采用壓電傳感器的渦街流量計在測量中容易受到管道振動和流場振動的影響, 測量精度下
降L對漩渦發生體周圍流場進行分析, 發現在發生體兩側存在相位差為180°且振動幅度和頻率相等的流體振動點, 根據這一特點, 提出采用差壓原理檢測渦街信號的新方法, 這種方法能抵抗噪聲, 穩定性好,實現方便, 適應性強L
【關鍵詞】　渦街流量計; 壓力測量; 信號處理
Abstract: Vo rtex f lowm eter based on p ieazoelect ric t ran sducer is sub jected to no ise dis2
tu rbances cau sed by p ipe vib rat ion s and f lu id tu rbu lence du ring m easu rem en t, so that the m easu rem en t accu racy decreases. A cco rding to the characterist ics of the f lu id f ield near the b luff body, a new m ethod u sing differen t ial p ressu re to m easu re vo rtex f requency is p resen ted. Th is m ethod w h ich can reduce the effect of no ises, has a h igher stab ility and bet ter adap tab ility, can be easily realized.
Key words: vo rtex f lowm eter; p ressu re m easu rem en t; signal p rocessing