根據(jù)生產(chǎn)線特定需要，介紹了一種基于ARM的RFID超高頻讀寫器系統(tǒng)，使用LPC2138
微控制器和射頻收發(fā)芯片ADF7020 作為讀寫器的核心器件，并使用RS-485 總線網(wǎng)絡(luò)實(shí)現(xiàn)
了各個(gè)讀寫器與后臺(tái)服務(wù)器的通信。文中給出了系統(tǒng)軟硬件設(shè)計(jì)方案，對(duì)其實(shí)現(xiàn)方法及其關(guān)鍵技術(shù)進(jìn)行了研究。實(shí)驗(yàn)結(jié)果表明該系統(tǒng)工作穩(wěn)定，傳輸數(shù)據(jù)準(zhǔn)確，具有一定的應(yīng)用價(jià)值。
關(guān)鍵詞：讀寫器；RFID；嵌入式系統(tǒng)；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