摘要ISFET型pH传感器是人们研究的热点,本文主要内容是以ISFET为基础设计一个pH传感器。从离子敏场效应晶体管的研究背景、目的意义以及ISFET的结构、选型以及其工作机理,还有系统软硬件设计等方面进行了研究。首先通过查阅文献了解了ISFET(离子敏场效应晶体管)的研究背景及研究的进程发展,以及国内外专家目前的研究方向和研究的意义等。之后对pH-ISFET的结构特点和工作原理进行了探讨,接着提出系统的硬件设计包括信号读取电路、单片机、A/D转换器等芯片的选择,最后提出系统整体的软件框架并对系统进行测试。70323
该论文有图14幅,表3个,参考文献30篇
毕业论文关键词:离子敏场效应晶体管 传感器 单片机
The design of a pH sensor based on the ISFET
Abstract Recently,people are very interested in a kind of sensor called ISFET pH sensor,the main contents are based on the design of a pH ISFET sensor. The main contents include background ion sensitive field effect transistor, the significance and the structure of ISFET, selection and working mechanism ISFET.On the other hand works include system software and hardware design. First, We understand ISFET (ion sensitive field effect transistor)background and direction of development through access to information, and the significance of domestic and foreign experts and current research studies. Then we study its structure and working principle,and put forward the hardware design of the system includes a signal reading circuit, the choice of microcontroller and A / D converters. Finally, summed up the whole system software frameworkthe and the system software framework test.
Key Words:Ion sensitive field effect transistor The sensor Single chip microcomputer
目 录
摘要 I
Abstract II
目录 Ⅲ
1绪论 1
1.1课题研究的背景 1
1.2研究的现状 1
1.3研究的目的与意义 2
1.4研究的主要内容 3
1.5论文结构安排 4
2 pH-ISFET传感器工作原理 5
2.1 ISFET传感器简介 5
2.2 pH-ISFET工作原理 7
2.3本章小结 8
3系统硬件设计 9
3.1系统硬件结构框图 9
3.2 信号读取电路 9
3.3 A/D转换器 12
3.4 AT89S51 单片机介绍 15
3.5 数据存储器 18
3.6 LED显示 18
3.7 电源模块 19
3.8硬件抗干扰 20
3.9 本章小结 20
4 软件设计 21
4.1主程序设计 21
4.2 初始化子程序 21
4.3 A/D转换子程序 22
4.4 显示子程序 22
4.5 软件抗干扰 23
4.6 本章小结 ISFET的pH传感器的设计:http://www.youerw.com/zidonghua/lunwen_79579.html