基于半双工无线通信的环境监测系统设计

文章提出了一种基于半双工通信的无线环境监测系统的设计方案，实现了对周边温度和光照信息的准确探测。系统主要由监测终端电路、无线收发电路以及传感探测电路构成。控制芯片采用8位高性能、低功耗AVR单片机（ATmega48）进行人机操作界面控制以及对信息数据的采集。无线收发电路采用ASK方式对数字信号进行全数字式调制解调，实现了收发两端的半双工无线通信。本系统结构设计合理，运行稳定．具有传输效率高、功耗低、探测距离远等特点。

Design of the Wireless Environmental Monitor Based on Semi duplex Communication

The paper puts torward a design scheme of the wireless enviromnental monitor based on semi duplex communication and achieves the target that is to gather the information of the temperature, and light exactly. The system contains three basilica parts of circle： monitoring terminal,the wireless transmission and sensor test. The MCU with high capability and low power deals with tasks like display and control for the human interface and the information collected around. In this design, we choose ASK as the way for digital modulation and demodulation and fulfill semi duplex communication between the receiving and the sending .The configuration of this system is reasonable. And it owns many specialties, such as the efficiency of transmission is high, lower power and the distance of monitoring is further.