The Design, by Physical Topology Optimizing, of a Passive UHF RFID Identification System: Suitable for Applications with Various Constraints

Abstract

RFID technology is booming. It catches the attention of several researchers. This technology uses the radio wave to identify objects on which an RFID tag is placed. RFID has a lot of advantages, but it also has limitations. Its limits are its sensitivity to liquids, metals and speed.We design an objects identification system by radio frequency that works in different RFID technology application environments, based on passive UHF RFID technology and through the physical topology optimization in real time too. This system is also adapted to various constraints, in order to solve overcome difficulties, related to various applications, at once, and operates, without any problem, in different fields.We use the simulated annealing algorithm to find the optimal physical topology that has the highest average reading rate. RFID antennas are installed on brackets, attached to a tripod system by servo motors. These servo motors are controlled by the middleware, where the simulated annealing optimization algorithm is already implemented, to vary the angles of the detection connectors in an automated way, in order to find the optimal topology. So the optimization process will be guided by an optimization algorithm and not by trial and error processes. Tripod mechanical systems are movable media for antennas to play on XYZ dimensions too.The design of the mechanical system and the choice of materials were made. The first results, such as the identity of each detected object and the identity of each antenna that will detect an object, are here. Following reached results will be shared in several next publications.