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

Claim 13:
14. The method of claim 3, wherein performing a full waveform inversion on the third velocity model based on the high-frequency acoustic wave data to obtain the second velocity model comprises:
selecting acoustic wave data within a second pre-set low-frequency range from the high-frequency acoustic wave data;
performing a full waveform inversion on the third velocity model based on the acoustic wave data within the second pre-set low-frequency range;
updating the third velocity model based on the inversion result;
enlarging the second pre-set low-frequency range;
selecting acoustic wave data within the second pre-set low-frequency range from the high-frequency acoustic wave data; and
returning to the step of performing a full waveform inversion on the third velocity model based on the acoustic wave data within the second pre-set low-frequency range.