US 11,881,097 B2
Method and device for detecting fall accident by using sensor in low power state
Hyeonseong Kim, Gyeonggi-do (KR); Jeonggwan Kang, Gyeonggi-do (KR); Chanung Park, Gyeonggi-do (KR); and Seunghyuck Shin, Gyeonggi-do (KR)
Assigned to Samsung Electronics Co., Ltd
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed on Jul. 31, 2020, as Appl. No. 16/944,794.
Claims priority of application No. 10-2019-0094587 (KR), filed on Aug. 2, 2019; and application No. 10-2020-0080825 (KR), filed on Jul. 1, 2020.
Prior Publication US 2021/0035431 A1, Feb. 4, 2021
Int. Cl. G08B 23/00 (2006.01); G08B 21/04 (2006.01); A61B 5/11 (2006.01); A61B 5/00 (2006.01); H04W 4/02 (2018.01)
CPC G08B 21/0446 (2013.01) [A61B 5/0051 (2013.01); A61B 5/1117 (2013.01); A61B 5/681 (2013.01); G08B 21/043 (2013.01); H04W 4/027 (2013.01); A61B 2560/0257 (2013.01)] 17 Claims
OG exemplary drawing
1. An electronic device comprising:
an inertia sensor;
an atmospheric pressure sensor;
a processor operatively connected to the inertia sensor, the atmospheric pressure sensor, and a memory; and
the memory operatively connected to the processor,
wherein the memory is configured to store instructions which, when executed, cause the processor to:
acquire acceleration sensing data from the inertia sensor, wherein the acceleration sensing data acquired by the inertia sensor includes a local frame value corresponding to a relative coordinate system, and atmospheric pressure sensing data from the atmospheric pressure sensor;
convert the acceleration sensing data from a local frame to a navigation frame;
extract a value less than 0, as a gravity direction feature from an upward value of the acceleration sensing data converted into the navigation frame;
sense the occurrence of movement of the electronic device with a direction of gravity, with reference to a peak of the gravity direction feature;
sense whether the electronic device has fallen based on the acceleration sensing data and the atmospheric pressure sensing data;
perform a first process for determining a fall accident based on a gravity-free section and a second process for determining a fall accident based on a difference value between gravity direction features after an impact timepoint, when it is determined that the electronic device has fallen; and
determine a user has fallen, when it is determined that the fall accident has happened based on the first process and the second process.