基于背景噪音功率谱密度的海底地震仪零飘校正方法
By analyzing the background noise power spectral density of seafloor seismometers, and using Fourier transform and cross-correlation algorithms, the problem of zero drift correction in passive source observation OBS arrays was solved, achieving high-precision and low-cost zero drift correction, which is suitable for time synchronization correction of seafloor seismometers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SECOND INST OF OCEANOGRAPHY MNR
- Filing Date
- 2023-11-24
- Publication Date
- 2026-07-17
AI Technical Summary
The zero drift phenomenon in passive source observation seabed seismograph (OBS) arrays is difficult to correct, affecting the accuracy of seismic records and imaging effects, and existing methods cannot effectively solve this problem.
By analyzing the background noise power spectral density of the OBS array, and using Fourier transform and cross-correlation algorithms, the zero drift value of the OBS is determined and corrected. This includes extracting seismic background noise data, segmenting and processing it, calculating the power spectral density, comparing peak energy sequences, and performing cross-correlation calculations to achieve zero drift correction.
It achieves simple and effective zero-drift correction, has a wide range of applications, high accuracy, reduces the difficulty of observation, does not require artificial excitation of the seismic source, and can accurately correct the zero-drift value in natural earthquake records.
Smart Images
Figure CN117631083B_ABST