基于感应原理的界面特性探测技术研究

发布时间：2018-04-16 16:15

本文选题：界面位置探测 + 感应原理　；参考：《大连海事大学》2015年硕士论文

【摘要】：随着科技水平的不断提高,界面位置及其相关的性能参数(如zeta电势)的探测在船舶、机械、生物化工以及环境污染物检测等许多领域均具有重要的作用。目前,虽然有许多不同的检测方法技术,但是针对某些特定或极端的应用环境,发展新的、更加便捷的探测技术仍具有十分重要的意义。本文提出了一种基于感应原理的界面特性探测方法,分析了其工作原理并搭建了检测系统,实现了油水界面位置的探测,以及气-液界面和固-液界面处zeta电势的精确测量。具体来看,本文的研究内容主要有：(1)开展了基于感应原理的油水界面位置的探测和油液成分的区分研究。研究结果表明：根据电压脉冲信号出现的时间,以及检测过程中检测电极的下降速度,可以快速、准确地判断出油水界面的位置,而且通过对柴油-超纯水、润滑油-超纯水和柴油-海水、润滑油-海水界面四种不同油水界面位置的检测,实现了油液介电特性的区分。(2)开展了气-液界面zeta电势的检测研究。研究结果表明：该方法可以快速、准确的预测溶液-空气两相界面的位置以及zeta电势,并且测量结果与溶液中的离子种类及离子浓度无关。(3)开展了PDMS微通道壁面zeta电势的测量研究。研究结果表明：结合自行设计的PDMS微通道,可以准确的测量PDMS-溶液界面处的zeta电势,并且通过改变PDMS绝缘层的厚度以及外接电阻的阻值,可以有效的提高检测灵敏度,并为微流控芯片内一系列电动现象的分析和操控奠定了基础。本文提出的感应式界面探测技术具有结构简单、检测速度快等突出优点,有望结合该技术发展一种新型的便携式界面检测仪器。
[Abstract]:With the development of science and technology, the detection of interface position and related performance parameters (such as zeta potential) plays an important role in many fields, such as ship, machinery, biochemical industry and environmental pollutant detection.At present, although there are many different detection methods and techniques, it is still of great significance to develop new and more convenient detection techniques for some specific or extreme application environments.In this paper, a method of detecting interface characteristics based on induction principle is proposed, and its working principle is analyzed and a detection system is set up to realize the detection of the position of oil-water interface and the accurate measurement of zeta potential at gas-liquid interface and solid-liquid interface.In detail, the main research contents of this paper are: (1) the detection of oil-water interface position and the discrimination of oil composition based on induction principle are carried out.The results show that the location of oil-water interface can be determined quickly and accurately according to the time when the voltage pulse signal appears and the decreasing speed of the detecting electrode during the detection process, and the location of the oil-water interface can be determined quickly and accurately by using the diesel-ultrapure water.The detection of four different oil-water interface positions between lubricating oil ultra-pure water and diesel-seawater and lubricating oil seawater interface has realized the distinction of oil dielectric characteristics. (2) the zeta potential of gas-liquid interface has been detected and studied.The results show that this method can quickly and accurately predict the location of the solution-air two-phase interface and the zeta potential.The measurement results are independent of the ion type and ion concentration in the solution. (3) the measurement of zeta potential on the wall of PDMS microchannel is carried out.The results show that the self-designed PDMS microchannel can accurately measure the zeta potential at the interface of PDMS-solution, and the detection sensitivity can be improved by changing the thickness of the PDMS insulation layer and the resistance value of the external resistor.It also lays a foundation for the analysis and control of a series of electric phenomena in microfluidic chips.The inductive interface detection technology proposed in this paper has the advantages of simple structure and high detection speed. It is expected to develop a new portable interface detection instrument combined with this technology.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U698.7;X834

【引证文献】