<b>Droplets velocity estimated by impact forces</b>

Abstract

The velocity of the sprayed droplets indicates the force those droplets impact with the target surface and can indicate its trajectory (penetration form) in the interior of the canopy. In order to estimate the droplets velocity two methods were developed - the droplets impact force over a surface and the liquid flow rate measurement. To measure the impact forces  it was used  an  impact plate with high  sensitivity hardwired  to  a microcomputer  equipped with  software capable to register forces with low intensity. At the same time  it was developed a system of  liquid collection with the same area of collection of the impact plate and used a precision scale to quantify the liquid that passes in that section.  Afterwards,  the velocity of  the droplets  sprayed by diff erent nozzles was estimated.  The results show that it  is possible  to  collect  the droplets  impact  forces using an impact plate with high sensitivity and also to measure the liquid fl  ow rate that passes to the same section of the impact plate.  It is possible to estimate the velocity of the droplets  sprayed by diff  erent nozzles  using  the  impact forces and the liquid fl  ow rate that goes through the same area of the plate.