阅读说明：本技术 个人移动设备的扬声器系统及利用该扬声器系统的车辆扬声器系统 (Speaker system for personal mobile device and speaker system for vehicle using the same ) 是由 黄龙焕 于 2020-10-15 设计创作，主要内容包括：本发明涉及个人移动设备的扬声器系统及利用该扬声器系统的车辆扬声器系统。车辆扬声器系统使用个人移动设备的扬声器系统,所述个人移动设备的扬声器系统包括：主体、转向单元、车轮和控制器,所述主体配置为利用电池产生动力；所述转向单元连接至主体以调节行驶方向,并且扬声器安装在转向单元中；所述车轮安装在主体和转向单元上,并且通过主体产生的动力来转动；所述控制器配置为控制扬声器；其中在行驶时,扬声器产生虚拟引擎声音。(The present invention relates to a speaker system for a personal mobile device and a speaker system for a vehicle using the speaker system. A vehicle speaker system uses a speaker system of a personal mobile device, the speaker system of the personal mobile device comprising: a main body configured to generate power using a battery; the steering unit is connected to the main body to adjust a driving direction, and a speaker is installed in the steering unit; the wheels are mounted on the main body and the steering unit and are rotated by power generated from the main body; the controller is configured to control a speaker; wherein the speaker generates a virtual engine sound while driving.)

1. A speaker system of a personal mobile device, the speaker system comprising:

a body configured to generate power using a battery;

a steering unit connected to the main body to adjust a driving direction, and a speaker mounted in the steering unit;

wheels mounted on the main body and the steering unit and rotated by power generated from the main body; and

a controller configured to control the speaker;

wherein the speaker generates a virtual engine sound while driving.

2. The speaker system of the personal mobile device of claim 1, wherein the steering unit comprises: a stem portion and an acoustic transmission portion, the stem portion connected to the handle portion; the sound transmission part is disposed inside the rod part to transmit sound energy generated from the speaker.

3. The speaker system of the personal mobile device of claim 2, wherein one or more frequency adjusters protruding toward an inner center of the stem portion are provided in the acoustic transmission portion.

4. The speaker system of the personal mobile device of claim 3, wherein:

the one or more frequency adjusters include a first frequency adjuster, a second frequency adjuster, and a third frequency adjuster formed along an inner circumferential surface of the rod part;

the length between the first and second frequency adjusters and the length between the second and third frequency adjusters are different from each other.

5. The speaker system of the personal mobile device according to claim 2, wherein the speaker is mounted at one end of the rod part, and the steering unit includes a receiving part to receive the rod part and the speaker.

6. A vehicle speaker system utilizing the speaker system of the personal mobile device of claim 1, wherein the speaker system of the personal mobile device, when installed in a vehicle, is controlled by a vehicle controller installed in the vehicle.

7. The vehicle speaker system according to claim 6, wherein the main body, the steering unit, the wheels, and the controller are mounted in a housing provided in the vehicle, the housing being provided in the form of a housing to utilize acoustic energy transmitted through the speaker as a low-pitch frequency.

8. The vehicle speaker system according to claim 6, wherein the battery and the speaker are electrically connected to the vehicle through a connection portion provided in the vehicle, and a vehicle controller mounted in the vehicle controls the speaker through the connection portion.

Technical Field

The present invention relates to a speaker system of a personal mobile device and a speaker system of a vehicle using the same, and more particularly, to a speaker system of a personal mobile device and a speaker system of a vehicle using the same, in which speakers mounted on the personal mobile device generate virtual engine sound and assist vehicle speakers when the personal mobile device is mounted in the vehicle.

Background

Generally, a Personal Mobile Device (PMD) travels at an average speed of about 25Km/h using power of a motor driven by a battery, while a high-end personal mobile device may travel at a high speed of 40 to 60 Km/h.

However, due to the low-noise motor, it is difficult for the pedestrian to early recognize that the personal mobile device traveling at a high speed is approaching the pedestrian.

Therefore, in recent years, in addition to Electric Vehicles (EVs), it is also required to install a Virtual Engine Sound System (VESS) that generates a virtual engine sound in a personal mobile device driven by a motor in order to avoid a pedestrian accident.

An electric vehicle powers the vehicle with an electric drive motor operated by electric energy stored in a battery, and uses many components such as the battery and the electric drive motor, so that the size, capacity, and position of a subwoofer occupying the maximum volume in the vehicle may be reduced, and speaker performance may be degraded.

Disclosure of Invention

An aspect of the present invention provides a speaker system of a personal mobile device and a speaker system of a vehicle using the same, in which speakers mounted on the personal mobile device generate a virtual engine sound and assist vehicle speakers when the personal mobile device is mounted in the vehicle.

Additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

According to one aspect of the invention, a speaker system for a personal mobile device comprises: a main body configured to generate power using a battery; the steering unit is connected to the main body to adjust a driving direction, and a speaker is installed in the steering unit; the wheels are mounted on the main body and the steering unit and are rotated by power generated from the main body; the controller is configured to control a speaker, wherein the speaker generates a virtual engine sound while driving.

The steering unit may include: a stem portion connected to the handle portion and an acoustic transmission portion that may be disposed inside the stem portion to transmit acoustic energy generated from the speaker.

One or more frequency adjusters protruding toward the inner center of the rod part may be provided in the sound transmission part.

The one or more frequency adjusters may include a first frequency adjuster, a second frequency adjuster, and a third frequency adjuster formed along an inner circumferential surface of the rod part, and a length between the first frequency adjuster and the second frequency adjuster and a length between the second frequency adjuster and the third frequency adjuster may be different from each other.

The speaker may be installed at one end of the rod part, and the steering unit may include a receiving part to receive the rod part and the speaker.

According to another aspect of the present invention, a speaker system of a vehicle using a speaker system of a personal mobile device, wherein the speaker system of the personal mobile device is controlled by a vehicle controller installed in the vehicle when installed in the vehicle.

The main body, the steering unit, the wheels, and the controller may be mounted in a receiving part provided in the vehicle, and the receiving part may be provided in the form of a housing to utilize the acoustic energy transmitted through the speaker as a low pitch frequency.

The battery and the speaker may be electrically connected to the vehicle through a connection portion provided in the vehicle, and a vehicle controller mounted in the vehicle may control the speaker through the connection portion.

Drawings

Some and/or other aspects of the present invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram showing a speaker system of a personal mobile device and a speaker system of a vehicle using the speaker system according to an embodiment of the present invention;

FIG. 2 shows a speaker system of a personal mobile device according to an embodiment of the invention;

FIG. 3 shows a stem portion of a speaker system of a personal mobile device according to an embodiment of the present invention;

FIG. 4 illustrates the sound waves formed by the rod portion shown in FIG. 3;

FIG. 5 shows a stem according to another form of embodiment of the invention;

FIG. 6 illustrates the sound waves formed by the rod portion shown in FIG. 5;

fig. 7 shows a speaker system of a personal mobile device mounted on a vehicle according to an embodiment of the present invention.

Detailed Description

It should be understood that the term "vehicle" or "vehicular" or other similar terms as used herein generally includes motor vehicles, such as passenger automobiles including Sport Utility Vehicles (SUVs), buses, vans, various commercial vehicles, watercraft including various boats, ships, aircraft, and the like, and includes hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen powered vehicles, and other alternative fuel vehicles (e.g., fuels derived from non-petroleum sources). As referred to herein, a hybrid vehicle is a vehicle having two or more power sources, such as both gasoline-powered and electric-powered vehicles.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, values, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, values, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Throughout this specification, unless explicitly described to the contrary, the word "comprise", and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements. In addition, the terms "unit," "device," "means," and "module" described in the specification mean a unit for performing at least one of functions and operations, and may be implemented by hardware components or software components, and combinations thereof.

Furthermore, the control logic of the present invention may be embodied as a non-transitory computer readable medium on a computer readable medium, which includes executable program instructions executed by a processor or controller or the like. Examples of computer readable media include, but are not limited to, ROM, RAM, Compact Disc (CD) -ROM, magnetic tape, floppy disk, flash drive, smart card, and optical data storage. The computer readable medium CAN also be distributed over network coupled computer systems so that the computer readable medium is stored and executed in a distributed fashion, for example, by a telematics server or a Controller Area Network (CAN).

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, and may be embodied in other forms. In order to clearly explain the present invention, the drawings omit parts irrelevant to the description, and the width, length, thickness, etc. of the components may be exaggerated for convenience.

Hereinafter, a speaker system of a personal mobile device and a speaker system of a vehicle using the same according to an embodiment of the present invention will be described with reference to fig. 1 to 7.

Fig. 1 is a schematic diagram showing a speaker system of a personal mobile device and a speaker system of a vehicle using the same according to an embodiment of the present invention, and fig. 2 shows a speaker system of a personal mobile device according to an embodiment of the present invention.

Fig. 3 shows a stem portion of a speaker system of a personal mobile device according to an embodiment of the present invention, and fig. 4 shows sound waves formed by the stem portion shown in fig. 3.

Fig. 5 shows a stem according to another form of embodiment of the invention, and fig. 6 shows the sound waves formed by the stem shown in fig. 5.

Fig. 7 shows a speaker system of a personal mobile device mounted on a vehicle according to an embodiment of the present invention.

As shown in fig. 1 to 7, a speaker system 100 of a personal mobile device according to an embodiment of the present invention includes: a main body 110, a steering unit 120, wheels 130, and a controller 140.

The main body 110 serves as a foot pedal on which a user rides and generates power by a battery 111. The main body 110 drives a driver 112 (which is a motor) using power generated by a battery 111.

The main body 110 may have a predetermined strength to support the weight of a user, and may be provided in the form of a case in which a space to accommodate the battery 111, the controller 140, and the like is formed.

The steering unit 120 is connected to the main body 110 to adjust a traveling direction. The steering unit 120 includes a handle portion 121, a rod portion 122, a speaker 123, a receiving portion 124, and an open/close portion 125.

The handle section 121 is provided on the upper side of the steering unit 120 so that the steering unit 120 can be controlled by a user, and the handle section 121 may have a structure that is folded when mounted on the vehicle 200 by being connected to the lever section 122 by a hinge structure.

The lever portion 122 is connected to the handle portion 121 and extends or retracts by a predetermined length to assist the driving of a user holding the handle portion 121. The rod part 122 is provided with an acoustic transmission part 122a to transmit acoustic energy generated from the speaker 123. The rod portion 122 may be provided in a telescopic fashion, in which a plurality of tubes overlap to reduce the length of the receiving portion 124.

A speaker 123 is installed at the lower end of the rod part 122 to supply sound energy to the sound transmission part 122a, and the speaker 123 is controlled by the controller 140. While driving, the speaker 123 generates a virtual engine sound, and the output of the virtual engine sound may be controlled by the controller 140.

When installed in vehicle 200, speaker 123 may be controlled by controller 140 installed in the personal mobile device, and when installed in vehicle 200, speaker 123 may be controlled by vehicle controller 230 installed in vehicle 200.

The accommodating part 124 is connected to the rod part 122 at one end to prevent the extended or retracted rod part 122 from being separated, and the accommodating part 124 is provided in a hollow form such that the rod part 122 and the speaker 123 are accommodated in the accommodating part 124.

The opening/closing part 125 is disposed at the opposite side (i.e., at the upper end) of the lower end of the rod part 122 to which the speaker 123 is mounted, and transmits the acoustic energy supplied to the acoustic transmission part 122a to the outside of the acoustic transmission part 122 a. The opening/closing part 125 may be provided at one end of the lever part 122 in a sliding structure, a hinge structure, or a rotating structure, and a motor 125a is provided so that on and off may be controlled by the controller 140. When installed in the vehicle 200, the open/close portion 125 may be controlled by a vehicle controller 230 installed in the vehicle 200.

The wheels 130 are mounted on the main body 110 and the steering unit 120, and are rotated by power generated by the main body 110. Wheels 130 may be mounted on each of the main body 110 and the steering unit 120 to reduce the weight of the personal mobile device.

When the user moves using the personal mobile device, the controller 140 controls the speaker 123 and may generate a virtual engine sound through the speaker 123. The virtual engine sound may include a driving sound of the power device, such as an engine driving sound and a motor driving sound, and avoid a collision with a pedestrian by recognizing that the personal mobile device is approaching the pedestrian. When installed on vehicle 200, controller 140 may control speakers 123 independently, and may control speakers 123 in conjunction with a vehicle controller 230 provided in vehicle 200.

Hereinafter, the acoustic transmission portion 122a provided in the lever portion 122 will be described in detail. The sound transmitting part 122a is provided in the rod part 122 in the form of an empty space, and particularly, the sound transmitting part 122a may be formed in the rod part 122 in the form of a hollow tube. As shown in the following equation 1, the frequency characteristic of the acoustic transmission part 122a may be changed according to the length L of the rod part 122, and the length L of the rod part 122 is preferably 1m or more in consideration of the user's body and the bass frequency characteristic.

[ equation 1]

L: length of the rod part

λ: wavelength corresponding to frequency

n: number of repetitions of wavelength

The resonance frequency of the acoustic transmission part 122a may be expressed as equation 2. When the length of the rod part 122 is 1m, the resonance frequencies of the sound transmission part 122a may be 171.5Hz, 343Hz, and 514.5Hz, and when the resonance frequency of the speaker 123 is set to 100Hz, the final frequency characteristic curve is shown in fig. 4, indicating that the low frequency characteristic is satisfied. In FIG. 4, the horizontal axis represents frequency (unit: Hz), and the vertical axis represents sound pressure (unit: dB).

[ equation 2]

fn: resonant frequency

c: constant number

L: length of the rod part

n: number of repetitions of wavelength

That is, when the length of the rod part 122 is 1m or more and the resonance frequency of the speaker 123 is 100Hz, the vehicle speaker system using the personal mobility device according to the embodiment of the present invention can satisfy the low frequency characteristics required for the subwoofer of the vehicle 200.

One or more frequency adjusters 122b, 122c, and 122d protruding toward the inner center of the rod part 122 may be provided in the sound transmission part 122 a. The frequency adjusters 122b, 122c, and 122d may be provided in the form of partition walls protruding toward the inner center of the rod part 122, and may include a first frequency adjuster 122b, a second frequency adjuster 122c, and a third frequency adjuster 122 d.

The first, second, and third frequency adjusters 122b, 122c, and 122d are formed along the inner circumferential surface of the rod part 122, and the length between the first and second frequency adjusters 122b and 122c and the length between the second and third frequency adjusters 122c and 122d may be different from each other.

The resonance frequency of the acoustic transmission part 122a may be adjusted by the frequency adjusters 122b, 122c, and 122d, and the resonance frequency of the acoustic transmission part 122a adjusted by the frequency adjusters 122b, 122c, and 122d may be expressed as equation 3.

[ equation 3]

fn, m: resonant frequency

c: constant number

Lm: length of the rod or of the frequency regulator

n: number of repetitions of wavelength

In equation 3, Lm refers to the length of the rod part 122 or the length of the frequency adjusters 122b, 122c, and 122d, and particularly, L1 refers to the length of the rod part 122, L2 refers to the length between the speaker 123 and the first frequency adjuster 122b, L3 refers to the length between the speaker 123 and the second frequency adjuster 122c, and L4 refers to the length between the speaker 123 and the third frequency adjuster 122 d.

The resulting frequency characteristic is shown in fig. 6, so that it can be seen that the resonance frequency controlled by the frequency adjusters 122b, 122c, and 122d can ensure proper output of the audible sound wave.

That is, the resonance frequency of the acoustic transmission part 122a may be adjusted by the frequency adjusters 122b, 122c, and 122d, and the final frequency characteristic curve may be adjusted by adjusting the intervals between the frequency adjusters 122b, 122c, and 122 d.

In fig. 6, the horizontal axis represents frequency (unit: Hz), the vertical axis represents sound pressure (unit: dB), F _ spkr denotes the resonance frequency of the speaker, F1,1 denotes the resonance frequency of L1, F1,2 denotes the resonance frequency of L2, F1,3 denotes the resonance frequency of L3, and F1,4 denotes the resonance frequency of L4.

The vehicle speaker system according to the embodiment of the present invention may be provided by mounting the speaker system 100 of the personal mobile device on the vehicle 200.

The speaker system 100 of the personal mobile device is mounted in the vehicle 200 to assist the speaker of the vehicle 200, and the vehicle 200 is provided with an accommodating part 210, a connecting part 220, and a vehicle controller 230.

The accommodation portion 210 is provided in one space such as a trunk, a door, and a side panel of the vehicle 200, and the main body 110, the steering unit 120, the wheels 130, and the controller 140 are mounted in the accommodation portion 210. The receiving part 210 may be provided in the form of a housing to use acoustic energy transmitted through the speaker 123 as low frequency. The enclosure is a volumetric frame that holds the exoskeleton frame of the speaker system, which refers to the cabinet that mounts and houses each speaker unit in the speaker system.

The receiving part 210 may be provided in a form of being connected to a separate housing to improve the low-pitched tone characteristic of the speaker system of the vehicle by using the speaker 100 of the personal mobile device as a subwoofer.

The connection part 220 electrically connects the battery 111 and the speaker 123 to the vehicle 200, and transmits power and control signals to the battery 111 and the speaker 123. The connection part 220 may transmit the control signal to the speaker 123 using a wireless communication module, for example, may transmit the control signal to the speaker 123 using a bluetooth module.

The vehicle controller 230 controls the speaker 123 through the connection part 220, and may directly control the speaker 123 installed in the speaker system 100 of the personal mobile device according to the speaker output of the vehicle 200, or may indirectly control the speaker 123 through the controller 140 installed in the speaker system 100 of the personal mobile device.

The vehicle controller 230 may turn on the opening/closing part 125 by controlling the motor 125a installed in the opening/closing part 125, and may transmit the acoustic energy supplied to the acoustic transmission part 122a to the receiving part 210 by turning on the opening/closing part 125.

As is apparent from the above, the speaker system of the personal mobile device according to the embodiment of the present invention generates the virtual engine sound through the speaker while driving, so that it is possible to inform pedestrians that the personal mobile device is approaching and to previously avoid a pedestrian accident.

The vehicle speaker system using the speaker system of the personal mobile device according to the embodiment of the present invention assists the speaker of the vehicle by using the personal mobile device, so that the vehicle speaker system can be implemented using a small space.

In addition, since the speaker system of the personal mobile device is used to assist the speaker of the vehicle, the broadband characteristic of the speaker can be ensured with only one speaker.

Although the present invention has been described above with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made thereto without departing from the spirit and scope of the present invention as set forth in the appended claims.