??? 摘 要： 介紹了基于虛擬儀器的在線振動監(jiān)測系統(tǒng)" title="監(jiān)測系統(tǒng)">監(jiān)測系統(tǒng)的基本組成、實(shí)現(xiàn)方法和功能,，采用PXI總線儀器和LabVIEW可視化的虛擬儀器系統(tǒng)開發(fā)平臺,，把傳統(tǒng)儀器的所有功能模塊集成在一臺計(jì)算機(jī)中,，用戶可以通過修改虛擬儀器的軟件改變其功能與規(guī)模。該系統(tǒng)實(shí)現(xiàn)了水電機(jī)組" title="水電機(jī)組">水電機(jī)組振動信號的自動采集,，并能通過計(jì)算機(jī)進(jìn)行振動信號的處理和分析。
??? 關(guān)鍵詞： 虛擬儀器? 水電機(jī)組? 振動監(jiān)測? PXI? LabVIEW
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??? 隨著我國水電事業(yè)的發(fā)展，大型機(jī)組的投產(chǎn),，各種容量的機(jī)組數(shù)量不斷增多。如何保證水電機(jī)組運(yùn)行穩(wěn)定是人們普遍關(guān)心的重要問題,。而現(xiàn)階段我國水電機(jī)組的檢修一般實(shí)行計(jì)劃檢修制度,，不管設(shè)備狀態(tài)如何，到期必修,，由此造成大量的資源浪費(fèi),。這種傳統(tǒng)的預(yù)期維修體制已經(jīng)不能滿足現(xiàn)代化維修、運(yùn)行,、管理的要求,。水電機(jī)組設(shè)備龐大、結(jié)構(gòu)復(fù)雜,、故障的誘因繁多,，雖有一些故障不一定以振動形式表現(xiàn)出來，但統(tǒng)計(jì)資料表明,，水電機(jī)組約有80%的故障或事故在振動信號中有所反映[1],，例如水電機(jī)組下機(jī)架的振動參數(shù)表示轉(zhuǎn)動部分的平衡情況，其振動的極頻分量說明發(fā)電機(jī)電磁振動情況等。因此,，振動監(jiān)測是目前應(yīng)用最為普遍和有效的方法[2],，通過對這些振動信號的分析，充分發(fā)掘其中所包含的故障信息,，對水電機(jī)組的安全生產(chǎn),、決策具有重要的實(shí)際意義[3]。
??? 水電機(jī)組的振動監(jiān)測可由傳統(tǒng)儀器系統(tǒng)構(gòu)成,，如圖1所示,。系統(tǒng)功能是由廠家事先定義且固定不可變更功能的傳統(tǒng)儀器完成。由于傳統(tǒng)儀器的功能缺乏靈活性,，有時盡管資金投入很大,，但仍很難滿足任務(wù)的不斷變化所產(chǎn)生的多樣化的需求。而虛擬儀器技術(shù)改變了這種狀況,，它開創(chuàng)了儀器使用者可以成為儀器設(shè)計(jì)者的新時代,。虛擬儀器就是通過軟件平臺構(gòu)造與真實(shí)儀器物理面板相類似的虛擬面板，硬件不再是系統(tǒng)的主體,，它只是在其中實(shí)現(xiàn)信號的輸入輸出,，而由功能強(qiáng)大的軟件完成信號的采集、分析處理和結(jié)果顯示,，實(shí)現(xiàn)了“軟件就是儀器”的理念,。虛擬儀器用計(jì)算機(jī)軟件代替?zhèn)鹘y(tǒng)儀器的某些硬件功能，用戶可以根據(jù)需要定義儀器的功能,，虛擬儀器性能的改進(jìn)和功能擴(kuò)展也只需進(jìn)行相關(guān)軟件的設(shè)計(jì)更新,，而不需要增添新的儀器。因此,，虛擬儀器技術(shù)具有開發(fā)周期短,、成本低、維護(hù)方便,、靈活,、功能強(qiáng)大、用戶可自行定義等特點(diǎn)[4],。
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1 系統(tǒng)硬件結(jié)構(gòu)
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title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡" title="數(shù)據(jù)采集卡">數(shù)據(jù)采集卡,、PXI-PCI833X計(jì)算機(jī)控制PXI模塊,、MXI-3光纖通信模塊、DFE-530TXI網(wǎng)絡(luò)適配卡等組成,，其硬件結(jié)構(gòu)如圖2所示,。
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1.1? 振動傳感器的選擇及安裝
??? 水電機(jī)組與火電機(jī)組相比，水電機(jī)組的額定轉(zhuǎn)速較低,，尤其是水力因素引起的振動頻率更低,。水電機(jī)組振動信號屬低頻信號。由于振動傳感器現(xiàn)場環(huán)境惡劣,、電磁干擾大,、溫度變化大，且傳感器支架本身長期顫動會增加測量的誤差,，因此需選擇可靠性高,、抗干擾能力強(qiáng),、精度高及性能穩(wěn)定的振動傳感器,。為了避免因振動傳感器安裝造成附加誤差使測量值失真，振動傳感器應(yīng)合理安裝,。本系統(tǒng)在測量軸擺度時,，選擇電渦流傳感器。它利用電渦流效應(yīng)測量位置,，具有非接觸測量,、抗干擾能力強(qiáng)的優(yōu)點(diǎn)。將電渦流傳感器安裝在軸承殼體上,，實(shí)行相對測量,，測點(diǎn)位置可選在上導(dǎo)、下導(dǎo),、水導(dǎo)和推力等處,，并各安裝兩個互為90°的電渦流傳感器。在測量機(jī)架和頂蓋等振動時,，選擇地震式傳感器,。它測量基座所連接物體的絕對振動，具有抗震和高穩(wěn)定性的特點(diǎn),。地震式傳感器可直接固定在機(jī)殼上,，安裝應(yīng)盡量靠近轉(zhuǎn)軸，并盡可能避開母線出線等電磁場較強(qiáng)的位置,，測點(diǎn)可選取在上,、下機(jī)架和推力機(jī)架等處,各安裝兩個地震式傳感器，分別對機(jī)架水平方向和垂直方向的振動進(jìn)行監(jiān)測,。系統(tǒng)中采用光電式接近開關(guān)獲取鍵相信號,，確定整周期采樣的基準(zhǔn)點(diǎn),。此外，為便于分析振動與壓力,、工作水頭和上,、下游水位的關(guān)系，還應(yīng)安裝有功功率,、壓力,、上、下游水位相應(yīng)的傳感器,。
1.2 數(shù)據(jù)采集模塊
??? 在數(shù)據(jù)采集領(lǐng)域中,，有基于多種PC機(jī)總線的PC-DAQ數(shù)據(jù)采集卡，也有基于VXI總線的各種數(shù)據(jù)采集模塊,。但是在GPIB,、PC-DAQ和VXI三種虛擬儀器體系中，GPIB實(shí)質(zhì)上是通過計(jì)算機(jī)對傳統(tǒng)儀器功能的擴(kuò)展與延伸,；PC-DAQ直接利用了標(biāo)準(zhǔn)的工業(yè)計(jì)算機(jī)總線,，沒有儀器所需要的總線性能；而一次構(gòu)建VXI系統(tǒng)需要較大的資金投入,。PXI是1997年NI公司推出的一種全新的開放性和模塊化儀器總線規(guī)范,，它將Compact PCI的集成式觸發(fā)功能與Windows操作系統(tǒng)結(jié)合在一起。在保留PCI總線與Compact PCI模塊結(jié)構(gòu)功能的基礎(chǔ)上,，增加了系統(tǒng)參考時鐘與觸發(fā)器總線等,，加之熟悉的Windows環(huán)境，使得PXI系統(tǒng)更適合構(gòu)建工業(yè)自動化測控系統(tǒng),?；赑XI總線規(guī)范構(gòu)建的系統(tǒng)將PC機(jī)的性價比優(yōu)勢和PCI總線面向儀器領(lǐng)域的擴(kuò)展結(jié)合起來，成為一種新型的虛擬儀器系統(tǒng),。PXI除了具有VXI基本相同的性能外,，還具有開發(fā)周期短、價格低,、易于組建便攜式自動測試系統(tǒng)等特點(diǎn),。
??? 本系統(tǒng)中數(shù)據(jù)采集通過現(xiàn)場傳感器將各個測量點(diǎn)的信號經(jīng)過SCB-68接線端子盒將信號送到信號調(diào)理模塊SCXI-1125（可編程隔離放大器）、SCXI-1141（可編程低通濾波器）,、SCXI-1140（采樣/保持放大器）進(jìn)行信號調(diào)理,；最后將經(jīng)過信號調(diào)理的信號送到數(shù)據(jù)采集卡PXI—6052E（16路單端/8路差分模擬輸入、采樣頻率333ksps,、2路模擬輸出,、8條數(shù)字I/O線、2路24位計(jì)數(shù)/定位器）進(jìn)行數(shù)據(jù)采集,。數(shù)據(jù)采集卡PXI-6052E上的24位計(jì)數(shù)/定時器的抗干擾能力不強(qiáng),，為了彌補(bǔ)這一不足,，可利用LS7084芯片和電阻、電容組成一個濾波電路,，消除由于噪聲和振動等造成的干擾,。
1.3? 計(jì)算機(jī)控制模塊
??? 本系統(tǒng)采用了NI公司的組合式機(jī)箱PXI-1010（8個PXI/Compact PCI和4個SCXI插槽），零槽控制模塊采用PXI-PCI833X,。PXI-PCI833X采用MXI-3技術(shù),。MXI-3技術(shù)是一種PCI總線之間的連接技術(shù)，它采用標(biāo)準(zhǔn)PCI-PCI橋技術(shù)及1.5Gbps高速串口連接,，為PXI控制引入了更加快速方便的擴(kuò)展方式,。MXI-3技術(shù)不僅可以進(jìn)行PXI/Compact PCI機(jī)箱之間的連接，而且可通過主控計(jì)算機(jī)直接控制PXI系統(tǒng),。在本系統(tǒng)中將PXI-6052E數(shù)據(jù)采集卡采集到的數(shù)據(jù)通過PXI-PCI833X模塊和傳輸速率高達(dá)132Mbps的MXI-3光纖通信模塊傳送到現(xiàn)場計(jì)算機(jī),。MXI-3包含了一塊插在現(xiàn)場計(jì)算機(jī)中的PCI MXI-3板卡和插在PXI-1010機(jī)箱控制槽內(nèi)的PXI MXI-3模塊，兩板卡通過光纜相連,，實(shí)現(xiàn)PXI-1010機(jī)箱內(nèi)的各模塊與現(xiàn)場計(jì)算機(jī)的通信,。MXI-3技術(shù)可實(shí)現(xiàn)200m距離內(nèi)信號傳輸，解決了現(xiàn)場計(jì)算機(jī)與數(shù)據(jù)采集模塊之間信號遠(yuǎn)距離傳輸?shù)膯栴}?，F(xiàn)場計(jì)算機(jī)通過DFE-530TXI網(wǎng)絡(luò)適配卡與網(wǎng)絡(luò)遠(yuǎn)程監(jiān)控終端相連,，實(shí)現(xiàn)遠(yuǎn)程監(jiān)測,。
2? 系統(tǒng)軟件結(jié)構(gòu)
??? 本系統(tǒng)選擇NI公司的LabVIEW 6i作為開發(fā)工具,，它采用圖形化編程方案，也稱為G語言,。LabVIEW提供了豐富的函數(shù)及子程序庫,，從基本的數(shù)學(xué)函數(shù)到高級分析庫（包括信號處理、窗函數(shù),、濾波器設(shè)計(jì),、線性代數(shù)、概率論與數(shù)理統(tǒng)計(jì),、曲線擬合,、傅立葉變換、小波分析" title="小波分析">小波分析等）,，通過這些函數(shù)及子程序庫,，可以實(shí)現(xiàn)硬件系統(tǒng)的軟件化，設(shè)計(jì)出符合技術(shù)要求的振動監(jiān)測系統(tǒng),。本振動監(jiān)測系統(tǒng)所用的數(shù)據(jù)采集卡為NI公司的產(chǎn)品,，可以使用LabVIEW提供的大量數(shù)據(jù)采集子程序，無需為數(shù)據(jù)采集卡編制驅(qū)動程序,。另外LabVIEW的附帶網(wǎng)絡(luò)工具套件,，方便了遠(yuǎn)程監(jiān)測的設(shè)計(jì),。
??? LabVIEW開發(fā)環(huán)境由前面板和流程圖兩部分組成。前面板是人機(jī)交互的圖形用戶接口,，集成了多種常用的控制對象（如開關(guān),、按鈕、示波器,、指示器,、定時器等），它相當(dāng)于實(shí)際儀器的操作面板,。設(shè)計(jì)時只需從控件庫中選取所需的控件,，并為它們設(shè)計(jì)合理的屬性（例如尺寸和量程等）和具體放置位置。這些屬性和位置可通過程序方便地調(diào)整,。前面板的合理設(shè)計(jì)有助于振動監(jiān)測系統(tǒng)功能的實(shí)現(xiàn)并方便操作,。因此前面板應(yīng)設(shè)置多段開關(guān)以實(shí)現(xiàn)不同的數(shù)據(jù)處理方法，前面板主要部分是顯示圖形和數(shù)據(jù),，可采用多窗口完成不同信號的同時輸出,，前面板還應(yīng)有控制窗口和開關(guān)，以實(shí)現(xiàn)對振動監(jiān)測系統(tǒng)的操作,。流程圖則是程序的圖形化源代碼,，主要由前面板上控件的圖標(biāo)、函數(shù)圖標(biāo)和連線組成,。設(shè)計(jì)時從函數(shù)庫中選取所需要的函數(shù)圖標(biāo),，并按照數(shù)據(jù)在程序中傳遞的順序把它們和控件圖標(biāo)的位置統(tǒng)一編排好，再用連線工具將圖標(biāo)連起來,。系統(tǒng)軟件采用模塊化設(shè)計(jì),，其系統(tǒng)軟件功能模塊如圖3所示。采用模塊化設(shè)計(jì)有助于軟件的設(shè)計(jì)和日后的改進(jìn)升級[5],。
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2.1 “譜泄漏”現(xiàn)象的消除
??? 在運(yùn)用傅立葉運(yùn)算對采樣信號進(jìn)行變換的過程中,，會引起“譜泄漏”現(xiàn)象。為了消除“譜泄漏”現(xiàn)象,，提高譜分析精度,，在傅立葉變換時實(shí)現(xiàn)整周期截?cái)啵瑢φ駝有盘枌?shí)行整周期采樣,。整周期采樣是指系統(tǒng)的采樣頻率動態(tài)地跟蹤信號頻率的變化,，以確保在采樣點(diǎn)數(shù)不變的情況下，采樣周期均勻,，所采信號周期完整,。實(shí)現(xiàn)整周期采樣的關(guān)鍵是如何將一個完整的周期信號均勻地分成K等分進(jìn)行采樣，其中K為一個采樣周期內(nèi)的采樣點(diǎn)數(shù),。信號周期可以通過鍵相信號測得,，兩相鄰鍵相信號的上升沿或下降沿之間即為一個采樣周期,。本系統(tǒng)中通過軟件計(jì)算出采樣時間間隔來達(dá)到均勻采樣的目的。此外加窗也是減小“譜泄漏”影響的一種有效辦法,，對某一個信號選擇一個合適的窗函數(shù),。窗函數(shù)越寬，抑制雜波能力越強(qiáng),；窗函數(shù)越窄,，分辨率越高。
2.2? 信號處理和分析
??? 利用LabVIEW的Signal Processing Suite專用軟件包,、函數(shù)和子程序庫,，對采集的水電機(jī)組信號進(jìn)行處理和分析，主要包括非線性變換,、數(shù)字濾波,、時域分析、頻域分析,、小波分析,、軸心軌跡分析等。
??? ?（1）非線性變換：由于傳感器結(jié)構(gòu)的特點(diǎn),，它輸出的直流電壓值不是完全線性的,，這就造成了最終距離參數(shù)難以直接獲得。采用曲線擬合辦法可以很好地實(shí)現(xiàn)信號的非線性變換,。
??? （2）數(shù)字濾波：為了彌補(bǔ)硬件濾波器的不足,，提高設(shè)備的可靠性，采用諧波去除法作為軟件濾波的方法,。運(yùn)用ReFFT（）函數(shù)對現(xiàn)場采集的信號進(jìn)行快速傅立葉變換,，在生成的幅值頻譜中將事先規(guī)定的截止頻率以上的頻率成分設(shè)為0，然后再運(yùn)用ReInvFFT（）函數(shù)進(jìn)行傅立葉反變換,，求出濾波后的時域數(shù)據(jù)。
??? （3）時域分析：主要是時域波形顯示（包括實(shí)時數(shù)據(jù)隨時間變化圖及局部放大及縮?。?、波形特征值的計(jì)算（包括計(jì)算振動/擺度的峰峰值的均值、方差等）,、相位分析（包括測點(diǎn)信號的相位隨時間變化及不同測點(diǎn)之間的相位差）及其相關(guān)分析（通過兩個量之間相關(guān)變化找出自變量如水頭和開度等對振動/擺度的影響）等,。
??? （4）頻域分析：將整周期采集的信號進(jìn)行快速傅立葉變換，得到振動信號的頻譜,。分析功能主要有幅值譜分析,、功率譜分析以及頻譜圖（包括頻譜分量的最大值及該最大值發(fā)生的頻率）的計(jì)算和顯示等。
??? （5）小波分析：傅立葉變換對水電機(jī)組振動信號中出現(xiàn)的奇異點(diǎn)有時難以準(zhǔn)確識別,，而這種奇異點(diǎn)的出現(xiàn),，通常又與故障的發(fā)生緊密相連,，而小波分析在噪聲消除、微弱信號的提取和圖像處理等方面具有明顯的優(yōu)勢,，故小波分析也是水電機(jī)組振動信號分析的有用工具,。應(yīng)用小波分析技術(shù)對振動信號進(jìn)行“細(xì)化和放大”，使振動信號更加清晰,，以便于捕捉振動信號變化的特征點(diǎn),，尤其是對突變信號的處理優(yōu)勢明顯。
??? （6）軸心軌跡分析：動態(tài)間隙顯示,、動/靜態(tài)軸心軌跡曲線,、動/靜態(tài)諧波軸心軌跡曲線。
2.3 數(shù)據(jù)庫的設(shè)計(jì)
??? 數(shù)據(jù)庫選用SQL Server 2000,，利用LabVIEW 6i開發(fā)平臺內(nèi)帶的SQL Toolkit工具包與數(shù)據(jù)庫進(jìn)行聯(lián)系,，通過SQL Toolkit可以訪問大多數(shù)關(guān)系型數(shù)據(jù)庫（如Oracle、Informix,、Sybase,、MS SQL Server等），用SQL語句可實(shí)現(xiàn)對數(shù)據(jù)庫的查詢,、修改和增刪等操作[6],。數(shù)據(jù)庫分為實(shí)時數(shù)據(jù)和歷史數(shù)據(jù)兩種。實(shí)時數(shù)據(jù)主要有機(jī)組配置及數(shù)據(jù)采集參數(shù),、各振動和擺度原始波形,、各振動和擺度頻譜數(shù)據(jù)、各振動和擺度特征數(shù)據(jù),、狀態(tài)參數(shù)數(shù)據(jù),。歷史數(shù)據(jù)主要有：機(jī)組正常運(yùn)轉(zhuǎn)的歷史數(shù)據(jù)，按年,、月,、日等進(jìn)行分檔壓縮存儲；機(jī)組出現(xiàn)異常情況的歷史數(shù)據(jù),，用于事故追憶,。
??? 通過在LabVIEW，系統(tǒng)平臺上開發(fā)的基于PXI平臺的水電機(jī)組振動監(jiān)測系統(tǒng)集振動測試,、數(shù)據(jù)采集,、處理和分析為一體，能迅速而有效地把水電機(jī)組在各種過程中的振動情況整理成資料和圖形,，如波特圖,、極坐標(biāo)圖、波形圖、軌跡圖,、三維譜圖,、軸中心位置圖、振動數(shù)據(jù)庫等,，以便對水電機(jī)組的振動情況分析和故障診斷,。該系統(tǒng)已安裝在多臺水電機(jī)組上。運(yùn)行結(jié)果表明,，與傳統(tǒng)監(jiān)控系統(tǒng)相比,，虛擬儀器方案不僅系統(tǒng)結(jié)構(gòu)緊湊，構(gòu)成靈活,，且功能豐富,，通過修改軟件功能易于擴(kuò)展，具有很高的性價比,，監(jiān)控過程可實(shí)現(xiàn)無人值守,，通過聯(lián)網(wǎng)可實(shí)現(xiàn)遠(yuǎn)程監(jiān)控。因此基于虛擬儀器的水電機(jī)組振動監(jiān)測系統(tǒng)具有十分廣闊的應(yīng)用前景,。
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