文档介绍：毕业设计(论文)
基于ARM7微控制器的
CE芯片安培检测器的研制
(Development of the CE Chip Amperometric Detector Based on ARM7 Micro-controller)
学生姓名
所在院系
所学专业
所在班级
指导教师
教师职称
完成时间
:
: 电气与信息学院
: 自动化
: 0441
:
: 讲师
: 2008年6月20 日
摘要
当前,毛细管电泳芯片因为具有易于实现微型化的特点而发展十分迅速,由于毛细管电泳芯片的样品体积很小,因此采用高灵敏度的检测方法是十分必要的。电化学检测中的安培检测技术,由于灵敏度较高、仪器简单、价格成本低、线性范围宽、操作简便等优点,己经成功与毛细管电泳联用并得到了广泛的应用。本论文就是基于这一背景,设计了一种以ARM微控制器为核心的新型微毛细管电泳芯片安培检测器
本文研究了毛细管电泳及安培检测的原理和发展等设计背景,确定了系统的总体设计方案并进行了分析与论证。对微安培检测器中的核心器件——恒电位仪提出了新的设计方案。整个系统是以ARM7—LPC2131微控制器为核心搭建的硬件平台,实现了程控电压源、自动增益电路的控制、A/D转换结果的读取与处理、LCD实时显示、与上位机的串行通讯、按键以及报警等功能。软件设计采用C语言编程,实现检测过程的软件控制;并进行了相应的软硬件调试。
实际运行结果表明,该系统能够实现电化学池中微弱电流信号的实时采集与处理,具有较高的实用价值和应用前景。
关键词:安培检测毛细管电泳芯片恒电位仪 ARM7-LPC2131微控制器
Abstract
At present, because of easily being miniaturized, the capillary electrophoresis chip develop very rapidly .As the sample vessel of the capillary electrophoresis chip is small, using high-sensitivity detector is extremely necessary. Amperometric detection technology has been bined with the capillary electrophoresis and has been widely used, being due to its high sensitivity, simple instrument, the low prices , widely linear range , easy to operating and so on. This paper is just based on this background to design a new amperometric detector of micro-capillary electrophoresis chip with a ARM microcontroller.
This paper gives an overview of the design background that of the principles and development of the capillary electrophoresis and amperometric the system’s design project which carried out the analysis and feasibility studies. Proposed a new design proposal for the potentiostatic instrument as the core of micro-amperometric detector. The whole system is based on ARM7-LPC2131 microcontroller as the core structures of the hardware platform. It can realize many functions that include programmable voltage source, the automatic gain control,
pocessing the results of A/D conversion,real-time LCD display ,the munication,the circuit of keystro