2014年公需科目考试-网络安全建设与网络社会治理试题库 免费包过.doc

摘要

空气品质对人的影响至关重要,利用传感器检测空气质量是当今流行的一种方法,本文介绍了传感器在空气质量检测方面的原理应用及监控系统的网络设计。
本系统采用无线传感器网络来实现数据的采集与发送。无线传感器网络是由部署在监测区域内大量的廉价微型传感器节点组成,通过无线通信方式形成一个多跳的自组织的网络系统,其目的是协作地感知、采集和处理网络覆盖区域中感知对象的信息,并发送给观察者。
2430无线通信模块、温湿度传感器DHT90、空气质量传感器QS-01、电源模块构建无线传感器网络,通过RS-232串口和监控中心通信,使用软件开发平台IAR Embedded Workbench开发ZigBee协议栈,基于ZigBee的无线网络技术以低功耗、低成本、低复杂度等特点受到越来越多企业和个人的青睐。空气质量监测系统特别适合于数据吞吐量小、网络建设投资少、网络安全要求较高、不便频繁更换电池或充电的场合。预计将在消费类电子设备、家庭智能化、工控、医用设备控制、农业自动化等领域获得广泛应用,利用ZigBee技术完成传感器节点和汇聚节点的应用程序,最终能够实现空气质量的监测。
关键字:2430;DTH90;zigbee技术;空气质量检测
ABSTRACT
Air quality impact on people is very important, using sensors to detect air quality is now a popular method, this paper introduces the sensor in air quality testing principle, analyzes the advantages and disadvantages of gas sensor, and gas sensor development trend and prospects.
The system uses wireless works to achieve data’s collection and transmission. Wireless works posed of a large number of low-cost micro-sensor nodes which are deployed in the monitoring region, uses munication means to form a multi-hop's work, with the aim of perception, collection and processing of perceived target information in work coverage region, and send them to observers.
This system 2430 munication module ,temperature and humidity sensor DHT90, air quality sensor QS-01,power module to build wireless works, and uses RS-232 serial port municate with monitoring center .Use the software development platform IAR Embedded Workbench to develop ZigBee protocol stack. Based on the ZigBee working by low characteristics and so on power loss, low cost, plexity receives more and more many enterprises and individual ZigBee technology suits specially in the data volume of goods handled small, work construction invests few, work security request is high, inconvenient replaces the battery or the charge situation estimate in the expense class electronic installation, the family intellectualization, the labor will control, medical domains and so on