摘要：车厢内环境监测系统是一个能监测车厢内实时环境的一个系统。环境监测系统适用性很广，也可以用下其他比如仓库，室内这样的场所。一开始人们使用环境监测系统依靠的是国外的技术和设备，成本较高。而今，我国也有具体的研究和设备，成本较低，效率较好。单片机具有功能强、体积小、价格低，简单灵活等等优点，适用性很广。这次的设计主要是以微处理模块为核心模块，控制整个系统运行，与传感器模块，液晶显示模块和报警模块相连，使他们成为一个完整的系统。而报警模块主要就是将蜂鸣器接入电路可以进行报警。通过对温度、湿度的检测，并在给定温度、湿度的最高最低值区间以外实现越限报警，并点亮相应指示灯。传感器模块用于实时环境下温度、湿度的检测、由于DHT11的数字传输特性，直接接入单片机即可。LCD液晶显示模块接入电路实现对处理后的数据进行显示。50032

毕业论文关键词： 车厢环境；监测系统；单片机

Compartment Integrated Environmental Monitoring System

ABSTRACT：Inside is an environmental monitoring system capable of monitoring a system of integrated environmental compartments. Environmental monitoring system is very broad applicability, you can also use other such as warehouses, indoor such places. People started to use environmental monitoring system relies on foreign technology and equipment, high cost. Today, China also has a specific research and equipment, lower cost, better efficiency. SCM has a strong functions, small size, low cost, simple and flexible and so on merit very good to meet today's requirements. The design mainly micro-processing module as the core module, control the entire system operation, the sensor module is connected to the liquid crystal display module and alarm module, so that they become a complete system. The buzzer alarm module is to access the microcontroller circuit. By detecting temperature, humidity, and at a given temperature, the humidity outside the range to achieve the highest and lowest values of the alarm, and the corresponding indicator lights. Laboratory sensor module for real-time detection of temperature and humidity, since DHT11 number one, integration of the analog to digital conversion module. Directly connected to the microcontroller. LCD liquid crystal display module access the same MCU, microcontroller after the completion of data processing for display.

Keywords:  train environment；monitoring system；microcontroller

目录

1 绪论 1

1.1 课题研究背景和意义 1

1.2 研究现状分析 1

1.3 发展趋势 3

1.4 课题的目的 3

1.5 课题研究的工作原理 3

1.6 需求分析 4

1.6.1 背景分析 4

1.6.2 可行性分析 4

2 系统总体方案 4

2.1 设计思路 4

2.2 方案选择 5

2.2.1 传感器选择方案 5

2.2.2 显示器选择方案 5

2.2.3 单片机的选择 5

2.3 总体设计框图 6

3 系统硬件设计 7

3.1 主模块设计 7

3.1.1 STC89C52芯片的简介