公开(公告)号：US12298243B2

公开(公告)日：2025-05-13

申请号：US18318037

申请日：2023-05-16

Applicant: PLUME DESIGN, INC.

Inventor： Min-Feng Hsieh ,  Ta-Lung Lee ,  Shu-Hua Chang ,  Zhicheng Qiu

IPC: G01N21/55 ,  A61B5/024

Abstract: Systems and methods of embodiments of the present disclosure provide automated testing of PPG sensors using a programmatically controlled rotational actuator. The rotational actuator may include one or more light reflecting surfaces that can be actuated towards and away from the PPG sensor to simulate reflectivity of the tissue of a subject. Particular heart rates, heart rate variabilities and/or other physiological behaviors may be simulated based on actuations patterns, including, e.g., frequency, range of actuation, or variations thereof, among other actuation pattern characteristics. Based on the output signal produced by the PPG sensor in response to the actuation pattern, the PPG sensor may be assessed for accuracy and/or sensitivity to ensure quality.

公开(公告)号：US20240194333A1

公开(公告)日：2024-06-13

申请号：US18079090

申请日：2022-12-12

Applicant: Plume Design, Inc.

Inventor： Ta-Lung Lee ,  Zhicheng Qiu

IPC: G16H40/63 ,  A61B5/00 ,  A61B5/024

CPC classification number: G16H40/63 ,  A61B5/02427 ,  A61B5/7278

Abstract: Processes for correcting time interval calculations in a dataset are provided. A method, according to one implementation, includes obtaining a sequence of data points (x) representing time interval calculations (y), each time interval calculation (y) based on a length of time between two successive peaks (p) in a photoplethysmography (PPG) waveform, each peak (p) presumed to represent a volumetric blood-flow peak during one of multiple cycles of the PPG waveform. In response to detecting one or more spurious data points in a segment of the sequence, the method includes creating one or more artificial data points for replacing the one or more spurious data points, wherein the one or more artificial data points are derived using the time interval calculation (y) of each of the one or more spurious data points. In some cases, the method may be performed by a smart ring having a PPG sensor and processing device.