肺活量测量仪的设计.docx

肺活量测量仪的设计 学院： 专业： 年级: 指导老师： 学生姓名： 日期： III III 摘 要 肺活量在某种意义上反应了人体呼吸机能的潜在能力，所以当健康问题成为如今社会关注的焦点时，人们开始更加注重肺活量等与人类健康息息相关的问题。因此，需要设计出性能更加优越的肺活量测量仪，进一步保障社会大众的健康，适应人民愈来愈高的生活要求。 本论文在研究了先进的技术成果的基础上，分析了已被之前的设计者所采用的方 案，介绍了关于肺活量测量仪研发的相关背景和发展趋势，选择以 MPX4115 压力传感器进行数据采集的设计方案。根据电子肺活量测量仪系统各模块的功能，采用 ADC0804 进行模数转换，利用 AT89C51 进行数据处理和控制，使用 LM016L 进行液晶显示，并且通过串口进行通信，运用这些芯片组合并且结合课题要求构造出电路原理图，完成硬件结构的构造。关于软件方面，采用模块化设计的方法完成程序的设计与编译。 在设计完成之后对整个测量系统的的误差和干扰的来源和解决措施进行了分析。这是一种非传统电子肺活量测量仪的设计原理和实现方法。，本次设计只是一个入门学习， 在此基础上，可以进一步研发性能更加优异的肺活量测量仪。 关键词 ：肺活量测量；AT89C51；压力传感器；液晶显示 DESIGN OF VITAL CAPACITY MEASURING INSTRUMENT ABSTRACT This paper introduces the principle of design and the realization method of a kind of non traditional electronic vital capacity measuring instrument. It has higher accuracy, sensitivity and portability compared to the traditional method. The design uses the AT89C51 microcontroller as the main control chip, plus MPX4115 pressure sensor, ADC0804 analog to digital converter, 1602 type liquid crystal display and serial communication chips, etc… In this paper, on the research of the advanced technological achievements based on, analyzes the scheme has been preceded by designers using, introduced on vital capacity measuring instrument research and development background and development trend, choose to mpx4115 pressure sensor design scheme of data acquisition. According to the function of electronic vital capacity measurement instrument for each module of the system, using ADC0804 analog-to-digital conversion, using AT89C51 for data processing and control, use lm016l liquid crystal display and through the serial port communication, the combination of the use of the chip and according to the requests of the topic structure of the circuit principle diagram, constructs the structure of the hardware. In terms of software, the design and compile of the program are completed by the method of modular design. After the design is completed, the error of the whole measurement system a