Patent ID: 11921012
Assignee: SEIKO EPSON CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
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.