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摘 要：本設(shè)計采用以低功耗單片機MSP430F149為核心,設(shè)計一種隨身攜帶的人體健康信息采集儀器。該系統(tǒng)通過測量人體的溫度、脈搏、血壓信號，經(jīng)過調(diào)理電路送入單片機，測量結(jié)果顯示在LCD上，并且脈搏波形通過串口送入PC機，實時顯示脈搏波形。 該系統(tǒng)的溫度采集芯片采用的是單總線溫度傳感器DS18B20，溫度測量精度達到0.0625℃，具有成本低，安裝方便，可靠性高的特點。該系統(tǒng)的脈搏傳感器采用的是PVDF型壓電式傳感器，此傳感器具有壓電常數(shù)大，靈敏度高且柔韌性好，加工后可以做到緊貼皮膚，擁有阻尼小、具有帶寬特性的特點，滿足脈搏信號的頻率特性。血壓傳感器具有輸出范圍廣，線性度好特點，滿足設(shè)計需求。同時系統(tǒng)加入液晶模塊，這對系統(tǒng)的調(diào)試有著人性化幫助。 實驗結(jié)果表明，該設(shè)計具有成本低、可靠性高、測量精度高、攜帶方便等特點，對于老年人身體健康狀況監(jiān)測具有很大的幫助。 關(guān)鍵字：脈搏；溫度；血壓；測量；單片機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 |
