具儲存生理訊號功能之USB霍特心電圖系統

USB Holter System with Physiological Signal Storage Capability

劉俊成(Chun-Chen Liu)

指導教授 ： 李仁貴

國立臺北科技大學/機電學院/電腦與通訊研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00314

摘要

本研究的目的在於開發一種具儲存生理訊號功能之USB(Universal Serial Bus)霍特心電圖系統，藉由本系統之USB Host匯流排將心電圖寫入USB Device匯流排的快閃記憶體裝置中，達到可即時並長時間擷取心電圖訊號的目的。
系統架構主要採用德州儀器MSP430控制處理器，大幅降低整合霍特心電圖系統的成本，並且以軟體實現數位濾波，以達到即時濾除雜訊。為驗證系統的準確性，本論文先利用控制處理器內建的ADC(Analog-to-Digital Conversions)模組將心電圖的訊號數位化後，透過UART模組傳到個人電腦端，再將此心電圖資料還原回波形。再將寫入快閃記憶體裝置中之FAT(File Allocation Table)規格檔案格式的心電圖資料在個人電腦端也還原回波形，將前後波形做比較，以確保寫入快閃記憶體裝置的心電圖資料在個人電腦端還原後與ADC模組輸入端的原始心電圖相同。
最後，本系統已完成建構一低成本可商業化的二十四小時霍特心電圖系統，並可透過Gateway將儲存在快閃記憶體裝置的心電圖資料傳給醫院端的遠端電腦，如此醫生便可觀察病患的心電圖數據，如發現異常再通知病患回來檢查，以有效減輕醫院的門診量。

關鍵字

USB ； 霍特 ； 心電圖 ； FAT ； 快閃記憶體

並列摘要

The purpose of this study is to develop a USB(Universal Serial Bus) Holter system with physiological signal storage capability. Through the USB Host bus, ECG (electrocardiogram) signal is stored in the flash memory device of USB Device bus, which reaches the goal of providing immediate and long-term collecting capability of ECG signal.
System mainly uses TI MSP430 microprocessor that substantially reduces the costs of integrating the Holter system, and the digital filtering software to process the noise signals instantaneously. To verify the system’s accuracy, this paper indicates firstly by using microprocessor’s built-in ADC(Analog-to-Digital Conversions) module, ECG signal is digitized and then transferred to PC via UART modules, and then transformed it back to waveform. Secondly, the ECG data stored in flash memory device in FAT(File Allocation Table) format is to be transformed back to waveform as well. Last, two sets of waveform data will be compared to see if they are identical.
Finally, this system is to finish to construct a low-cost, commercialized, 24-hour Holter system, and it can send ECG data that is stored in flash memory devices, to the remote computer terminal in Hospital, enabling doctors to easily observe the patient's ECG data. Doctors can notify patients for check-ups if any abnormality is found in his/her ECG data, which can substantially reduce the patient numbers of hospital’s outpatient service.

並列關鍵字

USB ； Holter ； ECG ； FAT ； Flash memory

參考文獻

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