風速儀,熱球式風速儀的理論建模及分析
來源: http://www.98fo.cn/ 類別:實用技術 更新時間:2012-04-06 閱讀次
【本資訊由中國糧油儀器網提供】
在現代艦船上一般都裝有風速儀,zuoweiqixiangxitongdeyibufen,yongyuceliangjianchuanzaihangxingguochengzhongdefengsufengxiang,weihangxingcaozongtigongxinxi。dangqiansuoshiyongdefengsuyizhongleifanduo,gongzuoyuanlihexingnengyegebuxiangtong,qizhongshiyongjiaoduodeshijixieshifengsuyi,liruchangyongdefengbeishiheluoxuanjiangshifengsuyi。danyouyujixieshifengsuyideceliangbufenshixuanzhuanbujian,zaiqiangfenghechangqibaoluyushiwaidegongzuohuanjingxiarongyimosun,erqiecunzai“過高效應”,造成測量精度不高,使用條件受到製約。近年來,隨著電子技術的發展,出現了許多新的風速風向測量方式,如激光風速儀、超聲波風速儀、gaojichengdudefengsuyidengdeng,zhexiexinxingfengsuyitijijiaoxiao,wujixiebujian,shoumingchang,erqieyoudejingduhengao,zhengzaizhubuqudaichuantongjixieshifengsuyi,yingyongyuelaiyueguangfan。chaoshengbofengsuyishixinxingfengsuyizhongxingnengjiaoweituchudeyizhong,jingdunengdadaobujinjiegoujiandan、堅固耐用,而且能準確測出自然風中陣風脈動的高頻成分。
意大利G.C.Aprilesidengrenshangshijiniandaizhizuolereqiushifengsuyideyuanliyangji,yanzhenglechaoshengbofengsuyidekexingxing,danqicaiyongdeshisanduishoufafenzhitantouhexinpian,yongmonifangshichulichaoshengboxinhao,juwomenshijiceshi,jingduhekekaoxingdoubugao。dengrenyanjiuleyongyuhuoxingdaqifengsufengxiangceliangdechaoshengbochuanganqijishu,bingtichucaiyongmaichongyasuojishupanduanshengbodaodashijian,suodedejielunjiaoyouyiyi。tanghuiqiangdengrentichuleyizhongliyongDSh實現超聲風速測量的方案,采用數字前後向濾波、zhaidailvbodengxinhaochulishouduanpanduanshengbojieshoumaichongdedaodashikedefangfayouyidingdelilunjiazhi,danguoyufuzabuyigongchengshixian。lingwaizhangjianlandengrenzhenduishengnaxitongtichuleyizhongyadiantaocifashehuannengqideshuntaiyizhijishu,suiranduigaishanjieshouxinhaopanduanshengbodaodashikefeichangyouli,danshizengjialefashexitongdefuzaxing。guowaichaoshengbofengsuyiyijingyouchengshuchanpin,rufenlandeVAISALA係列和英國的GILL係(xi)列(lie),都(dou)包(bao)括(kuo)二(er)維(wei)和(he)三(san)維(wei)測(ce)風(feng)向(xiang)的(de)產(chan)品(pin),有(you)的(de)還(hai)能(neng)構(gou)建(jian)無(wu)人(ren)值(zhi)守(shou)氣(qi)象(xiang)站(zhan)。目(mu)前(qian),國(guo)內(nei)還(hai)未(wei)開(kai)發(fa)出(chu)成(cheng)熟(shu)可(ke)靠(kao)的(de)超(chao)聲(sheng)波(bo)風(feng)速(su)儀(yi),我(wo)們(men)研(yan)製(zhi)的(de)原(yuan)理(li)樣(yang)機(ji)正(zheng)在(zai)進(jin)行(xing)測(ce)試(shi)
本(ben)文(wen)首(shou)先(xian)給(gei)出(chu)了(le)超(chao)聲(sheng)波(bo)風(feng)速(su)儀(yi)的(de)基(ji)本(ben)組(zu)成(cheng)及(ji)原(yuan)理(li),然(ran)後(hou)在(zai)此(ci)基(ji)礎(chu)上(shang)深(shen)入(ru)研(yan)究(jiu)了(le)超(chao)聲(sheng)波(bo)在(zai)空(kong)氣(qi)中(zhong)傳(chuan)播(bo)的(de)特(te)性(xing),建(jian)立(li)了(le)超(chao)聲(sheng)波(bo)風(feng)速(su)儀(yi)的(de)理(li)論(lun)模(mo)型(xing),認(ren)為(wei)實(shi)現(xian)超(chao)聲(sheng)波(bo)風(feng)速(su)儀(yi)需(xu)要(yao)同(tong)時(shi)考(kao)慮(lv)風(feng)對(dui)超(chao)聲(sheng)波(bo)傳(chuan)播(bo)時(shi)間(jian)和(he)信(xin)號(hao)強(qiang)度(du)兩(liang)個(ge)特(te)性(xing)的(de)雙(shuang)重(zhong)影(ying)響(xiang),研(yan)製(zhi)了(le)原(yuan)理(li)樣(yang)機(ji),並(bing)進(jin)行(xing)了(le)實(shi)際(ji)測(ce)試(shi),取(qu)得(de)了(le)和(he)理(li)論(lun)模(mo)型(xing)較(jiao)為(wei)一(yi)致(zhi)的(de)結(jie)果(guo),為(wei)下(xia)一(yi)步(bu)工(gong)程(cheng)實(shi)現(xian)提(ti)供(gong)了(le)依(yi)據(ju)。
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