基于白光干涉原理的全光纤涡街流量测量方法  

Optical fiber vortex-shedding flow measurement based on white-light interference

作　　者：赵栋[1] 吴红艳[1] 唐璜[1] 

机构地区：[1]复旦大学材料科学系上海200433

出　　处：《仪器仪表学报》2011年第5期1038-1042,共5页Chinese Journal of Scientific Instrument

基　　金：国家973计划课题(No.2010CB327805);国家863计划课题(No.2008AA040207)资助项目

摘　　要：光纤涡街流量计在保留涡街类流量计优点的基础上,同时又具有光纤传感器无电磁辐射、抗电磁干扰、体积小、形状可变、环境适应性强等特殊优点,尤其是在易燃易爆环境中的应用,近年来得到了很大发展。文中介绍了一种新型的基于白光干涉原理的全光纤涡街流量测量方法及其结构,它只对动态参量响应,而屏蔽了静态、准静态干扰因素。基于该方法的流量计不仅具有光学干涉类传感器的高灵敏性,同时克服了传统干涉类传感器不稳定的缺点。最后,通过实验验证了该方法的可行性。Optical-fiber vortex-shedding flowmeter has got extensive application in measurement field because it not only preserves the merits of vortex-shedding flowmeter but also has some special characteristics of optical fiber sensor,such as flexibility,endurance,anti-electromagnetic interference capacity and adaptation in flammable explosive environment.A new optical-fiber vortex-shedding flowmeter based on white-light interference principle is introduced in this paper.Only responding to dynamic disturbance,the all-fiber white-light interferometric flowmeter not only has the high-sensitivity of interferometric sensors,but also overcomes the instability of traditional interferometric sensors that tend to be affected by external environmental condition such as temperature fluctuation.At last,experimental results prove the feasibility of the proposed method.

关 键 词：涡街 流量计 光纤 白光 传感器 

分 类 号：TB937[一般工业技术—计量学]