09/05/14 (Fri)
We still discussing how to prove ECG can determine sleepiness. Finally we found the information of someone report of their research about Heart Rate Variability (HRV). I have tried to read it although I can't fully understand it but I know the HRV analysis study can tell us a lot of information about our body condition.
From the report it shows that typical HRV in human has three main frequency bands. When a person from waking stage change to sleeping stage, the frequency bands will be changed.
Besides, we have found the some sensors can get ECG signal by skin contact-less but we still reading on it and see which one is better for our project and more convincing information.
12 May 2014
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