超聲波液位計(jì)測(cè)量水位的原理以及安裝要求 超聲波液位計(jì)工作時(shí)，高頻脈沖聲波由換能器(探頭)發(fā)出，遇被測(cè)物體(水面)表面被反射，折回的反射回波被同一換能器(探頭)接收，轉(zhuǎn)換成電信號(hào)。脈沖發(fā)送和接收之間的時(shí)間(聲波的運(yùn)動(dòng)時(shí)間)與換能器到物體表面的距離成正比，聲波傳輸?shù)木嚯xs與聲速c和傳輸時(shí)間t之間的關(guān)系可以用公式表示：s= cⅹt/2 例如：聲速c=344m/s，傳輸時(shí)間為50ms，即可算出傳輸?shù)木?/p>
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2010年11月13日
超聲波液位計(jì)測(cè)量水位的原理以及安裝要求
Tags: 超聲波液位計(jì)測(cè)量水位的原理以及安裝要求
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