（毕业设计论文）《基于单片机的多通道磁信号检测仪设计》.doc

攀枝花学院本科毕业设计（论文） 基于单片机的多通道磁信号检测仪设计 学生姓名： 学生学号： 院 （系）： 电气信息工程学院 年级专业: 2008 级自动化 指导教师: 助理指导教师 二〇一二年五月  摘 要 金属磁记忆技术检测可以快速检测金属构件应力集中区，进行缺陷的早期诊断。随着金属磁记忆检测技术在我国石油、化工、航空航天、冶金、电力、轻工、建筑、交通、运输等领域的应用和推广，必将大大降低承压及特种设备和重要金属部件的安全隐患，减少事故发生率,同时,为其它弱磁检测技术的研究和应用提供基础和借鉴，推动我国无损检测技术的进步。基于单片机的多通道系统是将来自传感器的信号通过放大、线性化、滤波、同步采样保持等处理后，输入A/D转换为数字信号后由单片机采集，然后利用通信将数据送到PC机进行数据的存储、后期处理与显示，实现了数据处理功能强大、显示直观、界面友好、性价比高、应用广泛的特点 ABSTRACT Metal magnetic memory testing technology can fast detection metal components, high stress, for defect of early diagnosis. As metal magnetic memory testing technology in china’s oil industry, chemical industry, aviation, metallurgical, power, light industry, construction, transportation, transportation and other areas of application and promotion, will greatly reduce the pressure and special equipment and important metal components of potential safety problems, reduce accident rate, at the same time, for other weak magnetic inspection technology research and application provides basis and the reference technology research and application provides basis and the reference, promote the progress of nondestructive testing technology. Based on SCM multi-channel magnetic signal detection system is HMC1021 magnetic sensor for metal component coding magnetic memory signals. The design of the single chip microcomputer data acquisition system is directly related to the detection system detection precision and quality , is one of the core of the detection system. The single-chip microcomputer data acquisition system consists of amplifying filter circuit, much channel selection system , A/D converter circuit and single-chip microcomputer control circuit, level of transform circuit etc. This system is the signal through will come from sensor amplification, linear, filtering, synchronous sampling keep processing, the A/D conv