作者：宋红伟, 郭海敏, 戴家才

作者单位：长江大学地球物理与石油资源学院, 湖北 荆州 434023

关键词：漩涡发生体; 强度调制光纤传感器; 微弯损耗; 涡漩频率

摘要：

本文主要分析了流体的涡漩运动特性,结合强度调制光纤的传感原理,和光纤的微弯损耗特性和多模光纤模式间干涉的结果,设计了一种同时测量流体的流量和密度的新型流量、密度计。该仪器通过光纤频率检测系统和光纤举力检测系统分别检测流体流过漩涡发生体产生的稳定漩涡发生频率f和流体作用在漩涡发生体上的升力。结合卡门涡街理论和茹科斯基升力定理计算出流体流量和稳定漩涡发生频率f的线性关系和流体密度与稳定漩涡发生频率f和流体作用在漩涡发生体上的升力的关系。并设计出同时检测漩涡频率f和升举力仪器的系统原理图。

Research of optical fiber eddy-flow and densimeter

SONG Hong-wei, GUO Hai-min, DAI Jia-cai

School of Geophysics and Oil Resources, Yangtze University, Jingzhou 434023, China

Abstract: This article analyzed eddy properties of fluids and optical fiber sensors of modulation uminous intensity,Utilize the micro-bending loss property and the result of interfering among many mould optic fibre modes of the optic fibers,have designed a kind of new-type flow of the flow and densimeter of measuring the rate of flow and density at the same time.This instrument can detect the variation of the lifting force produce produced when fluid flows through eddy generator and the vortex frequency with frequency detection system of optic fibre and the optic fibre detection system of lifting force.Derive out the relation of flow and the stability vortex frequency and the relation of fluid density and the stability vortex frequency.

Keywords: Eddy generator; Optical fiber sensors of modulation uminous intensity; Micro-bending loss property; Vortex frequency

2006, 32(2): 136-138  收稿日期: 2005-3-16;收到修改稿日期: 2005-5-12

基金项目: 中国石油天然气集团公司科技攻关项目(2004Z0201)

作者简介: 宋红伟(1978-),男,硕士研究生,助教,主要从事地球物理测井的教学和科研工作。

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