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首页> 外文期刊>Measurement Science & Technology >Investigation of droplet distribution in electrohydrodynamic atomization (EHDA) using an ac-based electrical capacitance tomography (ECT) system with an internal-external electrode sensor
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Investigation of droplet distribution in electrohydrodynamic atomization (EHDA) using an ac-based electrical capacitance tomography (ECT) system with an internal-external electrode sensor

机译：使用带有内部-外部电极传感器的基于ac的电容层析成像（ECT）系统研究电动流体雾化（EHDA）中的液滴分布

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Electrohydrodynamic atomization (EHDA) has recently been applied to the fabrication of polymeric micro- or nano-particles or fibres for drug encapsulation. For in situ monitoring of pharmaceutical particle fabrication in an EHDA encapsulation chamber, electrical capacitance tomography (ECT) has been used as a non-invasive measurement technique. The key achievements made during this study include the successful monitoring of very dilute droplet and particle trajectories in different regions of the EHDA encapsulation chamber. The results of both a charge/discharge ECT system and an ac-based ECT system are compared. A new type of ECT sensor with internal and external electrodes is used to improve the sensitivity of ECT measurement for detection of the objects in the central area of the EHDA encapsulation chamber. The water-air and dicholoromethane (DCM)-air systems in the dripping and spray modes have been investigated to determine the feasibility of imaging water and DCM droplets of low concentration in the encapsulation chamber using ECT.
机译：电流体动力学雾化（EHDA）最近已应用于制造用于药物封装的聚合物微粒或纳米颗粒或纤维。为了对EHDA封装室中的药物颗粒制造进行现场监控，电容层析成像（ECT）已被用作非侵入性测量技术。在这项研究中取得的关键成就包括成功监测了EHDA封装室不同区域中非常稀薄的液滴和粒子轨迹。比较了充电/放电ECT系统和基于ac的ECT系统的结果。一种新型的带有内部和外部电极的ECT传感器可用于提高ECT测量的灵敏度，以检测EHDA封装室中心区域中的物体。已经研究了滴灌和喷雾模式下的水-空气和二氯甲烷（DCM）-空气系统，以确定使用ECT对封装室中低浓度的水和DCM液滴进行成像的可行性。

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