摘要：随着中国经济的高速发展，国民的生活方式有了巨大的变化。由于人口的老龄化问题，健康和养生意识逐渐进入国民的视野。医疗领域的肺活量测量仪目前普遍使用气体压力传感器来进行测量，无论是测量精度还是使用稳定性方面，气体压力传感器做得都比较出色。利用气体压力传感器检测迅速、方便、计算简单又可以实时控制等特点，是制作肺活量测量仪不可或缺的器件。91211

本次设计是基于单片机的肺活量测量仪，由STC89C52单片机、XGZP6847100KPG气体压力传感器、ADC0832数模转换器和LCD液晶显示器组成。吹气时，气压信号由XGZP6847100KPG气体压力传感器转化为电信号，输入到ADC0832模数转换中得到相应数字信号并送入STC89C52单片机中处理，然后送给LCD液晶显示器进行显示。基于单片机的肺活量测量仪具有性价比高、数据显示直观、使用方便等特点。因此具有广泛的发展前景。

毕业论文关键词：肺活量测量仪，气体压力传感器，单片机，液晶显示器

Abstract:with the rapid development of China's economy, people's lifestyle has changed dramatically。Because of the aging population, health and health consciousness gradually enter the national vision。In the medical field, the measuring instrument of lung's capacity widely uses the gas pressure sensor to measure。 Both the measuring accuracy and the stability of the use, the gas pressure sensor is more remarkable。The use of gas pressure sensor has the advantages of rapid and convenient detection, simple calculation and real-time control。 It is an integral part of the manufacture of the lung capacity measuring instrument。

The design is measuring instrument of lung's capacity based on single-chip and is formed by the STC89C52 microcontroller, XGZP6847100KPGgas pressure sensor, ADC0832 analog-to-digital converter and LCD liquid crystal display。When blowing, pressure signal is transformed into electrical signals by XGZP6847100KPG gas pressure sensor, then is input to the ADC0832 analog-to-digital converter to obtain the corresponding digital signal and sent to the STC89C52 MCU to be managed, and then sent to LCD to be displayed。The lung capacity measuring instrument based on single chip microcomputer has the characteristics of high performance price ratio, intuitional datadisplay and convenient operation。 Therefore, it has broad prospects for development。源G于J优L尔V论N文M网WwW.youeRw.com 原文+QQ75201`8766

Keywords:Measuring instrument of lung'scapacity, Gas pressure sensor,Microcontroller,LCD

目   录

1  绪论 6

1。1课题背景 6

1。2 课题意义 6

1。3 肺活量测量仪的发展现状 6

1。3。1电子类肺活量测量仪 6

1。3。2非电子类肺活量测量仪 6

1。4 课题的设计任务和要求 7

2  相关技术和基础理论介绍 7

2。1 肺活量测量相关概述 7

2。1。1肺活量 7

2。1。2气压传感器 7

2。2通过气压传感器测量肺活量的原理 8

2。3数据采集 8

2。3。1 A/D转换器 8

2。3。2 A/D转换的基本原理 8

2。4 主要器件功能说明 9