本科毕业设计__基于单片机的电子测频仪系统设计.doc

河南机电高等专科学校 毕业设计论文 论文题目：基于单片机的电子测频仪系统设计 系 部 电子通信工程系 专 业 班 级 学生姓名 学 号 指导教师 2013年01月 08 日 目 录 摘 要 I Abstract II 引言 1 1课题研究的背景及内容 2 2 系统设计基本原理 2 2.1 心率的测量原理 3 2.2 频率的测量方法 3 2.2.1 直接测频法 3 2.2.2 周期测频法 3 2.2.3 综合测频法 4 2.3 AT89C52单片机的简单介绍 4 2.3.1 AT89C52各引脚功能及管脚电压 4 2.3.2 AT89C52的主要引脚介绍 5 3 系统硬件的设计 7 3.1 系统硬件的设计思路 7 3.2 系统电路各模块设计 7 3.2.1 心电信号的获取 7 3.2.2 心电信号的调整模块 8 3.2.3 单片机测频电路及显示 11 3.2.4 单片机与计算机的通信 12 4 系统软件设计 17 5 结论 20 致谢 21 参 考 文 献 22 附录1程序清单..................................................................................................................................23 附录2程序清单..................................................................................................................................28 摘 要 随着我国人口老龄化程度的加快物质生活,心血管心脏病疾病,人们对这一类疾病的预防也在因此,人们希望有一种医疗仪器,能够在家里随时随地进行心电图信号的测量。作为一个医生，在门诊和查病房时，也希望有一个可以随身携带的仪器，方便疾病的快速诊断鉴于此,利用单片机研制成功一种便携式,并通过RS-232串行接口与计算机相连接是一种新颖的临床和家庭兼用的心电图仪。 心电图信号单片机With the faster increase of old population and the improvement of living standard, disease such as cardiovascular and heart trouble is more frequent in our life and our consciousness of prevention and cure against these disease is also raising continuously. So we hope a kind instrument can be developed to measure the frequency of our ECG signal anytime anywhere by ourselves so that we can avoid danger by mastering our health condition at anytime. For adoctor,he also hopes there is a carry-on frequency measurementinstrument to facilitate rapid diagnosis. So the carry-on frequency measurement instrument is becoming the research focus. In view of this, we developed a kind of carry-on frequency measurement instrument based on the knowledge of medical signal detection, signal processing, information storage and intelligent analysis by SCM.The instrument can realize teletransmission by connecting to the computer through the RS-232 serial interface.It do realized remot