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1、第42卷第6期中國測(cè)試Vol.42No.62016年6月CHINAMEASUREMENT&TESTJune,2016doi院10.11857/j.issn.1674-5124.2016.06.016修正聲強(qiáng)測(cè)量系統(tǒng)設(shè)計(jì)及實(shí)驗(yàn)驗(yàn)證陸益民袁紀(jì)明祥袁陳品袁李志遠(yuǎn)(合肥工業(yè)大學(xué)噪聲振動(dòng)研究所,安徽合肥230009)摘要院傳統(tǒng)的聲強(qiáng)測(cè)量系統(tǒng)價(jià)格昂貴袁有限差分的存在使得測(cè)試頻域受到探頭間距的限制袁寬頻噪聲需分段多次測(cè)量遙根據(jù)互譜聲強(qiáng)算法袁利用采集卡堯傳聲器和虛擬儀器技術(shù)開發(fā)出一套便捷堯高效堯低成本的聲強(qiáng)測(cè)量系統(tǒng)袁包括數(shù)據(jù)采集堯系統(tǒng)聲壓靈敏度標(biāo)定堯相位失配標(biāo)定和聲強(qiáng)測(cè)量遙針對(duì)算法中存在的有限差分誤差進(jìn)行
2、修正袁在半消聲室中以寬帶白噪聲為聲源袁用開發(fā)的聲強(qiáng)測(cè)量系統(tǒng)分析探頭間距為20mm和50mm時(shí)探頭軸線和聲源傳播方向夾角分別為0毅堯45毅的修正前后聲強(qiáng)誤差遙結(jié)果表明該聲強(qiáng)測(cè)量系統(tǒng)有效袁修正后同一探頭間距測(cè)試頻域得到拓展袁聲強(qiáng)準(zhǔn)確度得到提升遙關(guān)鍵詞院聲強(qiáng)測(cè)量系統(tǒng);修正聲強(qiáng);有限差分;誤差分析文獻(xiàn)標(biāo)志碼院A文章編號(hào)院1674-5124淵2016冤06-0070-04DesignandexperimentalverificationofcorrectedsoundintensitymeasurementsystemLUYimin,JIMingxiang,CHENPin,LIZhiyuan(Ins
3、tituteofSound&VibrationResearch,HefeiUniversityofTechnology,Hefei230009,China)Abstract:Asthetraditionalsoundintensitymeasurementsystemisexpensiveandthefinitedifferencemakesthetestfrequencydomainbelimitedbyprobeintervalandbroadbandnoisebemeasuredbysectionsinseveraltests,asetofconvenient,efficientan
4、dlow-costsoundintensitymeasurementsystemcoveringdataacquisition,systemsoundpressuresensitivitycalibration,phasemismatchcalibrationandsoundintensitymeasurementwasdevelopedbyusingcapturecard,microphoneandvirtualinstrumenttechnologyaccordingtocrossspectrumsoundintensityalgorithm.Itcorrectstheerroroff
5、initedifferenceinthealgorithmandanalyzestheerrorofsoundintensityafterandbeforecorrectionwhentheincludedangleinprobeaxisdirectionandsoundsourcetransmissiondirectionis0毅and45毅respectively(whentheprobeintervalis20mmand50mm)withthedevelopedsoundintensitymeasurementsystembytakingthewidebandwhitenoisein
6、semi-anechoicroomasthesoundsource.Resultsshowthatthesoundintensitymeasurementsystemiseffectiveandafterthecorrection,thetestfrequencydomainatonesameprobeinternalisexpandedandthesoundintensityaccuracyisimproved.Keywords:soundintensitymeasurementsystem;correctedsoundintensity;finitedifference;erroran
7、alysis0引言體現(xiàn)袁聲強(qiáng)測(cè)量不需要特定的消聲室或半消聲室袁隨聲強(qiáng)具有方向性的優(yōu)勢(shì)在現(xiàn)代聲學(xué)測(cè)量中得到著聲強(qiáng)技術(shù)和測(cè)試軟硬件的發(fā)展袁聲強(qiáng)測(cè)量已廣泛應(yīng)[1][2][3]收稿日期院2015-12-08曰收到修改稿日期院2016-01-13用于聲功率測(cè)試堯噪聲源識(shí)別堯聲場(chǎng)特性分析等作者簡(jiǎn)介:陸益民淵1972-冤袁男袁安徽合肥市人袁副教授袁博士袁方面袁國內(nèi)也用聲強(qiáng)技術(shù)解決了大型電器設(shè)備的聲學(xué)[4-5]研究方向?yàn)樵肼暸c振動(dòng)控制遙