CN208715080U - A kind of sonification system of simulated engine exhaust sound - Google Patents
A kind of sonification system of simulated engine exhaust sound Download PDFInfo
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- CN208715080U CN208715080U CN201821015102.0U CN201821015102U CN208715080U CN 208715080 U CN208715080 U CN 208715080U CN 201821015102 U CN201821015102 U CN 201821015102U CN 208715080 U CN208715080 U CN 208715080U
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Abstract
The utility model discloses a kind of sonification systems of simulated engine exhaust sound, it is characterized in that, including the CAN bus data resolution module connecting with electromobile CAN bus, CAN bus data resolution module is sequentially connected sound rendering module, D A switch module, power amplifier module, loudspeaker module.The utility model by simulating engine exhaust noise corresponding with vehicle condition in real time, under pedestrian's security warning sound mode, pedestrian has that vehicle is close around can effectively reminding in low vehicle speeds, and in the case where kinesthesia is vented sound pattern, the enjoyment of driving can be improved.Due to using the richer engine exhaust sound of spectrum energy as target sound, and more effective sound rendering algorithm is used to synthesize the broader voice signal of frequency spectrum, keep sound subjective feeling truer, it is fuller.
Description
Technical field
The utility model relates to a kind of using electronic equipment come the system of simulated engine exhaust sound, in particular to one kind
Security warning sound and all automobiles are issued when running at a low speed for electromobile to increase the kinesthesia row of driving pleasure
Gas acoustic simulation system.
Background technique
Electromobile due to emission-free discharge, have the advantages that it is environmentally protective, increasingly by domestic and international look forward to
Industry, government are paid attention to and are promoted.Electric drive automobile is generally more quiet, when especially running at a low speed, be difficult to cause pedestrian's note that
This gives pedestrian, especially blind person, and the groups such as child and old man bring very big risk.Simultaneously because lack conventional engines and
The kinesthesia sound of exhaust, can not be from the enjoyment for acoustically experiencing driving.Conventional fuel oil automobile assembles small displacement mostly and starts
Machine cannot achieve outstanding kinesthesia exhaust sound by changing exhaust system substantially, reduce the enjoyment acoustically driven.
To solve the problems, such as above low-speed pedestrian's caution sound and kinesthesia exhaust sound, currently marketed technology focuses mostly on greatly
In simulated engine sound, and it is divided into two kinds of technology realization rates, one is the sound recorded in advance is stored in memory
In, sonification system controller retrieves corresponding sound according to vehicle-state and plays back.The advantages of this method is system letter
Single, easy to implement, the disadvantage is that sound and vehicle drive movement matching degree are poor, sound connecting is poor when vehicle-state changes,
In the presence of discontinuous and delay sense.Another method is to synthesize engine sound signal in real time using voice synthesis, and pass through
Loudspeaker makes a sound.This method overcomes the matching and delay sense problem of first method, but due to engine sound
Frequency spectrum is relatively narrow, and usual sound rendering algorithm only synthesizes 500Hz frequency sound below, and the frequency that human ear can be experienced is up to
20kHz, therefore the sound subjective feeling being synthesized is not full, gives the false feeling of people.
Summary of the invention
Problem to be solved in the utility model is: the sonification system of existing simulated engine exhaust sound lacks the sense of reality
The problem of.
To solve the above-mentioned problems, the utility model provides a kind of sonification system of simulated engine exhaust sound,
It is characterized in that, including the CAN bus data resolution module connecting with electromobile CAN bus, CAN bus data parse mould
Block is sequentially connected sound rendering module, D A switch module, power amplifier module, loudspeaker module；When the generating system application
When electric drive automobile, CAN bus data resolution module is connect by simulating shift module with sound rendering module, when the generation
When system is applied to conventional fuel oil car, CAN bus data resolution module is directly connect with sound rendering module.
Preferably, the sound rendering module includes low speed caution sound mode and kinesthesia exhaust sound pattern.
Each module effect in the utility model is as follows:
1, CAN bus data resolution module receives the signal message in electromobile CAN bus, and parses electricity
The information such as machine/engine rotational speed signal, accelerator pedal signal, motor/engine load and speed.
2, simulation shift module is according to information such as motor speed signal, accelerator pedal signal, motor load and speed and interior
Set simulation strategy, simulate electromobile gear corresponding with conventional fuel oil car and engine speed information, and by these
Information is transferred to sound rendering module.Since electromobile is the transmission ratio of single fixation mostly, shift module is simulated
Effect is that motor speed is scaled engine speed corresponding with conventional fuel oil car.Simulate shift module workflow be according to
Corresponding speed is calculated according to the motor speed received, while being judged to be presently in simulation gear according to vehicle condition, such as
In need to carry out simulation upshift and downshift, can calculating corresponding engine speed by speed and gear information, (tradition is fired
Oily vehicle is without simulation shift module).
3, sound rendering module synthesizes two class sound according to engine speed information, and one kind is and the strong phase of engine speed
The addition of these two types of sound is by the harmonic order sound of pass, the another kind of random sound of wideband to increase sound plumpness and natural sense
Final synthetic video can be obtained.The input of sound rendering module is engine speed.Sound rendering module will be right in terms of two
Sound is synthesized, and is on the one hand harmonic order sound relevant to engine speed, such sound spectrum is relatively narrow, usually less than
1kHz, but it constitutes the main tone of engine exhaust sound.It on the other hand is the wider random sound of frequency spectrum, such sound can
The plumpness for increasing sound, makes sound sound more true nature.
4, digital signal sound obtained by sound rendering module is converted to playable analog signal sound by D A switch module
Sound.The output of sound rendering module is digital signal, can not be directly output to loudspeaker broadcasting.The effect of D A switch module
For digital audio signal is converted to analoging sound signal real-time continuously, and export to power amplifier module.
5, the resulting analog signal sound of D A switch module is carried out power amplification by power amplifier module, and is exported extremely
Loudspeaker module.
6, loudspeaker module plays out the sound by power amplification into vehicle-periphery.
The utility model uses the engine exhaust sound of frequency wider (>=2kHz) as target sound, with automobile CAN
Input of the signal got at (Controller Area Network) bus as sound rendering, is synthesized in real time by MCU
Sound corresponding with current vehicle condition out, while by the sound synthesized through power amplification and by being mounted on raising for automobile external
Sound device overseas publicity.The wide band sound bring sense of reality is stronger, and preferably Pedestrians and vehicles can be reminded close in low speed,
And can more realistically reappear kinesthesia exhaust sound, increase the enjoyment of driving.
The utility model has the beneficial effects that by simulating engine exhaust noise corresponding with vehicle condition in real time,
Under pedestrian's security warning sound mode, can effectively be reminded in low vehicle speeds around pedestrian have that vehicle is close, transporting
Under innervation exhaust sound pattern, the enjoyment of driving can be improved.Make due to using the richer engine exhaust sound of spectrum energy
For target sound, and more effective sound rendering algorithm is used to synthesize the broader voice signal of frequency spectrum, make sound subjectivity sense
It is fuller by truer.
Detailed description of the invention
Fig. 1 is the module connection figure of the sonification system of simulated engine exhaust sound provided by the utility model；
Fig. 2 is the flow chart for the gear selection strategy that the utility model simulates shift module；
Fig. 3 is the working principle diagram of the utility model sound rendering module.
Specific embodiment
To be clearer and more comprehensible the utility model, hereby with preferred embodiment, and attached drawing is cooperated to be described in detail below.
Embodiment
As shown in Figure 1, being a kind of sonification system of simulated engine exhaust sound provided by the utility model comprising with
The CAN bus data resolution module of electromobile CAN bus connection, CAN bus data resolution module are sequentially connected sound
Synthesis module, D A switch module, power amplifier module, loudspeaker module；When the generating system is applied to electric drive automobile
When, CAN bus data resolution module is connect by simulating shift module with sound rendering module, when the generating system is applied to pass
When system fuel vehicle, CAN bus data resolution module is directly connect with sound rendering module.CAN bus data in the present embodiment
Parsing module receives CAN signal using MCP2551, and carries out processing parsing through MCU STM32F407VGT6；Simulate shift module
It is simulated using MCU STM32F407VGT6；Sound rendering module carries out sound rendering using MCU STM32F407VGT6；
D A switch module carries out sound digital-to-analogue conversion using WM8978；Power amplifier module uses TDA7850；Loudspeaker module is adopted
With favour prestige CF250II.
Each module effect is as follows:
1, CAN bus data resolution module receives the signal message in electromobile CAN bus, and parses electricity
The information such as machine/engine rotational speed signal, accelerator pedal signal, motor/engine load and speed.
2, simulation shift module is according to information such as motor speed signal, accelerator pedal signal, motor load and speed and interior
Set simulation strategy, simulate electromobile gear corresponding with conventional fuel oil car and engine speed information, and by these
Information is transferred to sound rendering module, and workflow is as shown in Figure 2.Since electromobile is the biography of single fixation mostly
Dynamic ratio, the effect for simulating shift module are that motor speed is scaled engine speed corresponding with conventional fuel oil car.Simulation is changed
The workflow of gear module is to calculate corresponding speed according to the motor speed received, while judging according to vehicle condition
It is presently in simulation gear, simulation upshift and downshift can be carried out if needed, correspondence can be calculated by speed and gear information
Engine speed (conventional fuel oil car without simulation shift module).
3, sound rendering module includes low speed caution sound mode and kinesthesia exhaust sound pattern, is believed according to engine speed
Breath synthesizes two class sound, and one kind is the harmonic order sound with engine speed strong correlation, another kind of for increase sound plumpness
With the random sound of wideband of natural sense, final synthetic video (composition principle such as Fig. 3 institute is can be obtained into the addition of these two types of sound
Show).The input of sound rendering module is engine speed.Sound rendering module will synthesize sound in terms of two, a side
Face is harmonic order sound relevant to engine speed, and such sound spectrum is relatively narrow, usually less than 1kHz, but it constitutes and starts
The main tone of machine exhaust sound.It on the other hand is the wider random sound of frequency spectrum, such sound can increase the plumpness of sound, make
Sound sounds more true nature.
4, digital signal sound obtained by sound rendering module is converted to playable analog signal sound by D A switch module
Sound.The output of sound rendering module is digital signal, can not be directly output to loudspeaker broadcasting.The effect of D A switch module
For digital audio signal is converted to analoging sound signal real-time continuously, and export to power amplifier module.
5, the resulting analog signal sound of D A switch module is carried out power amplification by power amplifier module, and is exported extremely
Loudspeaker module.
6, loudspeaker module plays out the sound by power amplification into vehicle-periphery.
By taking electric drive automobile as an example, the working method of this system is described in detail.CAN bus data resolution module drives from motor
Signal message is received at electrical automobile CAN bus and is parsed, these signals include motor speed, accelerator pedal position, motor
The information such as load and speed can define different vehicle behaviors using these information, correspond to inhomogeneity under different operating conditions
The sound of type, the implementation case only carry out operating condition explanation by taking motor speed signal as an example.Motor is usually connected with single speed gearbox,
There is no the gear information of similar conventional fuel oil car, it is therefore desirable to simulation shift is carried out, to realize bring due to gear variation
Sound variation.The major function for simulating shift module is exactly the engine speed being converted into motor speed under different gears,
Working principle is that motor speed is converted into real-time speed according to transmission ratio and diameter of tyres first.Shifting is simulated formulating
When, need to select reference vehicle of the specific conventional fuel oil car as shift, table 1 is corresponding for certain conventional fuel oil vehicle difference gear
Vehicle speed intervals, upshift strategy be low gear accelerate, upshift is carried out when engine speed reaches 2000 turns, so critical point
Speed when speed is 2000 turns of various gears.If vehicle is just to have started, speed is just zero, is set as idling work at this time
Condition.When vehicle accelerates, the condition of satisfaction " 0km/h < vehicle velocity V≤18km/h ", what is simulated at this time is 1 gear operating condition, when speed continues
Rise, speed is once greater than 18km/h, is then upgraded to 2 gears, as long as speed is lower than 27km/h to speed at this time, then being always maintained at
In 2 gears.If vehicle deceleration at this time, speed is once less than 18km/h, then is reduced to 1 gear.The rest may be inferred, according to vehicle current vehicle speed
With gear information, simulation upshift and downshift can be carried out.
Table 1
| Vehicle condition | Idling | 1 gear | 2 gears | 3 gears | 4 gears |
| Vehicle velocity V (km/h) | 0 | 0 V≤18 < | 18 V≤27 < | 27 V≤40 < | 40 V≤50 < |
| Vehicle condition | 5 gears | 6 gears | 7 gears | 8 gears | |
| Vehicle velocity V (km/h) | 50 V≤66 < | 66 V≤84 < | 84 V≤99 < | 99 < V |
It simulates shift module and calculated engine speed is sent to sound rendering module.Sound rendering module will be with hair
Motivation revolving speed is that input synthesizes harmonic order sound and the random sound of wideband.The input of harmonic order sound is corresponding with engine speed
Harmonic frequency f0、f1、f2..., harmonic amplitude A0、A1、A2... and harmonic phase ..., execute Fu
In leaf inverse transformation and each harmonic wave superposition can be obtained to the digital signal of harmonic order sound.It should be noted that harmonic wave herein
Frequency f0、f1、f2..., harmonic amplitude A0、A1、A2... and harmonic phase... numerical value is by target
Sound carries out Fourier transformation and obtains.The input of the random phonosynthesis 12 of wideband is filter parameter a0、a1、a2..., the filter
Wave device parameter is equally obtained by target sound by special filtering processing, and what is executed herein is the inverse operation with parameter extraction, with
Restore target sound.Synthetic sound corresponding with present engine revolving speed is can be obtained into harmonic order sound and the random sound addition of wideband
Sound.The sound is digital signal, can not directly play out, need to be converted to playable simulation by D A switch module
Common audio decoder chip can be used to realize in signal, D A switch module.The usual power of the analog signal converted is very
It is small, it can not effectively drive powerful loudspeaker module sounding, it is therefore desirable to which power amplifier module carries out power amplification, and power is put
The port number and power of big module are determined by number of loudspeakers and power of loudspeaker.
Claims (2)
1. a kind of sonification system of simulated engine exhaust sound, which is characterized in that including connecting with electromobile CAN bus
The CAN bus data resolution module connect, CAN bus data resolution module are sequentially connected sound rendering module, D/A switch mould
Block, power amplifier module, loudspeaker module；When the generating system is applied to electric drive automobile, CAN bus data resolution module
It is connect by simulation shift module with sound rendering module, when the generating system is applied to conventional fuel oil car, CAN bus data
Parsing module is directly connect with sound rendering module.
2. the sonification system of simulated engine exhaust sound as described in claim 1, which is characterized in that the sound rendering mould
Block includes low speed caution sound mode and kinesthesia exhaust sound pattern.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821015102.0U CN208715080U (en) | 2018-06-28 | 2018-06-28 | A kind of sonification system of simulated engine exhaust sound |
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| CN201821015102.0U CN208715080U (en) | 2018-06-28 | 2018-06-28 | A kind of sonification system of simulated engine exhaust sound |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110525364A (en) * | 2019-08-21 | 2019-12-03 | 中国第一汽车股份有限公司 | A kind of electric car active sonification system and its audio control method |
| CN111746397A (en) * | 2020-06-28 | 2020-10-09 | 中国第一汽车股份有限公司 | Rotating speed control method of active sound production system of electric automobile and vehicle |
| WO2021057876A1 (en) * | 2019-09-27 | 2021-04-01 | 苏州上声电子股份有限公司 | Pedestrian warning device system and pedestrian warning method |
| CN114506268A (en) * | 2022-02-09 | 2022-05-17 | 岚图汽车科技有限公司 | Electric vehicle warning sound control method and device and electric vehicle |
-
2018
- 2018-06-28 CN CN201821015102.0U patent/CN208715080U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110525364A (en) * | 2019-08-21 | 2019-12-03 | 中国第一汽车股份有限公司 | A kind of electric car active sonification system and its audio control method |
| CN110525364B (en) * | 2019-08-21 | 2021-05-14 | 中国第一汽车股份有限公司 | Active sounding system of electric automobile and sound control method thereof |
| WO2021057876A1 (en) * | 2019-09-27 | 2021-04-01 | 苏州上声电子股份有限公司 | Pedestrian warning device system and pedestrian warning method |
| CN111746397A (en) * | 2020-06-28 | 2020-10-09 | 中国第一汽车股份有限公司 | Rotating speed control method of active sound production system of electric automobile and vehicle |
| CN111746397B (en) * | 2020-06-28 | 2022-02-22 | 中国第一汽车股份有限公司 | Rotating speed control method of active sound production system of electric automobile and vehicle |
| CN114506268A (en) * | 2022-02-09 | 2022-05-17 | 岚图汽车科技有限公司 | Electric vehicle warning sound control method and device and electric vehicle |
| CN114506268B (en) * | 2022-02-09 | 2023-10-13 | 岚图汽车科技有限公司 | Control method and device for warning sound of electric vehicle and electric vehicle |
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Granted publication date: 20190409 Termination date: 20200628 |