公开(公告)号：US10018481B1

公开(公告)日：2018-07-10

申请号：US14502168

申请日：2014-09-30

Applicant: InvenSense, Inc.

Inventor： Hemabh Shekhar ,  Dhruv Srivastava ,  Shang Hung Lin ,  Sankalita Saha

IPC: G01C22/00

CPC classification number: G01C22/006

Abstract: A system and method for reliably counting user steps. Various aspects may, for example, comprise processing a plurality of frequency bands of at least one sensor signal to accurately count user steps. A plurality of filtered sensor signals may be formed by filtering a sensor signal with a plurality of band-pass filters from which a dominant filtered sensor signal may be selected. The selected dominant filtered sensor signal may then be used to count user steps. Further, a frequency band of a sensor signal may be selected such that if it is determined the user is not engaged in a non-stepping activity, user steps may be counted using the content of the signal in the selected frequency band. Still further, user steps may be counted using an identified dominant harmonic.