基于51单片机的家用温湿度语音播报系统设计.doc

. .. 毕业设计（论文） 题目：基于51单片机的家用温湿度语音播报系统设计 姓 名 学院 名 专 业 指导教师 2014年 月 日 诚信承诺 本人__________声明，本论文及其研究工作是由本人在导师指导下独立完成，论文所利用的一切资料均符合论文著作要求，且在参考文献中列出。 签名： 日期： 摘要 本系统是一个基于单片机AT89C51的语音播报系统的设计，用来测量环境温湿度，整个设计系统分为5部分：单片机控制、DHT11温湿度传感器、液晶显示、语音播报以及键盘控制电路，整个设计是以AT89C51为核心，选用DHT11温湿度传感器，LED12864液晶显示器实现。当测量温湿度超过设定的温度上下限时，启动蜂鸣器和指示灯报警。语音录放选用的集成块是ISD1420 芯片，其保真度高，录音效果好，而且经济实惠。LCD采用的是LCD12864，它具有功耗低、体积小、显示内容丰富、超薄轻巧等优点，应用越来越广泛。整个设计的重点在于编程，因为其外围电路相对比较简单，实现容易。在本论文中附带了软件实现的流程图以及部分子程序以及各种硬件电路图。 关键词：液晶显示；语音播报； ISD1420 ABSTRACT This system is a design of the speech thermometer according to the microprocessor AT89C51,which is used to measure the environment temperature, The whole design system is divided into 5 parts: A microprocessor control, temperature sensor，the LCD display, the speech report and the keyboard control circuit, at the same time ，The whole design take AT89C51 as the core, choose to single bus digital temperature sensor DS18B20, DS1302 serial clock chip, RT1602 LCD monitor realization, LCD display the current date, time, weeks and temperature. When measuring temperature over set temperature fluctuation limit, start with light alarm buzzer. Temperature display stability, and temperature measurement error acuities 1℃, plus or minus temperature the decimal part retained two significant digits. Increased Celsius temperature conversion contrast with Fahrenheit and sets up a display function beep voice automatically broadcast time temperature, manual real-time broadcast time temperature function. The speech recoding &； p layback I choose to use is the IC of ISD1420, it has high fidelity, good record effective, and economic. The LCD I choose is TC1602A, its power consume is low, it has many advantages , for example, the volume is small, the contents is abundant, super thin and agile etc, and its application is becoming more and more extensive. T