目 录
摘 要.................................................................................................................................................I
Abstract..............................................................................................................................................I
1 系统设计任务 .................................................................................................................................2
1.1 设计任务 .............................................................................................................................2
1.2 设计要求 .............................................................................................................................2
1.2.1 基本要求 ...................................................................................................................2
1.2.2 发挥部分 ...................................................................................................................2
2 方案设计与论证 .............................................................................................................................3
2.1 系统方案论证 ......................................................................................................................3
2.2 电源模块 .............................................................................................................................5
2.3 主控系统 ..............................................................................................................................6
3 理论分析与计算 .............................................................................................................................6
3.1 电桥测量法测电阻 .............................................................................................................6
3.2 威尔逊电流源 .....................................................................................................................7
3.3 坐标点的测量方案 .............................................................................................................7
4 电路设计 ........................................................................................................................................8
4.1 Luminary Micro LM3S3748 单片机 ...................................................................................8
4.2 高性能 AD 转换 .................................................................................................................8
4.3 手写板设计 .........................................................................................................................9
4.4 信息显示模块 ....................................................................................................................10
5 软件设计 ......................................................................................................................................10
6 测试结果与误差分析 ...................................................................................................................11
6.1 测试仪器 ............................................................................................................................11
6.2 测试及性能分析 ................................................................................................................11
6.3 结果与误差分析 ..........................................................................................................12
6.3.1 系统测试结果 ................................................................................................................12
6.3.2 低功耗设计 ....................................................................................................................13
6.3.3 系统误差分析 ................................................................................................................13
7 讨论与总结 ..................................................................................................................................13
参考文献 ..........................................................................................................................................13
附录 ..................................................................................................................................................14
