Patent ID: 11892577
Assignee: WUHAN CHANGSHENG MINE SECURITY TECHNOLOGY LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. The method of claim 3, wherein, performing a full waveform inversion on the first velocity model based on the low-frequency acoustic wave data to obtain a third velocity model comprises:
selecting acoustic wave data within a first pre-set low-frequency range from the low-frequency acoustic wave data;
performing a full waveform inversion on the first velocity model based on the acoustic wave data within the first pre-set low-frequency range;
updating the first velocity model based on the inversion result;
enlarging the first pre-set low-frequency range;
selecting acoustic wave data within the first pre-set low-frequency range from the low-frequency acoustic wave data; and
returning to the step of performing a full waveform inversion on the first velocity model based on the acoustic wave data within the first pre-set low-frequency range.