Pedometer device and step detection method using an algorithm for self-adaptive computation of acceleration thresholds.

摘要

In a pedometer device (1), for detecting and counting steps of a user on foot, an accelerometer sensor (2) detects a vertical acceleration generated during the step. A processing unit (3) is connected to the accelerometer sensor (2), processes an acceleration signal (CalAcc) relating to the acceleration (A) in order to detect the occurrence of a step, and in particular compares the acceleration signal (CalAcc) with a first reference threshold (S+). The processing unit (3) automatically adapts the first reference threshold (S+) as a function of the acceleration signal (CalAcc). In particular, the processing unit (3) modifies the first reference threshold (S+) as a function of an envelope (Env+) of the amplitude of the acceleration signal.