数控直流电流源设计毕业设计2毕业论文及文献综述.doc

PAGE PAGE 40 东华理工大学长江学院 毕业设计(论文) 题 目 数控直流电流源 英文题目 NC DC CURRENT SOURCE 学生姓名 李金壕 学 号 指导教师 高浪琴 职称 副教授 专 业 电子信息工程 二零零八年 六月 六 日 East of the Yangtze River Graduation Design(Papers) Subject Student Name Jinhao Li Student Number The instructo Langqin Gao Job Title Associate Professor Professional Electronic and Information Engineering June 6, 2008 摘 要 随着电子技术的不断进步，对电子仪器的要求也不断提高。电源作为电路的动力源泉更是扮演着越来越重要的角色，不论是学校实验室还是维修中心都离不开实验电流源，然而传统的电流源不论是在控制精度还是输出特性上都无法满足要求。 随着单片机技术的不断发展和D/A，A/D技术的不断成熟使得数控电源成为可能，数控电流源不论是在控制精度还是在可操作性上都有传统电源无法比拟的优势。 本设计软件设计采用汇编语言，对单片机进行编程实现各项功能。软件设计的关键是对直流电流源的正负步进电流控制以及显示。设计软件完成三个功能：系统初始化；键盘检测和D/A转换。 本设计在参考传统电流源以及普通数控电流源的基础上，充分考虑了性价比的同时更极大地提高了数控电流源的准确性，通过软件修正后在使用普通元件的情况下，数控电流源的性能也达到了较高的水平。 关键字：高精度； DAC0832； D/A转换； 恒流源； ABSTRACT A electric current source of machine control based On single-chip microcomputer Progress unremittingly the request to the electronics instrument technically to also raise continuously along with the electronics, the power supply is the motive source of the electric circuit to play a more and more important role more, is the school a laboratory still repair centerses to all can not get away from an experiment power supply in spite of, however the traditional power supply is control accuracy or output the tops of the characteristic in spite of and cant satisfy a request. Along with single slice machine technical of develop continuously with the D/A, the A/D is technical continuously the maturity make the number control power supply to make possible, count to control the electric current source and is control accuracy in spite of still on the maneuverability all there is traditional power supply cant compare to of advantage. The design software designed with assembly language