燃气泄露报警器设计.docVIP

燃气泄露报警器 摘要 随着现代家居智能化和安全化要求的不断提高，家居燃气安全受到愈来愈多的关注。燃气泄露报警器作为对付燃气这一无形杀手的重要工具，也得到快速的发展和广泛的应用。在结合本科四年所学知识的基础上，本设计使用AT89C51单片机，选用气体传感器TGS813和NG-CO-001作为敏感元件，利用多传感器信息融合技术，开发设计出可用于家庭日常生活及小型企事业单位的燃气泄露检测及其报警系统。 本设计采用AT89C51作为系统的CPU，通过单片机系统实现对家用燃气泄露的检测和报警功能。由TGS813烷类气体传感器和NG-CO-001电化学一氧化碳气体传感器对燃气进行检测，再由AD623仪表放大器将采集到的信号放大并滤波，最后经A/D转化器ADC0809将电信号输入AT89C51芯片。AT89C51将所得的浓度值与设定浓度值相比较得到偏差，通过对偏差信号的处理获得控制信号，对蜂鸣器和LED灯管进行报警控制。本系统的软件编写采用的是汇编语言，整个程序的思路清晰，考虑全面。整个系统设计合理，性能安全可靠。 关键词 单片机 气体传感器 报警临界值 气体浓度 毕业设计说明书（论文）中文摘要 毕业设计（论文）外文摘要 Gas Leakage Abstract With the improvement of the modern home of intelligence and security, more and more attention was paid to domestic gas safety. As an important tool of dealing with gas, gas leakage alarm also gains rapid development and wide application. Based on four-year undergraduate in the knowledge. This design uses AT89C51 microcontroller, selects gas sensor TGS813 and NG-CO-001 as sensitive element to develop gas leak detection and institutions alarm system which can be used in family daily life and small enterprises. This design uses AT89C51 as system CPU, to achieve gas leak detection and alarm function through microcontroller. Firstly, using TGS813 alkali gas sensor and NG-CO-001 electrochemical carbon monoxide gas sensor to detect the gas. Secondly, amplifying and filtering the signal via AD623 instrumentation amplifier. Finally, by A/D converter ADC0809 makes the signal input AT89C51. AT89C51 makes it possible that concentration compared and set value to get the error, then we can gain the control signal through dealing with error signal to achieve the alarm control of buzzer and LED lamp. The software write of this system was written by C language, the thinking of the whole process is clear. The whole system design is reasonable safe and reliable. Key word：Monolithic integrated circuit; Gas Sensor; Reports to the police the marginal value; Coal gas density. 目 录 1 绪论………………………………………………………………………………1 1.1 课题研究的背景………………………………………………………………