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1、第42卷第6期中國測試Vol.42No.62016年6月CHINAMEASUREMENT&TESTJune，2016doi院10.11857/j.issn.1674-5124.2016.06.016修正聲強測量系統(tǒng)設(shè)計及實驗驗證陸益民袁紀明祥袁陳品袁李志遠（合肥工業(yè)大學噪聲振動研究所，安徽合肥230009）摘要院傳統(tǒng)的聲強測量系統(tǒng)價格昂貴袁有限差分的存在使得測試頻域受到探頭間距的限制袁寬頻噪聲需分段多次測量遙根據(jù)互譜聲強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測量系統(tǒng)袁包括數(shù)據(jù)采集堯系統(tǒng)聲壓靈敏度標定堯相位失配標定和聲強測量遙針對算法中存在的有限差分誤差進行
2、修正袁在半消聲室中以寬帶白噪聲為聲源袁用開發(fā)的聲強測量系統(tǒng)分析探頭間距為20mm和50mm時探頭軸線和聲源傳播方向夾角分別為0毅堯45毅的修正前后聲強誤差遙結(jié)果表明該聲強測量系統(tǒng)有效袁修正后同一探頭間距測試頻域得到拓展袁聲強準確度得到提升遙關(guān)鍵詞院聲強測量系統(tǒng)；修正聲強；有限差分；誤差分析文獻標志碼院A文章編號院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)袁聲強測量不需要特定的消聲室或半消聲室袁隨聲強具有方向性的優(yōu)勢在現(xiàn)代聲學測量中得到著聲強技術(shù)和測試軟硬件的發(fā)展袁聲強測量已廣泛應(yīng)[1][2][3]收稿日期院2015-12-08曰收到修改稿日期院2016-01-13用于聲功率測試堯噪聲源識別堯聲場特性分析等作者簡介：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)也用聲強技術(shù)解決了大型電器設(shè)備的聲學[4-5]研究方向為噪聲與振動控制遙
