CN108312959A - A kind of electric vehicle sound caution system - Google Patents
A kind of electric vehicle sound caution system Download PDFInfo
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- CN108312959A CN108312959A CN201810154700.4A CN201810154700A CN108312959A CN 108312959 A CN108312959 A CN 108312959A CN 201810154700 A CN201810154700 A CN 201810154700A CN 108312959 A CN108312959 A CN 108312959A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q5/00—Arrangement or adaptation of acoustic signal devices
- B60Q5/005—Arrangement or adaptation of acoustic signal devices automatically actuated
- B60Q5/008—Arrangement or adaptation of acoustic signal devices automatically actuated for signaling silent vehicles, e.g. for warning that a hybrid or electric vehicle is approaching
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Abstract
The application provides a kind of electric vehicle sound caution system, the system comprises：Signal acquiring unit is communicated with the CAN bus of electric vehicle；Engine speed data generation unit is communicated with the signal acquiring unit；Signal fitting unit is communicated with the engine speed data generation unit；Power amplification unit, input terminal and the signal fitting unit communication；Loudspeaker unit, including headstock loud speaker, it is arranged on the head of the automobile, it is connect with the output end of the power amplification unit, for generating engine sound corresponding with the engine sound signal, further includes tailstock loud speaker, be arranged in the tail portion of the automobile, it is connect with the output end of the power amplification unit, for generating exhaust outlet sound corresponding with the exhaust tail voice sound signal.Using each embodiment of the application, the warning effect of electric vehicle sound warning can effectively improve.
Description
Technical field
This application involves electric vehicle engineering field, more particularly to a kind of electric vehicle sound caution system.
Background technology
In today that auto industry flourishes, internal-combustion engine vehicle carbon emission causes the height weight of various countries worldwide
Depending on.To reduce carbon emission, American-European and China vigorously advocates the popularization of new-energy automobile especially electric vehicle in recent years.Electronic vapour
The volume of production and marketing of vehicle is being increased with double-digit rate every year.
But electric vehicle and oil-electric vehicle, it is usually transported with pure power mode when starting and running at a low speed
Row, the noise of motor are much smaller than conventional engines, and tire is made an uproar also very small with wind also magnitude of making an uproar.So that electric vehicle is expert at
Meeting " extremely quiet " during sailing, the noise intensity sent out be not easy to cause in front of pedestrian's note that thus causing larger
Traffic safety hidden danger, traffic accident may therefore occur.Europe, the U.S., China, Japan and other countries are in development new energy vapour
Vehicle appreciates the seriousness of the problem simultaneously, promulgates relevant law, standard successively.China's automobile industry standard provides pure electricity
Electrical automobile must send out prompt tone prompt pedestrian with pedestrains safety around ensureing when driving below 30KM/H speed.
In the prior art, it is warned for the electric vehicle sound of pedestrian, typically by sending out single-frequency prompt tone or broadcasting
The audio recorded is put, to achieve the purpose that pedestrian, these sound warning ways is warned to also play certain effect.But
It is that single-frequency prompt tone or audio are all difficult that pedestrian is made clearly to judge to come the traveling-position of vehicle and speed speed.In addition, due to
Human ear is binaural system and has the function of subjective memory to the noise of traditional combustion engine automobile, and prompt tone or audio file are very
Difficulty makes pedestrian recognize that this is the sound of automobile.Therefore, sound warning way in the prior art still can not be warned preferably
Pedestrian, warning validity are still to be improved.
Invention content
The purpose of the embodiment of the present application is to provide a kind of electric vehicle sound caution system, is connect with being simulated for electric vehicle
The warning sound of nearly traditional combustion engine automobile noise, so that pedestrian's human ear can identify electric vehicle according to warning sound, and
The approximate location and travel speed that electric vehicle can be judged according to warning sound effectively improve the warning effect of sound warning
Fruit.
The embodiment of the present application provides what a kind of electric vehicle sound caution system was realized in：
A kind of electric vehicle sound caution system, the system comprises：
Signal acquiring unit is communicated with the CAN bus of electric vehicle, for obtain in real time the automobile vehicle speed data and
The motor speed data of the automobile；
Engine speed data generation unit is communicated with the signal acquiring unit, in real time by the vehicle speed data
It is synthesized with the motor speed data operation, obtains engine speed data；
Signal fitting unit is communicated with the engine speed data generation unit, for according to pre-selected pattern, utilizing
The engine speed data, fitting obtain virtual engine noise signal, and fitting obtains virtual exhaust tail mouth noise letter
Number；
Power amplification unit, input terminal and the signal fitting unit communication, for the virtual engine noise
Signal carries out power amplification, obtains engine sound signal and exports, and for the virtual exhaust tail mouth noise signal
Power amplification is carried out, exhaust tail voice sound signal is obtained and exports；
Loudspeaker unit, including headstock loud speaker are arranged on the head of the automobile, defeated with the power amplification unit
Outlet connects, and further includes tailstock loud speaker for generating engine sound corresponding with the engine sound signal, and setting exists
The tail portion of the automobile is connect with the output end of the power amplification unit, for generating and the exhaust tail voice sound signal
Corresponding exhaust outlet sound.
In preferred embodiment, the power amplification unit includes：
Input terminal, and the signal fitting unit communication, for receiving the virtual engine noise signal and the void
Quasi- exhaust tail mouth noise signal；
Range radar module, is arranged on the head of the automobile, for measure in real time the automobile head and pedestrian it
Between range data；
Gain calculation module, for according to the range data, the power gain number of power amplifier to be calculated in real time
According to；
Power amplifier, for using the power gain data respectively to the virtual engine noise signal and described
Virtual exhaust tail mouth noise signal carries out power amplification, obtains the engine sound signal and the exhaust tail voice message
Number；
Output end, and the headstock loud speaker signalling, for raising the engine sound signal transmission to the headstock
Sound device, the output end also with the tailstock loud speaker signalling, for the exhaust tail voice sound signal to be transmitted to the vehicle
Tail loud speaker.
In preferred embodiment, the signal fitting unit includes：
Digital signal fitting module, for corresponding using the engine speed data and the engine speed data
Noise figure sample, fitting obtains virtual engine noisy digit signal, and utilizes the engine speed data and the hair
The corresponding exhaust tail mouth noise figure sample of motivation rotary speed data, fitting obtain virtual exhaust tail mouth noisy digit signal；
D/A converter is communicated with the digital signal fitting module, for the virtual engine noisy digit signal
D/A switch is carried out, obtains the virtual engine noise signal, and for believing the virtual exhaust tail mouth noisy digit
Number carry out D/A switch, obtain the virtual engine noise signal.
In preferred embodiment, the digital signal fitting module is integrated with computer storage media, and the storage medium is deposited
Engine noise value sample corresponding with the pre-selected pattern and exhaust tail mouth noise figure sample are contained,
It is also stored with computer program, described program realizes following steps when being executed by the digital signal fitting module：
Using the engine speed data and the corresponding engine noise value sample of the engine speed data, use
Engine noise fitting formula, fitting obtain virtual engine noisy digit signal；
Using the engine speed data and the corresponding exhaust tail mouth noise figure sample of the engine speed data, adopt
With exhaust tail mouth fitting of noise formula, fitting obtains virtual exhaust tail mouth noisy digit signal.
In preferred embodiment, the engine noise value sample includes：
Two order engine noise values, four order engine noise values, six order engine noise values, eight order engines
Noise figure.
In preferred embodiment, the exhaust tail mouth noise figure sample includes：
Two order exhaust tail mouth noise figures, four order exhaust tail mouth noise figures, six order exhaust tail mouth noise figures, eight orders
Exhaust tail mouth noise figure.
In preferred embodiment, the engine noise fitting formula includes：
VSEng=SPLEngOrder(2)+SPLEngOrder(4)+SPLEngOrder(6)+SPLEngOrder(8)+ε(n)
In formula, n indicates the engine speed；
SPLEngOrder(2)Indicate the corresponding two orders engine noise values of the engine speed n；
SPLEngOrder(4)Indicate the corresponding four orders engine noise values of the engine speed n；
SPLEngOrder(6)Indicate the corresponding six orders engine noise values of the engine speed n；
SPLEngOrder(8)Indicate the corresponding eight orders engine noise values of the engine speed n；
ε (n) indicates the corresponding noise correction values of the engine speed n.
In preferred embodiment, the exhaust tail mouth fitting of noise formula includes：
VSExh=SPLEhxOrder(2)+SPLEhxOrder(4)+SPLEhxOrder(6)+SPLEhxOrder(8)+ε(n)
In formula, n indicates the engine speed；
SPLEhxOrder(2)Indicate the corresponding two orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(4)Indicate the corresponding four orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(6)Indicate the corresponding six orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(8)Indicate the corresponding two orders exhaust tail mouth noise figures of the engine speed n；
ε (n) indicates the corresponding noise correction values of engine speed n.
In preferred embodiment, the gain calculation module is integrated with computer storage media, and the storage medium is stored with
Computer program, described program realize following steps when being executed by the gain calculation module：
According to the range data, the first range data of the headstock loud speaker and the pedestrian is calculated；
According to vehicle commander's data of the range data and the automobile, the tailstock loud speaker and the pedestrian is calculated
Second distance data；
According to first range data, be calculated the power amplifier to the virtual engine noise signal into
First gain data of row power amplification；
According to the second distance data, the power amplifier is calculated to the virtual exhaust tail mouth noise signal
Carry out the second gain data of power amplification；
It is corresponding,
The power amplifier carries out power to the virtual engine noise signal using first gain data and puts
Greatly, the engine sound signal is obtained, the virtual exhaust tail mouth noise signal is carried out using second gain data
Power amplification obtains the exhaust tail voice sound signal.
In preferred embodiment, the range radar module includes millimetre-wave radar.
It, can be electronic using obtaining in real time using a kind of electric vehicle sound caution system provided by the embodiments of the present application
The vehicle speed data and motor speed data of automobile, synthesize corresponding engine speed data.And then it can be started according to described
Machine rotary speed data, simulates virtual engine noise signal corresponding with the engine speed data and virtual exhaust tail mouth is made an uproar
Acoustical signal controls described two kinds of noise signals of power amplifier pair further according to the distance between pedestrian and automobile and is amplified
Gain, the gain described in this way can change with the variation of pedestrian and the distance between automobile.In this way eventually by the vehicle
The exhaust tail voice sound that the engine sound and the tailstock loud speaker that head loud speaker generates generate, close to traditional I. C. engine steam
Vehicle noise (engine noise and exhaust tail mouth noise contribution degree highest in internal-combustion engines vehicle noise, by engine noise and
The motion state etc. that exhaust noise can identify vehicle, can position automobile position, judge automobile), pedestrian can be made effectively to know
Electric vehicle is not gone out.Again since the intensity of above two sound (engine sound and the exhaust tail voice sound) can be with
Automobile distance furthers and changes, so the distance and travel speed of automobile can also be substantially judged by above two sound,
So as to effectively improve warning effect, the safety of electric vehicle is effectively improved.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of modular structure schematic diagram for electric vehicle sound caution system that the application one embodiment provides；
Fig. 2 is the modular structure schematic diagram for the power amplification unit that the application one embodiment provides；
Fig. 3 is the systematic difference schematic diagram of a scenario provided in the application one embodiment；
Fig. 4 is the modular structure schematic diagram for the signal fitting unit that the application one embodiment provides；
Fig. 5 is a kind of workflow schematic diagram for electric vehicle sound caution system that one example of the application provides.
Specific implementation mode
The embodiment of the present application provides a kind of electric vehicle sound caution system.
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The every other embodiment that technical staff is obtained without creative efforts should all belong to the application protection
Range.
Fig. 1 is a kind of a kind of herein described modular structure schematic diagram of embodiment of electric vehicle sound caution system.Though
So this application provides such as following embodiments or apparatus structures shown in the drawings, but based on routine or are not necessarily to performing creative labour
May include more or less modular unit in said device.There is no necessary causal structures in logicality
In, the modular structure of these devices is not limited to the embodiment of the present application or modular structure shown in the drawings.The modular structure
Device or end product in practice according to embodiment or modular structure shown in the drawings progress sequence in application, can hold
Row is either parallel to be executed (such as the environment of parallel processor or multiple threads, the implementation ring for even including distributed treatment
Border).
Specifically, as described in Figure 1, a kind of a kind of embodiment of electric vehicle sound caution system provided by the present application can be with
Including：
Signal acquiring unit 101 is communicated with the CAN bus of electric vehicle, can be used for obtaining the vehicle of the automobile in real time
The motor speed data of fast data and the automobile；
Engine speed data generation unit 102 is communicated with the signal acquiring unit 101, can be used for institute in real time
Vehicle speed data and motor speed data operation synthesis are stated, engine speed data is obtained；
Signal fitting unit 103 communicates with the engine speed data generation unit 102, can be used for according to pre-selection
Mould-fixed, using the engine speed data, fitting obtains virtual engine noise signal, and fitting is virtually vented
Tail mouth noise signal；
Power amplification unit 104, input terminal and the signal fitting unit communication, can be used for virtually starting to described
Machine noise signal carries out power amplification, obtains engine sound signal and exports, and for making an uproar to the virtual exhaust tail mouth
Acoustical signal carries out power amplification, obtains exhaust tail voice sound signal and exports；
Loudspeaker unit 105, including headstock loud speaker are arranged on the head of the automobile, with the power amplification unit
104 output end connection further includes that the tailstock is raised one's voice for generating engine sound corresponding with the engine sound signal
Device is arranged in the tail portion of the automobile, is connect with the output end of the power amplification unit 104, for generating and the exhaust
The corresponding exhaust tail voice sound of tail voice sound signal.
Wherein, pass through the speed of electric vehicle and motor speed, so that it may which corresponding traditional combustion engine is simulated with synthesis
The engine speed of vehicle.According to the engine speed synthesized, so that it may corresponding with the engine speed virtual to fit
Engine noise signal and virtual exhaust tail mouth noise signal.
Wherein, the engine sound signal and the exhaust tail voice sound signal are the electricity that the driving loud speaker occurs
Signal, after being input to the loud speaker, the headstock loud speaker sends out engine sound corresponding with the engine sound signal
Sound, the tailstock loud speaker send out exhaust tail voice sound corresponding with the exhaust tail voice sound signal.The headstock loud speaker
It can be arranged in electric vehicle headstock corresponding to the position where traditional combustion engine automobile engine, the tailstock loud speaker can be with
It is arranged in automobile tail corresponding to the position where traditional combustion engine automobile exhaust tail mouth.
Wherein, the pre-selected pattern may include city, movement, peace and quiet, outdoor pattern, the signal fitting unit and
Pattern selectes unit communication, and the size of the corresponding order noise of different patterns, ingredient proportion are different.The signal fitting unit
According to pre-selected pattern, according to the engine data under pre-selected pattern corresponding engine noise value sample and exhaust tail
Mouth noise figure sample, can fit virtual engine noise signal and virtual exhaust tail mouth noise signal.
It is fitted to obtain the virtual engine noise signal specifically, following fitting formulas may be used：
VSEng=SPLEngOrder(2)+SPLEngOrder(4)+SPLEngOrder(6)+SPLEngOrder(8)+ε(n)
In formula, n indicates the engine speed；
SPLEngOrder(2)Indicate the corresponding two orders engine noise values of the engine speed n；
SPLEngOrder(4)Indicate the corresponding four orders engine noise values of the engine speed n；
SPLEngOrder(6)Indicate the corresponding six orders engine noise values of the engine speed n；
SPLEngOrder(8)Indicate the corresponding eight orders engine noise values of the engine speed n；
ε (n) indicates the corresponding noise correction values of the engine speed n.
Wherein, SPLEngOrder(i)=f (n) i=2,4,6,8, the engine noise value sample of each order is about hair
The function of motivation rotating speed n, changes with the variation of engine speed n.
Following fitting formulas may be used to be fitted to obtain the virtual exhaust tail mouth noise signal：
VSExh=SPLEhxOrder(2)+SPLEhxOrder(4)+SPLEhxOrder(6)+SPLEhxOrder(8)+ε(n)
In formula, n indicates the engine speed；
SPLEhxOrder(2)Indicate the corresponding two orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(4)Indicate the corresponding four orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(6)Indicate the corresponding six orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(8)Indicate the corresponding two orders exhaust tail mouth noise figures of the engine speed n；
ε (n) indicates the corresponding noise correction values of engine speed n.
In formula, SPLEhxOrder(i)=f (n) i=2,4,6,8, the exhaust tail mouth noise figure sample of each order be about
The function of engine speed n changes with the variation of engine speed n.
The corresponding two kinds of noise figure samples of above-mentioned each mode engine rotating speed n are all that be stored in advance in the signal quasi-
In the storage medium for closing unit.
Fig. 2 is the modular structure schematic diagram for the power amplification unit that the application one embodiment provides, such as Fig. 2 institutes
It states, in this example, the power amplification unit 104 may include：
Input terminal 1041 is communicated with the signal fitting unit 103, for receive the virtual engine noise signal and
The virtual exhaust tail mouth noise signal；
The head that can be used for measuring the automobile in real time on the head of the automobile is arranged in range radar module 1042
The distance between pedestrian data；
Gain calculation module 1043 can be used for, according to the range data, power amplifier 1044 being calculated in real time
Power gain data；
Power amplifier 1044 is communicated with the gain calculation module 1043, for using the power gain data point
It is other to the virtual engine noise signal and the virtual exhaust tail mouth noise signal carries out power amplification, obtain described start
Machine voice signal and the exhaust tail voice sound signal；
Output end 1045 is used for the headstock loud speaker signalling by the engine sound signal transmission to the vehicle
Head loud speaker, the output end 1045 also with the tailstock loud speaker signalling, are used for the exhaust tail mouth transmission of sound signals
To the tailstock loud speaker.
In this example, the gain calculation module 1043 is integrated with computer storage media, and the storage medium is stored with meter
Following steps may be implemented when being executed by the gain calculation module 1043 in calculation machine program, described program：
According to the range data, the first range data of the headstock loud speaker and the pedestrian is calculated；
According to vehicle commander's data of the range data and the automobile, the tailstock loud speaker and the pedestrian is calculated
Second distance data；
According to first range data, be calculated the power amplifier to the virtual engine noise signal into
First gain data of row power amplification；
According to the second distance data, the power amplifier is calculated to the virtual exhaust tail mouth noise signal
Carry out the second gain data of power amplification；
It is corresponding,
The power amplifier carries out power to the virtual engine noise signal using first gain data and puts
Greatly, the engine sound signal is obtained, the virtual exhaust tail mouth noise signal is carried out using second gain data
Power amplification obtains the exhaust tail voice sound signal.
Fig. 3 is the systematic difference schematic diagram of a scenario provided in the application one embodiment.As shown in figure 3, described
Headstock loud speaker is arranged on the head of the automobile, and the tailstock loud speaker is provided in the tail portion of the automobile, the radar
Range finder module may include millimetre-wave radar, and the millimetre-wave radar is arranged on the head of automobile.In Fig. 3, millimetre-wave radar is surveyed
The distance for obtaining headstock to pedestrian is L0, according to the L0The headstock can be calculated with the distance of the millimetre-wave radar to raise
Sound device distance L between pedestrian1, according to L at any time0The tailstock loud speaker can be calculated with the length of wagon of the automobile
The distance L between pedestrian2。
Since first gain data and second gain data all can be with the variations of distance between automobile and pedestrian
And change, and then the volume of the engine sound and the exhaust tail voice sound also can be with distance between automobile and pedestrian
Change and change, pedestrian can judge position and the speed of automobile according to the sound.
Fig. 4 is the modular structure schematic diagram for the signal fitting unit that the application one embodiment provides, such as Fig. 4 institutes
It states, the signal fitting unit 103 includes：
Digital signal fitting module 1031, for utilizing the engine speed data and the engine speed data pair
The noise figure sample answered, fitting obtains virtual engine noisy digit signal, and utilizes the engine speed data and institute
The corresponding exhaust tail mouth noise figure sample of engine speed data is stated, fitting obtains virtual exhaust tail mouth noisy digit signal；
D/A converter 1031 is communicated with the digital signal fitting module 1031, for the virtual engine noise
Digital signal carries out D/A switch, obtains the virtual engine noise signal, and for making an uproar to the virtual exhaust tail mouth
Sound digital signal carries out D/A switch, obtains the virtual engine noise signal.
Wherein, the D/A converter indicates digital converter, can convert digital signals into analog signal.
In this example, the digital signal fitting module 1031 is integrated with computer storage media, the storage medium storage
There are engine noise value sample corresponding with the pre-selected pattern and exhaust tail mouth noise figure sample,
It is also stored with computer program, described program realizes following steps when being executed by the digital signal fitting module：
Using the engine speed data and the corresponding engine noise value sample of the engine speed data, use
Engine noise fitting formula, fitting obtain virtual engine noisy digit signal；
Using the engine speed data and the corresponding exhaust tail mouth noise figure sample of the engine speed data, adopt
With exhaust tail mouth fitting of noise formula, fitting obtains virtual exhaust tail mouth noisy digit signal.
Wherein, the engine noise value sample may include：
Two order engine noise values, four order engine noise values, six order engine noise values, eight order engines
Noise figure.
Wherein, the exhaust tail mouth noise figure sample may include：
Two order exhaust tail mouth noise figures, four order exhaust tail mouth noise figures, six order exhaust tail mouth noise figures, eight orders
Exhaust tail mouth noise figure.
In this example, the engine noise fitting formula may include：
VSEng=SPLEngOrder(2)+SPLEngOrder(4)+SPLEngOrder(6)+SPLEngOrder(8)+ε(n)
In formula, n indicates the engine speed；
SPLEngorder(2)Indicate the corresponding two orders engine noise values of the engine speed n；
SPLEngOrder(4)Indicate the corresponding four orders engine noise values of the engine speed n；
SPLEngorder(6)Indicate the corresponding six orders engine noise values of the engine speed n；
SPLEngOrder(8)Indicate the corresponding eight orders engine noise values of the engine speed n；
ε (n) indicates the corresponding noise correction values of the engine speed n.
In this example, the exhaust tail mouth fitting of noise formula may include：
VSExh=SPLEhxOrder(2)+SPLEhxOrder(4)+SPLEhxOrder(6)+SPLEhxOrder(8)+ε(n)
In formula, n indicates the engine speed；
SPLEhxOrder(2)Indicate the corresponding two orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxorder(4)Indicate the corresponding four orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(6)Indicate the corresponding six orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(8)Indicate the corresponding two orders exhaust tail mouth noise figures of the engine speed n；
ε (n) indicates the corresponding noise correction values of engine speed n.
Fig. 5 is a kind of workflow schematic diagram for electric vehicle sound caution system that one example of the application provides.Tool
Body, as shown in figure 5, the system got speed signal and motor speed signal by vehicle CAN bus before this, by fortune
It calculates synthesis and obtains corresponding engine rotational speed signal.Pattern is then selected by shown mode controlling unit, according to pre-selection cover half
Formula fits corresponding virtual engine noisy digit signal and virtual exhaust tail mouth noise using the engine rotational speed signal
Digital signal.By D/A converter, analog signal is converted digital signals into, using power amplifier according to pre-selected pattern
And automobile is amplified the engine noise signal and the exhaust tail mouth noise signal at a distance from pedestrian, respectively
Engine sound and exhaust tail voice sound are sent out using headstock loud speaker and tailstock loud speaker.
Using a kind of embodiment for electric vehicle sound caution system that the various embodiments described above provide, can utilize real-time
The vehicle speed data and motor speed data of the electric vehicle of acquisition, synthesize corresponding engine speed data.And then it can root
According to the engine speed data, virtual engine noise signal corresponding with the engine speed data and virtual is simulated
Exhaust tail mouth noise signal controls two kinds of the power amplifier pair noise further according to the distance between pedestrian and automobile and believes
Number gain being amplified, the gain described in this way can change with the variation of pedestrian and the distance between automobile.It is final in this way
The exhaust tail voice sound that the engine sound and the tailstock loud speaker generated by the headstock loud speaker generates, close to tradition
The noise of internal-combustion engines vehicle (engine noise and exhaust tail mouth noise contribution degree highest, pass through hair in internal-combustion engines vehicle noise
The motion state etc. that motivation noise and exhaust noise can identify vehicle, can position automobile position, judge automobile), it can make
Pedestrian effectively identifies electric vehicle.Again due to above two sound (engine sound and the exhaust tail voice sound)
Intensity can furthering and change with automobile distance, so can also substantially be judged by above two sound automobile distance and
Travel speed effectively improves the safety of electric vehicle so as to effectively improve warning effect.
Device that above-described embodiment illustrates or module etc. can specifically realize by computer chip or entity, or by having
There is the product of certain function to realize.For convenience of description, it is divided into various modules when description apparatus above with function to retouch respectively
It states.Certainly, the function of each module is realized can in the same or multiple software and or hardware when implementing the application,
The module for realizing same function can be realized by the combination of multiple submodule etc..Device embodiment described above is only
Schematically, for example, the division of the module, only a kind of division of logic function, can there is other draw in actual implementation
The mode of dividing, such as multiple module or components can be combined or can be integrated into another system, or some features can be ignored,
Or it does not execute.
The application can describe in the general context of computer-executable instructions executed by a computer, such as program
Module.Usually, program module includes routines performing specific tasks or implementing specific abstract data types, program, object, group
Part, data structure, class etc..The application can also be put into practice in a distributed computing environment, in these distributed computing environments,
By executing task by the connected remote processing devices of communication network.In a distributed computing environment, program module can
With in the local and remote computer storage media including storage device.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It is realized by the mode of software plus required general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be expressed in the form of software products, the computer software product
It can be stored in a storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are used so that a computer equipment
(can be personal computer, mobile terminal, server either network equipment etc.) executes each embodiment of the application or implementation
Method described in certain parts of example.
Each embodiment in this specification is described by the way of progressive, same or analogous portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and
Variation is without departing from spirit herein, it is desirable to which the attached claims include these deformations and change without departing from the application's
Spirit.
Claims (10)
1. a kind of electric vehicle sound caution system, which is characterized in that the system comprises：
Signal acquiring unit is communicated with the CAN bus of electric vehicle, vehicle speed data for obtaining the automobile in real time and described
The motor speed data of automobile；
Engine speed data generation unit is communicated with the signal acquiring unit, in real time by the vehicle speed data and institute
The synthesis of motor speed data operation is stated, engine speed data is obtained；
Signal fitting unit is communicated with the engine speed data generation unit, for according to pre-selected pattern, using described
Engine speed data, fitting obtain virtual engine noise signal, and fitting obtains virtual exhaust tail mouth noise signal；
Power amplification unit, input terminal and the signal fitting unit communication, for the virtual engine noise signal
Power amplification is carried out, engine sound signal is obtained and exports, and for being carried out to the virtual exhaust tail mouth noise signal
Power amplification obtains exhaust tail voice sound signal and exports；
Loudspeaker unit, including headstock loud speaker are arranged on the head of the automobile, the output end with the power amplification unit
Connection further includes tailstock loud speaker for generating engine sound corresponding with the engine sound signal, is arranged described
The tail portion of automobile is connect with the output end of the power amplification unit, corresponding with the exhaust tail voice sound signal for generating
Exhaust tail voice sound.
2. a kind of electric vehicle sound caution system as described in claim 1, which is characterized in that the power amplification unit packet
It includes：
Input terminal, and the signal fitting unit communication, for receiving the virtual engine noise signal and the virtual row
Gas tail mouth noise signal；
Range radar module is arranged on the head of the automobile, between the head and pedestrian for measuring the automobile in real time
Range data；
Gain calculation module, for according to the range data, the power gain data of power amplifier to be calculated in real time；
Power amplifier, for using the power gain data respectively to the virtual engine noise signal and described virtual
Exhaust tail mouth noise signal carries out power amplification, obtains the engine sound signal and the exhaust tail voice sound signal；
Output end is used for the headstock loud speaker signalling by the engine sound signal transmission to the headstock loud speaker,
The output end also with the tailstock loud speaker signalling, is raised one's voice for the exhaust tail voice sound signal to be transmitted to the tailstock
Device.
3. a kind of electric vehicle sound caution system as described in claim 1, which is characterized in that the signal fitting unit packet
It includes：
Digital signal fitting module, for utilizing the engine speed data and the corresponding noise of the engine speed data
It is worth sample, fitting obtains virtual engine noisy digit signal, and utilizes the engine speed data and the engine
The corresponding exhaust tail mouth noise figure sample of rotary speed data, fitting obtain virtual exhaust tail mouth noisy digit signal；
D/A converter is communicated with the digital signal fitting module, for being carried out to the virtual engine noisy digit signal
D/A switch, obtains the virtual engine noise signal, and for the virtual exhaust tail mouth noisy digit signal into
Row D/A switch obtains the virtual engine noise signal.
4. a kind of electric vehicle sound caution system as claimed in claim 3, which is characterized in that the digital signal is fitted mould
Block is integrated with computer storage media, and the storage medium is stored with engine noise corresponding with the engine speed data
It is worth sample and exhaust tail mouth noise figure sample,
It is also stored with computer program, described program realizes following steps when being executed by the digital signal fitting module：
Using the engine speed data and the corresponding engine noise value sample of the engine speed data, using starting
Machine fitting of noise formula, fitting obtain virtual engine noisy digit signal；
Using the engine speed data and the corresponding exhaust tail mouth noise figure sample of the engine speed data, using row
Gas tail mouth fitting of noise formula, fitting obtain virtual exhaust tail mouth noisy digit signal.
5. a kind of electric vehicle sound caution system as claimed in claim 4, which is characterized in that the engine noise value sample
Originally include：
Two order engine noise values, four order engine noise values, six order engine noise values, eight order engine noises
Value.
6. a kind of electric vehicle sound caution system as claimed in claim 4, which is characterized in that the exhaust tail mouth noise figure
Sample includes：
Two order exhaust tail mouth noise figures, four order exhaust tail mouth noise figures, six order exhaust tail mouth noise figures, the exhaust of eight orders
Tail mouth noise figure.
7. a kind of electric vehicle sound caution system as claimed in claim 4, which is characterized in that the engine noise fitting
Formula includes：
VSEng=SPLEngOrder(2)+SPLEngOrder(4)+SPLEngOrder(6)+SPLEngOrder(8)+ε(n)
In formula, n indicates the engine speed；
SPLEngOrder(2)Indicate the corresponding two orders engine noise values of the engine speed n；
SPLEngOrder(4)Indicate the corresponding four orders engine noise values of the engine speed n；
SPLEngOrder(6)Indicate the corresponding six orders engine noise values of the engine speed n；
SPLEngOrder(8)Indicate the corresponding eight orders engine noise values of the engine speed n；
ε (n) indicates the corresponding noise correction values of the engine speed n.
8. a kind of electric vehicle sound caution system as claimed in claim 4, which is characterized in that the exhaust tail mouth noise is quasi-
Closing formula includes：
VSExh=SPLEhxOrder(2)+SPLEhxOrder(4)+SPLEhxOrder(6)+SPLEhxOrder(8)+ε(n)
In formula, n indicates the engine speed；
SPLEhxOrder(2)Indicate the corresponding two orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(4)Indicate the corresponding four orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(6)Indicate the corresponding six orders exhaust tail mouth noise figures of the engine speed n；
SPLEhxOrder(8)Indicate the corresponding two orders exhaust tail mouth noise figures of the engine speed n；
ε (n) indicates the corresponding noise correction values of engine speed n.
9. a kind of electric vehicle sound caution system as claimed in claim 2, which is characterized in that the gain calculation module collection
At having computer storage media, the storage medium to be stored with computer program, described program is held by the gain calculation module
Following steps are realized when row：
According to the range data, the first range data of the headstock loud speaker and the pedestrian is calculated；
According to vehicle commander's data of the range data and the automobile, the of the tailstock loud speaker and the pedestrian is calculated
Two range data；
According to first range data, the power amplifier is calculated, work(is carried out to the virtual engine noise signal
First gain data of rate amplification；
According to the second distance data, the power amplifier is calculated, the virtual exhaust tail mouth noise signal is carried out
Second gain data of power amplification；
It is corresponding,
The power amplifier carries out power amplification using first gain data to the virtual engine noise signal, obtains
To the engine sound signal, power is carried out to the virtual exhaust tail mouth noise signal using second gain data and is put
Greatly, the exhaust tail voice sound signal is obtained.
10. a kind of electric vehicle sound caution system as claimed in claim 2, which is characterized in that the range radar module
Including millimetre-wave radar.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109278634A (en) * | 2018-10-15 | 2019-01-29 | 刘贵华 | A kind of imitative mixer of automobile |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700459A (en) * | 2012-06-25 | 2012-10-03 | 汉得利（常州）电子有限公司 | Multifunctional warning system for new energy automobile |
| CN103260951A (en) * | 2011-08-08 | 2013-08-21 | 雅马哈发动机株式会社 | Driving-linked sound generation device |
| CN103895567A (en) * | 2014-03-26 | 2014-07-02 | 北京长安汽车工程技术研究有限责任公司 | Method and device for sound simulation and sound production of electric vehicle |
| JP2014202856A (en) * | 2013-04-03 | 2014-10-27 | パイオニア株式会社 | Engine sound output device and engine sound output method |
| CN104185575A (en) * | 2012-03-16 | 2014-12-03 | 三菱电机株式会社 | Alert sound control unit for vehicle approach notification device |
| CN105190742A (en) * | 2013-02-22 | 2015-12-23 | 舍弗勒技术股份两合公司 | Audio signal of synthetic noise of motor vehicle and generating method thereof |
| CN107097718A (en) * | 2017-06-15 | 2017-08-29 | 北京普瑞众创科技有限公司 | Active speech synthesizing device and the vehicles |
| CN107199946A (en) * | 2017-05-10 | 2017-09-26 | 延锋伟世通电子科技（南京）有限公司 | The engine noise analogy method and system of a kind of electronic and mixed electrical automobile |
| CN206826508U (en) * | 2017-06-28 | 2018-01-02 | 长城汽车股份有限公司 | Speech simulation system of driving a vehicle and vehicle |
| CN208789579U (en) * | 2018-02-23 | 2019-04-26 | 清华大学苏州汽车研究院（相城） | A kind of electric car sound warning system |
-
2018
- 2018-02-23 CN CN201810154700.4A patent/CN108312959B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260951A (en) * | 2011-08-08 | 2013-08-21 | 雅马哈发动机株式会社 | Driving-linked sound generation device |
| CN104185575A (en) * | 2012-03-16 | 2014-12-03 | 三菱电机株式会社 | Alert sound control unit for vehicle approach notification device |
| CN102700459A (en) * | 2012-06-25 | 2012-10-03 | 汉得利（常州）电子有限公司 | Multifunctional warning system for new energy automobile |
| CN105190742A (en) * | 2013-02-22 | 2015-12-23 | 舍弗勒技术股份两合公司 | Audio signal of synthetic noise of motor vehicle and generating method thereof |
| JP2014202856A (en) * | 2013-04-03 | 2014-10-27 | パイオニア株式会社 | Engine sound output device and engine sound output method |
| CN103895567A (en) * | 2014-03-26 | 2014-07-02 | 北京长安汽车工程技术研究有限责任公司 | Method and device for sound simulation and sound production of electric vehicle |
| CN107199946A (en) * | 2017-05-10 | 2017-09-26 | 延锋伟世通电子科技（南京）有限公司 | The engine noise analogy method and system of a kind of electronic and mixed electrical automobile |
| CN107097718A (en) * | 2017-06-15 | 2017-08-29 | 北京普瑞众创科技有限公司 | Active speech synthesizing device and the vehicles |
| CN206826508U (en) * | 2017-06-28 | 2018-01-02 | 长城汽车股份有限公司 | Speech simulation system of driving a vehicle and vehicle |
| CN208789579U (en) * | 2018-02-23 | 2019-04-26 | 清华大学苏州汽车研究院（相城） | A kind of electric car sound warning system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109278634A (en) * | 2018-10-15 | 2019-01-29 | 刘贵华 | A kind of imitative mixer of automobile |
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