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    SIEMENS管段式超聲波流量儀表是以“速度差法”為原理，測量圓管內(nèi)液體流量的儀表。它采用了良好的多脈沖技術(shù)、信號(hào)數(shù)字化處理技術(shù)及糾錯(cuò)技術(shù)，使流量儀表更能適應(yīng)工業(yè)現(xiàn)場的環(huán)境，計(jì)量更方便、經(jīng)濟(jì)、準(zhǔn)確。產(chǎn)品達(dá)到*水平，可廣泛應(yīng)用于石油、化工、冶金、電力、給排水等領(lǐng)域。
    SIEMENS超聲波流量計(jì)是通過檢測流體流動(dòng)對(duì)超聲束(或超聲脈沖)的作用以測量流量的儀表。
    原理
    根據(jù)對(duì)信號(hào)檢測的原理超聲流量計(jì)可分為傳播速度差法(直接時(shí)差法、時(shí)差法、相位差法和頻差法)、波束偏移法、多普勒法、互相關(guān)法、空間濾法及噪聲法等。
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    SIEMENS流量計(jì)現(xiàn)貨直銷中
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    SIEMENS超聲波流量計(jì)由超聲波換能器、電子線路及流量顯示和累積系統(tǒng)三部分組成。超聲波發(fā)射換能器將電能轉(zhuǎn)換為超聲波能量，并將其發(fā)射到被測流體中，接收器接收到的超聲波信號(hào)，經(jīng)電子線路放大并轉(zhuǎn)換為代表流量的電信號(hào)供給顯示和積算儀表進(jìn)行顯示和積算。這樣就實(shí)現(xiàn)了流量的檢測和顯示。
    SIEMENS超聲波流量計(jì)常用壓電換能器。它利用壓電材料的壓電效應(yīng)，采用適出的發(fā)射電路把電能加到發(fā)射換能器的壓電元件上，使其產(chǎn)生超聲波振勸。超聲波以某一角度射入流體中傳播，然后由接收換能器接收，并經(jīng)壓電元件變?yōu)殡娔?，以便檢測。發(fā)射換能器利用壓電元件的逆壓電效應(yīng)，而接收換能器則是利用壓電效應(yīng)。
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