieved without affecting the transmission of the audio signal of the in-vehicle audio-visual entertainment system during the process of implementing the active noise reduction for the electric compressor.

Since the frequency range of the noise signal related to the electric compressor is about 50 to 300 Hz, an existing mid-low frequency speaker or a mid-low frequency speaker for active noise reduction can be separately configured to realize the distribution of the active noise reduction signal.

Taking the separately configured mid- and low-frequency speakers as an example, obviously, the audio signal issued by the in-vehicle audio-visual entertainment system can be conveyed to the occupants in the vehicle through, but not limited to, the separately configured mid-low and low-frequency speakers. However, assuming that the speakers corresponding to the audio signal and the speakers corresponding to the active noise reduction signal are two sets of speakers, the layout in the car will not be simple and compact, so the two signals are usually transmitted through the same set of speakers. Based on this, the two signals need to be mixed before being transmitted to the same set of speakers.

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 electric compressor according to the noise parameter” includes: collecting residual noise near the occupant in the vehicle noise; according to the residual noise and the noise parameter, determining an active noise reduction signal corresponding to an occupant in the vehicle.

With this arrangement, 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 corresponding to the electric compressor can be obtained more accurately.

It should be noted that due to the complex factors related to residual noise, such as the operation of other modules such as the electric powertrain, environmental noise, and random noise generated by the occupants in the vehicle, in addition to the electric compressor itself. 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 electric powertrain 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 headrest of the car seat or arranged above the car seat (corresponding to the The overhead position of the occupants in the car), the inside of the carport, 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 electric compressor according to the noise parameter” includes: detecting the opening of a door/window closed state; on the premise that both the door and the window are closed, according to the noise parameter, determine the active noise reduction signal corresponding to the electric compressor.

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

Specifically, the current active noise reduction mechanism is actually aimed at the mechanism after the environmental noise is basically excluded. Therefore, if the mechanism is activated when the door/window is opened, the occupants in the vehicle cannot actually get effective noise reduction effect. That is to say, the mechanism only performs active noise reduction processing on the noise that excludes environmental noise, and the noise reduction for environmental noise is not included in the coverage of the mechanism. It will get its desired active noise cancellation effect.

For the above-mentioned vehicle active noise reduction control method, in a possible implementation manner, the “determining the active noise reduction signal corresponding to the electric compressor according to the noise parameter” includes: detecting the vehicle speed; when the vehicle speed is less than or equal to On the premise of setting the speed, according to the noise parameter, the active noise reduction signal corresponding to the occupant in the vehicle is determined.

When the vehicle speed is high (such as above 80km/h), road noise/wind noise has completely covered up the noise of the electric compressor. At this time, the active noise reduction mechanism is operated, and the occupants in the car will not be affected by the electric compressor. Active noise reduction processing to obtain the desired noise reduction effect. Therefore, the active noise reduction mechanism is turned off at this time. That is to say, in this case, due to the particularity of the working conditions, there will be no significant difference in the experience of the occupants in the car due to the active noise reduction of the electric compressor. Under operating conditions, turn off the active noise reduction mechanism.

For the above-mentioned active noise reduction control method for a vehicle, in a possible implementation manner, the target end is a speaker that is fixedly disposed on the door of the vehicle.

Through such setting, a specific implementation form of the target end is provided.

It should be noted that the speaker of the vehicle door may be an existing speaker installed in the vehicle door, or may be a mid-low frequency speaker specially configured for the introduction of the active noise reduction mechanism of the electric compressor. As in a simple example, the speaker of the vehicle door may be an existing speaker disposed in the vehicle door.

A second aspect of the present invention provides an active noise reduction control system for a vehicle, the system comprising: a first module configured to analyze noise parameters of an electric compressor of a vehicle; a second module configured to analyze noise parameters according to the noise parameters, determining an active noise reduction signal corresponding to the electric compressor; and a third module configured to transmit the active noise reduction signal to the target in a set manner.

With such an arrangement, it is possible to achieve effective active noise reduction for the electric compressor for the occupant in the vehicle.

For the above-mentioned active noise reduction control system for a vehicle, in a possible implementation manner, the first module is further configured to: acquire parameters related to noise; analyze the noise that needs noise reduction processing according to the parameters related to noise parameters; wherein, the noise parameters include the frequency range and order of the noise.

With such an arrangement, it is possible to more accurately perform noise reduction processing on the noise of the electric compressor.

For the above active noise reduction control system for a vehicle, in a possible implementation manner, the noise-related parameters include picked-up reference parameters and operating parameters extracted from the CAN system, wherein the reference parameters include an electric compressor The vibration acceleration transmitted to the vehicle body, the operating parameter includes at least the rotational speed of the electric compressor.

With this setting, a specific selection of noise-related parameters is given.

For the above active noise reduction control system for a vehicle, in a possible implementation manner, the electric compressor is directly disposed on the body of the vehicle or the electric compressor is disposed on the body of the vehicle through a vibration isolation bracket, for detecting the electric compressor The detection part of the vibration acceleration transmitted by the compressor to the vehicle body is provided at a position of the vehicle body corresponding to the electric compressor or the vibration isolation bracket.

Through this setting, a better signal acquisition scheme is given.

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 second module is further configured to: determine an active noise reduction signal according to the noise parameter; The audio signal of the in-vehicle entertainment system and the active noise reduction signal are mixed and processed; the mixed processed audio signal and the active noise reduction signal are respectively output.

With such an arrangement, the transmission of the audio signal of the in-vehicle audio-visual entertainment system can be achieved without affecting the transmission of the audio signal of the in-vehicle audio-visual entertainment system during the process of implementing the active noise reduction for the electric compressor.

For the above-mentioned active noise reduction control system for a vehicle, in a possible implementation manner, the first module is further configured to: analyze residual noise near the occupant in the vehicle; the second module is further configured to: according to the residual noise The noise and the noise parameters determine the active noise reduction signal corresponding to the electric compressor.

With such an arrangement, the active noise reduction signal corresponding to the electric compressor can be obtained more accurately.

For the above active noise reduction control system for a vehicle, in a possible implementation manner, the system includes a fourth module, and the fourth module is configured to: detect the opening and closing status of the door/window; On the premise that all of them are in an off state, according to the noise parameter, an active noise reduction signal corresponding to the electric compressor is determined.

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

For the above active noise reduction control system for a vehicle, in a possible implementation manner, the system includes a fifth module, and the fifth module is configured to: detect the vehicle speed; on the premise that the vehicle speed is less than or equal to the set speed, according to The noise parameters are determined to correspond to active noise reduction signals for occupants in the vehicle.

Through such a setting, the necessity to activate 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 target end is a speaker that is fixedly arranged on the door of the vehicle.

Through such setting, a specific implementation form of the target end is provided.

A third aspect of the present invention provides a memory, where the memory stores a program capable of executing the active noise reduction control method for a vehicle described in any one of the foregoing.

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 includes:

Analyze the noise parameters of the electric compressor of the vehicle;

determining an active noise reduction signal corresponding to the electric compressor according to the noise parameter;

The active noise reduction signal is transmitted to the target end in a set manner.

Scheme 2. The active noise reduction control method according to Scheme 1, wherein the "analyzing the noise parameters of the electric compressor of the vehicle" includes:

Get parameters related to noise;

According to the noise-related parameters, analyze the noise parameters that need to be noise-reduced;

Wherein, the noise parameter includes the frequency range and order of the noise.

Scheme 3. The active noise reduction control method according to Scheme 2, wherein the noise-related parameters include picked-up reference parameters and operating parameters extracted from the CAN system,

Wherein, the reference parameter includes the vibration acceleration transmitted by the electric compressor to the vehicle body, and the operation parameter includes at least the rotational speed of the electric compressor.

Option 4. The active noise reduction control method according to Option 3, wherein the electric compressor is directly arranged on the body of the vehicle or the electric compressor is arranged on the body of the vehicle through a vibration isolation bracket, and is used to detect the electric compressor The detection part of the vibration acceleration transmitted by the compressor to the vehicle body is provided at a position of the vehicle body corresponding to the electric compressor or the vibration isolation bracket.

Scheme 5. The active noise reduction control method according to any one of Schemes 1 to 4, characterized in that the vehicle includes an in-vehicle audio-visual entertainment system. The Active Noise Cancellation Signal" includes:

determining an active noise reduction signal according to the noise parameter;

mixing and processing the audio signal of the in-vehicle entertainment system and the active noise reduction signal;

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

Scheme 6. The active noise reduction control method according to Scheme 1, wherein the "determining the active noise reduction signal corresponding to the electric compressor according to the noise parameter" comprises:

Collect residual noise near occupants in the vehicle;

Based on the residual noise and the noise parameter, an active noise reduction signal corresponding to the electric compressor is determined.

Scheme 7. The active noise reduction control method according to Scheme 1, wherein the "determining the active noise reduction signal corresponding to the electric compressor according to the noise parameter" comprises:

Detect the opening and closing status of doors/windows;

On the premise that both the door and the window are closed, according to the noise parameter, an active noise reduction signal corresponding to the electric compressor is determined.

Scheme 8. The active noise reduction control method according to Scheme 1, wherein the "determining the active noise reduction signal corresponding to the electric compressor according to the noise parameter" comprises:

detect vehicle speed;

On the premise that the vehicle speed is less than or equal to the set speed, the active noise reduction signal corresponding to the occupant in the vehicle is determined according to the noise parameter.

Solution 9. The active noise reduction control method according to solution 1, characterized in that, the target end is a speaker disposed on a vehicle door.

Solution 10. An active noise reduction control system for a vehicle, characterized in that the system includes:

a first module configured to parse noise parameters of the electric compressor of the vehicle;

A second module configured to determine an active noise reduction signal corresponding to the electric compressor based on the noise parameter; and

The third module is configured to transmit the active noise reduction signal to the target end in a predetermined manner.

Scheme 11. The active noise reduction control system according to scheme 10, wherein the first module is further configured as:

Get parameters related to noise;

According to the noise-related parameters, analyze the noise parameters that need to be noise-reduced;

Wherein, the noise parameter includes the frequency range and order of the noise.

Scheme 12. The active noise reduction control system according to scheme 11, wherein the noise-related parameters include picked-up reference parameters and operating parameters extracted from the CAN system,

Wherein, the reference parameter includes the vibration acceleration transmitted by the electric compressor to the vehicle body, and the operation parameter includes at least the rotational speed of the electric compressor.

Solution 13. The active noise reduction control system according to solution 12, wherein the electric compressor is directly installed on the body of the vehicle or the electric compressor is installed on the body of the vehicle through a vibration isolation bracket, for detecting the electric compressor The detection part of the vibration acceleration transmitted by the compressor to the vehicle body is provided at a position of the vehicle body corresponding to the electric compressor or the vibration isolation bracket.

Solution 14: The active noise reduction control system according to any one of solutions 10 to 13, wherein the vehicle includes an in-vehicle audio-visual entertainment system, and the second module is further configured as:

determining an active noise reduction signal according to the noise parameter;

mixing and processing the audio signal of the in-vehicle entertainment system and the active noise reduction signal;

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

Solution 15. The active noise reduction control system according to solution 10, characterized in that:

The first module is also configured as:

Analyze residual noise near occupants in the vehicle;

The second module is further configured as:

Based on the residual noise and the noise parameter, an active noise reduction signal corresponding to the electric compressor is determined.

Solution 16. The active noise reduction control system according to solution 10, wherein the system includes a fourth module, and the fourth module is configured as:

Detect the opening and closing status of doors/windows;

On the premise that both the door and the window are closed, according to the noise parameter, an active noise reduction signal corresponding to the electric compressor is determined.

Solution 17. The active noise reduction control system according to solution 10, wherein the system includes a fifth module, and the fifth module is configured as:

detect vehicle speed;

On the premise that the vehicle speed is less than or equal to the set speed, the active noise reduction signal corresponding to the occupant in the vehicle is determined according to the noise parameter.

Solution 18. The active noise reduction control system according to solution 10, characterized in that the target end is a speaker disposed on a vehicle door.

Item 19. 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 9.

Solution 20. A control device, characterized in that 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 according to any one of solutions 1 to 9,

Wherein, the processor can call the program and execute the active noise reduction control method for a vehicle according to any one of solutions 1 to 9.

Solution 21. A vehicle, characterized in that the vehicle includes the active noise reduction control system according to any one of solutions 10 to 18; or

The vehicle includes the memory of option 19; or

The vehicle includes the control device of claim 20 .

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 a hybrid car or other type with an electric powertrain. In the attached picture:

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

FIG. 2 shows a schematic flowchart of an active noise reduction control method for an electric vehicle according to an embodiment of the present invention; and

FIG. 3 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; 11, electric compressor; 12, vibration isolation bracket; 13, body; 2, CAN system; 3, active noise reduction control system; 311, front left door; 312, front left door; 32, Speaker; 33, Microphone; 34, Processor; 35, Mixer; 36, Power amplifier; 37, Seat headrest; 4, Car audio and video entertainment system; 10, First module; 20, Second module; 30, The third module; 40, the fourth module; 50, the 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 occupant in the vehicle, that is, this embodiment is described for the situation where there is no difference in the position in the vehicle and only a single occupant is seated in the vehicle. Obviously, there are multiple occupants in the vehicle. In addition, the present invention is also suitable for situations where the transmission modes of the active noise reduction signal are different when the occupants in the vehicle sit on the vehicle seats at different positions. 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 electric vehicle 100 includes an electric compressor assembly, a vehicle CAN system 2, an active noise reduction control system 3, and an in-vehicle audio-visual entertainment system 4. The compressor assembly includes an electric compressor 11 and a vibration isolation bracket 12. The electric compressor The engine 11 is installed on the body 13 of the electric vehicle through the vibration isolation bracket 12 . The active noise reduction control system 3 mainly includes a pair of speakers 32 (such as existing mid-low frequency speakers in the car), which are respectively arranged on the front left door 311 and the front right door 312 , and a seat head integrated in the car seat. The microphone 33 in the pillow 37 or installed on the inner side of the carport corresponding to the position above the head of the occupant in the car (for example, in the headrest of the car seat, a pair of microphones 33 are integrated in the position corresponding to the left ear and the right ear of the occupant, respectively). microphone), processor 34, mixer 35, power amplifier 36. The microphone 33 is mainly used to collect the residual noise of the occupants sitting in the car seat and transmit the collected residual noise to the processor. The processor also picks up the vibration acceleration of the electric compressor and extracts the vibration acceleration of the electric compressor from the CAN system. Rotation speed, the narrow-band noise adaptive filtering algorithm is programmed in the processor, such as the filtered least mean square (FxLMS) algorithm, the filtered recursive least squares (FxRLS) algorithm and other technologies that have been applied to mass production vehicles. Those skilled in the art can Choose flexibly according to the actual situation. Based on the aforementioned information collected, picked up and extracted, an anti-phase sound wave that can be directly canceled with the noise signal is obtained as an active noise reduction signal after algorithm processing. The anti-phase sound wave and the audio signal generated by the car audio-visual entertainment system are input into the mixer for mixing processing, and then the signal is amplified by the power amplifier, and finally the two signals are sent to the speaker without interference to release the active noise reduction signal. On the one hand, it can provide high-quality active noise reduction services for electric compressors for the occupants in the car, and on the other hand, it can ensure that the audio signal to the occupants in the car is not affected under the premise that the active noise reduction can be realized. distribution.

Referring to FIG. 2 , FIG. 2 shows a schematic flowchart of an active noise reduction control method for an electric vehicle according to an embodiment of the present invention. As shown in Figure 2, the method mainly includes the following steps:

S210, analyzing the noise parameters of the electric compressor of the electric vehicle, the 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 operating 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 (location, 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 parameters related to the noise, analyze the noise parameters that need to be noise-reduced. For example, the noise parameters usually include the frequency range and order of the noise.

S220, according to the frequency range and order of the analyzed noise, determine the active noise reduction signal corresponding to the occupant in the vehicle;

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

S230 , transmitting the active noise reduction signal to the occupants in the vehicle in a set manner through a pair of speakers disposed on the left door and the right door.

After the anti-phase sound waves are sent to a pair of speakers, the noise-suppressed anti-phase sound waves emitted by the 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, regardless of the number of occupants in the vehicle and the position of the occupants in the vehicle Variation, a pair of speakers in the front left door and front right door remain in fixed positions.

In order to further calibrate the anti-phase sound waves, in this method, the residual noise near the occupants in the vehicle can also be collected through the microphone. Based on this, the active noise reduction algorithm simultaneously refers to the frequency range and order of the aforementioned noise and the residual noise. , to determine the out-of-phase sound waves.

On the premise that the in-vehicle entertainment system and the active noise reduction control system are designed to share speakers, the audio signal of the in-vehicle entertainment system and the anti-phase sound wave corresponding to the active noise reduction function need to be passed through in turn before the anti-phase sound waves are transmitted to the speakers. The mixer performs mixing processing, and the signal is amplified by the power amplifier and then transmitted to the speakers.

It can be understood that the active noise reduction mechanism should be activated when the noise of the air conditioning system does not contain other uncertain noises caused by environmental factors. Based on this, before the aforementioned S210, 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 S210, that is, in the case that the noise source of the air conditioning system is mainly attributed to the electric compressor, according to the aforementioned S210 to S230, finally determine the corresponding electric compressor. Active Noise Cancellation Signal.

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 so that the experience of the occupants in the vehicle can be improved. For example, when the vehicle speed is above 80km/h, road noise/wind noise has 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 turn off the active noise reduction mechanism. Based on this, in the aforementioned processes from S210 to S220, the active noise reduction control method further includes the following steps for judging whether to turn off the active noise reduction mechanism, and the step specifically includes:

detect vehicle speed;

On the premise that the vehicle speed is less than or equal to a higher set speed, according to the aforementioned S210 to S220, the active noise reduction signal corresponding to the occupant in the vehicle is finally determined. For example, the set speed is a certain value between 70-120km/h.

It can be understood that, the aforementioned processor, vehicle audio-visual entertainment system, audio mixer, power amplifier, etc. may all be separate modules, or may be modules that are appropriately integrated together. For example, the processor can be integrated in the car audio and video entertainment system, or it can be integrated with the power amplifier.

Referring to FIG. 3 , FIG. 3 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. 3 , the system mainly includes a first module 10 configured to perform S210 of the aforementioned method, a second module 20 to perform S220 of the aforementioned method, a third module 30 to perform S230 of the aforementioned method, and a module for performing S230 of the aforementioned method. The fourth module 40 for judging whether to activate the active noise reduction mechanism and the fifth module 50 for executing the steps of the aforementioned method for judging whether to turn off the active noise reduction mechanism.

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 parts, such as program codes, 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 may 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 may be in the form of source code, object code, executable file or some intermediate form, and the like. 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.

Those skilled in the art can understand that, the control module can be divided adaptively according to the actual situation. The specific disassembly 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 disassembly will fall within the protection scope of the present invention.

It can be seen that, in the technical solution of this embodiment, based on the picked-up vibration acceleration transmitted from the electric compressor to the vehicle body, the rotational speed of the electric compressor extracted from the CAN system, and the collected residual noise, a determination is made as to determine the vibration acceleration for the electric compressor. Anti-phase sound waves of an active noise reduction signal. On this basis, the number and distribution of occupants in the car can be analyzed, and the position and posture of the speaker as the target end can be adjusted to better send the inverse phase of the active noise reduction signal to the occupants in the car. Bit sound waves. In addition, in the case where the car audio-visual entertainment system and the active noise reduction control system share speakers, the audio signal and the anti-phase sound wave are simultaneously released without interference and synchronously through the method of mixing processing.

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 with reference to the preferred embodiments shown in the accompanying drawings, however, 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 substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. An active noise reduction control method for a vehicle, wherein the method comprises: Analyze the noise parameters of the electric compressor of the vehicle; determining an active noise reduction signal corresponding to the electric compressor according to the noise parameter; The active noise reduction signal is transmitted to the target end in a set manner. 2. The active noise reduction control method according to claim 1, wherein the "analyzing the noise parameters of the electric compressor of the vehicle" comprises: Get parameters related to noise; According to the noise-related parameters, analyze the noise parameters that need to be noise-reduced; Wherein, the noise parameter includes the frequency range and order of the noise. 3. The active noise reduction control method according to claim 2, wherein the noise-related parameters include reference parameters picked up and operating parameters extracted from the CAN system, Wherein, the reference parameter includes the vibration acceleration transmitted by the electric compressor to the vehicle body, and the operation parameter includes at least the rotational speed of the electric compressor. 4 . The active noise reduction control method according to claim 3 , wherein the electric compressor is directly arranged on the body of the vehicle or the electric compressor is arranged on the body of the vehicle through a vibration isolation bracket, which is used to detect the electric compressor. 5 . The detection part of the vibration acceleration transmitted by the compressor to the vehicle body is provided at a position of the vehicle body corresponding to the electric compressor or the vibration isolation bracket. 5. The active noise reduction control method according to any one of claims 1 to 4, wherein the vehicle includes an in-vehicle audio-visual entertainment system, and the "according to the noise parameters, determine the corresponding electric compressor" The Active Noise Cancellation Signal" includes: determining an active noise reduction signal according to the noise parameter; mixing and processing the audio signal of the in-vehicle entertainment system and the active noise reduction signal; Output the audio signal after mixing processing and the active noise reduction signal respectively. 6 . The active noise reduction control method according to claim 1 , wherein the “determining the active noise reduction signal corresponding to the electric compressor according to the noise parameter” comprises: 6 . Collect residual noise near occupants in the vehicle; Based on the residual noise and the noise parameter, an active noise reduction signal corresponding to the electric compressor is determined. 7. The active noise reduction control method according to claim 1, wherein the "determining the active noise reduction signal corresponding to the electric compressor according to the noise parameter" comprises: Detect the opening and closing status of doors/windows; On the premise that both the door and the window are closed, according to the noise parameter, an active noise reduction signal corresponding to the electric compressor is determined. 8. The active noise reduction control method according to claim 1, wherein the "determining the active noise reduction signal corresponding to the electric compressor according to the noise parameter" comprises: detect vehicle speed; On the premise that the vehicle speed is less than or equal to the set speed, the active noise reduction signal corresponding to the occupant in the vehicle is determined according to the noise parameter. 9 . The active noise reduction control method according to claim 1 , wherein the target end is a speaker arranged on a vehicle door. 10 . 10. An active noise reduction control system for a vehicle, wherein the system comprises: a first module configured to parse noise parameters of the electric compressor of the vehicle; A second module configured to determine an active noise reduction signal corresponding to the electric compressor based on the noise parameter; and The third module is configured to transmit the active noise reduction signal to the target end in a predetermined manner.

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