基于ExactBlackman窗函数的海底线缆磁法探测应用与分析  

Application and analysis of ExactBlackman window function in magnetic detection of submarine cable

作　　者：彭聪 汤民强 欧阳永忠 贺惠忠 王颖[4] PENG Cong;TANG Minqiang;OUYANG Yongzhong;HE Huizhong;WANG Ying(South China Sea Marine Survey and Technology Center,State Oceanic Administration,Guangzhou 510300,China;Key Laboratory of Ocean Geomatics,MNR,Qingdao 266590,China;Key Laboratory of Marine Environmental Survey Technology and Application,MNR,Guangzhou 510300,China;School of Geographic and Oceanographic Sciences,Nanjing University,Nanjing 210023,China)

机构地区：[1]国家海洋局南海调查技术中心,广东广州510300 [2]自然资源部海洋测绘重点实验室,山东青岛266590 [3]自然资源部海洋探测与应用重点实验室,广东广州510300 [4]南京大学地理与海洋学院,江苏南京210023

出　　处：《海洋测绘》2023年第1期19-23,共5页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(42174013);自然资源部海洋测绘重点实验室开放基金(2021B11)。

摘　　要：针对海洋作业环境复杂条件下海底线缆探测部分交越点处磁异常信号微弱,影响交越点坐标判读精度的问题,提出将ExactBlackman窗函数引入交越点磁法探测数据处理流程当中,给出了最佳的ExactBlackman窗函数输入参数范围,并基于实测海底线缆探测数据进行了比较分析。结果表明:与滑动平均滤波器的处理方法相比,ExactBlackman窗函数具有幅值识别精度高、分离磁异常特征更清晰的特点,其交越点定位精度能提高5%左右。研究可用于指导海底线缆磁法探测数据处理实践,提高交越点坐标判读精度。In order to solve the problem that the magnetic anomaly signal at the intersection point of submarine cable detection is weak under the complex conditions of the marine operating environment,the ExactBlackman window function is introduced into the intersection point magnetic detection data processing process,the optimal range of input parameters of ExactBlackman window function is given,and the comparative analysis is carried out based on the measured submarine cable detection data.The results show that,compared with the sliding average filter processing method,the ExactBlackman window function has the characteristics of high amplitude recognition accuracy and clearer separation of magnetic anomaly features,and its intersection point localization accuracy can be improved by about 5%.The research in this paper can be used to guide the practice of magnetic detection data processing of submarine cables and improve the accuracy of intersection point coordinate interpretation.

关 键 词：磁法探测 ExactBlackman窗函数 数据处理 磁异常 海底管线 

分 类 号：P229.24[天文地球—大地测量学与测量工程]