USB介面之模組化腦波記錄儀

An USB-Based Modualized EEG Recorder

黃名斌(Ming-Pin Huang)

指導教授 ： 蔡育秀

中原大學/工學院/醫學工程研究所/碩士(2003年)

https://doi.org/10.6840/cycu200300055

摘要

本研究旨在設計並建置一架構於個人電腦上之模組化腦波擷取記錄系統，系統包含放大濾波器模組、類比多工器、微控制器電路、USB介面電路，以及電源隔離器。數位化的腦波圖資料以USB介面傳送至電腦主機作儲存及顯示，而主機端的視窗介面程式開發則用以存取硬體裝置。模組化的設計方式將提供本系統於不同腦波量測情形時的適應性及擴充能力，而USB介面所提供的高傳輸頻寬則改善了傳統RS-232介面在資料傳輸速率上的瓶頸限制。
系統經測試後的結果顯示：放大濾波電路之增益誤差約為1.96%、且-3dB頻率位於0.15Hz及130Hz，並有低於 之等效輸入雜訊；實際人體測試時也可量測出人體於閉目休息時所出現之α波訊號。模組化的設計，以及熱插拔(Hot-Swappable)與隨插即用(Plug- and-Play)的特點，使得本系統之效能優於傳統架構於個人電腦上之腦波記錄器。

關鍵字

腦波圖 ； 通用序列匯流排 ； 熱插拔 ； α波 ； 隨插即用

並列摘要

The objective of this research is to develop a modularized data acquisition system for long term Electroencephalogram (EEG) recoding. The system is consisting of amplifier and filter modules, analog multiplexers, microprocessor control and Universal Serial Bus (USB) communication circuit, and an isolation power adapter. The digitized EEG data are transmitted to a personal computer, via USB, for waveform display and storage. A MS-Windows based application program is developed to access the system. The modularized design offers portable and flexible expansion for different EEG measurement setup. The USB bandwidth provides high throughput communication between the system and PC, and hence, eliminates the conventional RS-232 serial bus
bottleneck.

Experiments showed the system performs – gain characteristics are matched to within 1.96%, with –3dB points at 0.15Hz and 130Hz, and the noise was about 0.5 (equivalent referred to input). While measure from frontal area, an obvious alpha rhythm can be found during relaxed and effortless alertness condition. The modular design, hot-swappable and plug-and-play features made the system superior than traditional PC
based EEG recorder.

並列關鍵字

Electroencephalogram ； Universal Serial Bus ； alpha rhythm ； hot-swappable ； plug-and-play

參考文獻

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