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Řízení vývěvy dojicího stroje frekvenčním měničem
Šimoník, Jiří
The diploma thesis is focused on the issue of controlling the vacuum pump of the milking machine with the help of a frequency converter. The theoretical part deals with stables for dairy cows. The principles of welfare and housing of dairy cows, as well as other types of cattle, are briefly described here. Emphasis is placed on the description of individual types of milking parlours and their advantages and disadvantages are highlighted. The main part of the literary research of the diploma thesis is devoted to machine milking. The principle of machine milking, vacuum regulation and individual types of vacuum pumps are described in this section. Stress is also put on the drive of vacuum cleaners, namely asynchronous motors. In the practical part, an uncontrolled asynchronous motor is compared with a controlled asynchronous motor using a frequency converter during milking. In this part of the thesis, both laboratory measurements and measurements in the company are performed. On the basis of the obtained values, the technical and economic parameters of the individual methods of controlling the asynchronous motor are subsequently evaluated both in the laboratory and in the field.
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Technologické systémy získávání a ošetřování mléka dojnic
BARTŮŠKOVÁ, Markéta
The bachelor thesis used a method of the library research for creating an outline dealing with an issue of milk production and dealing with milk. The attention was focused especially on individual kinds of milking parlours, milking equipment and its sanitation, milking process itself, ways of treating and keeping milk after milking. Different kinds of milking parlours were compared and a summarising evaluation was performed on the basis of this comparison. It was revealed that for the breeders, robotic milking technology is useful because of a limited number of the labour force.
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Porovnání vybraných ukazatelů welfare dojnic dojených v dojicím automatu a na rybinové dojírně
KOUTEK, Martin
The aim of this diploma thesis was to obtain and formulate the knowledge about the process of milking and the activity of dairy cows 30 minutes after milking in the milking parlour with a robot and in the herringbone milking parlour. Three ethological observations took place in three seasons. The observation on the farm with a milking robot took 24 hours continuously. The observation on the farm with a milking parlour lasted for the duration of milking and subsequent observation of the last group of dairy cows. In total, there were evaluated 452 successful milkings on the farm with the robot and 112 successful milkings on the farm with the milking parlour. Crosses of Czech Fleckvieh Breed and red Holstein Breed in the same ratio were observed during the monitoring. Parameters during milking and ethological performance, such as drinking, feed intake and lying down, in the duration of 30 minutes after milking were monitored. The instructions of the thesis are based on the project NAZV - QJ1210144 and NAZV QJ1530058.
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