目录
目录
摘要 .............................................................................................................................................I
Abstract ................................................................................................................................... II
1 绪论 ........................................................................................................................................1
1.1 背景及意义 .....................................................................................................................1
1。1。1 背景 .....................................................................................................................1
1.1。2 意义 ........................................................................................................................1
1。2 国内外发展现状 ...........................................................................................................2
1。2.1 国内外称重技术发展现状 ....................................................................................2
1。2.2 国内外称重技术发展趋势 ....................................................................................3
1.3 主要工作及论文结构 .....................................................................................................5
2 系统整体设计 ........................................................................................................................6
2.1 系统结构概述 .................................................................................................................6
2.2 动态称重计量原理 .........................................................................................................6
2.3 小结 .................................................................................................................................8
3 系统硬件电路设计 ................................................................................................................9
3.1 系统硬件概述 .................................................................................................................9
3。2 系统微处理器 ...............................................................................................................9
3。3 系统模数转换器 ...........................................................................................................9
3。4 数据采集电路通信接口设计 ....................................................................................11
3。4.1 RS-232C 标准 ......................................................................................................11
3.4.2 MAX232 芯片简介.............................................................................................. 11
3。4.3 串口通信接口电路设计 ......................................................................................11
3.5 程序下载线连接 ..........................................................................................................12
3。6 传感器接口设计 ........................................................................................................13
3.7 Profibus—DP 接口扩展 .............................................................................................14
3。8 小结 ............................................................................................................................15
4 单片机系统软件设计 ..........................................................................................................16
4。1 软件系统概述 .............................................................................................................16
4。2 软件编程语言 .............................................................................................................16
III