The diploma thesis presents the process of upgrading/modifying the didactic hydraulic press, which currently uses didactic control components to control the hydraulic valve of the system. In the diploma, instead of didactic control components or a PLK controller, we used the Raspberry Pi microsurbist, which is more useful in terms of flexibility and the possibility of developing different control methods, different graphical user interfaces and the production of displays of measured quantities.
We discuss in more detail the control of the switch valve with the control signal 24 V, which allows the hydraulic cylinder to be moved in both directions. To measure pressure during the process, we used a pressure gauge that measures the pressure in the upper chamber of the hydraulic cylinder to calculate the push force of the cylinder. The hydraulic device control program is written in Python, we have created an appropriate graphical interface with buttons for single-cyclic and cyclic execution of the process. The graphical user interface also contains a pressure display. Finally, the hydraulic system was tested and checked in terms of the suitability of the micro-control system and the display of measured quantities.
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