公开(公告)号：US12282132B2

公开(公告)日：2025-04-22

申请号：US18148472

申请日：2022-12-30

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Tianxu Zhang ,  Yuhai Lv ,  Jiawei Wang ,  Qinghui Zhang ,  Cheng Yang ,  Tao Zhang ,  Jiandong Tan

IPC: G01V3/08 ,  G01V3/38

Abstract: A sequence time window amplitude-phase-frequency characteristics analysis method and system for underwater vehicle power frequency electromagnetic field disturbance are provided. The method includes: establishing a power grid dipole group model, emulating and calculating to obtain background field intensity data of a test location, and constructing an emulated background field database; acquiring measured background field data, comparing the emulated data with the measured data, and providing a relative error; calculating a background field intensity and underwater vehicle target disturbance under the action of the above dipole group, and establishing a measured target signal database; and performing actual measurement according to an underwater vehicle motion and detection topology, performing a Fourier transform and Fourier sliding window decomposition after acquiring original data, and acquiring an amplitude spectrum and a spectrogram of an underwater vehicle target disturbance signal.

公开(公告)号：US20230213679A1

公开(公告)日：2023-07-06

申请号：US18148472

申请日：2022-12-30

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Tianxu Zhang ,  Yuhai Lv ,  Jiawei Wang ,  Qinghui Zhang ,  Cheng Yang ,  Tao Zhang ,  Jiandong Tan

IPC: G01V3/08 ,  G01V3/38

CPC classification number: G01V3/081 ,  G01V3/38

Abstract: A sequence time window amplitude-phase-frequency characteristics analysis method and system for underwater vehicle power frequency electromagnetic field disturbance are provided. The method includes: establishing a power grid dipole group model, emulating and calculating to obtain background field intensity data of a test location, and constructing an emulated background field database; acquiring measured background field data, comparing the emulated data with the measured data, and providing a relative error; calculating a background field intensity and underwater vehicle target disturbance under the action of the above dipole group, and establishing a measured target signal database; and performing actual measurement according to an underwater vehicle motion and detection topology, performing a Fourier transform and Fourier sliding window decomposition after acquiring original data, and acquiring an amplitude spectrum and a spectrogram of an underwater vehicle target disturbance signal.