基于单片机的液化气检测报警器设计毕业论文

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JIU JIANG UNIVERSITY

毕 业 论 文

题 目基于单片机的液化气检测报警器设计 英文题目 Based on MCU Liquefid Gas

Detection Alarmdesign

院 系 信息科学与技术学院 专 业 计算机科学与技术

摘 要

随着社会和经济的发展，防火工作越来越重要，但是目前国内的许多研发都侧重于大型场所的火灾报警。因此，我们就有必要研制一种结构简单、经济实用的家庭液化气报警器以适应市场的需求。基于供家庭使用的液化气报警器应该具备的基本要求和功能，文章设计了一种比较适合的液化气报警器。

液化气全名液化石油气，它的主要成分是丙烷和丁烷，炼厂气、天然气中的轻质烃类在常温、常压下呈气体状态，在加压和降温的条件下，可凝成液体状态。该设计基于51系列单片机为核心，以气敏传感器检测可燃气体的质量浓度，经过信号处理后，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，蜂鸣器将发出声报警，并同时红灯亮，具有声光报警功能，数码管显示浓度。如果检测的信号浓度没有达到预定值，绿灯亮。系统采用交流电源或电池供电。该系统电路操作方便，体积小，成本低，功耗低，等特点。 关键词：液化气，51系列单片机，蜂鸣器

Abstract

Along with the social and economic development, fire prevention work more and more important, but the present many research and development are focused on large place of the fire alarm. We, therefore, it is necessary to develop a simple structure, economic and practical family smog announciator to adapt to the demand of the market. Based on the use of smoke alarm for family should be provided with the basic requirements and function, this article designs a more suitable for smoke alarm.

Liquefied gas full name liquefied petroleum gas (LPG), it is the main component of butane and propane, refinery gas, natural gas of lightweight hydrocarbons in room temperature, atmospheric pressure gaseous, pressure and temperature in the condition, can condensed liquid state. The design is based on 51 series microcontroller as the core, with gas sensor detection of flammable gas mass concentration, after signal processing, directly into single chip microcomputer, the monolithic integrated circuit to signal detection judgment. If the quality concentration more than scheduled value, will be issued a buzzer sound alarm, and at the same time the red light comes on, with sound and light alarm functions, digital pipe display concentration. If the signal detection concentration not to the expected value, a green light. System USES the ac power or batteries. This system, which is convenient operation, small volume, low cost, low power consumption, etc. Characteristics.

Keywords: Liquefied Petroleum Gas (LPG), 51 Microcontroller, Buzzer