Πλοήγηση ανά Συγγραφέας "Diamantakis, Ioannis"

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    Air quality evaluation using low-cost portable sensor node in indoor environment
    (ΕΛΜΕΠΑ, Σχολή Μηχανικών (ΣΜΗΧ), ΠΜΣ Μηχανικών Πληροφορικής, 2024-04-18) Diamantakis, Ioannis; Διαμαντάκης, Ιωάννης; Panagiotakis, Spyridon; Παναγιωτάκης, Σπυρίδων
    Air quality in large areas and especially in cities has been an issue of concern to the state and residents for decades, with the aim of ascertaining the situation and improving any problems that may arise, having developed common standards (AQI), surveillance and recording systems for decades. On the other hand, air quality in the places where we live, work, study, is not a key priority nor are there commonly accepted indicators by which the air of an enclosed space can be characterized as clean or harmful. Also, it is a fact that enclosed spaces differ significantly in air quality even, depending on their use even if they are very close. This creates the need for a large number of measuring stations and necessarily cheap ones to cover all spaces. In this thesis, a record is made of the methods of air measurement, the elements they take into account and a method of assessing indoor air quality (IAQ) is proposed, taking into account the burden caused by human presence. In addition, a device that uses the ESP32 microcontroller and a set of low cost, high accuracy sensors is designed, developed and tested. Its main purpose is to sense and send raw data of air metrics, using MQTT protocol, to a timeseries database for further processing. This device could be used to create a fog computing/sensor group, which could extend in a house or a larger building. It also proposes and develops a way of central monitoring (Grafana) of measurement stations and proposes a method of calculating the air quality index, with a centralized system and the use of machine learning algorithms like K-NN, that calculate the IAQ index of each station thus the room that is placed in, informing the inhabitants. The proposal is interesting and shows prospects for implementation. In the future, it could be expanded by adding automatic positioning of a measuring station, immediate suggestions for improving air quality depending on the pollutant that is increased, or controlling devices that could improve air quality.