Robotický efektor pro manipulaci s plastovým výliskem

Bakalářská práce obsahuje rešerši koncových efektorů průmyslových robotů obecně a koncových efektorů používaných v plastikářském průmyslu. Zabývá se základními způsoby uchopení plastových dílů pro následnou manipulaci a možnostmi nasazení průmyslových robotů pro obsluhu vstřikovacího lisu. V praktické části jsou vypracovány dva návrhy koncového efektoru pro vykonání nezbytných úkonů pro výrobu konkrétního výlisku s následným výběrem vhodné varianty na základě okrajových podmínek. V závěru praktické části je vypracována technicko-ekonomická analýza se zhodnocením návratnosti investic a úspěšnosti provedení dílčích úkonů, které robot prostřednictvím efektoru vykonává.This bachelor thesis describes a basic overview of robotic end effectors with focus on effectors used in the plastic industry. The basic types of plastic moulding parts gripping are presented, which are suitable for subsequently handling. Possibilities of using industrial robots for operating the injection moulding machine are discussed too. In the practical part, two designs of the end effector are developed to perform the necessary tasks for the production of a specific moulding with the subsequent selection of a suitable variant based on the boundary conditions analysis. At the end of the practical part, a technical and economic analysis is developed. The return on investments and the success of the partial tasks that the robot in combination with effector performs are evaluated.

Trends in sulphur and nitrogen occult deposition across the Northern Hemisphere

The aim of my bachelor thesis is to collect data of concentrations and depositions of sulfur and nitrogen from occult precipitation, using the research of available scientific publications. Through atmospheric deposition are pollutants from air transported into other environmental spheres. It has two main components: dry (which takes place mainly by gravitational processes and its ongoing) and wet (which takes place in the presence of precipitations). Wet component consist of vertical and occult parts, representing the types of precipitations. Establishing total wet deposition encounter a problem in establishing a occult deposition. Problem is, in particular, setting of deposition flux, for which it is necessary to determinate a number of parameters. A considerable part of studies, therefore, do not examine the deposition itself, because of complexity of assessment, but examines chemical composition of fog, low clouds and rime, which is proportionally related to values of occult deposition. Most studies were examining from occult precipitation a fog, especially at higher altitudes, where due to the more frequent occurrence, significant contribute to the total atmospheric wet deposition. Occult precipitations are in longer contact with vegetation, and unlike the rainfall, are surrounded whole leaf,..

Electrodeposition of gold nanoparticles on boron doped diamond electrodes for the enhanced reduction of small organic molecules

Abstract: The performance of gold nanoparticles electrodeposited on boron doped diamond (BDD) electrodes was investigated in respect to the reduction of chloramphenicol (CAP), an antibiotic of the phenicols family. The chosen deposition protocol, three nucleation-growing pulses, shows a remarkable surface coverage, with an even distribution of average-sized gold particles (~ 50 nm), and it was proven capable of generating a three-fold increase in the CAP reduction current. A calibration plot for CAP detection was obtained in the micromolar range (535 \u3bcM) with good correlation coefficient (0.9959) and an improved sensitivity of 0.053 \u3bcA \u3bcM 12 1 mm 12 2 compared to the electrochemistry of CAP at a bare BDD electrode

Selective electrochemical determination of caffeine at a gold-chitosan nanocomposite sensor: may little change on nanocomposites synthesis affect selectivity?

A simple and selective method for the determination of caffeine also in complex matrix has been developed at a gold electrode modified with gold nanoparticles (AuNPs) synthetized in a chitosan matrix in the presence of oxalic acid. The electrochemical behaviour of caffeine at both gold bare and gold electrode modifiedwith AuNPs with different morphology was carried out in acidic medium by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). Electrochemical parameters were optimized in order to improve the electrochemical response to caffeine. The most satisfactory result, that means the higher electrochemical improvement, was obtained using a gold electrode modified with AuNPs synthetized in a chitosan matrix in the presence of oxalic acid, in aqueous solution containing HClO4 0.4 mol L−1 as supporting electrolyte. The performance of the sensor was then evaluated in terms of linearity range (2.0 × 10−6–5.0 × 10−2 mol L−1, R = 0.999), operational and storage stability, reproducibility (RSD = 3.7%), limit of detection (LOD = 1.0 × 10−6 mol L−1) and response to a series of interfering compounds as ascorbic acid, citric acid, gallic acid, caffeic acid, ferulic acid, chlorogenic acid, glucose, catechin and epicatechin. The sensor was then successfully applied to determine the caffeine content in commercial beverages and results were compared with those obtained with HPLC-PDA as an independent method and with those declared from manufacturers