This master's thesis presents the development of the measuring system for measuring the amount of fuel in an aeroplane. Thesis' main aim is to develop a reliable measuring system, which would – apart from a precise detection of the amount of fuel – offer an additional level of protection against unwanted contaminants in the fuel.
The introductory part presents the problematic that initiated the search for the solution of the problem in question. Further, the possible ways of measuring the amount of fuel are examined. The principle of operation of a certain method is described, as well as the advantages and weaknesses of individual approaches for measuring the level of fuel in an ultra light aeroplane. The capacitive method of fuel level detection was used.
The third chapter briefly presents the prospective component parts of the measuring system. The purpose is to introduce the role of the upcoming chapters to the reader.
Later-on we present the theoretical background of the CAN bus used in the thesis. Firstly, the historical aspect is presented. The composition of the packets and the basis of the functioning of the communication on the physical level subsequently follow.
A short discussion of switch mode power supplies follows with the emphasis on the step-down converter. We briefly discuss the unsuitability of the basic building blocks of electronic circuits.
The main part of the thesis encompasses the design and realisation of the measuring system. The individual compounds of the machine and their realisation on the printed circuit board are discussed. System testing and results evaluation follow.
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