中文摘要天然气在人们的日常生活中做出了非常大的贡献，然而当它在空气中的浓度达到一定范围时可能引起自燃甚至爆炸，这样就会造成很大的危险。甚至会危害到人们的生命以及财产的安全。本文介绍了一种基于 AT89C51 单片机和气敏传感器进行巡环检测天然气罐浓度的装置。该设计包括监测系统的组成、工作原理及硬件、软件设计的方法。本系统不仅可实现对天然气浓度进行实时监测而且当浓度达到一定范围时会产生相应的预警，还具有超出给定浓度报警的功能，为预防和减小火灾损失提供了有力的科学手段。本文采纳了气敏传感器，气敏传感器是能够感知环境中某种气体及其浓度的一种敏感器件，它将气体成分、浓度等有关的信息转换成为电压信号，从而可以进行检测、监控、报警；还可以通过接口电路与计算机组成自动检测、控制和报警系统。目前，人们对气敏传感器的测试方法主要停留在用人工手动的方式来进行操作，开发出一种有用高效的智能化传感器测试装置是非常的必要的。本文根据人们的需要设计出了一种高效有用的天然气实时巡测装置。关键词 ：天然气；气敏传感器；报警；AT89C51；Title:Concentration of natural gas more patrol unitAbstractNatural gas in people's daily life has made great contributions, but when it is in the air when the concentration reaches a certain range may cause spontaneous combustion or explosion, which would result in great danger. Even endanger people's lives and property.This paper describes a gas sensor based on AT89C51 microcontroller and gas tank concentration loop detection device. The design includes monitoring system, working principle and the hardware and software design methods. The system not only enables real-time monitoring of gas concentration, and when the concentration reaches a certain range will have the appropriate warning, but also has exceeded the alarm function of a given concentration, to prevent and reduce fire losses provide a strong scientific means.In this paper, the gas sensors, gas sensors is the ability to sense the environment and the concentration of certa...
