DEVICE, SYSTEM AND METHOD FOR EXTRACTING PHYSIOLOGICAL INFORMATION

摘要

The present invention relates to a device, system and a method for extracting physiological information indicative of at least one vital sign of a subject. To provide a high motion robustness, the proposed device comprises an input interface configured to obtain at least two detection signals derived from detected electromagnetic radiation transmitted through or reflected from a skin region of a subject, wherein each detection signal comprises wavelength-dependent reflection or transmission information in a different wavelength channel, a pulse signal computation unit configured to compute at least two pulse signals from said at least two detection signals using different signature vectors for the computation of each pulse signal, a quality indicator computation unit configured to compute quality indicator values for said pulse signals indicating a characteristic of the respective pulse signal, and a processing unit configured to derive physiological information indicative of at least one vital sign from the signature vector that results in the pulse signal with the best quality indicator value and/or from said pulse signal.

主权项

1. A device for extracting physiological information indicative of at least one vital sign of a subject, said device comprising:
an input interface configured to obtain at least two detection signals derived from detected electromagnetic radiation transmitted through or reflected from a skin region of a subject, wherein each detection signal comprises wavelength-dependent reflection or transmission information in a different wavelength channel, a pulse signal computation unit configured to compute at least two pulse signals from said at least two detection signals using different signature vectors for the computation of each pulse signal, said signature vectors providing an expected relative strength of the pulse signal in the at least two detection signals, wherein the computation of a pulse signal involves a weighted combination of the at least two detection signals using weights selected such that the resulting pulse signal correlates with the original detection signals as indicated by the respective signature vector, a quality indicator computation unit configured to compute quality indicator values for said pulse signals indicating a characteristic of the respective pulse signal, and a processing unit configured to derive physiological information indicative of at least one vital sign from the signature vector that results in the pulse signal with the best quality indicator value and/or from said pulse signal.