基于单片机双机通信酒精传感器设计.doc

本科毕业论文 （20届） 题 目 学 院 专 业 班 级 学 号 学生姓名 教师 完成日期 本设计最终目的是制作出实物，硬件部分使用PIC16F877单片机、4位一体数码管、MQ-3气敏酒精传感器、焊接用电路板、导线、电容、电阻、晶振等器件。软件编程语言将会使用C语言。在本设计中采用的SPI双机通信技术，会使得制作出的成品功能更加的灵活同时也留下了拓展更多功能的空间。 关键词：PIC单片机；酒精传感器；SPI双机通信；A/D转换；数码管显示 ABSTRACT It is a design in this paper , based on PIC16F877 MCU and MQ-3 alcohol concentration sensor alcohol concentration measuring instrument. It can convert alcohol concentration signals into analog signals , then achieved the identification of analog signals acquisition and convert to digital quantity by the SPI interface communication between two MCU, and on the second piece of MCU through digital tube display digital quantity . So we can complete the basic task of alcohol concentration test . The ultimate aim is to produce physical design , hardware part using PIC 16F877 MCU , four digital tube , MQ-3 alcohol gas sensitive sensor , circuit board soldering , conductor , capacitor , resistor , resistor , crystal vibration device , etc . Software will use C programming language . In this design using the SPI communication technology between two MCU , Will make finished product function to produce more flexible at the same time, it left behind to expand more functions of space. Keywords: PIC MCU; Alcohol sensor; SPI communication between two MCU; A/D conversion; Digital tube display 目 录 1．引言.........................................................................................................................................1 1.1单片机的发展及现状........................................................................................................................1 1.2单片机的引用范畴及发展趋势........................................................................................................2 1.3单片课题设计的任务和要求...........................................................................................................2 2．酒精测试仪的背景知识........................................................................................................4 2.