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    • 1. 发明申请
    • WEARABLE MULTI-MODAL PHYSIOLOGICAL SENSING SYSTEM
    • 多种模式生理感知系统
    • US20160287181A1
    • 2016-10-06
    • US15037315
    • 2013-12-05
    • APPLE INC.
    • Chin San HANAlbert WANG
    • A61B5/00A61B5/024
    • A61B5/7214A61B5/02416A61B5/6824A61B5/6825A61B5/6831A61B5/7225A61B5/7246A61B5/7435
    • A PPG signal may be obtained from a pulse oximeter, which employs a light emitter and a light sensor to measure the perfusion of blood to the skin of a user. However, the signal may be compromised by noise due to motion artifacts. To address the presence of motion artifacts, examples of the present disclosure can receive light information from each of two light guides, one in contact with the tissue of the user and one not in contact with the tissue of the user. First light information can be obtained from the first light guide, and second light information can be obtained from the second light guide. A heart rate signal can then be computed from the first and second light information, for example, by using blind source separation and/or cross-correlation.
    • PPG信号可以从采用光发射器和光传感器的脉搏血氧计获得,以测量血液对使用者皮肤的灌注。 然而,由于运动伪影,该信号可能被噪声所损害。 为了解决运动伪影的存在,本公开的示例可以从两个光导中的每一个接收光信息,一个与用户的组织接触,而不与用户的组织接触。 可以从第一光导获得第一光信息,并且可以从第二光导获得第二光信息。 然后可以例如通过使用盲源分离和/或互相关从第一和第二光信息计算心率信号。