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 Probus—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
III