学士学位论文___基于at89s51单片机的电子血压计设计.doc

基于AT89S51单片机的电子血压计设计 摘 要 电子血压计具有易携带、精度高、智能化等特点，随着现代电子技术的发展，电子血压计呈现出家用化的趋势。传统单片机的电路设计复杂、稳定性不好测量精度不高首先从血压测量方法切入设计出电路系统，然后以AT89S51单片机为，外围硬件电路由气体压力传感器US9111、串行A/D转换芯片ADC0832、LCD驱动芯片和其他模拟电路组成，同时采用KeiluVision2进行C语言编程。本文所设计的血压计稳定性高，测量速度快，测量精度高，测试结果基本与水银血压计一致。另外，本系统的设计能满足人体健康测量需要，对提高日常生活质量有很多好处，具有很高的市场价值。 关键词:单片机 血压计 传感器精度The Design of Electronic Sphygmomanometer Based on AT89S51 MCU Abstract The electronic blood pressure monitor is easy to be carried, high accuracy, intelligent features .With the development of modern electronic technology, electronic blood pressure monitor shows the trend of the household. The circuit of the traditional microcontroller’s design process is complex, and the stability is not good, as well as that the measurement accuracy is not high. Therefore, to sum up, the method of how to design the circuit system is the blood pressure measurement briefly, and then around the AT89S51 microcontroller development platform, composed of the peripheral hardware circuit by the gas pressure sensor US9111, the serial A/D conversion chip ADC0832, the LCD driver chip and other analog circuits under the preparation of KeiluVision2 the C programming language. This sphygmomanometer designed perfect stability, excellent speed, high accuracy, and above all, the test results are basically consistent with the mercury sphygmomanometer. In addition, the design of this system meets the needs of the human health measurement. Moreover, there are many benefits to improve the quality of daily life, and of course it has a very high market value. Key Words: MCU; sphygmomanometer; sensor; accuracy; 目 录 1. 绪 论 1 1.1 课题背景与现实意义 1 1.2 血压计发展现状 2 1.3 本文的研究内容 3 2. 设计要求及方案论证 4 2.1 血压测量原理 4 2.2 设计要求 5 2.3 设计方案 5 2.4 器件介绍 6 2.4.1 AT89S51单片机简介 6 2.4.2 模数转换器ADC0832简介 7 2.4.3 压力传感器（US9111-006-D）简介 9 2.4.4 运算放大器OP07和AD620简介 10 3. 硬件电路设计 11 3.1 数据处理模块 11 3.2 模数转换模块 12 3.3 1602点阵液晶显示 12 3.4 气体压力传感器电路模块 14 3.5 血压信号二次放大电路 15 3.6 滤波电路 15 3.7 气泵和气阀驱动电路 17 4. 软件设计 18 4.1 数据处理模块 18 4.2 A/