根據生產線特定需要，介紹了一種基于ARM的RFID超高頻讀寫器系統，使用LPC2138
微控制器和射頻收發芯片ADF7020 作為讀寫器的核心器件，并使用RS-485 總線網絡實現
了各個讀寫器與后臺服務器的通信。文中給出了系統軟硬件設計方案，對其實現方法及其關鍵技術進行了研究。實驗結果表明該系統工作穩定，傳輸數據準確，具有一定的應用價值。
關鍵詞：讀寫器；RFID；嵌入式系統；RS-485 總線

Design of a UHF reader in RFID production line system HU Zhi-xi (Changzhou Institute of Technology, Jiangsu Changzhou 213002, china) Abstrac：The paper introduced a system of UHF RFID reader based on ARM.The system selects the LPC2138 Microcontroller as the control core,ADF7020 as wireless receiving/dispatch chip,RS485 as communication bus. Its software and hardware design scheme,key technologies and implementation were presented also.It has been proved by tests that the system is good at practice in stablility,and will be of great applied value.
Key words：reader;RFID; Embedded System;RS-485 bus