基于线性回归模型的无线水质参数监控预警终端设计

Wireless Water Quality Parameters Monitoring and Early Warning Terminal Design Based on Linear Regression Model

设计了无线水质参数监预警控终端,实现对水温、溶氧量、pH值等参数的实时在线监测,对水质参数的在线采集、本地存储、显示、远程传输和预警报警功能;采用ATmega128A单片机为核心控制器,电化学型传感器为采样模块,GPRS网络进行远程通信;通过休眠、部分模块断电等方式降低能耗,基于一元线性回归模型设计了水质参数预警机制,预警估计值与实际值偏差在1个单位以内;实验测试结果表明监测精度在满量程的3%以内。

Aiming at the real--time monitoring of water qualities, an wireless water quality monitoring and early warning terminal is de signed, it can monitor water temperature, dissolved oxygen, pH, and other parameters, and has local storage, display, remote transmission and Warning alarm function. It use ATmega128A microcontroller as the core controller, and use electrochemical sensors as the sampling module, and remote communication by GPRS network. Dormancy and some power outages were used to saving energy. A linear regression model were used to design early warning mechanism, the deviation between estimate value and real value is less than 1 unit. Experimental re- sults show that the monitoring accuracy in less than 3% of full scale.