流体振动流量计的抗干扰研究  

Study on Anti-interference Technology for Fluidic Oscillation Flowmeter

作　　者：叶朋 潘友艺 叶波 

机构地区：[1]天信仪表集团有限公司,浙江苍南325800

出　　处：《自动化仪表》2009年第8期1-3,7,共4页Process Automation Instrumentation

摘　　要：流体振动流量计主要包括涡街流量计和旋进流量计2种类型,具有无可动部件、精度高、范围宽、使用可靠等优点。但是,流体压力波动和机械振动等干扰容易降低流量计的信噪比,甚至使其无法正常计量。在研究流量计的旋涡脱落诱发流体振动特性的基础上,提出了采用差动式传感器消除干扰信号影响的方法,并设计了具有较高抗干扰性能的流体振动流量计。The fluidic oscillation flowmeter mainly includes vortex flowmeter and swirl flowmeter. It features no moving parts, highly accurate, wide-range and reliable. However, the interferences caused by fluidic pressure fluctuation and mechanical vibration will reduce its signal-tonoise ratio, even make it impossible to measure properly. On the basis of the characteristic of fluidic vibration induced by vortex shedding,the method of adopting differential sensor to eliminate the influence is proposed, thus the fluidic oscillation flowmeter with high anti-interference capability is successfully developed.

关 键 词：傅里叶变换 流量计 传感器 流体振动 压力波动 

分 类 号：TH814[机械工程—仪器科学与技术] TN974[机械工程—精密仪器及机械]