Abstract
Radio Frequency Identification (RFID) and wireless sensor networks are wireless technologies that rapidly emerge and show great potential. Combining RFID and wireless sensor networks provides a cost-efficient way to expand the RFID system's range and to enable an RFID system in areas without a network infrastructure. These two technologies are employed to build a wireless localization system in a children's theme park. The main purpose of this child localization system is to track and locate children within a certain range near some landmarks in the park. The design experience in this project can be exported to other applications such as object tracking and surveillance.
Highlights
Radio Frequency Identification (RFID) technology has emerged to be a popular replacement for the Universal Product Code (UPC) barcode system in many industries
There are three components that need to be tested in our system prototype: the motion detection sensor, the RFID system, and the wireless sensor network
If the RFID readers scan for nearby tags and report 12 bytes for RFID tag unique identity (UID), 8 bytes for timestamp, and 4 bits for statue ID, and if the readers need to update the detection of 100 kids every second, the system data rate is about 16.4 kbps, which is well below the RF rate (38.4 kbps) of the sensor mote
Summary
Radio Frequency Identification (RFID) technology has emerged to be a popular replacement for the Universal Product Code (UPC) barcode system in many industries. A wireless sensor network consists of many spatially distributed devices called motes. Attaching the RFID readers enables the motes to monitor a wider range of objects than with traditional sensors. The wireless sensor network can expand the RFID system’s range and enable an RFID system in areas where a network infrastructure (e.g., Internet) does not exist In this undergraduate student design project, we employ both RFID and wireless sensor network technologies to build a wireless localization system in a children’s theme park. Our system design supports real-time detection of RFID tags and remote data collection through the underlying wireless sensor network. These capabilities are implemented with very low power consumption.
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