Optimum design of measuring sensor for circumference liquid film in gas-liquid annular flow

Ting XUE; Ce ZHOU; Zhuo-lin LI

doi:10.3788/OPE.20172512.3145

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Optimum design of measuring sensor for circumference liquid film in gas-liquid annular flow

Modern Applied Optics | 更新时间：2020-07-07

- Optimum design of measuring sensor for circumference liquid film in gas-liquid annular flow
- Optics and Precision Engineering Vol. 25, Issue 12, Pages: 3145-3151(2017)
- 作者机构：
  
  天津大学电气自动化与信息工程学院, 天津 300072
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20172512.3145
  CLC： TP242.6
- Received：04 May 2017，
  
  Accepted：19 June 2017，
  
  Published：25 December 2017
- 稿件说明：
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Ting XUE, Ce ZHOU, Zhuo-lin LI. Optimum design of measuring sensor for circumference liquid film in gas-liquid annular flow[J]. Optics and precision engineering, 2017, 25(12): 3145-3151.
DOI：

Ting XUE, Ce ZHOU, Zhuo-lin LI. Optimum design of measuring sensor for circumference liquid film in gas-liquid annular flow[J]. Optics and precision engineering, 2017, 25(12): 3145-3151. DOI： 10.3788/OPE.20172512.3145.

摘要

以气液两相环状流管道横截面的周向液膜为测量对象，采用单台高速摄像机和平面反射镜组构建了虚拟双视角的视觉传感器，并对传感器进行了优化。基于虚拟双目立体视觉原理建立虚拟双视角视觉传感器测量模型。为了尽可能增大有效拍摄视角以获得更多液膜流动信息，综合考虑视场区域、传感器尺寸、测量距离以及管道光路折射等因素，对虚拟双视角视觉传感器模型进行了分析和设计，优化了传感器模型的结构参数。理论分析及实验结果表明：优化后的虚拟双视角视觉传感器可以获得近300°的有效周向测量视角，远远优于使用单台高速摄像机进行直接拍摄。该项研究为通过双视角视觉传感器进行气液两相环状流周向液膜的实时测量提供了理论基础，对研究液膜厚度和分析环状流流动状态具有重要意义。

Abstract

By taking the circumference liquid films of cross-sectional pipe in gas-liquid two-phase annular flow for measuring objectives

a novel visual sensor with virtual two-visual angles was designed and optimized by combining a single high-speed camera and planar reflectors. Based on the virtual binocular stereo vision principle

a measurement model for visual sensor with two-visual angles was established. To maximize the effective measurement angle and to obtain much liquid film flow informations

the model of the virtual double-view vision sensor was analyzed and its structure parameters were optimized by considering the field of view

sensor size

measuring distance and the optical path refraction of the pipe. The theory analyzing and experimental results indicate that the optimized sensor can get a view field closed to 300° effective circumference visual angle

which is far better than that using a single high-speed camera to capture directly. It provides a theoretical basis for the real-time measurement of the gas-liquid two-phase annular flow circumference liquid films through the double-view vision sensor

and has great significance to study the film thickness and analyze the flow state of the annular flow.

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references

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