Method employing bumping algorithm for estimation of signal frequency and displacement estimation method and device

摘要

A displacement estimation method is disclosed which comprises: a signal capturing step for capturing a signal; a displacement estimation step for calculating a displacement based on a state change of the signal; and an output step for outputting the displacement, in which the displacement estimation step includes one or more of the steps of: (A) consistency check to determine whether the state change of the signal is consistent with the waveform of the signal; (B) period prediction and compensation to count in the present period according to a proportional length of a previous period; and (C) adaptive threshold update to adjust the definition of the state change corresponding to the amplitude of the signal. A displacement estimation device employing this method, and a method for estimation of signal frequency based on bumping algorithm are also disclosed.