液體流量計原理：超聲波流量計測量液體原理：當超聲波束在液體中傳播時，液體的流動將使傳播時間產(chǎn)生微小變化，其傳播時間的變化正比于液體的流速，其關(guān)系符合下面表達式： 其中 θ 為聲束與液體流動方向的夾角M 為聲束在液體的直線傳播次數(shù)D 為管道內(nèi)徑Tup 為聲束在
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