HEART RATE MONITORING METHOD AND DEVCIE WITH MOTION NOISE SIGNAL REDUCTION

摘要

A heart rate monitoring method and device to analyze signals in time or frequency domain with motion noise signal reduction comprises at least two LEDs for providing two different light signals for incidenting into a portion of a human, a photodetector for detecting two reflected and scattered signals reflected and scattered form the human, and a processor for eliminating motion noise signal cause by any motion of the human. The processor may compare the two reflected and scattered signals and execute an independent component analysis to obtain a correct heart rate signal in time domain, and then the processor can calculate the correct heart rate. The processor may transform the two reflected and scattered signals form time domain to frequency domain and compare the two reflected and scattered signals in frequency domain to obtain a heart rate signal in frequency domain, and then the processor can calculate the heart rate.

主权项

1. A heart rate monitoring method to analyze signals with motion noise signal reduction, comprising:
providing a first light signal with a first wavelength and a second light signal with a second wavelength for incidenting into a portion of a human body; detecting a first signal and a second signal reflected and scattered from the human body; wherein the first signal is a reflected and scattered signal of the first light signal, and the second signal is a reflected and scattered signal of the second light signal; filtering the first signal and the second signal; determining whether a motion noise signal is combined with the filtered first signal or the filtered second signal; when the motion noise signal is not combined with the filtered first signal or the filtered second signal, calculating a heart rate according to the filtered first signal; when the motion noise signal is combined with the filtered first signal or the filtered second signal, eliminating the motion noise signal from the filtered first signal and the filtered second signal to obtain a heart rate signal, and calculating the heart rate according to the heart rate signal.