超低空无人机航磁在海缆探测中的应用实验  

Application test of aeromagnetic technology of ultra-low altitude UAV in submarine cable detection

作　　者：周普志 李正元 汤民强 唐水亮 王斐 杨佳 ZHOU Puzhi;LI Zhengyuan;TANG Minqiang;TANG Shuiliang;WANG Fei;YANG Jia(South China Sea Marine Survey and Technology Center,State Oceanic Administration,Guangzhou 510275,China;Key Laboratory of Marine Environmental Survey Technology and Application,Ministry of Natural Resources,Guangzhou 510275,China;Zhejiang Danian Technology Co.,Ltd,Ningbo 315400,China;Beijing Orangelamp Geophysical Exploration Co.,Ltd,Beijing 102200,China)

机构地区：[1]国家海洋局南海调查技术中心,广东广州510275 [2]自然资源部海洋环境探测技术与应用重点实验室,广东广州510275 [3]浙江大年科技有限公司,浙江宁波315400 [4]北京桔灯地球物理勘探股份有限公司,北京102200

出　　处：《海洋测绘》2023年第4期10-14,共5页Hydrographic Surveying and Charting

基　　金：自然资源部海洋环境探测技术与应用重点实验室自主设立研究课题(MESTA-2022-D006)。

摘　　要：为解决近岸海底电缆“最后一公里”高精度探测和定位的技术难题,在构建近岸海底电缆磁异常正演模型,分析正演曲线特性的基础上,引入超低空无人机航磁技术,对阳江风电场密集分布的近岸海底电缆进行探测,验证不同飞行高度对电缆探测效果的影响;计算平面磁异常总梯度模能够减弱局部异常之间的叠加和干扰作用,推断海底电缆走向。实验结果证明:采用观测高度为10 m的超低空旋翼无人机航磁探测,在近岸区域获得了预期探测效果;实验采用平面磁异常总梯度模的计算方法,有效提高了海底电缆的平面解析能力。In order to solve the technical problem of high-precision detection and positioning of the“last kilometer”of offshore submarine cables,this paper innovatively uses the ultra-low altitude UAV aeromagnetic technology to detect the offshore submarine cable densely distributed in the Yangjiang wind farm to verify the influence of different altitudes on the cable detection effect,based on the construction of the forward model of the magnetic anomaly of the offshore submarine cable and the analysis of the characteristics of the forward curve.The analytical method of total gradient mode of plane magnetic anomaly is introduced to infer the trend of submarine cable.The experimental results show that the aeromagnetic detection of ultra-low altitude rotorcraft UAV with the observation height of 10 m has achieved the expected detection effect in the nearshore area;In the experiment,the calculation method of total gradient mode of plane magnetic anomaly effectively improves the plane analytical ability of submarine cable.

关 键 词：超低空航磁 海底电缆探测 正演曲线 平面总梯度模 旋翼无人机 

分 类 号：P229.24[天文地球—大地测量学与测量工程]