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CN109587618A - A kind of active noise reduction system stability test method and test macro - Google Patents

A kind of active noise reduction system stability test method and test macro Download PDF

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Publication number
CN109587618A
CN109587618A CN201811395521.6A CN201811395521A CN109587618A CN 109587618 A CN109587618 A CN 109587618A CN 201811395521 A CN201811395521 A CN 201811395521A CN 109587618 A CN109587618 A CN 109587618A
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China
Prior art keywords
noise reduction
reduction system
module
active noise
signal
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CN201811395521.6A
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Chinese (zh)
Inventor
韩强
陈少江
余文杰
郑四发
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Hua Yan Hui Sheng (suzhou) Electronic Technology Co Ltd
Suzhou Automotive Research Institute of Tsinghua University
Original Assignee
Hua Yan Hui Sheng (suzhou) Electronic Technology Co Ltd
Suzhou Automotive Research Institute of Tsinghua University
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Application filed by Hua Yan Hui Sheng (suzhou) Electronic Technology Co Ltd, Suzhou Automotive Research Institute of Tsinghua University filed Critical Hua Yan Hui Sheng (suzhou) Electronic Technology Co Ltd
Priority to CN201811395521.6A priority Critical patent/CN109587618A/en
Publication of CN109587618A publication Critical patent/CN109587618A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00Monitoring arrangements; Testing arrangements
    • H04R29/001Monitoring arrangements; Testing arrangements for loudspeakers

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

本发明公开了一种主动降噪系统稳定性测试方法及测试系统,测试方法包括如下步骤:获得所述主动降噪系统的噪声源,所述主动降噪系统根据所述噪声源输出降噪信号;采集测试位置处经所述主动降噪系统控制后的噪声信号,并对噪声信号进行分析;判断前一时刻与后一时刻的声压级相差是否超过设定值;若判断为是,重置所述主动降噪系统,使所述主动降噪系统输出下一时刻的降噪信号;若判断为否,所述主动降噪系统继续输出当前时刻降噪信号。通过该主动降噪系统稳定性测试方法可检测各种工况下该主动降噪系统是否稳定,并根据反馈的结果来判断该主动降噪系统出现不稳定的工况,从而提高该主动降噪系统的工作范围以及工作可靠性。

The invention discloses a stability testing method and a testing system for an active noise reduction system. The testing method includes the following steps: obtaining a noise source of the active noise reduction system, and the active noise reduction system outputs a noise reduction signal according to the noise source. ; Collect the noise signal controlled by the active noise reduction system at the test position, and analyze the noise signal; determine whether the sound pressure level difference between the previous moment and the next moment exceeds the set value; The active noise reduction system is set, so that the active noise reduction system outputs the noise reduction signal at the next moment; if the determination is no, the active noise reduction system continues to output the noise reduction signal at the current moment. Through the active noise reduction system stability test method, it is possible to detect whether the active noise reduction system is stable under various working conditions, and to judge the unstable working conditions of the active noise reduction system according to the feedback results, so as to improve the active noise reduction. The operating range and reliability of the system.

Description

A kind of active noise reduction system stability test method and test macro
Technical field
The present invention relates to automobile active noise controlling computing technique fields, and in particular to a kind of active noise reduction system stability Test method and test macro.
Background technique
It is growing day by day with car ownership, automobile have become modern society's city noise pollution main source it One.In recent years, the rapid development of Domestic Automotive Industry and a large amount of of high-grade highway build, and make the average overall travel speed of automobile not It is disconnected to improve, cause automobile noise higher and higher, and internal car noise is for the riding comfort of automobile and the shadow of users satisfaction degree It rings, also therefore is gradually concerned by people.Related experiment shows that internal car noise is easy to generate driver and passenger tightly , mood is irritated, the psychoreactions such as tired, absent minded, reduce the riding comfort of automobile, the healthy generation to people Chronic hazard, and security risk is brought to the traveling of automobile.Therefore requirement of the user vehicle to automotive quality is also higher and higher, it is right The control of automobile noise has larger impact for the user experience of automobile.
Correlative study shows that the low-frequency noise in motor vehicle is maximum to the health effect of people, and low frequency is made an uproar in motor vehicles room Sound is mainly as caused by the low-frequency cycle noise of engine generation.In the prior art, mostly use " passive control " method to its into Row control, the big multipotency of the measure taken effectively control interior medium, high frequency noise, but to low-frequency noise control effect It is substantially all unobvious.Since noise impedance technology is as a kind of side that can efficiently control low-frequency noise in car room Method has been increasingly becoming the development trend of the automobile noise control.Therefore, it is necessary to the stability of noise impedance technological system Carry out correlative study and reliability demonstration.
Summary of the invention
The purpose of the present invention is being directed to the problems of the prior art, a kind of active noise reduction system stability test side is provided Method.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of active noise reduction system stability test method, it is characterised in that: the test method includes the following steps:
The noise source of the active noise reduction system is obtained, the active noise reduction system exports de-noising signal according to the noise source;
Noise signal at collecting test position after active noise reduction system control, and noise signal is analyzed;
Whether judge that previous moment is differed with the sound pressure level of later moment in time is more than setting value;
If being judged as YES, the active noise reduction system is reset, makes the de-noising signal of the active noise reduction system output subsequent time;
If being judged as NO, the active noise reduction system continues to output current time de-noising signal.
Preferably, interior noise signal under various operating conditions is acquired, and noise signal under various operating conditions is integrally formed The noise source.
Preferably, the output de-noising signal of the active noise reduction system obtains loudspeaker pumping signal through power amplification, leads to Cross loudspeaker output.
The present invention also provides a kind of active noise reduction system system for testing stability, including electrical with the active noise reduction system The Detection of Stability system of connection.
Preferably, the active noise reduction system includes:
Noise information obtains module, for obtaining interior noise signal under various operating conditions;
Signal constructing module is controlled, module is obtained with the noise information and is electrically connected, for the noise information to be obtained mould The noise signal that block obtains is integrated, and noise source is obtained;
First controller module is electrically connected with the control signal constructing module, whole according to the control signal constructing module Noise source after conjunction exports de-noising signal;
Loudspeaker module, the loudspeaker module and first controller module are electrically connected, first controller module It exports de-noising signal and obtains loudspeaker pumping signal through power amplification, exported by the loudspeaker module;
The Detection of Stability system includes:
Noise data obtains module, for the noise signal at collecting test position after active noise reduction system control;
Data real time analysis module obtains module with the noise data and is electrically connected, for obtaining mould to the noise data The data of block acquisition carry out processing analysis;
Information feedback module is analyzed, is electrically connected with the data real time analysis module, according to the data real time analysis module Treated that data judges whether previous moment is differed with the sound pressure level of later moment in time more than setting value for analysis;
Second controller module is electrically connected with the analysis information feedback module and first controller module, root respectively The movement of first controller module is controlled according to the information of the analysis information feedback module feedback.
Further, the Detection of Stability module further includes first information logging modle, and the first information records mould Block and the analysis information feedback module are electrically connected, when the analysis information feedback module feeds back previous moment and later moment in time Sound pressure level when differing by more than setting value, when the time of the first information logging modle record operating condition operation and mutation It carves, and the number that programming count mutates.
Further, the Detection of Stability module further includes the second information logging modle, when the analysis information is fed back Module feedback previous moment is differed with the sound pressure level of later moment in time when being less than setting value, the second information logging modle record Live signal.
Preferably, the test macro further includes the anechoic room of closing setting, the first wheat being placed in the anechoic room Gram wind and second microphone, the first loudspeaker being arranged on the wall of the anechoic room and the second loudspeaker are arranged described There is the seat of headrest, first loudspeaker issues noise signal as noise source, and second loudspeaker is used in anechoic room In the active noise reduction system, de-noising signal is issued, first microphone is arranged at the ceiling position of the anechoic room, uses In the active noise reduction system, the second microphone is separately positioned on the left and right sides of the headrest, is used for the stability Detection system acquires the noise signal after noise reduction at the headrest positions.
Further, on the seat of the people in the anechoic room when sitting, in front of the face orientation of people, described first Loudspeaker is arranged on the wall before the anechoic room and extend into the anechoic room, and second loudspeaker has two It is a, on the wall for the left and right sides that two second loudspeakers are individually positioned in the anechoic room and it extend into the anechoic room In.
Further, the anechoic room includes front, rear, left and right four sides wall and roof, the four sides wall and the room The material on top is identical.
Due to the application of the above technical scheme, compared with the prior art, the invention has the following advantages: active of the invention Whether noise reduction system stability test method can detect the active noise reduction system under various operating conditions stable, and according to the result of feedback Judge that unstable operating condition occurs in the active noise reduction system, to improve the working range and work of the active noise reduction system Reliability.
Detailed description of the invention
Attached drawing 1 is the composition figure of active noise reduction system of the invention;
Attached drawing 2 is the composition figure of the first controller module of the invention;
Attached drawing 3 is the composition figure of Detection of Stability system of the invention;
Attached drawing 4 is the main view (outside) of experimental rig of the invention;
Attached drawing 5 is the main view (perspective) of experimental rig of the invention;
Attached drawing 6 is active noise reduction system stability test flow chart of the invention.
Specific embodiment
The technical solution of the present invention will be further described below with reference to the accompanying drawings.
As shown in Figure 1, active noise reduction system of the invention includes that noise information obtains modules A 01, control signal construction mould Block A02, the first controller module A03 and loudspeaker module A04.Noise information obtains modules A 01 for obtaining under various operating conditions Internal car noise signal;It controls signal constructing module A02 and noise information obtains modules A 01 and is electrically connected, be used for noise information It obtains the noise signal that modules A 01 obtains to be integrated, obtains noise source;First controller module A03 and control signal construction Modules A 02 is electrically connected, and exports de-noising signal according to the noise source after control signal constructing module A02 integration;Loudspeaker module A04 and the first controller module A03 is electrically connected, and the first controller module A03 output signal obtains loudspeaker through power amplification Pumping signal is exported by loudspeaker module A04.
First controller module A03 include noise reduction mode input module C01, the first controlled load case determining module C02 and Control order module C03 is chosen, as shown in Figure 2.
Active noise reduction system system for testing stability of the invention includes Detection of Stability system, Detection of Stability system with Active noise reduction system is electrically connected.As shown in figure 3, Detection of Stability system includes that obtain module K01, data real-time for noise data Analysis module K02, analysis information feedback module K03 and second controller module K04, noise data obtain module K01 and are used for Noise signal at collecting test position after active noise reduction system controls;Data real time analysis module K02 is obtained with noise data Modulus block K01 is electrically connected, and the data for obtaining module K01 acquisition to noise data carry out processing analysis;It is anti-to analyze information It presents module K03 and data real time analysis module K02 to be electrically connected, according to data real time analysis module K02 analysis treated number It is judged that whether it is more than setting value that previous moment is differed with the sound pressure level of later moment in time;Second controller module K04 is analyzed respectively Information feedback module K03 and the first controller module A03 is electrically connected, for what is issued according to information feedback module K03 feedback Information output order gives the first controller module A03, controls the movement of the first controller module A03, when analysis information feeds back mould When the sound pressure level of block K03 feedback previous moment and later moment in time differs by more than setting value, second controller module K04 sends instruction To the first controller module A03, when analysis information feedback module K03 feedback previous moment differs not with the sound pressure level of later moment in time When more than setting value, second controller module K04 does not send instructions to the first controller module A03.
Detection of Stability system further includes first information logging modle K05, first information logging modle K05 and analysis information Feedback module K03 is electrically connected, when analysis information feedback module K03 feedback previous moment differs super with the sound pressure level of later moment in time When crossing setting value, first information logging modle K05 records the time of operating condition operation and mutates the moment, and programming count is sent out The number of raw mutation.
Detection of Stability system further includes the second information logging modle K06, the second information logging modle K06 and analysis information Feedback module K03 is electrically connected, when analysis information feedback module K03 feedback previous moment differs not with the sound pressure level of later moment in time When more than setting value, first information logging modle K06 records live signal.
The active noise reduction system system for testing stability further includes the experimental rig for carrying out Detection of Stability, such as Fig. 4 and Fig. 5 It is shown, experimental rig include closing setting anechoic room 1, the first microphone 2 for being placed in anechoic room 1 and second microphone 3, The seat with headrest is arranged in anechoic room 1 in the first loudspeaker 4 and the second loudspeaker 5 that are arranged on the wall of anechoic room 1 6。
Anechoic room 1 includes front, rear, left and right four sides wall and roof, and four sides wall is identical with the material on roof.People is in place On seat 6 in anechoic room 1 when sitting, in front of the face orientation of people, the left and right sides of the body of people is respectively anechoic room 1 Left and right wall.
First loudspeaker 4 is arranged on the wall before anechoic room 1, and extend into anechoic room 1 from the wall of front, First loudspeaker 4 is used as noise source, issues noise signal.Second loudspeaker 5 is used for active noise reduction system, passes through the first controller Modules A 03 controls sounding, which is used for noise reduction;There are two second loudspeakers 5, and two the second loudspeakers 5 are individually positioned in and disappear On the wall of the left and right sides of sound chamber 1, and it is extend into anechoic room 1 from the wall of the left and right sides respectively.In the present embodiment, first Loudspeaker 4 and the second loudspeaker 5 are all made of 5 cun of passive sound.
First microphone 2 is arranged at the ceiling position of anechoic room 1, is used for active noise reduction system.Second microphone 3 is distinguished It is arranged in the left and right sides of the headrest of the seat 6 in anechoic room 1, Detection of Stability system is used for, to acquire noise reduction back The noise signal at position is rested the head on, provides real-time noise information for Detection of Stability system.
Fig. 6 shows the flow diagram that active noise reduction system of the invention carries out stability test, mainly includes such as Lower process step:
(1) modules A 01 is obtained by noise information and acquires the internal car noise signal under various operating conditions, dropped using this signal as active The input noise signal for system of making an uproar.
Measurement condition includes the static state and dynamic operation condition after vehicle motor starting, and static operating condition includes at least IS Idle Switch Air-conditioning, fixation, original place POT;Dynamic operation condition includes at least at the uniform velocity 40-100km/h, slow acceleration POT, anxious acceleration WOT, Tip in/ out.Each operating condition at least tests three groups of data, and every group is at least tested 10s, and ambient noise will be lower than institute's measurement condition when test Noise at least 10dB(A).
When obtaining noise signal interior under each operating condition, measuring point is selected in the left and right sides of driver's headrest, by two The noise signal of point position is compared, it is ensured that the accuracy and availability of test data.
(2) integration processing is carried out to step (1) test data obtained in control signal constructing module A02, obtained The noise source of active noise reduction system.When test, which is output in anechoic room 1 by the first loudspeaker 4.
The signal after signal constructing module A02 is integrated will be controlled and obtain loudspeaker pumping signal after power amplification, Using the loudspeaker signal as the noise source of active noise reduction system.
When signal will guarantee to switch between a upper operating condition and next operating condition in integrating treatment process, two kinds of sound letters Number it is continuous.After pending data arranges, it is converted into the identifiable file format of active noise reduction system.
(3) first controller module A03 controlled according to noise source after export de-noising signal to loudspeaker module A04。
Order control module C03 in first controller module A03 may be selected to reduce certain in 2 ranks, 4 ranks, 6 ranks of signal One order noise or multiple order noises, posttectonic signal, which exports, gives loudspeaker module A04.
(4) output signal of step (3) obtains loudspeaker pumping signal after power amplification, controls loudspeaker module A04 output signal noise reduction, de-noising signal herein pass through two the second loudspeakers 5 respectively and enter in anechoic room 1.
(5) module K01 is obtained by noise data to acquire in real time at left and right sides position of resting the head in anechoic room 1 after control Noise signal, noise signal herein are obtained by two second microphones 3.
(6) noise signal obtained in data real time analysis module K02 to step (5) is analyzed and processed.
Real-time Fourier data transformation is carried out in data real time analysis module K02, to real-time Fourier transformation point Analysis data are analyzed.
(7) judge in analysis information feedback module K03 previous moment differ with the sound pressure level of later moment in time whether be more than Setting value.
Real-time difference when peak-peak noise reduction within 20-500Hz is detected, calculation formula is as shown in following formula 1;
Fa=Ft2- Ft1 (1)
In formula: Fa indicates the real-time difference of noise reduction effect, the noise after Ft1 expression previous moment Fourier transformation at peak-peak It is worth, the noise figure after later moment in time Fourier transformation of the Ft2 expression after Ft1 at peak-peak.In the present embodiment, previous moment For preceding 0.05s, later moment in time is rear 0.05s.
If the difference at this is greater than the set value, in the present embodiment, setting value is 2dB (A), analyzes information feedback module K03 exports feedback information and gives second controller module K04, while the time of first information logging modle K05 record operating condition operation And it mutates the moment, and the number that programming count mutates.
If the difference at this is not more than setting value, illustrate that active noise reduction system plays Noise Reduction, analysis information feedback Feedback signal, the second information logging modle K06 do not record real time information to module K03, and the first controller module A03, which is continued to output, to be worked as Preceding moment noise signal carries out noise reduction process.
(8) information that second controller module K04 is fed back according to information feedback module K03, output relevant control actively drop The instruction for system of making an uproar, the instruction are directly inputted in the first controller module A03, when making current in the first controller module A03 The control parameter at quarter is reset, the first controller module even if active noise reduction system restarts work, in active noise reduction system A03 exports de-noising signal according to the noise signal of subsequent time, repeats step (4) ~ (8).
So circulation carries out repeatedly, and circulation all includes all operating conditions every time, after circulation terminates, automatically begins to every time next Circulation, exports examining report after circulation terminates to all automatically, more to going wrong to analyze the stability of the system Operating condition carry out careful analysis, while for active noise reduction algorithm engineer provide relevant optimization direction and optimize operating condition.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar can understand the contents of the present invention and be implemented, and it is not intended to limit the scope of the present invention, it is all according to the present invention Equivalent change or modification made by Spirit Essence, should be covered by the scope of protection of the present invention.

Claims (10)

1. a kind of active noise reduction system stability test method, it is characterised in that: the test method includes the following steps:
The noise source of the active noise reduction system is obtained, the active noise reduction system exports de-noising signal according to the noise source;
Noise signal at collecting test position after active noise reduction system control, and noise signal is analyzed;
Whether judge that previous moment is differed with the sound pressure level of later moment in time is more than setting value;
If being judged as YES, the active noise reduction system is reset, makes the de-noising signal of the active noise reduction system output subsequent time;
If being judged as NO, the active noise reduction system continues to output current time de-noising signal.
2. active noise reduction system stability test method according to claim 1, it is characterised in that: acquire under various operating conditions Internal car noise signal, and noise signal under various operating conditions is carried out being integrally formed the noise source.
3. active noise reduction system stability test method according to claim 1, it is characterised in that: the active noise reduction system The output de-noising signal of system obtains loudspeaker pumping signal through power amplification, is exported by loudspeaker.
4. a kind of active noise reduction system system for testing stability, it is characterised in that: including electrically connecting with the active noise reduction system The Detection of Stability system connect.
5. active noise reduction system system for testing stability according to claim 4, it is characterised in that: the active noise reduction system System includes:
Noise information obtains module, for obtaining interior noise signal under various operating conditions;
Signal constructing module is controlled, module is obtained with the noise information and is electrically connected, for the noise information to be obtained mould The noise signal that block obtains is integrated, and noise source is obtained;
First controller module is electrically connected with the control signal constructing module, whole according to the control signal constructing module Noise source after conjunction exports de-noising signal;
Loudspeaker module, the loudspeaker module and first controller module are electrically connected, first controller module It exports de-noising signal and obtains loudspeaker pumping signal through power amplification, exported by the loudspeaker module;
The Detection of Stability system includes:
Noise data obtains module, for the noise signal at collecting test position after active noise reduction system control;
Data real time analysis module obtains module with the noise data and is electrically connected, for obtaining mould to the noise data The data of block acquisition carry out processing analysis;
Information feedback module is analyzed, is electrically connected with the data real time analysis module, according to the data real time analysis module Treated that data judges whether previous moment is differed with the sound pressure level of later moment in time more than setting value for analysis;
Second controller module is electrically connected with the analysis information feedback module and first controller module, root respectively The movement of first controller module is controlled according to the information of the analysis information feedback module feedback.
6. active noise reduction system system for testing stability according to claim 5, it is characterised in that: the Detection of Stability Module further includes first information logging modle, and the first information logging modle electrically connects with the analysis information feedback module It connects, it is described when the sound pressure level of the analysis information feedback module feedback previous moment and later moment in time differs by more than setting value First information logging modle records the time of operating condition operation and mutates the moment, and the number that programming count mutates.
7. active noise reduction system system for testing stability according to claim 5, it is characterised in that: the Detection of Stability Module further includes the second information logging modle, when the acoustic pressure of analysis information feedback module the feedback previous moment and later moment in time When grade difference is less than setting value, second information logging modle records live signal.
8. active noise reduction system system for testing stability according to claim 4, it is characterised in that: the test macro is also Anechoic room, the first microphone being placed in the anechoic room and second microphone, setting including closing setting disappear described The first loudspeaker and the second loudspeaker on the wall of sound chamber are arranged in the anechoic room seat with headrest, and described the One loudspeaker issues noise signal as noise source, and second loudspeaker is used for the active noise reduction system, issues noise reduction letter Number, first microphone is arranged at the ceiling position of the anechoic room, is used for the active noise reduction system, second wheat Gram wind is separately positioned on the left and right sides of the headrest, is used for the Detection of Stability system, acquires the headrest position after noise reduction Set the noise signal at place.
9. active noise reduction system system for testing stability according to claim 8, it is characterised in that: people is in the anechoic room In the seat on sitting when, in front of the face orientation of people, first loudspeaker is arranged in front of the anechoic room It on wall and extend into the anechoic room, there are two second loudspeakers, and two second loudspeakers are individually positioned in On the wall of the left and right sides of the anechoic room and it extend into the anechoic room.
10. active noise reduction system system for testing stability according to claim 8, it is characterised in that: the anechoic room packet Front, rear, left and right four sides wall and roof are included, the four sides wall is identical with the material on the roof.
CN201811395521.6A 2018-11-22 2018-11-22 A kind of active noise reduction system stability test method and test macro Pending CN109587618A (en)

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CN111307276A (en) * 2020-03-18 2020-06-19 吉林大学 A closed space active noise reduction electric experimental device
CN111723415A (en) * 2020-06-15 2020-09-29 中科上声(苏州)电子有限公司 Performance evaluation method and device of vehicle noise reduction system
CN111938504A (en) * 2019-09-19 2020-11-17 北京安声浩朗科技有限公司 Space active noise reduction method, device and system and dust collector
CN113207065A (en) * 2021-05-10 2021-08-03 杭州兆华电子有限公司 Acoustic calibrator and method based on ANC feedforward topology
CN113390655A (en) * 2021-06-09 2021-09-14 中车株洲电力机车有限公司 Active noise reduction effect evaluation method suitable for urban rail vehicle
CN114382320A (en) * 2022-03-24 2022-04-22 山东省高速养护集团有限公司 Highway noise reduction construction device and construction method
CN114822478A (en) * 2022-03-11 2022-07-29 中国第一汽车股份有限公司 Automobile with active noise reduction system for road noise in automobile and vibration signal acquisition device and system development method
US11804236B2 (en) 2020-12-15 2023-10-31 Apollo Intelligent Connectivity (Beijing) Technology Co., Ltd. Method for debugging noise elimination algorithm, apparatus and electronic device

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