流量計-渦街流量計的測量方法和選用渦街流量計-流量測量方法和儀表的選用在特定的流動條件下，一部分流體動能轉(zhuǎn)化為流體振動，其振動頻率與流速（流量）有確定的比例關(guān)系，依據(jù)這種原理工作的流量計稱為流體振動流量計。目前流體振動流量計有三類：渦街流量計、旋進(jìn)（旋渦進(jìn)動）流量計和射流流量計。流體振動流量計具有以下一些特點(diǎn)： 1）輸出為脈沖頻率，其頻率與被測流體的實(shí)際體積流量成正比，它不受流體組分、密度、壓力
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