Medium bus interior noise testing method and medium bus interior noise analysis method

A technology of vehicle interior noise and testing methods, which is applied in vehicle testing, machine/structural component testing, measuring devices, etc., can solve the problem of inability to obtain accurate interior noise analysis results, and achieve accurate analysis results and accurate test results. Effect

Pending Publication Date: 2022-07-29
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the prior art cannot obtain accurate interior noise analysis results, the present invention proposes a medium-sized bus interior noise analysis method

Method used

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  • Medium bus interior noise testing method and medium bus interior noise analysis method
  • Medium bus interior noise testing method and medium bus interior noise analysis method
  • Medium bus interior noise testing method and medium bus interior noise analysis method

Examples

Experimental program
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Embodiment 1

[0029] The present embodiment provides a method for testing interior noise of a medium-sized passenger vehicle, comprising the following steps:

[0030] S1. Adjust the seat back, and then arrange the microphone in the car;

[0031] S2. Carry out the vehicle interior noise test on the medium-sized passenger car, and the test conditions include fixed-position conditions, constant-speed driving conditions, and acceleration and deceleration driving conditions;

[0032] S3. Collect the in-vehicle noise signal and the engine speed signal in the fixed working condition when the air-conditioning system is turned off and when the air-conditioning system is turned on, respectively, and collect the in-vehicle noise signal and Engine speed signal.

[0033] It should be noted that the arrangement position of the microphone should first comply with the regulations in GB / T 18697. The vertical height is 0.7m±0.05m based on the seat surface, and the horizontal distance is 102m±0.02m based on ...

Embodiment 2

[0035] This embodiment is a further illustration of Embodiment 1, wherein the microphones in step S1 are arranged by a five-point arrangement method, and the specific arrangement positions of the five-point arrangement method are:

[0036] The first point is the inner ear position of the driver's seat, the second point is the inner ear position of the passenger seat near the window in the first row behind the driver, the third point is the inner ear position of the passenger seat near the window on the left side of the last row of seats, and the fourth point is The inner ear position of the right passenger seat in front of the last row of seats, and the fifth point is the inner ear position of the first row passenger seat behind the passenger compartment door.

[0037] For better understanding, this embodiment takes a 19-seat medium-sized passenger car and a 17-seat medium-sized passenger car as examples, and the five-point method for microphone arrangement of a 19-seat medium-...

Embodiment 3

[0039] This embodiment is a further illustration of Embodiment 1, wherein the measurement parameters and data acquisition settings of the microphone in step S1 are as follows: the noise signal analysis frequency is 20Hz-20kHz; the frequency resolution range is 0.5Hz-2Hz.

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Abstract

The invention discloses a medium bus interior noise testing method and an analysis method, relates to the field of noise testing, and solves the problem that an accurate interior noise analysis result cannot be measured. A microphone is arranged after a seat backrest is adjusted; testing the noise in the vehicle, wherein the noise comprises a fixed driving condition, a constant-speed driving condition and an acceleration and deceleration driving condition; in-vehicle noise signals and engine rotating speed signals under the fixed working conditions when an air conditioning system is turned off and an air conditioner is turned on are collected, and in-vehicle noise signals and engine rotating speed signals under the constant-speed driving working conditions and the acceleration and deceleration driving working conditions when the air conditioning system is turned off are collected. The Z wicker method is used for calculating the weighted sound pressure level and 1 / 3 octave spectrum of each test point A when the air conditioning system is turned on and off under the fixed working condition, calculating the sound pressure level of each test point under the constant-speed driving working condition, and calculating the waterfall plot of the weighted sound pressure level of each test point A along with the change of the engine speed and the curve of the sound pressure level along with the change of the engine speed under the acceleration and deceleration working conditions. The method is applied to development and verification of the medium bus in a whole vehicle factory.

Description

technical field [0001] The invention relates to the field of vehicle noise testing, in particular to the analysis technology of vehicle interior noise. Background technique [0002] Automobile noise is an important indicator in the identification of automobile manufacturing, and it is the most important part of traffic noise. The noise characteristics of modern automobiles are an important indicator to measure the quality of automobiles. In-vehicle noise is one of the main factors affecting vehicle comfort. In order to effectively control road traffic noise, improve vehicle ride comfort, and reduce the hearing damage of drivers and passengers, major automobile companies in the world take the control of in-vehicle noise as a priority. important research directions. [0003] Patent document CN110296847B discloses a noise evaluation method for new energy passenger cars. The sound pressure level curve retrieved from the test data is used as a sound sample and divided into m ind...

Claims

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Application Information

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IPC IPC(8): G01M17/007G01H17/00
CPCG01M17/007G01H17/00
Inventor 李彬邓建交李元宝毕金亮宋福强郭霄明
Owner CHINA FIRST AUTOMOBILE
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