该论文主要设计了一款便携式、多通道、低功耗的脑电VR集成系统，主要用于心理状态评估与心理疾病辅助康复，利用该系统，已完成80余例焦虑状态的脑电信号检测，并进行脑电信号分析与焦虑分级。
The combination of Virtual Reality (VR) technology and Electroencephalography (EEG) measurements
has shown tremendous potential in the fields of psychology and neuroscience research.
However, the majority of EEG measurement devices currently available are expensive, bulky,
uncomfortable to wear, and difficult to integrate with VR headsets. These limitations have hindered
the development of related research fields. This study describes a low-cost (60.07 USD),
small-sized, wireless, high-precision, low-power consumption 4-channel EEG measurement system
(NeuroVista) for frontal area EEG measurements, which can be used with a VR headset,
enabling EEG measurements in VR environments. The system has an input-referred noise of less
than 0.9480 μVrms, a common mode rejection ratio of over 96 dB, a measurement resolution of
less than 0.1 μV, a bandwidth of 0.5 ~ 45 Hz, and works at a sampling rate of 250 Hz. It also
supports metal dry electrodes and includes a built-in analog bandpass filter, right-leg drive circuit,
and built-in digital lowpass filter and notch filter, which can reduce noise during measurement.
Researchers can reconstruct the electrode system to measure regions of interest
according to their needs.
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