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双基地合成孔径声呐时间同步误差分析
引用本文:郭慧,黄勇,王迎迎,刘纪元.双基地合成孔径声呐时间同步误差分析[J].应用声学,2020,39(2):292-299.
作者姓名:郭慧  黄勇  王迎迎  刘纪元
作者单位:中国科学院声学研究所,中国科学院声学研究所,中国科学院声学研究所,中国科学院声学研究所
摘    要:远探测声波测井技术目前正成为复杂油气藏勘探开发的有力手段,而反射方位信息对于储层评价以及工程措施都至关重要。利用集成了测量单偶极不同方位多分量波场功能的多分量远探测声波测井仪器,研究了单偶极远探测联合识别反射方位的方法。由于仪器的影响,单极子不同方位反射波存在振幅差异,据此可以快速判断反射界面方位,但是其准确性依赖于方位接收器个数。偶极SH反射波幅度反映了反射界面的走向变化,但是存在180?的不确定性。结合单偶极远探测方法的优势,可以快速准确地识别出反射界面方位。理论模拟和实际数据处理表明,两种方法的联合识别,提高了结果的可靠性。

关 键 词:声波测井  多分量  远探测  方位识别
收稿时间:2019/4/1 0:00:00
修稿时间:2020/2/26 0:00:00

Analysis of time synchronization errors in bistatic synthetic aperture sonar
LI Chao,ZHANG Bo,XU Xiaokai,ZHANG Jinyan,CHEN Hao,HE Xiao,WANG Xiuming.Analysis of time synchronization errors in bistatic synthetic aperture sonar[J].Applied Acoustics,2020,39(2):292-299.
Authors:LI Chao  ZHANG Bo  XU Xiaokai  ZHANG Jinyan  CHEN Hao  HE Xiao  WANG Xiuming
Institution:Institute of Acoustic, Chinese Academic of Sciences,Institute of Acoustics, Chinese Academy of Sciences,Institute of Acoustics, Chinese Academy of Sciences and Institute of Acoustics, Chinese Academy of Sciences
Abstract:The bistatic synthetic aperture sonar overcomes many shortcomings of the monostatic sonar system, and has great advantages in imaging performance. However time synchronization technology is still an significant factor that restricts imaging quality, so analysis of time synchronization error is an important issue worthy of attention. Based on the signal echo model and time synchronization error model, the resolution under the influence of error is calculated, and the theoretical analysis of the error influence of the bistatic synthetic aperture sonar is carried out and verified by simulation. The results showed that the fixed time error mainly results in focus position migration in distance dimension, the linear time error results in the azimuth focus blur, and the random time error results in the rising of side lobes both in distance dimension and azimuth dimension.
Keywords:Bistatic synthetic aperture sonar  Time synchronization errors  Resolution calculation  Analysis of error impact
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