文档介绍：目录
摘要 2
关键词 2
引言 3
1 系统方案设计 3
设计任务.. ..3
方案论证与选择 3
调制解调方式 3
载波频率 3
功放的选择 4
单片机选型 4
系统方案框图 4
2 理论分析计算与电路设计 5
发射部分 5
耦合天线 5
发射机 6
接收部分 7
3839a接收机 7
解调信号处理 8
传感器 8
光电传感器 8
温度传感器 8
9
信号处理 9
终端: 9
探测节点 10
3 系统软件设计 10
11
通信协议 11
程序流程图 12
4、测试方法和测试结果 12
5、结束语 13
参考文献 14
附录 15
无线环境监测模拟装置
摘要:本系统基于 ASK (Amplitude-Shift Keying):幅移键控技术,监测终端和探测节点各含一套无线收发电路,实现了对周边温度和光照信息的探测。其中监测终端可以分别与各探测节点直接通信,并能显示当前能够通信的探测节点编号及其探测到的环境温度和光照信息。本系统探测节点采用线圈耦合接收信号, 实现了每个探测节点信息的转发功能,实现中继。探测节点同时采用AT89S52单片机处理数据,探测节点温度检测采用ds18b20温度传感器,光照检测采用普通光敏二极管。本电路的基本原理是:温度传感器、光敏二极管检测到温度、光照信号后送到单片机处理,处理后的信号再通过单片机的串行发送端口送到ASK调制电路进行调制,调制后的信号再通过线圈发送出去,监测终端通过线圈耦合接收到信号进行放大解调,再给终端的单片机处理,再通过1602液晶显示屏显示。本系统具有电路简单,传输距离远,低功耗等特点。
关键词:线圈耦合无线环境监测 ASK
Wireless environment monitoring device
The YuShuiQing guide teacher weiwu
his system based on the itinerary Shift Keying Amplitude (of) : - moved Keying technology, monitoring terminal and detecting node containing the wireless transceiver circuit, a set of surrounding temperature and light information detection. Which can be measured respectively, and the terminal into the detecting node, and can be munication can display the current detection munication Numbers and detect nodes ambient temperature and light information. This system in detecting node using coil coupling, each receiving signal detection node of the information transmitted function, relay. Detecting node using AT89S52 SCM processing data, the node temperature detection using temperature sensor ds18b20, using ordinary light photosensitive diode. The basic principle of this circuit is: temperature sensor, photosensitive diode detected temperature, light signals to chip after treatment, the signal sent by MCU serial port to ASK modulation circuit modulation, modulated by sending out again, monitoring terminal coil winding coupling to receive signals through amp