半航空电磁法全流程低噪声关键技术研究  

Research on key technologies of the low-noise system for Semi-airborne electromagnetic method

作　　者：武欣 薛国强[1,2] 陈卫营 石金晶[1,2] WU Xin;XUE GuoQiang;CHEN WeiYing;SHI JinJing(Key Laboratory of Mineral Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京100029 [2]中国科学院大学地球与行星科学学院,北京100029

出　　处：《地球物理学报》2023年第9期3904-3913,共10页Chinese Journal of Geophysics

基　　金：中国科学院仪器研制项目(YJKYYQ20190004);国家自然科学基金项目(42074121,42030106);陕西省和西北有色地质矿业集团有限公司项目(XBDKKJ202112)资助。

摘　　要：半航空电磁法(SAEM)是一种有利于在复杂地形地表条件下高效、低成本开展探测的新兴方法,尤其适合我国国情.SAEM数据受多种系统内外部噪声影响,信号质量不佳;传统去噪方法针对不同噪声逐一处理,步骤多、主观因素强.针对上述问题,本文考虑同时在压制噪声来源与增强去噪方法两方面做工作,提出一套全流程低噪声解决方案:采用降噪搭载结构抑制主要外部噪声,低噪声混合放大电路抑制主要内部噪声,基于深度学习的一站式去噪方法克服主观因素影响,从而在整个SAEM观测与处理流程上实现低噪声.测试表明,在地形复杂、气流条件复杂地区,所研发的SAEM系统可稳定工作,数据可靠性一致性高,未来有望为我国资源探查、深部工程等工作提供更为有力的支撑.Semi-airborne electromagnetic method(SAEM)is a novel method that is favorable for efficient and low-cost exploration under complex terrain and surface conditions,especially suitable for China's national conditions.SAEM data is affected by internal and external noise of various systems,and the signal quality is relatively limited.The different noises will be processed one by one in the traditional denoising methods,with many steps and strong subjective factors.In view of the above problems,this research considers focusing on both suppressing noise sources and enhancing noise removal methods,so as to propose a whole process low-noise solution.The noise reduction carrying structure is used to suppress the main external noise,the low-noise hybrid amplifier circuit is used to suppress the main internal noise,and the one-stop noise removal method based on deep learning is mainly used to overcome the influence of subjective factors,to achieve low-noise in the whole SAEM observation and processing process.The test shows that in areas with complex terrain and airflow conditions,the developed SAEM system can work stably with high data reliability and consistency,which is expected to provide more powerful support for resource exploration,deep engineering,and other work in China in the future.

关 键 词：半航空电磁法 运动噪声 搭载结构 低噪声放大电路 噪声去除 

分 类 号：P631[天文地球—地质矿产勘探]