分段濾波用于消除脈搏血氧檢測(cè)中多種運(yùn)動(dòng)干擾的研究_圖文

1、 2996光譜學(xué)與光譜分析第29卷移動(dòng)均值濾波,移動(dòng)均值濾波的計(jì)算如下,(i,歹=Se彰(i=MedSeg(一(i。,Seg(j(i,Seg(m(i(3其中i=1,2,N,J=(秤十1,(M一行。另外當(dāng)J=l,2,n或J一(M一行+1,M時(shí),(i,J=Seg"(i=Se97j(i。2推+1為均值濾波窗口寬度,Mean為均值操作,將少矩陣重新按列拉直就可以重構(gòu)脈搏波S。=,(1,1,(2,1,(N,1,(1,2,P(N,加(42結(jié)果與討論2.1多種運(yùn)動(dòng)干擾的抵消為了驗(yàn)證該算法對(duì)多種運(yùn)動(dòng)偽差的抵消效果,本文采用自行開(kāi)發(fā)的脈搏波信號(hào)采集板,在手指反射式測(cè)量條件下,人為地讓手指產(chǎn)生突發(fā)抖動(dòng)、

2、周期性抖動(dòng)、以及手指轉(zhuǎn)動(dòng)三種運(yùn)動(dòng),經(jīng)過(guò)該算法處理前后的脈搏波信號(hào)如圖2所示。圖2中箭頭所指代表指尖的運(yùn)動(dòng)方向,圖2表明該算法對(duì)多種擾動(dòng)均有較好的抗噪效果。2.2脈搏波調(diào)制比R的穩(wěn)定性研究為了探討算法對(duì)人體血氧測(cè)量結(jié)果的影響,對(duì)處理前后所計(jì)算出的血氧飽和度值與標(biāo)準(zhǔn)值進(jìn)行比較。由于血氧值的計(jì)算依賴(lài)于具體的校準(zhǔn)曲線,因此本文重點(diǎn)對(duì)與血氧變化直接相關(guān)的交直流調(diào)制比R進(jìn)行討論25,26。人體血氧在一段時(shí)間內(nèi)的變化近似恒定,因此R值的變化也應(yīng)趨于穩(wěn)定。本文利用算法對(duì)3段不同運(yùn)動(dòng)狀態(tài)下的脈搏波信號(hào)進(jìn)行處理,并將處理前后所計(jì)算得到的局部脈搏波所對(duì)應(yīng)的R值作圖示于圖3。o毒12笛1.00_80

3、.60.4O10203040Index oflocal PPG啦3Curve of the R valne witl-the corruptedsi掣叫and the processed si掣laI其中縱坐標(biāo)為局部脈搏波的R值,橫坐標(biāo)為局部脈搏波的序號(hào)。從圖3可以看出,經(jīng)過(guò)算法處理后,數(shù)據(jù)R的穩(wěn)定性得到了改善。特別是運(yùn)動(dòng)所造成的R值波動(dòng)得到了抑制。因此本文所用的算法對(duì)運(yùn)動(dòng)偽差的消除具有較好的效果,且計(jì)算快速,有一定實(shí)用價(jià)值。3結(jié)論本文主要使用了微分閾值分段加一級(jí)中值濾波和一級(jí)移動(dòng)均值平均濾波的方法來(lái)消除運(yùn)動(dòng)偽差的干擾,實(shí)驗(yàn)結(jié)果證實(shí)了該方法具有較好的運(yùn)動(dòng)噪聲抵消效果。方法的計(jì)算量小,實(shí)現(xiàn)簡(jiǎn)單,

4、能夠從一定程度上消除多種復(fù)雜的運(yùn)動(dòng)所帶來(lái)的干擾,因此具有較好的應(yīng)用前景。參考文獻(xiàn)HUANG Jian-xin,LIU Huai(黃建新.劉懷.Journal Of Nanjing Normal University(南京師范大學(xué)學(xué)報(bào).2006,6(1:17.Yitzhak Mendelson.Burt D Oehs.IEEE TransactionsonBiomedieal Engineering,1988,35(10:798.DAI Li-juan,WANGHuirk目tn,QIAN Zhiyu,et a1(戴麗娟.王惠南,錢(qián)志余,等.Spectroscopy and Spectral An

5、alysis(光譜學(xué)與光譜分析.2008.28(7:1469.Rhee S.Yang B.Asada H H.IEEE Transactions onBiomedicalEngineering,48(7:795.Constantine Dumas,Joyce A Wahr,et a1.Anesth Analg,1996,83:269.Gary Comtois,Yitzhak Mendelson.Piyush Rarfluh Proceeding of lEEE/EMBS,Conference,Lyon France,IEEE Press,2007.1528.Yao Jianchu.SteveW

6、arren.Proceedings of the IEEE/EMBS Conference,San Francisco.CA USA,IEEE Press,2004.2153.Graybeal J M,Petterson MT.Proceedings of the IEI強(qiáng)/EMBS Conference,San Francisco,CA USA,IEEE Press,2004.5363.Dia b.US Patent,5482036,1996.Relente A R。Sison LG.Proceeding ofthe Joint IEEE/EMBS Conference,Houstom TX

7、,USA。IEEE Press,2002.1769.Sang HyunKim.Dung WarI。Changseok Bae.Proceedings of IEEE/EMBS Conference,Lyon France2007,2567.Sayedtabaii S.Sayedtabaii L Intemational Journal of Electronics,2007,2(1:31.Levi B Wood。Harry HAsada.Proceeding of lEEE/EMBS Conference,Lyon France,IEEE Press,2007.652.Stetson P F.

8、Proceeding of the IEEE/EMBS Conference,San Francisco,CA,UsA,IEEE Press,2004.231.Byung S Kim。Sun KYoo.臃TransactionsOnBiomedical Engineering,2006,53(3:566.YANG Zhu-qing,LI Yong.HU De-wen(楊竹青,李勇.胡德文.Aeta Automatica Sinica(自動(dòng)化學(xué)報(bào),2002,28(5:762.YaoJianchu,Steve Warren.Proceeding of IEEE-EngineeringinMedic

9、ine and Biology Confereoce,2005.3585.Matthew James Hayes,Peter R&rfitk IEEE TransactiononBiomedicalErlgineering,2001.48(4:452.Johnston W S,Mendelson Y.Proceedings of IEEE/EIVIBS Conference。New York City,USA.IEEE Press.2006.5888.I=I幻叼 分段濾波用于消除脈搏血氧檢測(cè)中多種運(yùn)動(dòng)干擾的研究作者:李慶波, 聶鑫, 張廣軍, 吳瑾光作者單位:李慶波,聶鑫,張廣軍(北京

10、航空航天大學(xué)儀器科學(xué)與光電工程學(xué)院,精密光機(jī)電一體化技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室,北京,100191, 吳瑾光(北京大學(xué)化學(xué)與分子工程學(xué)院,稀土材料化學(xué)及應(yīng)用國(guó)家重點(diǎn)實(shí)驗(yàn)室,北京,100871刊名: 光譜學(xué)與光譜分析英文刊名:SPECTROSCOPY AND SPECTRAL ANALYSIS年,卷(期:2009,29(11參考文獻(xiàn)(26條1.Diab查看詳情 19962.Graybeal J M;Petterson M T查看詳情 20043.Yao Jianchu;Steve Warren查看詳情 20044.Gary Comtois;Yitzhak Mendelson;Piyush Ramuka

11、查看詳情 20075.Constantine Dumas;Joyce A Wahr查看詳情 19966.Rhee S;Yang B;Asada H H查看詳情7.DAI Li-juan;WANG Hui-nan;QIAN Zhi-yu查看詳情 2008(078.Yitzhak Mendelson;Burt D Ochs查看詳情 1988(109.黃建新;劉懷查看詳情 2006(0110.Stetson P F查看詳情 200411.Levi B Wood;Harry H Asada查看詳情 200712.Seyedtabaii S;Seyedtabaii L查看詳情 2007(0113.San

12、g Hyun Kim;Dung Wan;Changseok Bae查看詳情 200714.Relente A R;Sison L G查看詳情 200215.George Zonios;Uday Shahkar;Vijay K Iyer查看詳情 2004(0516.Lee Juwon;Jung Wongeun;Kang Ik Tae查看詳情 200417.王益艷;王晅查看詳情 2008(1118.朱冰蓮;潘哲明;李單單查看詳情 2008(0419.曹治華;宋斌恒查看詳情 2006(0320.Lee Hanwook;Lee Juwon;Jung Wongeun查看詳情 2007(0621.YU Wei;GU Qing-en;YAOXiang查看詳情 20