文档介绍：东北石油大学
华瑞学院
毕业论文
论文题目: 红外线脉搏自动测量仪
学生姓名: 张海洋
指导教师: 胡广洲
所学专业: 信息管理与信息系统
2011年6月
Thesis
Thesis topic: Infrared Pulse Autumatic Measuring Instrument
Student name: ZhangHaiYang
Tutor name: HuGuangZhou
Specialty: Information Management and Information System
June 2011
摘要
现代医学认为心血管疾病己经成为危害人类健康的第一杀手因此寻找更加安全,有效和无创伤的心血管诊疗方法是当前医学界人士迫切的需求。
从单片机发出的测量信号经光源驱动电路进行功率放大后,送到指套式光电传感器的红光和红外发射二极管上,使它们发射光脉冲。测量时将人的中指夹在指套里,光脉冲透过手指,通过分析测量部位的血液随脉搏波动引起光吸收的变化推算人体的脉搏。
通过对信号放大,消抖,用555接成施密特触发器,整形成方波接入单片机T1口,通过TR0定时,TR1计数对数据处理,把脉搏数据传输给数码管输出。数码显示电路采用动态显示,采用74HC244锁存器作为驱动,用弹片机P2口作为数据输出端,P1口进行位选。
文章给出了系统的功能特点、设计原理、硬件电路及软件设计等。该系统在提高精度的同时也大大提高了系统的响应速度;该仪器成本低,可靠性高,操作方便。
关键词:红外线;脉搏;单片机
Abstract
The illness of heart is the first killer to health of human race in the modern medicines. The study of pulse wave, including its quantitative diagnose and propagation is one of the hot topics in the fields of clinical medicine, such as how to detect cardiovascular diseases and make early diagnosis without harm.
The signal that is from the microprocessor be blew up by lamp-house circuit sent to the glow and infrared diode of the photoelectric sensor and beamed the ray pulse. Putting the middle finger in the fingertip when the ray pulse permeates the finger and analyzing the signal be absorbed.
The pulse is calculated by measuring the variance of light absorption resulted from blood current waving in the measured part of human body .The signal be made blow up and face lifting by TR0 timing and TR1 taking count
The article gives the system's function, design principle hardware electric circuit and software design etc. It adopts the method of ANGA (Avoiding Noise and Gliding Average) to filter the orderly signal; In the exaltation accuracy it increase the response. The test result express that the steady error is smaller1%.
Key words: pulse test digital filtering;infrared ray;microprocessor
目录
摘要 III
第1章绪论 3
概述 3
本课题设计的要求和实现的方案 3
第2章硬件电路设计 6
脉搏自动测量系统总图 6