Filtro digital para báscula digital, báscula digital que incluye filtro digital para báscula digital y método de proceso de filtrado por ondas

摘要

Provided are a digital filter for a digital weigher which is capable of reducing a calculation time in an adapted filter while maintaining a weighing accuracy, a digital weigher including the digital filter for the digital weigher, and a wave filtering process method using the digital filter for the digital weigher. A fixation section (311) of a FIR filter (31) removes an oscillating component in a predetermined frequency range, from a digital weighing signal (x j (n)). A determination device (32) determines whether or not an amplitude of an oscillating component contained in a digital weighing signal (y j (n) (m) ) derived by performing a wave filtering process by the FIR filter (31) falls within a predetermined allowable damping range (V). A control device (33) changes a frequency range of an oscillating component to be removed by an adaptive section (312) of the FIR filter (31) based on a result of the determination performed by the determination device (32). The adaptive section (312) of the FIR filter (31) performs the wave filtering process with respect to the oscillating component in the frequency range having been changed by the control device (33).