基于包络信号的轴频电场深度换算方法

靳 雄; 姜润翔; 程锦房; 陈新刚

doi:10.11993/j.issn.2096-3920.2020.04.008

基于包络信号的轴频电场深度换算方法

doi: 10.11993/j.issn.2096-3920.2020.04.008

1.
海军工程大学兵器工程学院, 湖北武汉, 430033
2.
海军工程大学电气工程学院, 湖北武汉, 430033
3.
中国人民解放军92942部队, 北京, 100161

基金项目: 青岛海洋科学与技术国家实验室“问海计划”项目.

详细信息

作者简介:
靳雄(1991-), 男, 在读硕士, 主要研究方向为目标特性及信息感知技术.

中图分类号: U674.70 TP274
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- 文章访问数: 276
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- 被引次数: 0
出版历程
- 收稿日期: 2019-10-04
- 修回日期: 2019-12-09
- 刊出日期: 2020-08-31

A Depth Conversion Method of Shaft-Rate Electric Field Based on Envelope Signal

1.
Department of Weaponry Engineering, Naval University of Engineering, Wuhan 430033, China
2.
College of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China
3.
92942th Unit, The Peoples Liberation Army of China, Beijing 100161, China

摘要

摘要: 在仅利用水平时谐电偶极子对舰船轴频电场信号进行换算时, 存在近场深度误差较大的问题。文中首先在仿真数据的基础上, 明确了船体表面不同位置电流密度与轴地电阻值波动时的变化规律; 其次, 提出了基于包络信号的轴频电场深度换算方法, 该方法在希尔伯特(Hilbert)变换计算轴频电场信号包络的基础上, 将轴频电场近场的深度换算问题转化为包络信号等效静电场的近场换算问题, 并利用点电荷模型建立了轴频电场信号包络在“空气—海水—海床”3层介质条件下的正演及反演模型。最后, 分别利用4种阴极防腐状态下的船模试验数据对所提方法的有效性进行了检验, 结果表明, 所提方法能够较好地实现对轴频电场信号包络值的准确换算, 以相对均方根误差作为评价准则, 水深为1倍船模宽度的换算误差小于15%。文中方法可为舰船近场的轴频电场反演提供新的途径。
- 舰船 /
- 轴频电场 /
- 点电荷 /
- 反演
Abstract: Only application of the horizontal time-harmonic dipole to the conversion of the shaft-rate electric field signal of ship will result in large near-field depth error. In this study, the variation laws of the current density in different position of hull surface and the shaft-ground resistance are clarified on the basis of simulation data. A depth conversion method of shaft-rate electric field is proposed based on its envelope signal. In this method, the depth conversion problem in the near field of the shaft-rate electric field signal envelope is transformed into the near-field conversion problem of equivalent static electric field after the calculation of the shaft-rate electric field signal envelope via Hilbert transform, and the point charge model is used to establish a forward and inversion model of the shaft-rate electric field signal envelope in the ‘air-sea-seabed’ three-layer media condition. The effectiveness of the proposed method is verified by four kinds of cathodic corrosion protection test data of the ship model. The results show that the proposed method can accurately calculate the shaft-rate electric field signal envelope. Taking root square error as evaluation criteria, the conversion error is less than 15% in the depth equaling the ship model width
- ship /
- shaft-rate electric field /
- point charge /
- inversion

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参考文献(16)

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