Ground motion measuring device, ground motion measuring system using the same, and inclination correction method of seismograph

摘要

PROBLEM TO BE SOLVED: To provide an earthquake motion measurement device 10 to be helpful for quick and exact alarm processing.;SOLUTION: An earthquake motion measurement device 10 includes: earthquake acceleration time series acquisition means 121 for acquiring an orthogonal-three-component earthquake acceleration time series; smoothing means 122 for performing smoothing processing of the earthquake acceleration time series transmitted from the earthquake acceleration time series acquisition means to acquire smoothing time series; tilt angle determination means 125 for determining gravitational acceleration and a tilt angle from the smoothing time series transmitted from the smoothing means 122 to acquire gravitational acceleration time series and tilt angle time series; tilt angle determination means 126 for determining validity of the gravitational acceleration time series and tilt angle time series transmitted from the tilt angle determination means 125; and tilt angle correction means 128 for correcting the earthquake acceleration time series transmitted from the earthquake acceleration time series acquisition means 121 using tilt angle time series transmitted from the tilt angle determination means 125 to acquire tilt angle corrected acceleration time series.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2019,JPO&INPIT