CIESC Journal ›› 2024, Vol. 75 ›› Issue (1): 211-220.DOI: 10.11949/0438-1157.20230676

• Fluid dynamics and transport phenomena • Previous Articles     Next Articles

Microdispersion droplet optical fiber detection

Weigu WEN1(), Zhihong YUAN1, Kai WANG1,2(), Guangsheng LUO1,2   

  1. 1.Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
    2.State Key Laboratory of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2023-07-03 Revised:2023-10-16 Online:2024-03-11 Published:2024-01-25
  • Contact: Kai WANG

微分散液滴的光纤检测研究

温唯谷1(), 袁志宏1, 王凯1,2(), 骆广生1,2   

  1. 1.清华大学化学工程系,北京 100084
    2.清华大学化学工程联合国家重点实验室,北京 100084
  • 通讯作者: 王凯
  • 作者简介:温唯谷(1999—),男,硕士研究生,wwg22@mails.tsinghua.edu.cn
  • 基金资助:
    国家自然科学基金项目(21991104);清华大学-中国石油化工集团有限公司绿色化工联合研究院资助项目(20212930034)

Abstract:

Microdispersion is an important part of microchemical technology. The traditional method of analyzing and counting microdispersed droplets using the microscopic camera is costly and difficult to be promoted. This paper proposes a microdispersion droplet online detection technology based on fiber optic sensing. The method is based on diffuse reflective fiber, optical fiber sensor, data acquisition card, and LabVIEW program to detect droplet generation frequency and length in microchannels online. The method meets the detection of droplets with a diameter over 0.21 mm, and the upper limit of detection frequency is 500 Hz. When the droplet passes through the fiber for more than 15 ms, the method can also detect the droplet length. The results show that fiber diameter and fiber sensor response time are the main factors affecting the detection performance of the method. Compared with similar platforms, higher detection performance has been achieved at a lower cost.

Key words: microchannel, microdispersion, photoelectric detection, optical fiber sensor, droplet detection

摘要:

微分散是微化工技术的重要组成部分,传统利用显微摄像分析和统计微分散液滴的方法成本高,不易推广。提出了一种基于光纤传感的微分散液滴在线检测技术,该方法基于漫反射光纤、光纤传感器、数据采集卡和LabVIEW程序实现了微通道内液滴生成频率和长度的在线检测,满足0.21 mm以上直径液滴的检测,检测频率上限为500 Hz,当液滴通过光纤时间超过15 ms时,还可检测液滴长度。研究结果表明光纤直径和光纤传感器响应时间是影响该方法检测性能的主要因素,与相似平台对比,以较低的成本实现了较高检测性能。

关键词: 微通道, 微分散, 光电检测, 光纤传感器, 液滴检测

CLC Number: