面向电力智能表计资产管理的UHF RFID读写器研究

面向电力智能表计资产管理,研发了新型的UHF RFID读写器。研究改进了定向耦合器法,以解决读写器载波泄漏问题;提出了电力智能表计专用读写器FH-Q选择防碰撞算法。利用端口失配效应提高定向耦合器隔离度,并结合自适应调谐网络降低天线反射功率的方法,减少泄漏载波,提高读取效率;FH-Q选择算法在对常规的DFSA防碰撞算法进行优化的基础上,利用频繁跳频的方法防止干扰,解决了读写器在电能表复杂金属电磁环境中的多标签碰撞问题和快速批量识别问题。

UHF RFID Reader for Asset Management of Electric Intelligent Meters

A novel UHF RFID(Ultrahigh Frequency Radio Frequency Identification) reader is developed for the asset management of electric intelligent meters.An improved directional coupler method is considered to solve the problem of reader carrier leakage,and the FH-Q select(Frequency Hopping based Q select) anti-collision algorithm is proposed.The isolation of directional coupler is increased by port mismatch and the power of antenna reflector is reduced by adaptive network in order to decrease the carrier leakage and improve reading efficiency.The interference is prevented by frequency hopping in FH-Q select algorithm on the basis of optimizing the general DFSA(Dynamic Frame Slotted ALOHA) so as to solve the problem of multi-label collisions and quick batch identification under the complex electromagnetic environment.