CN115206279A - Vehicle noise reduction processing system and method and vehicle - Google Patents
Vehicle noise reduction processing system and method and vehicle Download PDFInfo
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- CN115206279A CN115206279A CN202210798285.2A CN202210798285A CN115206279A CN 115206279 A CN115206279 A CN 115206279A CN 202210798285 A CN202210798285 A CN 202210798285A CN 115206279 A CN115206279 A CN 115206279A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/128—Vehicles
- G10K2210/1282—Automobiles
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/129—Vibration, e.g. instead of, or in addition to, acoustic noise
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The embodiment of the invention discloses a vehicle noise reduction processing system and method and a vehicle. The system comprises: the system comprises a first preset number of acceleration sensors, a second preset number of digital microphones, a third preset number of loudspeakers and power amplifiers; the acceleration sensor is arranged on a vehicle chassis and used for acquiring chassis vibration signals and sending the chassis vibration signals to the power amplifier through a digital audio bus; the digital microphone is arranged on the roof of the vehicle and used for acquiring the noise signal in the form of a digital signal and sending the noise signal in the vehicle to the power amplifier through the digital audio bus; the power amplifier is used for carrying out noise reduction processing on the chassis vibration signal and the noise signal in the vehicle, determining a reverse sound wave signal and sending the reverse sound wave signal to the loudspeaker; the loudspeaker is arranged on the vehicle door and used for outputting the reverse sound wave signal to neutralize the noise generated by the vibration of the chassis, so that the automatic noise reduction of the road noise can be realized.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicles, in particular to a vehicle noise reduction processing system and method and a vehicle.
Background
With the continuous development of automobile technology, the requirements of drivers and passengers in automobiles on driving environments are also continuously improved, and automobile noise is a main factor influencing the driving environments.
The automobile noise is mainly divided into engine noise, road noise, tire noise, wind noise, resonance noise and other noises. The road noise is noise generated by driving chassis vibration during vehicle running. At present, noise reduction equipment carries out noise reduction processing on engine noise more, and noise reduction processing on road noise does not exist. However, road noise is transmitted to the driving environment through tires, suspensions and vehicle body components, and the driving feeling of people in the vehicle is directly affected, and particularly the road noise influence is more obvious in a vehicle with pure electric power. There is an urgent need for a way to automatically reduce road noise.
Disclosure of Invention
The embodiment of the invention provides a vehicle noise reduction processing system and method and a vehicle, which are used for realizing automatic noise reduction of road noise, so that a quiet and comfortable in-vehicle environment is provided for a driver and passengers, and the driving experience is improved.
In a first aspect, an embodiment of the present invention provides a vehicle noise reduction processing system, where the system includes: the system comprises a first preset number of acceleration sensors, a second preset number of digital microphones, a third preset number of loudspeakers and power amplifiers;
the first preset number of acceleration sensors are arranged on a vehicle chassis and used for acquiring chassis vibration signals and sending the chassis vibration signals to the power amplifier through a digital audio bus;
the second preset number of digital microphones are arranged on the ceiling of the vehicle and used for acquiring the in-vehicle noise signals in the form of digital signals and sending the in-vehicle noise signals to the power amplifier through a digital audio bus;
the power amplifier is used for carrying out noise reduction processing on the received chassis vibration signals and the received in-vehicle noise signals, determining reverse sound wave signals and sending the reverse sound wave signals to the third preset number of loudspeakers;
the third preset number of loudspeakers are arranged on the vehicle door and used for outputting the reverse sound wave signals so as to neutralize noise generated by chassis vibration.
In a second aspect, an embodiment of the present invention further provides a vehicle noise reduction processing method, where the method includes:
acquiring chassis vibration signals based on a first preset number of acceleration sensors, and sending the chassis vibration signals to a power amplifier through a digital audio bus;
acquiring chassis vibration signals based on a second preset number of digital microphones, and sending the in-car noise signals to a power amplifier through a digital audio bus;
based on the power amplifier, carrying out noise reduction processing on the received chassis vibration signal and the noise signal in the vehicle, determining a reverse sound wave signal, and sending the reverse sound wave signal to a third preset number of loudspeakers;
and outputting the reverse sound wave signals based on the third preset number of loudspeakers so as to neutralize noise generated by chassis vibration.
In a third aspect, the embodiment of the invention further provides a vehicle, and the vehicle comprises the vehicle noise reduction processing system provided by any embodiment of the invention.
According to the technical scheme of the embodiment of the invention, a first preset number of acceleration sensors are arranged on a vehicle chassis and used for acquiring chassis vibration signals and sending the chassis vibration signals to a power amplifier through a digital audio bus; the second preset number of digital microphones are arranged on the ceiling of the vehicle and used for acquiring the in-vehicle noise signals in the form of digital signals and sending the in-vehicle noise signals to the power amplifier through the digital audio bus; the power amplifier is used for carrying out noise reduction processing on the received chassis vibration signals and the noise signals in the vehicle, determining reverse sound wave signals and sending the reverse sound wave signals to a third preset number of loudspeakers; the speaker setting of third default quantity is on the door for export reverse sound wave signal, with the noise that the chassis vibration produced, thereby realize the automatic of way making an uproar of falling, and then for driver and passenger provide quiet comfortable car internal environment, promote the driving experience.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a vehicle noise reduction processing system according to an embodiment of the present invention;
fig. 2 is an exemplary diagram of an installation location of an acceleration sensor and a digital microphone according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a vehicle noise reduction processing system according to a second embodiment of the present invention;
fig. 4 is an exemplary diagram of connection modes of a power amplifier, a digital microphone, an acceleration sensor, and a main controller according to a second embodiment of the present invention;
fig. 5 is a flowchart of a vehicle noise reduction processing method according to a third embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Fig. 1 is a schematic structural diagram of a vehicle noise reduction processing system according to an embodiment of the present invention. The vehicle noise reduction processing system provided by the embodiment can be suitable for automatically reducing the noise of the road noise in the driving process of the vehicle, and particularly can be applied to automatically reducing the noise of the road noise in an electric vehicle without engine noise. As shown in fig. 1, the vehicle noise reduction processing system may include: a first preset number of acceleration sensors 110, a second preset number of digital microphones 120, a third preset number of speakers 140, and power amplifiers 130.
The first preset number of acceleration sensors 110 are arranged on a vehicle chassis and used for acquiring chassis vibration signals and sending the chassis vibration signals to the power amplifier 130 through a digital audio bus; the second preset number of digital microphones 120 are arranged on the roof of the vehicle, and are used for acquiring the in-vehicle noise signals in the form of digital signals and sending the in-vehicle noise signals to the power amplifier 130 through the digital audio bus; the power amplifier 130 is configured to perform noise reduction processing on the received chassis vibration signal and the in-vehicle noise signal, determine a reverse sound wave signal, and send the reverse sound wave signal to a third preset number of speakers 140; a third predetermined number of speakers 140 are provided on the door for outputting reverse sound wave signals to neutralize noise generated by chassis vibration.
The first preset number, the second preset number and the third preset number can be one or more, and specific numerical values of the first preset number, the second preset number and the third preset number can be preset according to requirements of vehicle size, type and/or actual noise reduction requirements of users and the like. The acceleration sensor 110 may refer to a device for collecting an acceleration signal generated by vibration of a chassis of the vehicle. For example, the acceleration sensor 110 may be a three-axis acceleration sensor. The chassis vibration signal may refer to a signal reflecting the output of the first preset number of acceleration sensors 110, and is used to represent an acceleration signal generated by the chassis vibration. The digital microphone 120 may refer to a device for collecting an in-vehicle noise signal in the form of a digital signal. The in-vehicle noise signal may refer to a signal reflecting the output of the second preset number of digital microphones 120. The speaker 140 may emit sound based on the received reverse sound wave signal. The reverse sound wave signal may refer to a sound wave signal for signal cancellation that is opposite to the chassis vibration signal and the in-vehicle noise signal. Power amplifier 130 may refer to an amplifier that produces maximum power output to drive a load (e.g., speaker 140) at a given distortion rate, and may be used for, but is not limited to, signal processing operations and signal transmission operations. Digital Audio Bus A2B (automatic Audio Bus) refers to an Audio Bus capable of bidirectional digital signal transmission. The digital audio bus may provide a master slave node for bi-directional data transfer through devices connected by the digital audio bus. The digital audio bus is a vehicle-mounted high-bandwidth bidirectional-transmission digital audio bus adopting a daisy chain structure, can support 11 nodes (namely 10 slave nodes) at most, can set the longest distance between each node to be 15 meters, and can set the length of the whole daisy chain to be 40 meters at most.
Specifically, a first preset number of acceleration sensors 110 may be disposed on the vehicle chassis and connected to the power amplifier 130 via a digital audio bus to facilitate bidirectional fast transmission of data. A first preset number of acceleration sensors 110 may be used to acquire chassis vibration signals so that acceleration sensors 110 output digital signals that may be directly applied by power amplifier 130 for noise reduction calculations and transmit the chassis vibration signals to power amplifier 130 via a digital audio bus. A second predetermined number of digital microphones 120 may be positioned on the vehicle interior ceiling and coupled to a power amplifier 130 via a digital audio bus to facilitate bi-directional fast transfer of data. The second preset number of digital microphones 120 may be configured to collect the in-vehicle noise signals in the form of digital signals, so that the digital microphones 120 output digital signals that may be directly applied to noise reduction calculation by the power amplifier 130, and send the in-vehicle noise signals to the power amplifier 130 through the digital audio bus, so as to avoid that the signals are sent to the power amplifier 130 and then need to be used through analog-to-digital conversion, thereby improving timeliness of signal processing. The power amplifier 130 may perform noise reduction using a noise reduction processing chip. The noise reduction Processing chip may refer to a DSP (Digital Signal Processing) chip having a noise reduction algorithm. The noise reduction algorithm may be an algorithm for performing noise reduction processing according to a client requirement, and may also be used to avoid performing noise reduction processing on human voice. The power amplifier 130 may be configured to perform noise reduction processing on the received chassis vibration signal and the in-vehicle noise signal, determine a reverse sound wave signal, and send the reverse sound wave signal to a third preset number of speakers 140. A third predetermined number of speakers 140 may be provided on the vehicle door and connected to the power amplifier 130. The third preset number of speakers 140 can be used for outputting reverse sound wave signals to neutralize noise generated by chassis vibration, so that automatic noise reduction of road noise is realized, a quiet and comfortable in-vehicle environment is provided for drivers and passengers, and driving experience is improved.
According to the technical scheme of the embodiment of the invention, a first preset number of acceleration sensors are arranged on a vehicle chassis and used for acquiring chassis vibration signals and sending the chassis vibration signals to a power amplifier through a digital audio bus; the second preset number of digital microphones are arranged on the ceiling of the vehicle and used for acquiring the in-vehicle noise signals in the form of digital signals and sending the in-vehicle noise signals to the power amplifier through the digital audio bus; the power amplifier is used for carrying out noise reduction processing on the received chassis vibration signals and the in-vehicle noise signals, determining reverse sound wave signals and sending the reverse sound wave signals to a third preset number of loudspeakers; the speaker setting of third default quantity is on the door for export reverse sound wave signal, with the noise that the chassis vibration produced, thereby realize the automatic of way making an uproar of falling, and then for driver and passenger provide quiet comfortable car internal environment, promote the driving experience.
On the basis of the above technical solution, fig. 2 shows an exemplary diagram of the installation positions of the acceleration sensor and the digital microphone. Referring to fig. 2, when the first preset number of acceleration sensors 110 is 4 acceleration sensors 110, that is, the acceleration sensor 1, the acceleration sensor 2, the acceleration sensor 3, and the acceleration sensor 4, may be respectively disposed at the chassis positions where the four wheels of the vehicle are located, so as to more directly and accurately measure the vehicle tire and suspension system vibration data. When the second preset number of digital microphones 120 is 6 digital microphones 120, namely, digital microphones 1, 2, 3, 4, 5, 6, may be respectively disposed at the ceiling positions of the main driving seat, the assistant driving seat and the rear seat, and the central position of the front side of the ceiling and the central position of the rear side of the ceiling, so as to more comprehensively and accurately collect the noise signals in the vehicle.
Illustratively, a first preset number of acceleration sensors 110 may be connected in series through a digital audio bus, and the acceleration sensors 110 after being connected in series are connected with the power amplifier 130 through the digital audio bus; the second preset number of digital microphones 120 are connected in series through a digital audio bus, and the digital microphones 120 connected in series are connected to the power amplifier 130 through the digital audio bus.
Specifically, a first preset number of acceleration sensors 110 may be connected in series through a digital audio bus, and the acceleration sensors 110 after being connected in series are connected to the power amplifier 130 through the digital audio bus, at this time, the power amplifier 130 may serve as an A2B master node of each first preset number of acceleration sensors 110, and each first preset number of acceleration sensors 110 may serve as an A2B slave node of the power amplifier 130, so as to ensure that the power amplifier 130 may receive chassis vibration signals sent by each first preset number of acceleration sensors 110 at the same time. The second preset number of digital microphones 120 may be connected in series through a digital audio bus, and the digital microphones 120 connected in series are connected to the power amplifier 130 through the digital audio bus, at this time, the power amplifier 130 may serve as an A2B master node of each second preset number of digital microphones 120, and each second preset number of digital microphones 120 may serve as an A2B slave node of the power amplifier 130, so that the power amplifier 130 may receive the in-vehicle noise signals sent by each second preset number of digital microphones 120 at the same time. By the above-described line topology structure of the acceleration sensor 110 and the digital microphone 120, the weight of the wiring harness connecting the lines is reduced.
Illustratively, the power amplifier 130 includes: a noise reduction processing chip; the noise reduction processing chip is independent of the sound effect processing chip in the power amplifier 130; the power amplifier 130 is specifically configured to: and performing noise reduction processing on the received chassis vibration signal and the in-vehicle noise signal through the noise reduction processing chip, determining a reverse sound wave signal, and sending the reverse sound wave signal to a third preset number of speakers 140.
The noise reduction processing chip can be a chip with a noise reduction processing algorithm and can be used for performing noise reduction processing on the received chassis vibration signal and the noise signal in the vehicle.
It should be noted that the noise reduction algorithm has high requirements on the calculation capability and the calculation real-time performance of the noise reduction processing chip, and therefore, the noise reduction processing chip and the sound effect processing chip can be set to be independent of each other. Chassis vibration signals collected by the acceleration sensor 110 and in-vehicle noise signals collected by the digital microphone 120 do not pass through the sound effect processing chip, and are directly sent to the noise reduction processing chip in the power amplifier 130 for noise reduction processing, so that the real-time property of reverse sound waves for noise reduction can be ensured, and a better noise reduction effect is brought to a user.
Example two
Fig. 3 is a schematic structural diagram of a vehicle noise reduction processing system according to a second embodiment of the present invention. On the basis of the scheme of the embodiment, the embodiment optimizes the vehicle noise reduction processing system. As shown in fig. 3, the vehicle noise reduction processing system may further include, in addition to the first preset number of acceleration sensors 110, the second preset number of digital microphones 120, the third preset number of speakers 140, and the power amplifiers 130: a main controller 150.
Wherein the second preset number of digital microphones 120 may also be used to: collecting a user voice signal in the vehicle, and sending the user voice signal to the power amplifier 130 through a digital audio bus; the power amplifier 130 may also be used to: transmitting the user voice signal to the main controller 150 through the digital audio bus; the main controller 150 may be used to perform voice processing on the user voice signal.
The main controller 150 may be connected to the power amplifier 130 through a digital audio bus. The user voice signal may refer to a signal that the user utters voice to cause the vehicle to perform a certain function. For example, the user voice signal may be a voice input signal when a voice call is made through the vehicle. The collection frequency band supported by the digital microphone 120 can simultaneously cover the user voice demand frequency band and the preset noise reduction frequency band, so that the digital microphone 120 can be simultaneously used for the voice function and the noise reduction function.
Specifically, the second preset number of digital microphones 120 may also be configured to collect user voice signals in the vehicle, and send the user voice signals to the power amplifier 130 through the digital audio bus, so that the power amplifier 130 may send the user voice signals to the main controller 150 through the digital audio bus, and the main controller 150 may perform voice processing on the user voice signals, thereby ensuring that the digital microphones 120 may also collect and transmit the user voice signals when performing noise signal transmission in the vehicle. The digital microphone 120 is a device capable of realizing the common use of voice and noise reduction, so that the number of the digital microphone 120 can be reduced, the difficulty of arrangement and wiring of the digital microphone 120 in the vehicle is reduced, and the problem that a user cannot use a vehicle-mounted voice function in the noise reduction process of the vehicle is solved.
Illustratively, the main controller 150 serves as a master node of the digital audio bus, the power amplifier 130 and the second preset number of digital microphones 120 serve as slave nodes of the main controller 150, and the power amplifier 130 and the second preset number of digital microphones 120 are connected in series with the main controller 150.
Fig. 4 is a diagram illustrating an example of connection between a power amplifier, a digital microphone, an acceleration sensor, and a main controller. The main controller 150 may be connected to the power amplifier 130 through a digital audio bus in the manner described with reference to fig. 4. Referring to fig. 4, for the power amplifier 130, the digital microphone 120 and the main controller 150, the main controller 150 may serve as an A2B master node of the power amplifier 130 and the digital microphone 120, and the power amplifier 130 and each of the digital microphones 120 may serve as an A2B slave node of the main controller 150, so that the main controller 150 may receive signals transmitted by the power amplifier 130 and the digital microphone 120. For the power amplifier 130 and the acceleration sensor 110, the power amplifier 130 may serve as A2B master node of the acceleration sensor 110, and the acceleration sensor 110 may serve as A2B slave node of the power amplifier 130, so that the power amplifier 130 may receive the signal transmitted by the acceleration sensor 110.
According to the technical scheme of the embodiment of the invention, the user voice signals in the vehicle can be collected through the second preset number of digital microphones, and the collected user voice signals in the vehicle are sent to the power amplifier through the digital audio bus, so that the power amplifier can send the user voice signals to the main controller through the digital audio bus, the main controller can carry out voice processing on the received user voice signals, and the digital microphones can be ensured to collect and transmit the user voice signals while carrying out noise signal transmission in the vehicle. The digital microphone is a device which can realize the sharing of voice and noise reduction, thereby reducing the difficulty of arrangement and wiring of the digital microphone in the vehicle, further ensuring the problem that a user cannot use the vehicle-mounted voice function in the noise reduction process of the vehicle.
EXAMPLE III
Fig. 5 is a flowchart of a vehicle noise reduction processing method according to a third embodiment of the present invention. The vehicle noise reduction processing method provided by the embodiment can be suitable for automatically reducing the noise of the road noise in the vehicle driving process, and particularly can be applied to automatically reducing the noise of the road noise in an electric vehicle without engine noise. As shown in fig. 5, the vehicle noise reduction processing method may include:
and S510, acquiring chassis vibration signals based on a first preset number of acceleration sensors, and sending the chassis vibration signals to a power amplifier through a digital audio bus.
The first preset number may be one or more, and the specific number may be preset according to the size and type of the vehicle and/or the actual noise reduction requirement of the user, for example, 4. The acceleration sensor may refer to a device for acquiring an acceleration signal generated by vibration of a chassis of the vehicle. For example, the acceleration sensor may be a three-axis acceleration sensor. The chassis vibration signal may refer to a signal reflecting the output of a first preset number of acceleration sensors, which represents an acceleration signal generated by the chassis vibration. A power amplifier may refer to an amplifier that generates maximum power output to drive a load (e.g., a speaker) at a given distortion rate, and may be used for, but is not limited to, signal processing operations and signal transmission operations. The digital audio bus refers to an audio bus capable of bidirectional digital signal transmission. The digital audio bus may provide a master slave node for bi-directional data transfer through devices connected by the digital audio bus. The digital audio bus is a vehicle-mounted high-bandwidth bidirectional-transmission digital audio bus adopting a daisy chain structure, can support 11 nodes (namely 10 slave nodes) at most, can set the longest distance between each node to be 15 meters, and can set the length of the whole daisy chain to be 40 meters at most.
In particular, a first preset number of acceleration sensors may be provided on the vehicle chassis and connected to the power amplifier via a digital audio bus to facilitate bidirectional fast transmission of data. A first preset number of acceleration sensors may be used to acquire chassis vibration signals so that the acceleration sensors output digital signals that may be directly applied by the power amplifier for noise reduction calculations, and may send the chassis vibration signals to the power amplifier via a digital audio bus.
S520, collecting the in-car noise signals in the form of digital signals based on the second preset number of digital microphones, and sending the in-car noise signals to the power amplifier through the digital audio bus.
The second preset number may be one or more, and the specific number may be preset according to the size and type of the vehicle and/or the actual noise reduction requirement of the user, for example, 6. A digital microphone may refer to a device for acquiring an in-vehicle noise signal in the form of a digital signal. The in-vehicle noise signal may refer to a signal reflecting the output of the second preset number of digital microphones.
In particular, a second predetermined number of digital microphones may be provided on the ceiling inside the vehicle and connected to the power amplifier via a digital audio bus to facilitate bidirectional fast transmission of data. The second preset number of digital microphones can be used for collecting the in-vehicle noise signals in the form of digital signals, so that the digital microphones can output the digital signals which can be directly applied to noise reduction calculation by the power amplifier, and the in-vehicle noise signals are sent to the power amplifier through the digital audio bus, so that the signals are prevented from being used only by analog-to-digital conversion after being sent to the power amplifier, and the timeliness of signal processing is improved.
S530, based on the power amplifier, denoising the received chassis vibration signal and the received in-vehicle noise signal, determining a reverse sound wave signal, and sending the reverse sound wave signal to a third preset number of loudspeakers.
The third preset number may be one or more, and the specific number may be preset according to the size and type of the vehicle and/or the actual noise reduction requirement of the user, for example, 4. The speaker may produce sound based on the received reverse sound wave signal. The reverse sound wave signal may refer to a sound wave signal for signal cancellation that is opposite to the chassis vibration signal and the in-vehicle noise signal.
In particular, the power amplifier may utilize a noise reduction processing chip for noise reduction. The noise reduction processing chip may refer to a DSP chip with a noise reduction algorithm. The noise reduction algorithm may be an algorithm for performing noise reduction processing according to a client requirement, and may also be used to avoid performing noise reduction processing on human voice. The power amplifier can be used for carrying out noise reduction processing on the received chassis vibration signals and the received noise signals in the vehicle, determining reverse sound wave signals and sending the reverse sound wave signals to a third preset number of loudspeakers.
And S540, outputting the reverse sound wave signals based on the third preset number of the loudspeakers so as to neutralize noise generated by chassis vibration.
Specifically, a third preset number of speakers may be provided on the vehicle door and connected to the power amplifier so as to perform sound emission control of the speakers by an electrical signal. The third speaker of predetermineeing quantity can be used for exporting reverse sound wave signal to the noise that the chassis vibration produced, thereby realize the automatic of making an uproar of falling of way noise, and then for driver and passenger provide quiet comfortable car internal environment, promote the driving experience.
According to the technical scheme of the embodiment of the invention, a first preset number of acceleration sensors are arranged on a vehicle chassis and are used for acquiring chassis vibration signals and sending the chassis vibration signals to a power amplifier through a digital audio bus; the second preset number of digital microphones are arranged on the ceiling of the vehicle and used for acquiring the in-vehicle noise signals in the form of digital signals and sending the in-vehicle noise signals to the power amplifier through the digital audio bus; the power amplifier is used for carrying out noise reduction processing on the received chassis vibration signals and the in-vehicle noise signals, determining reverse sound wave signals and sending the reverse sound wave signals to a third preset number of loudspeakers; the speaker setting of third default quantity is on the door for export reverse sound wave signal, with the noise that the chassis vibration produced, thereby realize the automatic of way making an uproar of falling, and then for driver and passenger provide quiet comfortable car internal environment, promote the driving experience.
On the basis of the technical scheme, the vehicle noise reduction processing method further comprises the following steps: collecting user voice signals in the vehicle based on a second preset number of digital microphones, and sending the user voice signals to the power amplifier through a digital audio bus; based on the power amplifier, sending a user voice signal to the main controller through a digital audio bus; and carrying out voice processing on the user voice signal based on the main controller.
The main controller can be connected with the power amplifier through a digital audio bus. The user voice signal may refer to a signal that the user utters voice to cause the vehicle to perform a certain function. For example, the user voice signal may be a voice input signal when a voice call is made through the vehicle. The acquisition frequency band supported by the digital microphone can simultaneously cover the user voice demand frequency band and the preset noise reduction frequency band, so that the digital microphone can be simultaneously used for the voice function and the noise reduction function.
Specifically, the second preset number of digital microphones may also be used to collect user voice signals in the vehicle, and send the user voice signals to the power amplifier through the digital audio bus, so that the power amplifier may send the user voice signals to the main controller through the digital audio bus, and the main controller may perform voice processing on the user voice signals, thereby ensuring that the digital microphones may also collect and transmit the user voice signals when performing in-vehicle noise signal transmission. The digital microphone is a device which can realize the common use of voice and noise reduction, so that the arrangement quantity of the digital microphone can be reduced, the difficulty of arrangement and wiring of the digital microphone in a vehicle is reduced, and the problem that a user cannot use a vehicle-mounted voice function in the noise reduction process of the vehicle is solved.
Exemplarily, the S530 "performing noise reduction processing on the received chassis vibration signal and the in-vehicle noise signal based on the power amplifier, determining an inverse sound wave signal, and transmitting the inverse sound wave signal to the third preset number of speakers" may include: based on a noise reduction processing chip in the power amplifier, carrying out noise reduction processing on the received chassis vibration signal and the noise signal in the vehicle, determining a reverse sound wave signal, and sending the reverse sound wave signal to a third preset number of loudspeakers; the noise reduction processing chip is independent from the sound effect processing chip in the power amplifier.
The noise reduction processing chip can be a chip with a noise reduction processing algorithm and can be used for performing noise reduction processing on the received chassis vibration signal and the noise signal in the vehicle.
It should be noted that the noise reduction algorithm has high requirements on the calculation capability and the calculation real-time performance of the noise reduction processing chip, and therefore, the noise reduction processing chip and the sound effect processing chip can be set to be independent of each other. Chassis vibration signal that acceleration sensor gathered and the in-car noise signal that digital microphone gathered can not pass through the audio processing chip, directly send to and fall the noise processing chip in the power amplifier and carry out the noise reduction processing, can guarantee the real-time of the reverse sound wave that is used for falling the noise, bring better noise reduction effect for the user.
Example four
The fourth embodiment of the invention provides a vehicle. The vehicle is provided with a first preset number of acceleration sensors, a second preset number of digital microphones, a third preset number of loudspeakers and power amplifiers.
The system comprises a vehicle chassis, a power amplifier, a first preset number of acceleration sensors, a second preset number of acceleration sensors, a digital audio bus and a power amplifier, wherein the first preset number of acceleration sensors are arranged on the vehicle chassis and used for acquiring chassis vibration signals and sending the chassis vibration signals to the power amplifier through the digital audio bus; the second preset number of digital microphones are arranged on the ceiling of the vehicle and used for acquiring the in-vehicle noise signals in the form of digital signals and sending the in-vehicle noise signals to the power amplifier through the digital audio bus; the power amplifier is used for carrying out noise reduction processing on the received chassis vibration signals and the noise signals in the vehicle, determining reverse sound wave signals and sending the reverse sound wave signals to a third preset number of loudspeakers; and the third preset number of loudspeakers are arranged on the vehicle door and used for outputting the reverse sound wave signals so as to neutralize noise generated by chassis vibration.
According to the vehicle provided by the embodiment of the invention, a first preset number of acceleration sensors are arranged on a vehicle chassis and are used for acquiring chassis vibration signals and sending the chassis vibration signals to a power amplifier through a digital audio bus; the second preset number of digital microphones are arranged on the roof of the vehicle and are used for acquiring the in-vehicle noise signals in the form of digital signals and sending the in-vehicle noise signals to the power amplifier through the digital audio bus; the power amplifier is used for carrying out noise reduction processing on the received chassis vibration signals and the noise signals in the vehicle, determining reverse sound wave signals and sending the reverse sound wave signals to a third preset number of loudspeakers; the speaker setting of third default quantity is on the door for export reverse sound wave signal, with the noise that the chassis vibration produced, thereby realize the automatic of way making an uproar of falling, and then for driver and passenger provide quiet comfortable car internal environment, promote the driving experience.
Optionally, the first preset number of acceleration sensors is 4 acceleration sensors, which are respectively located at chassis positions where four wheels of the vehicle are located; the second preset number of digital microphones are 6 digital microphones which are respectively positioned at the positions of a ceiling where two passenger positions, namely a main driving position, a secondary driving position and a rear seat, are positioned, and the central position of the front side of the ceiling and the central position of the rear side of the ceiling.
Optionally, a first preset number of acceleration sensors are connected in series through a digital audio bus, and the acceleration sensors connected in series are connected with the power amplifier through the digital audio bus; and the second preset number of digital microphones are connected in series through a digital audio bus, and the digital microphones after being connected in series are connected with the power amplifier through the digital audio bus.
Optionally, the vehicle may further comprise: a main controller;
the second preset number of digital microphones is further configured to: collecting a user voice signal in a vehicle, and sending the user voice signal to a power amplifier through a digital audio bus;
the power amplifier is further configured to: sending the user voice signal to a main controller through a digital audio bus;
the main controller is used for: and carrying out voice processing on the user voice signal.
Optionally, the main controller is specifically configured to:
the main controller is used as a main node of a digital audio bus, the power amplifiers and the second preset number of digital microphones are used as slave nodes of the main controller, and the power amplifiers and the second preset number of digital microphones are connected with the main controller in a series connection mode.
Alternatively, the power amplifier may include: the noise reduction processing chip is independent from the sound effect processing chip in the power amplifier;
a power amplifier, in particular for: and performing noise reduction treatment on the received chassis vibration signals and the noise signals in the vehicle through a noise reduction treatment chip, determining reverse sound wave signals, and sending the reverse sound wave signals to a third preset number of loudspeakers.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A vehicle noise reduction processing system, the system comprising: the system comprises a first preset number of acceleration sensors, a second preset number of digital microphones, a third preset number of loudspeakers and power amplifiers; wherein, the first and the second end of the pipe are connected with each other,
the first preset number of acceleration sensors are arranged on a vehicle chassis and used for acquiring chassis vibration signals and sending the chassis vibration signals to the power amplifier through a digital audio bus;
the second preset number of digital microphones are arranged on the ceiling of the vehicle and used for acquiring the in-vehicle noise signals in the form of digital signals and sending the in-vehicle noise signals to the power amplifier through a digital audio bus;
the power amplifier is used for carrying out noise reduction processing on the received chassis vibration signals and the received in-vehicle noise signals, determining reverse sound wave signals and sending the reverse sound wave signals to the third preset number of loudspeakers;
the third preset number of loudspeakers are arranged on the vehicle door and used for outputting the reverse sound wave signals so as to neutralize noise generated by chassis vibration.
2. The system according to claim 1, characterized in that said first preset number of acceleration sensors is 4 acceleration sensors, each located at a chassis position where four wheels of the vehicle are located;
the second preset number of digital microphones are 6 digital microphones and are respectively positioned at the positions of a ceiling where two passenger positions, namely a main driving position, a secondary driving position and a rear seat, are positioned, and the central position of the front side of the ceiling and the central position of the rear side of the ceiling.
3. The system according to claim 1, wherein the first preset number of acceleration sensors are connected in series through a digital audio bus, and the acceleration sensors after being connected in series are connected with the power amplifier through the digital audio bus;
and the second preset number of digital microphones are connected in series through a digital audio bus, and the digital microphones after being connected in series are connected with the power amplifier through the digital audio bus.
4. The system of claim 1, further comprising: a main controller;
the second preset number of digital microphones is further configured to: collecting a user voice signal in a vehicle, and sending the user voice signal to the power amplifier through a digital audio bus;
the power amplifier is further configured to: sending the user voice signal to the main controller through a digital audio bus;
the main controller is used for carrying out voice processing on the user voice signal.
5. The system of claim 4, wherein the master controller acts as a master node for a digital audio bus, the power amplifier and the second predetermined number of digital microphones act as slave nodes for the master controller, and the power amplifier and the second predetermined number of digital microphones are connected in series with the master controller.
6. The system of claim 1, wherein the power amplifier comprises: the noise reduction processing chip is independent from the sound effect processing chip in the power amplifier;
the power amplifier is specifically configured to: and denoising the received chassis vibration signal and the received in-vehicle noise signal through the denoising processing chip, determining a reverse sound wave signal, and sending the reverse sound wave signal to the third preset number of loudspeakers.
7. A vehicle noise reduction processing method, characterized by comprising:
acquiring chassis vibration signals based on a first preset number of acceleration sensors, and sending the chassis vibration signals to a power amplifier through a digital audio bus;
acquiring an in-car noise signal in a digital signal form based on a second preset number of digital microphones, and sending the in-car noise signal to a power amplifier through a digital audio bus;
based on the power amplifier, carrying out noise reduction processing on the received chassis vibration signal and the noise signal in the vehicle, determining a reverse sound wave signal, and sending the reverse sound wave signal to a third preset number of loudspeakers;
and outputting the reverse sound wave signals based on the third preset number of loudspeakers so as to neutralize noise generated by chassis vibration.
8. The method of claim 7, further comprising:
collecting user voice signals in a vehicle based on the second preset number of digital microphones, and sending the user voice signals to the power amplifier through a digital audio bus;
based on the power amplifier, sending the user voice signal to a main controller through a digital audio bus;
and based on the main controller, carrying out voice processing on the user voice signal.
9. The method of claim 7, wherein the denoising the received chassis vibration signal and the in-vehicle noise signal based on the power amplifier, determining a counter sound wave signal, and sending the counter sound wave signal to a third preset number of speakers comprises:
based on a noise reduction processing chip in the power amplifier, carrying out noise reduction processing on the received chassis vibration signal and the noise signal in the vehicle, determining a reverse sound wave signal, and sending the reverse sound wave signal to a third preset number of loudspeakers;
the noise reduction processing chip is independent from the sound effect processing chip in the power amplifier.
10. A vehicle, characterized in that the vehicle comprises a vehicle noise reduction processing system according to any one of claims 1-6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210798285.2A CN115206279A (en) | 2022-07-06 | 2022-07-06 | Vehicle noise reduction processing system and method and vehicle |
| PCT/CN2023/099050 WO2024007811A1 (en) | 2022-07-06 | 2023-06-08 | Vehicle noise reduction processing system and method, and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210798285.2A CN115206279A (en) | 2022-07-06 | 2022-07-06 | Vehicle noise reduction processing system and method and vehicle |
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| WO (1) | WO2024007811A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024007811A1 (en) * | 2022-07-06 | 2024-01-11 | 中国第一汽车股份有限公司 | Vehicle noise reduction processing system and method, and vehicle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2748626B2 (en) * | 1989-12-29 | 1998-05-13 | 日産自動車株式会社 | Active noise control device |
| CN211543441U (en) * | 2019-08-22 | 2020-09-22 | 湖北亿咖通科技有限公司 | Active noise reduction system with low-delay interface |
| CN111739504A (en) * | 2020-05-29 | 2020-10-02 | 长城汽车股份有限公司 | Microphone system, control method and vehicle |
| CN112509546B (en) * | 2020-10-22 | 2023-06-20 | 上海迪彼电子科技有限公司 | Active noise reduction system for dynamic change sound field of automobile |
| CN113689842A (en) * | 2021-08-20 | 2021-11-23 | 浙江吉利控股集团有限公司 | Integrated system for active noise reduction and audio power amplification of automobile |
| CN115206279A (en) * | 2022-07-06 | 2022-10-18 | 中国第一汽车股份有限公司 | Vehicle noise reduction processing system and method and vehicle |
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2022
- 2022-07-06 CN CN202210798285.2A patent/CN115206279A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024007811A1 (en) * | 2022-07-06 | 2024-01-11 | 中国第一汽车股份有限公司 | Vehicle noise reduction processing system and method, and vehicle |
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