基于希尔伯特变换的Chirp信号浅地层剖面数据分析及转换
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摘要
浅地层剖面系统在海洋工程勘察、海洋矿产资源探测等方面发挥着重要的作用。美国EdgeTech公司生产的3200系列是一种应用较为广泛的Chirp信号浅地层剖面系统,该仪器原始记录的JSF格式数据与传统的SEGY地震数据格式存在很多不同的地方,具体体现在文件头和道头部分,特别是数据记录方式上它同时记录了包络信号和振幅信号两种类型的数据。因此,编写适用的C程序代码将JSF原始数据转换为包络信号和振幅信号两种类型的SEG-Y标准地震数据,并运用该程序读取并转换了南海北部某区域的实测浅剖数据,并分析了浅剖资料解释中采用包络信号数据的原因,为利用振幅信号数据反演海底反射系数等后续工作奠定了基础。
Sub-bottom profile system has played an important role in the marine engineering survey,exploration of marine mineral resources,et al.The kind of 3200 series sub-bottom profile system produced by EdgeTech Company of America is a widely used sub-bottom profile based on chirp signal.The JSF format is very different from the standard SEG-Y format,embodied on file header and trace header.Especially,the original data of JSF format include amplitude data and envelop data.At the same time,the code of program with C language is compiled to read the original data of JSF format and transform the data to two types of seismic data of SEG-Y format.Finally,practical data in the northern South China Sea was read and converted by the program.The reason why envelop data profile was adopted to interpret sea-bottom geological structure was explained,which has established foundation for inversion of seabed reflection coefficient with the amplitude data.
Sub-bottom profile system has played an important role in the marine engineering survey,exploration of marine mineral resources,et al.The kind of 3200 series sub-bottom profile system produced by EdgeTech Company of America is a widely used sub-bottom profile based on chirp signal.The JSF format is very different from the standard SEG-Y format,embodied on file header and trace header.Especially,the original data of JSF format include amplitude data and envelop data.At the same time,the code of program with C language is compiled to read the original data of JSF format and transform the data to two types of seismic data of SEG-Y format.Finally,practical data in the northern South China Sea was read and converted by the program.The reason why envelop data profile was adopted to interpret sea-bottom geological structure was explained,which has established foundation for inversion of seabed reflection coefficient with the amplitude data.
引文
[1]L R LeBlanc,L Maye,MRufino,et al.Marine Sediment Classification Using the Chirp Sonar[J].J Acoust Soc Am,1992,91(1):107-115.
[2]S G Schock.Remote Estimates of Physical and Acoustic Sediment Properties in the South China Sea Using Chirp Sonar Data and the Biot Model[J].IEEE Journal of Oceanic Engineering,2004,29(4):1218-1230.
[3]D W Caress.Some Comments on the Signal Processing Used by Chirp Subbottom Profilers.2009.http://www.mbari.org/data/mbsystem/sonarfunction/SubbottomProcessing/subbottomdataprocessing.html
[4]阎贫,陈多福.南海北部白云凹陷渗漏型天然气水合物地球物理证据[J].热带海洋学报.2009,28(3):85.
[5]朱德兵.工程地球物理方法技术研究现状综述[J].地球物理学进展.2002,17(1):163-170.
[6]刘秀娟,高抒,赵铁虎.浅地层剖面原始数据中海底反射信号的识别及海底地形的自动提取[J].物探与化探.2009,33(5):576-579.
[7]肖剑,柳斌,郭亚龙,等.基于希尔伯特变换的干涉仪信号处理[J].探测与控制学报,2010,32(1):80-83.
[8]刘毅华,王媛媛,宋执环.基于平稳小波包分解和希尔伯特变换的故障特征自适应提取[J].电工技术学报,2009,2:145-149.
[9]张伟,王彦春,李洪臣,等.地震道瞬时强度比法拾取初至波[J].地球物理学进展,2009,24(1):201-204.
[10]Edge Tech.Description of The Edgetech.(jsf)File Format,2009.
[2]S G Schock.Remote Estimates of Physical and Acoustic Sediment Properties in the South China Sea Using Chirp Sonar Data and the Biot Model[J].IEEE Journal of Oceanic Engineering,2004,29(4):1218-1230.
[3]D W Caress.Some Comments on the Signal Processing Used by Chirp Subbottom Profilers.2009.http://www.mbari.org/data/mbsystem/sonarfunction/SubbottomProcessing/subbottomdataprocessing.html
[4]阎贫,陈多福.南海北部白云凹陷渗漏型天然气水合物地球物理证据[J].热带海洋学报.2009,28(3):85.
[5]朱德兵.工程地球物理方法技术研究现状综述[J].地球物理学进展.2002,17(1):163-170.
[6]刘秀娟,高抒,赵铁虎.浅地层剖面原始数据中海底反射信号的识别及海底地形的自动提取[J].物探与化探.2009,33(5):576-579.
[7]肖剑,柳斌,郭亚龙,等.基于希尔伯特变换的干涉仪信号处理[J].探测与控制学报,2010,32(1):80-83.
[8]刘毅华,王媛媛,宋执环.基于平稳小波包分解和希尔伯特变换的故障特征自适应提取[J].电工技术学报,2009,2:145-149.
[9]张伟,王彦春,李洪臣,等.地震道瞬时强度比法拾取初至波[J].地球物理学进展,2009,24(1):201-204.
[10]Edge Tech.Description of The Edgetech.(jsf)File Format,2009.
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