公开(公告)号：US20250139496A1

公开(公告)日：2025-05-01

申请号：US18495259

申请日：2023-10-26

Applicant: STMicroelectronics International N.V.

Inventor： Tae-gil Kang ,  Hyeok Won ,  Junyeong Ji ,  Sanghyuk Park

IPC: G06N20/00 ,  G01P1/00 ,  G01P15/08 ,  G01P15/18

Abstract: According to an embodiment, a method for determining whether a fall of a device is on a hard surface or a soft surface is proposed. The method includes collecting N samples of acceleration data after detecting a free-fall event; applying a high-pass filter on the N samples of acceleration data; calculating a variance from the N samples of acceleration data after applying the high-pass filter on the N samples of acceleration data; determining that the fall is on the hard surface in response to the variance from the N samples of acceleration data after applying the high-pass filter on the N samples of acceleration data being greater than a threshold; and determining that the fall is on the soft surface in response to the variance from the N samples of acceleration data after applying the high-pass filter on the N samples of acceleration data being less than the threshold.