Measurement of Atmosphere Ground Layer Parameters for Air Quality Assessment by UAV Utilization

Import 05/08/2014Bakalářská práce pojednává o možnosti měření parametrů přízemní vrstvy atmosféry pomocí bezpilotního prostředku. Na bezpilotní prostředek byly umístěny snímače prachu, oxidu uhelnatého, teploty a vlhkosti. Podle určitého postupu byly naplánovány a provedeny dvě série letů, které jsou následně vyhodnoceny. Bakalářská práce mimo jiné obsahuje popis bezpilotního systému s názvem Stalker.Bachelor thesis deals about opportunity to measure atmosphere ground layer parameters by UAV Utilization. In front part of UAV was placed dust sensor, carbon dioxide sensor, temperature and density sensor. According the certain procedure was planned and performed two series of flights. Flights are subsequently evaluated. Part of bachelor thesis is description of UAS named Stalker.342 - Institut dopravyvýborn

Sketches of two main droplet evaporation mode for droplets containing low concentrations of (a, b) 0.001% to 0.005% and high concentrations of (c, d) 0.01% to 0.05%.

<p><b>Figs (b) and (d) show enlarged sections of (a) and (c), respectively.</b> The color changes are used to represent the evaporation of the droplets. The blue dots respect the vapor evaporated from the droplet surface. Also, the density in Fig (a) with a worse wetting state is higher than that of Fig (c), which has a better wetting state. The higher density of vapor within the small narrow region also restricts the evaporation rate of the droplet.</p

The scanning electron micrograph of the rice leaf surface used in the experiment.

<p>The scanning electron micrograph of the rice leaf surface used in the experiment.</p

Evolution of the height for water-only droplet and droplets of different concentrations of surfactant with an initial volume of 4 μL on the surface of a rice leaf.

<p>Evolution of the height for water-only droplet and droplets of different concentrations of surfactant with an initial volume of 4 μL on the surface of a rice leaf.</p

The typical changes in contact angle and contact diameter of pure water droplets (0%), relatively low concentrations (0.001%, 0.005%), and high concentrations (0.01%, 0.05%).

<p>Furthermore, various evaporation times to achieve the same normalized volume is listed under each image.</p

Average time required to evaporate 90% of the volume of a pure water droplet and those containing different concentrations of adjuvant (initial volume ≈ 4 μL) on natural rice leaf surfaces.

<p>Average time required to evaporate 90% of the volume of a pure water droplet and those containing different concentrations of adjuvant (initial volume ≈ 4 μL) on natural rice leaf surfaces.</p

Evolution of the ratio of contact angle and contact diameter (contact angle/contact diameter vs. time) for pure water droplets and droplets containing different concentrations of surfactant over the evaporation period.

<p>Evolution of the ratio of contact angle and contact diameter (contact angle/contact diameter vs. time) for pure water droplets and droplets containing different concentrations of surfactant over the evaporation period.</p