基于无线传感器网络及GPRS的水质监测系统设计

The design of water quality monitoring system based on wireless sensor networks and GPRS

摘要:

提出了一种基于ZigBee无线传感器网络和GPRS技术的多参数远程实时水质监测系统。无线传感器网络以CC2430通信模块为核心。传感器节点采集到的数据经路由节点汇总至协调器节点,通过GPRS模块及时远传至监控中心。设计信号调理电路,将传感器电极输出的微弱电信号进行放大、滤波。采用时间同步机制实现网络节点的同步唤醒,大幅提高网络的稳定性。对系统进行了多天连续测试。通信距离为100米时,网络的平均丢包率低于1%。pH值、溶氧度的平均相对偏差低于1%。测试结果表明,系统具有灵活、实时性好、准确性高、稳定可靠等优点,具有很强的实用价值。

Abstract:

A remote real-time multi-parameter water quality monitoring system is proposed based on ZigBee wireless sensor network and GPRS technology. The CC2430 communication module is the core of the wireless sensor network. The data collected by the sensor nodes are sent to the coordinator node by the routing nodes, which are transmitted to the monitoring center by GPRS module in-timely. The signal conditioning circuits are designed, by which the weak electrical signals from the sensor electrodes are amplified and filtered. The time synchronization mechanism is utilized to wake up the nodes in the network in the same time, which significantly improves the stability of the network. The system has been continuously tested for several days. The average network packet loss rate is less than 1% within the communication distance of 100-meter. The average relative deviation of the pH value and dissolved oxygen concentration are less than 1%. The test results illustrate that the system has the advantages of flexibility, good real-time performance, high accuracy, stableness and reliability, and has a strong practical value.