利用差壓原理的渦街信號(hào)檢測(cè)方法研究

采用壓電傳感器的渦街流量計(jì)在測(cè)量中容易受到管道振動(dòng)和流場(chǎng)振動(dòng)的影響, 測(cè)量精度下
降L對(duì)漩渦發(fā)生體周?chē)鲌?chǎng)進(jìn)行分析, 發(fā)現(xiàn)在發(fā)生體兩側(cè)存在相位差為180°且振動(dòng)幅度和頻率相等的流體振動(dòng)點(diǎn), 根據(jù)這一特點(diǎn), 提出采用差壓原理檢測(cè)渦街信號(hào)的新方法, 這種方法能抵抗噪聲, 穩(wěn)定性好,實(shí)現(xiàn)方便, 適應(yīng)性強(qiáng)L
【關(guān)鍵詞】　渦街流量計(jì); 壓力測(cè)量; 信號(hào)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