海洋多道地震拖缆数据采集包设计
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摘要
针对海洋地震信号幅度小、动态范围大、噪声干扰强等特点,设计了基于高精度32位Δ-Σ(Sigma-Delta)模数转换器(ADC)的海洋多道地震拖缆四通道采集包。该地震信号采集包以STM32L432为核心,使用SPI总线控制4片32位模数转换器完成地震信号采集,采用九轴姿态传感器实时监测拖缆姿态,通过RS485接口将地震数据和姿态数据上传到数传包。测试表明:该装置自噪声小、动态范围大、功耗小、运行可靠,对海洋地震勘探高精度信号采集研究具有借鉴意义。
In view of the small amplitude, large dynamic range, and strong noise interference of marine seismic signals, a four-channel acquisition package of multi-channel seismic streamer based on a high-precision 32-bit Δ-Σ analog-to-digital converter was designed. The seismic signal acquisition package, with STM32L432 as the core,uses the SPI bus to control four 32-bit analog-to-digital converters for seismic signal acquisition. In addition, a9-axis attitude sensor was used to monitor the streamer posture in real time, and the seismic data and attitude data were uploaded to digital packets via an RS485 bus. Tests showed that the device has the merits of small noise, large dynamic range, low power consumption, and reliable operation. It has great significance for the study of high-precision signal acquisition in marine seismic exploration.
In view of the small amplitude, large dynamic range, and strong noise interference of marine seismic signals, a four-channel acquisition package of multi-channel seismic streamer based on a high-precision 32-bit Δ-Σ analog-to-digital converter was designed. The seismic signal acquisition package, with STM32L432 as the core,uses the SPI bus to control four 32-bit analog-to-digital converters for seismic signal acquisition. In addition, a9-axis attitude sensor was used to monitor the streamer posture in real time, and the seismic data and attitude data were uploaded to digital packets via an RS485 bus. Tests showed that the device has the merits of small noise, large dynamic range, low power consumption, and reliable operation. It has great significance for the study of high-precision signal acquisition in marine seismic exploration.
引文
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[2]黄国成.海底天然气水合物资源勘探流程和评价方法[D].北京:中国地质大学,2008.Huang Guocheng.The process of resource exploration and estimate for submarine gas hudrate[D].Beijing:China University of Geosciences,2008.
[3]褚宏宪,孙运宝,秦轲,等.小道距高分辨率多道地震对天然气水合物勘查的适用性[J].海洋地质前沿,2015,31(6):50-54.Chu Hongxian,Sun Yunbao,Qin Ke,et al.Application of small-scale array high-resolution multi-channel seismic to gas hydrates exploration[J].Marine Geology Frontiers,2015,31(6):50-54.
[4]何叶,钟广法.海底滑坡及其反射地震识别综述[J].海洋科学,2015,39(1):116-125.He Ye,Zhong Guangfa.Current status of submarine landslide and their seismic recognition[J].Marine Sciences,2015,39(1):116-125.
[5]王海平,张伟,李春雷,等.海底浅层地质灾害的高分辨率地震识别技术[J].海洋科学,2014,38(7):103-109.Wang Haiping,Zhang Wei,Li Chunlei,et al.High resolution seismic identification of seafloor shallow geological hazards[J].Marine Sciences,2014,38(7):103-109.
[6]吴增海,宋克柱,曹平.用于海洋地震勘探的数字包设计与实现[J].数据采集与处理,2013,28(2):250-256.Wu Zenghai,Song Kezhu,Cao Ping.Design and Realization of Digitizer for Marine Seismic Exploration[J]Journal of Data Acquisition&Processing,2013,28(2):250-256.
[7]陈劲.水听器线列阵的数据采集与传输关键技术研究[D].天津:天津大学,2013.Chen Jin.Research on Key Technologies of data acquisition and transmission in hydrophone linear array[D].Tianjin:Tianjin University,2013.
[8]邢磊.海洋小多道地震高精度探测关键技术研究[D].青岛:中国海洋大学,2012.Xing Lei.Study of the key technologies of high-precision marine multichannel seismic survey[D].Qingdao:Ocean University of China,2012.
[9]王揆洋,黄逸凡,连艳红,等,海洋浅地层高分辨率多道地震探测技术及应用[M].北京:海洋出版社,2011.Wang Kuiyang,Huang Yifan,Lian Yanhong,et al.Marine Shallow Ground High-Resolution Multi-Channel Seismic Detection Technology and Application[M].Beijing:China Ocean Press,2011.
[10]Parkinson R.High Resolution Site Surveys[M].New York:Spon Press,2001:11.
[11]Jones E J W.Marine Geophysics[M].England:John Wiley&Sons Ltd,1999.
[12]裴彦良,赵月霞,刘保华,等.近海高分辨率多道地震拖缆系统及其在海洋工程中的应用[J].地球物理学进展,2010,25(1):331-336.Pei Yanliang,Zhao Yuexia,Liu Baohua,et al.The offshore high-resolution multi-channel seismicstreamer and its application to the ocean engineering[J].Progress in Geophysics,2010,25(1):331-336.
[13]裴彦良,刘保华,连艳红,等.海洋高分辨率多道数字地震拖缆技术研究与应用[J].地球物理学进展,2013,28(6):3280-3286.Pei Yanliang,Liu Baohua,Lian Yanhong,et al.Marine high resolution multi-channel digital seismic streamer and its application in the ocean engineering[J].Progress in Geophysics,2013,28(6):3280-3286.
[14]刘春阳,徐军领,程洪涛,等.MPU9250传感器的姿态检测与数据融合[J].河南科技大学学报:自然科学版,2015,36(4):14-17.Liu Chunyang,Xu Junling,Cheng Hongtao,et al.Attitude detection and data fusion based on sensor of MPU9250[J].Journal of Henan University of Science&Technology,2015,36(4):14-17.