目录
摘要.............................................................................................................................................I
Abstract………………………………………………………………………………………..II
第一章 绪论…………………………………………………………………………………...1
1.1 研究背景.......................................................................................................................1
1.2 基于单片机的智能压力检测的原理...........................................................................2
1.2.1 压力的概念.........................................................................................................2
1.2.2 测量压力的意义.................................................................................................3
第二章 基于单片机的智能压力检测系统的硬件设计…………………………………….4
2.1 压力传感器...................................................................................................................4
2.1.1 压力传感器的选择.............................................................................................4
2.1.2 金属电阻应变片的工作原理..............................................................................4
2.1.3 电阻应变片的基本结构...................................................................................6
2.1.4 电阻应变片的测量电路.....................................................................................6
2.2 信号放大电路...............................................................................................................8
2.1.2 放大器的选择.....................................................................................................8
2.2.4 三运放大电路.....................................................................................................9
2.3 A/D 转换器..................................................................................................................10
2.3.1 A/D 转换模块器件选择....................................................................................10
2.3.2 A/D 转换器的简介............................................................................................10
2.3.3 配置位说明.......................................................................................................11
2.3.4 ADC0832 工作时序图 ......................................................................................12
2.3.3 单片机对 ADC0832 的控制原理 ....................................................................13
2.4 单片机.........................................................................................................................14
2.4.1 AT89C51 单片机简介.......................................................................................14
2.4.2 主要特性…........................................................................................................15
2.4.3 管脚说明...........................................................................................................15
2.4.5 芯片擦除...........................................................................................................17
2.5 单片机于键盘的接口技术........................................................................................18
