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测震数采仪记录的钻孔应变
杨选辉, 杨树新, 张彬, 张国红, 刘福生, 柳艳智, 王勇
中国地震局地壳应力研究所,北京市海淀区西三旗安宁庄路1 号100085
摘要:
采用测震仪数采器在昌平台站开展了高频采集实验,对原来1 次/分钟采样的钻孔应变仪输出进行100 次/ 秒采样,记录到大量丰富的信息。计算了高频采样获得的应变记录分钟值后,发现与原来的1 次/分钟采样变化曲线趋势完全吻合。高频采样获得的应变地震波更加完整,细节更为清晰。通过应变地震波计算得到的震相参数,与前人所得结果一致。与十三陵地震台测震仪记录的地震波比较,二者的波谱相似,且应变地震波中还存在低频成份。
关键词:  钻孔应变仪  测震数采  高频采集  采样率  应变地震波
DOI:
分类号:
基金项目:中国地震地壳应力研究所中央级公益性科研院所基本科研业务专项(ZDJ2008-40、ZDJ2010-15)资助
Strains recorded by seismic acquisition unit
Yang Xuanhui, Yang Shuxin, Zhang Bin, Zhang Guohong, Liu Fusheng, Liu Yanzhi, Wan Yong
Institute of Crustal Dynamics,CEA,Beijing 100085,China
Abstract:
A seismometer acquisition has been used at the Changping Observing Station to gather the output of strainmeter. The original rate of the strainmeter of once per minute changed to 100 times per second for seismometer acquisition sampling. Plenty of higher frequency data are recorded and the minutely data calculated from seismometer acquisition are consistent with the original data sampled by strain acquisition. And more completed waveform are recorded through higher sampling. The seismic phase parameters calculated by strain earthquake waves of higher sampling rate are also consistent with predecessors. Spectrum of the strain earthquake waves are compared with seismic waves recorded by a seismometer at the Shisanling Seismic Station,and their trends are almost the same. Some lower frequency ingredients exist in strain waves.
Key words:  Bore-hole strainmeter  Seismometer acquisition  Higher frequency sampling  Sampling rate  Strain earthquake wave