北京生物醫(yī)學(xué)工程

一種低功耗微弱生理信號(hào)檢測(cè)系統(tǒng)的設(shè)計(jì)

Weak physiological signal detection system with low power consumption

作者：李華寶譚慧玲何愛軍

單位：南京大學(xué)電子科學(xué)與工程學(xué)院生物醫(yī)學(xué)工程研究所(南京 210093)

關(guān)鍵詞：電生理信號(hào)；檢測(cè)系統(tǒng)；低功耗；放大電路；MSP430；UCOS&UCGUI

分類號(hào)：

出版年·卷·期（頁(yè)碼）：2012·31·2（196-199）

摘要：

目的電生理信號(hào)可以提供人體各種生理狀態(tài)的重要信息，它常常需要長(zhǎng)時(shí)間的監(jiān)測(cè)，因此要求檢測(cè)系統(tǒng)具有低功耗特性。本文設(shè)計(jì)一種基于MSP430F5438處理器的微弱生理信號(hào)檢測(cè)系統(tǒng)，并重點(diǎn)關(guān)注其功耗、可靠性和測(cè)量精度。方法系統(tǒng)包括高性能模擬放大前端、低功耗下位機(jī)和對(duì)上傳的信號(hào)進(jìn)行多種處理的PC機(jī)。下位機(jī)采用MSP430F5438單片機(jī)，它具有功耗低、體積小優(yōu)點(diǎn)，它移植有UCOS&UCGUI系統(tǒng)，方便儲(chǔ)存和處理數(shù)據(jù)。PC機(jī)可以通過USB方便地連接下位機(jī)并處理數(shù)據(jù)。結(jié)果系統(tǒng)可開發(fā)成電池供電的便攜式檢測(cè)儲(chǔ)存裝置，其特色是低功耗和便攜性，這有助于長(zhǎng)時(shí)間檢測(cè)電生理信號(hào)。結(jié)論微弱生理信號(hào)檢測(cè)與處理作為一個(gè)系統(tǒng)工程，在醫(yī)療保健和研究方面有廣大的應(yīng)用前景。

Objective The electrophysiological signals reflect the important physiological information of human body.Because physiological signal often takes a long time to measure，it require the detection system with low power consumption.This paper designs a weak physiological signal detection system based on MCU MSP430F5438，and focuses on its power consumption， reliability and accuracy.Methods The system is consist of a high-performance analog amplifier， the lower part of the machine with low power consumption and a PC computer for processing the information.The lower part of the system uses MSP430F5438 single chip，with the advantages of low power consumption and small size.The MSP430F5438 single chip is transplanted with UCOS & UCGUI system to facilitate the storage and process the data.The PC computer can connect the lower part of the machine easily via USB and process the data.Results The system can be developed into a battery-powered portable storage and detection device，with characteristic of low power consumption and portability，which helps to detect electrophysiological signals for a long time.Conclusions Application prospects of the weak physiological signal detection system as a project is bright in medical care and research.

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