CN109591692A - Vehicle intelligent caution sound equipment for electric car - Google Patents

Vehicle intelligent caution sound equipment for electric car Download PDF

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Publication number
CN109591692A
CN109591692A CN201710915023.9A CN201710915023A CN109591692A CN 109591692 A CN109591692 A CN 109591692A CN 201710915023 A CN201710915023 A CN 201710915023A CN 109591692 A CN109591692 A CN 109591692A
Authority
CN
China
Prior art keywords
sound equipment
vehicle intelligent
simulation
caution sound
engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710915023.9A
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Chinese (zh)
Inventor
许广振
严国进
宋晓珏
刘建梅
黄剑龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai SIIC Transportation Electric Co Ltd
Original Assignee
Shanghai SIIC Transportation Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai SIIC Transportation Electric Co Ltd filed Critical Shanghai SIIC Transportation Electric Co Ltd
Priority to CN201710915023.9A priority Critical patent/CN109591692A/en
Publication of CN109591692A publication Critical patent/CN109591692A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q5/00Arrangement or adaptation of acoustic signal devices
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/75Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 for modelling vocal tract parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

The present invention provides a kind of vehicle intelligent caution sound equipment for electric car.The vehicle intelligent caution sound equipment includes horn coil component and the loudspeaker horn that connect with the horn coil component.The vehicle intelligent caution sound equipment further includes simulation tone generating device, the simulation tone generating device is connect with the loudspeaker horn, and corresponding simulation of engine voice signal is exported according to the current state of the motor of the electric car, the simulation of engine voice signal is issued by the loudspeaker horn.

Description

Vehicle intelligent caution sound equipment for electric car
Technical field
The embodiment of the present invention is related to a kind of intelligent caution sound equipment, in particular to a kind of for electric car Vehicle intelligent caution sound equipment.
Background technique
Traditional car horn is widely adopted on automobile as sound signalling device.In the driving process of automobile In, driver is as needed and regulation issues required acoustic signal, alerts pedestrian and causes other vehicles note that guaranteeing traffic Safety.
Electric car as new-energy automobile is using vehicle power supply as power, with motor driven wheels travel, due to ring Influence opposite orthodox car in border is smaller, and its prospects are considered optimistic wildly.But electric car is almost noiseless when traveling 's.This noiseless driving conditions make driver can not direct feeling to speed vehicle condition, while can not also remind passerby note that It is potential dangerous to exist.Therefore, it is necessary to increase caution sound for the electric car in traveling to warn pedestrian.Currently, vehicle Man made noise sonic source device is installed for security consideration and in the motor compartment of electric car additional in factory, in electric car starting and low Speed issues a kind of sound in exercising to remind passerby to take care.But such way exists to man made noise sonic source device Itself has higher requirements, and increases material cost, reduces the utilization rate of motor compartment, and can increase many harness in the car Etc. problems.
Summary of the invention
The present invention proposes a kind of vehicle intelligent caution sound equipment for electric car in view of the above problems.According to this The vehicle intelligent caution sound equipment of invention, the device of simulated engine sound is integrated into car horn, and via bus with The car body controller of electric car connects, to obtain the present situation of electric car, thus according to the present situation of electric car To issue corresponding simulation of engine sound.
According to an aspect of the invention, there is provided a kind of vehicle intelligent caution sound equipment for electric car.It is described Vehicle intelligent caution sound equipment includes horn coil component and the loudspeaker horn that connect with the horn coil component.It is described vehicle-mounted Intelligent caution sound equipment further includes simulation tone generating device, and the simulation tone generating device is connect with the loudspeaker horn, and root Corresponding simulation of engine voice signal is exported according to the current state of the motor of the electric car, the simulation of engine Voice signal is issued by the loudspeaker horn.
In an example, the simulation tone generating device includes single-chip microcontroller, there is storage unit in the single-chip microcontroller, described Memory cell contains engine condition analog sound data corresponding with the various states of motor.
In an example, the various states of the motor include motor starting state and motor it is more A rotary regimes.The corresponding engine condition analog sound data of each state in the various states.
In an example, the simulation tone generating device includes bus interface, and the single-chip microcontroller is connect by the bus Mouth is connect with the car body controller of the electric car.
In an example, the car body controller indicates the electricity to single-chip microcontroller transmission by the bus interface The current state output signals of the current state of motivation, the single-chip microcontroller is according to the current state output signals output engine simulated sound Signal.
In an example, the single-chip microcontroller has a processing unit, the processing unit and the storage unit and described Bus interface connection, the processing unit according to the engine condition analog sound data being stored in the storage unit and from The received current state output signals of bus interface, to determine and current electric motor state indicated by the current state output signals Corresponding simulation of engine voice signal.
Here, the memory cell of single-chip microcontroller contains several engine condition analog sound datas.The place of single-chip microcontroller It manages unit and is believed using stored engine condition analog sound data come operation synthesis (for example, interpolation arithmetic) and current state Number corresponding simulation of engine voice signal.In such manner, it is possible to be obtained according to several analog sound datas stored and electricity The corresponding simulation of engine voice signal of the real-time continuous state of motivation.
In an example, the simulation tone generating device further includes audio drive circuitry, the audio drive circuitry with The single-chip microcontroller connection, the engine condition analoging sound signal that the single-chip microcontroller is exported amplify.
In an example, the simulation tone generating device further includes loudspeaker, and the loudspeaker is located at the loudspeaker number Cylinder in and with the audio drive circuitry, to receive enlarged engine condition analoging sound signal.
In an example, the horn coil component includes the electromagnetic coil containing fixed core and the vibrating membrane containing dynamic iron core Piece.The vehicle intelligent caution sound equipment further includes driving circuit, and the driving circuit is connect with the electromagnetic coil, to institute Electromagnetic coil is stated to be driven.
In an example, the vehicle intelligent caution sound equipment further include protection circuit, the protection circuit with it is described Driving circuit connection, to be protected to the driving circuit.
In an example, the simulation tone generating device, the driving circuit, the protection circuit and the audio are driven Dynamic circuit is located on the same circuit board.
Vehicle intelligent caution sound equipment according to the present invention for electric car, by simulation of engine tone generating device with Traditional car horn is combined into one, and the simulated sound of the simulated engine sound as caution sound can be sent out by loudspeaker horn Out.In such manner, it is possible to warn pedestrian during electric automobile during traveling, cost is also reduced, reduces the harness in vehicle body.
Detailed description of the invention
Figure 1A -1F shows the whole of the vehicle intelligent caution sound equipment for electric car of embodiment according to the present invention Body structural schematic diagram.Wherein, Figure 1A is the main view of the vehicle intelligent caution sound equipment of embodiment according to the present invention;Figure 1B is The bottom view of the vehicle intelligent caution sound equipment of embodiment according to the present invention;Fig. 1 C is the vehicle-mounted of embodiment according to the present invention The top view of intelligent caution sound equipment;Fig. 1 D is the right view of the vehicle intelligent caution sound equipment of embodiment according to the present invention; Fig. 1 E is the left view of the vehicle intelligent caution sound equipment of embodiment according to the present invention;Fig. 1 F is along the line A-A in Figure 1A Sectional view.
Fig. 2 shows the main portions of the vehicle intelligent caution sound equipment for electric car of embodiment according to the present invention The schematic diagram divided.
Specific embodiment
The embodiment of the present invention is described referring to attached drawing.
Firstly, being illustrated to the term in the application.In this application, simulation of engine sound refers to and same state The conventional fuel oil automobile that the electric motor state of electric car under (for example, identical travel speed) is corresponding, simulates starts The simulated sound of machine.Engine condition analog sound data is indicated with the same state of electric automobile motor (for example, identical Revolving speed) corresponding, conventional fuel oil automobile engine analog sound data.Engine condition analoging sound signal is to indicate Corresponding with same state (for example, the same rotational speed) of electric automobile motor, simulation conventional fuel oil automobile engine mould Onomatopoeia sound signal.Here, loudspeaker horn is a composite structure, including loudspeaker cylinder and the shell being connected with loudspeaker cylinder.
Figure 1A -1F shows the whole of the vehicle intelligent caution sound equipment for electric car of embodiment according to the present invention Body structural schematic diagram.As shown in Figure 1B, for the vehicle intelligent caution sound equipment 1 of electric car include horn coil component 17, The loudspeaker horn 10 that is connect with horn coil component 17, the pedestal 12 being connect with loudspeaker horn 10 and total on pedestal 12 Line interface 14.As shown in fig. 1F, the horn coil component 17 includes the electromagnetic coil 24 containing fixed core and the vibration containing dynamic iron core Dynamic diaphragm 26.As shown in figs. ib and 1 c, loudspeaker horn 10 includes hollow cylinder 18 and the shell 20 above cylinder 18.Cylinder Body 18 is fixedly connected with shell 20.For example, cylinder 18 and shell 20 are connected by bolt, certain cylinder 18 and shell 20 can also To be connected by other suitable modes.As shown in Figure 1 C and 1D, cylinder 18 in the shape of a spiral and becomes larger, at its end Place's opening is maximum.Sound caused by horn coil component by vehicle intelligent caution sound equipment 1 is opened via cylinder 18 from this Mouth issues.Vehicle intelligent caution sound equipment 1 further includes loudspeaker, is located in shell 20 and is electrically connected with the circuit inside pedestal 12 It connects.In one implementation, loudspeaker issues simulation of engine sound corresponding with current electric motor state.The engine The hole on upper surface 22 that simulated sound passes through shell 20 issues.In another implementation, what loudspeaker issued starts Machine simulated sound can also be issued by the opening of 18 end of cylinder.As shown in Figure 1B and 1E, a part of bus interface 14 Inside pedestal 12, for being located at the outer of pedestal 12 with another part of the circuit connection inside pedestal 12, bus interface 14 Portion is connect for the car body controller with electric car.Bus interface 14 has multiple pins, and a portion pin is for passing Power transmission source signal, another pin are used to transmit the current state output signals of the current state corresponding to electric car.
The vehicle intelligent caution sound equipment 1 of embodiment according to the present invention passes through the vehicle body of bus interface 14 and electric car Controller connection, to receive current state output signals, such as such as current driving speed of instruction electric car from car body controller The current vehicle condition parameter of degree etc.Vehicle intelligent caution sound equipment 1 according to the present invention can be according to the current of electric car as a result, Vehicle condition and issue corresponding voice prompt or alarm sound.
Fig. 2 shows the main portions of the vehicle intelligent caution sound equipment for electric car of embodiment according to the present invention The schematic diagram divided.As shown in Fig. 2, for electric car vehicle intelligent caution sound equipment 1 include horn coil component 17 and with The loudspeaker horn 10 that the horn coil component 17 connects.Vehicle intelligent caution sound equipment 1 further includes simulation tone generating device 200.Simulation tone generating device 200 is connect with loudspeaker horn 10.Tone generating device 200 is simulated according to the motor of electric car Current state and export corresponding simulation of engine voice signal.Simulation of engine voice signal is issued by loudspeaker horn 10 Come.
Simulating tone generating device 200 includes single-chip microcontroller 21.Single-chip microcontroller 21 contains storage unit (not shown).Storage unit is deposited Contain engine condition analog sound data corresponding with the various states of the motor of electric car.Here, motor Multiple rotary regimes of starting state and motor of the various states for example including motor.Multiple rotary regimes of motor Each of rotary regimes correspond respectively to each of multiple travel speeds of automobile travel speed.For example, electronic vapour The current state of the motor of vehicle is starting state, then simulation of engine voice signal corresponding with the state is to indicate tradition The analoging sound signal of the starting state of the engine of fuel-engined vehicle.
Simulating tone generating device 200 includes bus interface 14.Single-chip microcontroller 21 passes through the vehicle of bus interface 14 and electric car Body controller 30 connects.The car body controller 30 of electric car is connected with multiple sensors of the situation for measuring automobile.It should The sensor of current driving speed of multiple sensors for example including measurement electric car.Car body controller 30 passes through bus interface 14 transmit the signal for indicating the situation of electric car to single-chip microcontroller 21, for example, indicating the current state of the current state of motor Signal.The current state output signals are, for example, the current rotating speed of motor corresponding with the current driving speed of automobile.Single-chip microcontroller 21 Corresponding simulation of engine voice signal is exported according to the current state output signals.For example, the state of current state output signals instruction is Starting state then exports the simulation of engine sound of corresponding with automobile starting, simulation conventional fuel oil automobile engine.
The processing unit (not shown) of single-chip microcontroller 21 is connect with storage unit and bus interface 14.Processing unit is according to from total The received current state output signals of line interface 14 and the engine condition analog sound data being stored in a storage unit determine with The corresponding simulation of engine voice signal of current electric motor state indicated by the current state output signals.For example, processing unit The one or more engine moulds being stored in a storage unit are selected according to from the received current state output signals of bus interface 14 Quasi- voice data, and calculated and current electric motor state phase using selected one or more simulation of engine voice datas Corresponding simulation of engine voice signal.
Here, several engine condition analog sound datas are stored in the storage unit of single-chip microcontroller 21.Single-chip microcontroller Processing unit is using stored engine condition analog sound data come operation synthesis (for example, interpolation arithmetic) and current state The corresponding simulation of engine voice signal of signal.Thereby, it is possible to be calculated according to several analog sound datas stored Simulation of engine voice signal corresponding with the real-time continuous state of engine.
In one embodiment, the storage unit of single-chip microcontroller 21 is stored with and vapour in the range of 0-30 kilometers/hour The corresponding multiple simulation of engine voice datas of vehicle travel speed.For example, the memory cell of single-chip microcontroller 21 contains and vapour It is 10 kilometers/hour of vehicle travel speed corresponding simulation of engine voice data D1, corresponding with 20 kilometers/hour of automobile driving speed Simulation of engine voice data D2 and simulation of engine voice data D3 corresponding with 30 kilometers/hour of automobile driving speed. The current state output signals obtained from vehicle body sensor 30 indicate motor speed signal corresponding with 25 kilometers/hour of speed.It is single The processing unit of piece machine 21 selects simulation of engine voice data D1-D3, and root according to the current state output signals from memory Carry out operation synthesis simulated sound number corresponding with present engine revolving speed according to selected simulation of engine voice data D1-D3 According to D4.Then, obtained analog sound data D4 is converted to corresponding simulation of engine voice signal and exported by single-chip microcontroller 21 The simulation of engine voice signal.
Simulating tone generating device 200 further includes audio drive circuitry 23.The processing of audio drive circuitry 23 and single-chip microcontroller 21 Unit connection, the engine condition analoging sound signal exported from single-chip microcontroller 21 is amplified.Simulation tone generating device 200 also wraps Include loudspeaker 25.Loudspeaker 25 is located in loudspeaker horn 10 and connect with audio drive circuitry 23, to receive enlarged start Machine state simulation voice signal.For example, loudspeaker 25 is located in the shell 20 of loudspeaker horn 10 and with the socket on shell 20 (not Show) electrical connection.Socket on shell 20 is electrically connected with the socket (not shown) on the circuit board in pedestal 12, and audio Driving circuit 23 is electrically connected with the socket on the circuit board in pedestal 12, and thus loudspeaker 25 is electrically connected with audio drive circuitry 23 It connects.Enlarged engine condition analoging sound signal is issued via loudspeaker 25 by loudspeaker horn 10.In a realization side In formula, engine condition analoging sound signal is issued via the gap on the surface of the shell 20 of loudspeaker horn 10.At another In implementation, engine condition analoging sound signal is issued via the cylinder 18 of loudspeaker horn 10.
The horn coil component 17 includes the electromagnetic coil 24 containing fixed core and the vibrating diaphragm containing dynamic iron core 26.It is vehicle-mounted Intelligent caution sound equipment 1 further includes driving circuit 15.Driving circuit 15 is connect with the electromagnetic coil 24 in horn coil component 17, To be driven to horn coil.Vehicle intelligent caution sound equipment 1 further includes protection circuit 16.Protect circuit 16 and driving circuit 15 connections, to be protected to driving circuit 15.
In one embodiment, tone generating device 200, driving circuit 15, protection circuit 16 and audio drive circuitry are simulated 23 are located on the same circuit board, so as to save space, reduce connection.It should be understood that according to specific example, Simulation tone generating device 200, driving circuit 15, protection circuit 16 and audio drive circuitry 23 can also be located at different circuit boards On.
According to the present invention, simulation of engine tone generating device and traditional car horn are combined into one, pass through loudspeaker number Cylinder issues the simulated sound of simulated engine sound.In this way, reducing costs, and reduce the harness in vehicle body.
It will be appreciated by those skilled in the art that each embodiment disclosed above can be in the situation without departing from invention essence Under make various changes and modifications.Therefore, protection scope of the present invention should be defined by the appended claims.

Claims (11)

1. a kind of vehicle intelligent caution sound equipment for electric car, which is characterized in that the vehicle intelligent caution sound equipment Include:
Horn coil component;
The loudspeaker horn being connect with the horn coil component;And
The simulation tone generating device connecting with the loudspeaker horn, the tone generating device of simulating is according to the electricity of the electric car The current state of motivation and export corresponding simulation of engine voice signal, the simulation of engine voice signal pass through the loudspeaker Horn issues.
2. vehicle intelligent caution sound equipment according to claim 1, which is characterized in that the simulation tone generating device includes Single-chip microcontroller, the single-chip microcontroller have storage unit, and the storage unit is stored with corresponding with the various states of the motor Engine condition analog sound data.
3. vehicle intelligent caution sound equipment according to claim 2, which is characterized in that the various states packet of the motor The starting state of motor and multiple rotary regimes of motor are included, wherein each state in the various states is corresponding One engine condition analog sound data.
4. vehicle intelligent caution sound equipment according to claim 3, which is characterized in that the simulation tone generating device includes Bus interface, the single-chip microcontroller are connect by the bus interface with the car body controller of the electric car.
5. vehicle intelligent caution sound equipment according to claim 4, which is characterized in that the car body controller passes through described Bus interface indicates the current state output signals of the current state of the motor to single-chip microcontroller transmission, the single-chip microcontroller according to The current state output signals output engine analoging sound signal.
6. vehicle intelligent caution sound equipment according to claim 5, which is characterized in that the single-chip microcontroller has processing single Member, the processing unit are connect with the storage unit and the bus interface, and the processing unit connects according to from the bus Mouthful received current state output signals and the engine condition analog sound data being stored in the storage unit, to determine and institute State the corresponding simulation of engine voice signal of current electric motor state indicated by current state output signals.
7. vehicle intelligent caution sound equipment according to claim 5, which is characterized in that the simulation tone generating device also wraps Audio drive circuitry is included, the audio drive circuitry is connect with the single-chip microcontroller, the engine shape that the single-chip microcontroller is exported The amplification of state analoging sound signal.
8. vehicle intelligent caution sound equipment according to claim 7, which is characterized in that the simulation tone generating device also wraps Loudspeaker is included, the loudspeaker is located in the loudspeaker horn and connect with the audio drive circuitry, enlarged to receive Engine condition analoging sound signal.
9. vehicle intelligent caution sound equipment according to claim 1, which is characterized in that the horn coil component includes containing The electromagnetic coil of fixed core and vibrating diaphragm containing dynamic iron core, the vehicle intelligent caution sound equipment further includes driving circuit, institute It states driving circuit to connect with the electromagnetic coil of the horn coil component, to drive the electromagnetic coil.
10. vehicle intelligent caution sound equipment according to claim 9, which is characterized in that further include protection circuit, the guarantor Protection circuit is connect with the driving circuit, to protect to the driving circuit.
11. vehicle intelligent caution sound equipment according to claim 10, the simulation tone generating device, driving electricity Road, the protection circuit and the audio drive circuitry are located on the same circuit board.
CN201710915023.9A 2017-09-30 2017-09-30 Vehicle intelligent caution sound equipment for electric car Pending CN109591692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710915023.9A CN109591692A (en) 2017-09-30 2017-09-30 Vehicle intelligent caution sound equipment for electric car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710915023.9A CN109591692A (en) 2017-09-30 2017-09-30 Vehicle intelligent caution sound equipment for electric car

Publications (1)

Publication Number Publication Date
CN109591692A true CN109591692A (en) 2019-04-09

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2713590Y (en) * 2004-07-05 2005-07-27 吴桂英 Permanent-magnetic polyphony automobile loudspeaker
CN201114736Y (en) * 2007-09-10 2008-09-10 莫长城 Car multi-voice horn
CN102602334A (en) * 2011-01-18 2012-07-25 株式会社电装 Vehicle approach warning apparatus
CN102862513A (en) * 2012-09-29 2013-01-09 苏州新昌科技有限公司 System and method for simulating running sound of motor vehicle
CN202686120U (en) * 2012-06-20 2013-01-23 浙江吉利汽车研究院有限公司杭州分公司 Electric vehicle noise analog device
CN204801628U (en) * 2015-07-16 2015-11-25 北京长城华冠汽车科技股份有限公司 Electric automobile's vocal suggestion device and electric automobile
CN106985741A (en) * 2017-01-22 2017-07-28 中国重汽集团济南动力有限公司 The multi-functional low speed speech simulation alarm set of pure electric automobile
CN206417114U (en) * 2016-11-14 2017-08-18 滁州松泽电器有限公司 A kind of electric vehicle low speed caution sound acoustical generator
CN207711909U (en) * 2017-09-30 2018-08-10 上海实业交通电器有限公司 Vehicle intelligent caution sound equipment for electric vehicle

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2713590Y (en) * 2004-07-05 2005-07-27 吴桂英 Permanent-magnetic polyphony automobile loudspeaker
CN201114736Y (en) * 2007-09-10 2008-09-10 莫长城 Car multi-voice horn
CN102602334A (en) * 2011-01-18 2012-07-25 株式会社电装 Vehicle approach warning apparatus
CN202686120U (en) * 2012-06-20 2013-01-23 浙江吉利汽车研究院有限公司杭州分公司 Electric vehicle noise analog device
CN102862513A (en) * 2012-09-29 2013-01-09 苏州新昌科技有限公司 System and method for simulating running sound of motor vehicle
CN204801628U (en) * 2015-07-16 2015-11-25 北京长城华冠汽车科技股份有限公司 Electric automobile's vocal suggestion device and electric automobile
CN206417114U (en) * 2016-11-14 2017-08-18 滁州松泽电器有限公司 A kind of electric vehicle low speed caution sound acoustical generator
CN106985741A (en) * 2017-01-22 2017-07-28 中国重汽集团济南动力有限公司 The multi-functional low speed speech simulation alarm set of pure electric automobile
CN207711909U (en) * 2017-09-30 2018-08-10 上海实业交通电器有限公司 Vehicle intelligent caution sound equipment for electric vehicle

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