Seafloor Stability Monitoring by Displacements Calculated from Acceleration Waveforms Obtained by a 3-Component Servo-Accelerometer System

摘要

In order to monitor the seafloor stability daring methane hydrate productions, a monitoring system continuously measuring seafloor displacement is required. We have been developing a system that mainly consists of a 3-component servo-accelerometer and gimbaled mechanism in a pressure chamber. The observed acceleration waveform data are used to calculate displacements by double integrals with noise reduction. An initial model of the system was created and tested in laboratory and at an onshore landslide site. As the results of those tests, we confirmed that the monitoring by servo-accelerometer is practical.