CN114523923A - New forms of energy electric automobile's sound management system - Google Patents
New forms of energy electric automobile's sound management system Download PDFInfo
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Abstract
The invention discloses a sound management system of a new energy electric automobile, which comprises: the entertainment sound module is used for receiving six paths of balanced audio signals; the active sounding module is used for reading vehicle data information through the CAN transceiver chip; the active noise reduction module is used for receiving an error microphone signal arranged on a vehicle roof or a preset position and an acceleration sensor signal arranged on a vehicle chassis suspension; and the sound active control module is used for tuning the six paths of balanced audio signals to obtain entertainment audio, processing vehicle data information to synthesize engine order sound, performing noise reduction processing on an acceleration sensor signal of the error microphone signal by using a filtering reference LMS algorithm to obtain a secondary signal, and outputting the entertainment audio, the engine order sound and the secondary signal to a loudspeaker system respectively. The system provides a quieter and more comfortable space in the vehicle, and improves the comfort level and satisfaction degree of drivers and passengers.
Description
Technical Field
The invention relates to the technical field of new energy electric automobiles, in particular to a sound management system of a new energy electric automobile integrating entertainment music, active sounding and active noise reduction.
Background
The trend of new energy electric vehicles is that the traditional fuel oil engine is converted into the motor, so that the sound of the engine is reduced, and the pleasure of a driver in the driving process is reduced although the vehicle is quieter; and the electric automobile can generate some uncomfortable noises due to the work of the motor during running.
The current active sounding technology is more mature in research, and is applied to new energy electric automobiles, engine sound waves in the driving process of a fuel automobile are simulated through a loudspeaker of an in-automobile entertainment system, so that drivers can feel like the motion sense and the comfort sense of the traditional fuel automobile and the order sense during gear shifting, and the driving pleasure of the electric automobiles is improved; and can well cover the noise that is caused by the work of the motor. On the other hand, people need a silent sound field environment in the electric vehicle in other driving scenes, and need to control noise in the electric vehicle. The interior sound of the electric automobile mainly comprises motor noise, road noise and wind noise, and the current interior control methods are divided into two types of passive noise control and active noise control. The passive noise control method achieves the purposes of sound insulation and sound absorption by adding extra acoustic materials on the vehicle, but the control effect on low-frequency noise is not ideal due to the long wavelength of the low-frequency noise, and the development trend of vehicle light weight is not facilitated.
The active noise control method outputs a secondary sound signal which has the same amplitude as the original noise and has a phase difference of 180 degrees through a vehicle door loudspeaker, and the secondary sound signal is superposed with the original noise at an error microphone to realize the noise reduction control effect. Due to the physical characteristics of noise in the vehicle, the active control method has a good control effect on low-frequency noise, is not easy to reduce the low-frequency noise, is just a supplement of a passive control method, does not need to add extra components, and accords with the development trend of light weight of the vehicle, so that the active control method is more and more applied to the vehicle. However, when an existing car manufacturer develops a sound management system in an electric car, an integrated active sound production system or a road noise active noise reduction system is often selected on the basis of in-car entertainment sound, and only one of 'driving pleasure with moving feeling' or 'extremely silent experience' of passengers in the car can be met, and the sound field requirement in the car changing at any moment is not taken into account.
Disclosure of Invention
The application provides a sound management system of a new energy electric automobile, which aims to solve the technical problems that the existing sound management method only meets one of 'driving pleasure rich in movement feeling' or 'extremely silent experience' of passengers in an automobile, and does not take care of the sound field requirement in the automobile changing at any time.
An embodiment of a first aspect of the present application provides a sound management system of a new energy electric vehicle, including: the system comprises an entertainment tone module, an active sounding module, an active noise reduction module and a sound active control module, wherein the entertainment tone module is used for receiving six paths of balanced audio signals and transmitting the six paths of balanced audio signals to the sound active control module; the active sounding module is used for reading vehicle data information through the CAN transceiver chip and transmitting the vehicle data information to the active sound control module; the active noise reduction module is used for receiving an error microphone signal arranged on a vehicle roof or a preset position and an acceleration sensor signal arranged on a vehicle chassis suspension and transmitting the signals to the sound active control module; the sound active control module is used for tuning the six paths of balanced audio signals to obtain entertainment audio and outputting the entertainment audio to a loudspeaker system; the system is also used for processing the vehicle data information to calculate an engine rotating speed value, synthesizing the engine rotating speed value into engine order sound and outputting the engine order sound to a loudspeaker system; and the system is also used for carrying out noise reduction processing on the error microphone signal and the acceleration sensor signal by using a filtering reference LMS algorithm to obtain a secondary signal, and outputting the secondary signal to a loudspeaker system.
Further, in one embodiment of the present invention, the sound active control module includes a first digital signal processor, a second digital signal processor, and a third digital signal processor.
Further, in an embodiment of the present invention, the entertainment tone module is specifically configured to: the system comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring a multi-channel audio signal of a vehicle host; and the first conversion unit is used for balanced inputting the multi-channel audio signals into the first A/D converter, converting the multi-channel audio signals into six paths of balanced audio signals and outputting the six paths of balanced audio signals to the first digital signal processor of the sound active control module in a TDM format.
Further, in an embodiment of the present invention, when the sound active control module receives the six paths of balanced audio signals, the first digital signal processor performs sound effect tuning on the six paths of balanced audio signals, outputs the six paths of balanced audio signals to the second digital signal processor in a TDM format, performs digital audio mixing processing by using the second digital signal processor, obtains the entertainment audio, and allocates channels of a speaker system.
Further, in an embodiment of the present invention, the active sound generation module is specifically configured to: the second acquisition unit is used for connecting the CAN transceiver chip with a vehicle OBD interface, acquiring the vehicle data information and transmitting the vehicle data information to the MCU; and the transmission unit is used for outputting the motor rotating speed or the vehicle speed in the vehicle data information to the first digital signal processor of the active sound production module by utilizing the micro control unit MCU in a UART transmission mode, and outputting other vehicle data information to the second digital signal processor of the active sound production module.
Further, in an embodiment of the present invention, when the sound active control module receives the vehicle data information, the sound active control module performs active sound processing on the motor speed or the vehicle speed in the first digital signal processor, and outputs the processed information to a second digital signal processor in a TDM format, and the second digital signal processor performs digital audio mixing processing on the engine speed value and the other vehicle data to obtain the engine order sound, and allocates channels of a speaker system.
Further, in an embodiment of the present invention, the active noise reduction module is specifically configured to:
and converting the error microphone signal and the acceleration sensor signal into an error microphone digital signal and an acceleration sensor digital signal through a second A/D converter and a third A/D converter respectively, and outputting the error microphone digital signal and the acceleration sensor digital signal to a second digital signal processor and a third data signal processor of the active sound production module.
Further, in an embodiment of the present invention, when the sound active control module receives the error microphone digital signal and the acceleration sensor digital signal, the sound active control module performs active noise reduction processing on the error microphone digital signal, and outputs the acceleration sensor digital signal to a third data signal processor to be converted into a TDM data transmission format, and then transmits the TDM data transmission format to a second digital signal processor; and carrying out digital audio mixing processing by the second digital signal processor to obtain the engine order sound and distributing channels of a loudspeaker system.
An embodiment of a second aspect of the present application provides a vehicle, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions configured to implement the sound management system of the new energy electric vehicle according to the above embodiment.
In a third aspect of the present application, a computer-readable storage medium is provided, where the computer-readable storage medium stores computer instructions for causing the computer to execute the sound management system of the new energy electric vehicle according to the foregoing embodiment.
The technical scheme of the invention at least realizes the following beneficial technical effects:
by accurately evaluating the operation space and calculation power occupied by each algorithm, the algorithm processing is respectively put into two DSP chips for operation, and the operation structure and sequence of the algorithms are reasonably arranged, so that the calculation power utilization rate of the chips is optimized, the integrated calculation efficiency of the system is improved, the integrated development cost is reduced as far as possible on the premise of ensuring the realization of functions, and simultaneously, drivers and passengers can realize extreme acoustic quality under different driving scene requirements, the tone quality level of vehicles is improved, and the value and the quality of the vehicles are improved; in addition, the model selection scheme of the main components enables the system to be closer to mass production and engineering, and improves the feasibility and application scene of the system. Therefore, the technical problem that the existing sound management scheme only meets one of 'driving pleasure rich in moving feeling' or 'extremely silent experience' of passengers in the vehicle and does not take care of sound field requirements in the vehicle which change at any moment is solved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a sound management system of a new energy electric vehicle according to an embodiment of the present invention;
FIG. 2 is a block diagram of a sound management system controller provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of an implementation of an entertainment sound module provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of an implementation of an active sound module according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an implementation of an active noise reduction module according to an embodiment of the present invention;
FIG. 6 is a simplified block diagram (discrete domain) of an adaptive noise active control feedforward system provided by an embodiment of the present invention;
FIG. 7 is a schematic diagram of the integration of a sound management system provided by an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a sound management system of a new energy electric vehicle according to an embodiment of the present invention with reference to the drawings. Aiming at the problem that the existing sound management scheme mentioned in the background technology only meets one of 'driving pleasure rich in moving sense' or 'extreme silent experience' of passengers in a vehicle and does not take care of sound field requirements in the vehicle which change constantly, the invention provides a sound management system of a new energy electric vehicle. Thereby, the above technical problem is solved.
Specifically, fig. 1 is a schematic structural diagram of a sound management system of a new energy electric vehicle according to an embodiment of the present invention.
As shown in fig. 1, the sound management system 10 of the new energy electric vehicle includes: an entertainment sound module 100, an active sound generation module 200, an active noise reduction module 300, and an active sound control module 400.
The entertainment sound module 100 is configured to receive six balanced audio signals and transmit the six balanced audio signals to the sound active control module. And the active sounding module 200 is used for reading the vehicle data information through the CAN transceiver chip and transmitting the vehicle data information to the active sound control module. And the active noise reduction module 300 is used for receiving an error microphone signal arranged on a vehicle roof or a preset position and an acceleration sensor signal arranged on a vehicle chassis suspension and transmitting the signals to the sound active control module. The sound active control module 400 is used for tuning the six paths of balanced audio signals to obtain entertainment audio and outputting the entertainment audio to the loudspeaker system; the system is also used for processing the vehicle data information to calculate an engine rotating speed value, synthesizing the engine rotating speed value into engine order sound and outputting the engine order sound to a loudspeaker system; and the system is also used for carrying out noise reduction processing on the error microphone signal and the acceleration sensor signal by using a filtering reference LMS algorithm to obtain a secondary signal, and outputting the secondary signal to a loudspeaker system.
Optionally, the sound active control module 400 according to the embodiment of the present invention may include a first digital signal processor DSP1, a second digital signal processor DSP2, and a third digital signal processor DSP 3.
In some embodiments, as shown in fig. 2, the entertainment sound module 100 in the embodiment of the present invention is specifically configured to: the system comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring a multi-channel audio signal of a vehicle host; and the first conversion unit is used for balanced inputting the multi-channel audio signals into the first A/D converter ADC1, converting the multi-channel audio signals into six paths of balanced audio signals and outputting the six paths of balanced audio signals to the first digital signal processor DSP1 of the sound active control module in a TDM format. Further, when the sound active control module 400 receives the six balanced audio signals, the first digital signal processor DSP1 is used to perform sound effect tuning on the six balanced audio signals, and outputs the sound effect tuning to the second digital signal processor DSP2 in TDM format, and the second digital signal processor DSP2 is used to perform digital audio mixing processing, so as to obtain entertainment audio, and allocate channels of the speaker system.
That is, as shown in fig. 3, the specific working process of the entertainment sound module 100 is to access analog differential signals (i.e. multi-channel audio signals) output by the host, convert the multi-channel audio signals into six-channel balanced audio signals by the ADC1 in a balanced input mode, output the six-channel balanced audio signals to the DSP1 in a TDM format, perform audio algorithm processing in the DSP1, output the audio algorithm output to the DSP2 in a TDM format, perform digital audio mixing processing by the DSP2, output the processed audio signals to the vehicle speaker system, and output the entertainment audio signals to the door speakers, the tweeters, the center speakers, the surround speakers, and the subwoofer, respectively.
In some embodiments, as shown in fig. 2, the active sound module 200 in the embodiment of the present invention is specifically configured to: the second acquisition unit is used for connecting the CAN transceiver chip with a vehicle OBD interface, acquiring vehicle data information and transmitting the vehicle data information to the MCU; and the transmission unit is used for outputting the motor rotating speed or the vehicle speed in the vehicle data information to the first digital signal processor DSP1 of the active sound-generating module 400 in a UART transmission mode by using the micro control unit MCU, and outputting other vehicle data information to the second digital signal processor DSP2 of the active sound-generating module 400.
Further, when the sound active control module 400 receives the vehicle data information, the first digital signal processor DSP1 performs active sound processing on the motor speed or the vehicle speed, and outputs the processed data to the second digital signal processor DSP2 in a TDM format, and the second digital signal processor DSP2 performs digital audio mixing processing on the engine speed value and other vehicle data to obtain the engine order sound, and allocates channels of the speaker system.
The control method for realizing active sound production on the new energy electric automobile comprises the steps of calculating a corresponding engine rotating speed value according to the motor rotating speed or the vehicle speed of the current electric automobile, and synthesizing engine order sound (a sum of a fundamental frequency value and a harmonic frequency value) according to the calculated engine rotating speed value.
The method for calculating the rotating speed of the engine according to the vehicle speed comprises the following steps:
nvisual＝A×V+nI (1)
wherein n isvisualIs the virtual engine speed to be calculated, and V is the current vehicle speed; assuming that the maximum sounding vehicle speed set by the active sounding system is 140km/h, the unit vehicle speed virtual engine speed variation A:
A＝(nR-nI)/140 (2)
wherein n isRFor a virtual engine rated speed, nIVirtual engine idle speed.
The method for calculating the virtual engine speed according to the electric vehicle motor speed comprises the following steps:
nvisual＝B×nM+nI (3)
in the formula, nvisualIs the virtual engine speed to be calculated, B is the unit motor speed virtual engine speed variation, nIVirtual engine idle speed. And has:
B＝(nR-nI)/140 (4)
when the engine speed is neCorresponding to the engine speed 0.5 order frequency as the engine sound fundamental frequency at the engine speed, has
f1＝ne/(2×60) (5)
So that the corresponding p-th harmonic frequency f at the engine speedpComprises the following steps:
fp＝ne×p/(2×60) (6)
in combination with the above, the engine order sound calculation method may be expressed as:
wherein, X (n)e) For engine speed neThe corresponding order of the sounds, ApIs the instantaneous amplitude, phi, of the p-th engine order component soundpIs the instantaneous phase of the p-th engine order component sound, p is the number of effective engine order components.
That is, as shown in fig. 4, the specific process of the active sound module 200 is as follows: the OBD interface is connected with the CAN transceiver chip, relevant information such as motor rotating speed, vehicle speed and torque is read from the CAN transceiver chip of the vehicle, relevant data information of the vehicle is obtained through processing and is transmitted to the MCU, the MCU processes the relevant information and outputs important information such as the motor rotating speed to the DSP1 through a UART transmission mode, active sound production algorithm processing is carried out in the DSP1, then the important information is output to the DSP2 in a TDM format, digital audio mixing processing is carried out by the DSP2 to obtain engine order sound, the engine order sound is output to a speaker system on the vehicle, entertainment audio is respectively sent to a vehicle door speaker, a high pitch speaker, a surround speaker and a subwoofer, so that the engine sound in the driving process of the fuel automobile is simulated, and the driver is provided with the feeling of wave movement, comfort and order feeling during gear shifting like the traditional fuel automobile.
It can be understood that the active noise reduction technology outputs a secondary sound signal with the same amplitude and 180 ° phase difference with the original noise through the vehicle door loudspeaker, and the secondary sound signal is superimposed with the original noise at the error microphone to realize the control effect of noise reduction.
In some embodiments, as shown in fig. 2, the new energy electric vehicle has no engine noise, so the active noise reduction module 300 in the embodiment of the present invention is applied to road noise, specifically: the error microphone signal and the acceleration sensor signal are converted into an error microphone digital signal and an acceleration sensor digital signal through the second a/D converter ADC2 and the third a/D converter ADC3, and then output to the second digital signal processor DSP2 and the third digital signal processor DSP3 of the active sound generation module.
Further, when the sound active control module 400 receives the error microphone digital signal and the acceleration sensor digital signal, the sound active control module performs active noise reduction processing on the error microphone digital signal, and outputs the acceleration sensor digital signal to the third data signal processor to be converted into a TDM data transmission format, and then transmits the TDM data transmission format to the second digital signal processor DSP 2; the second digital signal processor DSP2 performs digital audio mixing processing to obtain engine order sounds and to assign channels to the speaker system.
The method for actively reducing the noise of the road noise on the new energy electric automobile comprises the following steps:
order to
Hr(ω)＝Hpr(ω)Mr(ω)N1(ω)
Hp(ω)＝Hpe(ω)Me(ω)
Hs(ω)＝Hse(ω)Ls(ω)Me(ω)N2(ω) (8)
In the formula, transfer function Hr(ω)、Hp(omega) and HsThe paths denoted by (ω) are referred to as reference path, primary path and secondary path, respectively, and their impulse responses are hr(t)、hp(t) and hs(t) of (d). The adaptive active control system is realized by using a digital system, and the system block diagram is converted into a discrete domain for analyzing problems conveniently, as shown in FIG. 5, the paths are respectively changed into Hr(z)、Hp(z) and Hs(z) corresponding to impulse responses hr(n)、hp(n) and hs(n)。
As can be seen from FIG. 5, the secondary signal s (n) at the position of the error sensor has the following relationship,
s(n)＝y(n)*hs(n) (9)
where s (n) is the response of the output y (n) of the adaptive filter after passing through the secondary path, and is the "cancellation signal" at the error sensor location. The output of the adaptive filter may be calculated from a reference signal,
finishing to obtain:
where r (n) is the filtered-x signal, r (n) is the filtered-reference signal vector, having
r(n)＝[r(n),r(n-1),r(n-2),L,r(n-L+1)]T (12)
The filtered reference signal vector is obtained by convolving the reference signal vector with the secondary path,
r(n)＝X(n)*hs(n) (13)
thus, the residual error signal at the error sensor location can be expressed as
e(n)＝d(n)+s(n)＝d(n)+RT(n)W(n) (14)
Similar to the method of deriving mean square error gradient, there are
Therefore, an iterative formula of the weight vector of the adaptive filter is obtained as shown in the following formula,
W(n+1)＝W(n)+2μe(n)r(n) (16)
the method for deriving the self-adaptive filter weight vector iterative formula by considering the influence of the secondary path is a filtering reference LMS algorithm, and the active control of the road noise is realized by applying the filtering reference LMS algorithm.
That is, as shown in fig. 6, the specific process of the sound active control module 400 is as follows: an error microphone signal disposed in the ceiling or other location of the vehicle and an acceleration sensor signal disposed on the vehicle chassis suspension are acquired, the microphone input and the acceleration sensor input convert analog signals into digital signals through the ADC2 and the ADC3, respectively, and then these inputs are fed to the DSP2 for active noise reduction algorithm processing, wherein the DSP3 converts data primarily into a TDM data transmission format. The DSP2 performs mixing processing and channel allocation, converts the signals into analog output signals by a DAC, and outputs differential output signals to drive speakers. In the active noise reduction process of the road noise, all speakers of an entertainment sound system are not used, and because the frequency of the road noise is generally within 300Hz, 4 vehicle door speakers are used as secondary speakers for the active noise reduction of the road noise to produce sound.
For example, as shown in table 1 below, the MCU in the embodiment of the present invention is responsible for logic control, and communicating with each chip and reading and writing data through the I2C UART SPI. In an active sound production and noise reduction system, external CAN information needs to be collected by communicating with a CAN transceiver chip and used as an input parameter of an algorithm. Wherein, the MCU can select MPC5604B, conform to the embedded PowerArchitecture category including instruction set enhancement function, allow variable length coding for code size coverage area reduction, have optional mixed 16-bit coding and 32-bit instruction, can realize significantly reducing the code size occupation space, the flash memory supports at most 512KB on-chip code flash memory controller and ECC; the A/D converter can acquire 6 paths of differential signals and 8 paths of microphone input signals by using AK5538 of AKM, can adopt AK5538VN for 32-bit and 768kHz sampling of a digital audio system, and realizes a dynamic range of 111dB and S/(N + D) of 103dB while keeping low power consumption performance; the D/a converter, employing ADAU1966A, is a high performance, single chip digital-to-analog converter (DAC) with 16 DACs built to provide differential or single ended output, employing the ADI multi-bit sigma delta patent architecture, which has a Serial Peripheral Interface (SPI)/I2C port with which the microcontroller can adjust volume and many other parameters.
TABLE 1 selection of major Components in Sound management System of New energy electric vehicle
Further, as shown in fig. 7, in an embodiment of the present invention, the method further includes: the power amplification module is used for amplifying the entertainment audio, the engine order sound and the secondary signal and then outputting the amplified signals to the loudspeaker system, and the automobile battery respectively supplies power to the host and the power amplification module. According to the sound management system of the new energy electric automobile provided by the embodiment of the invention, the operation space and the calculation power occupied by each algorithm are accurately evaluated, the algorithm processing is respectively put into two DSP chips for operation, and the operation structure and the sequence of the algorithms are reasonably arranged, so that the calculation power utilization rate of the chips is optimized, the integrated calculation efficiency of the system is improved, the integrated development cost is reduced as far as possible on the premise of ensuring the realization of the functions, meanwhile, the drivers and passengers can realize extreme acoustic quality under different driving scene requirements, the sound quality level of the vehicle is improved, and the value and the quality of the vehicle are improved; the model selection scheme of the main components enables the system to be closer to mass production and engineering, and improves the feasibility and application scene of the system.
Fig. 8 is a schematic structural diagram of a vehicle according to an embodiment of the present application. The electronic device may include:
a memory 801, a processor 802, and a computer program stored on the memory 801 and executable on the processor 802.
The processor 802 executes the program to implement the sound management system of the new energy electric vehicle provided in the above-described embodiment.
Further, the vehicle further includes:
a communication interface 803 for communicating between the memory 801 and the processor 802.
A memory 801 for storing computer programs operable on the processor 802.
The memory 801 may include high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
If the memory 801, the processor 802 and the communication interface 803 are implemented independently, the communication interface 803, the memory 801 and the processor 802 may be connected to each other via a bus and communicate with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.
Optionally, in a specific implementation, if the memory 801, the processor 802, and the communication interface 803 are integrated on one chip, the memory 801, the processor 802, and the communication interface 803 may complete communication with each other through an internal interface.
The processor 802 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.
The embodiment also provides a computer readable storage medium, on which a computer program is stored, wherein the program is used for realizing the sound management system of the new energy electric vehicle when being executed by the processor.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a new forms of energy electric automobile's sound management system which characterized in that includes: an entertainment sound module, an active sound production module, an active noise reduction module and a sound active control module, wherein,
the entertainment sound module is used for receiving six paths of balanced audio signals and transmitting the six paths of balanced audio signals to the sound active control module;
the active sounding module is used for reading vehicle data information through the CAN transceiver chip and transmitting the vehicle data information to the active sound control module;
the active noise reduction module is used for receiving an error microphone signal arranged on a vehicle roof or a preset position and an acceleration sensor signal arranged on a vehicle chassis suspension and transmitting the signals to the sound active control module;
the sound active control module is used for tuning the six paths of balanced audio signals to obtain entertainment audio and outputting the entertainment audio to a loudspeaker system; the system is also used for processing the vehicle data information to calculate an engine rotating speed value, synthesizing the engine rotating speed value into engine order sound and outputting the engine order sound to a loudspeaker system; and the system is also used for carrying out noise reduction processing on the error microphone signal and the acceleration sensor signal by using a filtering reference LMS algorithm to obtain a secondary signal, and outputting the secondary signal to a loudspeaker system.
2. The sound management system of the new energy electric vehicle as claimed in claim 1, wherein the sound active control module comprises a first digital signal processor, a second digital signal processor and a third digital signal processor.
3. The sound management system of the new energy electric vehicle as claimed in claim 1, wherein the entertainment tone module is specifically configured to:
the system comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring a multi-channel audio signal of a vehicle host;
and the first conversion unit is used for balanced inputting the multi-channel audio signals into the first A/D converter, converting the multi-channel audio signals into six paths of balanced audio signals and outputting the six paths of balanced audio signals to the first digital signal processor of the sound active control module in a TDM format.
4. The sound management system of the new energy electric vehicle as claimed in claim 3, wherein when the sound active control module receives the six paths of balanced audio signals, the first digital signal processor is used to perform sound effect tuning on the six paths of balanced audio signals, the six paths of balanced audio signals are output to the second digital signal processor in a TDM format, the second digital signal processor is used to perform digital audio mixing processing, the entertainment audio is obtained, and channels of a speaker system are allocated.
5. The sound management system of the new energy electric vehicle according to claim 1, wherein the active sound generation module is specifically configured to:
the second acquisition unit is used for connecting the CAN transceiver chip with a vehicle OBD interface, acquiring the vehicle data information and transmitting the vehicle data information to the MCU;
and the transmission unit is used for outputting the motor rotating speed or the vehicle speed in the vehicle data information to the first digital signal processor of the active sound production module by utilizing the micro control unit MCU in a UART transmission mode, and outputting other vehicle data information to the second digital signal processor of the active sound production module.
6. The sound management system of the new energy electric vehicle as claimed in claim 5, wherein when the sound active control module receives the vehicle data information, the first digital signal processor performs active sound processing on the motor speed or the vehicle speed, and outputs the processed sound to the second digital signal processor in a TDM format, and the second digital signal processor performs digital audio mixing processing on the engine speed value and the other vehicle data to obtain the engine order sound, and allocates channels of a speaker system.
7. The sound management system of the new energy electric vehicle according to claim 1, wherein the active noise reduction module is specifically configured to:
and converting the error microphone signal and the acceleration sensor signal into an error microphone digital signal and an acceleration sensor digital signal through a second A/D converter and a third A/D converter respectively, and outputting the error microphone digital signal and the acceleration sensor digital signal to a second digital signal processor and a third data signal processor of the active sound production module.
8. The sound management system of the new energy electric vehicle according to claim 7, wherein when the sound active control module receives the error microphone digital signal and the acceleration sensor digital signal, the sound active control module performs active noise reduction on the error microphone digital signal, and outputs the acceleration sensor digital signal to a third data signal processor to be converted into a TDM data transmission format, and then transmits the TDM data transmission format to a second digital signal processor; and carrying out digital audio mixing processing by the second digital signal processor to obtain the engine order sound and distributing channels of a loudspeaker system.
9. A vehicle, characterized by comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the sound management system of the new energy electric vehicle according to any one of claims 1 to 8.
10. A computer-readable storage medium on which a computer program is stored, the program being executed by a processor for implementing the sound management system of the new energy electric vehicle according to any one of claims 1 to 8.
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