Research of fiber optical Bragg grating flowmeter based on vortex occurred body

Q4 Physics and Astronomy

光学技术 Pub Date : 2014-01-01 DOI:10.3788/GXJS20144001.0079

仝克帅 Tong Keshuai, 薛俊华 Xue Junfei, 杨洪磊 Yang Honglei, 闫思安 Yan Si-an, 李川 Li Chuan, 李英娜 Li Yingna, 赵振刚 Zhao Zhengang, 熊新 Xiong Xin

引用次数: 1

Abstract

By combining the fiber grating sensing technique with vortex separation principle,a model of FBG vortex flow meter is researched based on triangular columnar.A pilot pressure cavity is installed in the central of triangular prism spiral bluff body,inside the cavity.Equal strength cantilever beam is set which is pasted Bragg grating.When the fluid passes through both sides of the body,alternate vortex is separated.Pulsating fluid pressure is produced inside the pilot pressure cavity.Vibration of equal strength cantilever beam is produced which vibration frequency is proportional to the frequency of vortex separation.The fluid flow is measured by detecting the vibration frequency.Experiment results show that the linearity of the flow meter is 4.38% FS,instrument coefficient is K=3.659,and the fiber Bragg grating wavelength shift frequency respond to flow rate is 1.182Hz/(m3/h).

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基于涡发生体的光纤光栅流量计研究

将光纤光栅传感技术与涡流分离原理相结合，研究了一种基于三角柱状结构的光纤光栅涡流流量计模型。在三角棱柱螺旋钝体的中心，在腔体内部安装先导压力腔。设置了粘贴布拉格光栅的等强度悬臂梁。当流体通过机体两侧时，交替涡被分离。先导压力腔内产生脉动流体压力。等强度悬臂梁产生振动，振动频率与旋流分离频率成正比。通过检测振动频率来测量流体的流量。实验结果表明，该流量计的线性度为4.38% FS，仪表系数K=3.659，光纤布拉格光栅波长移频对流量的响应为1.182Hz/(m3/h)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

光学技术 Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

0.60

自引率

0.00%

发文量

6699

期刊介绍： The predecessor of Optical Technology was Optical Technology, which was founded in 1975. At that time, the Fifth Ministry of Machine Building entrusted the School of Optoelectronics of Beijing Institute of Technology to publish the journal, and it was officially approved by the State Administration of Press, Publication, Radio, Film and Television for external distribution. From 1975 to 1979, the magazine was named Optical Technology, a quarterly with 4 issues per year; from 1980 to the present, the magazine is named Optical Technology, a bimonthly with 6 issues per year, published on the 20th of odd months. The publication policy is: to serve the national economic construction, implement the development of the national economy, serve production and scientific research, and implement the publication policy of "letting a hundred flowers bloom and a hundred schools of thought contend".