基于CC1100的ZigBee无线抄表系统的节点设计.pdfVIP

学兔兔 总第47卷 第530期 电测与仪表 Vo1．47 NO．530 2010年 第O2期 Electrical neasurement InstrumentatiOil Feb．2010 基于CC 1 1 00的ZigBee无线抄表系统的节点设计术 曹青松，徐鹏，周继惠 (华东交通大学载运工具与装备教育部重点实验室，南昌330013) 摘要：无线抄表系统中的抄表节点在为用户提供实时、准确的信息方面具有重要意义。为降低节点功耗以及在 发射功率不变前提下增大其通信距离，本文设计了一种新型的无线抄表节点。该节点采用低功耗的Atmega88 单片机作为控制处理中心，无线收发模块采用2．4 GHz免费频段、低电压供电的CC1100，用休眠机制以及简化 的CSMA／CA协议来降低成本与功耗，最终实现用户数据的实时采集与传输。模拟测试结果表明：射频发送功率 为18dBmW时，在空旷地域实测两相邻节点最大有效传输距离可达200m。 关键词：无线抄表节点；ZigBee；CCI100；Atmega88 中图分类号：TP212 文献标识码：B 文章编号：1001—1890(2010)02—0017—04 Design of ZigBee Wireless Meter Reading Node Based on CC l l00 CAO Qing—song，XU Peng，ZHOU Ji—hui (Key Laboratory of Ministry of Education for Conveyance and Equipment，East China Jiaotong University，Nanchang 330013，China) Abstract：The node in the wireless meter reading system is significant to provide with real—time，accurate information．A novel kind of wireless meier reading node is designed in this paper in order to reduce node power as well as increase its signal distance under the premise of the same transmit power．This node uses low-power microcontroller Atmega88 as the control processing center and CC 1 100 which have advantages of free 2．4GHz frequency band and low——voltage power supply as wireless transceiver．Dormancy mechanisms and simplified CSMA|CA protocol are adopted to reduce the cost and power consumption．The user’S data are collected and transmitted real-time ultimately．Simulation testing results indicate that the transmission distance of two adjacent nodes can achieve 200 meters when RF emission power adjusts to 18dBmW． Key words：wireless meter reading node，ZigBee，CC 1 100，Atmega88 0 引 言