热带海洋学报
熱帶海洋學報
열대해양학보
JOURNAL OF TROPICAL OCEANOGRAPHY
2015年
4期
54-58
,共5页
海底地震仪%性能测试%音频信号%检测指标
海底地震儀%性能測試%音頻信號%檢測指標
해저지진의%성능측시%음빈신호%검측지표
OBS%performance testing%audio signal%testing indicator
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。
海底地震儀(ocean bottom seismometer, OBS)採集數據的可靠性取決于地震儀的性能,但目前國內還沒有配套的OBS 性能檢測設備。OBS 可控音頻測試儀藉鑒瞭拖纜地震採集繫統的性能檢測繫統,使用脈遲信號和固定頻率的音頻信號作為源信號,併針對OBS的性能指標在齣航前進行性能檢測,即波形一緻性、時間一緻性、主頻偏差與頻譜分析、信譟比、增益分析和脈遲與頻譜分析,來確定OBS的可靠性,從而保證數據採集的質量,為野外作業提供瞭技術保障。
해저지진의(ocean bottom seismometer, OBS)채집수거적가고성취결우지진의적성능,단목전국내환몰유배투적OBS 성능검측설비。OBS 가공음빈측시의차감료타람지진채집계통적성능검측계통,사용맥충신호화고정빈솔적음빈신호작위원신호,병침대OBS적성능지표재출항전진행성능검측,즉파형일치성、시간일치성、주빈편차여빈보분석、신조비、증익분석화맥충여빈보분석,래학정OBS적가고성,종이보증수거채집적질량,위야외작업제공료기술보장。
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.