[信息与通信]《基于单片机的智能液化气报警器设计》.doc

摘要 在日常生活和石油化工企业，一旦发生可燃性气体的泄漏而未采取有效的措施，将会对人身及财产产生极大的影响，甚至会产生毁灭性的灾难。对可燃气体泄漏做出预先判断，在事故未扩大之前采取措施，可以避免事故的发生。液化气属于可燃性气体的一种，因此对其检测、监控、报警是很有比要的；而单片机在可靠性、实时性和灵活性方面都有突出优点。本设计将这两方面结合起来，设计了基于单片机的智能液化气报警器。 该设计基于PIC单片机为核心，以气敏传感器检测可燃气体的质量浓度，经过信号调理后，直接读入单片机中，单片机对检测的信号进行判断。如果质量浓度超过预定数值时，将发出声光报警。系统带有液晶显示和键盘输入，可设置报警器的相关参数；系统采用市电和电池两路供电。该系统电路操作方便，体积小，成本低，功耗低，可靠性高，寿命长等特点。 关键词：液化气，PIC单片机，气敏传感器，智能报警器 Abstract In everyday life and petrochemical enterprise, in the event of leakage of flammable gases and are not taking effective measures, will have a tremendous impact on personal and property, even will have a devastating disaster. Combustible gas leak to prejudge, taken measures prior to the accident did not expand, you can avoid the occurrence of accidents. Liquefied gas is flammable gas, so it is than to its detection, monitoring, alerting and single-chip computer in terms of reliability, real-time and flexibility has a big advantage. This design will combine these two aspects, design of MCU-based intelligent gas alarms. The design is based on PIC single-chip computer as the core, to gas sensor detection of combustible gas concentration, after signal conditioning, read directly into single chip, single-chip microcomputer on the test signal of judgment. If the concentration exceeds the book value, there will be a sound and light alarm. System with LCD display and keyboard input, you can set the alarm parameters; two ways power supply system and use both batteries. The system circuit is easy to operate, small size, low cost, low power consumption, high reliability, long life and other characteristics. Keywords: liquefied petroleum gas， PIC Microcontroller， gas sensor， intelligent alarm 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc293946072 摘要 PAGEREF _Toc293946072 \h I HYPERLINK \l _Toc293946073 Abstract PAGEREF _Toc293946073 \h II HYPERLINK \l _Toc293946074 目录 PAGEREF _Toc293946074 \h III HYPERLINK \l _Toc293946075 第1章 绪论 PAGEREF _Toc293946075 \h 1 HYPERLINK \l _Toc293946076 1.1研究背