Ημερολόγιο Εκδηλώσεων

Περιγραφή:
ΠΟΛΥΤΕΧΝΕΙΟ ΚΡΗΤΗΣ Σχολή Ηλεκτρονικών Μηχανικών και Μηχανικών Υπολογιστών Πρόγραμμα Μεταπτυχιακών Σπουδών ΠΑΡΟΥΣΙΑΣΗ ΜΕΤΑΠΤΥΧΙΑΚΗΣ ΔΙΑΤΡΙΒΗΣ ΛΟΪΖΟΥ ΚΩΝΣΤΑΝΤΙΝΟΥ με θέμα Αισθητήρες χαμηλού κόστους για την επιτήρηση της στάθμης νερού σε δεξαμενές αποθήκευσης μεγάλης κλίμακας Low cost sensors for water level monitoring in large scale storage tanks Εξεταστική Επιτροπή Επίκουρος Καθηγητής Ευτύχιος Κουτρούλης (επιβλέπων) Αναπληρωτής Καθηγητής Άγγελος Μπλέτσας Αναπληρωτής Καθηγητής Αντώνιος Δεληγιαννάκης Abstract The implementation of water management techniques in various environmental applications requires the measurement of the level of water stored in artificial storage tanks (e.g. in cities, communities etc.) or natural reservoirs. In this thesis, the design of two low cost water level sensors is presented, which are based on the capacitive and Time Domain Reflectometry (TDR) principles, respectively. The proposed sensors are comprised of sensing probes constructed using low cost and widely available multilayer and stainless steel tubes. Signal conditioning electronic circuits have also been designed for both of these sensors, in order to interface the acquired water-level measurements to a digital data-acquisition device through an I2C communication bus. The manufacturing cost and power consumption of the proposed sensors are relatively low, enabling their incorporation in Wireless Sensor Networks, which are power supplied by Renewable Energy Sources. The performance of the proposed sensors has been evaluated experimentally in a city scale network of drinking-water storage tanks. The experimental results verify that the proposed sensors achieve equivalent accuracy with a commercially-available ultrasound water-level sensor, which, however, is of significantly higher cost.