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

Claim 11:
12. A measurement device, comprising:
a memory configured to store a program; and
a processor configured to execute the program so as to:
acquire 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 and a vibration component of the superstructure;
perform high-pass filter processing on the target data to generate drift noise reduction data in which the drift noise is reduced;
estimate, 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;
generate measurement data by adding the drift noise reduction data and the correction data; and
determine an abnormality of the superstructure of the bridge based on the measurement data.