CN105383376B - A kind of new-energy automobile pedestrian's sound alarming device based on ambient sound feedback - Google Patents
A kind of new-energy automobile pedestrian's sound alarming device based on ambient sound feedback Download PDFInfo
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- CN105383376B CN105383376B CN201510878457.7A CN201510878457A CN105383376B CN 105383376 B CN105383376 B CN 105383376B CN 201510878457 A CN201510878457 A CN 201510878457A CN 105383376 B CN105383376 B CN 105383376B
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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 invention discloses a kind of new-energy automobile pedestrian's sound alarming device based on ambient sound feedback, including：Main control module（21）To speech chip module（22）Send play instruction, speech chip module（22）To power amplifier module（23）Voice signal is sent, by power amplifier module（23）Drive the speaker（27）Play voice signal；Environmental sound signal acquisition module（26）The sound pressure signal of external environmental sounds is sent to main control module（21）, main control module（21）Determined to play the volume of voice signal according to sound pressure signal, and be based on volume control power amplifier module（23）Power output.New-energy automobile pedestrian's sound alarming device of the present invention, can determine broadcast sound volume according to ambient sound, solve the problems, such as that the sound at night is larger and disturb residents, and solve the problems, such as there is a plosive in start, and volume modification is unsmooth the problem of out of stock.
Description
Technical field
The present invention relates to audible alarm technical field, more particularly to a kind of new-energy automobile row based on ambient sound feedback
People's sound alarming device.
Background technology
Modern society, automobile have become instrument essential in people's life, and private car and bus are convenient
The trip of people, automobile are substituting bicycle to turn into the vehicles important in people's life.In recent years, with global empty
The increasingly enhancing of gas pollution, various countries increasingly pay attention to the prevention and improvement of protection and the air pollution of environment, the row of vehicle exhaust
It is considered as one of main source of air pollution to put.New-energy automobile refers to using unconventional vehicle fuel as power resources
Or using conventional vehicle fuel, using novel on-vehicle power set, the technical principle of formation is advanced, has new technology, new construction
Automobile.With the rise of new-energy automobile, relative technology is also gradually developing.New-energy automobile uses new hair
Motivation drives, and the sound that it is sent is very small, and is flooded by ambient noise, so causes automobile to be in " Jing Yin a shape
State ", that is, sound is smaller during the traveling of new-energy automobile being present, is not easy to be found by pedestrian, easily causes asking for traffic accident
Topic, as long as long as also, automobile start just sounding always, and the loudness of sounding is fixed daytime and at night without any area
Not, same loudness can play pedestrian's warning function on daytime, the loudness environment more quiet feelings same to night
It is exactly that can become to disturb residents under condition.
The content of the invention
In view of this, the invention solves a technical problem be to provide it is a kind of based on ambient sound feedback new energy
Pedestrian sound alarming device, can efficiently solve the problem of above-mentioned.
A kind of new-energy automobile pedestrian's sound alarming device based on ambient sound feedback, including:Main control module, voice core
Piece module, power amplifier module and environmental sound signal acquisition module；The main control module is sent out to the speech chip module
Play instruction is sent, the speech chip module sends voice signal to the power amplifier module, by the power amplifier
Module drive loudspeaker plays the voice signal；The environmental sound signal acquisition module believes the acoustic pressure of external environmental sounds
The main control module number is sent to, the main control module determines to play the volume of the voice signal according to the sound pressure signal,
And the power output of the power amplifier module is controlled based on the volume.
According to one embodiment of present invention, further, in addition to：CAN transceiver module；The main control module passes through
The control device of the CAN transceiver module and new-energy automobile connects, and receives the shape that the control device of new-energy automobile is sent
State signal, including：Motor speed and GES；The main control module is based on status signal generation travelling data, and will
The travelling data is sent to the speech chip module, and the speech chip module is based on travelling data generation automobile and drawn
Hold up voice signal.
According to one embodiment of present invention, further, including：Anti- plosive circuit module；The anti-plosive electricity
Road module includes：Diode, first resistor, second resistance, NPN type triode, the first polarized electric capacity, 3rd resistor, the 4th
Resistance；One end ground connection of 4th resistance, the other end are connected with the emitter stage of the NPN type triode；Described first has pole
Property electric capacity and 3rd resistor it is in parallel, form the first sub-circuit；One end of the first resistor and one end of the second resistance connect
Connect, form the first tie point；One end of the diode is connected with power supply module or power amplifier module, the diode
The other end is connected with first tie point；The other end of the second resistance is connected with the colelctor electrode of the NPN type triode；
One end of first sub-circuit is connected with the other end of the first resistor, this tie point and the base of the NPN type triode
Pole connects；Second end of first sub-circuit be connected to the 4th resistance be used for be grounded connection line, the first electric current
One end of output line is connected on the connection line between the 4th resistance and the emitter stage of the NPN type triode, described
The other end of first current output line is connected with the loudspeaker；Wherein, electric current is entered by one end of the diode, is passed through
It is used to be charged to the first polarized electric capacity after the first resistor current limliting, now the NPN type triode presents high
Resistance state, when the voltage of the first polarized electric capacity reaches threshold value, the NPN type triode enters conducting state.
According to one embodiment of present invention, further, including：Volume control circuit module and RC shaping circuit moulds
Block；Pwm signal of the volume control circuit module generation with square wave, the pwm signal pass through described in the master control module controls
The RC shaping circuits module is sent to the power amplifier module after carrying out shaping, carries out the regulation of volume.
According to one embodiment of present invention, further, the RC shaping circuits module includes：5th resistance, the 6th
Resistance, the second polarity free capacitor, the 3rd polarity free capacitor；5th resistance is connected with second polarity free capacitor, described
One end of 5th resistance is connected with the volume control circuit module, one end ground connection of second polarity free capacitor；Described
Six resistance and the series connection of the 3rd polarity free capacitor, one end of the 6th resistance are connected to the 5th resistance and described second electrodeless
Property electric capacity between connection line on, one end of the 3rd polarity free capacitor ground connection；One end of second output line is connected to institute
State on the connection line between the 6th resistance and the 3rd polarity free capacitor, the other end is connected with the power amplifier module.
According to one embodiment of present invention, further, in addition to：Digital filter；The environmental sound signal is adopted
Collection module gathers the sound pressure signal of external environmental sounds and is sent to the main control module in real time；The main control module is by the sound
Pressure signal, which is sent in the digital filter, periodically to be sampled, and each sample is quantified and encodes generation number
Word signal, the data signal is converted into analog signal, this analog signal is handled and obtains sound pressure information.
According to one embodiment of present invention, further, the main control module monitors the control of the speech chip module
Pin BUSY processed, judge the time for the audio files that presently described speech chip module plays；When judging that the audio files broadcasts
When the remaining time put reaches default time threshold, then the master control module controls send to the speech chip module and played
The control instruction of next audio files.
According to one embodiment of present invention, further, the environmental sound signal acquisition module includes：Microphone is put
Big device MAX9812L, the 4th electric capacity, the 5th electric capacity and the 7th resistance；The signal that Mike collects passes through institute by incoming line respectively
State the 4th electric capacity, the 7th resistance is connected with IN pins, the BIAS pins of the amplifier of microphone MAX9812L, wherein,
IN pins are signal input pins, and BIAS pins are voltage compensation pin；The SHND pipes of the amplifier of microphone MAX9812L
Pin introduces voltage by the 5th capacity earth on the connection line between SHND pins and the 5th electric capacity,
The GND pins ground connection of the amplifier of microphone MAX9812L, the VCC pins access institute of the amplifier of microphone MAX9812L
Voltage is stated, the OUT pins of the amplifier of microphone MAX9812L export the signal after sending out greatly to the main control module.
According to one embodiment of present invention, further, the main control module passes through SPI with the speech chip module
Universal serial bus connects.
According to one embodiment of present invention, further, the speech chip module includes：Speech chip ISD2130；
Power supply module and the speech chip module, the power amplifier module connection line in piezo-resistance is set.
New-energy automobile pedestrian's sound alarming device based on ambient sound feedback of the present invention, using ambient sound conduct
The reference conditions of caution sound are sent, the plosive of upper electricity is solved using hardware circuit combination, completes to power amplifier chips volume
Regulation, by pre-recorded sound switching need the time, sound switching in advance this record time assign sound play life
Order, and then solve sound and switch problem out of stock.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only
Some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, also
Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 is one embodiment of new-energy automobile pedestrian's sound alarming device based on ambient sound feedback of the present invention
Electrical block diagram；
Fig. 2 is one embodiment of new-energy automobile pedestrian's sound alarming device based on ambient sound feedback of the present invention
Workflow schematic diagram；
Fig. 3 is one embodiment of new-energy automobile pedestrian's sound alarming device based on ambient sound feedback of the present invention
Anti- plosive circuit diagram；
Fig. 4 is one embodiment of new-energy automobile pedestrian's sound alarming device based on ambient sound feedback of the present invention
PWM volume shaping circuit schematic diagrames；
Fig. 5 is one embodiment of new-energy automobile pedestrian's sound alarming device based on ambient sound feedback of the present invention
Environmental sound signal acquisition module in Mike's amplifying circuit schematic diagram；
Fig. 6 is one embodiment of new-energy automobile pedestrian's sound alarming device based on ambient sound feedback of the present invention
Digital filter processing schematic diagram.
Embodiment
The present invention is described more fully with reference to the accompanying drawings, wherein illustrating the exemplary embodiment of the present invention.Under
The accompanying drawing that face will be combined in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, and shows
So, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on the reality in the present invention
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is all belonged to
In the scope of protection of the invention.Many descriptions are carried out to technical scheme with reference to figure and embodiment.
" first " hereinafter, " second " etc. is distinguish in description, not other special implications.
As shown in Figure 1, 2, the present invention provides a kind of new-energy automobile pedestrian sound based on ambient sound feedback and warns dress
Put, including:Main control module 21, speech chip module 22, power amplifier module 23 and environmental sound signal acquisition module 26.It is main
Control module 21 and send play instruction to speech chip module 22, speech chip module 22 sends sound to power amplifier module 23
Signal, voice signal is played by the drive the speaker 27 of power amplifier module 23.
Main control module can be implemented as microprocessor, single-chip microcomputer, single board computer etc..Main control module 21 and speech chip module 22
Connected by SPI universal serial bus etc..Power supply module 24 and speech chip module, power amplifier module connection line in set
Put piezo-resistance.
The sound pressure signal of external environmental sounds is sent to main control module 21, master control mould by environmental sound signal acquisition module 26
Block 21 determines the volume of broadcasting voice signal according to sound pressure signal, and based on the output work of volume control power amplifier module 23
Rate.May determine that whether the sound on periphery noisy by the sound pressure signal of external environmental sounds, if periphery is noisy or decibel very
High then VOLUME UP, if periphery is very quiet or decibel very little if reduce volume, can avoid disturbing residents etc. occurs.
Can monitoring of environmental in real time sound pressure level, the police of new-energy automobile pedestrian sound is determined according to the sound pressure level of surrounding
The showing device acoustic pressure size to be sent in itself, so around acoustic pressure average level it is smaller when, send less sound pressure level
With regard to pedestrian's warning function can be completed.
In one embodiment, main control module 21 passes through CAN transceiver module 25 and the control device 31 of new-energy automobile
Connection, the status signal that the control device 31 of new-energy automobile is sent is received, including：Motor speed and GES etc..Master control
Module 21 is based on status signal generation travelling data, and travelling data is sent into speech chip module 22, speech chip module
22 based on travelling data generation car engine voice signal, such as can be with simulated automotive in 40 kilometers, 80 kilometers of speed per hours hair
The different sound of motivation.
In one embodiment, anti-plosive circuit module is set in alarming device.As shown in figure 3, anti-plosive electricity
Road module includes：Diode 1, first resistor 2, second resistance 3, NPN type triode 4, the first polarized electric capacity 5,3rd resistor
6th, the 4th resistance 7.One end ground connection of 4th resistance 7, the other end are connected with the emitter stage of NPN type triode 4.First polarized electricity
Hold 5 and the parallel connection of 3rd resistor 6, form the first sub-circuit.One end of first resistor 2 connects with one end of second resistance 3, forms the
One tie point.
One end of diode 1 is connected with power supply module or power amplifier module 23, and the other end of diode 1 and first connects
Contact connects.The other end of second resistance 3 is connected with the colelctor electrode of NPN type triode 4.One end of first sub-circuit and the first electricity
The other end connection of resistance 2, this tie point are connected with the base stage of NPN type triode 4.
Second end of the first sub-circuit be connected to the 4th resistance 7 be used for be grounded connection line, the first current output line
One end be connected on the connection line between the 4th resistance 7 and the emitter stage of NPN type triode 4, the first current output line
The other end is connected with loudspeaker.Wherein, electric current is entered by one end of diode 1, by being used for after the current limliting of first resistor 2 to the
One polarized electric capacity 5 is charged, and now high-impedance state is presented in NPN type triode 4, when the voltage of the first polarized electric capacity 5 reaches
During to threshold value, NPN type triode 4 enters conducting state.
In one embodiment, pedestrian's warning of new-energy automobile is that the height for meeting vehicle body state and sound status is cut
Close, often because start can give loudspeaker one pulse signal, which results in meeting to give loudspeaker one instantaneous plosive,
Influence system quality.
Start anti-plosive circuit module, using hardware circuit delay and power supply electrifying moment in loudspeaker distorsion is eliminated
Leadage circuit, employ the influence to system that diode, high resistant electric capacity, triode combinational circuit suppress booting moment voltage.
System power supply is electric on POWER pins by controlling, and by being charged after 2 current limlitings to 5, now 4 high-impedance state, Remote is presented
Low level is presented.When the voltage of charging reaches 0.7 volt, 4 enter conducting, and 3,7 pairs of POWER voltages carry out partial pressure.Remote voltages
The Pwer voltages for being presented 99/100 are rendered as high level.
In one embodiment, volume control circuit module and RC shaping circuit modules are provided with alarming device.Such as Fig. 4
Shown, pwm signal of the master control module controls volume control circuit module generation with square wave, pwm signal passes through RC shaping circuits
Module is sent to power amplifier module after carrying out shaping, carries out the regulation of volume.
It regulation for the volume of sound, can be adjusted by the way of PWM mode composition algorithm, be related to PWM conversions
Into the process circuit of mean direct voltage.Volume adjusting is carried out using PWM mode to the power output controlling switch of power amplifier chips
The control of analog voltage output, resolution ratio up to 65536 gears, the square-wave signal of PWM signal send after by RC shapings
Circuit module produces an approximate DC level, similar to " potentiometer knob " voltage regulating mode, produces 1/65535 subdivision electricity
Pressure.
In one embodiment, RC shaping circuits module includes：5th resistance 8, the 6th resistance 9, the second polarity free capacitor
10th, the 3rd polarity free capacitor 11.5th resistance 8 is connected with the second polarity free capacitor 10, one end of the 5th resistance 8 and volume adjusting
Circuit module connects, one end ground connection of the second polarity free capacitor 10.
6th resistance 9 and the 3rd polarity free capacitor 11 are connected, and one end of the 6th resistance 9 is connected to the 5th resistance 8 and second
On connection line between polarity free capacitor 10, one end ground connection of the 3rd polarity free capacitor 11；One end connection of second output line
On connection line between the 6th resistance 9 and the 3rd polarity free capacitor 11, the other end is connected with power amplifier module.
In one embodiment, digital filter is set in alarming device.Environmental sound signal acquisition module 26 is adopted in real time
Collect the sound pressure signal of external environmental sounds and be sent to main control module 21.Sound pressure signal is sent to digital filtering by main control module 21
Periodically sampled in device, and each sample is quantified and encodes generation data signal, converted digital signals into
Analog signal, this analog signal is handled and obtains sound pressure information.
The circuit that sound intensity collection is carried out by Mike or microphone is added, the voltage collected is passed to master control dress
Put（Microprocessor）AD ends inside carry out digital filtering, the voltage of the acoustic pressure of set specific frequency signal is obtained, based on this magnitude of voltage
Control the sound pressure level to be sent.
Master control set（Microprocessor）AD ports receive the sound field magnitude of voltage of external environment condition because the sound of ambient noise
Pressure all concentrates on a certain specific frequency mostly, passes through master control set（Microprocessor）Inside carries out digital filtering algorithm, or sets
Independent digital filter is put, using the sound field of the sound of specific frequency as feedback reference voltage, is wanted according to magnitude of voltage control
The size of the acoustic pressure sent.
As shown in fig. 6, the acoustic pressure of environment is amplified into master control set by Mike or microphone（Microprocessor）AD
Thief hatch, digital filter can be sent to, the implementation process of digital filter is typically the analog signal digital input,
Namely the analog signal of input is periodically sampled, and each sample is quantified and encoded, be i.e. analog (A/
D) change;Prespecified processing, conversion are carried out from the data signal of A/D outputs, this is the core of whole filtering,
The existing a variety of filtering algorithms of generally use.The data signal of processor output is reconverted into analog signal, using D/A (D/
A) it is converted to the analog signal by digital filtering.
In one embodiment, from the digital filter of bandpass-type, cooked up specifically after observing frequency spectrum by oscillograph
Need frequency range, the frequency range needed, then cook up and adopt by the simulation of matlab softwares according to frequency range
Apparatus fluid filter model, finally matlab determine digital filter algorithm realize on CPU or other hardware, such as
CPLD etc., generate digital filter.
In one embodiment, speech chip module 22 includes：Speech chip ISD2130 etc..Main control module 21 monitors voice
The controlling switch BUSY of chip module 22.Judge the time for the audio files that current speech chip module plays.When judging sound
When the remaining time that file plays reaches default time threshold, then main control module 21 is controlled to send to speech chip module 22 and broadcast
Put the control instruction of next audio files.
Speech chip ISD2130 controlling switch BUSY is monitored, switched with oscillograph pattern to identify sound
Time, when carrying out sound switching shifting to an earlier date this time assigns play command, i.e., is just assigned before last time sound does not stop next
Secondary play command.Sound switching is completed without out of stock.For example, the broadcasting of sound carries out loop play using sound, when will
Sound can occur out of stock when carrying out sound switching, excite sound switching command using according to default time advance here.
Send sound switching command by playing chip to sound in advance, rather than waiting system finish playing after just perform
Sound switching command, it is out of stock to avoid the sound switching brought because order execution is delayed.For example, when sound plays, from monitoring
The interval for having that more than 20 milliseconds times do not wait is played by high level to low level sound to the end to BUSY, this interval is to lead
The main reason for causing sound out of stock.The time required for sound switching is recorded, this time is Millisecond, records handle after this time
This time, which is set to X, to be write in CPU EEPROM and preserves.When handover is needed, it is only necessary to which it is stopped according to the broadcasting of audio files
Before, X milliseconds assign the play command of next sound in advance.
In one embodiment, as shown in figure 5, environmental sound signal acquisition module includes：Amplifier of microphone
MAX9812LM1, the 4th electric capacity 16, the 5th electric capacity 17 and the 7th resistance 18.The signal that Mike 15 collects is distinguished by incoming line
It is connected by the 4th electric capacity 16, the 7th resistance 18 with amplifier of microphone MAX9812L IN pins, BIAS pins, wherein, IN
Pin is signal input pin, and BIAS pins are voltage compensation pin.
Amplifier of microphone MAX9812L SHND pins are grounded by the 5th electric capacity 17, and in SHND pins and the 5th
Voltage, amplifier of microphone MAX9812L GND pins ground connection, amplifier of microphone are introduced on connection line between electric capacity 17
MAX9812L VCC pins access voltage, amplifier of microphone MAX9812L OUT pins export the signal after sending out greatly to master control
Module 21.Main control module 21 can obtain the magnitude of voltage of the sound of 1000Hz or so frequencies, and caution sound is sent to feed back to set
Sound pressure level.
New-energy automobile pedestrian's sound alarming device based on ambient sound feedback of the present invention, is combined using hardware circuit
Mode completes the plosive that circuit delayed solves upper electricity, and it is complete that volume adjusting uses SCM PWM output to combine shaping circuit
The regulation of paired power amplifier chips volume, pre-recorded sound switching need the time, this time are written in CPU EEPROM,
In sound switching, this time recorded assigns sound play command in advance, and then solves sound and switch problem out of stock.Using specific
The voltage of the sound of frequency is as feedback, as the reference conditions for sending caution sound acoustic pressure.
New-energy automobile pedestrian's sound alarming device based on ambient sound feedback of the present invention, has following beneficial effect
Fruit：
1st, solve the problems, such as there is plosive when voice system is in start；
2nd, solving volume adjusting in audio output scheme relies on transmission and modification register just to obtain volume modification, and
And volume modification unsmooth has the problem of out of stock；
3rd, solve using relative out of stock switching problem of the low side speech play software in sound handoff procedure；
4th, solve the problems, such as that the sound at night is larger to disturb residents.
The method and system of the present invention may be achieved in many ways.For example, can by software, hardware, firmware or
Software, hardware, firmware any combinations come realize the present invention method and system.The said sequence of the step of for method is only
Order described in detail above is not limited in order to illustrate, the step of method of the invention, is especially said unless otherwise
It is bright.In addition, in certain embodiments, the present invention can be also embodied as recording program in the recording medium, these programs include
For realizing the machine readable instructions of the method according to the invention.Thus, the present invention also covering storage is used to perform according to this hair
The recording medium of the program of bright method.
Any technical scheme disclosed in the invention described above unless otherwise stated, if it discloses number range, then
Disclosed number range is preferable number range, it is any it should be appreciated by those skilled in the art：Preferable number range
The only obvious or representative numerical value of technique effect in many enforceable numerical value., can not because numerical value is more
Exhaustion, so the present invention just discloses component values to illustrate technical scheme, also, the above-mentioned numerical value enumerated is not
The limitation to the invention protection domain should be formed.
Meanwhile if the invention described above discloses or relate to the parts or structural member of connection fastened to each other, then, except another
There is statement outer, be fixedly connected and can be understood as：Can releasably it be fixedly connected（Such as use bolt or mode connects for screw）, can also
It is interpreted as：It is non-removable to be fixedly connected（Such as riveting, welding）, certainly, connection fastened to each other can also be integral type structure
（Such as manufactured using casting technique is integrally formed）Substituted（Substantially can not be using except integrally formed technique）.
In addition, the art for being used to represent position relationship or shape applied in any technical scheme disclosed in the invention described above
Its implication includes approximate with its, similar or close state or shape to language unless otherwise stated.Either component provided by the invention
Both can be to be assembled by multiple individually parts, or the separate part that integrally formed technique manufactures.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among the claimed technical scheme scope of the present invention.
Claims (9)
- A kind of 1. new-energy automobile pedestrian's sound alarming device based on ambient sound feedback, it is characterised in that including:Main control module (21), speech chip module (22), power amplifier module (23), anti-plosive circuit module and ambient sound Sound signal acquisition module (26)；The main control module (21) sends play instruction, institute's predicate to the speech chip module (22) Sound chip module (22) sends voice signal to the power amplifier module (23), is driven by the power amplifier module (23) Dynamic loudspeaker (27) plays the voice signal；The environmental sound signal acquisition module (26) is by the acoustic pressure of external environmental sounds Signal is sent to the main control module (21), and the main control module (21) determines that playing the sound believes according to the sound pressure signal Number volume, and control based on the volume power output of the power amplifier module (23)；The environmental sound signal Acquisition module gathers the sound pressure signal of external environmental sounds and is sent to the main control module in real time；The anti-plosive circuit module includes：Diode (1), first resistor (2), second resistance (3), NPN type triode (4), the first polarized electric capacity (5), 3rd resistor (6), the 4th resistance (7)；One end ground connection of 4th resistance (7) is another End is connected with the emitter stage of the NPN type triode (4)；The first polarized electric capacity (5) and 3rd resistor (6) are in parallel, shape Into the first sub-circuit；One end of the first resistor (2) connects with one end of the second resistance (3), forms the first tie point； One end of the diode (1) is connected with power supply module or power amplifier module (23), the other end of the diode (1) with The first tie point connection；The other end of the second resistance (3) is connected with the colelctor electrode of the NPN type triode (4)；Institute The one end for stating the first sub-circuit is connected with the other end of the first resistor (2), this tie point and the NPN type triode (4) Base stage connection；Second end of first sub-circuit be connected to the 4th resistance (7) be used for be grounded connection line, the One end of one current output line is connected to the connection between the emitter stage of the 4th resistance (7) and the NPN type triode (4) On circuit, the other end of first current output line is connected with the loudspeaker；Wherein, electric current passes through the diode (1) One end enter, by being used to be charged to the first polarized electric capacity (5) after the first resistor (2) current limliting, now High-impedance state is presented in the NPN type triode (4), described when the voltage of the first polarized electric capacity (5) reaches threshold value NPN type triode (4) enters conducting state.
- 2. alarming device as claimed in claim 1, it is characterised in that：Also include：CAN transceiver module (25)；The main control module (21) is connected by the CAN transceiver module (25) with the control device of new-energy automobile, is received The status signal that the control device of new-energy automobile is sent, including：Motor speed and GES；Main control module (21) base Travelling data is generated in the status signal, and the travelling data is sent to the speech chip module (22), institute's predicate Sound chip module (22) is based on travelling data generation car engine voice signal.
- 3. alarming device as claimed in claim 1, it is characterised in that：Including：Volume control circuit module and RC shaping circuit modules；Pwm signal of the volume control circuit module generation with square wave, the pwm signal pass through described in the master control module controls The RC shaping circuits module is sent to the power amplifier module after carrying out shaping, carries out the regulation of volume.
- 4. alarming device as claimed in claim 3, it is characterised in that：The RC shaping circuits module includes：5th resistance (8), the 6th resistance (9), the second polarity free capacitor (10), the 3rd nothing Polar capacitor (11)；5th resistance (8) is connected with second polarity free capacitor (10), one end and the sound of the 5th resistance (8) Amount regulation circuit module connection, one end ground connection of second polarity free capacitor (10)；6th resistance (9) and the series connection of the 3rd polarity free capacitor (11), one end of the 6th resistance (9) are connected to described the On connection line between five resistance (8) and second polarity free capacitor (10), the one of the 3rd polarity free capacitor (11) End ground connection；One end of second output line is connected to the connecting line between the 6th resistance (9) and the 3rd polarity free capacitor (11) Lu Shang, the other end are connected with the power amplifier module.
- 5. alarming device as claimed in claim 2, it is characterised in that：Also include：Digital filter；The sound pressure signal is sent in the digital filter and periodically sampled by the main control module, and to each Sample is quantified and encoded generation data signal, and the data signal is converted into analog signal, and this analog signal is carried out Handle and obtain sound pressure information.
- 6. alarming device as claimed in claim 5, it is characterised in that：The main control module monitors the controlling switch BUSY of the speech chip module, judges that presently described speech chip module is broadcast The time for the audio files put；When the remaining time for judging that the audio files plays reaching default time threshold, then institute State master control module controls and the control instruction for playing next audio files is sent to the speech chip module.
- 7. alarming device as claimed in claim 1, it is characterised in that：The environmental sound signal acquisition module includes：Amplifier of microphone MAX9812L (M1), the 4th electric capacity (16), the 5th electricity Hold (17) and the 7th resistance (18)；Mike (15) collect signal by incoming line respectively by the 4th electric capacity (16), the 7th resistance (18) with The IN pins of the amplifier of microphone MAX9812L, the connection of BIAS pins, wherein, IN pins are signal input pins, BIAS Pin is voltage compensation pin；The SHND pins of the amplifier of microphone MAX9812L are connect by the 5th electric capacity (17) Ground, and introduce voltage, the amplifier of microphone on the connection line between SHND pins and the 5th electric capacity (17) MAX9812L GND pins ground connection, the VCC pins of the amplifier of microphone MAX9812L access the voltage, the Mike Wind amplifier MAX9812L OUT pins export the signal after sending out greatly to the main control module.
- 8. alarming device as claimed in claim 1, it is characterised in that：The main control module is connected with the speech chip module by SPI universal serial bus.
- 9. alarming device as claimed in claim 1, it is characterised in that：The speech chip module includes：Speech chip ISD2130；Power supply module (24) and the speech chip module, the power amplifier module connection line in pressure-sensitive electricity is set Resistance.
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| CN105489063B (en) * | 2016-01-13 | 2018-04-13 | 吉林航盛电子有限公司 | A kind of new-energy automobile pedestrian's sound alarming device with active forewarning |
| CN106114352B (en) * | 2016-06-30 | 2022-02-11 | 智车优行科技（北京）有限公司 | Warning method and device based on electric vehicle and vehicle |
| CN106454634A (en) * | 2016-11-18 | 2017-02-22 | 深圳市航天华拓科技有限公司 | Environment sound detection-based barking stopping apparatus and barking stopping method |
| CN109177901B (en) * | 2018-09-12 | 2020-07-24 | 会听声学科技（北京）有限公司 | Customizable electric automobile simulation sounding method |
| CN109842839A (en) * | 2019-01-29 | 2019-06-04 | 惠州市华智航科技有限公司 | The loudness compensation method such as a kind of |
| CN114670750A (en) * | 2020-12-24 | 2022-06-28 | 上海汽车电驱动有限公司 | Sound wave simulation method for driving motor |
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