一种舰船下方磁场的信号重构及换算方法

doi:10.19595/j.cnki.1000-6753.tces.210801

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Abstract In order to realize the accurate reconstruction and conversion of the ship magnetic field signal, based on the analysis of the scaled model test data, this paper first analyzes the time-frequency characteristics of the ship model magnetic field after magnetic treatment, establishes the relationship between the cutoff frequency and the maximum energy spectrum, and obtains the mathematical model between the sampling interval and the ship length, and then puts forward the calculation method of the maximum sampling interval suitable for the magnetic field. Finally, the magnetic field depth conversion is carried out by combining the magnet simulation method to verify the method in this paper. The results show that the method has good robustness to target shape, and it is suitable for both surface ships and underwater submarine targets. Under the condition of large sampling interval, high precision signal reconstruction can be completed. When the conversion is carried out from shallow to deep, the conversion error is less than 7%. When the conversion reference depth is not less than 3 times the ship width, the magnetic field conversion from shallow to deep and from deep to shallow can be completed, and the conversion error is less than 10%.

Key words： Ships magnetic field energy spectrum maximum sampling interval signal reconstruction depth conversion

Received: 28 May 2021

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TM153

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	Articles by authors
	Liu Qi
	Sun Zhaolong
	Jiang Runxiang
	Wu Xiaokang
	Lei Yiqin

Cite this article:

Liu Qi,Sun Zhaolong,Jiang Runxiang等. A Signal Reconstruction and Conversion Method of Magnetic Field under Ship[J]. Transactions of China Electrotechnical Society, 2022, 37(15): 3723-3732.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.210801 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I15/3723

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