The invention discloses a blink and tooth bite judgment method and
system based on an electroencephalogram, and belongs to the field of electroencephalogram
signal processing and
feature extraction.The method comprises the steps that a reference
point set extracted from the electroencephalogram is obtained, and the mean value and the standard deviation of the reference
point set are calculated; comparing the current
data point with a tooth-
biting judgment threshold value to obtain a tooth-
biting state value, if the tooth-
biting state value meets a preset tooth-biting state threshold value, outputting a judgment result that the tooth is bitten, and otherwise, outputting a judgment result that the tooth is not bitten; acquiring current acquisition window data of the sliding window, calculating an absolute value of a difference between the current acquisition window data and a mean value of the reference
point set, comparing the absolute value with a preset threshold of a standard deviation of the reference point set to obtain a blink state value, and comparing the blink state value with a preset blink state threshold, if the blink state value meets a preset blink state threshold value, outputting a judgment result of blink, otherwise, not blink; updating the reference point set according to a preset
control factor and the current
data point; and application of the BCI in the
engineering control field is possible by using the artifact
signal.