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Development of Electroencephalograph Signals Acquisition System Based on Universal Serial Bus Interface
Author: JinXuLin
Tutor: LinJiaRui
School: Huazhong University of Science and Technology
Course: Biomedical Engineering
Keywords: EEG USB Data acquisition Optical isolation
CLC: TH772.2
Type: Master's thesis
Year: 2005
Downloads: 486
Quote: 3
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Abstract
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EEG (electroencephalograph) is a group of brain cells through electrodes recorded the spontaneous , rhythmic electrical activity , the potential of the electrical activity of brain cells as the vertical axis and time as the horizontal axis , so that the mutual relations of the potential time record is the EEG . EEG research, clinical diagnosis of brain function are very meaningful . Clinical application , you can check on brain function , brain injury , cerebral thrombosis , developmental abnormalities , metabolic and endocrine diseases diagnose epilepsy diagnosis is very effective . In recent years , brain-computer interface technology has become a hot topic , especially in the field of rehabilitation engineering is particularly interested in the characteristics of interest to be analyzed is used to control the robot , wheelchairs and other devices can be extracted from the EEG . The traditional EEG machine using a pen to record EEG waveform . Adopt the PC and printer output waveform capture card earlier ISA bus , use the PCI bus more ; while the USB bus with its convenient connection , plug and play significant advantage of a wide range of applications , where development a USB interface - based EEG acquisition system . This article describes the development of the EEG signal acquisition system based on USB interface , the hardware design mainly includes amplifier , filter design , optical isolation , A / D conversion, the MCU Data Acquisition , USB interface communication module . Use the following devices , input stage using TI INA114; HP's high-precision optical isolation optocoupler HCNR201 and feedback ; using TI's ADS8364 A / D conversion ; data acquisition and control and USB interface communication using the the Cypress company 's AN2131Q . The system 's software MCU control data acquisition program design , USB interface communication software , device drivers , Windows application design . Software and development tools used , the microcomputer program written using the Keil C ; USB interface communication debugging using the Cypress EZ-USB Control Panel package ; Device Drivers Driver Studio development ; writing Windows applications using VC 6.0 .
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