473. JaneczekK
نویسندگان
چکیده
Storage and transportation conditions of goods need to be often controlled because of their sensitivity for elevated temperature or other environmental factors (like for example humidity). Nowadays, such a control is carried out mostly using indicators or complicated and expensive sensors. The last one contains batteries and other electronic components and performs a function of a recorder. Because of this, such sensors are not flexible. On the other hand, indicators can be bended multiple times without any damage in their structure but their state is read optically. In this study, a flexible temperature sensor read wirelessly integrated with RFID tag was described. It was fabricated with silver pastes applied by screen printing techniques on low cost flexible substrate. Antenna of a RFID tag worked in UHF frequency range in order to provide a read distance up to 1m. Its parameters were evaluated by reflection coefficient measurements and compared with simulation results. Assembly of a RFID chip was carried out with a conductive adhesive. Properties of elaborated temperature sensor were investigated depending on applied materials and a level of a testing environment temperature.
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