Performance analysis of passive UHF RFID sensor tags on various materials
Vincent, Anita (2015)
2015
Master's Degree Programme in Information Technology
Tieto- ja sähkötekniikan tiedekunta - Faculty of Computing and Electrical Engineering
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Hyväksymispäivämäärä
2015-11-04
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tty-201510211681
https://urn.fi/URN:NBN:fi:tty-201510211681
Tiivistelmä
RFID (Radio Frequency Identification Technology), came into existence during the Second World War, when the military used this technology for IFF (Identification of Friend or Foe) purposes. In recent years RFID is used extensively. Wal-Mart the multinational retail enterprise have invested millions of dollars to replace their bar code system with RFID technology.
The main advantage of using an RFID system is that it is simple, inexpensive, maintenance free, flexible and portable. The entire system consists of a reader, tag, IC, antennas and a controller. There can be numerous readers present in a particular area, and these readers network via a controller.
However, it is vital to test the RFID system to ensure it performs optimally. The tags can be placed virtually on any material, but it is necessary to analyze how the tag will perform on the different materials under various environmental conditions. It should be possible for the tag to provide accurate results with changing environmental conditions, for instance, in the presence of moisture. Sensor tags provide a solution to this problem. Sensor tag is a type of RFID tag which can sense moisture, temperature or pressure levels and adjust the readings accordingly. Sensor code and RSSI code values are important factors determining the performance of the sensor tag.
This thesis mainly focuses on the analysis of the performance of a sensor tag known as sensor dogbone tag on different materials under different environmental conditions using a reader (NordicID), which is specifically used to read sensor tags. A comparative study is made on the above conditions to determine the most suited position for the tag to be placed, in order to obtain results. The tag is placed on reference materials at constant read range and measurements are taken using a NordicID reader under various instances like, sunny outdoors, presence of moisture, embedded inside materials, enclosed inside a cardboard box etc. This thesis also offers an introduction to the RFID technology, its components and the communication of the RFID network.
The main advantage of using an RFID system is that it is simple, inexpensive, maintenance free, flexible and portable. The entire system consists of a reader, tag, IC, antennas and a controller. There can be numerous readers present in a particular area, and these readers network via a controller.
However, it is vital to test the RFID system to ensure it performs optimally. The tags can be placed virtually on any material, but it is necessary to analyze how the tag will perform on the different materials under various environmental conditions. It should be possible for the tag to provide accurate results with changing environmental conditions, for instance, in the presence of moisture. Sensor tags provide a solution to this problem. Sensor tag is a type of RFID tag which can sense moisture, temperature or pressure levels and adjust the readings accordingly. Sensor code and RSSI code values are important factors determining the performance of the sensor tag.
This thesis mainly focuses on the analysis of the performance of a sensor tag known as sensor dogbone tag on different materials under different environmental conditions using a reader (NordicID), which is specifically used to read sensor tags. A comparative study is made on the above conditions to determine the most suited position for the tag to be placed, in order to obtain results. The tag is placed on reference materials at constant read range and measurements are taken using a NordicID reader under various instances like, sunny outdoors, presence of moisture, embedded inside materials, enclosed inside a cardboard box etc. This thesis also offers an introduction to the RFID technology, its components and the communication of the RFID network.