水质监测传感器数据采集节点的设计和实现

Design and implementation of sensor data acquisition node for water monitoring

针对水质监测无线传感器网络中实时性和多参数监测的要求,设计并实现用于水质监测的传感器数据采集节点.根据水质传感器输出信号的特点,提出新型的信号调理及检测通路复用的方式,复用的信号通路由自主研发的传感器信号调理电路芯片实现.在软件上设计循环检测中断的方式,结合3G移动网络通信技术,实现了水质监测多参数数据的实时上传.测试结果表明,通过与DO100以及标准溶液进行比较测试,节点能够准确采集温度、DO(溶解氧浓度)、pH(酸碱度)、ORP(氧化还原电位)、EC(电导率)5种水质参数数据,并能够实时上传监测结果至云服务器.

A sensor data acquisition node was designed and implemented for water monitoring,which aimed at fulfilling the real-time and multiparameter requirements in the water monitoring wireless sensor network.A novel signal conditioning and detecting path reuse method was proposed and the reused signal path was implemented by the integrated sensor signal conditioning chip according to the output signal characteristics of water quality sensors.A cycle detecting with interruption method was designed in the software and the multiparameter data of water monitoring was uploaded in real time through the 3rd generation telecommunication.The experimental results were compared with that of DO100 and some standard solutions.The node can accurately acquire the data of five water quality parameters,i.e.,temperature,dissolved oxygen,potential of hydrogen,oxidation-reduction potential,and electrical conductivity.The monitoring results were uploaded to Cloud Server in real time.