基于OBF反变换的航空磁探测数据中方波干扰的剔除方法

doi:10.12305/j.issn.1001-506X.2025.07.04

摘要/Abstract

摘要：

航空磁异常探测数据中的方波干扰极易被磁异常信号检测系统误判为磁性目标信号，针对航空磁测数据中的方波干扰提出一直虚警剔出方法。在正交基函数(orthogonal basis function, OBF)分解实现疑似磁异常信号初检的基础上, 通过预估磁性目标的斜距进行OBF反变换得到与探测场景适配的反演信号, 进而采用比较两个时域信号的波形相似度来剔除方波干扰, 采用仿真数据和实测数据进行验证实验。结果表明, 与传统的OBF检测相比, 提出的对滤波信号和反演信号进行波形相似度比较方法能有效剔除方波干扰, 满足磁探测数据处理的低虚警率应用需求。

关键词: 航空磁异常探测, 磁干扰, 斜距估计, 信号反演, 相似度计算

Abstract:

The square wave interference in the aeromagnetic anomaly detection data is very likely to be misjudged as the magnetic target signal by the magnetic anomaly signal detection system. A false alarm reduction method is proposed for the square wave interference in the aeromagnetic survey data. Based on the orthogonal basis function (OBF) detection to initially alert suspected magnetic anomaly signals, the algorithm estimates the slant range and uses OBF inverse transformation to obtain inversion signals adapted to the detection scene, effectively eliminating square wave interference using waveform similarity comparison methods. Finally, verification experiments are conducted using simulated and real data. The results indicate that compared to traditional OBF detection, the proposed waveform similarity comparison method for filtered signal and inversion signal can effectively eliminate square wave interference, and meet the application requirements of low false alarm rate in the magnetic detection system.

Key words: airborne magnetic anomaly detection (MAD), magnetic interference, slant range estimation, signal inversion, similarity calculation

中图分类号:

陶荣华, 周春, 张宝强, 于振涛, 乔荷, 刘聪. 基于OBF反变换的航空磁探测数据中方波干扰的剔除方法[J]. 系统工程与电子技术, 2025, 47(7): 2110-2118.

Ronghua TAO, Chun ZHOU, Baoqiang ZHANG, Zhentao YU, He QIAO, Cong LIU. Based on OBF inverse transform to eliminate square wave interference in airborne magnetic anomaly detection data[J]. Systems Engineering and Electronics, 2025, 47(7): 2110-2118.

图/表 8

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