US 11,921,012 B2
Abnormality determination for bridge superstructure based on acceleration data
Yoshihiro Kobayashi, Komagane (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Feb. 25, 2022, as Appl. No. 17/680,453.
Claims priority of application No. 2021-029995 (JP), filed on Feb. 26, 2021.
Prior Publication US 2022/0276119 A1, Sep. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01M 5/00 (2006.01)
CPC G01M 5/0008 (2013.01) [G01M 5/0066 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A measurement method for causing a processor to execute a program stored in a memory, the measurement method comprising executing on the processor:
a target data generation step of acquiring target data, the target data corresponding to observation data sensed by an acceleration sensor, the acceleration sensor being disposed at a superstructure of a bridge, the observation data corresponding to displacement of the superstructure due to moving of a movable object on the superstructure, the target data including a drift noise of the acceleration sensor;
a high-pass filter processing step of performing high-pass filter processing on the target data to generate drift noise reduction data in which the drift noise is reduced;
a correction data estimation step of estimating, based on the drift noise reduction data, correction data corresponding to a difference between the drift noise reduction data and data obtained by removing the drift noise from the target data;
a measurement data generation step of generating measurement data by adding the drift noise reduction data and the correction data; and
an abnormality determination step of determining an abnormality of the superstructure of the bridge based on the measurement data.