多点红外火灾探测系统设计-毕业论文（科学研究报告）.doc

毕 业 论 文 （科 学 研 究 报 告） 题 目 多点红外火灾探测系统设计 院(系)别 专 业 级 别 学 号 姓 名 指导老师 大 学 教 务 处 2012年6月 摘 要 本设计利用对射反射式红外传感器对受限空间内火灾进行探测，分析火源发展状态与红外传感器输出之间的关系，在此基础上设计出多点红外火灾探测软硬件系统。系统围绕flame-1000火焰传感器和AT89C51单片机进行设计。火焰传感器送出的模拟信号经过滤波和放大后输入ADC0809，然后转化为数字量，经过单片机处理后，将各传感器的状态显示在12864液晶显示屏上，若检测到火源，则报警。 主要完成了系统原理图以及硬件电路板的绘制，并进行了一定的软件设计，多点红外火灾探测系统大大缩短了火灾早期报警时间、提高了准确度，火灾自动报警系统已经形成了探测不同火灾的现代消防自动化系统，使各类工业建筑、高层民用建筑、地下建筑等得到了更有效的保护。而火灾探测技术是有效避免灾难性火灾的重要保障，智能火灾探测技术能在火灾发生的早期，准确的判断火灾、预报火警，从而保障人民的生命财产安全。 关键词：红外探测，A/D转换，单片机，液晶显示 ABSTRACT This design using reflected type infrared sensors to detect the fire within limited space, this paper analyzes the development status and the sources of the relationship between the infrared sensor output, and based on this, design more infrared fire detection software and hardware systems. System is centered with flame-1000 flame sensors and AT89C51 single-chip microcomputer to carry on the design. The flame sensor sent the analog signal after filter and amplification ADC0809 input, and then into the digital quantity, single chip after treatment, the state of the sensors will be displayed in 12864 the LCD screen, if detection to fire, then give an alarm. We mainly completed system diagram and the drawing of PCB, and certain software design, more infrared fire detection system greatly reducing the time of early fire alarming, raise the accuracy, automatic fire alarm system has already formed the detection of different fire modern fire-fighting automation system, make all kinds of industrial architecture, high civil buildings, underground building wait to have a more effective protection. And fire detection technology is effective to avoid catastrophic fire of important guarantee, intelligent fire detection technology in the fire can early and accurate judgment fire, forecast the fire alarm, thus ensure the peoples life and property security. Keywords： Infrared detection, A/D conversion, microcontroller,