Sequence time window amplitude-phase-frequency characteristics analysis method for underwater vehicle power frequency electromagnetic field disturbance

US12282132B2 · kind B2 · utility

Assignee

• Huazhong University of Science and Technology · CN

Inventors

• Tianxu Zhang · 红钢城街道, CN
• Yuhai Lv · Hubei, CN
• Jiawei Wang · Beijing, CN
• Qinghui Zhang · Beijing, CN
• Cheng Yang · Hubei, CN
• Tao Zhang · Beijing, CN
• Jiandong Tan · Hubei, CN

Key dates

• Filing date: Dec 30, 2022
• Grant date: Apr 22, 2025
• Expiry date: Apr 25, 2043

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A90/30
• WIPO field: Measurement
• WIPO sector: Instruments

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.