高频海底地震仪性能检测
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摘要
海底地震仪(ocean bottom seismometer,OBS)采集数据的可靠性取决于地震仪的性能,但目前国内还没有配套的OBS性能检测设备。OBS可控音频测试仪借鉴了拖缆地震采集系统的性能检测系统,使用脉冲信号和固定频率的音频信号作为源信号,并针对OBS的性能指标在出航前进行性能检测,即波形一致性、时间一致性、主频偏差与频谱分析、信噪比、增益分析和脉冲与频谱分析,来确定OBS的可靠性,从而保证数据采集的质量,为野外作业提供了技术保障。
Reliability of ocean bottom seismometer(OBS) data depends on the performance of OBS, but there is no OBS performance detection equipment in China currently. The OBS controllable audio test instrument refer to the performance testing system for towing seismic acquisition system, and uses pulse signal and fixed frequency audio signal as the source signal. OBS performance is tested in terms of performance index before sailing. These indexes include the waveform consistency, time consistency, frequency deviation, spectral analysis, signal-to-noise ratio, gain analysis and pulse spectral analysis. The OBS controllable audio test instrument can determine the reliability of OBS, ensure the high quality of data collected by OBS, and provides technical support for field operation.
Reliability of ocean bottom seismometer(OBS) data depends on the performance of OBS, but there is no OBS performance detection equipment in China currently. The OBS controllable audio test instrument refer to the performance testing system for towing seismic acquisition system, and uses pulse signal and fixed frequency audio signal as the source signal. OBS performance is tested in terms of performance index before sailing. These indexes include the waveform consistency, time consistency, frequency deviation, spectral analysis, signal-to-noise ratio, gain analysis and pulse spectral analysis. The OBS controllable audio test instrument can determine the reliability of OBS, ensure the high quality of data collected by OBS, and provides technical support for field operation.
引文
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郝小柱,伍忠良,王伟巍,等.2013.海底地震仪精密计时器的研制与运用[J].气象水文海洋仪器,(30):9–13.
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邵安民,张玉云,赵风文.2003.海底地震数据记录器[J].地球物理学报,46(2):224–228.
王彦林,阎贫,郑红波,等.2007.OBS记录的时间和定位误差校正[J].热带海洋学报,26(5):40–46.
伍忠良,王伟巍,罗跃逸,等.2012.OBS记录波形一致性分析[J].数学理论与运用,(32):61–67.
薛彬,阮爱国,李湘云,等.2008.SEDISⅣ型短周期自浮式海底地震仪数据校正方法[J].海洋学研究,26(2):98–102.
游庆瑜,刘福田,冉崇荣.2003a.MCI微功耗宽频带数字地震仪[J].地球物理学报,46(3):347–351.
游庆瑜,刘福田,冉崇荣,等.2003b.高频微功耗海底地震仪研制[J].地球物理学进展,18(1):173–176.
郝小柱,伍忠良,曾宪军.2008.海底地震仪及其发展现状[J]中国科技成果,(17):33–36.
郝小柱,伍忠良,王伟巍,等.2013.海底地震仪精密计时器的研制与运用[J].气象水文海洋仪器,(30):9–13.
康玉梅,朱万成,陈耕野,等.2011.基于小波变换的岩石声发射信号互相关分析及时延估计[J].岩土力学,(7):2079–2084.
李江,庄灿涛,薛兵,等.2010.宽频带海底地震仪的研制[J]地震学报,32(5):610–618.
邵安民,张玉云,赵风文.2003.海底地震数据记录器[J].地球物理学报,46(2):224–228.
王彦林,阎贫,郑红波,等.2007.OBS记录的时间和定位误差校正[J].热带海洋学报,26(5):40–46.
伍忠良,王伟巍,罗跃逸,等.2012.OBS记录波形一致性分析[J].数学理论与运用,(32):61–67.
薛彬,阮爱国,李湘云,等.2008.SEDISⅣ型短周期自浮式海底地震仪数据校正方法[J].海洋学研究,26(2):98–102.
游庆瑜,刘福田,冉崇荣.2003a.MCI微功耗宽频带数字地震仪[J].地球物理学报,46(3):347–351.
游庆瑜,刘福田,冉崇荣,等.2003b.高频微功耗海底地震仪研制[J].地球物理学进展,18(1):173–176.