由于喷雾干燥中雾滴的运动较复杂,所以目前多是通过实验测量来确定雾滴粒度分布,有很多不便因素。
There is much inconvenience in measuring particle size distribution by experiments at present, because of droplets movement complexity in spray drying.
首先,从理论上分析雾滴破碎的机理,找出影响雾滴尺寸和均匀性的主要因素。
Firstly, the paper analyse the theory of fogdrop fragmentation and find the primary factors about affecting fogdrop sizes and uniformity.
具有引人注目雾滴的阳光形成了天空中的白色彩虹。由于这些雾滴过于微小,它们不能像那些较大的雨滴那样,作为棱镜以形成典型的彩虹。
White rainbows result from sunlight striking fog droplets which are so tiny that they can not act as prisms, like larger raindrops do for typical rainbows.
根据雾滴前向驻点处有限直径粒子的沉积行为分析了雾滴与粒子间的静电作用对小粒子捕集效果的影响。
The mass transfer rate at the forward stagnation point of the droplet is derived to show the effect of electrostatic forces on the collection of submicron particles.
简要介绍了雾滴图像采集硬件系统的组成和原理,主要介绍了雾滴图像处理和雾滴尺寸测量与分析软件部分的实现方法。
This paper briefly introduces the system and principle of capturing fogdrop image. And then mainly introduces the software of fogdrop image processing and fogdrop size measuring.
通过建立利用标记点跟踪和雾滴邻域匹配概率方法对相邻图像中的同一雾滴进行了匹配跟踪,能够实现对雾滴运动轨迹的拟合。
The trace of droplet in different frames has been tracked with the method, which is based on flag tracking and droplet neighborhood matching probability technique.
对雾滴进行标记,消除小雾滴。
并对未经软件处理和经过软件处理后的雾滴显微图像进行量化分析比较,经过软件处理后所得到的雾滴沉积状态参数,增加了统计精度。
The images before being processed and after being processed with the software were compared and the droplets deposition parameters being processed can improve the precision of the system.
针对雾滴显微图像的特点,建立获取雾滴显微图像的硬件系统和图像处理分析的软件系统。
According to the characteristic of the droplets the software system to deal with the images and hardware system to obtain the droplets images were set up.
雾滴的散射通过三个方面对图像产生影响:雾滴对成像光线的透射衰减,空气光即非成像光线的散射及雾滴的多次散射。
The scattering of fog particle influence the images by three aspects: the attenuation of object light, the scattering of air light and the multi-scattering of fog particle.
在喷雾试验中主要以雾滴在作物上的覆盖密度、雾滴均匀程度和施药量为标准。
Test the spray droplet main crops in the coverage density, and uniformity of droplet spray volume as the standard.
在喷雾试验中主要以雾滴在作物上的覆盖密度、雾滴均匀程度和施药量为标准。
Test the spray droplet main crops in the coverage density, and uniformity of droplet spray volume as the standard.
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