CN110816400A - System and method for prompting running of electric automobile - Google Patents
System and method for prompting running of electric automobile Download PDFInfo
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- CN110816400A CN110816400A CN201910930722.XA CN201910930722A CN110816400A CN 110816400 A CN110816400 A CN 110816400A CN 201910930722 A CN201910930722 A CN 201910930722A CN 110816400 A CN110816400 A CN 110816400A
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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 system of electric automobile driving prompt tone, which comprises an integrated prompt loudspeaker, wherein the integrated prompt loudspeaker comprises: the device comprises a CAN communication module, an MCU module, a voice module, a power amplifier module and a loudspeaker module; the CAN communication module sends the acquired real-time driving information to the MCU module, the MCU module converts the received driving information into corresponding driving signals and sends the driving signals to the voice module, the voice module sends the audio signals corresponding to the driving signals to the power amplifier module, and the power amplifier module receives the audio signals and drives the loudspeaker module to send corresponding prompt tones.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a system and a method for prompting running of an electric automobile.
Background
China has promoted the position of new energy vehicles to the national strategic level, and electric vehicles have become the dominant force of new energy vehicle development as is well known. The pure electric vehicle is not provided with a traditional fuel engine and only drives the vehicle by an electric motor, so that pedestrians cannot perceive the approach of the vehicle in a noisy city besides slight electric sound during driving, and collision accidents of the vehicles and the pedestrians are caused.
When the new energy automobile starts or runs at a low speed, the noise is very low, the pedestrian is threatened, and the possibility of collision accidents is easy to happen. The national quality supervision administration and the national standard committee jointly release GB7258-2017 technical conditions for motor vehicle operation safety in 2017, 9 and 29, and are officially implemented in 2018, 1 and 1. The 12.13.2 th item in the standard clearly requires that pure electric vehicles and plug-in hybrid electric vehicles should be able to make appropriate prompting sounds to people outside the vehicle when the vehicle starts and the vehicle speed is lower than 20 km/h. In addition, the draft of the electric vehicle low speed prompting technical requirement clearly stipulates that the electric vehicle needs to give out prompting sound when the vehicle speed is 0 km/h-20 km/h and stipulates the requirement of sound limit value: meets the requirement of minimum sound limit and is less than or equal to 75dB (A). Therefore, in order to reduce the occurrence of collision accidents and improve the safety of the electric vehicle, a prompting device for low-speed electric vehicles is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system and a method for prompting the running of an electric automobile, so that the voice prompting function of the electric automobile during starting is realized, pedestrians and other vehicles on a road can be found in time conveniently, the integration level is high, and the platformization can be realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
a system of electric automobile driving prompt tones, comprising an integral prompt speaker, the integral prompt speaker comprising: the device comprises a CAN communication module, an MCU module, a voice module, a power amplifier module and a loudspeaker module;
the CAN communication module sends the acquired real-time driving information to the MCU module, the MCU module converts the received driving information into corresponding driving signals and sends the driving signals to the voice module, the voice module sends the audio signals corresponding to the driving signals to the power amplifier module, and the power amplifier module receives the audio signals and drives the loudspeaker module to send corresponding prompt tones.
Furthermore, the MCU module is also used for processing the scanned audio signals fed back by the power amplification module.
Further, the voice module samples, filters and amplifies the audio signal and sends the audio signal to the power amplifier module.
Furthermore, the power supply module and the switching power supply module are included, and the switching power supply module converts the power supply voltage provided by the power supply module into the power supply voltage required by the integrated prompt loudspeaker.
Further, the driving information includes driving speed and gear information.
Correspondingly, the method for prompting the running prompt tone of the electric automobile based on the running prompt tone system of the electric automobile is also provided, and comprises the following steps:
s1, receiving the running speed of a running vehicle in real time;
s2, judging a preset vehicle speed range of the received vehicle running speed;
and S3, sending out corresponding prompt tones according to the preset vehicle speed range obtained by judgment.
Further, the preset speed range includes a first vehicle speed range and a second vehicle speed range.
Further, the step S3 is specifically:
if the obtained vehicle running speed is within the first vehicle speed range, a prompt tone is given out;
and if the obtained vehicle running speed is in a second vehicle speed range, sending out a prompt tone and then gradually reducing the volume of the prompt tone.
Further, step S1 is preceded by:
s0, pre-storing the first vehicle speed range and the second vehicle speed range.
Further, the step S0 further includes pre-storing a sound source of the alert tone.
Compared with the prior art, the voice prompt system realizes the voice prompt function of the electric automobile during starting, is convenient for timely finding pedestrians and other vehicles on the road, has high integration level, and can realize platform.
Drawings
FIG. 1 is a system configuration diagram of an electric vehicle driving prompt tone according to one embodiment;
FIG. 2 is a schematic system diagram of a driving prompt tone of an electric vehicle according to a first embodiment;
fig. 3 is a flowchart of a method for prompting an electric vehicle driving prompt tone according to a third embodiment.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
The invention aims to provide a system and a method for prompting running of an electric automobile, aiming at the defects of the prior art.
Example one
A system of electric automobile driving prompt tone comprises an integrated prompt speaker, as shown in FIG. 1, the integrated prompt speaker comprises: the system comprises a CAN communication module 11, an MCU module 12, a voice module 13, a power amplifier module 14 and a loudspeaker module 15;
as shown in fig. 2, the CAN communication module, the MCU module, the voice module, the power amplifier module, and the speaker module are sequentially connected, and the MCU module is connected to the power amplifier module.
The CAN communication module sends the acquired real-time driving information to the MCU module, the MCU module converts the received driving information into corresponding driving signals and sends the driving signals to the voice module, the voice module sends the audio signals corresponding to the driving signals to the power amplifier module, and the power amplifier module receives the audio signals and drives the loudspeaker module to send corresponding prompt tones.
The CAN communication module 11 is used for transmitting the acquired real-time driving information to the MCU module.
The CAN is a controller local area network, belongs to the field of field buses, and is a serial communication network which effectively supports distributed control or real-time control, and the CAN bus is used for realizing data communication between an automobile internal control system and each detection and execution mechanism. The CAN bus is a field bus which has formed an international standard and has the characteristics of high communication rate, easy realization, high cost performance and the like.
The MCU module 12 is used for receiving the real-time driving information sent by the CAN communication module and processing the received driving information.
The MCU is a micro control unit, also called a single chip microcomputer or a single chip microcomputer, and is a computer with a chip level formed by properly reducing the frequency and specification of a central processing unit CPU and integrating peripheral interfaces such as a memory, a counter, a USB, an A/D conversion, a UART, a PLC, a DMA and the like, even an LCD driving circuit on a single chip, and performing different combination control for different application occasions. Such as mobile phones, PC peripherals, remote controls, to automotive electronics, industrial stepper motors, robotic arm controls, etc., see the silhouette of the MCU.
The driving information comprises driving speed and gear information, and the gear information comprises information of forward driving and reverse driving of the automobile.
The MCU is provided with a FLASH memory for storing a first preset vehicle speed range, a second preset vehicle speed range, sound source information set by a user and the like.
FLASH memory is also called FLASH memory, belongs to one type of memory devices, and is a nonvolatile memory. Can permanently retain data without current supply, and has storage characteristic equivalent to hard disk, and this characteristic is the basis of flash memory becoming storage medium of various portable digital devices
After the MCU module receives the real-time driving speed and gear information sent by the CAN communication module, the speed range of the current speed is judged, and a signal corresponding to the judged speed range is sent to the voice module.
The voice module 13 is configured to receive a signal sent by the MCU module, and process an audio signal corresponding to the driving signal, where the processing includes sampling, filtering, and EQ amplification.
In this embodiment, the voice module is a voice chip, and the voice chip converts a voice signal into a number through sampling, stores the number in a ROM of the IC, and restores the number in the ROM into the voice signal through a circuit.
The power amplifier module 14 is configured to receive the processed audio signal sent by the voice module, and amplify the received audio signal to drive the speaker to emit sound.
A power amplifier, referred to as "power amplifier" for short, refers to an amplifier that can generate maximum power output to drive a load (e.g., a speaker) under a given distortion rate. The power amplifier plays a role of 'organization and coordination' in the whole sound system, and governs to some extent whether the whole system can provide good sound quality output.
In this embodiment, the power amplifier module is further configured to scan and feed back the amplified audio signal to the MCU module, and the MCU module monitors whether the audio signal is a correct audio signal after receiving the audio signal fed back by the power amplifier module, and if so, does not process the audio signal; if not, the audio signal is adjusted.
The speaker module 15 is used to convert the received signal into an acoustic signal and send out a corresponding alert tone.
In the embodiment, when the first vehicle speed range is more than 0 and less than or equal to 20km/h, and the second vehicle speed range is more than 20km/h and less than or equal to 30km/h, the vehicle speed is preset.
When the received vehicle speed is within the first vehicle speed range, the purpose of warning is achieved by making a sound through a loudspeaker;
when the received vehicle speed is within the second vehicle speed range, the sound is gradually reduced after being emitted through the loudspeaker until the sound is stopped.
In practical situations, the speed of the automobile at the initial starting stage is possibly in a first speed range, and corresponding sound is emitted to warn other vehicles or pedestrians; when the running speed of the automobile reaches the second vehicle speed range, the sent prompt sound is gradually reduced until the sound production is stopped.
Still in this embodiment, still include power module, switched mode power module converts the mains voltage that power module provided into the required mains voltage of integral type suggestion speaker.
The sound prompt function of electric automobile when starting has been realized to this embodiment, and the road pedestrian and other vehicles of being convenient for in time discover and the integral type suggestion speaker integrated level of this embodiment is high, can realize the platformization.
Example two
The embodiment provides a prompting method based on an integrated prompting loudspeaker, as shown in fig. 3, including the steps of:
s11, receiving the running speed of a running vehicle in real time;
s12, judging a preset vehicle speed range of the received vehicle running speed;
and S13, sending out corresponding prompt tones according to the preset vehicle speed range obtained by judgment.
In this embodiment, step S11 is preceded by:
s10, pre-storing a first vehicle speed range and a second vehicle speed range; a sound source of a warning sound is stored in advance.
When the first vehicle speed range is more than 0 and less than or equal to 20km/h, and the second vehicle speed range is more than 20km/h and less than or equal to 30km/h, the vehicle speed is preset.
A sound source of a warning sound is stored in advance. In this embodiment, for example, 5 sound sources are stored in advance, where 5 include 3 forward and 2 reverse, and 1 sound source is set by default for each of forward and reverse; or the 1-type sound source can be set as a forward prompt sound or a reverse prompt sound. The number of the sound sources and the setting of the sound sources can be set by a user according to actual needs.
In this embodiment, the integrated prompt speaker is connected to the central control display screen in the cab, the facilities for sound source and the switching can be connected through the central control display screen, and the user can preview the prompt when switching
And sound is generated, so that the good driving experience requirements of customers are met.
In step S11, the travel speed of the traveling vehicle is received in real time.
The vehicle running speed acquired by the CAN communication module is received. In this embodiment, the CAN communication module may further obtain gear information of the vehicle, where the gear information includes information of forward movement and reverse movement of the vehicle. For example: the received traveling speed of the vehicle was 15km/h, and the vehicle was in a forward state. Step S12 is further performed.
In step S12, a preset vehicle speed range in which the received vehicle running speed is located is determined.
And when the vehicle running speed acquired by the CAN communication module is received, comparing the received speed with a preset vehicle speed range to obtain a comparison result, namely whether the received vehicle speed is in a first vehicle speed range or a second vehicle speed range. For example: and if the received running speed of the vehicle is 15km/h, the vehicle is in the first vehicle speed range. Step S13 is further performed.
It should be noted that the preset speed range includes a first vehicle speed range and a second vehicle speed range.
In step S13, a corresponding warning sound is generated according to the determined preset vehicle speed range.
The method specifically comprises the following steps: if the obtained vehicle running speed is within the first vehicle speed range, a prompt tone is given out;
and if the obtained vehicle running speed is in a second vehicle speed range, sending out a prompt tone and then gradually reducing the volume of the prompt tone.
In practical situations, the speed of the automobile at the initial starting stage is possibly in a first speed range, and corresponding sound is emitted to warn other vehicles or pedestrians; when the running speed of the automobile reaches the second vehicle speed range, the sent prompt sound is gradually reduced until the sound production is stopped.
In the embodiment, according to the actual situation, when the received vehicle speed is more than 0km/h and less than or equal to 1km/h, the prompt sound pressure is rapidly increased to 60 dB; when the vehicle speed is more than 1km/h and less than or equal to 20km/h, prompting sound pressure to rise from 60dB to 70 dB; when the vehicle speed is more than 20km/h and less than or equal to 30km/h, the prompting sound pressure is reduced to 0 from 70 dB.
The voice prompt function of the electric automobile during starting is realized, and pedestrians and other vehicles on the road can be found in time; the user of the embodiment can set the sound source, update the new sound source and meet the requirements of different users
The preference requirements of the user for the audio source.
EXAMPLE III
The difference between the first embodiment and the second embodiment of the present invention is that:
the present embodiment can adjust the status information of the integrated prompt speaker through the central control display screen connected to the integrated prompt speaker, wherein the status information includes on or off.
When the user wants to disable or turn on the prompt sound: through the soft switch setting of well accuse display screen, well accuse display screen sends corresponding signal and gives the integral type suggestion speaker, and the integral type suggestion speaker receives this signal, the sound of banning or opening integral type suggestion speaker. When the integral prompting loudspeaker is forbidden to be closed or opened, the integral prompting loudspeaker should send a corresponding signal to the central control display screen (or an instrument), and the central control display screen receives the corresponding signal of the integral prompting loudspeaker and starts or closes the prompt for the user.
This embodiment is through opening or the confinement of the sound of well accuse display screen control integral type suggestion speaker, has improved user's convenient to use nature, and can get into the confinement state when need not giving out the prompt tone, practices thrift the energy consumption and reduces simultaneously and generate heat.
The volume of the sound of the integrated prompt loudspeaker can be adjusted through the central control display screen.
When the vehicle runs at low speed in an external environment with low noise, the volume of the prompting sound can be reduced, and the vehicle can effectively remind surrounding personnel outside the vehicle and cannot cause excessive noise pollution to the environment; when the vehicle runs at low speed in a large environment with external environment noise, the sound pressure value of the prompt sound can be properly improved, the prompt sound can be guaranteed to be clear and distinguishable, and peripheral personnel outside the vehicle can be effectively reminded, so that the best prompt effect is achieved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a system of electric automobile warning sound that traveles, includes integral type suggestion speaker, its characterized in that, integral type suggestion speaker includes: the device comprises a CAN communication module, an MCU module, a voice module, a power amplifier module and a loudspeaker module;
the CAN communication module sends the acquired real-time driving information to the MCU module, the MCU module converts the received driving information into corresponding driving signals and sends the driving signals to the voice module, the voice module sends the audio signals corresponding to the driving signals to the power amplifier module, and the power amplifier module receives the audio signals and drives the loudspeaker module to send corresponding prompt tones.
2. The system of claim 1, wherein the MCU module is further configured to process the scanned audio signal fed back by the power amplifier module.
3. The system of claim 2, wherein the voice module samples, filters, amplifies and sends the audio signal to the power amplifier module.
4. The system of claim 1, further comprising a power module and a switching power module, wherein the switching power module converts a power voltage provided by the power module into a power voltage required by the integrated prompting speaker.
5. The system of claim 4, wherein the driving information comprises driving speed and gear information.
6. A method for prompting an electric vehicle driving prompt tone based on any one of claims 1 to 5, characterized by comprising the steps of:
s1, receiving the running speed of a running vehicle in real time;
s2, judging a preset vehicle speed range of the received vehicle running speed;
and S3, sending out corresponding prompt tones according to the preset vehicle speed range obtained by judgment.
7. The method as claimed in claim 6, wherein the preset speed range includes a first speed range and a second speed range.
8. The method for prompting the driving prompt tone of the electric vehicle according to claim 7, wherein the step S3 specifically comprises:
if the obtained vehicle running speed is within the first vehicle speed range, a prompt tone is given out;
and if the obtained vehicle running speed is in a second vehicle speed range, sending out a prompt tone and then gradually reducing the volume of the prompt tone.
9. The method for providing an electric vehicle driving prompt tone according to claim 7, wherein the step S1 is preceded by the steps of:
s0. prestores the first and second vehicle speed ranges.
10. The method as claimed in claim 9, wherein the step S0 further comprises pre-storing a sound source of the warning sound.
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| CN201910930722.XA CN110816400A (en) | 2019-09-29 | 2019-09-29 | System and method for prompting running of electric automobile |
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Application publication date: 20200221 |