The thesis addresses the development of an automated system for measuring and regulating the quality of swimming pool water.
The key parameters here are pH and oxidation-reduction potential (ORP), which need to be measured and regulated by adding two chemicals.
Two measuring probes were selected to measure these parameters; two chemical container weight sensors were also added.
All sesnsors are connected to a microcontroller, which also controls two pumps for adding chemicals.
A custom printed circuit board was designed and manufactured for the microcontroller and associated connection components.
In addition to capturing measurements and controlling the pumps, the microcontroller also communicates with the PLC controller using the open IEX-2 protocol, which is based on the low-level industrial CAN protocol.
The PLC controller contains the main control program, which regulates the quality of the pool water by measuring and controlling the pumps for adding chemicals.
The PLC controller was then connected to a computer, which hosts the visualization user interface; this displays the status of the system and allows easy control of the system.
The system was tested on a smaller amount of water and found to work well while providing user-friendly control.
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