公开(公告)号：US12239456B1

公开(公告)日：2025-03-04

申请号：US17224587

申请日：2021-04-07

Applicant: Amazon Technologies, Inc.

Inventor： Giovanni Mata Magana ,  Evan Fletcher Dougal ,  Tianchen Li ,  Alexander David Savello ,  Ennzhi Chew

IPC: A61B5/00 ,  A61B5/08

Abstract: Systems and methods relating to a millimeter wave radio-frequency (RF) sleep monitoring device are described. The device includes a surface transparent to RF signals through which a radar device enclosed in a housing transmits RF signals. An antenna array is enclosed within the housing and is oriented at a non-zero angle with respect to a vertical axis of the device. The antenna array receives the reflected RF signals through the surface. The reflected RF signals are used to generate sleep monitoring data such as a respiratory rate or motion data associated with a user.

公开(公告)号：US12298430B1

公开(公告)日：2025-05-13

申请号：US17653271

申请日：2022-03-02

Applicant: Amazon Technologies, Inc.

Inventor： Karthik Kumar ,  Morris Yuanhsiang Hsu ,  Tianchen Li

IPC: G01S7/40 ,  G05D23/19

Abstract: Technologies for temperature gain control on radar units are described. A method includes determining a first value for an internal operating temperature corresponding to a steady-state of a radar unit. The method further includes causing the radar unit to operate in a first mode that heats the radar unit. The method further includes obtaining a second value for the internal operating temperature at a first time in the first mode and determining a third value indicating a measurement bias associated with the radar unit. The method further includes determining a fourth value using the second value and the third value. The fourth value indicates an updated internal operating temperature of the radar unit. The method further includes determining that the fourth value satisfies a threshold temperature condition corresponding to the first value. The method further includes causing the radar unit to stop operating in the first mode.