密闭空间雾滴沉积状态参数的显微图像解析

Analysis of Droplets Deposition Parameters Based on Micrograph in Airtight Space

针对植保机械喷雾取样技术存在的不足,提出了利用显微图像结合数字图像处理技术对密闭空间中雾滴的沉积状态参数进行取样和分析的方法。利用该方法对棚室内雾滴覆盖率、沉积密度和均匀性等参数进行了试验和分析。试验结果表明,随距离增加,雾滴覆盖率先上升后下降,而雾滴沉积密度的变化趋势正好相反;棚室内距地面高度0.4-0.8m范围内,雾滴的覆盖率和沉积密度基本不随高度变化。用雾滴覆盖率、沉积密度和均匀性来表示整个喷雾场雾滴的沉积状态是有效、可行的。

In order to solve the problems of sampling technology in spraying, a new measurement memod of using micrograph combining with digital image processing technology for spraying deposition parameters analysis and sample in airtight space was given. With this method, the parameters of spraying deposition in entire spraying field could be analyzed, such as spraying coverage, droplets density, spraying uniformity and etc. During the experiment, it was found that with the increasing distance, droplet spraying coverage rose firstly and then declined, but the droplets density was of the opposite trend. The spraying coverage and droplets density would not change at the height of 0.4 0.8 m on the ground. It is feasible to describe the droplets deposition in the spraying field by using the spraying coverage, droplets density and spraying uniformity.