US 11,809,513 B2
Signal processing method and signal processing device
Masayoshi Todorokihara, Suwa (JP)
Assigned to SEIKO EPSON CORPORATION
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Jul. 20, 2021, as Appl. No. 17/380,077.
Claims priority of application No. 2020-124345 (JP), filed on Jul. 21, 2020.
Prior Publication US 2022/0027433 A1, Jan. 27, 2022
Int. Cl. G06F 17/15 (2006.01); G06F 17/14 (2006.01)
CPC G06F 17/15 (2013.01) [G06F 17/14 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A signal processing method comprising:
a processing target signal generation step of generating a processing target signal that is a time-series signal, based on a source signal that is a time-series signal corresponding to a physical quantity generated in a steady state of a target object; and
a correlated signal generation step of performing correlation filter processing between a template signal that is a time-series signal generated based on the source signal, and the processing target signal, and generating a correlated signal that is a time-series signal,
wherein the source signal includes a plurality of signal components that are cyclic, and the plurality of signal components have different cycles from each other,
a time length of the template signal is longer than a cycle of a first signal component of the plurality of signal components and shorter than a time length of the processing target signal, and
a difference between the time length of the processing target signal and the time length of the template signal is longer than the cycle of the first signal component.