KR20160109499A - Apparatus for analyzing automobile noise - Google Patents

Apparatus for analyzing automobile noise Download PDF

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Publication number
KR20160109499A
KR20160109499A KR1020150034001A KR20150034001A KR20160109499A KR 20160109499 A KR20160109499 A KR 20160109499A KR 1020150034001 A KR1020150034001 A KR 1020150034001A KR 20150034001 A KR20150034001 A KR 20150034001A KR 20160109499 A KR20160109499 A KR 20160109499A
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KR
South Korea
Prior art keywords
automobile
noise
sound
height
unit
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Application number
KR1020150034001A
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Korean (ko)
Inventor
이창수
박성진
이승배
Original Assignee
(주)수도프리미엄엔지니어링
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Priority to KR1020150034001A priority Critical patent/KR20160109499A/en
Publication of KR20160109499A publication Critical patent/KR20160109499A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

An automotive noise analysis apparatus is disclosed.
According to an embodiment of the present invention, a vehicle includes a chamber for enclosing an automobile for blocking ambient noise; A vibrator for providing vibration to the automobile; A sound unit installed apart from the automobile, for measuring a noise generated in the automobile when the automobile is excited; And an analyzer for receiving a signal from the sound unit and detecting a noise generation site of the automobile.

Description

[0001] APPARATUS FOR ANALYZING AUTOMOBILE NOISE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an automotive noise analyzer, and more particularly, to an automobile noise analyzer capable of detecting a noise position occurring in an automobile.

Generally, BSR (Buzz, Squeak, Rattle) among noise generated from a vehicle means local noise of a vehicle body or a structure caused by vibration.

First, a buzz is a locally generated noise caused by the surface vibration of the structure, and can occur on its own without touching.

A squeak occurs when two or more parts are slid on each other due to contact friction, resulting in a sharp noise.

Also, a rattle occurs when two or more parts collide with each other, and a hitting sound is generated by contact.

Since noise is known to be caused by vibration, BSR is known as noise or noise. Recently, the importance of automobile sensitivity has been emphasized. Therefore, performance of NVH (Noise, Vibration, Harshness) It is becoming an important measure.

However, BSR noise (hereinafter referred to as "noise") generated in an automobile is very difficult to accurately detect a noise occurrence site.

The car is subjected to repeated loads by the engine at all times while it is in operation. In recent years, the application of the sound absorbing material to automobiles and the improvement of the NVH performance and the appearance of electric vehicles have greatly reduced the noise generated by the automobile itself. As a result, the noise generated from the automobile is felt to be relatively larger, .

However, in the past, there was no way to accurately locate the position of noise generated in a car by objective data. This problem has been solved by a skilled person having a long experience by finding a noise by applying a lot of time.

Korean Patent Laid-Open No. 10-2003-89528 (November 22, 2003)

An embodiment of the present invention is to provide a vehicle noise analysis apparatus that can systematically and effectively find the position of a noise generated in an automobile by objective data and quickly resolve noise.

According to an embodiment of the present invention, a vehicle includes a chamber for enclosing an automobile for blocking ambient noise; A vibrator for providing vibration to the automobile; A sound unit installed apart from the automobile, for measuring a noise generated in the automobile when the automobile is excited; And an analyzer for receiving a signal from the sound unit and detecting a noise generation site of the automobile.

Further, the chamber forms a receiving space for accommodating the automobile, and at least one side of the chamber may be provided with a door through which the automobile can enter and exit.

In addition, the vibrator may be disposed at a lower portion of the automobile to have a lower body of the automobile.

The vibrator may be provided in a number corresponding to each wheel of the automobile to support the bottom of each wheel and provide vibration to each wheel.

The vibrator may include: a cylinder portion vertically adjustable to heighten the automobile from a floor to a predetermined height; And a pocket portion provided on the upper portion of the cylinder portion and having a curved surface shape toward the wheel so that the wheel is seated.

In addition, the sound unit may include a plurality of microphone portions facing each part of the automobile.

The sound unit may further include: a frame portion having a plurality of transverse members spaced apart in a height direction; A microphone unit installed on the transverse member so as to be spaced apart from each other in the transverse direction and the height direction; And a support for supporting the frame portion and for adjusting the height and the rotation angle of the frame portion.

In addition, the analyzer may classify the signal provided by the sound unit according to the sound level to find a noise generation site.

The display unit may further include a display unit for displaying the sound heights analyzed by the analyzing unit in a contour shape and displaying the heights in different colors according to contour lines.

According to the embodiment of the present invention, since the position of the noise generated in the automobile can be searched more systematically and effectively by objective data, anyone can quickly find and solve the noise generated in the automobile.

1 is a configuration diagram of a vehicle noise analysis apparatus according to an embodiment of the present invention;
FIG. 2 is a block diagram of an automotive noise analysis apparatus according to an embodiment of the present invention;
3 is a view illustrating a vibrator of an automobile noise analysis apparatus according to an embodiment of the present invention;
4 is a block diagram of a sound unit of a vehicle noise analysis apparatus according to an embodiment of the present invention.
5 is a diagram illustrating a noise form displayed on a display unit of a vehicle noise analysis apparatus according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description may form part of the detailed description of the invention.

However, the detailed description of known configurations or functions in describing the present invention may be omitted for clarity.

While the invention is susceptible to various modifications and its various embodiments, it is intended to illustrate the specific embodiments and the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

Hereinafter, an automotive noise analyzer according to an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram of a vehicle noise analysis apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of an automotive noise analysis apparatus according to an embodiment of the present invention.

1 and 2, an automotive noise analyzer according to an exemplary embodiment of the present invention may include a chamber 100, a vibrator 200, a sound unit 300, and an analysis unit 400 , And may further include a display unit 500 thereon.

The chamber 100 may be installed in a structure that surrounds the automobile 10 to block noise around the automobile to measure noise as shown in FIG.

The chamber 100 may be made of a material having a high sound insulating performance so that noise may not be introduced into the chamber 100, and a predetermined accommodation space may be formed to accommodate the automobile 10.

The shape of the chamber 100 is not limited. However, the shape of the chamber 100 may be hemispherical in order to efficiently measure the noise generated in the automobile 10. In addition, at least one side of the chamber 100 may be provided with a door 110 that can be opened and closed so that a vehicle can enter and exit the chamber. Only one door 110 may be provided, but two doors 110 and one door 110 may be provided at the front and at the rear, respectively.

The vibrator 200 may be installed inside the chamber 100 by providing vibration to the automobile 10 to induce artificial noise in the automobile.

When the vehicle 10 is placed inside the chamber 100 and the vehicle body vibrates with the vehicle 10 while the external noise is blocked, (For example, BSR noise) may occur in a place where the vibration of the structure occurs, a place where the vibration of the structure occurs, and the like.

The sound unit 300 is for measuring a noise generated in the vehicle when the automobile 10 is vibrating, and may be spaced apart from the automobile 10 within the chamber 100.

In addition, the analyzer 400 may perform an analysis operation to find a noise generation site of the automobile by receiving a signal from the sound unit 300. The sound unit 300 may convert the measured noise into a predetermined signal and provide the signal to the analysis unit 400. The analysis unit 400 receives the signal of the sound unit 300 and generates It is possible to precisely analyze the position of the noise.

Hereinafter, the above-described configurations will be described in more detail with reference to Figs. 3 to 5. Fig.

FIG. 3 is a view showing a vibrator of an automotive noise analysis apparatus according to an embodiment of the present invention, FIG. 4 is a view showing a sound unit of an automotive noise analysis apparatus according to an embodiment of the present invention, 1 is a diagram illustrating a noise pattern displayed on a display unit of an automotive noise analysis apparatus according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the vibrator 200 may be disposed at the lower portion of the vehicle to provide vibration to the vehicle, and may be provided with an external force to the vehicle body to provide the vehicle body.

At this time, the vibrator 200 may be provided in a number corresponding to each wheel 11 of the vehicle so that the lower body of the automobile is not damaged by the vibrator 200. [ Generally, since four wheels are provided in an automobile, four vibrators 200 may also be provided.

One vibrator 200 supports the lower portion of each wheel 11 and can provide a vibration to each wheel 11 to have a car body. Generally, since a shock absorber is mounted on a wheel of a vehicle, the vibration externally provided is partially attenuated and the vibration is transmitted to the vehicle body, so that the vehicle body can be protected without being damaged. In addition, since most of the noise generated in the vehicle body during driving is caused to be transmitted to the vehicle body through the wheels of the vehicle depending on the road environment, the fact that the vehicle is equipped with the wheel 11 through the vibrator 200, It is possible to simulate the noise generation condition as it is and to realize a situation very similar to the actual situation.

Here, the vibrator 200 may include a cylinder part 210 and a pocket part 220.

The cylinder portion 210 can be vertically adjusted in height to float the automobile from the floor to a predetermined height so that the lower portion of the car body does not contact the floor when the automobile is lifted.

The cylinder 210 can lift the automobile by receiving hydraulic or pneumatic pressure from the outside. When the automobile reaches a preset height, the automobile can be lifted up and down from the height. The configuration for lifting a specific object by using hydraulic or pneumatic pressure, moving quickly, and providing vibration is generally well known in the art, so that detailed description is omitted.

The pocket portion 220 is provided on the upper portion of the cylinder portion 210 and may have a curved surface shape facing the wheel so that the wheel 11 of the car can be seated. The curved surface shape of the pocket portion 220 may be set in consideration of the curvature radius of the car wheel. Preferably, the wheel portion is seated in the pocket portion 220 by partially covering the car wheel in the circumferential direction.

As shown in FIG. 1, the sound unit 300 may be provided in plurality to measure noise occurring in various parts of the vehicle. As shown in FIG. 4, And a plurality of microphone units 320 facing the respective portions of the microphone unit 320.

More specifically, the sound unit 300 may include a frame part 310, a microphone part 320, and a support part 330.

The frame unit 310 may include a plurality of transverse members 311 spaced apart from each other in the height direction. Accordingly, the transverse members 311 are arranged in multiple stages along the height direction, so that noise according to the height can be measured.

As shown in FIG. 4, in the embodiment according to the present invention, four horizontal members 311 are provided in the height direction, and at least two of the horizontal members 311 may be provided. Stage structure, but this is merely an example and can be appropriately changed as needed.

In addition, the microphone unit 320 is installed at a predetermined interval in the lateral direction and the height direction on the transverse member 311 provided in a multi-stage, and the noise generated in the specific region in which the sound unit 300 is installed is segmented and measured .

The support base 330 supports the frame unit 310 and adjusts the height of the frame unit 310 as well as the rotation angle of the frame unit 310. The support part 330 is provided with a frame part 310 provided with a microphone part 320 at a predetermined position so that the height of the frame part 310 can be adjusted in the vertical direction as required at the corresponding position, 320 can be adjusted. The structure of the support base 330 having the height adjustment function and the rotation angle adjustment function is generally similar to the known camera support base 330, so a detailed description thereof will be omitted.

Meanwhile, the analyzing unit 400 can analyze a noise generation point by dividing the signal according to a sound height (high or low) of each signal provided in the sound unit 300 when searching for a noise generation part of a car. For example, since the noise level is relatively higher than the surrounding noise level, the noise level can be estimated by analyzing the height of the measured sound level.

At this time, in the present embodiment, the sound level analyzed by the analyzing unit 400 is displayed in the form of contour lines 510 having the same sound heights connected to each other, and the display unit 500 for separating the sound heights by different colors according to the contour line 510 .

The display unit 500 displays a structure (for example, an automobile door) on which a noise is generated as shown in FIG. 5 so that a user can easily recognize a noise generation point, The contour line 510 represented by another is displayed so that the height of the noise can be easily discriminated at a glance. Therefore, the user can look at the display unit 500 to find the point K having the highest sound level from the corresponding part of the vehicle, and check the assembly or the coupling state to grasp the cause of the noise, and then the structure can be maintained or exchanged.

While the present invention has been described in connection with what is presently considered to be preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention is not limited thereto.

10: Car 11: Car wheels
100: chamber 110: chamber door
200: vibrator 210: cylinder part
220: Pocket unit 300: Sound unit
310: frame part 311:
320: microphone part 330: support
400: Analysis section 500: Display section
510: contour line

Claims (9)

A chamber enclosing the car to block ambient noise;
A vibrator for providing vibration to the automobile;
A sound unit installed apart from the automobile, for measuring a noise generated in the automobile when the automobile is excited; And
An analysis unit for receiving a signal from the sound unit and detecting a noise generation site of the automobile;
And a noise analyzer. The method according to claim 1,
Wherein the chamber forms a receiving space for receiving the automobile, and a door is provided on at least one side of the chamber so that the automobile can enter and exit. The method according to claim 1,
Wherein said exciter is disposed at a lower portion of said automobile and has a lower body of said automobile. The method of claim 3,
Wherein the exciter is provided in a number corresponding to each wheel of the automobile to support the bottom of each wheel and to provide vibration to each wheel. 5. The method of claim 4,
The exciter has,
A cylinder portion that is vertically height-adjusted to float the vehicle at a predetermined height from the floor; And
And a pocket portion provided on an upper portion of the cylinder portion and having a curved surface shape toward the wheel so that the wheel is seated. The method according to claim 1,
Wherein the sound unit includes a plurality of microphone portions facing each part of the automobile. The method according to claim 1,
The sound unit includes:
A frame portion having a plurality of transverse members spaced apart in a height direction;
A microphone unit installed on the transverse member so as to be spaced apart from each other in the transverse direction and the height direction; And
And a support member for supporting the frame portion and capable of adjusting a height of the frame portion and adjusting a rotation angle of the frame portion. The method according to claim 1,
Wherein the analyzing unit distinguishes a signal provided from the sound unit according to a sound height to find a noise generation site. 9. The method of claim 8,
Further comprising: a display unit for displaying the sound height analyzed by the analysis unit in a contour shape and displaying the heights in different colors according to contour lines.
KR1020150034001A 2015-03-11 2015-03-11 Apparatus for analyzing automobile noise KR20160109499A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109489956A (en) * 2018-12-07 2019-03-19 王佳颖 A kind of automobile door lock noise testing device
KR101951890B1 (en) * 2017-11-28 2019-06-03 주식회사 진 A system for measuring a noise including apparatus for vibration grnerating, and a method using the same
KR102071259B1 (en) * 2018-09-05 2020-01-30 엔브이에이치코리아(주) Equipment for measurement of squeak noise data

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200389528Y1 (en) 2005-04-06 2005-07-14 전광수 A keyboard pedestal of computer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200389528Y1 (en) 2005-04-06 2005-07-14 전광수 A keyboard pedestal of computer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101951890B1 (en) * 2017-11-28 2019-06-03 주식회사 진 A system for measuring a noise including apparatus for vibration grnerating, and a method using the same
KR102071259B1 (en) * 2018-09-05 2020-01-30 엔브이에이치코리아(주) Equipment for measurement of squeak noise data
CN109489956A (en) * 2018-12-07 2019-03-19 王佳颖 A kind of automobile door lock noise testing device
WO2020114244A1 (en) * 2018-12-07 2020-06-11 王佳颖 Automobile door lock noise testing apparatus

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