利用差压原理的涡街信号检测方法研究

采用压电传感器的涡街流量计在测量中容易受到管道振动和流场振动的影响, 测量精度下
降L对漩涡发生体周围流场进行分析, 发现在发生体两侧存在相位差为180°且振动幅度和频率相等的流体振动点, 根据这一特点, 提出采用差压原理检测涡街信号的新方法, 这种方法能抵抗噪声, 稳定性好,实现方便, 适应性强L
【关键词】　涡街流量计; 压力测量; 信号处理
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