KR20130056402A - Method and apparatus for measuring sandnoise for vehicle - Google Patents

Method and apparatus for measuring sandnoise for vehicle Download PDF

Info

Publication number
KR20130056402A
KR20130056402A KR1020110121991A KR20110121991A KR20130056402A KR 20130056402 A KR20130056402 A KR 20130056402A KR 1020110121991 A KR1020110121991 A KR 1020110121991A KR 20110121991 A KR20110121991 A KR 20110121991A KR 20130056402 A KR20130056402 A KR 20130056402A
Authority
KR
South Korea
Prior art keywords
noise
measuring
vehicle
sand
signal
Prior art date
Application number
KR1020110121991A
Other languages
Korean (ko)
Inventor
이종호
Original Assignee
현대자동차주식회사
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 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020110121991A priority Critical patent/KR20130056402A/en
Publication of KR20130056402A publication Critical patent/KR20130056402A/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
    • G01D1/02—Measuring arrangements giving results other than momentary value of variable, of general application giving mean values, e.g. root means square values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles

Landscapes

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

Abstract

A measuring step of changing the noise measured through the microphone into an electric energy signal; A filtering step of filtering the measured signal with a band pass filter in a 3000 to 10000 Hz band; And a sand noise measuring method and apparatus for converting the filtered signal into loudness, which is negative energy.

Description

Sand noise measurement method and apparatus of vehicle {METHOD AND APPARATUS FOR MEASURING SANDNOISE FOR VEHICLE}

The present invention relates to a method and apparatus for measuring sand noise of a vehicle, which makes it possible to express the sand noise of the vehicle sensibly.

As the demand for emotional quality of the vehicle is improved, the sand noise problem, which is the chipping noise generated during driving, is known through overseas quality problems or domestic Internet community bulletin boards, so it is necessary to develop sand noise performance. This is necessary. However, when measured using a conventional general sound level meter there is a problem that can not quantitatively represent or compare the sand noise level. This is because the noise filter applied to the existing instrument does not reflect the sand noise noise characteristics.

The present invention relates to a program (circuit logic) for quantitatively measuring the chipping noise level generated while driving a vehicle. Therefore, the object of the present invention is to quantitatively measure the noise of the sand through the hearing correction circuit designed to measure the noise level of the sand noise.

FIG. 1 is a comparison graph of sand noises measured by a conventional sound level meter. As shown in the graph, the hearing correction circuit of a general noise meter does not reflect sound quality characteristics of chipping noise. Not suitable for measurement In fact, when a vehicle with a different level of noise noise is measured with a general silencer, the measured value is inconsistent with the actual hearing as shown in the result, and there is no discrimination in the measurement of sand noise so that it is difficult to distinguish between the specifications of the vehicle. will be.

Therefore, it was possible to develop a vehicle for the reduction of sand noise when the problem of improving the problem to accurately measure and quantitatively represent and distinguish sand noise has been solved.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

The present invention has been proposed to solve the above problems, and provides a method and apparatus for measuring sand noise of a vehicle capable of quantitatively measuring sand noise noise through an auditory correction circuit designed to measure the sand noise noise level. There is a purpose.

Sand noise measuring method of a vehicle according to the present invention for achieving the above object, the measuring step of changing the noise measured through the microphone into an electrical energy signal; A filtering step of filtering the measured signal with a band pass filter in a 3000 to 10000 Hz band; And a conversion step of converting the filtered signal into loudness which is sound energy.

The measuring step may further include an amplifying step of amplifying the electric energy signal.

The converting step may further include a derivation step of deriving the converted loudness values as an average value during the measurement time.

In the deriving step, the loudness values may be integrated during the measurement time and the average value may be derived by dividing the loudness values by the measurement time.

On the other hand, the measuring device for implementing the sand noise measuring method of the vehicle, the microphone for measuring the noise of the vehicle and converts the sound energy into an electrical energy signal; A filtering unit for extracting a 3000 to 10000 Hz band signal from the electrical energy signal with a band pass filter; And a conversion unit for converting the filtered signal into loudness which is sound energy.

It may further include; an amplifier for amplifying the electrical energy signal output from the microphone. The conversion unit may be configured to derive the converted loudness as an average value during the measurement time.

According to the sand noise measurement method and apparatus of the vehicle having the above-described structure, it is possible to quantitatively measure the sand noise noise through an auditory correction circuit designed to measure the sand noise noise level and to compare the objective differences. Become.

1 is a comparison graph for each vehicle type of sand noise measured with a conventional sound level meter.
2 is a view showing a sand noise measuring apparatus of a vehicle according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating an auditory correction circuit of the sand noise measuring apparatus of the vehicle illustrated in FIG. 2.
4 to 6 is a view showing a process of the sand noise measuring method of a vehicle according to an embodiment of the present invention.
Figure 7 is a comparison graph of the sand noise of the vehicle according to the sand noise measuring method and apparatus of the vehicle according to an embodiment of the present invention.

Hereinafter, a sand noise measuring method and apparatus for a vehicle according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a diagram illustrating an apparatus for measuring sand noise of a vehicle according to an exemplary embodiment of the present invention, and FIG. 3 is a diagram illustrating an auditory correction circuit of the apparatus for measuring sand noise of a vehicle illustrated in FIG. 2.

Sand noise measuring apparatus of a vehicle according to an embodiment of the present invention, the microphone 100 for measuring the noise of the vehicle and converts the sound energy into an electrical energy signal; A filtering unit 320 for extracting a 3000 to 10000 Hz band signal from the electrical energy signal with a band pass filter; And a conversion unit 340 for converting the filtered signal into loudness, which is sound energy.

The amplifier 100 may further include an amplifier 200 for amplifying the electric energy signal output from the microphone 100. The converter 340 may derive the converted loudness as an average value during a measurement time.

As shown, the measuring apparatus of the present invention may be composed of a microphone 100, an amplifier 200, an auditory compensation circuit 300, an amplifier 400, a rectifier 500, and an indicator 600. Here, the microphone 100 measures the noise of the vehicle and converts sound energy into an electrical energy signal, and the amplifier 200 amplifies the electrical energy signal output from the microphone 100.

The hearing correction circuit 300 is again composed of a filtering unit 320 and a conversion unit 340, the filtering unit 320 extracts a signal of the band 3000 ~ 10000 Hz band of the electrical energy signal to the band pass filter, the conversion unit 340 converts the filtered signal into loudness which is negative energy. The conversion unit 340 derives the converted loudness as an average value during the measurement time, and amplifies it again in the amplifier 400 and expresses it numerically in the indicator 600. In the case of sand noise, the frequency band is high, but the energy of sound, that is, the size is very small. Through this band pass, the sound of the frequency corresponding to sand noise is captured and expressed in loudness to compare and extract only the magnitude. In other words, the level of sand noise can be effectively measured.

4 to 6 are views illustrating a process of a method for measuring sand noise of a vehicle according to an embodiment of the present invention. FIG. 4 is a signal measured by a microphone, and FIG. 5 is a signal filtered through a band pass filter. 6 is a graph of converting this to loudness. In the case of loudness, it is a value indicating the energy, ie, the loudness of the sound, and can be evaluated using Zwicker's loudness (unit sone) of ISO 532B. It filters the signal measured by the microphone with a bandpass filter, rectifies it with a lowpass filter and displays it as a constant value by the loudness equation. Then, as shown in FIG. 7, the loudness graph is obtained and integrated into the measurement time, and then divided by the measurement time to obtain the loudness as an average value.

FIG. 7 is a comparison graph of sand noises according to a sand noise measuring method and apparatus of a vehicle according to an exemplary embodiment of the present invention, and the degree of sand noise is clearly distinguished between vehicles when compared with a method of calculating loudness after such band pass filtering. It can be seen that. Therefore, it is possible to know the size of the sand noise using the sand noise measuring apparatus of the present invention, through which it is possible to develop the noise reduction technology of the vehicle.

On the other hand, the measuring method using the sand noise measuring apparatus of the vehicle, the measuring step of changing the noise measured through the microphone into an electrical energy signal; A filtering step of filtering the measured signal with a band pass filter in a 3000 to 10000 Hz band; And a conversion step of converting the filtered signal into loudness which is sound energy.

The measuring step may further include an amplifying step of amplifying the electric energy signal. The converting step may further include a derivation step of deriving the converted loudness values as an average value during the measurement time.

In addition, the deriving step may integrate the loudness values for the measurement time and divide the measurement by the measurement time to derive an average value.

Such a measuring method has been described in the above-described measuring apparatus, so the detailed description will be omitted.

According to the sand noise measurement method and apparatus of the vehicle having the above-described structure, it is possible to quantitatively measure the sand noise noise through an auditory correction circuit designed to measure the sand noise noise level and to compare the objective differences. Become.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

100: microphone 200: amplifier
320: filtering unit 340: conversion unit

Claims (7)

A measuring step of changing the noise measured through the microphone into an electric energy signal;
A filtering step of filtering the measured signal with a band pass filter in a 3000 to 10000 Hz band; And
And converting the filtered signal into loudness, which is sound energy. The method according to claim 1,
The measuring step, Sand noise measurement method of a vehicle further comprising; amplifying step of amplifying the electrical energy signal. The method according to claim 1,
The converting step may further include a derivation step of deriving the converted loudness values as an average value during a measurement time. The method according to claim 3,
The derivation step is a method of measuring the sand noise of the vehicle, characterized in that by integrating the loudness values for the measurement time and by dividing it by the measurement time. A microphone 100 measuring noise of the vehicle and converting sound energy into an electric energy signal;
A filtering unit 320 for extracting a 3000 to 10000 Hz band signal from the electrical energy signal with a band pass filter; And
And a converting unit (340) for converting the filtered signal into loudness which is sound energy. The method according to claim 5,
Sand noise measuring apparatus of the vehicle further comprises; amplification unit (200) for amplifying the electrical energy signal output from the microphone (100). The method according to claim 5,
The conversion unit 340 is a sand noise measuring apparatus for a vehicle, characterized in that to derive the converted loudness as an average value during the measurement time.
KR1020110121991A 2011-11-22 2011-11-22 Method and apparatus for measuring sandnoise for vehicle KR20130056402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110121991A KR20130056402A (en) 2011-11-22 2011-11-22 Method and apparatus for measuring sandnoise for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110121991A KR20130056402A (en) 2011-11-22 2011-11-22 Method and apparatus for measuring sandnoise for vehicle

Publications (1)

Publication Number Publication Date
KR20130056402A true KR20130056402A (en) 2013-05-30

Family

ID=48664424

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110121991A KR20130056402A (en) 2011-11-22 2011-11-22 Method and apparatus for measuring sandnoise for vehicle

Country Status (1)

Country Link
KR (1) KR20130056402A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104729677A (en) * 2014-12-31 2015-06-24 清华大学 Time domain digit weighting method for non-stable noise signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104729677A (en) * 2014-12-31 2015-06-24 清华大学 Time domain digit weighting method for non-stable noise signals
CN104729677B (en) * 2014-12-31 2017-10-03 清华大学 A kind of time-domain digital weighted method of nonstationary noise signal

Similar Documents

Publication Publication Date Title
EP2495996A3 (en) Method for measuring critical gain on a hearing aid
CN102840907B (en) Rolling bearing vibration signal characteristic extracting and analyzing method under early fault state
CN102970646B (en) Loudspeaker abnormal sound detection circuit device and detection method based on constant current source power amplification
CN104992714A (en) Motor abnormal sound detection method
CN105508276A (en) Method for evaluating noise of main transformer fan of urban transformer substation
EP2518518A3 (en) Method for automatically setting frequency span in a spectrum analyzer
CN107274913A (en) A kind of sound identification method and device
CN102610232B (en) Method for adjusting self-adaptive audio sensing loudness
KR20070094680A (en) Method for measuring partial discharge occurring under the operation of a generator, introducing an external noise cancellation manner using differential technique
KR20130056402A (en) Method and apparatus for measuring sandnoise for vehicle
JP3922061B2 (en) Sound quality evaluation apparatus and sound quality evaluation method
CN102085094A (en) Method for determining sound intensity peak slopes of originating point and vanishing point of Korotkoff sounds
CN104883645B (en) Method and device for collecting ambient noise by noise reduction earphone
CN110784815B (en) Device and method for testing acoustic performance of product
JP5900296B2 (en) Vibration analysis apparatus, vibration analysis method, and vibration analysis program
CN103961106A (en) Method for measuring thickness of skin flap and detecting receiving coil
CN102208190B (en) Measurement method and device for inhibiting unstable noise equipment convergence time
RU87798U1 (en) DEVICE FOR VIBRATION DIAGNOSTICS OF INTER-ROTOR BEARINGS
CN111198348B (en) Calibration method for noise test system of magnetic sensor
CN107548007B (en) Detection method and device of audio signal acquisition equipment
JP2012177653A (en) Acoustic diagnosis method, program, and device
JP4951296B2 (en) Water leakage determination device, water leakage determination method
TWI520131B (en) Speech Recognition System Based on Joint Time - Frequency Domain and Its Method
CN107063542B (en) A kind of automobile meter pointer pressing pressure maximum value detection method
JP2020127704A (en) Biological information detector

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application