摘 要：本设计采用以低功耗单片机MSP430F149为核心,设计一种随身携带的人体健康信息采集仪器。该系统通过测量人体的温度、脉搏、血压信号，经过调理电路送入单片机，测量结果显示在LCD上，并且脉搏波形通过串口送入PC机，实时显示脉搏波形。
该系统的温度采集芯片采用的是单总线温度传感器DS18B20，温度测量精度达到0.0625℃，具有成本低，安装方便，可靠性高的特点。该系统的脉搏传感器采用的是PVDF型压电式传感器，此传感器具有压电常数大，灵敏度高且柔韧性好，加工后可以做到紧贴皮肤，拥有阻尼小、具有带宽特性的特点，满足脉搏信号的频率特性。血压传感器具有输出范围广，线性度好特点，满足设计需求。同时系统加入液晶模块，这对系统的调试有着人性化帮助。
实验结果表明，该设计具有成本低、可靠性高、测量精度高、携带方便等特点，对于老年人身体健康状况监测具有很大的帮助。
关键字：脉搏；温度；血压；测量；单片机MSP430F149
Abstract : This design uses the low-power microcontrollers MSP430F149 as the control core, a portable human health information acquisition apparatus is design. By measuring body temperature, pulse, blood pressure signal, the system used a conditioning circuit to input these information into the MCU, the results are showed in LCD, and the pulse wave is input into PC through the serial port, pulse waveform was real-time displayed .
The system of temperature acquisition chip used a single bus temperature sensor DS18B20, the temperature measurement precision can reaches 0.0625℃,it has the advantages of low cost, convenient installation, high reliability. The system of pulse sensor used the piezoelectric sensor of PVDF type, the sensor has a piezoelectric constant, high sensitivity and good flexibility, it had the characteristic of close to the skin, small damping, a bandwidth characteristics after processing, it can meet the frequency characteristics of pulse signal. A blood pressure sensor has an output range and good linearity characteristics which can meet the design requirements. At the same time, the system add the LCD module which has friendly help for the debugging of the system.
The experimental results show that the design has the advantages of low cost, high reliability, high measuring precision, convenient portability and other characteristics, it also has a great help for the elderly health condition monitoring.
Keyword: heartrate;temperatuer;bloodpressure;measurement; MSP430F149microcontroller
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