Abstract
To address the serious conflict and poor reliability issues in existing radio-frequency identification (RFID) systems, a complete set of remote wireless noncontact attendance system was designed using a 2.4 GHz active RFID system as the terminal reading device for recording employee attendance information. Combined with a wireless network architecture provided by a wireless sensor network, the system wirelessly transmits attendance information to a remote computer control system, thereby effectively improving the cumbersome wiring, poor mobility, and expansibility faults of the cable-contacted attendance system used in the Rail Transportation industry. Consequently, production safety and personnel attendance management become more convenient. The client management system communicates using LabVIEW development tools with the SQL SERVER 2008 database to achieve attendance management functions. To address the electronic tag collision problem in an active RFID system, an improved framed-slotted ALOHA anti-collision algorithm was proposed by combining the original algorithm with dynamic grouping ideas, thereby improving RFID system performance and efficiency.
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