基于ZigBee技术的无线气体成分检测传感网络设计

Wireless gas component analysis network based on ZigBee

为了能够对环境中的目标气体浓度进行准确的远程监测本文设计了一款基于ZigBee技术和近红外吸收光谱技术,设计并开发出了一款远程无线气体成分检测传感网络系统。该系统由前端的近红外激光发射模块、探测器模块、后端数据处理模块构成及负责远程通讯的ZigBee模块构成。前端部分主要负责对数据的采集,后端部分则主要负责对数据的分析,ZigBee模块则主要负责两者间的无线通信。ZigBee模块的使用,一方面可以更方便一个后端装置与多个前端装置进行通讯并对其所采集到的数据进行接收和处理,;另一方面也可以将前端所检测的环境和后端软件使用者所处环境的隔离,以适应诸如化工厂车间等恶劣环境的检测需求。实际测试效果表明,在没有中继节点的情况下,该系统的ZigBee无线通讯有效传输距离可以达到30m以上,能够满足大部分情况下要求.而且该距离还可以通过中继节点的加入进行进一步的扩展。此外,测试中后端节点可以同时对3个前端装置采集到的数据进行处理,并且具有较高的检测精度。

A gas component analysis network based on ZigBee and near-infrared absorption spectrum method was designed and accomplished in this paper in order to detect the targets gses accurately in remote gaseous environment. This system contained three parts: front end which was consisted of near infrared laser emission module and detector module,after end which was the data processing module,and the ZigBee module. The front end was responsible for data collection,the after end was responsible for data analysis. and the ZigBee module was responsible for the wireless communication between the front end and the after end. The use of ZigBee module not only made it easier for one after end to communication with multiple front ends and analysis their collected data,but also made it possible to insulate the environment of the front ends and the after end so that the system could be used in harsh environment such as sorkshops of the chemical factory. After experimental tests,it shows that the ZigBee wireless transmitting distancec could reach 30 m without using of relay nodes and could meet requirements in most cases. And the distance could be further extended by using relay nodes. Besides,the after end could analysis the data collected by three front end at the same time with high detection accuracy.