董一兵, 胡斌, 杨锐, 尹康达. 河北赤城可控震源主动监测实验[J]. 华北地震科学, 2015, 33(4): 6-13. DOI: 10.3969/j.issn.1003-1375.2015.04.002
引用本文: 董一兵, 胡斌, 杨锐, 尹康达. 河北赤城可控震源主动监测实验[J]. 华北地震科学, 2015, 33(4): 6-13. DOI: 10.3969/j.issn.1003-1375.2015.04.002
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DONG Yi-bing, HU Bin, YANG Rui, YIN Kang-da. Active Monitoring Experiment in Chicheng Using Precision Seismic Vibrator[J]. North China Earthquake Sciences, 2015, 33(4): 6-13. DOI: 10.3969/j.issn.1003-1375.2015.04.002
Citation: DONG Yi-bing, HU Bin, YANG Rui, YIN Kang-da. Active Monitoring Experiment in Chicheng Using Precision Seismic Vibrator[J]. North China Earthquake Sciences, 2015, 33(4): 6-13. DOI: 10.3969/j.issn.1003-1375.2015.04.002
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河北赤城可控震源主动监测实验

Active Monitoring Experiment in Chicheng Using Precision Seismic Vibrator

    摘要
  • 摘要: 利用精密可控主动震源CASS-40在赤城开展了2次信号发射与监测实验。实验中分别采用5～10～5 Hz、4～10～4 Hz线性调频信号，布设了赤城—张家口、赤城—张北2条测线，对发射信号进行连续记录。用短时Fourier变换分析了发射信号的时频特征，用反褶积和WHT变换2种方法计算得到了2条测线的地震波走时剖面，对结果进行了对比分析。选取震相清晰的临时台站计算了波速比（Vp/Vs），结果与已有的研究成果相符。

     

    Abstract: Two experiments are done in Chicheng in which the CASS-40 seismic vibrator is used to trigger seismic waves and temporary stations are set up to receive the waves. In the experiment, the chirp signal at 5-10-5 Hz and 4-10-4 Hz are used and two survey lines are emplaced from Chicheng to Zhangjiakou and from Chicheng to Zhangbei to continuously record the transmitted signal. STFT(Short-time Fourier Transform) is used to analyze the frequency characteristics of the LFM(Linear Frequency Modulation), and two methods of deconvolution and WHT (Wigner-HoughTransform) are both used to get the seismic wave travelling curve. The difference between their results is analyzed. Clear phases are selected to calculate the velocity ratio (Vp/Vs) of the temporary station. The result is approved to be consistent with the existing researches.

     

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