CN108515904A - A kind of controlled automobile trumpet system and its working method - Google Patents
A kind of controlled automobile trumpet system and its working method Download PDFInfo
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- CN108515904A CN108515904A CN201810312525.7A CN201810312525A CN108515904A CN 108515904 A CN108515904 A CN 108515904A CN 201810312525 A CN201810312525 A CN 201810312525A CN 108515904 A CN108515904 A CN 108515904A
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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
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Abstract
A kind of controlled automobile trumpet system of present invention offer and its working method.The system includes camera, human-computer interaction display module, central control module and car horn module；Camera acquisition real-time road is shown on human-computer interaction display module, and user delimit target area and specified prompt tone on it；It is acoustic emission signal that central control module generates control information and modulation prompt tone according to target area；The acoustic emission signal of particular volume is converted to ultrasound by car horn module by ultrasonic transducer, and be emitted in air in the form of narrow beam, by the strong non-linear interaction of air, demodulate prompt tone, assigned direction pedestrian or vehicle is allowed to hear, and other directions be can't hear.The prompt tone direction that the car horn of the present invention is sent out is controllable, reduces the noise jamming to other direction unrelated populations；It can interactive multiple adjustment volume；Prompt tone wide variety, either conventional horn prompt tone, can also be the prompt tone of multiple personal.
Description
Technical field
The present invention relates to car horn technical fields, and in particular to a kind of prompt tone direction sent out, controllable, volume can
Tune, the optional automobile horn system of type and its working method.
Background technology
Car horn is to rise most directly to prompt watchful tool to pedestrian and other vehicles in running car.Car horn
It is typically designed as follows：One contact control switch is installed under the decorating film of steering wheel, when the pressure for giving this switch reaches
When to a certain degree, car horn is in running order.Currently, car horn is divided into two kinds by audio power：Electric horn and
Air horn.Electric horn is to make metallic membrane vibration to make a sound by being constantly powered and power off, and air horn is to pass through
The compression of air stream makes metallic membrane vibration make a sound.
Both car horns have the characteristics that common at present：First, the sound sent out is omnidirectional's diverging, non-directive.
This not only cannot be to specifically needing the crowd avoided to send out warning, but also returns other unrelated populations and bring interference and noise,
In addition after volume improves, the honk of high-decibel also causes noise pollution, keeps other people's mood irritated.Second is that can only send out
The honk of single volume.
Chinese patent literature discloses a kind of environmentally friendly vehicle directional loudspeaker application No. is 201410767279.6
System controls corresponding orientation loudspeaker to the pedestrian direction by the pedestrian near ultrasound examination vehicle after data processing
Sounding；On the other hand it is the communication transmission that tucket between vehicle is realized by dedicated short-range communication technology modules, the system is logical
Noise jamming to environment can be reduced by crossing above method.But the system still has improvements：1, the system requirements vehicle is pacified
16 supersonic detectors and 16 orientation loudspeaker are filled, not only there are certain difficulty in actual installation for device, but also install
Device it is excessive, cause a kind of waste to resource；2, the system realizes that watchful to the prompt of front vehicles is by special short
Communication between journey communication technology module is realized, so to realize that each automobile of the functional requirement must all install special short distance
Communication technology module, this is difficult to realize in practical applications；3, horn volume size is the distance arrived according to ultrasound examination
Information is adjusted, and such single Rule of judgment is inaccurate, and when appearing under same distance, object either child is also
It is adult, the volume of either a people or group, car horn are all identical, and such design lacks interaction
Property, flexibility and practicability.
Therefore, for the service condition and design direction for investigating obtained current car horn above, in order to more
Car horn is effectively applied, it is necessary to which design a set of relevant departments' regulation that can either meet disclosure satisfy that driver again simultaneously
Under complicated and diversified road conditions pedestrian and other vehicles are sent out with direction is controllable, volume is adjustable, the optional prompt tone of type
Horn system.
Invention content
The purpose of the present invention is to provide a kind of controlled automobile trumpet systems, overcome the directionless of orthodox car sound horn
The shortcomings that property and single volume, single sound type.In the present invention, first, driver can show mould by human-computer interaction
Block delimit target area realization and makes a sound prompt to assigned direction pedestrian or other vehicles.Second, either which kind of sound, drive
The person of sailing can active control loudspeaker prompt tone size, and volume control is continuous.Third, car horn is in addition to that can send out
It can be sent out personalized prompt tones such as " having vehicle, it is noted that evacuation " outside traditional loudspeaker prompt tone.
The purpose of the present invention is realized at least through one of following technical solution.
A kind of controlled automobile trumpet system, the system include camera, human-computer interaction display module, central control module and
Car horn module.The road real-time road of camera acquisition is shown on the display screen of human-computer interaction display module, is used
Person delimit target area by human-computer interaction display module, be to need to send out the assigned direction pedestrian of prompt tone or other vehicles
Region and specified prompt tone；Central control module generates control information according to target area and modulation prompt tone is sent out for audio frequency
Penetrate signal；The acoustic emission signal of particular volume is converted to ultrasound by car horn module by ultrasonic transducer, and with narrow wave
The form of beam is emitted in air, by the strong non-linear interaction of air in effective length, demodulates audible sound,
Assigned direction pedestrian or other vehicles is allowed to hear prompt tone, and other directions be can't hear.
The camera is the real-time road for shooting road, and all there are one cameras for user's root before and after vehicle body
According to needing to switch, real-time display is on the display screen of human-computer interaction display module.
The human-computer interaction display module marks target area by the interface user of interactivity（Pedestrian or vehicle
）, the direction propagation range for forming prompt tone, the sound type for selecting prompt tone, the volume for selecting prompt tone, by touching
Screen is touched to realize；It is marked on the real-time road picture that the direction propagation range of prompt tone is shown on the touchscreen by user
The location information induction of target area, touch point obtains；Voice selecting option is by traditional loudspeaker prompt tone and personalized prompt
Sound form, personalized prompt tone can oneself recording and storing in central control module；Volume adjustment can slide on touch screen
It touches dot and continuously adjusts volume.
The composition of the central control module includes：Control unit, voice signal generate unit, angle and distance calculates list
Member and a dismountable storage card.The major function of central control module includes：1. according on human-computer interaction display module
Information is acquired, includes the volume information of the sound type of the location information of target area, prompt tone, prompt tone, to control
The work of car horn module；2. controlling the unlatching of camera；3. storing the video of camera shooting to storage card, individual character is recorded
Change prompt tone to store.
The co-ordination of above-mentioned control unit control modules, controls the unlatching of camera, controls depositing for camera shooting and video
Storage controls the unlatching etc. of car horn module.
The above sound signal generation unit carries certain conventional horn according to the sound type of the prompt tone of user's selection
Show that sound or personalized prompt tone as sound signal, are then multiplied by corresponding carrier signal, become acoustic emission signal, frequency range
The frequency range supported by ultrasonic transducer.Meanwhile the volume information of the prompt tone according to user's selection, adjustment audio frequency hair
Penetrate the amplitude of signal.
Above-mentioned angle and distance computing unit, according to the target area that user marks on human-computer interaction display module,
The orientation range of specified prompt tone and the travel speed of current vehicle, calculate in actual environment target area relative to
The angle and distance of vehicle body is converted into the angle offset information of audio directional loudspeaker further according to the angle of calculating, according to calculating
Distance adjust the amplitude of acoustic emission signal again.
The personalized prompt tone that the video of above-mentioned dismountable storage card storage camera shooting and user record.
The car horn module includes 3 audio directional loudspeakers, rotary turnplate and angle control unit.Audio frequency directional
It is logical that loud speaker modulates the acoustic emission signal obtained after sound signal based on acoustic parametric arrays theory, to central control module
Ultrasonic transducer is crossed to be converted in ultrasound emission to air, by the strong non-linear interaction of air in effective length,
Demodulate audible sound.Since ultrasonic wave has very strong directive property, the region synergistic effect other than main propagation axis is very faint,
It eventually leads to audible sound and forms the acoustic beam with height directive property in main propagation axis direction, be the audio speaker by audible sound
It projects in a specified region, can just hear sound in this region.
Above-mentioned audio directional loudspeaker includes digital analog converter, power amplifier, ultrasonic transducer and physics focalizer,
Digital analog converter and power amplifier are placed in upper layer, and middle level is ultrasonic transducer and its back sheet, and lower layer is physics focalizer.It is super
The upper surface of sonic transducer is packaged with the backing that non-acoustic window material makes, and forms back sheet.It is obtained after modulation sound signal
Acoustic emission signal is sent to ultrasonic transducer after digital-to-analogue conversion and power amplification, is converted to ultrasonic wave by it, then surpasses
Sound wave forms narrow beam after being focused in physics focalizer, demodulates audible sound certainly by nonlinear interaction in air, to
It is heard on the direction that narrow beam is specified.
Above-mentioned physics focalizer is double-paraboloid body structure wide at the top and narrow at the bottom, and intersection is combined by a upper parabolical and lower parabola
The rotation of non-repetitive double-paraboloid line constitute, upper parabolical rotates to obtain wide paraboloid above, and lower parabola rotates to obtain down
The narrow paraboloid in face, upper parabolical and lower parabola are to share focus；Double-paraboloid body is fabricated to sound transparent layer using acoustic window material,
Outer layer applies non-sound transparent layer so that the ultrasonic wave that ultrasonic transducer generates only is propagated inside this double-paraboloid body；Ultrasonic transducer
Focus is gathered by reflection behind the sound transparent layer boundary of the wide paraboloid of ultrasonic wave arrival sent out, focus is sent out again as a point source
Ultrasonic wave, the ultrasonic wave sent out are sent out after reaching the sound transparent layer boundary of narrow paraboloid by parallel, this process has the aggregation of energy.
In addition, since wide paraboloid above is wide, narrow paraboloid below is narrow, can have narrower wave beam, transmitting range is allowed to reduce, tool
There are narrower directive property, positioning target group more accurate.
Above-mentioned rotary turnplate and angle control unit are used for controlling the angle of 3 audio directional loudspeakers rotation, in
The angle offset information work for entreating control module to send, angle control unit control rotary turnplate rotate corresponding audio frequency directional and raise
Sound device rotates to specified angle.The responsible range of each audio directional loudspeaker can be arranged, it is assumed here that each audio frequency is fixed
The range being responsible for loud speaker is set as 1200, after angle control unit receives the instruction of loudspeaker excursion angle information, look up
Go out the audio directional loudspeaker of corresponding responsible range, then be fine-tuning to specified angle, and it is allowed to start to work.Such as, 3 audio frequencies
Directional loudspeaker A, B, C, the ranging from 0-120 being each responsible for0, 1200-2400, 2400-3600, when needing to 134 degree of directions
Pedestrian sends out suggestion voice, then audio directional loudspeaker B works, and angle control unit controls it and is directed toward 134 degree.
Work step based on a kind of above-mentioned controlled automobile trumpet system is as follows：
（1）After automobile starting, system starts automatically.Central control module control unit sends control signal to camera.Camera shooting
It after head receives control signal, starts to work, starts storage and shoot the video in storage card.Meanwhile the real-time road that camera takes
Condition, which is transferred on human-computer interaction display module, carries out real-time display.
（2）When driver needs to send out alerting signal to other vehicles of front or pedestrian, shown by human-computer interaction
Module marks target area, selection inputs the sound type of prompt tone, inputs the volume of prompt tone, and transmits information to
Central control module.
（3）The voice signal of central control module generates the sound for the prompt tone that unit is obtained according to human-computer interaction display module
Then sound type is multiplied by corresponding carrier signal using certain conventional horn prompt tone or personalized prompt tone as sound signal,
Become acoustic emission signal.Meanwhile the volume information of the prompt tone according to user's selection, adjustment acoustic emission signal
Amplitude.
（4）The angle and distance computing unit of central control module calculates reality according to the travel speed of current vehicle
Angle and distance of the target area relative to vehicle body in environment is converted into audio directional loudspeaker needs further according to the angle of calculating
The angle of offset obtains angle offset information, is transmitted to the angle control unit of car horn module, again according to the distance of calculating
Adjust the amplitude of acoustic emission signal.
（5）After car horn mould angle control unit in the block receives angle offset information command, responsible pair is first selected
It answers an audio speaker in region to work, then controls rotary turnplate and rotate the audio speaker to assigned direction.
（6）Car horn mould digital analog converter in the block and power amplifier carry out acoustic emission signal digital-to-analogue and turn successively
It changes and is sent to ultrasonic transducer after power amplification, ultrasonic wave is converted to by it, then ultrasonic wave focuses in physics focalizer
After form narrow beam, in air by nonlinear interaction from demodulating audible sound, heard accordingly to the crowd of target area
Voice prompt.
Compared with prior art, the present invention has the following advantages：
（1）The acoustic emission signal of particular volume is converted to ultrasound by car horn of the present invention by ultrasonic transducer, and with narrow
The form of wave beam is emitted in air, by the strong non-linear interaction of air in effective length, demodulates audible sound
Wave allows assigned direction pedestrian or other vehicles to hear prompt tone, and other directions be can't hear, and be reduced to unrelated on other directions
The noise jamming of crowd.
（2）Car horn of the present invention is also utilized in addition to being oriented according to the acoustic parametric arrays theory of audio directional loudspeaker
Physics focalizer come realize ultrasonic energy under more narrow beam aggregation send.Wide paraboloid above physics focalizer is wide, under
The narrow paraboloid in face is narrow, can there is narrower wave beam, reduces transmitting range, to have narrower directive property, positions target person
Group is more accurate.
（3）The prompt tone volume that car horn of the present invention is sent out can interactive multiple control, according to the distance of target area and
Driver initiatively continuously adjusts the volume of car horn according to actual conditions to adjust volume, overcomes conventional horn not
Just the single ear-piercing noise pollution for controlling volume and bringing.
（4）The prompt tone wide variety that car horn of the present invention is sent out, either conventional horn prompt tone, can also be
Multiple personals prompt tones such as " having vehicle, it is noted that evacuation ".
（5）The present invention realizes real-time Transmission and the preservation of video, can be used as valuable driving road conditions reference, can be with
Merge the function of automobile data recorder.
Description of the drawings
Fig. 1 is the structure diagram of controlled automobile trumpet system of the present invention；
Fig. 2 is audio directional loudspeaker structural schematic diagram of the present invention；
Fig. 3 is the longitudinal section diagram of double projectile structure physics focalizers wide at the top and narrow at the bottom in audio directional loudspeaker of the present invention；
Fig. 4 is the structural representation of car horn module of the present invention；
Fig. 5 is the surface chart of the man-machine interactive display module of the present invention；
Fig. 6 is the work flow diagram of controlled automobile trumpet system of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings, but the implementation of the present invention is not limited to
This, if it is noted that following have not especially detailed description place, being skilled person can realize according to the prior art
Or understand.
As shown in Figure 1, being the structure diagram of controlled automobile trumpet system of the present invention.It is made of four parts：First, automobile loudspeaker
Module, including 3 audio directional loudspeakers, rotary turnplate and angle control unit, send out direction is controllable, volume is adjustable, kind
The optional prompt tone of class；Second is that central control module, including control unit, voice signal generate unit, angle and distance calculates
Unit and a dismountable storage card generate control information and generate unit generation sound to other modules, especially voice signal
Frequency transmits signals to the corresponding audio directional loudspeaker of car horn module and angle and distance computing unit generates target
The angle and distance in region is sent to the angle control unit of car horn module；Third, camera, shoots real-time road；Fourth,
Human-computer interaction display module obtains the information of driver's input, such as marks target area, input the sound type of prompt tone, carry
Show the volume information of sound, and display relevant information, the real-time road shot such as real-time display camera.
As shown in Fig. 2, being automobile audio directional loudspeaker structural schematic diagram of the present invention, including digital analog converter 201, power
Amplifier 202, ultrasonic transducer 203 and physics focalizer 204, are divided into three-decker, and 201 He of digital analog converter is placed on upper layer
Power amplifier 202, middle level are ultrasonic transducer 203 and its back sheet 205, and lower layer is physics focalizer 204.Ultrasonic transducer
The upper surface of with non-acoustic window material make backing be packaged, with prevent ultrasound from the back side propagate, formed back sheet 205.Modulation
The acoustic emission signal obtained after sound signal is sent to ultrasonic transducer after digital-to-analogue conversion and power amplification, by its conversion
For ultrasonic wave, then ultrasonic wave forms narrow beam after being focused in physics focalizer, is self solved in air by nonlinear interaction
Audible sound is recalled, to be heard on the direction that narrow beam is specified.
As shown in figure 3, being that the vertical of double projectile structure physics focalizers wide at the top and narrow at the bottom in audio directional loudspeaker of the present invention cuts
Face schematic diagram, the non-repetitive double-paraboloid line rotation that intersection is combined by a upper parabolical and lower parabola are constituted, upper parabolical
Rotation obtains wide paraboloid above, and lower parabola rotates to obtain following narrow paraboloid, and upper parabolical and lower parabola are altogether
With focus；Double-paraboloid body is fabricated to sound transparent layer using acoustic window material, and outer layer applies non-sound transparent layer so that ultrasonic transducer generated
Ultrasonic wave is only propagated inside this double-paraboloid body；The ultrasonic wave that ultrasonic transducer is sent out reaches the sound transparent layer boundary of wide paraboloid
Focus is gathered by reflection afterwards, focus sends out ultrasonic wave again as a point source, and the ultrasonic wave sent out reaches the saturating of narrow paraboloid
Sound layer is sent out behind boundary by parallel, forms sound-emanating areas, this process has the aggregation of energy.In addition, due to wide parabolic above
Body is wide, and narrow paraboloid below is narrow, forms narrower wave beam, and sound-emanating areas range shorter is allowed to be positioned with narrower directive property
Target group is more accurate.
As shown in figure 4, being the structural representation of car horn module of the present invention, including 3 audio directional loudspeakers, rotation turn
Disk and angle control unit.It is assumed that 3 audio directional loudspeakers（401、402、403）, each audio directional loudspeaker is negative
The range of duty is set as 1200, 401 responsible ranging from 0-1200, 402 responsible ranging from 1200-2400, 403 responsible ranges
2400-3600；Rotary turnplate 404 and angle control unit 405 are used for controlling the angle of 3 audio directional loudspeakers rotation.Rotation
Turntable and audio directional loudspeaker are connected by supporting rack 406 and are supported.Angle control unit is sent according to central control module
Angle offset information, judge and find out the audio directional loudspeaker of corresponding responsible range, then control rotary turnplate rotation
Corresponding audio directional loudspeaker rotates to specified angle and it is allowed to start to work.Such as, when needing to 1340The row in direction
Human hair goes out suggestion voice, then audio directional loudspeaker 402 works, and angle control unit control rotary turnplate rotation so that sound
Frequency directional loudspeaker 402 is directed toward 1340。
As shown in figure 5, being the surface chart of the present embodiment human-computer interaction display module；Intermediate region shows camera shooting
The real-time road of real-time road, front camera and rear camera shooting can show that driver can touch click with split screen display available or switching
Pedestrian in picture or vehicle mark target area, then the location information of target area are transferred to central control module.Lower section
Region is volume adjustment slider bar, can slide continuous control of the dot realization to volume；Right area include menu, determination,
It returns and this more 4 function keys, user can enter the sound type that selection loudspeaker play by menu bar.
As shown in fig. 6, being the work flow diagram of controllable automobile horn system of the invention.
（1）After automobile starting, system starts automatically.Central control module control unit sends control signal to camera.
It after camera receives control signal, starts to work, starts storage and shoot the video in storage card.Meanwhile the reality that camera takes
Shi Lukuang, which is transferred on human-computer interaction display module, carries out real-time display.
（2）When driver needs to send out alerting signal to other vehicles of front or pedestrian, shown by human-computer interaction
Module marks target area, selection inputs the sound type of prompt tone, inputs the volume of prompt tone, and transmits information to
Central control module.
（3）The voice signal of central control module generates the sound for the prompt tone that unit is obtained according to human-computer interaction display module
Then sound type is multiplied by corresponding carrier signal using certain conventional horn prompt tone or personalized prompt tone as sound signal,
Become acoustic emission signal.Meanwhile the volume information of the prompt tone according to user's selection, adjustment acoustic emission signal
Amplitude.
（4）The angle and distance computing unit of central control module calculates reality according to the travel speed of current vehicle
Angle and distance of the target area relative to vehicle body in environment is converted into audio directional loudspeaker needs further according to the angle of calculating
The angle of offset obtains angle offset information, is transmitted to the angle control unit of car horn module, again according to the distance of calculating
Adjust the amplitude of acoustic emission signal.
（5）After car horn mould angle control unit in the block receives angle offset information command, responsible pair is first selected
It answers an audio speaker in region to work, then controls rotary turnplate and rotate the audio speaker to assigned direction.
（6）Car horn mould digital analog converter in the block and power amplifier carry out acoustic emission signal digital-to-analogue and turn successively
It changes and is sent to ultrasonic transducer after power amplification, ultrasonic wave is converted to by it, then ultrasonic wave focuses in physics focalizer
After form narrow beam, in air by nonlinear interaction from demodulating audible sound, heard accordingly to the crowd of target area
Voice prompt.
Claims (8)
1. a kind of controlled automobile trumpet system, it is characterised in that including camera, human-computer interaction display module, central control module
With car horn module；The road real-time road of camera acquisition is shown on the display screen of human-computer interaction display module, is made
User delimit target area by human-computer interaction display module, be to need to send out the assigned direction pedestrian of prompt tone or other vehicles
Region and specified prompt tone；It is audio frequency that central control module generates control information and modulation prompt tone according to target area
Emit signal；The acoustic emission signal of setting volume is converted to ultrasound by car horn module by ultrasonic transducer, and with narrow
The form of wave beam is emitted in air, and by the strong non-linear interaction of air in setting effective length, demodulating can
Sound wave is listened, assigned direction pedestrian or vehicle is allowed to hear prompt tone, and other directions be can't hear.
2. a kind of controlled automobile trumpet system according to claim 1, it is characterised in that human-computer interaction display module passes through friendship
The interface user of mutual property marks target area, the direction propagation range for forming prompt tone, the sound type for selecting prompt tone, choosing
The volume for selecting prompt tone is realized by touch screen；The direction propagation range of prompt tone by user on the touchscreen
The location information induction of the target area marked on the real-time road picture of display, touch point obtains；Voice selecting option is by passing
The loudspeaker prompt tone of system and personalized prompt tone form, and personalized prompt tone can be by being recorded and stored in central control module；
Volume adjustment can continuously adjust volume realization by sliding the touch dot on touch screen.
3. a kind of controlled automobile trumpet system according to claim 1, it is characterised in that the composition of central control module includes
Control unit, voice signal generate unit, angle and distance computing unit and a dismountable storage card；Control unit controls
The co-ordination of each unit and storage card in central control module；Voice signal generates unit, the prompt selected according to user
Then the sound type of sound is multiplied by corresponding carrier wave using certain conventional horn prompt tone or personalized prompt tone as sound signal
Signal becomes acoustic emission signal, the frequency range that frequency range is supported by ultrasonic transducer；According further to the prompt of user's selection
The volume information of sound adjusts the amplitude of acoustic emission signal.
4. a kind of controlled automobile trumpet system according to claim 3, it is characterised in that angle and distance computing unit, according to
The target area that user marks on human-computer interaction display module, the orientation range and current vehicle of specified prompt tone
Travel speed, calculate angle and distance of the target area relative to vehicle body in actual environment, changed further according to the angle of calculating
It is counted as the angle offset information of audio directional loudspeaker, adjusts the amplitude of acoustic emission signal again according to the distance of calculating.
5. a kind of controlled automobile trumpet system according to claim 1, it is characterised in that car horn module includes 3 audio frequencies
Directional loudspeaker, rotary turnplate and angle control unit；Rotary turnplate and angle control unit, which are used for controlling 3 audio frequency directionals, to be raised
The angle of sound device rotation：According to the angle offset information that central control module is sent, angle control unit controls rotary turnplate and turns
It moves corresponding audio directional loudspeaker and rotates to specified angle.
6. a kind of controlled automobile trumpet system according to claim 5, audio directional loudspeaker includes digital analog converter, power
Amplifier, ultrasonic transducer and physics focalizer, audio directional loudspeaker include three-decker, and digital analog converter is placed on upper layer
And power amplifier, middle level are ultrasonic transducer and its back sheet, lower layer is physics focalizer；The upper surface of ultrasonic transducer is with non-
The backing that acoustic window material makes is packaged, and forms back sheet；The acoustic emission signal obtained after modulation sound signal passes through number
Mould is converted and is sent to ultrasonic transducer after power amplification, is converted to ultrasonic wave by it, then ultrasonic wave is in physics focalizer
Narrow beam is formed after focusing, in air by nonlinear interaction from audible sound is demodulated, in the direction that narrow beam is specified
On be heard.
7. a kind of controlled automobile trumpet system according to claim 5, it is characterised in that physics focalizer is wide at the top and narrow at the bottom double
Paraboloid structure, the double-paraboloid line rotation that intersection is combined by a upper parabolical and lower parabola are constituted, and upper parabolical rotates
To wide paraboloid above, lower parabola rotates to obtain following narrow paraboloid, and upper parabolical and lower parabola are to share focus
, realize the aggregation of energy；In addition, since wide paraboloid above is wide, narrow paraboloid below is narrow, can there is narrower wave
Beam reduces transmitting range, has narrower directive property, positioning target group more accurate.
8. for a kind of any one of claim 1 ~ 7 working method of controlled automobile trumpet system, it is characterised in that including
Following steps：
（1）After automobile starting, system starts automatically；Central control module control unit sends control signal to camera；Camera shooting
It after head receives control signal, starts to work, starts storage and shoot the video in storage card；Meanwhile the real-time road that camera takes
Condition, which is transferred on human-computer interaction display module, carries out real-time display；
（2）When driver needs to send out alerting signal to other vehicles of front or pedestrian, pass through human-computer interaction display module
It marks target area, the sound type for selecting input prompt tone, input the volume of prompt tone, and transmit information to center
Control module；
（3）The voice signal of central control module generates the sound class for the prompt tone that unit is obtained according to human-computer interaction display module
Then type is multiplied by corresponding carrier signal, becomes using certain conventional horn prompt tone or personalized prompt tone as sound signal
Acoustic emission signal；Meanwhile the volume information of the prompt tone according to user's selection, adjust the width of acoustic emission signal
Degree；
（4）The angle and distance computing unit of central control module calculates actual environment according to the travel speed of current vehicle
Angle and distance of the middle target area relative to vehicle body is converted into audio directional loudspeaker and needs to deviate further according to the angle of calculating
Angle, obtain angle offset information, be transmitted to the angle control unit of car horn module, adjusted again according to the distance of calculating
The amplitude of acoustic emission signal；
（5）After car horn mould angle control unit in the block receives angle offset information command, first selects and be responsible for corresponding area
One audio speaker in domain works, and then controls rotary turnplate and rotates the audio speaker to assigned direction；
（6）Car horn mould digital analog converter in the block and power amplifier acoustic emission signal is carried out successively digital-to-analogue conversion and
It is sent to ultrasonic transducer after power amplification, ultrasonic wave is converted to by it, shape after then ultrasonic wave focuses in physics focalizer
At narrow beam, carried accordingly from audible sound is demodulated to which the crowd of target area hears by nonlinear interaction in air
Show sound.
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| CN109733279A (en) * | 2019-02-20 | 2019-05-10 | 合肥京东方光电科技有限公司 | Vehicle whistle system and method, vehicle |
| CN109795408A (en) * | 2019-01-17 | 2019-05-24 | 深圳市元征科技股份有限公司 | A kind of method for early warning and vehicle |
| CN110910667A (en) * | 2019-12-10 | 2020-03-24 | 江苏蒲公英无人机有限公司 | Vehicle reminding information transmission method based on sound waves |
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| CN114312560A (en) * | 2022-01-25 | 2022-04-12 | 海信集团控股股份有限公司 | Vehicle and horn control method thereof |
| CN114312560B (en) * | 2022-01-25 | 2024-04-02 | 海信集团控股股份有限公司 | Vehicle and horn control method thereof |
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