APPARATUS AND METHOD FOR MEASURING PHYSIOLOGICAL SIGNAL

摘要

A method for measuring a physiological signal is provided. The method is applicable to optical physiological measurement with at least two types of light sources. The method includes a processing for adjusting amplitudes of signals of the at least two types of light sources to a predetermined ratio by adjusting intensities of the light sources, so as to increase a signal dynamic range as well as a signal-to-noise ratio.

主权项

1. A method for measuring a physiological signal, comprising:
providing a plurality of a signal of at least two types of initialization signals and a plurality of one other signal of the at least two types of initialization signals; driving at least two types of light sources according to the plurality of the signal of at least two types of initialization signals and the plurality of the other signal of the at least two types of initialization signals, such that at least one optical detector outputs a plurality of a signal of at least two types of reception signals and a plurality of one other signal of the at least two types of reception signals; selecting a signal of at least two types of candidate signals for correspondingly rendering one of the at least two types of light sources to enter saturation from the plurality of the signal of the at least two types of reception signals, and selecting one other signal of the at least two types of candidates signals from the plurality of the other signal of the at least two types of reception signals, wherein a ratio to the signal of the at least two types of candidate signals to the other signal of the at least two types of candidate signals is approximate to a predetermined ratio; selecting a signal of at least two types of operation driving signals corresponding to the signal of the at least two types of candidate signals from the plurality of the signal of the at least two types of initialization signals, and selecting one other signal of the at least two types of operation driving signals corresponding to the other signal of the at least two types of candidate signals from the plurality of the other signal of the at least two types of initialization signals; and driving the at least two types of light sources according to the signal of the at least two types of operation driving signals and the other signal of the at least two types of operation driving signals.