基于430单片机的智能脉搏测试仪设计_图文.doc

基于430单片机的智能脉搏测试仪设计 摘要 整个系统采用两种供电方式：适配器供电和4节1.5V的电池供电。两种供电方式切换简单，当插上适配器时系统采用适配器供电，当拔掉适配器时就是电池供电。可以大大降低使用成本。设计上解决了电源完整性、信号完整性等系列问题。设计方案达到了预定的设计指标。 关键词:、MSP430、液晶、红外线、FLASH存储  The Intelligent Pulse Meter design Abstract： This works by TI company MSP430F2619 controller as the core, the infrared pulse tester is designed and produced. Using infrared tube, using the principle of finger tip blood concentration change with pulse, the pulse signal into electrical signal, adopt the cheap and practical LM324 , signal amplification plastic, filtering, level after practical common comparator LM311 get pulse signal, into a single chip for processing. Use of MSP4430F2619 capture/compare function, measuring a pulse cycle, greatly reducing the real-time counting time and testing. On software processing for data mining into the algorithm processing block error values, to improve the stability of the test data. Using MSP430F2619 internal ADC function, the pulse signal is converted into digital quantity, drawing on the 240128 LCD, can see the pulse beat intuitive. For the test data, intelligently will be deposited in the single chip microcomputer internal FLASH, using also will not be lost, to facilitate users to a period of time the physical condition of comparison and evaluation. The whole system consists of two power supply modes: 1.5 V power supply and adapter section 4 of the batteries. Simple to switch between two kinds of power-supply modes, when system adopts adapter, power supply, plug in the adapter is the battery power when unplug the adapter. Can greatly reduce the cost. Design to solve the power integrity, signal integrity, etc. Design has reached the design index. Key words：pulse meter,MSP430、LCD、Infrared、FLASH storage 第1章 前 言 1 1.1 脉搏测试仪的应用与发展 1 1.2 国内外研究现状 1 1.3 本文研究的主要内容 2 第2章 总体方案设计 3 2.1 总体方案框图 3 2.2 红外脉搏传感器原理 3 2.3 一阶有源低通滤波器原理 4 2.4 FLASH存储 4 第3章 硬件系统设计 5 3.1 硬件系统的总体设计 5 3.2 方案选择 5 3.2.1 电源系统 5 3.2.2 放大电路 6 3.2.3 滤波电路 7 3.2.4 比较电路 7 3.2.5 A/D转换电路的方案选择 8 3.2.6微处理器的选