| dc.contributor.advisor | Γκουμόπουλος, Χρήστος | |
| dc.contributor.author | Κολοβός, Νικόλαος | |
| dc.contributor.other | Kolovos, Nicolaos | |
| dc.coverage.spatial | Κύπρος | el_GR |
| dc.date.accessioned | 2016-03-29 | |
| dc.date.accessioned | 2016-03-30T07:36:51Z | |
| dc.date.available | 2016-03-30T07:36:51Z | |
| dc.date.copyright | 2015-08 | |
| dc.date.issued | 2016-03-30 | |
| dc.identifier.other | ΠΛΗ/2015/00191 | el_GR |
| dc.identifier.uri | http://hdl.handle.net/11128/2267 | |
| dc.description.abstract | Τα Ασύρματα Δίκτυα Αισθητήρων χρησιμοποιούνται σήμερα σε ασρκετές εφαρμογές και είναι πεδίο έρευνας που συνεχώς αναπτύσσεται. Εξ' αιτίας της ιδιαίτερότητας τους όμως, συναντούν περιορισμούς σε υπολογιστική ισχύ, αποθήκευση δεδομένων και κατανάλωση ενέργειας, που θέτουν όρια στις δυνατότητες τους. Στόχος της μεταπτυχιακης διατιβής, είναι η ακριβής μέτρηση της θερμοκρασίας απο έναν ασύρματο κόμβο αισθητήρων για εύρος απο 0 εώς 50C | el_GR |
| dc.format.extent | viii, 141 σ. εικ., 30 εκ. | el_GR |
| dc.language | gr | el_GR |
| dc.language.iso | gr | el_GR |
| dc.rights | info:eu-repo/semantics/closedAccess | el_GR |
| dc.subject | Ασύρματα δίκτυα αισθητήρων | el_GR |
| dc.subject | Wireless Sensor Networks | el_GR |
| dc.title | Διασύνδεση αισθητήρα θερμοκρασίας σε ασύρματο κόμβο για ακριβή μέτρηση θερμοκρασίας | el_GR |
| dc.type | Μεταπτυχιακή Διατριβή | el_GR |
| dc.description.translatedabstract | Wireless Sensor Networks are now used in many applications and is a research field that is constantly growing. Due to their specificity, however, one can encounter limitations in computing power, data storage and power consumption, which set limits to their capacities. The purpose of this Master’s thesis is the precise measurement of the temperature by a wireless sensor node ranging from 0 to 50°C.
To achieve the target, a wireless network was implemented consisting of a wireless sensor node, a coordinating node and a user management environment. To keep costs low, the wireless nodes based on the development platform Arduino and wireless communication module nRF24L01 +.
High-resolution measurements from the wireless node were achieved as a result of the use of sensors NTC thermistor and a high resolution Analog to Digital Converter (ADC).
Using sensors NTC thermistor and high resolution Analog to Digital Converter (ADC), enabled making high-resolution measurements from the wireless node. Furthermore to reduce the phenomenon of thermistor self-heating, the minimum trip current was applied and only for such time as is necessary to take a measurement.
The calibration of the system was done by dividing the measuring range into five sections and taking ten samples from each one. From these samples were computed the fixed values of the function which models the measurement circuitry.
In the evaluation of the system which was done by reference temperatures of high precision thermistor, it was found that the calibrated circuit of the wireless node can follow the reference temperatures with error less than ± 0.05 ° C and under appropriate circumstances, this error can be reduced even more. | el_GR |
| dc.format.type | pdf | el_GR |
