通过两步采样方法实现强大的压缩传感地震采集
Anna Titova1, Michael B Wakin2, Ali C Tura1
1Department of Geophysics, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, USA.
Sensors (Basel, Switzerland)
|December 9, 2023
概括
本研究介绍了一种两步方法,用于设计使用压力传感 (CS) 的地震调查. 这种方法创造了高效的采样模式,改善了地震数据的获取和分析,用于现场应用.
科学领域:
- 地质物理学 地质物理学
- 信号处理 信号处理
- 地震调查设计 设计 地震调查设计
背景情况:
- 传统的地震调查通常需要密集的,无别名的采样,这可能是昂贵的和物流上具有挑战性的.
- 压缩传感 (CS) 为采集信号提供了一个框架,采集率低于传统方法.
- 设计基于CS的地震采集需要专门的采样模式,满足理论要求和实际约束.
研究的目的:
- 提出和评估一种新的两步设计流程,用于生成基于压力传感的地震采样方案.
- 确保生成的采样模式符合CS理论属性,同时控制空间采样特征.
- 为了证明拟议方法的适用性和稳定性,用于实际的3D地震调查设计.
主要方法:
- 采用了两步采样策略:以受限制的同位素属性为指导的初始统一随机采样,其次是有针对性的样本添加.
- 第二步,由零空间属性证明,添加样本来控制相邻源或接收器之间的最大距离.
- 该方法允许对活跃和省略的样本进行灵活的控制,并通过重新分配的样本和CS重建来测试其稳定性.
主要成果:
- 提出的两步采样方法成功生成了具有强大的CS理论基础的地震采样模式.
- 该方法可控制相邻采样点之间的最大距离,并允许灵活的样本分配.
- CS重建测试和对设计的3D地震调查 (折叠地图,图) 的分析证实了两步方案的适用性.
结论:
- 开发的两步采样设计对于创建基于压力传感的地震采集方案是有效的.
- 该方法平衡了理论的CS要求与实际的地质物理和后勤考量,用于地震调查.
- 提出的方法适用于基于CS的地震调查,并证明在现场应用中具有实际实用性.
相关概念视频
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In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
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01:22Upsampling
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01:18Aliasing
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01:15Sampling Theorem
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01:11Sampling Continuous Time Signal
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01:12Double Resonance Techniques: Overview
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