毕业设计 家用煤气泄漏报警控制器硬件设计.doc

本 科 毕 业 设 计 毕业设计题目：家用煤气泄漏报警控制器硬件设计 摘 要 当今社会上，出现了许多煤气报警器，而这些产品大都是针对煤气的泄漏所做出的相应的报警，即为家庭式。但是随着社会的发展，煤气报警器也在发展。 微机控制技术、传感器在工业控制、机电一体化、智能仪表、通信、家用电器等方面得到了广泛应用，显著提高了各种设备的技术水平和自动化程度。因此对这些原理和结构我们就需要很好的了解并掌握。 煤气报警系统采用了RCM5700为系统的CPU，通过单片机系统设计实现对家用煤气的控制功能，由NG-CO-001电化学一氧化碳气体传感器 关键词： 电位器采样 报警临界值 煤气浓度 Abstract In the current society, a lot of coal gas alarms have appeared, and these products are mostly to letting out corresponding alarms made of coal gas , it is family. But with the development of society, coal gas alarm develop too.Microcomputer control technology, sensors in the industrial control, mechatronics, smart instrumentation, communications, household appliances, etc. has been widely applied, significantly improved the technological level of equipment and degree of automation. Thus the structure of these principles and we need to understand and grasp the good. Coal gas warning system adopt RCM5700 computer CPU of system,Design a realization through a single slice of machine system to the control function of household-use coal gas. The NG-CO-001 electricity chemistry carbon monoxide air spreads a feeling machine to carry on an examination to the coal gas and compares density value and enactment density value gaining to get deviation,the processing that passes to the deviation signal acquires control signal and regulate coal gas to give vent to anger the of valve break.four coal gas density corresponding analog quantity of unit utilize A/D person who changes figure into, and has joined key in,carry out the control that leaks air to the household-use coal gas thus.The hardware circuit of the whole system is reasonable in design, performance is safe and reliable. Keyword: The electric potential device sampl 目 录 1、绪论 1 1.1、课题研究的背景 1 1.2、课题研究的目的 1 1.3、国内外研究现状及发展动态 2 1.4、系统设计基本内容 4 2、系统设计技术基础 5 2.1、系统实现方案与选择 5 2.2、MINI CORE芯片选择 7 2.3、一氧化碳传感器的选择 15 2.4、仪表放大器的选择 21 2.5、A/D转换器选择 23 3、基于RCM5700的系统电路设计 24 3.1、系统硬件电路总体设计 24 3.2、信号采集放大电路的设计 26 3.3、运放电路及A/D